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Ahrimdon
2024-03-07 00:54:15 -05:00
parent cf5aa2ac65
commit f329b4ea3e
11851 changed files with 4050098 additions and 17 deletions
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35
deps/curl/docs/libcurl/opts/CMakeLists.txt vendored Normal file
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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# Load man_MANS from shared file
transform_makefile_inc("Makefile.inc" "${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake")
include("${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake")
add_manual_pages(man_MANS)
string(REPLACE ".3" ".html" HTMLPAGES "${man_MANS}")
string(REPLACE ".3" ".pdf" PDFPAGES "${man_MANS}")
add_custom_target(opts-html DEPENDS ${HTMLPAGES})
add_custom_target(opts-pdf DEPENDS ${PDFPAGES})
add_dependencies(html opts-html)
add_dependencies(pdf opts-pdf)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_ACTIVESOCKET 3 "12 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_ACTIVESOCKET \- get the active socket
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_ACTIVESOCKET,
curl_socket_t *socket);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_socket_t to receive the most recently active socket
used for the transfer connection by this curl session. If the socket is no
longer valid, \fICURL_SOCKET_BAD\fP is returned. When you are finished working
with the socket, you must call \fIcurl_easy_cleanup(3)\fP as usual on the easy
handle and let libcurl close the socket and cleanup other resources associated
with the handle. This option returns the active socket only after the transfer
is complete, and is typically used in combination with
\fICURLOPT_CONNECT_ONLY(3)\fP, which skips the transfer phase.
\fICURLINFO_ACTIVESOCKET(3)\fP was added as a replacement for
\fICURLINFO_LASTSOCKET(3)\fP since that one is not working on all platforms.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_socket_t sockfd;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Do not do the transfer - only connect to host */
curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
res = curl_easy_perform(curl);
/* Extract the socket from the curl handle */
res = curl_easy_getinfo(curl, CURLINFO_ACTIVESOCKET, &sockfd);
if(res != CURLE_OK) {
printf("Error: %s\\n", curl_easy_strerror(res));
return 1;
}
}
}
.fi
.SH AVAILABILITY
Added in 7.45.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_LASTSOCKET (3),
.BR CURLOPT_CONNECT_ONLY (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_APPCONNECT_TIME 3 "28 Aug 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_APPCONNECT_TIME \- get the time until the SSL/SSH handshake is completed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_APPCONNECT_TIME,
double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the time, in seconds, it took from the
start until the SSL/SSH connect/handshake to the remote host was completed.
This time is most often close to the \fICURLINFO_PRETRANSFER_TIME(3)\fP time,
except for cases such as HTTP pipelining where the pretransfer time can be
delayed due to waits in line for the pipeline and more.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double connect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_APPCONNECT_TIME, &connect);
if(CURLE_OK == res) {
printf("Time: %.1f", connect);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.19.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_APPCONNECT_TIME_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_APPCONNECT_TIME_T 3 "28 Apr 2018" "libcurl" "libcurl"
.SH NAME
CURLINFO_APPCONNECT_TIME_T \- time until the SSL/SSH handshake completed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_APPCONNECT_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the time, in microseconds, it took
from the start until the SSL/SSH connect/handshake to the remote host was
completed. This time is most often close to the
\fICURLINFO_PRETRANSFER_TIME_T(3)\fP time, except for cases such as HTTP
pipelining where the pretransfer time can be delayed due to waits in line for
the pipeline and more.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t connect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_APPCONNECT_TIME_T, &connect);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", connect / 1000000,
(long)(connect % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_APPCONNECT_TIME (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CAINFO 3 "20 May 2022" "libcurl" "libcurl"
.SH NAME
CURLINFO_CAINFO \- get the default built-in CA certificate path
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CAINFO, char **path);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the default built-in path used for the \fICURLOPT_CAINFO(3)\fP
option unless set by the user.
Note that in a situation where libcurl has been built to support multiple TLS
libraries, this option might return a string even if the specific TLS library
currently set to be used does not support \fICURLOPT_CAINFO(3)\fP.
This is a path identifying a single file containing CA certificates.
The \fBpath\fP pointer is set to NULL if there is no default path.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
char *cainfo = NULL;
curl_easy_getinfo(curl, CURLINFO_CAINFO, &cainfo);
if(cainfo) {
printf("default ca info path: %s\\n", cainfo);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.84.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CAPATH (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CAPATH 3 "20 May 2022" "libcurl" "libcurl"
.SH NAME
CURLINFO_CAPATH \- get the default built-in CA path string
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CAPATH, char **path);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the default built-in path used for the \fICURLOPT_CAPATH(3)\fP
option unless set by the user.
Note that in a situation where libcurl has been built to support multiple TLS
libraries, this option might return a string even if the specific TLS library
currently set to be used does not support \fICURLOPT_CAPATH(3)\fP.
This is a path identifying a directory.
The \fBpath\fP pointer is set to NULL if there is no default path.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
char *capath = NULL;
curl_easy_getinfo(curl, CURLINFO_CAPATH, &capath);
if(capath) {
printf("default ca path: %s\\n", capath);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.84.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CAINFO (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CERTINFO 3 "12 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CERTINFO \- get the TLS certificate chain
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CERTINFO,
struct curl_certinfo **chainp);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIstruct curl_certinfo *\fP and it is set to point to a
struct that holds info about the server's certificate chain, assuming you had
\fICURLOPT_CERTINFO(3)\fP enabled when the request was made.
.nf
struct curl_certinfo {
int num_of_certs;
struct curl_slist **certinfo;
};
.fi
The \fIcertinfo\fP struct member is an array of linked lists of certificate
information. The \fInum_of_certs\fP struct member is the number of
certificates which is the number of elements in the array. Each certificate's
list has items with textual information in the format "name:content" such as
\&"Subject:Foo", "Issuer:Bar", etc. The items in each list varies depending on
the SSL backend and the certificate.
.SH PROTOCOLS
All TLS-based
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
/* connect to any HTTPS site, trusted or not */
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L);
res = curl_easy_perform(curl);
if(!res) {
int i;
struct curl_certinfo *ci;
res = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &ci);
if(!res) {
printf("%d certs!\\n", ci->num_of_certs);
for(i = 0; i < ci->num_of_certs; i++) {
struct curl_slist *slist;
for(slist = ci->certinfo[i]; slist; slist = slist->next)
printf("%s\\n", slist->data);
}
}
}
curl_easy_cleanup(curl);
}
}
.fi
See also the \fIcertinfo.c\fP example.
.SH AVAILABILITY
This option is only working in libcurl built with OpenSSL, GnuTLS, Schannel or
Secure Transport. GnuTLS support added in 7.42.0. Schannel support added in
7.50.0. Secure Transport support added in 7.79.0.
Added in 7.19.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CAPATH (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONDITION_UNMET 3 "1 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONDITION_UNMET \- get info on unmet time conditional or 304 HTTP response.
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONDITION_UNMET,
long *unmet);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the number 1 if the condition provided in
the previous request did not match (see \fICURLOPT_TIMECONDITION(3)\fP). Alas,
if this returns a 1 you know that the reason you did not get data in return is
because it did not fulfill the condition. The long this argument points to
gets a zero stored if the condition instead was met. This can also return 1 if
the server responded with a 304 HTTP status code, for example after sending a
custom "If-Match-*" header.
.SH PROTOCOLS
HTTP and some
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* January 1, 2020 is 1577833200 */
curl_easy_setopt(curl, CURLOPT_TIMEVALUE, 1577833200L);
/* If-Modified-Since the above time stamp */
curl_easy_setopt(curl, CURLOPT_TIMECONDITION,
(long)CURL_TIMECOND_IFMODSINCE);
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
/* check the time condition */
long unmet;
res = curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &unmet);
if(!res) {
printf("The time condition was %sfulfilled\\n", unmet?"NOT":"");
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.19.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_TIMECONDITION (3),
.BR CURLOPT_TIMEVALUE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONNECT_TIME 3 "28 Aug 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONNECT_TIME \- get the time until connect
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONNECT_TIME, double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total time in seconds from the start
until the connection to the remote host (or proxy) was completed.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double connect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME, &connect);
if(CURLE_OK == res) {
printf("Time: %.1f", connect);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONNECT_TIME_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONNECT_TIME_T 3 "28 Apr 2018" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONNECT_TIME_T \- get the time until connect
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONNECT_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the total time in microseconds from
the start until the connection to the remote host (or proxy) was completed.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t connect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_CONNECT_TIME_T, &connect);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", connect / 1000000,
(long)(connect % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONNECT_TIME (3),
.BR CURLOPT_CONNECTTIMEOUT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONN_ID 3 "07 June 2023" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONN_ID \- get the ID of the last connection used by the handle
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONN_ID,
curl_off_t *conn_id);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the connection identifier last
used by the handle. Stores -1 if there was no connection used.
The connection id is unique among all connections using the same
connection cache. This is implicitly the case for all connections in the
same multi handle.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
curl_off_t conn_id;
res = curl_easy_getinfo(curl, CURLINFO_CONN_ID, &conn_id);
if(!res) {
printf("Connection used: %" CURL_FORMAT_CURL_OFF_T "\\n", conn_id);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 8.2.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_XFER_ID (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONTENT_LENGTH_DOWNLOAD 3 "1 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONTENT_LENGTH_DOWNLOAD \- get content-length of download
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD,
double *content_length);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the content-length of the download. This
is the value read from the Content-Length: field. Since 7.19.4, this returns
-1 if the size is not known.
\fICURLINFO_CONTENT_LENGTH_DOWNLOAD_T(3)\fP is a newer replacement that returns a more
sensible variable type.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
double cl;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &cl);
if(!res) {
printf("Size: %.0f\\n", cl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.6.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONTENT_LENGTH_UPLOAD (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONTENT_LENGTH_DOWNLOAD_T 3 "25 May 2017" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONTENT_LENGTH_DOWNLOAD_T \- get content-length of download
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T,
curl_off_t *content_length);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the content-length of the
download. This is the value read from the Content-Length: field. Stores -1 if
the size is not known.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
curl_off_t cl;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
if(!res) {
printf("Download size: %" CURL_FORMAT_CURL_OFF_T "\\n", cl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONTENT_LENGTH_UPLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONTENT_LENGTH_UPLOAD 3 "1 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONTENT_LENGTH_UPLOAD \- get the specified size of the upload
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_UPLOAD,
double *content_length);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the specified size of the upload. Since
7.19.4, this returns -1 if the size is not known.
\fICURLINFO_CONTENT_LENGTH_UPLOAD_T(3)\fP is a newer replacement that returns a
more sensible variable type.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the upload */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
double cl;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_UPLOAD, &cl);
if(!res) {
printf("Size: %.0f\\n", cl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.6.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONTENT_LENGTH_DOWNLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONTENT_LENGTH_UPLOAD_T 3 "25 May 2017" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONTENT_LENGTH_UPLOAD_T \- get the specified size of the upload
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_UPLOAD_T,
curl_off_t *content_length);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the specified size of the
upload. Stores -1 if the size is not known.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the upload */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
curl_off_t cl;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_UPLOAD_T, &cl);
if(!res) {
printf("Upload size: %" CURL_FORMAT_CURL_OFF_T "\\n", cl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONTENT_LENGTH_DOWNLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_CONTENT_TYPE 3 "1 Sep 2015" "libcurl" "libcurl"
.SH NAME
CURLINFO_CONTENT_TYPE \- get Content-Type
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_TYPE, char **ct);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the content-type of the downloaded
object. This is the value read from the Content-Type: field. If you get NULL,
it means that the server did not send a valid Content-Type header or that the
protocol used does not support this.
The \fBct\fP pointer is set to NULL or pointing to private memory. You MUST
NOT free it - it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the
corresponding CURL handle.
The modern way to get this header from a response is to instead use the
\fIcurl_easy_header(3)\fP function.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(!res) {
/* extract the content-type */
char *ct = NULL;
res = curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ct);
if(!res && ct) {
printf("Content-Type: %s\\n", ct);
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.9.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_header (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_HEADERFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_COOKIELIST 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_COOKIELIST \- get all known cookies
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_COOKIELIST,
struct curl_slist **cookies);
.fi
.SH DESCRIPTION
Pass a pointer to a 'struct curl_slist *' to receive a linked-list of all
cookies curl knows (expired ones, too). do not forget to call
\fIcurl_slist_free_all(3)\fP on the list after it has been used. If there are
no cookies (cookies for the handle have not been enabled or simply none have
been received) the 'struct curl_slist *' is made a NULL pointer.
Since 7.43.0 cookies that were imported in the Set-Cookie format without a
domain name are not exported by this option.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* enable the cookie engine */
curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "");
res = curl_easy_perform(curl);
if(!res) {
/* extract all known cookies */
struct curl_slist *cookies = NULL;
res = curl_easy_getinfo(curl, CURLINFO_COOKIELIST, &cookies);
if(!res && cookies) {
/* a linked list of cookies in cookie file format */
struct curl_slist *each = cookies;
while(each) {
printf("%s\\n", each->data);
each = each->next;
}
/* we must free these cookies when we are done */
curl_slist_free_all(cookies);
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.14.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_COOKIELIST (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_EFFECTIVE_METHOD 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_EFFECTIVE_METHOD \- get the last used HTTP method
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_EFFECTIVE_METHOD,
char **methodp);
.fi
.SH DESCRIPTION
Pass in a pointer to a char pointer and get the last used effective HTTP
method.
In cases when you have asked libcurl to follow redirects, the method may not be
the same method the first request would use.
The \fBmethodp\fP pointer is NULL or points to private memory. You MUST NOT
free - it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the
corresponding CURL handle.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "data");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *method = NULL;
curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_METHOD, &method);
if(method)
printf("Redirected to method: %s\\n", method);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.72.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_CUSTOMREQUEST (3),
.BR CURLOPT_FOLLOWLOCATION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_EFFECTIVE_URL 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_EFFECTIVE_URL \- get the last used URL
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_EFFECTIVE_URL, char **urlp);
.fi
.SH DESCRIPTION
Pass in a pointer to a char pointer and get the last used effective URL.
In cases when you have asked libcurl to follow redirects, it may not be the same
value you set with \fICURLOPT_URL(3)\fP.
The \fBurlp\fP pointer is NULL or points to private memory. You MUST NOT free
- it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *url = NULL;
curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
if(url)
printf("Redirect to: %s\\n", url);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_FOLLOWLOCATION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_FILETIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_FILETIME \- get the remote time of the retrieved document
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_FILETIME, long *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the remote time of the retrieved document
in number of seconds since January 1 1970 in the GMT/UTC time zone. If you get
-1, it can be because of many reasons (it might be unknown, the server might
hide it or the server does not support the command that tells document time
etc) and the time of the document is unknown.
You must tell libcurl to collect this information before the transfer is made,
by using the \fICURLOPT_FILETIME(3)\fP option to \fIcurl_easy_setopt(3)\fP or
you this unconditionally gets a -1 back.
Consider using \fICURLINFO_FILETIME_T(3)\fP to be able to extract dates beyond
the year 2038 on systems using 32 bit longs (Windows).
.SH PROTOCOLS
HTTP(S), FTP(S), SFTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Ask for filetime */
curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
long filetime = 0;
res = curl_easy_getinfo(curl, CURLINFO_FILETIME, &filetime);
if((CURLE_OK == res) && (filetime >= 0)) {
time_t file_time = (time_t)filetime;
printf("filetime: %s", ctime(&file_time));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.5
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_FILETIME (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_FILETIME 3 "25 Jan 2018" libcurl libcurl
.SH NAME
CURLINFO_FILETIME_T \- get the remote time of the retrieved document
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_FILETIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the remote time of the retrieved
document in number of seconds since January 1 1970 in the GMT/UTC time
zone. If you get -1, it can be because of many reasons (it might be unknown,
the server might hide it or the server does not support the command that tells
document time etc) and the time of the document is unknown.
You must ask libcurl to collect this information before the transfer is made,
by using the \fICURLOPT_FILETIME(3)\fP option to \fIcurl_easy_setopt(3)\fP or
you unconditionally get a -1 back.
This option is an alternative to \fICURLINFO_FILETIME(3)\fP to allow systems
with 32 bit long variables to extract dates outside of the 32bit timestamp
range.
.SH PROTOCOLS
HTTP(S), FTP(S), SFTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
/* Ask for filetime */
curl_easy_setopt(curl, CURLOPT_FILETIME, 1L);
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
curl_off_t filetime;
res = curl_easy_getinfo(curl, CURLINFO_FILETIME_T, &filetime);
if((CURLE_OK == res) && (filetime >= 0)) {
time_t file_time = (time_t)filetime;
printf("filetime: %s", ctime(&file_time));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.59.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_FILETIME (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_FTP_ENTRY_PATH 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_FTP_ENTRY_PATH \- get entry path in FTP server
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_FTP_ENTRY_PATH, char **path);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive a pointer to a string holding the
path of the entry path. That is the initial path libcurl ended up in when
logging on to the remote FTP server. This stores a NULL as pointer if
something is wrong.
The \fBpath\fP pointer is NULL or points to private memory. You MUST NOT free
- it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
FTP(S) and SFTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com");
res = curl_easy_perform(curl);
if(!res) {
/* extract the entry path */
char *ep = NULL;
res = curl_easy_getinfo(curl, CURLINFO_FTP_ENTRY_PATH, &ep);
if(!res && ep) {
printf("Entry path was: %s\\n", ep);
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.15.4. Works for SFTP since 7.21.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_HEADER_SIZE 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_HEADER_SIZE \- get size of retrieved headers
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HEADER_SIZE, long *sizep);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the total size of all the headers
received. Measured in number of bytes.
The total includes the size of any received headers suppressed by
\fICURLOPT_SUPPRESS_CONNECT_HEADERS(3)\fP.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long size;
res = curl_easy_getinfo(curl, CURLINFO_HEADER_SIZE, &size);
if(!res)
printf("Header size: %ld bytes\\n", size);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_REQUEST_SIZE (3),
.BR CURLINFO_SIZE_DOWNLOAD (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_HTTPAUTH_AVAIL 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_HTTPAUTH_AVAIL \- get available HTTP authentication methods
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive a bitmask indicating the authentication
method(s) available according to the previous response. The meaning of the
bits is explained in the \fICURLOPT_HTTPAUTH(3)\fP option for
\fIcurl_easy_setopt(3)\fP.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(!res) {
/* extract the available authentication types */
long auth;
res = curl_easy_getinfo(curl, CURLINFO_HTTPAUTH_AVAIL, &auth);
if(!res) {
if(!auth)
printf("No auth available, perhaps no 401?\\n");
else {
printf("%s%s%s%s\\n",
auth & CURLAUTH_BASIC ? "Basic ":"",
auth & CURLAUTH_DIGEST ? "Digest ":"",
auth & CURLAUTH_NEGOTIATE ? "Negotiate ":"",
auth % CURLAUTH_NTLM ? "NTLM ":"");
}
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added RFC 2617 in 7.10.8
Added RFC 7616 in 7.57.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_PROXYAUTH_AVAIL (3),
.BR CURLOPT_HTTPAUTH (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_HTTP_CONNECTCODE 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_HTTP_CONNECTCODE \- get the CONNECT response code
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTP_CONNECTCODE, long *p);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the last received HTTP proxy response code
to a CONNECT request. The returned value is zero if no such response code was
available.
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* typically CONNECT is used to do HTTPS over HTTP proxies */
curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long code;
res = curl_easy_getinfo(curl, CURLINFO_HTTP_CONNECTCODE, &code);
if(!res && code)
printf("The CONNECT response code: %03ld\\n", code);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.10.7
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RESPONSE_CODE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_HTTP_VERSION 3 "11 May 2016" libcurl libcurl
.SH NAME
CURLINFO_HTTP_VERSION \- get the http version used in the connection
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTP_VERSION, long *p);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the version used in the last http
connection done using this handle. The returned value is
CURL_HTTP_VERSION_1_0, CURL_HTTP_VERSION_1_1, CURL_HTTP_VERSION_2_0,
CURL_HTTP_VERSION_3 or 0 if the version cannot be determined.
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long http_version;
curl_easy_getinfo(curl, CURLINFO_HTTP_VERSION, &http_version);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.50.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RESPONSE_CODE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_LASTSOCKET 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_LASTSOCKET \- get the last socket used
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LASTSOCKET, long *socket);
.fi
.SH DESCRIPTION
Deprecated since 7.45.0. Use \fICURLINFO_ACTIVESOCKET(3)\fP instead.
Pass a pointer to a long to receive the last socket used by this curl
session. If the socket is no longer valid, -1 is returned. When you finish
working with the socket, you must call \fIcurl_easy_cleanup(3)\fP as usual and
let libcurl close the socket and cleanup other resources associated with the
handle. This is typically used in combination with
\fICURLOPT_CONNECT_ONLY(3)\fP.
NOTE: this API is deprecated since it is not working on win64 where the SOCKET
type is 64 bits large while its 'long' is 32 bits. Use the
\fICURLINFO_ACTIVESOCKET(3)\fP instead, if possible.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
long sockfd; /* does not work on win64! */
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Do not do the transfer - only connect to host */
curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1L);
res = curl_easy_perform(curl);
/* Extract the socket from the curl handle */
res = curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, &sockfd);
if(res != CURLE_OK) {
printf("Error: %s\\n", curl_easy_strerror(res));
return 1;
}
}
}
.fi
.SH AVAILABILITY
Added in 7.15.2
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_ACTIVESOCKET (3),
.BR CURLOPT_CONNECT_ONLY (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_LOCAL_IP 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_LOCAL_IP \- get local IP address of last connection
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_IP, char **ip);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the IP address of the local end of most recent connection done
with this \fBcurl\fP handle. This string may be IPv6 when that is
enabled. Note that you get a pointer to a memory area that is reused at next
request so you need to copy the string if you want to keep the information.
The \fBip\fP pointer is NULL or points to private memory. You MUST NOT free -
it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
char *ip;
CURLcode res;
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the transfer */
res = curl_easy_perform(curl);
/* Check for errors */
if((res == CURLE_OK) &&
!curl_easy_getinfo(curl, CURLINFO_LOCAL_IP, &ip) && ip) {
printf("Local IP: %s\\n", ip);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
.fi
.SH AVAILABILITY
Added in 7.21.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_PRIMARY_IP (3),
.BR CURLINFO_LOCAL_PORT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_LOCAL_PORT 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_LOCAL_PORT \- get the latest local port number
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the local port number of the most recent
connection done with this \fBcurl\fP handle.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
long port;
res = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port);
if(CURLE_OK == res) {
printf("We used local port: %ld\\n", port);
}
}
curl_easy_cleanup(curl);
}
return 0;
}
.fi
.SH AVAILABILITY
Added in 7.21.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_LOCAL_IP (3),
.BR CURLINFO_PRIMARY_PORT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_NAMELOOKUP_TIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_NAMELOOKUP_TIME \- get the name lookup time
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NAMELOOKUP_TIME,
double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total time in seconds from the start
until the name resolving was completed.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double namelookup;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_NAMELOOKUP_TIME, &namelookup);
if(CURLE_OK == res) {
printf("Time: %.1f", namelookup);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_NAMELOOKUP_TIME_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_NAMELOOKUP_TIME_T 3 "28 Apr 2018" libcurl libcurl
.SH NAME
CURLINFO_NAMELOOKUP_TIME_T \- get the name lookup time in microseconds
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NAMELOOKUP_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the total time in microseconds
from the start until the name resolving was completed.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t namelookup;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_NAMELOOKUP_TIME_T, &namelookup);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", namelookup / 1000000,
(long)(namelookup % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_NAMELOOKUP_TIME (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_NUM_CONNECTS 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_NUM_CONNECTS \- get number of created connections
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NUM_CONNECTS, long *nump);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive how many new connections libcurl had to
create to achieve the previous transfer (only the successful connects are
counted). Combined with \fICURLINFO_REDIRECT_COUNT(3)\fP you are able to know
how many times libcurl successfully reused existing connection(s) or not. See
the connection options of \fIcurl_easy_setopt(3)\fP to see how libcurl tries
to make persistent connections to save time.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long connects;
res = curl_easy_getinfo(curl, CURLINFO_NUM_CONNECTS, &connects);
if(res)
printf("It needed %ld connects\\n", connects);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.12.3
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_OS_ERRNO 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_OS_ERRNO \- get errno number from last connect failure
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_OS_ERRNO, long *errnop);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the errno variable from a connect failure.
Note that the value is only set on failure, it is not reset upon a successful
operation. The number is OS and system specific.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res != CURLE_OK) {
long error;
res = curl_easy_getinfo(curl, CURLINFO_OS_ERRNO, &error);
if(res && error) {
printf("Errno: %ld\\n", error);
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.12.2
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PRETRANSFER_TIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_PRETRANSFER_TIME \- get the time until the file transfer start
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRETRANSFER_TIME,
double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the time, in seconds, it took from the
start until the file transfer is just about to begin.
This time-stamp includes all pre-transfer commands and negotiations that are
specific to the particular protocol(s) involved. It includes the sending of
the protocol-specific instructions that trigger a transfer.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double pretransfer;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME, &pretransfer);
if(CURLE_OK == res) {
printf("Time: %.1f", pretransfer);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONNECT_TIME_T (3),
.BR CURLINFO_PRETRANSFER_TIME_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PRETRANSFER_TIME_T 3 "28 Apr 2018" libcurl libcurl
.SH NAME
CURLINFO_PRETRANSFER_TIME_T \- get the time until the file transfer start
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRETRANSFER_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the time, in microseconds, it took
from the start until the file transfer is just about to begin.
This time-stamp includes all pre-transfer commands and negotiations that are
specific to the particular protocol(s) involved. It includes the sending of
the protocol-specific instructions that trigger a transfer.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t pretransfer;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME_T, &pretransfer);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld\\n",
pretransfer / 1000000,
(long)(pretransfer % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONNECT_TIME (3),
.BR CURLINFO_PRETRANSFER_TIME_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PRIMARY_IP 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_PRIMARY_IP \- get IP address of last connection
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIMARY_IP, char **ip);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the IP address of the most recent connection done with this
\fBcurl\fP handle. This string may be IPv6 when that is enabled. Note that you
get a pointer to a memory area that is reused at next request so you need to
copy the string if you want to keep the information.
The \fBip\fP pointer is NULL or points to private memory. You MUST NOT free -
it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
All network based ones
.SH EXAMPLE
.nf
int main(void)
{
char *ip;
CURLcode res;
CURL *curl = curl_easy_init();
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the transfer */
res = curl_easy_perform(curl);
/* Check for errors */
if((res == CURLE_OK) &&
!curl_easy_getinfo(curl, CURLINFO_PRIMARY_IP, &ip) && ip) {
printf("IP: %s\\n", ip);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
.fi
.SH AVAILABILITY
Added in 7.19.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_LOCAL_IP (3),
.BR CURLINFO_LOCAL_PORT (3),
.BR CURLINFO_PRIMARY_PORT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PRIMARY_PORT 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_PRIMARY_PORT \- get the latest destination port number
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIMARY_PORT, long *portp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the destination port of the most recent
connection done with this \fBcurl\fP handle.
This is the destination port of the actual TCP or UDP connection libcurl used.
If a proxy was used for the most recent transfer, this is the port number of
the proxy, if no proxy was used it is the port number of the most recently
accessed URL.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long port;
res = curl_easy_getinfo(curl, CURLINFO_PRIMARY_PORT, &port);
if(!res)
printf("Connected to remote port: %ld\\n", port);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.21.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_LOCAL_PORT (3),
.BR CURLINFO_PRIMARY_IP (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PRIVATE 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_PRIVATE \- get the private pointer
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRIVATE, char **private);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to the private data
associated with the curl handle (set with the \fICURLOPT_PRIVATE(3)\fP).
Please note that for internal reasons, the value is returned as a char
pointer, although effectively being a 'void *'.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
void *pointer = (void *)0x2345454;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
/* set the private pointer */
curl_easy_setopt(curl, CURLOPT_PRIVATE, pointer);
res = curl_easy_perform(curl);
/* extract the private pointer again */
res = curl_easy_getinfo(curl, CURLINFO_PRIVATE, &pointer);
if(res)
printf("error: %s\\n", curl_easy_strerror(res));
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.10.3
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_PRIVATE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PROTOCOL 3 "23 November 2016" libcurl libcurl
.SH NAME
CURLINFO_PROTOCOL \- get the protocol used in the connection
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROTOCOL, long *p);
.fi
.SH DESCRIPTION
This option is deprecated. We strongly recommend using
\fICURLINFO_SCHEME(3)\fP instead, because this option cannot return all
possible protocols!
Pass a pointer to a long to receive the version used in the last http
connection. The returned value is set to one of the CURLPROTO_* values:
.nf
CURLPROTO_DICT, CURLPROTO_FILE, CURLPROTO_FTP, CURLPROTO_FTPS,
CURLPROTO_GOPHER, CURLPROTO_HTTP, CURLPROTO_HTTPS, CURLPROTO_IMAP,
CURLPROTO_IMAPS, CURLPROTO_LDAP, CURLPROTO_LDAPS, CURLPROTO_POP3,
CURLPROTO_POP3S, CURLPROTO_RTMP, CURLPROTO_RTMPE, CURLPROTO_RTMPS,
CURLPROTO_RTMPT, CURLPROTO_RTMPTE, CURLPROTO_RTMPTS, CURLPROTO_RTSP,
CURLPROTO_SCP, CURLPROTO_SFTP, CURLPROTO_SMB, CURLPROTO_SMBS, CURLPROTO_SMTP,
CURLPROTO_SMTPS, CURLPROTO_TELNET, CURLPROTO_TFTP, CURLPROTO_MQTT
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long protocol;
curl_easy_getinfo(curl, CURLINFO_PROTOCOL, &protocol);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.52.0. Deprecated since 7.85.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RESPONSE_CODE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PROXYAUTH_AVAIL 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_PROXYAUTH_AVAIL \- get available HTTP proxy authentication methods
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXYAUTH_AVAIL,
long *authp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive a bitmask indicating the authentication
method(s) available according to the previous response. The meaning of the
bits is explained in the \fICURLOPT_PROXYAUTH(3)\fP option for
\fIcurl_easy_setopt(3)\fP.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_PROXY, "http://127.0.0.1:80");
res = curl_easy_perform(curl);
if(!res) {
/* extract the available proxy authentication types */
long auth;
res = curl_easy_getinfo(curl, CURLINFO_PROXYAUTH_AVAIL, &auth);
if(!res) {
if(!auth)
printf("No proxy auth available, perhaps no 407?\\n");
else {
printf("%s%s%s%s\\n",
auth & CURLAUTH_BASIC ? "Basic ":"",
auth & CURLAUTH_DIGEST ? "Digest ":"",
auth & CURLAUTH_NEGOTIATE ? "Negotiate ":"",
auth % CURLAUTH_NTLM ? "NTLM ":"");
}
}
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added RFC 2617 in 7.10.8
Added RFC 7616 in 7.57.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_HTTPAUTH_AVAIL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PROXY_ERROR 3 "3 Aug 2020" libcurl libcurl
.SH NAME
CURLINFO_PROXY_ERROR \- get the detailed (SOCKS) proxy error
.SH SYNOPSIS
.nf
#include <curl/curl.h>
typedef enum {
CURLPX_OK,
CURLPX_BAD_ADDRESS_TYPE,
CURLPX_BAD_VERSION,
CURLPX_CLOSED,
CURLPX_GSSAPI,
CURLPX_GSSAPI_PERMSG,
CURLPX_GSSAPI_PROTECTION,
CURLPX_IDENTD,
CURLPX_IDENTD_DIFFER,
CURLPX_LONG_HOSTNAME,
CURLPX_LONG_PASSWD,
CURLPX_LONG_USER,
CURLPX_NO_AUTH,
CURLPX_RECV_ADDRESS,
CURLPX_RECV_AUTH,
CURLPX_RECV_CONNECT,
CURLPX_RECV_REQACK,
CURLPX_REPLY_ADDRESS_TYPE_NOT_SUPPORTED,
CURLPX_REPLY_COMMAND_NOT_SUPPORTED,
CURLPX_REPLY_CONNECTION_REFUSED,
CURLPX_REPLY_GENERAL_SERVER_FAILURE,
CURLPX_REPLY_HOST_UNREACHABLE,
CURLPX_REPLY_NETWORK_UNREACHABLE,
CURLPX_REPLY_NOT_ALLOWED,
CURLPX_REPLY_TTL_EXPIRED,
CURLPX_REPLY_UNASSIGNED,
CURLPX_REQUEST_FAILED,
CURLPX_RESOLVE_HOST,
CURLPX_SEND_AUTH,
CURLPX_SEND_CONNECT,
CURLPX_SEND_REQUEST,
CURLPX_UNKNOWN_FAIL,
CURLPX_UNKNOWN_MODE,
CURLPX_USER_REJECTED,
CURLPX_LAST /* never use */
} CURLproxycode;
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXY_ERROR, long *detail);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive a detailed error code when the most recent
transfer returned a \fBCURLE_PROXY\fP error. That error code matches the
\fBCURLproxycode\fP set.
The error code is zero (\fBCURLPX_OK\fP) if no response code was available.
.SH PROTOCOLS
All that can be done over SOCKS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_PROXY, "socks5://127.0.0.1");
res = curl_easy_perform(curl);
if(res == CURLE_PROXY) {
long proxycode;
res = curl_easy_getinfo(curl, CURLINFO_PROXY_ERROR, &proxycode);
if(!res && proxycode)
printf("The detailed proxy error: %ld\\n", proxycode);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.73.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RESPONSE_CODE (3),
.BR libcurl-errors (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PROXY_SSL_VERIFYRESULT 3 "16 Nov 2016" libcurl libcurl
.SH NAME
CURLINFO_PROXY_SSL_VERIFYRESULT \- get the result of the proxy certificate verification
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXY_SSL_VERIFYRESULT,
long *result);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the result of the certificate verification
that was requested (using the \fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP
option. This is only used for HTTPS proxies.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
long verifyresult;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy:443");
res = curl_easy_perform(curl);
if(res)
printf("error: %s\\n", curl_easy_strerror(res));
curl_easy_getinfo(curl, CURLINFO_PROXY_SSL_VERIFYRESULT, &verifyresult);
printf("The peer verification said %s\\n", verifyresult?
"fine" : "bad");
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.52.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SSL_VERIFYRESULT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REDIRECT_COUNT 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_REDIRECT_COUNT \- get the number of redirects
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REDIRECT_COUNT,
long *countp);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the total number of redirections that were
actually followed.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long redirects;
curl_easy_getinfo(curl, CURLINFO_REDIRECT_COUNT, &redirects);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.9.7
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_REDIRECT_URL (3),
.BR CURLOPT_FOLLOWLOCATION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REDIRECT_TIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_REDIRECT_TIME \- get the time for all redirection steps
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REDIRECT_TIME,
double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total time, in seconds, it took for
all redirection steps include name lookup, connect, pretransfer and transfer
before final transaction was started. \fICURLINFO_REDIRECT_TIME(3)\fP contains
the complete execution time for multiple redirections.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double redirect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_REDIRECT_TIME, &redirect);
if(CURLE_OK == res) {
printf("Time: %.1f", redirect);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.9.7
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_REDIRECT_COUNT (3),
.BR CURLINFO_REDIRECT_TIME_T (3),
.BR CURLINFO_REDIRECT_URL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REDIRECT_TIME_T 3 "28 Apr 2018" libcurl libcurl
.SH NAME
CURLINFO_REDIRECT_TIME_T \- get the time for all redirection steps
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REDIRECT_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the total time, in microseconds, it
took for all redirection steps include name lookup, connect, pretransfer and
transfer before final transaction was started.
\fICURLINFO_REDIRECT_TIME_T(3)\fP holds the complete execution time for
multiple redirections.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t redirect;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_REDIRECT_TIME_T, &redirect);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", redirect / 1000000,
(long)(redirect % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_REDIRECT_COUNT (3),
.BR CURLINFO_REDIRECT_TIME (3),
.BR CURLINFO_REDIRECT_URL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REDIRECT_URL 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_REDIRECT_URL \- get the URL a redirect would go to
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REDIRECT_URL, char **urlp);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the URL a redirect \fIwould\fP
take you to if you would enable \fICURLOPT_FOLLOWLOCATION(3)\fP. This can come
handy if you think using the built-in libcurl redirect logic is not good enough
for you but you would still prefer to avoid implementing all the magic of
figuring out the new URL.
This URL is also set if the \fICURLOPT_MAXREDIRS(3)\fP limit prevented a
redirect to happen (since 7.54.1).
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *url = NULL;
curl_easy_getinfo(curl, CURLINFO_REDIRECT_URL, &url);
if(url)
printf("Redirect to: %s\\n", url);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.18.2
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_REDIRECT_COUNT (3),
.BR CURLINFO_REDIRECT_TIME_T (3),
.BR CURLOPT_FOLLOWLOCATION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REFERER 3 "11 Feb 2021" libcurl libcurl
.SH NAME
CURLINFO_REFERER \- get the referrer header
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REFERER, char **hdrp);
.fi
.SH DESCRIPTION
Pass in a pointer to a char pointer and get the referrer header.
The \fBhdrp\fP pointer is NULL or points to private memory you MUST NOT free -
it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_REFERER, "https://example.org/referrer");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *hdr = NULL;
curl_easy_getinfo(curl, CURLINFO_REFERER, &hdr);
if(hdr)
printf("Referrer header: %s\\n", hdr);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.76.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_header (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_REFERER (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_REQUEST_SIZE 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_REQUEST_SIZE \- get size of sent request
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_REQUEST_SIZE, long *sizep);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the total size of the issued
requests. This is so far only for HTTP requests. Note that this may be more
than one request if \fICURLOPT_FOLLOWLOCATION(3)\fP is enabled.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long req;
res = curl_easy_getinfo(curl, CURLINFO_REQUEST_SIZE, &req);
if(!res)
printf("Request size: %ld bytes\\n", req);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_HEADER_SIZE (3),
.BR CURLINFO_SIZE_DOWNLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RESPONSE_CODE 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_RESPONSE_CODE \- get the last response code
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RESPONSE_CODE, long *codep);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the last received HTTP, FTP, SMTP or LDAP
(OpenLDAP only) response code. This option was previously known as
CURLINFO_HTTP_CODE in libcurl 7.10.7 and earlier. The stored value is zero if
no server response code has been received.
Note that a proxy's CONNECT response should be read with
\fICURLINFO_HTTP_CONNECTCODE(3)\fP and not this.
.SH PROTOCOLS
HTTP, FTP, SMTP and LDAP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long response_code;
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.10.8. CURLINFO_HTTP_CODE was added in 7.4.1.
Support for SMTP responses added in 7.25.0, for OpenLDAP in 7.81.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_HTTP_CONNECTCODE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RETRY_AFTER 3 "6 Aug 2019" libcurl libcurl
.SH NAME
CURLINFO_RETRY_AFTER \- returns the Retry-After retry delay
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RETRY_AFTER,
curl_off_t *retry);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t variable to receive the number of seconds the
HTTP server suggests the client should wait until the next request is
issued. The information from the "Retry-After:" header.
While the HTTP header might contain a fixed date string, the
\fICURLINFO_RETRY_AFTER(3)\fP always returns the number of seconds to wait -
or zero if there was no header or the header could not be parsed.
.SH DEFAULT
Returns zero delay if there was no header.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
curl_off_t wait = 0;
curl_easy_getinfo(curl, CURLINFO_RETRY_AFTER, &wait);
if(wait)
printf("Wait for %" CURL_FORMAT_CURL_OFF_T " seconds\\n", wait);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.66.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_header (3),
.BR CURLOPT_HEADERFUNCTION (3),
.BR CURLOPT_STDERR (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RTSP_CLIENT_CSEQ 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_RTSP_CLIENT_CSEQ \- get the next RTSP client CSeq
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RTSP_CLIENT_CSEQ,
long *cseq);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the next CSeq that is expected to be used
by the application.
.SH PROTOCOLS
RTSP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "rtsp://rtsp.example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long cseq;
curl_easy_getinfo(curl, CURLINFO_RTSP_CLIENT_CSEQ, &cseq);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.20.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RTSP_CSEQ_RECV (3),
.BR CURLINFO_RTSP_SERVER_CSEQ (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RTSP_CSEQ_RECV 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_RTSP_CSEQ_RECV \- get the recently received CSeq
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RTSP_CSEQ_RECV, long *cseq);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the most recently received CSeq from the
server. If your application encounters a \fICURLE_RTSP_CSEQ_ERROR\fP then you
may wish to troubleshoot and/or fix the CSeq mismatch by peeking at this
value.
.SH PROTOCOLS
RTSP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "rtsp://rtsp.example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long cseq;
curl_easy_getinfo(curl, CURLINFO_RTSP_CSEQ_RECV, &cseq);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.20.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RTSP_SERVER_CSEQ (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RTSP_SERVER_CSEQ 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_RTSP_SERVER_CSEQ \- get the next RTSP server CSeq
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RTSP_SERVER_CSEQ,
long *cseq);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the next CSeq that is expected to be used
by the application.
Listening for server initiated requests is not implemented!
Applications wishing to resume an RTSP session on another connection should
retrieve this info before closing the active connection.
.SH PROTOCOLS
RTSP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "rtsp://rtsp.example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
long cseq;
curl_easy_getinfo(curl, CURLINFO_RTSP_SERVER_CSEQ, &cseq);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.20.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RTSP_CSEQ_RECV (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_RTSP_SESSION_ID 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_RTSP_SESSION_ID \- get RTSP session ID
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_RTSP_SESSION_ID, char **id);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive a pointer to a string holding the
most recent RTSP Session ID.
Applications wishing to resume an RTSP session on another connection should
retrieve this info before closing the active connection.
The \fBid\fP pointer is NULL or points to private memory. You MUST NOT free -
it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the corresponding
CURL handle.
.SH PROTOCOLS
RTSP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "rtsp://rtsp.example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *id;
curl_easy_getinfo(curl, CURLINFO_RTSP_SESSION_ID, &id);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.20.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_RTSP_CSEQ_RECV (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SCHEME 3 "23 November 2016" libcurl libcurl
.SH NAME
CURLINFO_SCHEME \- get the URL scheme (sometimes called protocol) used in the connection
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SCHEME, char **scheme);
.fi
.SH DESCRIPTION
Pass a pointer to a char pointer to receive the pointer to a null-terminated
string holding the URL scheme used for the most recent connection done with
this CURL \fBhandle\fP.
The \fBscheme\fP pointer is NULL or points to private memory. You MUST NOT
free - it gets freed when you call \fIcurl_easy_cleanup(3)\fP on the
corresponding CURL handle.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res == CURLE_OK) {
char *scheme = NULL;
curl_easy_getinfo(curl, CURLINFO_SCHEME, &scheme);
if(scheme)
printf("scheme: %s\\n", scheme); /* scheme: HTTP */
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.52.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_EFFECTIVE_URL (3),
.BR CURLINFO_PROTOCOL (3),
.BR CURLINFO_RESPONSE_CODE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SIZE_DOWNLOAD 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_SIZE_DOWNLOAD \- get the number of downloaded bytes
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SIZE_DOWNLOAD, double *dlp);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total amount of bytes that were
downloaded. The amount is only for the latest transfer and gets reset again
for each new transfer. This counts actual payload data, what's also commonly
called body. All meta and header data is excluded and not included in this
number.
\fICURLINFO_SIZE_DOWNLOAD_T(3)\fP is a newer replacement that returns a more
sensible variable type.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
double dl;
res = curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &dl);
if(!res) {
printf("Downloaded %.0f bytes\\n", dl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_DOWNLOAD_T (3),
.BR CURLINFO_SIZE_UPLOAD_T (3),
.BR CURLOPT_MAXFILESIZE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SIZE_DOWNLOAD_T 3 "25 May 2017" libcurl libcurl
.SH NAME
CURLINFO_SIZE_DOWNLOAD_T \- get the number of downloaded bytes
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SIZE_DOWNLOAD_T,
curl_off_t *dlp);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the total amount of bytes that
were downloaded. The amount is only for the latest transfer and gets reset
again for each new transfer. This counts actual payload data, what's also
commonly called body. All meta and header data is excluded from this amount.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
/* check the size */
curl_off_t dl;
res = curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD_T, &dl);
if(!res) {
printf("Downloaded %" CURL_FORMAT_CURL_OFF_T " bytes\\n", dl);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_DOWNLOAD (3),
.BR CURLINFO_SIZE_UPLOAD_T (3),
.BR CURLOPT_MAXFILESIZE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SIZE_UPLOAD 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_SIZE_UPLOAD \- get the number of uploaded bytes
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SIZE_UPLOAD,
double *uploadp);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total amount of bytes that were
uploaded.
\fICURLINFO_SIZE_UPLOAD_T(3)\fP is a newer replacement that returns a more
sensible variable type.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
double ul;
res = curl_easy_getinfo(curl, CURLINFO_SIZE_UPLOAD, &ul);
if(!res) {
printf("Uploaded %.0f bytes\\n", ul);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_DOWNLOAD_T (3),
.BR CURLINFO_SIZE_UPLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SIZE_UPLOAD_T 3 "25 May 2017" libcurl libcurl
.SH NAME
CURLINFO_SIZE_UPLOAD_T \- get the number of uploaded bytes
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SIZE_UPLOAD_T,
curl_off_t *uploadp);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the total amount of bytes that
were uploaded.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
curl_off_t ul;
res = curl_easy_getinfo(curl, CURLINFO_SIZE_UPLOAD_T, &ul);
if(!res) {
printf("Uploaded %" CURL_FORMAT_CURL_OFF_T " bytes\\n", ul);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_DOWNLOAD_T (3),
.BR CURLINFO_SIZE_UPLOAD (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SPEED_DOWNLOAD 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_SPEED_DOWNLOAD \- get download speed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_DOWNLOAD,
double *speed);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the average download speed that curl
measured for the complete download. Measured in bytes/second.
\fICURLINFO_SPEED_DOWNLOAD_T(3)\fP is a newer replacement that returns a more
sensible variable type.
.SH PROTOCOLS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
double speed;
res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD, &speed);
if(!res) {
printf("Download speed %.0f bytes/sec\\n", speed);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_UPLOAD_T (3),
.BR CURLINFO_SPEED_UPLOAD (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SPEED_DOWNLOAD_T 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_SPEED_DOWNLOAD_T \- get download speed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_DOWNLOAD_T,
curl_off_t *speed);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the average download speed
that curl measured for the complete download. Measured in bytes/second.
.SH PROTOCOLS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
curl_off_t speed;
res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD_T, &speed);
if(!res) {
printf("Download speed %" CURL_FORMAT_CURL_OFF_T " bytes/sec\\n",
speed);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SIZE_UPLOAD_T (3),
.BR CURLINFO_SPEED_UPLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SPEED_UPLOAD 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_SPEED_UPLOAD \- get upload speed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_UPLOAD, double *speed);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the average upload speed that curl
measured for the complete upload. Measured in bytes/second.
\fICURLINFO_SPEED_UPLOAD_T(3)\fP is a newer replacement that returns a more
sensible variable type.
.SH PROTOCOLS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
double speed;
res = curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD, &speed);
if(!res) {
printf("Upload speed %.0f bytes/sec\\n", speed);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1. Deprecated since 7.55.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SPEED_DOWNLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SPEED_UPLOAD_T 3 "25 May 2017" libcurl libcurl
.SH NAME
CURLINFO_SPEED_UPLOAD_T \- get upload speed
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_UPLOAD_T,
curl_off_t *speed);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the average upload speed that
curl measured for the complete upload. Measured in bytes/second.
.SH PROTOCOLS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
curl_off_t speed;
res = curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD_T, &speed);
if(!res) {
printf("Upload speed %" CURL_FORMAT_CURL_OFF_T " bytes/sec\\n", speed);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 7.55.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_SPEED_DOWNLOAD_T (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SSL_ENGINES 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_SSL_ENGINES \- get an slist of OpenSSL crypto-engines
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_ENGINES,
struct curl_slist **engine_list);
.fi
.SH DESCRIPTION
Pass the address of a 'struct curl_slist *' to receive a linked-list of
OpenSSL crypto-engines supported. Note that engines are normally implemented
in separate dynamic libraries. Hence not all the returned engines may be
available at runtime. \fBNOTE:\fP you must call \fIcurl_slist_free_all(3)\fP
on the list pointer once you are done with it, as libcurl does not free this
data for you.
.SH PROTOCOLS
All TLS based ones.
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
struct curl_slist *engines;
res = curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines);
if((res == CURLE_OK) && engines) {
/* we have a list, free it when done using it */
curl_slist_free_all(engines);
}
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.12.3. Available in OpenSSL builds with "engine" support.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLOPT_SSLENGINE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_SSL_VERIFYRESULT 3 "1 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_SSL_VERIFYRESULT \- get the result of the certificate verification
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SSL_VERIFYRESULT,
long *result);
.fi
.SH DESCRIPTION
Pass a pointer to a long to receive the result of the server SSL certificate
verification that was requested (using the \fICURLOPT_SSL_VERIFYPEER(3)\fP
option).
0 is a positive result. Non-zero is an error.
.SH PROTOCOLS
All using TLS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
long verifyresult;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res)
printf("error: %s\\n", curl_easy_strerror(res));
curl_easy_getinfo(curl, CURLINFO_SSL_VERIFYRESULT, &verifyresult);
printf("The peer verification said %s\\n", verifyresult?
"BAAAD":"fine");
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.5. Only set by the OpenSSL/libressl/boringssl and GnuTLS backends.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_PROXY_SSL_VERIFYRESULT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_STARTTRANSFER_TIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_STARTTRANSFER_TIME \- get the time until the first byte is received
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_STARTTRANSFER_TIME,
double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the time, in seconds, it took from the
start until the first byte is received by libcurl. This includes
\fICURLINFO_PRETRANSFER_TIME(3)\fP and also the time the server needs to
calculate the result.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double start;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME, &start);
if(CURLE_OK == res) {
printf("Time: %.1f", start);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.9.2
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_STARTTRANSFER_TIME_T (3),
.BR CURLOPT_TIMEOUT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_STARTTRANSFER_TIME_T 3 "28 Apr 2018" libcurl libcurl
.SH NAME
CURLINFO_STARTTRANSFER_TIME_T \- get the time until the first byte is received
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_STARTTRANSFER_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the time, in microseconds,
it took from the
start until the first byte is received by libcurl. This includes
\fICURLINFO_PRETRANSFER_TIME_T(3)\fP and also the time the server needs to
calculate the result.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t start;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME_T, &start);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", start / 1000000,
(long)(start % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_STARTTRANSFER_TIME (3),
.BR CURLOPT_TIMEOUT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_TLS_SESSION 3 "12 Sep 2015" libcurl libcurl
.SH NAME
CURLINFO_TLS_SESSION \- get TLS session info
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
struct curl_tlssessioninfo **session);
.SH DESCRIPTION
\fBThis option has been superseded\fP by \fICURLINFO_TLS_SSL_PTR(3)\fP which
was added in 7.48.0. The only reason you would use this option instead is if
you could be using a version of libcurl earlier than 7.48.0.
This option is exactly the same as \fICURLINFO_TLS_SSL_PTR(3)\fP except in the
case of OpenSSL. If the session \fIbackend\fP is CURLSSLBACKEND_OPENSSL the
session \fIinternals\fP pointer varies depending on the option:
\fICURLINFO_TLS_SESSION(3)\fP OpenSSL session \fIinternals\fP is \fBSSL_CTX *\fP.
\fICURLINFO_TLS_SSL_PTR(3)\fP OpenSSL session \fIinternals\fP is \fBSSL *\fP.
You can obtain an \fBSSL_CTX\fP pointer from an SSL pointer using OpenSSL
function \fISSL_get_SSL_CTX(3)\fP. Therefore unless you need compatibility
with older versions of libcurl use \fICURLINFO_TLS_SSL_PTR(3)\fP. Refer to
that document for more information.
.SH PROTOCOLS
All TLS-based
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
struct curl_tlssessioninfo *tls;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(res)
printf("error: %s\\n", curl_easy_strerror(res));
curl_easy_getinfo(curl, CURLINFO_TLS_SESSION, &tls);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.34.0. Deprecated since 7.48.0 and supported OpenSSL, GnuTLS, and
NSS only up until this version was released.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_TLS_SSL_PTR (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_TLS_SSL_PTR 3 "23 Feb 2016" libcurl libcurl
.SH NAME
CURLINFO_TLS_SESSION, CURLINFO_TLS_SSL_PTR \- get TLS session info
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SSL_PTR,
struct curl_tlssessioninfo **session);
/* if you need compatibility with libcurl < 7.48.0 use
CURLINFO_TLS_SESSION instead: */
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TLS_SESSION,
struct curl_tlssessioninfo **session);
.SH DESCRIPTION
Pass a pointer to a \fIstruct curl_tlssessioninfo *\fP. The pointer is
initialized to refer to a \fIstruct curl_tlssessioninfo *\fP that contains an
enum indicating the SSL library used for the handshake and a pointer to the
respective internal TLS session structure of this underlying SSL library.
This option may be useful for example to extract certificate information in a
format convenient for further processing, such as manual validation. Refer to
the \fBLIMITATIONS\fP section.
.nf
struct curl_tlssessioninfo {
curl_sslbackend backend;
void *internals;
};
.fi
The \fIbackend\fP struct member is one of the defines in the CURLSSLBACKEND_*
series: CURLSSLBACKEND_NONE (when built without TLS support),
CURLSSLBACKEND_WOLFSSL, CURLSSLBACKEND_SECURETRANSPORT, CURLSSLBACKEND_GNUTLS,
CURLSSLBACKEND_MBEDTLS, CURLSSLBACKEND_NSS, CURLSSLBACKEND_OPENSSL,
CURLSSLBACKEND_SCHANNEL or CURLSSLBACKEND_MESALINK. (Note that the OpenSSL
forks are all reported as just OpenSSL here.)
The \fIinternals\fP struct member points to a TLS library specific pointer for
the active ("in use") SSL connection, with the following underlying types:
.RS
.IP GnuTLS
\fBgnutls_session_t\fP
.IP NSS
\fBPRFileDesc *\fP
.IP OpenSSL
\fICURLINFO_TLS_SESSION(3)\fP: \fBSSL_CTX *\fP
\fICURLINFO_TLS_SSL_PTR(3)\fP: \fBSSL *\fP
.RE
Since 7.48.0 the \fIinternals\fP member can point to these other SSL backends
as well:
.RS
.IP mbedTLS
\fBmbedTLS_ssl_context *\fP
.IP "Secure Channel"
\fBCtxtHandle *\fP
.IP "Secure Transport"
\fBSSLContext *\fP
.IP "wolfSSL"
\fBSSL *\fP
.RE
If the \fIinternals\fP pointer is NULL then either the SSL backend is not
supported, an SSL session has not yet been established or the connection is no
longer associated with the easy handle (e.g. \fIcurl_easy_perform(3)\fP has
returned).
.SH LIMITATIONS
This option has some limitations that could make it unsafe when it comes to
the manual verification of certificates.
This option only retrieves the first in-use SSL session pointer for your easy
handle, however your easy handle may have more than one in-use SSL session if
using FTP over SSL. That is because the FTP protocol has a control channel and
a data channel and one or both may be over SSL. Currently there is no way to
retrieve a second in-use SSL session associated with an easy handle.
This option has not been thoroughly tested with clear text protocols that can
be upgraded/downgraded to/from SSL: FTP, SMTP, POP3, IMAP when used with
\fICURLOPT_USE_SSL(3)\fP. Though you can to retrieve the SSL pointer, it's
possible that before you can do that, data (including auth) may have already
been sent over a connection after it was upgraded.
Renegotiation. If unsafe renegotiation or renegotiation in a way that the
certificate is allowed to change is allowed by your SSL library this may occur
and the certificate may change, and data may continue to be sent or received
after renegotiation but before you are able to get the (possibly) changed SSL
pointer, with the (possibly) changed certificate information.
Instead of using this option to poll for certificate changes use
\fICURLOPT_SSL_CTX_FUNCTION(3)\fP to set a verification callback, if supported.
That is safer and does not suffer from any of the problems above.
How are you using this option? Are you affected by any of these limitations?
Please let us know by making a comment at
https://github.com/curl/curl/issues/685
.SH PROTOCOLS
All TLS-based
.SH EXAMPLE
.nf
#include <curl/curl.h>
#include <openssl/ssl.h>
CURL *curl;
static size_t wf(void *ptr, size_t size, size_t nmemb, void *stream)
{
const struct curl_tlssessioninfo *info = NULL;
CURLcode res = curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &info);
if(info && !res) {
if(CURLSSLBACKEND_OPENSSL == info->backend) {
printf("OpenSSL ver. %s\\n", SSL_get_version((SSL*)info->internals));
}
}
return size * nmemb;
}
int main(int argc, char **argv)
{
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, wf);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
return res;
}
.fi
.SH AVAILABILITY
Added in 7.48.0.
This option supersedes \fICURLINFO_TLS_SESSION(3)\fP which was added in 7.34.0.
This option is exactly the same as that option except in the case of OpenSSL.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_TLS_SESSION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_TOTAL_TIME 3 "28 Aug 2015" libcurl libcurl
.SH NAME
CURLINFO_TOTAL_TIME \- get total time of previous transfer
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TOTAL_TIME, double *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a double to receive the total time in seconds for the
previous transfer, including name resolving, TCP connect etc. The double
represents the time in seconds, including fractions.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
double total;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &total);
if(CURLE_OK == res) {
printf("Time: %.1f", total);
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.4.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_TOTAL_TIME_T (3),
.BR CURLOPT_TIMEOUT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_TOTAL_TIME_T 3 "28 Apr 2018" libcurl libcurl
.SH NAME
CURLINFO_TOTAL_TIME_T \- get total time of previous transfer in microseconds
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_TOTAL_TIME_T,
curl_off_t *timep);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_off_t to receive the total time in microseconds
for the previous transfer, including name resolving, TCP connect etc.
The curl_off_t represents the time in microseconds.
When a redirect is followed, the time from each request is added together.
See also the TIMES overview in the \fIcurl_easy_getinfo(3)\fP man page.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_off_t total;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
res = curl_easy_perform(curl);
if(CURLE_OK == res) {
res = curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME_T, &total);
if(CURLE_OK == res) {
printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", total / 1000000,
(long)(total % 1000000));
}
}
/* always cleanup */
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.61.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_TOTAL_TIME (3),
.BR CURLOPT_TIMEOUT (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_XFER_ID 3 "07 June 2023" "libcurl" "libcurl"
.SH NAME
CURLINFO_XFER_ID \- get the ID of a transfer
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_XFER_ID,
curl_off_t *xfer_id);
.fi
.SH DESCRIPTION
Pass a pointer to a \fIcurl_off_t\fP to receive the identifier of the
current/last transfer done with the handle. Stores -1 if no transfer
has been started yet for the handle.
The transfer id is unique among all transfers performed using the same
connection cache. This is implicitly the case for all transfers in the
same multi handle.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Perform the request */
res = curl_easy_perform(curl);
if(!res) {
curl_off_t xfer_id;
res = curl_easy_getinfo(curl, CURLINFO_XFER_ID, &xfer_id);
if(!res) {
printf("Transfer ID: %" CURL_FORMAT_CURL_OFF_T "\\n", xfer_id);
}
}
}
}
.fi
.SH AVAILABILITY
Added in 8.2.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo (3),
.BR curl_easy_setopt (3),
.BR CURLINFO_CONN_ID (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE \- chunk length threshold for pipelining
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE,
long size);
.fi
.SH DESCRIPTION
No function since pipelining was removed in 7.62.0.
Pass a long with a \fBsize\fP in bytes. If a transfer in a pipeline is
currently processing a chunked (Transfer-encoding: chunked) request with a
current chunk length larger than \fICURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3)\fP,
that pipeline is not considered for additional requests, even if it is shorter
than \fICURLMOPT_MAX_PIPELINE_LENGTH(3)\fP.
.SH DEFAULT
The default value is 0, which means that the penalization is inactive.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
long maxchunk = 10000;
curl_multi_setopt(m, CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE, maxchunk);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE (3),
.BR CURLMOPT_MAX_PIPELINE_LENGTH (3),
.BR CURLMOPT_PIPELINING (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE \- size threshold for pipelining penalty
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE,
long size);
.fi
.SH DESCRIPTION
No function since pipelining was removed in 7.62.0.
Pass a long with a \fBsize\fP in bytes. If a transfer in a pipeline is
currently processing a request with a Content-Length larger than this
\fICURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3)\fP, that pipeline is not considered
for additional requests, even if it is shorter than
\fICURLMOPT_MAX_PIPELINE_LENGTH(3)\fP.
.SH DEFAULT
The default value is 0, which means that the size penalization is inactive.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
long maxlength = 10000;
curl_multi_setopt(m, CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE, maxlength);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PIPELINING (3),
.BR CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_MAXCONNECTS 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLMOPT_MAXCONNECTS \- size of connection cache
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAXCONNECTS, long max);
.fi
.SH DESCRIPTION
Pass a long indicating the \fBmax\fP. The set number is used as the maximum
amount of simultaneously open connections that libcurl may keep in its
connection cache after completed use. By default libcurl enlarges the size for
each added easy handle to make it fit 4 times the number of added easy
handles.
By setting this option, you can prevent the cache size from growing beyond the
limit set by you.
When the cache is full, curl closes the oldest one in the cache to prevent the
number of open connections from increasing.
This option is for the multi handle's use only, when using the easy interface
you should instead use the \fICURLOPT_MAXCONNECTS(3)\fP option.
See \fICURLMOPT_MAX_TOTAL_CONNECTIONS(3)\fP for limiting the number of active
connections.
.SH DEFAULT
See DESCRIPTION
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* only keep 10 connections in the cache */
curl_multi_setopt(m, CURLMOPT_MAXCONNECTS, 10L);
}
.fi
.SH AVAILABILITY
Added in 7.16.3
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_MAX_HOST_CONNECTIONS (3),
.BR CURLOPT_MAXCONNECTS (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_MAX_CONCURRENT_STREAMS 3 "06 Nov 2019" libcurl libcurl
.SH NAME
CURLMOPT_MAX_CONCURRENT_STREAMS \- max concurrent streams for http2
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_CONCURRENT_STREAMS,
long max);
.fi
.SH DESCRIPTION
Pass a long indicating the \fBmax\fP. The set number is used as the maximum
number of concurrent streams libcurl should support on connections done using
HTTP/2 or HTTP/3.
Valid values range from 1 to 2147483647 (2^31 - 1) and defaults to 100. The
value passed here would be honored based on other system resources properties.
.SH DEFAULT
100
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* max concurrent streams 200 */
curl_multi_setopt(m, CURLMOPT_MAX_CONCURRENT_STREAMS, 200L);
}
.fi
.SH AVAILABILITY
Added in 7.67.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_MAXCONNECTS (3),
.BR CURLOPT_MAXCONNECTS (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_MAX_HOST_CONNECTIONS 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLMOPT_MAX_HOST_CONNECTIONS \- max number of connections to a single host
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_HOST_CONNECTIONS,
long max);
.fi
.SH DESCRIPTION
Pass a long to indicate \fBmax\fP. The set number is used as the maximum
amount of simultaneously open connections to a single host (a host being the
same as a host name + port number pair). For each new session to a host,
libcurl might open a new connection up to the limit set by
\fICURLMOPT_MAX_HOST_CONNECTIONS(3)\fP. When the limit is reached, new
sessions are kept pending until a connection becomes available.
The default \fBmax\fP value is 0, unlimited. This set limit is also used for
proxy connections, and then the proxy is considered to be the host for which
this limit counts.
When more transfers are added to the multi handle than what can be performed
due to the set limit, they are queued up waiting for their chance. When that
happens, the \fICURLOPT_TIMEOUT_MS(3)\fP timeout is inclusive of the waiting
time, meaning that if you set a too narrow timeout in such a case the transfer
might never even start before it times out.
Even in the queued up situation, the \fICURLOPT_CONNECTTIMEOUT_MS(3)\fP
timeout is however treated as a per-connect timeout.
.SH DEFAULT
0
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* do no more than 2 connections per host */
curl_multi_setopt(m, CURLMOPT_MAX_HOST_CONNECTIONS, 2L);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_MAXCONNECTS (3),
.BR CURLMOPT_MAX_TOTAL_CONNECTIONS (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_MAX_PIPELINE_LENGTH 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_MAX_PIPELINE_LENGTH \- maximum number of requests in a pipeline
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_PIPELINE_LENGTH,
long max);
.fi
.SH DESCRIPTION
No function since pipelining was removed in 7.62.0.
Pass a long. The set \fBmax\fP number is used as the maximum amount of
outstanding requests in an HTTP/1.1 pipeline. This option is only used for
HTTP/1.1 pipelining, not for HTTP/2 multiplexing.
When this limit is reached, libcurl creates another connection to the same
host (see \fICURLMOPT_MAX_HOST_CONNECTIONS(3)\fP), or queue the request until
one of the pipelines to the host is ready to accept a request. Thus, the
total number of requests in-flight is \fICURLMOPT_MAX_HOST_CONNECTIONS(3)\fP *
\fICURLMOPT_MAX_PIPELINE_LENGTH(3)\fP.
.SH DEFAULT
5
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* set a more conservative pipe length */
curl_multi_setopt(m, CURLMOPT_MAX_PIPELINE_LENGTH, 3L);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PIPELINING (3),
.BR CURLMOPT_MAX_HOST_CONNECTIONS (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_MAX_TOTAL_CONNECTIONS 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_MAX_TOTAL_CONNECTIONS \- max simultaneously open connections
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS,
long amount);
.fi
.SH DESCRIPTION
Pass a long for the \fBamount\fP. The set number is used as the maximum number
of simultaneously open connections in total using this multi handle. For each
new session, libcurl might open a new connection up to the limit set by
\fICURLMOPT_MAX_TOTAL_CONNECTIONS(3)\fP. When the limit is reached, new
sessions are held pending until there are available connections. If
\fICURLMOPT_PIPELINING(3)\fP is enabled, libcurl can try multiplexing if the
host is capable of it.
When more transfers are added to the multi handle than what can be performed
due to the set limit, they get queued up waiting for their chance. When that
happens, the \fICURLOPT_TIMEOUT_MS(3)\fP timeout is counted inclusive of the
waiting time, meaning that if you set a too narrow timeout in such a case the
transfer might never even start before it times out.
Even in the queued up situation, the \fICURLOPT_CONNECTTIMEOUT_MS(3)\fP
timeout is however treated as a per-connect timeout.
.SH DEFAULT
The default value is 0, which means that there is no limit. It is then simply
controlled by the number of easy handles added.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* never do more than 15 connections */
curl_multi_setopt(m, CURLMOPT_MAX_TOTAL_CONNECTIONS, 15L);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_MAXCONNECTS (3),
.BR CURLMOPT_MAX_HOST_CONNECTIONS (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_PIPELINING 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLMOPT_PIPELINING \- enable HTTP pipelining and multiplexing
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING, long bitmask);
.fi
.SH DESCRIPTION
Pass in the correct value in the \fBbitmask\fP parameter to instruct libcurl
to enable multiplexing for this multi handle.
With multiplexing enabled, libcurl attempts to do multiple transfers over the
same connection when doing parallel transfers to the same hosts.
.IP CURLPIPE_NOTHING (0)
Default, which means doing no attempts at multiplexing.
.IP CURLPIPE_HTTP1 (1)
This bit is deprecated and has no effect since version 7.62.0.
.IP CURLPIPE_MULTIPLEX (2)
If this bit is set, libcurl tries to multiplex the new transfer over an
existing connection if possible. This requires HTTP/2 or HTTP/3.
.SH DEFAULT
Since 7.62.0, \fBCURLPIPE_MULTIPLEX\fP is enabled by default.
Before that, default was \fBCURLPIPE_NOTHING\fP.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
int main(void)
{
CURLM *m = curl_multi_init();
/* try HTTP/2 multiplexing */
curl_multi_setopt(m, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
}
.fi
.SH AVAILABILITY
Added in 7.16.0. Multiplex support bit added in 7.43.0. HTTP/1 Pipelining
support was disabled in 7.62.0.
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE (3),
.BR CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE (3),
.BR CURLMOPT_MAX_HOST_CONNECTIONS (3),
.BR CURLMOPT_MAX_PIPELINE_LENGTH (3),
.BR CURLMOPT_MAXCONNECTS (3),
.BR CURLMOPT_PIPELINING_SITE_BL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_PIPELINING_SERVER_BL 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_PIPELINING_SERVER_BL \- pipelining server block list
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING_SERVER_BL,
char **servers);
.fi
.SH DESCRIPTION
No function since pipelining was removed in 7.62.0.
Pass a \fBservers\fP array of char *, ending with a NULL entry. This is a list
of server types prefixes (in the Server: HTTP header) that are blocked from
pipelining, i.e server types that are known to not support HTTP
pipelining. The array is copied by libcurl.
Note that the comparison matches if the Server: header begins with the string
in the block list, i.e "Server: Ninja 1.2.3" and "Server: Ninja 1.4.0" can
both be blocked by having "Ninja" in the list.
Pass a NULL pointer to clear the block list.
.SH DEFAULT
The default value is NULL, which means that there is no block list.
.SH PROTOCOLS
.SH EXAMPLE
.nf
static char *server_block_list[] =
{
"Microsoft-IIS/6.0",
"nginx/0.8.54",
NULL
};
int main(void)
{
CURLM *m = curl_multi_init();
curl_multi_setopt(m, CURLMOPT_PIPELINING_SERVER_BL, server_block_list);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PIPELINING (3),
.BR CURLMOPT_PIPELINING_SITE_BL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_PIPELINING_SITE_BL 3 "4 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_PIPELINING_SITE_BL \- pipelining host block list
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING_SITE_BL,
char **hosts);
.fi
.SH DESCRIPTION
No function since pipelining was removed in 7.62.0.
Pass a \fBhosts\fP array of char *, ending with a NULL entry. This is a list
of sites that are blocked from pipelining, i.e sites that are known to not
support HTTP pipelining. The array is copied by libcurl.
Pass a NULL pointer to clear the block list.
.SH DEFAULT
The default value is NULL, which means that there is no block list.
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
static char *site_block_list[] =
{
"www.haxx.se",
"www.example.com:1234",
NULL
};
int main(void)
{
CURLM *m = curl_multi_init();
curl_multi_setopt(m, CURLMOPT_PIPELINING_SITE_BL, site_block_list);
}
.fi
.SH AVAILABILITY
Added in 7.30.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PIPELINING (3),
.BR CURLMOPT_PIPELINING_SERVER_BL (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_PUSHDATA 3 "1 Jun 2015" libcurl libcurl
.SH NAME
CURLMOPT_PUSHDATA \- pointer to pass to push callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PUSHDATA, void *pointer);
.fi
.SH DESCRIPTION
Set a \fIpointer\fP to pass as the last argument to the
\fICURLMOPT_PUSHFUNCTION(3)\fP callback. The pointer is not touched or used by
libcurl itself, only passed on to the callback function.
.SH DEFAULT
NULL
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
#include <string.h>
/* only allow pushes for file names starting with "push-" */
int push_callback(CURL *parent,
CURL *easy,
size_t num_headers,
struct curl_pushheaders *headers,
void *clientp)
{
char *headp;
int *transfers = (int *)clientp;
FILE *out;
headp = curl_pushheader_byname(headers, ":path");
if(headp && !strncmp(headp, "/push-", 6)) {
fprintf(stderr, "The PATH is %s\\n", headp);
/* save the push here */
out = fopen("pushed-stream", "wb");
/* write to this file */
curl_easy_setopt(easy, CURLOPT_WRITEDATA, out);
(*transfers)++; /* one more */
return CURL_PUSH_OK;
}
return CURL_PUSH_DENY;
}
int main(void)
{
int counter;
CURLM *multi = curl_multi_init();
curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_callback);
curl_multi_setopt(multi, CURLMOPT_PUSHDATA, &counter);
}
.fi
.SH AVAILABILITY
Added in 7.44.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PIPELINING (3),
.BR CURLMOPT_PUSHFUNCTION (3),
.BR CURLOPT_PIPEWAIT (3),
.BR RFC 7540

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_PUSHFUNCTION 3 "1 Jun 2015" libcurl libcurl
.SH NAME
CURLMOPT_PUSHFUNCTION \- callback that approves or denies server pushes
.SH SYNOPSIS
.nf
#include <curl/curl.h>
int curl_push_callback(CURL *parent,
CURL *easy,
size_t num_headers,
struct curl_pushheaders *headers,
void *clientp);
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PUSHFUNCTION,
curl_push_callback func);
.fi
.SH DESCRIPTION
This callback gets called when a new HTTP/2 stream is being pushed by the
server (using the PUSH_PROMISE frame). If no push callback is set, all offered
pushes are denied automatically.
.SH CALLBACK DESCRIPTION
The callback gets its arguments like this:
\fIparent\fP is the handle of the stream on which this push arrives. The new
handle has been duplicated from the parent, meaning that it has gotten all its
options inherited. It is then up to the application to alter any options if
desired.
\fIeasy\fP is a newly created handle that represents this upcoming transfer.
\fInum_headers\fP is the number of name+value pairs that was received and can
be accessed
\fIheaders\fP is a handle used to access push headers using the accessor
functions described below. This only accesses and provides the PUSH_PROMISE
headers, the normal response headers are provided in the header callback as
usual.
\fIclientp\fP is the pointer set with \fICURLMOPT_PUSHDATA(3)\fP
If the callback returns CURL_PUSH_OK, the new easy handle is added to the
multi handle, the callback must not do that by itself.
The callback can access PUSH_PROMISE headers with two accessor
functions. These functions can only be used from within this callback and they
can only access the PUSH_PROMISE headers: \fIcurl_pushheader_byname(3)\fP and
\fIcurl_pushheader_bynum(3)\fP. The normal response headers are passed to the
header callback for pushed streams just as for normal streams.
The header fields can also be accessed with \fIcurl_easy_header(3)\fP,
introduced in later libcurl versions.
.SH CALLBACK RETURN VALUE
.IP "CURL_PUSH_OK (0)"
The application has accepted the stream and it can now start receiving data,
the ownership of the CURL handle has been taken over by the application.
.IP "CURL_PUSH_DENY (1)"
The callback denies the stream and no data reaches the application, the easy
handle is destroyed by libcurl.
.IP "CURL_PUSH_ERROROUT (2)"
Returning this code rejects the pushed stream and returns an error back on the
parent stream making it get closed with an error. (Added in 7.72.0)
.IP *
All other return codes are reserved for future use.
.SH DEFAULT
NULL, no callback
.SH PROTOCOLS
HTTP(S) (HTTP/2 only)
.SH EXAMPLE
.nf
#include <string.h>
/* only allow pushes for file names starting with "push-" */
int push_callback(CURL *parent,
CURL *easy,
size_t num_headers,
struct curl_pushheaders *headers,
void *clientp)
{
char *headp;
int *transfers = (int *)clientp;
FILE *out;
headp = curl_pushheader_byname(headers, ":path");
if(headp && !strncmp(headp, "/push-", 6)) {
fprintf(stderr, "The PATH is %s\\n", headp);
/* save the push here */
out = fopen("pushed-stream", "wb");
/* write to this file */
curl_easy_setopt(easy, CURLOPT_WRITEDATA, out);
(*transfers)++; /* one more */
return CURL_PUSH_OK;
}
return CURL_PUSH_DENY;
}
int main(void)
{
int counter;
CURLM *multi = curl_multi_init();
curl_multi_setopt(multi, CURLMOPT_PUSHFUNCTION, push_callback);
curl_multi_setopt(multi, CURLMOPT_PUSHDATA, &counter);
}
.fi
.SH AVAILABILITY
Added in 7.44.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_PUSHDATA (3),
.BR CURLMOPT_PIPELINING (3),
.BR CURLOPT_PIPEWAIT (3),
.BR RFC 7540

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_SOCKETDATA 3 "3 Nov 2014" libcurl libcurl
.SH NAME
CURLMOPT_SOCKETDATA \- custom pointer passed to the socket callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETDATA, void *pointer);
.SH DESCRIPTION
A data \fIpointer\fP to pass to the socket callback set with the
\fICURLMOPT_SOCKETFUNCTION(3)\fP option.
This pointer is not touched by libcurl but is only passed in as the socket
callbacks's \fBclientp\fP argument.
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
struct priv {
void *ours;
};
static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
{
struct priv *p = sockp;
printf("my ptr: %p\\n", p->ours);
if(what == CURL_POLL_REMOVE) {
/* remove the socket from our collection */
}
if(what & CURL_POLL_IN) {
/* wait for read on this socket */
}
if(what & CURL_POLL_OUT) {
/* wait for write on this socket */
}
return 0;
}
int main(void)
{
struct priv setup;
CURLM *multi = curl_multi_init();
/* ... use socket callback and custom pointer */
curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup);
}
.fi
.SH AVAILABILITY
Added in 7.15.4
.SH RETURN VALUE
Returns CURLM_OK.
.SH "SEE ALSO"
.BR curl_multi_socket_action (3),
.BR CURLMOPT_SOCKETFUNCTION (3),
.BR CURLMOPT_TIMERFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_SOCKETFUNCTION 3 "3 Nov 2016" libcurl libcurl
.SH NAME
CURLMOPT_SOCKETFUNCTION \- callback informed about what to wait for
.SH SYNOPSIS
.nf
#include <curl/curl.h>
int socket_callback(CURL *easy, /* easy handle */
curl_socket_t s, /* socket */
int what, /* describes the socket */
void *clientp, /* private callback pointer */
void *socketp); /* private socket pointer */
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_SOCKETFUNCTION, socket_callback);
.SH DESCRIPTION
Pass a pointer to your callback function, which should match the prototype
shown above.
When the \fIcurl_multi_socket_action(3)\fP function is called, it uses this
callback to inform the application about updates in the socket (file
descriptor) status by doing none, one, or multiple calls to the
\fBsocket_callback\fP. The callback function gets status updates with changes
since the previous time the callback was called. If the given callback pointer
is set to NULL, no callback is called.
libcurl then expects the application to monitor the sockets for the specific
activities and tell libcurl again when something happens on one of them. Tell
libcurl by calling \fIcurl_multi_socket_action(3)\fP.
.SH "CALLBACK ARGUMENTS"
\fIeasy\fP identifies the specific transfer for which this update is related.
\fIs\fP is the specific socket this function invocation concerns. If the
\fBwhat\fP argument is not CURL_POLL_REMOVE then it holds information about
what activity on this socket the application is supposed to
monitor. Subsequent calls to this callback might update the \fBwhat\fP bits
for a socket that is already monitored.
The socket callback should return 0 on success, and -1 on error. If this
callback returns error, \fBall\fP transfers currently in progress in this
multi handle are aborted and made to fail.
\fBclientp\fP is set with \fICURLMOPT_SOCKETDATA(3)\fP.
\fBsocketp\fP is set with \fIcurl_multi_assign(3)\fP or NULL.
The \fBwhat\fP parameter informs the callback on the status of the given
socket. It can hold one of these values:
.IP CURL_POLL_IN
Wait for incoming data. For the socket to become readable.
.IP CURL_POLL_OUT
Wait for outgoing data. For the socket to become writable.
.IP CURL_POLL_INOUT
Wait for incoming and outgoing data. For the socket to become readable or
writable.
.IP CURL_POLL_REMOVE
The specified socket/file descriptor is no longer used by libcurl for any
active transfer. It might soon be added again.
.SH DEFAULT
NULL (no callback)
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
struct priv {
void *ours;
};
static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
{
struct priv *p = sockp;
printf("our ptr: %p\\n", p->ours);
if(what == CURL_POLL_REMOVE) {
/* remove the socket from our collection */
}
if(what & CURL_POLL_IN) {
/* wait for read on this socket */
}
if(what & CURL_POLL_OUT) {
/* wait for write on this socket */
}
return 0;
}
int main(void)
{
struct priv setup;
CURLM *multi = curl_multi_init();
/* ... use socket callback and custom pointer */
curl_multi_setopt(multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
curl_multi_setopt(multi, CURLMOPT_SOCKETDATA, &setup);
}
.fi
.SH AVAILABILITY
Added in 7.15.4
.SH RETURN VALUE
Returns CURLM_OK.
.SH "SEE ALSO"
.BR curl_multi_socket_action (3),
.BR CURLMOPT_SOCKETDATA (3),
.BR CURLMOPT_TIMERFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_TIMERDATA 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLMOPT_TIMERDATA \- custom pointer to pass to timer callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERDATA, void *pointer);
.SH DESCRIPTION
A data \fBpointer\fP to pass to the timer callback set with the
\fICURLMOPT_TIMERFUNCTION(3)\fP option.
This pointer is not touched by libcurl but is only be passed in to the timer
callbacks's \fBclientp\fP argument.
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
struct priv {
void *custom;
};
static int timerfunc(CURLM *multi, long timeout_ms, void *clientp)
{
struct priv *mydata = clientp;
printf("our ptr: %p\\n", mydata->custom);
if(timeout_ms) {
/* this is the new single timeout to wait for */
}
else {
/* delete the timeout, nothing to wait for now */
}
}
int main(void)
{
struct priv mydata;
CURLM *multi = curl_multi_init();
curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, timerfunc);
curl_multi_setopt(multi, CURLMOPT_TIMERDATA, &mydata);
}
.fi
.SH AVAILABILITY
Added in 7.16.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_TIMERFUNCTION (3),
.BR CURLMOPT_SOCKETFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLMOPT_TIMERFUNCTION 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLMOPT_TIMERFUNCTION \- callback to receive timeout values
.SH SYNOPSIS
.nf
#include <curl/curl.h>
int timer_callback(CURLM *multi, /* multi handle */
long timeout_ms, /* timeout in number of ms */
void *clientp); /* private callback pointer */
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERFUNCTION, timer_callback);
.SH DESCRIPTION
Pass a pointer to your callback function, which should match the prototype
shown above.
Certain features, such as timeouts and retries, require you to call libcurl
even when there is no activity on the file descriptors.
Your callback function \fBtimer_callback\fP should install a non-repeating
timer with an expire time of \fBtimeout_ms\fP milliseconds. When that timer
fires, call either \fIcurl_multi_socket_action(3)\fP or
\fIcurl_multi_perform(3)\fP, depending on which interface you use.
A \fBtimeout_ms\fP value of -1 passed to this callback means you should delete
the timer. All other values are valid expire times in number of milliseconds.
The \fBtimer_callback\fP is called when the timeout expire time is changed.
The \fBclientp\fP pointer is set with \fICURLMOPT_TIMERDATA(3)\fP.
The timer callback should return 0 on success, and -1 on error. If this
callback returns error, \fBall\fP transfers currently in progress in this
multi handle are aborted and made to fail.
This callback can be used instead of, or in addition to,
\fIcurl_multi_timeout(3)\fP.
\fBWARNING:\fP do not call libcurl directly from within the callback itself
when the \fBtimeout_ms\fP value is zero, since it risks triggering an
unpleasant recursive behavior that immediately calls another call to the
callback with a zero timeout...
.SH DEFAULT
NULL
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
struct priv {
void *custom;
};
static int timerfunc(CURLM *multi, long timeout_ms, void *clientp)
{
struct priv *mydata = clientp;
printf("our ptr: %p\\n", mydata->custom);
if(timeout_ms) {
/* this is the new single timeout to wait for */
}
else {
/* delete the timeout, nothing to wait for now */
}
}
int main(void)
{
struct priv mydata;
CURLM *multi = curl_multi_init();
curl_multi_setopt(multi, CURLMOPT_TIMERFUNCTION, timerfunc);
curl_multi_setopt(multi, CURLMOPT_TIMERDATA, &mydata);
}
.fi
.SH AVAILABILITY
Added in 7.16.0
.SH RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLMOPT_TIMERDATA (3),
.BR CURLMOPT_SOCKETFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ABSTRACT_UNIX_SOCKET 3 "08 Jan 2017" libcurl libcurl
.SH NAME
CURLOPT_ABSTRACT_UNIX_SOCKET \- abstract Unix domain socket
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ABSTRACT_UNIX_SOCKET,
char *path);
.fi
.SH DESCRIPTION
Enables the use of an abstract Unix domain socket instead of establishing a
TCP connection to a host. The parameter should be a char * to a
null-terminated string holding the path of the socket. The path is set to
\fIpath\fP prefixed by a NULL byte. This is the convention for abstract
sockets, however it should be stressed that the path passed to this function
should not contain a leading NULL byte.
On non-supporting platforms, the abstract address is interpreted as an empty
string and fails gracefully, generating a runtime error.
This option shares the same semantics as \fICURLOPT_UNIX_SOCKET_PATH(3)\fP in
which documentation more details can be found. Internally, these two options
share the same storage and therefore only one of them can be set per handle.
.SH DEFAULT
Default is NULL.
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_ABSTRACT_UNIX_SOCKET, "/tmp/foo.sock");
curl_easy_setopt(curl, CURLOPT_URL, "http://localhost/");
/* Perform the request */
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.53.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_UNIX_SOCKET_PATH (3),
.BR unix (7)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ACCEPTTIMEOUT_MS 3 "19 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_ACCEPTTIMEOUT_MS \- timeout waiting for FTP server to connect back
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ACCEPTTIMEOUT_MS, long ms);
.fi
.SH DESCRIPTION
Pass a long telling libcurl the maximum number of milliseconds to wait for a
server to connect back to libcurl when an active FTP connection is used.
.SH DEFAULT
60000 milliseconds
.SH PROTOCOLS
FTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/path/file");
/* wait no more than 5 seconds for FTP server responses */
curl_easy_setopt(curl, CURLOPT_ACCEPTTIMEOUT_MS, 5000L);
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.24.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_CONNECTTIMEOUT_MS (3),
.BR CURLOPT_DEBUGFUNCTION (3),
.BR CURLOPT_STDERR (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ACCEPT_ENCODING 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_ACCEPT_ENCODING \- automatic decompression of HTTP downloads
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ACCEPT_ENCODING, char *enc);
.fi
.SH DESCRIPTION
Pass a char * argument specifying what encoding you would like.
Sets the contents of the Accept-Encoding: header sent in an HTTP request, and
enables decoding of a response when a Content-Encoding: header is received.
libcurl potentially supports several different compressed encodings depending
on what support that has been built-in.
To aid applications not having to bother about what specific algorithms this
particular libcurl build supports, libcurl allows a zero-length string to be
set ("") to ask for an Accept-Encoding: header to be used that contains all
built-in supported encodings.
Alternatively, you can specify exactly the encoding or list of encodings you
want in the response. The following encodings are supported: \fIidentity\fP,
meaning non-compressed, \fIdeflate\fP which requests the server to compress
its response using the zlib algorithm, \fIgzip\fP which requests the gzip
algorithm, (since curl 7.57.0) \fIbr\fP which is brotli and (since curl
7.72.0) \fIzstd\fP which is zstd. Provide them in the string as a
comma-separated list of accepted encodings, like: \fB"br, gzip, deflate"\fP.
Set \fICURLOPT_ACCEPT_ENCODING(3)\fP to NULL to explicitly disable it, which
makes libcurl not send an Accept-Encoding: header and not decompress received
contents automatically.
You can also opt to just include the Accept-Encoding: header in your request
with \fICURLOPT_HTTPHEADER(3)\fP but then there is no automatic decompressing
when receiving data.
This is a request, not an order; the server may or may not do it. This option
must be set (to any non-NULL value) or else any unsolicited encoding done by
the server is ignored.
Servers might respond with Content-Encoding even without getting a
Accept-Encoding: in the request. Servers might respond with a different
Content-Encoding than what was asked for in the request.
The Content-Length: servers send for a compressed response is supposed to
indicate the length of the compressed content so when auto decoding is enabled
it may not match the sum of bytes reported by the write callbacks (although,
sending the length of the non-compressed content is a common server mistake).
The application does not have to keep the string around after setting this
option.
.SH DEFAULT
NULL
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* enable all supported built-in compressions */
curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
/* Perform the request */
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
This option was called CURLOPT_ENCODING before 7.21.6
The specific libcurl you are using must have been built with zlib to be able to
decompress gzip and deflate responses, with the brotli library to
decompress brotli responses and with the zstd library to decompress zstd
responses.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_HTTP_CONTENT_DECODING (3),
.BR CURLOPT_HTTPHEADER (3),
.BR CURLOPT_TRANSFER_ENCODING (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ADDRESS_SCOPE 3 "19 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_ADDRESS_SCOPE \- scope id for IPv6 addresses
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ADDRESS_SCOPE, long scope);
.fi
.SH DESCRIPTION
Pass a long specifying the scope id value to use when connecting to IPv6 addresses.
.SH DEFAULT
0
.SH PROTOCOLS
All, when using IPv6
.SH EXAMPLE
.nf
#include <net/if.h> /* for if_nametoindex() */
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode ret;
long my_scope_id;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
my_scope_id = if_nametoindex("eth0");
curl_easy_setopt(curl, CURLOPT_ADDRESS_SCOPE, my_scope_id);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.19.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
Returns CURLE_BAD_FUNCTION_ARGUMENT if set to a negative value.
.SH "SEE ALSO"
.BR CURLOPT_DEBUGFUNCTION (3),
.BR CURLOPT_STDERR (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ALTSVC 3 "5 Feb 2019" libcurl libcurl
.SH NAME
CURLOPT_ALTSVC \- alt-svc cache file name
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC, char *filename);
.fi
.SH DESCRIPTION
Pass in a pointer to a \fIfilename\fP to instruct libcurl to use that file as
the Alt-Svc cache to read existing cache contents from and possibly also write
it back to after a transfer, unless \fBCURLALTSVC_READONLYFILE\fP is set in
\fICURLOPT_ALTSVC_CTRL(3)\fP.
Specify a blank file name ("") to make libcurl not load from a file at all.
.SH DEFAULT
NULL. The alt-svc cache is not read nor written to file.
.SH PROTOCOLS
HTTPS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, CURLALTSVC_H1);
curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
curl_easy_perform(curl);
}
}
.fi
.SH "FILE FORMAT"
A text based file with one line per alt-svc entry and each line consists of
nine space-separated fields.
An example line could look like
h2 www.example 8443 h3 second.example 443 "20190808 06:18:37" 1 0
The fields of that line are:
.IP h2
ALPN id for the source origin
.IP www.example
Host name for the source origin
.IP 8443
Port number for the source origin
.IP h3
ALPN id for the destination host
.IP second.example
Host name for the destination host
.IP 443
Port number for the destination host
.IP 2019*
Expiration date and time of this entry within double quotes. The date format
is "YYYYMMDD HH:MM:SS" and the time zone is GMT.
.IP 1
Boolean (1 or 0) if "persist" was set for this entry
.IP 0
Integer priority value (not currently used)
.SH AVAILABILITY
Added in 7.64.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_ALTSVC_CTRL (3),
.BR CURLOPT_CONNECT_TO (3),
.BR CURLOPT_COOKIEFILE (3),
.BR CURLOPT_RESOLVE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_ALTSVC_CTRL 3 "5 Feb 2019" libcurl libcurl
.SH NAME
CURLOPT_ALTSVC_CTRL \- control alt-svc behavior
.SH SYNOPSIS
.nf
#include <curl/curl.h>
#define CURLALTSVC_READONLYFILE (1<<2)
#define CURLALTSVC_H1 (1<<3)
#define CURLALTSVC_H2 (1<<4)
#define CURLALTSVC_H3 (1<<5)
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ALTSVC_CTRL, long bitmask);
.fi
.SH DESCRIPTION
Populate the long \fIbitmask\fP with the correct set of features to instruct
libcurl how to handle Alt-Svc for the transfers using this handle.
libcurl only accepts Alt-Svc headers over a secure transport, meaning
HTTPS. It also only completes a request to an alternative origin if that
origin is properly hosted over HTTPS. These requirements are there to make
sure both the source and the destination are legitimate.
Alternative services are only used when setting up new connections. If there
exists an existing connection to the host in the connection pool, then that is
preferred.
Setting any bit enables the alt-svc engine.
.IP "CURLALTSVC_READONLYFILE"
Do not write the alt-svc cache back to the file specified with
\fICURLOPT_ALTSVC(3)\fP even if it gets updated. By default a file specified
with that option is read and written to as deemed necessary.
.IP "CURLALTSVC_H1"
Accept alternative services offered over HTTP/1.1.
.IP "CURLALTSVC_H2"
Accept alternative services offered over HTTP/2. This is only used if libcurl
was also built to actually support HTTP/2, otherwise this bit is ignored.
.IP "CURLALTSVC_H3"
Accept alternative services offered over HTTP/3. This is only used if libcurl
was also built to actually support HTTP/3, otherwise this bit is ignored.
.SH DEFAULT
Alt-Svc handling is disabled by default. If \fICURLOPT_ALTSVC(3)\fP is set,
\fICURLOPT_ALTSVC_CTRL(3)\fP has a default value corresponding to
CURLALTSVC_H1 | CURLALTSVC_H2 | CURLALTSVC_H3 - the HTTP/2 and HTTP/3 bits are
only set if libcurl was built with support for those versions.
.SH PROTOCOLS
HTTPS
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, (long)CURLALTSVC_H1);
curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc-cache.txt");
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.64.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_ALTSVC (3),
.BR CURLOPT_CONNECT_TO (3),
.BR CURLOPT_RESOLVE (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_APPEND 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_APPEND \- append to the remote file
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_APPEND, long append);
.fi
.SH DESCRIPTION
A long parameter set to 1 tells the library to append to the remote file
instead of overwrite it. This is only useful when uploading to an FTP site.
.SH DEFAULT
0 (disabled)
.SH PROTOCOLS
FTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/to/newfile");
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
curl_easy_setopt(curl, CURLOPT_APPEND, 1L);
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
This option was known as CURLOPT_FTPAPPEND up to 7.16.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_DIRLISTONLY (3),
.BR CURLOPT_RESUME_FROM (3),
.BR CURLOPT_UPLOAD (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_AUTOREFERER 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_AUTOREFERER \- automatically update the referer header
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AUTOREFERER, long autorefer);
.fi
.SH DESCRIPTION
Pass a long parameter set to 1 to enable this. When enabled, libcurl
automatically sets the Referer: header field in HTTP requests to the full URL
when it follows a Location: redirect to a new destination.
The automatic referer is set to the full previous URL even when redirects are
done cross-origin or following redirects to insecure protocols. This is
considered a minor privacy leak by some.
.SH DEFAULT
0, disabled
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
/* follow redirects */
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
/* set Referer: automatically when following redirects */
curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Along with HTTP
.SH RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLINFO_EFFECTIVE_URL (3),
.BR CURLINFO_REDIRECT_URL (3),
.BR CURLOPT_FOLLOWLOCATION (3),
.BR CURLOPT_REFERER (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.haxx.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_AWS_SIGV4 3 "03 Jun 2020" libcurl libcurl
.SH NAME
CURLOPT_AWS_SIGV4 \- V4 signature
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AWS_SIGV4, char *param);
.fi
.SH DESCRIPTION
Provides AWS V4 signature authentication on HTTP(S) header.
.PP
Pass a char * that is the collection of specific arguments are used for
creating outgoing authentication headers. The format of the \fIparam\fP
option is:
.IP provider1[:provider2[:region[:service]]]
.IP provider1,\ provider2
The providers arguments are used for generating some authentication parameters
such as "Algorithm", "date", "request type" and "signed headers".
.IP region
The argument is a geographic area of a resources collection.
It is extracted from the host name specified in the URL if omitted.
.IP service
The argument is a function provided by a cloud.
It is extracted from the host name specified in the URL if omitted.
.PP
NOTE: This call set \fICURLOPT_HTTPAUTH(3)\fP to CURLAUTH_AWS_SIGV4.
Calling \fICURLOPT_HTTPAUTH(3)\fP with CURLAUTH_AWS_SIGV4 is the same
as calling this with \fB"aws:amz"\fP in parameter.
.PP
Example with "Test:Try", when curl uses the algorithm, it generates
\fB"TEST-HMAC-SHA256"\fP for "Algorithm", \fB"x-try-date"\fP and
\fB"X-Try-Date"\fP for "date", \fB"test4_request"\fP for "request type",
\fB"SignedHeaders=content-type;host;x-try-date"\fP for "signed headers"
.PP
If you use just "test", instead of "test:try", test is used for every
generated string.
.SH DEFAULT
By default, the value of this parameter is NULL.
Calling \fICURLOPT_HTTPAUTH(3)\fP with CURLAUTH_AWS_SIGV4 is the same
as calling this with \fB"aws:amz"\fP in parameter.
.SH PROTOCOLS
HTTP
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL,
"https://service.region.example.com/uri");
curl_easy_setopt(curl, CURLOPT_AWS_SIGV4, "provider1:provider2");
/* service and region can also be set in CURLOPT_AWS_SIGV4 */
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/uri");
curl_easy_setopt(curl, CURLOPT_AWS_SIGV4,
"provider1:provider2:region:service");
curl_easy_setopt(curl, CURLOPT_USERPWD, "MY_ACCESS_KEY:MY_SECRET_KEY");
curl_easy_perform(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.75.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH NOTES
This option overrides the other auth types you might have set in
\fICURLOPT_HTTPAUTH(3)\fP which should be highlighted as this makes this auth
method special. This method cannot be combined with other auth types.
.PP
A sha256 checksum of the request payload is used as input to the signature
calculation. For POST requests, this is a checksum of the provided
\fICURLOPT_POSTFIELDS(3)\fP. Otherwise, it's the checksum of an empty buffer.
For requests like PUT, you can provide your own checksum in an HTTP header named
\fBx-provider2-content-sha256\fP.
.PP
For \fBaws:s3\fP, a \fBx-amz-content-sha256\fP header is added to every request
if not already present. For s3 requests with unknown payload, this header takes
the special value "UNSIGNED-PAYLOAD".
.SH "SEE ALSO"
.BR CURLOPT_HEADEROPT (3),
.BR CURLOPT_HTTPAUTH (3),
.BR CURLOPT_HTTPHEADER (3),
.BR CURLOPT_PROXYAUTH (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_BUFFERSIZE 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_BUFFERSIZE \- receive buffer size
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_BUFFERSIZE, long size);
.fi
.SH DESCRIPTION
Pass a long specifying your preferred \fIsize\fP (in bytes) for the receive
buffer in libcurl. The main point of this would be that the write callback
gets called more often and with smaller chunks. Secondly, for some protocols,
there is a benefit of having a larger buffer for performance.
This is just treated as a request, not an order. You cannot be guaranteed to
actually get the given size.
This buffer size is by default \fICURL_MAX_WRITE_SIZE\fP (16kB). The maximum
buffer size allowed to be set is \fICURL_MAX_READ_SIZE\fP (10MB). The minimum
buffer size allowed to be set is 1024.
DO NOT set this option on a handle that is currently used for an active
transfer as that may lead to unintended consequences.
The maximum size was 512kB until 7.88.0.
.SH DEFAULT
CURL_MAX_WRITE_SIZE (16kB)
.SH PROTOCOLS
All
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/foo.bin");
/* ask libcurl to allocate a larger receive buffer */
curl_easy_setopt(curl, CURLOPT_BUFFERSIZE, 120000L);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.10. Growing the buffer was added in 7.53.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_MAX_RECV_SPEED_LARGE (3),
.BR CURLOPT_MAXFILESIZE (3),
.BR CURLOPT_UPLOAD_BUFFERSIZE (3),
.BR CURLOPT_WRITEFUNCTION (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_CAINFO 3 "17 Jun 2014" libcurl libcurl
.SH NAME
CURLOPT_CAINFO \- path to Certificate Authority (CA) bundle
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO, char *path);
.fi
.SH DESCRIPTION
Pass a char * to a null-terminated string naming a file holding one or more
certificates to verify the peer with.
If \fICURLOPT_SSL_VERIFYPEER(3)\fP is zero and you avoid verifying the
server's certificate, \fICURLOPT_CAINFO(3)\fP need not even indicate an
accessible file.
This option is by default set to the system path where libcurl's CA
certificate bundle is assumed to be stored, as established at build time.
(iOS and macOS) When curl uses Secure Transport this option is supported. If
the option is not set, then curl uses the certificates in the system and user
Keychain to verify the peer.
(Schannel) This option is supported for Schannel in Windows 7 or later but we
recommend not using it until Windows 8 since it works better starting then.
If the option is not set, then curl uses the certificates in the Windows'
store of root certificates (the default for Schannel).
The application does not have to keep the string around after setting this
option.
The default value for this can be figured out with \fICURLINFO_CAINFO(3)\fP.
.SH DEFAULT
Built-in system specific. When curl is built with Secure Transport or
Schannel, this option is not set by default.
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
For the SSL engines that do not support certificate files the
\fICURLOPT_CAINFO(3)\fP option is ignored. Schannel support added in libcurl
7.60.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLINFO_CAINFO (3),
.BR CURLOPT_CA_CACHE_TIMEOUT (3),
.BR CURLOPT_CAINFO_BLOB (3),
.BR CURLOPT_CAPATH (3),
.BR CURLOPT_SSL_VERIFYHOST (3),
.BR CURLOPT_SSL_VERIFYPEER (3)

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
.\" *
.\" * This software is licensed as described in the file COPYING, which
.\" * you should have received as part of this distribution. The terms
.\" * are also available at https://curl.se/docs/copyright.html.
.\" *
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
.\" * copies of the Software, and permit persons to whom the Software is
.\" * furnished to do so, under the terms of the COPYING file.
.\" *
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
.\" * KIND, either express or implied.
.\" *
.\" * SPDX-License-Identifier: curl
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_CAINFO_BLOB 3 "31 March 2021" libcurl libcurl
.SH NAME
CURLOPT_CAINFO_BLOB \- Certificate Authority (CA) bundle in PEM format
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO_BLOB,
struct curl_blob *stblob);
.fi
.SH DESCRIPTION
Pass a pointer to a curl_blob structure, which contains information (pointer
and size) about a memory block with binary data of PEM encoded content holding
one or more certificates to verify the HTTPS server with.
If the blob is initialized with the flags member of struct curl_blob set to
CURL_BLOB_COPY, the application does not have to keep the buffer around after
setting this.
If \fICURLOPT_SSL_VERIFYPEER(3)\fP is zero and you avoid verifying the
server's certificate, \fICURLOPT_CAINFO_BLOB(3)\fP is not needed.
This option overrides \fICURLOPT_CAINFO(3)\fP.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
#include <string.h>
int main(void)
{
char *strpem; /* strpem must point to a PEM string */
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
struct curl_blob blob;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
blob.data = strpem;
blob.len = strlen(strpem);
blob.flags = CURL_BLOB_COPY;
curl_easy_setopt(curl, CURLOPT_CAINFO_BLOB, &blob);
res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
}
.fi
.SH AVAILABILITY
Added in 7.77.0.
This option is supported by the BearSSL (since 7.79.0), mbedTLS (since 7.81.0),
rustls (since 7.82.0), wolfSSL (since 8.2.0), OpenSSL, Secure Transport and Schannel backends.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_CAINFO (3),
.BR CURLOPT_CAPATH (3),
.BR CURLOPT_SSL_VERIFYPEER (3),
.BR CURLOPT_SSL_VERIFYHOST (3)

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