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 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 request 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. A server may require a POST to remain a POST after such a redirection. This option is meaningful only when setting CURLOPT_FOLLOWLOCATION(3). This option affects transfers where libcurl has been told to use HTTP POST using for example CURLOPT_POST(3) or CURLOPT_MIMEPOST(3) and not if the method has merely been modified with CURLOPT_CUSTOMREQUEST(3).

DEFAULT
0

PROTOCOLS
This functionality affects http only

EXAMPLE
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    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, CURL_REDIR_POST_ALL);
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

HISTORY
This option was known as CURLOPT_POST301 up to 7.19.0 as it only supported the 301 then. CURL_REDIR_POST_303 was added in 7.26.0. CURL_REDIR_* macros became long types in 8.16.0, prior to this version a long cast was necessary when passed to curl_easy_setopt(3).

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_FOLLOWLOCATION(3), CURLOPT_MAXREDIRS(3), CURLOPT_POSTFIELDS(3)