CURLOPT_COPYPOSTFIELDS(3)

1CURLOPT_COPYPOSTFIELDS(3)  curl_easy_setopt options  CURLOPT_COPYPOSTFIELDS(3)
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NAME

6       CURLOPT_COPYPOSTFIELDS - have libcurl copy data to POST
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLcode  curl_easy_setopt(CURL  *handle,  CURLOPT_COPYPOSTFIELDS, char
12       *data);
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DESCRIPTION

15       Pass a char * as parameter, which should be the full data to post in  a
16       HTTP  POST  operation.  It behaves as the CURLOPT_POSTFIELDS(3) option,
17       but the original data is instead copied by the  library,  allowing  the
18       application to overwrite the original data after setting this option.
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20       Because  data  are copied, care must be taken when using this option in
21       conjunction   with   CURLOPT_POSTFIELDSIZE(3)   or   CURLOPT_POSTFIELD‐
22       SIZE_LARGE(3):  If the size has not been set prior to CURLOPT_COPYPOST‐
23       FIELDS(3), the data is assumed to be a zero terminated string; else the
24       stored  size  informs  the library about the byte count to copy. In any
25       case, the size must not  be  changed  after  CURLOPT_COPYPOSTFIELDS(3),
26       unless   another   CURLOPT_POSTFIELDS(3)  or  CURLOPT_COPYPOSTFIELDS(3)
27       option is issued.
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DEFAULT

30       NULL
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PROTOCOLS

33       HTTP(S)
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EXAMPLE

36       CURL *curl = curl_easy_init();
37       if(curl) {
38         char local_buffer[1024]="data to send";
39         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
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41         /* size of the data to copy from the buffer and send in the request */
42         curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, 12L);
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44         /* send data from the local stack */
45         curl_easy_setopt(curl, CURLOPT_COPYPOSTFIELDS, local_buffer);
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47         curl_easy_perform(curl);
48       }
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AVAILABILITY

51       Added in 7.17.1
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RETURN VALUE

54       Returns CURLE_OK if the option is  supported,  CURLE_UNKNOWN_OPTION  if
55       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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