curlopt_postfieldsize(3) mojave man page | unix.com

CURLOPT_POSTFIELDSIZE(3)				     curl_easy_setopt options					  CURLOPT_POSTFIELDSIZE(3)

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 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, the library will use  strlen()
       to get the size.

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

DEFAULT
       -1

PROTOCOLS
       HTTP

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

	 curl_easy_setopt(curl, CURLOPT_URL, "http://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
       Along with HTTP

RETURN VALUE
       Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO
       CURLOPT_POSTFIELDS(3), CURLOPT_POSTFIELDSIZE_LARGE(3),

libcurl 7.54.0							 February 03, 2016					  CURLOPT_POSTFIELDSIZE(3)