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58 lines
1.8 KiB
Groff
58 lines
1.8 KiB
Groff
.\" generated by cd2nroff 0.1 from curl_easy_duphandle.md
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.TH curl_easy_duphandle 3 "2024-06-01" libcurl
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.SH NAME
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curl_easy_duphandle \- Clone a libcurl session handle
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURL *curl_easy_duphandle(CURL *handle);
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.fi
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.SH DESCRIPTION
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This function returns a new curl handle, a duplicate, using all the options
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previously set in the input curl \fIhandle\fP. Both handles can subsequently be
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used independently and they must both be freed with \fIcurl_easy_cleanup(3)\fP.
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Any options that the input handle has been told to point to (as opposed to
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copy) with previous calls to \fIcurl_easy_setopt(3)\fP, are pointed to by the new
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handle as well. You must therefore make sure to keep the data around until
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both handles have been cleaned up.
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The new handle does \fBnot\fP inherit any state information, no connections, no
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SSL sessions and no cookies. It also does not inherit any share object states
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or options (created as if \fICURLOPT_SHARE(3)\fP was set to NULL).
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If the source handle has HSTS or alt\-svc enabled, the duplicate gets data read
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data from the main filename to populate the cache.
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In multi\-threaded programs, this function must be called in a synchronous way,
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the input handle may not be in use when cloned.
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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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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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CURL *nother;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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nother = curl_easy_duphandle(curl);
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res = curl_easy_perform(nother);
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curl_easy_cleanup(nother);
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curl_easy_cleanup(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Added in 7.9
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.SH RETURN VALUE
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If this function returns NULL, something went wrong and no valid handle was
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returned.
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.SH SEE ALSO
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.BR curl_easy_cleanup (3),
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.BR curl_easy_init (3),
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.BR curl_easy_reset (3),
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.BR curl_global_init (3)
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