docs/libcurl/opts/CURLOPT_POSTREDIR.3

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.TH CURLOPT_POSTREDIR 3 "September 16, 2020" "libcurl 7.73.0" "curl_easy_setopt options"

.SH NAME
CURLOPT_POSTREDIR \- how to act on an HTTP POST redirect
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTREDIR,
                          long bitmask);
.SH 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
\fBCURL_REDIR_POST_301\fP) 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 \fBCURL_REDIR_POST_302\fP) makes
libcurl maintain the request method after a 302 redirect whilst setting bit 2
(value \fBCURL_REDIR_POST_303\fP) makes libcurl maintain the request method
after a 303 redirect. The value \fBCURL_REDIR_POST_ALL\fP is a convenience
define that sets all three bits.

The non-RFC behaviour 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 \fICURLOPT_FOLLOWLOCATION(3)\fP.
.SH DEFAULT
0
.SH PROTOCOLS
HTTP(S)
.SH EXAMPLE
.nf
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, CURL_REDIR_POST_ALL);

  curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.17.1. 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.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_FOLLOWLOCATION "(3), " CURLOPT_POSTFIELDS "(3), "