mirror of
https://github.com/moparisthebest/curl
synced 2024-12-22 16:18:48 -05:00
111 lines
4.6 KiB
Groff
111 lines
4.6 KiB
Groff
.\" **************************************************************************
|
|
.\" * _ _ ____ _
|
|
.\" * Project ___| | | | _ \| |
|
|
.\" * / __| | | | |_) | |
|
|
.\" * | (__| |_| | _ <| |___
|
|
.\" * \___|\___/|_| \_\_____|
|
|
.\" *
|
|
.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
.\" *
|
|
.\" * This software is licensed as described in the file COPYING, which
|
|
.\" * you should have received as part of this distribution. The terms
|
|
.\" * are also available at https://curl.haxx.se/docs/copyright.html.
|
|
.\" *
|
|
.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
.\" * copies of the Software, and permit persons to whom the Software is
|
|
.\" * furnished to do so, under the terms of the COPYING file.
|
|
.\" *
|
|
.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
.\" * KIND, either express or implied.
|
|
.\" *
|
|
.\" **************************************************************************
|
|
.\"
|
|
.TH CURLOPT_HTTPHEADER 3 "17 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
|
|
.SH NAME
|
|
CURLOPT_HTTPHEADER \- set custom HTTP headers
|
|
.SH SYNOPSIS
|
|
#include <curl/curl.h>
|
|
|
|
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTPHEADER, struct curl_slist *headers);
|
|
.SH DESCRIPTION
|
|
Pass a pointer to a linked list of HTTP headers to pass to the server and/or
|
|
proxy in your HTTP request. The same list can be used for both host and proxy
|
|
requests!
|
|
|
|
The linked list should be a fully valid list of \fBstruct curl_slist\fP
|
|
structs properly filled in. Use \fIcurl_slist_append(3)\fP to create the list
|
|
and \fIcurl_slist_free_all(3)\fP to clean up an entire list. If you add a
|
|
header that is otherwise generated and used by libcurl internally, your added
|
|
one will be used instead. If you add a header with no content as in 'Accept:'
|
|
(no data on the right side of the colon), the internally used header will get
|
|
disabled. With this option you can add new headers, replace internal headers
|
|
and remove internal headers. To add a header with no content (nothing to the
|
|
right side of the colon), use the form 'MyHeader;' (note the ending
|
|
semicolon).
|
|
|
|
The headers included in the linked list \fBmust not\fP be CRLF-terminated,
|
|
because libcurl adds CRLF after each header item. Failure to comply with this
|
|
will result in strange bugs because the server will most likely ignore part of
|
|
the headers you specified.
|
|
|
|
The first line in a request (containing the method, usually a GET or POST) is
|
|
not a header and cannot be replaced using this option. Only the lines
|
|
following the request-line are headers. Adding this method line in this list
|
|
of headers will only cause your request to send an invalid header. Use
|
|
\fICURLOPT_CUSTOMREQUEST(3)\fP to change the method.
|
|
|
|
When this option is passed to \fIcurl_easy_setopt(3)\fP, libcurl will not copy
|
|
the entire list so you \fBmust\fP keep it around until you no longer use this
|
|
\fIhandle\fP for a transfer before you call \fIcurl_slist_free_all(3)\fP on
|
|
the list.
|
|
|
|
Pass a NULL to this option to reset back to no custom headers.
|
|
|
|
The most commonly replaced headers have "shortcuts" in the options
|
|
\fICURLOPT_COOKIE(3)\fP, \fICURLOPT_USERAGENT(3)\fP and
|
|
\fICURLOPT_REFERER(3)\fP. We recommend using those.
|
|
|
|
There's an alternative option that sets or replaces headers only for requests
|
|
that are sent with CONNECT to a proxy: \fICURLOPT_PROXYHEADER(3)\fP. Use
|
|
\fICURLOPT_HEADEROPT(3)\fP to control the behavior.
|
|
.SH SECURITY CONCERNS
|
|
By default, this option makes libcurl send the given headers in all HTTP
|
|
requests done by this handle. You should therefore use this option with
|
|
caution if you for example connect to the remote site using a proxy and a
|
|
CONNECT request, you should to consider if that proxy is supposed to also get
|
|
the headers. They may be private or otherwise sensitive to leak.
|
|
|
|
Use \fICURLOPT_HEADEROPT(3)\fP to make the headers only get sent to where you
|
|
intend them to get sent.
|
|
.SH DEFAULT
|
|
NULL
|
|
.SH PROTOCOLS
|
|
HTTP
|
|
.SH EXAMPLE
|
|
.nf
|
|
CURL *curl = curl_easy_init();
|
|
|
|
struct curl_slist *list = NULL;
|
|
|
|
if(curl) {
|
|
curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
|
|
|
|
list = curl_slist_append(list, "Shoesize: 10");
|
|
list = curl_slist_append(list, "Accept:");
|
|
|
|
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
|
|
|
|
curl_easy_perform(curl);
|
|
|
|
curl_slist_free_all(list); /* free the list again */
|
|
}
|
|
.fi
|
|
|
|
.SH AVAILABILITY
|
|
As long as HTTP is enabled
|
|
.SH RETURN VALUE
|
|
Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.
|
|
.SH "SEE ALSO"
|
|
.BR CURLOPT_CUSTOMREQUEST "(3), " CURLOPT_HEADEROPT "(3), "
|
|
.BR CURLOPT_PROXYHEADER "(3), " CURLOPT_HEADER "(3)"
|