CURLOPT_POST - make an HTTP POST
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POST, long post);
CURLOPT_POST(3) curl_easy_setopt options CURLOPT_POST(3) NAME CURLOPT_POST - make an HTTP POST SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POST, long post); DESCRIPTION A parameter set to 1 tells libcurl to do a regular HTTP post. This will also make the library use a "Content-Type: application/x-www-form- urlencoded" header. (This is by far the most commonly used POST method). Use one of CURLOPT_POSTFIELDS(3) or CURLOPT_COPYPOSTFIELDS(3) options to specify what data to post and CURLOPT_POSTFIELDSIZE(3) or CUR- LOPT_POSTFIELDSIZE_LARGE(3) to set the data size. Optionally, you can provide data to POST using the CURLOPT_READFUNC- TION(3) and CURLOPT_READDATA(3) options but then you must make sure to not set CURLOPT_POSTFIELDS(3) to anything but NULL. When providing data with a callback, you must transmit it using chunked transfer-encoding or you must set the size of the data with the CURLOPT_POSTFIELDSIZE(3) or CURLOPT_POSTFIELDSIZE_LARGE(3) options. To enable chunked encoding, you simply pass in the appropriate Transfer-Encoding header, see the post-callback.c example. You can override the default POST Content-Type: header by setting your own with CURLOPT_HTTPHEADER(3). 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. If you use POST to an HTTP 1.1 server, you can send data without know- ing the size before starting the POST if you use chunked encoding. You enable this by adding a header like "Transfer-Encoding: chunked" with CURLOPT_HTTPHEADER(3). With HTTP 1.0 or without chunked transfer, you must specify the size in the request. (Since 7.66.0, libcurl will auto- matically use chunked encoding for POSTs if the size is unknown.) When setting CURLOPT_POST(3) to 1, libcurl will automatically set CUR- LOPT_NOBODY(3) and CURLOPT_HTTPGET(3) to 0. If you issue a POST request and then want to make a HEAD or GET using the same re-used handle, you must explicitly set the new request type using CURLOPT_NOBODY(3) or CURLOPT_HTTPGET(3) or similar. DEFAULT 0, disabled PROTOCOLS HTTP EXAMPLE CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin"); curl_easy_setopt(curl, CURLOPT_POST, 1L); /* set up the read callback with CURLOPT_READFUNCTION */ ret = curl_easy_perform(curl); curl_easy_cleanup(curl); } AVAILABILITY Along with HTTP RETURN VALUE Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not. ATTRIBUTES See attributes(7) for descriptions of the following attributes: +---------------+------------------+ |ATTRIBUTE TYPE | ATTRIBUTE VALUE | +---------------+------------------+ |Availability | web/curl | +---------------+------------------+ |Stability | Uncommitted | +---------------+------------------+ SEE ALSO CURLOPT_POSTFIELDS(3), CURLOPT_HTTPPOST(3), NOTES Source code for open source software components in Oracle Solaris can be found at https://www.oracle.com/downloads/opensource/solaris-source- code-downloads.html. This software was built from source available at https://github.com/oracle/solaris-userland. The original community source was downloaded from https://curl.se/down- load/curl-7.83.1.tar.bz2. Further information about this software can be found on the open source community website at http://curl.haxx.se/. libcurl 7.83.1 November 26, 2021 CURLOPT_POST(3)