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.TH CURLOPT_POSTFIELDS 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_POSTFIELDS \- specify data to POST to server
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTFIELDS, char *postdata);
.SH 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 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 \fICURLOPT_HTTPHEADER(3)\fP.

Using \fICURLOPT_POSTFIELDS(3)\fP implies \fICURLOPT_POST(3)\fP.

If you want to do a zero-byte POST, you need to set
\fICURLOPT_POSTFIELDSIZE(3)\fP explicitly to zero, as simply setting
\fICURLOPT_POSTFIELDS(3)\fP 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 \fICURLOPT_HTTPHEADER(3)\fP as usual.

To make multipart/formdata posts (aka RFC2388-posts), check out the
\fICURLOPT_HTTPPOST(3)\fP option combined with \fIcurl_formadd(3)\fP.
.SH DEFAULT
NULL
.SH PROTOCOLS
HTTP
.SH EXAMPLE
TODO
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_POSTFIELDSIZE "(3), " CURLOPT_READFUNCTION "(3), "