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//proc/self/root/opt/curlssl/share/man/man3/CURLOPT_POSTFIELDS.3
.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at http://curl.haxx.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" ************************************************************************** .\" .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), "
