NAME

       CURLOPT_POSTFIELDS - specify data to POST to server

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDS, char *postdata);

DESCRIPTION

       Pass  a  char  * as parameter, pointing to the full data to send in a HTTP POST operation.
       You must make sure that the data is formatted the way you want the server to  receive  it.
       libcurl  will not convert or encode it for you in any way. For example, the web server may
       assume that this data is url-encoded.

       The data pointed to is NOT copied by the library: as a consequence, it must  be  preserved
       by  the calling application until the associated transfer finishes.  This behaviour can be
       changed (so libcurl does copy the data) by setting the CURLOPT_COPYPOSTFIELDS(3) option.

       This POST is a normal application/x-www-form-urlencoded kind (and libcurl  will  set  that
       Content-Type  by  default when this option is used), which is commonly used by HTML forms.
       Change Content-Type with CURLOPT_HTTPHEADER(3).

       Using CURLOPT_POSTFIELDS(3) implies CURLOPT_POST(3).

       You can use curl_easy_escape(3) to url-encode  your  data,  if  necessary.  It  returns  a
       pointer to an encoded string that can be passed as postdata.

       If you want to do a zero-byte POST, you need to set CURLOPT_POSTFIELDSIZE(3) explicitly to
       zero, as simply setting CURLOPT_POSTFIELDS(3) to NULL or "" just effectively disables  the
       sending  of  the  specified  string. libcurl will instead assume that you'll send the POST
       data using the read callback!

       Using POST with HTTP 1.1 implies the use of a  "Expect:  100-continue"  header.   You  can
       disable this header with CURLOPT_HTTPHEADER(3) as usual.

       To  make  multipart/formdata  posts (aka RFC2388-posts), check out the CURLOPT_HTTPPOST(3)
       option combined with curl_formadd(3).

DEFAULT

       NULL

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, 12L);

         /* pass in a pointer to the data - libcurl will not copy */
         curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);

         curl_easy_perform(curl);
       }

AVAILABILITY

       Always

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLOPT_POSTFIELDSIZE(3), CURLOPT_READFUNCTION(3),