CURLOPT_COPYPOSTFIELDS(3) curl_easy_setopt options CURLOPT_COPYPOSTFIELDS(3)
NAME
CURLOPT_COPYPOSTFIELDS - have libcurl copy data to POST
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_COPYPOSTFIELDS, char *data);
DESCRIPTION
Pass a char * as parameter, which should be the full data to post in a
HTTP POST operation. It behaves as the CURLOPT_POSTFIELDS(3) option,
but the original data is instead copied by the library, allowing the
application to overwrite the original data after setting this option.
Because data are copied, care must be taken when using this option in
conjunction with CURLOPT_POSTFIELDSIZE(3) or CURLOPT_POSTFIELD-
SIZE_LARGE(3): If the size has not been set prior to CURLOPT_COPYPOST-
FIELDS(3), the data is assumed to be a null-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 CURLOPT_COPYPOSTFIELDS(3), un-
less another CURLOPT_POSTFIELDS(3) or CURLOPT_COPYPOSTFIELDS(3) option
is issued.
DEFAULT
NULL
PROTOCOLS
HTTP(S)
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
char local_buffer[1024]="data to send";
curl_easy_setopt(curl, CURLOPT_URL, "https://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);
}
AVAILABILITY
Added in 7.17.1
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.
SEE ALSO
CURLOPT_POSTFIELDS(3), CURLOPT_POSTFIELDSIZE(3),
libcurl 7.81.0 November 26, 2021 CURLOPT_COPYPOSTFIELDS(3)
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