curl/docs/libcurl/opts/CURLOPT_COPYPOSTFIELDS.3

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.TH CURLOPT_COPYPOSTFIELDS 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_COPYPOSTFIELDS \- have libcurl copy data to POST
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COPYPOSTFIELDS, char *data);
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.SH DESCRIPTION
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Pass a char * as parameter, which should be the full \fIdata\fP to post in a
HTTP POST operation. It behaves as the \fICURLOPT_POSTFIELDS(3)\fP option, but
the original data is instead copied by the library, allowing the application
to overwrite the original data after setting this option.
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Because data are copied, care must be taken when using this option in
conjunction with \fICURLOPT_POSTFIELDSIZE(3)\fP or
\fICURLOPT_POSTFIELDSIZE_LARGE(3)\fP: If the size has not been set prior to
\fICURLOPT_COPYPOSTFIELDS(3)\fP, the data is assumed to be a zero terminated
string; else the stored size informs the library about the byte count to
copy. In any case, the size must not be changed after
\fICURLOPT_COPYPOSTFIELDS(3)\fP, unless another \fICURLOPT_POSTFIELDS(3)\fP or
\fICURLOPT_COPYPOSTFIELDS(3)\fP option is issued.
.SH DEFAULT
NULL
.SH PROTOCOLS
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HTTP(S)
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.SH EXAMPLE
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.nf
CURL *curl = curl_easy_init();
if(curl) {
char local_buffer[1024]="data to send";
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
/* size of the data to copy from the buffer and send in the request */
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, 12L);
/* send data from the local stack */
curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, local_buffer);
curl_easy_perform(curl);
}
.fi
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.SH AVAILABILITY
Added in 7.17.1
.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_POSTFIELDS "(3), " CURLOPT_POSTFIELDSIZE "(3), "