79 lines
1.9 KiB
Markdown
79 lines
1.9 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_COPYPOSTFIELDS
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_MIMEPOST (3)
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- CURLOPT_POSTFIELDS (3)
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- CURLOPT_POSTFIELDSIZE (3)
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- CURLOPT_UPLOAD (3)
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---
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# NAME
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CURLOPT_COPYPOSTFIELDS - have libcurl copy data to POST
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# SYNOPSIS
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~~~c
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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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~~~
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# DESCRIPTION
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Pass a char pointer as parameter, which should be the full *data* to post in a
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HTTP POST operation. It behaves as the CURLOPT_POSTFIELDS(3) 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 are copied, care must be taken when using this option in
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conjunction with CURLOPT_POSTFIELDSIZE(3) or
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CURLOPT_POSTFIELDSIZE_LARGE(3): If the size has not been set prior to
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CURLOPT_COPYPOSTFIELDS(3), the data is assumed to be a null-terminated
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string; else the stored size informs the library about the byte count to
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copy. In any case, the size must not be changed after
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CURLOPT_COPYPOSTFIELDS(3), unless another CURLOPT_POSTFIELDS(3) or
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CURLOPT_COPYPOSTFIELDS(3) option is issued.
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# DEFAULT
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NULL
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# PROTOCOLS
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HTTP(S)
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# EXAMPLE
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~~~c
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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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~~~
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# AVAILABILITY
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Added in 7.17.1
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
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CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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