GNURLOPT_POST(3)

💅 GNURLOPT_POST(3) 💅

okay so bestie, welcome to the GNURLOPT_POST(3) page from the curl_easy_setopt options crew 💖 this is the one that makes your handle go “POST era” and honestly it’s giving main character energy 🔥

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💖 NAME 💖

CURLOPT_POST — request an HTTP POST 💌

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✨ SYNOPSIS ✨

#include <gnurl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POST, long post);

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🌸 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 CURLOPT_POSTFIELDSIZE_LARGE(3) to set the data size 💅

Optionally, you can provide data to POST using the CURLOPT_READFUNCTION(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 knowing 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 automatically use chunked encoding for POSTs if the size is unknown.) 🌈

When setting CURLOPT_POST(3) to 1, libcurl will automatically set CURLOPT_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 💜

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🎀 DEFAULT 🎀

0, disabled 😴

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🦋 PROTOCOLS 🦋

HTTP

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🔥 EXAMPLE 🔥

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "http://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);
}

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⭐ AVAILABILITY ⭐

Along with HTTP 🌸

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💜 RETURN VALUE 💜

Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not 🫶

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🌈 SEE ALSO 🌈

CURLOPT_POSTFIELDS(3), CURLOPT_HTTPPOST(3),

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🫶 that’s the whole page, bestie! source/version vibes: libcurl 7.37.0, dated 17 Jun 2014, and the page is GNURLOPT_POST(3). now go POST something iconic 💅✨