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d01d2ec9f1
Some CURLOPT constants defined in the curl public headers were initially enums (= ints), or macros with bare numeric values. Recent curl releases upgraded them to `long` constants, to make them pass correctly to `curl_easy_setop()` by default, i.e. without requiring a `(long)` cast. This patch drops such casts from the examples embedded in the docs. At the same time it documents which curl release made them `long` types, to keep them useful when working with previous libcurl versions. Also: - drop a `(long)` cast that was never necessary. - CURLOPT_ALTSVC_CTRL.md: bump local copy of macros to long. - test1119: make it ignore symbols ending with an underscore, to skip wildcard, e.g. `**CURLAUTH_***`. Closes #18130
90 lines
2.4 KiB
Markdown
90 lines
2.4 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_POSTREDIR
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_EFFECTIVE_METHOD (3)
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- CURLINFO_REDIRECT_COUNT (3)
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- CURLOPT_FOLLOWLOCATION (3)
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- CURLOPT_MAXREDIRS (3)
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- CURLOPT_POSTFIELDS (3)
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Protocol:
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- HTTP
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Added-in: 7.19.1
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---
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# NAME
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CURLOPT_POSTREDIR - how to act on an HTTP POST redirect
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTREDIR,
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long bitmask);
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~~~
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# DESCRIPTION
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Pass a bitmask to control how libcurl acts on redirects after POSTs that get a
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301, 302 or 303 response back. A parameter with bit 0 set (value
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**CURL_REDIR_POST_301**) tells the library to respect RFC 7231 (section
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6.4.2 to 6.4.4) and not convert POST requests into GET requests when following
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a 301 redirection. Setting bit 1 (value **CURL_REDIR_POST_302**) makes
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libcurl maintain the request method after a 302 redirect whilst setting bit 2
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(value **CURL_REDIR_POST_303**) makes libcurl maintain the request method
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after a 303 redirect. The value **CURL_REDIR_POST_ALL** is a convenience
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define that sets all three bits.
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The non-RFC behavior is ubiquitous in web browsers, so the library does the
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conversion by default to maintain consistency. However, a server may require a
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POST to remain a POST after such a redirection. This option is meaningful only
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when setting CURLOPT_FOLLOWLOCATION(3).
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# DEFAULT
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0
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* a silly POST example */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "data=true");
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/* example.com is redirected, so we tell libcurl to send POST on 301,
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302 and 303 HTTP response codes */
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curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
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curl_easy_perform(curl);
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}
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}
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~~~
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# HISTORY
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This option was known as CURLOPT_POST301 up to 7.19.0 as it only supported the
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301 then. CURL_REDIR_POST_303 was added in 7.26.0.
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**CURL_REDIR_*** macros became `long` types in 8.16.0, prior to this version
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a `long` cast was necessary when passed to curl_easy_setopt(3).
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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