65 lines
2.2 KiB
Groff
65 lines
2.2 KiB
Groff
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.\" generated by cd2nroff 0.1 from CURLOPT_COPYPOSTFIELDS.md
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.TH CURLOPT_COPYPOSTFIELDS 3 "2025-07-07" libcurl
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.SH NAME
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CURLOPT_COPYPOSTFIELDS \- have libcurl copy data to POST
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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_COPYPOSTFIELDS, char *data);
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.fi
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.SH DESCRIPTION
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Pass a char pointer as parameter, which should be the full \fIdata\fP to post in a
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HTTP POST operation. It behaves as the \fICURLOPT_POSTFIELDS(3)\fP option, but the
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original data is instead copied by the library, allowing the application to
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overwrite the original data after setting this option.
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Because data is copied, care must be taken when using this option in
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conjunction with \fICURLOPT_POSTFIELDSIZE(3)\fP or \fICURLOPT_POSTFIELDSIZE_LARGE(3)\fP.
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If the size has not been set prior to \fICURLOPT_COPYPOSTFIELDS(3)\fP, the data is
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assumed to be a null\-terminated string; else the stored size informs the
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library about the byte count to copy. In any case, the size must not be
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changed after \fICURLOPT_COPYPOSTFIELDS(3)\fP, unless another \fICURLOPT_POSTFIELDS(3)\fP
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or \fICURLOPT_COPYPOSTFIELDS(3)\fP option is set.
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The application does not have to keep the string around after setting this
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option.
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Using this option multiple times makes the last set string override the
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previous ones. Set it to NULL to disable its use again.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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This functionality affects http only
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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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char local_buffer[1024]="data to send";
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* size of the data to copy from the buffer and send in the request */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, 12L);
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/* send data from the local stack */
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curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, local_buffer);
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curl_easy_perform(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 curl 7.17.1
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.SH RETURN VALUE
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\fIcurl_easy_setopt(3)\fP returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non\-zero means an error occurred, see
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\fIlibcurl\-errors(3)\fP.
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.SH SEE ALSO
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.BR CURLOPT_MIMEPOST (3),
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.BR CURLOPT_POSTFIELDS (3),
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.BR CURLOPT_POSTFIELDSIZE (3),
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.BR CURLOPT_UPLOAD (3)
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