99 lines
3.0 KiB
Groff
99 lines
3.0 KiB
Groff
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_SUPPRESS_CONNECT_HEADERS 3 "13 February 2017" libcurl libcurl
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.SH NAME
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CURLOPT_SUPPRESS_CONNECT_HEADERS \- suppress proxy CONNECT response headers from user callbacks
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SUPPRESS_CONNECT_HEADERS, long onoff);
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.fi
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.SH DESCRIPTION
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When \fICURLOPT_HTTPPROXYTUNNEL(3)\fP is used and a CONNECT request is made,
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suppress proxy CONNECT response headers from the user callback functions
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\fICURLOPT_HEADERFUNCTION(3)\fP and \fICURLOPT_WRITEFUNCTION(3)\fP.
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Proxy CONNECT response headers can complicate header processing since it's
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essentially a separate set of headers. You can enable this option to suppress
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those headers.
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For example let's assume an HTTPS URL is to be retrieved via CONNECT. On
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success there would normally be two sets of headers, and each header line sent
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to the header function and/or the write function. The data given to the
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callbacks would look like this:
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.nf
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HTTP/1.1 200 Connection established
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{headers}...
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HTTP/1.1 200 OK
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Content-Type: application/json
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{headers}...
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{body}...
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.fi
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However by enabling this option the CONNECT response headers are suppressed, so
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the data given to the callbacks would look like this:
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.nf
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HTTP/1.1 200 OK
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Content-Type: application/json
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{headers}...
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{body}...
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.fi
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.SH DEFAULT
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0
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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.nf
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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curl_easy_setopt(curl, CURLOPT_HEADER, 1L);
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curl_easy_setopt(curl, CURLOPT_PROXY, "http://foo:3128");
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curl_easy_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, 1L);
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curl_easy_setopt(curl, CURLOPT_SUPPRESS_CONNECT_HEADERS, 1L);
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curl_easy_perform(curl);
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/* always cleanup */
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curl_easy_cleanup(curl);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.54.0
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.SH RETURN VALUE
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CURLE_OK or an error such as CURLE_UNKNOWN_OPTION.
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.SH "SEE ALSO"
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.BR CURLOPT_HEADER (3),
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.BR CURLOPT_PROXY (3),
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.BR CURLOPT_HTTPPROXYTUNNEL (3)
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