73 lines
1.8 KiB
Markdown
73 lines
1.8 KiB
Markdown
---
|
|
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
SPDX-License-Identifier: curl
|
|
Title: curl_easy_duphandle
|
|
Section: 3
|
|
Source: libcurl
|
|
See-also:
|
|
- curl_easy_cleanup (3)
|
|
- curl_easy_init (3)
|
|
- curl_easy_reset (3)
|
|
- curl_global_init (3)
|
|
---
|
|
|
|
# NAME
|
|
|
|
curl_easy_duphandle - Clone a libcurl session handle
|
|
|
|
# SYNOPSIS
|
|
|
|
~~~c
|
|
#include <curl/curl.h>
|
|
|
|
CURL *curl_easy_duphandle(CURL *handle);
|
|
~~~
|
|
|
|
# DESCRIPTION
|
|
|
|
This function returns a new curl handle, a duplicate, using all the options
|
|
previously set in the input curl *handle*. Both handles can subsequently be
|
|
used independently and they must both be freed with curl_easy_cleanup(3).
|
|
|
|
Any options that the input handle has been told to point to (as opposed to
|
|
copy) with previous calls to curl_easy_setopt(3), are pointed to by the new
|
|
handle as well. You must therefore make sure to keep the data around until
|
|
both handles have been cleaned up.
|
|
|
|
The new handle does **not** inherit any state information, no connections, no
|
|
SSL sessions and no cookies. It also does not inherit any share object states
|
|
or options (created as if CURLOPT_SHARE(3) was set to NULL).
|
|
|
|
If the source handle has HSTS or alt-svc enabled, the duplicate gets data read
|
|
data from the main filename to populate the cache.
|
|
|
|
In multi-threaded programs, this function must be called in a synchronous way,
|
|
the input handle may not be in use when cloned.
|
|
|
|
# EXAMPLE
|
|
|
|
~~~c
|
|
int main(void)
|
|
{
|
|
CURL *curl = curl_easy_init();
|
|
if(curl) {
|
|
CURLcode res;
|
|
CURL *nother;
|
|
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
|
|
nother = curl_easy_duphandle(curl);
|
|
res = curl_easy_perform(nother);
|
|
curl_easy_cleanup(nother);
|
|
curl_easy_cleanup(curl);
|
|
}
|
|
}
|
|
~~~
|
|
|
|
# AVAILABILITY
|
|
|
|
Added in 7.9
|
|
|
|
# RETURN VALUE
|
|
|
|
If this function returns NULL, something went wrong and no valid handle was
|
|
returned.
|