curl/docs/libcurl/opts/CURLOPT_HTTP200ALIASES.md
Daniel Stenberg eefcc1bda4
docs: introduce "curldown" for libcurl man page format
curldown is this new file format for libcurl man pages. It is markdown
inspired with differences:

- Each file has a set of leading headers with meta-data
- Supports a small subset of markdown
- Uses .md file extensions for editors/IDE/GitHub to treat them nicely
- Generates man pages very similar to the previous ones
- Generates man pages that still convert nicely to HTML on the website
- Detects and highlights mentions of curl symbols automatically (when
  their man page section is specified)

tools:

- cd2nroff: converts from curldown to nroff man page
- nroff2cd: convert an (old) nroff man page to curldown
- cdall: convert many nroff pages to curldown versions
- cd2cd: verifies and updates a curldown to latest curldown

This setup generates .3 versions of all the curldown versions at build time.

CI:

Since the documentation is now technically markdown in the eyes of many
things, the CI runs many more tests and checks on this documentation,
including proselint, link checkers and tests that make sure we capitalize the
first letter after a period...

Closes #12730
2024-01-23 00:29:02 +01:00

76 lines
1.8 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_HTTP200ALIASES
Section: 3
Source: libcurl
See-also:
- CURLOPT_HTTP09_ALLOWED (3)
- CURLOPT_HTTP_VERSION (3)
---
# NAME
CURLOPT_HTTP200ALIASES - alternative matches for HTTP 200 OK
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP200ALIASES,
struct curl_slist *aliases);
~~~
# DESCRIPTION
Pass a pointer to a linked list of *aliases* to be treated as valid HTTP 200
responses. Some servers respond with a custom header response line. For
example, SHOUTcast servers respond with "ICY 200 OK". Also some old Icecast
1.3.x servers respond like that for certain user agent headers or in absence
of such. By including this string in your list of aliases, the response gets
treated as a valid HTTP header line such as "HTTP/1.0 200 OK".
The linked list should be a fully valid list of struct curl_slist structs, and
be properly filled in. Use curl_slist_append(3) to create the list and
curl_slist_free_all(3) to clean up an entire list.
The alias itself is not parsed for any version strings. The protocol is
assumed to match HTTP 1.0 when an alias match.
# DEFAULT
NULL
# PROTOCOLS
HTTP
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
struct curl_slist *list;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
list = curl_slist_append(NULL, "ICY 200 OK");
list = curl_slist_append(list, "WEIRDO 99 FINE");
curl_easy_setopt(curl, CURLOPT_HTTP200ALIASES, list);
curl_easy_perform(curl);
curl_slist_free_all(list); /* free the list again */
}
}
~~~
# AVAILABILITY
Added in 7.10.3
# RETURN VALUE
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.