CURLOPT_POSTREDIR(3) Library Functions Manual CURLOPT_POSTREDIR(3)
NAME
CURLOPT_POSTREDIR - how to act on an HTTP POST redirect
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTREDIR,
long bitmask);
DESCRIPTION
Pass a bitmask to control how libcurl acts on redirects after POSTs that
get a 301, 302 or 303 response back. A parameter with bit 0 set (value
CURL_REDIR_POST_301) tells the library to respect RFC 7231 (section
6.4.2 to 6.4.4) and not convert POST requests into GET requests when
following a 301 redirection. Setting bit 1 (value CURL_REDIR_POST_302)
makes libcurl maintain the request method after a 302 redirect whilst
setting bit 2 (value CURL_REDIR_POST_303) makes libcurl maintain the re-
quest method after a 303 redirect. The value CURL_REDIR_POST_ALL is a
convenience define that sets all three bits.
The non-RFC behavior is ubiquitous in web browsers, so the library does
the conversion by default to maintain consistency. However, a server may
require a POST to remain a POST after such a redirection. This option is
meaningful only when setting CURLOPT_FOLLOWLOCATION(3).
DEFAULT
0
PROTOCOLS
This functionality affects http only
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* a silly POST example */
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "data=true");
/* example.com is redirected, so we tell libcurl to send POST on 301,
302 and 303 HTTP response codes */
curl_easy_setopt(curl, CURLOPT_POSTREDIR, (long)CURL_REDIR_POST_ALL);
curl_easy_perform(curl);
}
}
HISTORY
This option was known as CURLOPT_POST301 up to 7.19.0 as it only sup-
ported the 301 then. CURL_REDIR_POST_303 was added in 7.26.0.
AVAILABILITY
Added in curl 7.19.1
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
CURLINFO_EFFECTIVE_METHOD(3), CURLINFO_REDIRECT_COUNT(3), CURLOPT_FOL-
LOWLOCATION(3), CURLOPT_MAXREDIRS(3), CURLOPT_POSTFIELDS(3)
libcurl 2026-07-12 CURLOPT_POSTREDIR(3)
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