NAME

       CURLOPT_POSTFIELDSIZE - size of POST data pointed to

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDSIZE, long size);

DESCRIPTION

       If  you  want  to post static data to the server without having libcurl do a strlen() to measure the data
       size, this option must be used. When this option is used you can post fully binary data, which  otherwise
       is  likely  to  fail.  If  this size is set to -1, libcurl uses strlen() to get the size or relies on the
       CURLOPT_READFUNCTION(3) (if used) to signal the end of data.

       If you post more than 2GB, use CURLOPT_POSTFIELDSIZE_LARGE(3).

DEFAULT

       -1

PROTOCOLS

       This functionality affects http only

EXAMPLE

       #include <string.h> /* for strlen */

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           const char *data = "data to send";

           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

           /* size of the POST data */
           curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, (long) strlen(data));

           curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);

           curl_easy_perform(curl);
         }
       }

AVAILABILITY

       Added in curl 7.2

RETURN VALUE

       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

SEE ALSO

       CURLOPT_POSTFIELDS(3), CURLOPT_POSTFIELDSIZE_LARGE(3)

libcurl                                            2025-03-05                           CURLOPT_POSTFIELDSIZE(3)