CURLOPT_HTTPPOST(3) Library Functions Manual CURLOPT_HTTPPOST(3)
NAME
CURLOPT_HTTPPOST - multipart formpost content
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTPPOST,
struct curl_httppost *formpost);
DESCRIPTION
This option is deprecated. Use CURLOPT_MIMEPOST(3) instead.
Tells libcurl you want a multipart/formdata HTTP POST to be made and you
instruct what data to pass on to the server in the formpost argument.
Pass a pointer to a linked list of curl_httppost structs as parameter.
The easiest way to create such a list, is to use curl_formadd(3) as doc-
umented. The data in this list must remain intact as long as the curl
transfer is alive and is using it.
Using POST with HTTP 1.1 implies the use of a "Expect: 100-continue"
header. You can disable this header with CURLOPT_HTTPHEADER(3).
When setting CURLOPT_HTTPPOST(3), libcurl automatically sets CURLOPT_NO-
BODY(3) to 0.
DEFAULT
NULL
PROTOCOLS
This functionality affects http only
EXAMPLE
int main(void)
{
struct curl_httppost *formpost;
struct curl_httppost *lastptr;
/* Fill in the file upload field. This makes libcurl load data from
the given file name when curl_easy_perform() is called. */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "sendfile",
CURLFORM_FILE, "postit2.c",
CURLFORM_END);
/* Fill in the filename field */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "filename",
CURLFORM_COPYCONTENTS, "postit2.c",
CURLFORM_END);
/* Fill in the submit field too, even if this is rarely needed */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "send",
CURLFORM_END);
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
curl_formfree(formpost);
}
DEPRECATED
Deprecated in 7.56.0.
AVAILABILITY
Added in curl 7.1
RETURN VALUE
curl_easy_setopt(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred,
see libcurl-errors(3).
SEE ALSO
CURLOPT_MIMEPOST(3), CURLOPT_POST(3), CURLOPT_POSTFIELDS(3), curl_for-
madd(3), curl_formfree(3), curl_mime_init(3)
libcurl 2026-07-12 CURLOPT_HTTPPOST(3)
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