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wordpress-azure/wp-includes/class-wp-http-proxy.php at master · MarcTSIVANYO/wordpress-azure · GitHub
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<?php
/**
* HTTP API: WP_HTTP_Proxy class
*
* @package WordPress
* @subpackage HTTP
* @since 4.4.0
*/
/**
* Core class used to implement HTTP API proxy support.
*
* There are caveats to proxy support. It requires that defines be made in the wp-config.php file to
* enable proxy support. There are also a few filters that plugins can hook into for some of the
* constants.
*
* Please note that only BASIC authentication is supported by most transports.
* cURL MAY support more methods (such as NTLM authentication) depending on your environment.
*
* The constants are as follows:
* <ol>
* <li>WP_PROXY_HOST - Enable proxy support and host for connecting.</li>
* <li>WP_PROXY_PORT - Proxy port for connection. No default, must be defined.</li>
* <li>WP_PROXY_USERNAME - Proxy username, if it requires authentication.</li>
* <li>WP_PROXY_PASSWORD - Proxy password, if it requires authentication.</li>
* <li>WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy.
* You do not need to have localhost and the site host in this list, because they will not be passed
* through the proxy. The list should be presented in a comma separated list, wildcards using * are supported, eg. *.wordpress.org</li>
* </ol>
*
* An example can be as seen below.
*
* define('WP_PROXY_HOST', '192.168.84.101');
* define('WP_PROXY_PORT', '8080');
* define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com, *.wordpress.org');
*
* @link https://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress.
* @link https://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_PROXY_BYPASS_HOSTS
*
* @since 2.8.0
*/
class
WP_HTTP_Proxy {
/**
* Whether proxy connection should be used.
*
* @since 2.8.0
*
* @use WP_PROXY_HOST
* @use WP_PROXY_PORT
*
* @return bool
*/
public
function
is_enabled
() {
return
defined
(
'
WP_PROXY_HOST
'
) &&
defined
(
'
WP_PROXY_PORT
'
);
}
/**
* Whether authentication should be used.
*
* @since 2.8.0
*
* @use WP_PROXY_USERNAME
* @use WP_PROXY_PASSWORD
*
* @return bool
*/
public
function
use_authentication
() {
return
defined
(
'
WP_PROXY_USERNAME
'
) &&
defined
(
'
WP_PROXY_PASSWORD
'
);
}
/**
* Retrieve the host for the proxy server.
*
* @since 2.8.0
*
* @return string
*/
public
function
host
() {
if
(
defined
(
'
WP_PROXY_HOST
'
) ) {
return
WP_PROXY_HOST
;
}
return
''
;
}
/**
* Retrieve the port for the proxy server.
*
* @since 2.8.0
*
* @return string
*/
public
function
port
() {
if
(
defined
(
'
WP_PROXY_PORT
'
) ) {
return
WP_PROXY_PORT
;
}
return
''
;
}
/**
* Retrieve the username for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public
function
username
() {
if
(
defined
(
'
WP_PROXY_USERNAME
'
) ) {
return
WP_PROXY_USERNAME
;
}
return
''
;
}
/**
* Retrieve the password for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public
function
password
() {
if
(
defined
(
'
WP_PROXY_PASSWORD
'
) ) {
return
WP_PROXY_PASSWORD
;
}
return
''
;
}
/**
* Retrieve authentication string for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public
function
authentication
() {
return
$
this
->
username
() .
'
:
'
.
$
this
->
password
();
}
/**
* Retrieve header string for proxy authentication.
*
* @since 2.8.0
*
* @return string
*/
public
function
authentication_header
() {
return
'
Proxy-Authorization: Basic
'
.
base64_encode
(
$
this
->
authentication
() );
}
/**
* Whether URL should be sent through the proxy server.
*
* We want to keep localhost and the site URL from being sent through the proxy server, because
* some proxies can not handle this. We also have the constant available for defining other
* hosts that won't be sent through the proxy.
*
* @since 2.8.0
*
* @staticvar array|null $bypass_hosts
* @staticvar array $wildcard_regex
*
* @param string $uri URI to check.
* @return bool True, to send through the proxy and false if, the proxy should not be used.
*/
public
function
send_through_proxy
(
$
uri
) {
/*
* parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
* This will be displayed on sites, which is not reasonable.
*/
$
check
= @
parse_url
(
$
uri
);
// Malformed URL, can not process, but this could mean ssl, so let through anyway.
if
(
$
check
===
false
) {
return
true
;
}
$
home
=
parse_url
(
get_option
(
'
siteurl
'
) );
/**
* Filters whether to preempt sending the request through the proxy server.
*
* Returning false will bypass the proxy; returning true will send
* the request through the proxy. Returning null bypasses the filter.
*
* @since 3.5.0
*
* @param null $override Whether to override the request result. Default null.
* @param string $uri URL to check.
* @param array $check Associative array result of parsing the URI.
* @param array $home Associative array result of parsing the site URL.
*/
$
result
=
apply_filters
(
'
pre_http_send_through_proxy
'
,
null
,
$
uri
,
$
check
,
$
home
);
if
( !
is_null
(
$
result
) ) {
return
$
result
;
}
if
(
'
localhost
'
==
$
check
[
'
host
'
] || (
isset
(
$
home
[
'
host
'
] ) &&
$
home
[
'
host
'
] ==
$
check
[
'
host
'
] ) ) {
return
false
;
}
if
( !
defined
(
'
WP_PROXY_BYPASS_HOSTS
'
) ) {
return
true
;
}
static
$
bypass_hosts
=
null
;
static
$
wildcard_regex
=
array
();
if
(
null
===
$
bypass_hosts
) {
$
bypass_hosts
=
preg_split
(
'
|,\s*|
'
,
WP_PROXY_BYPASS_HOSTS
);
if
(
false
!==
strpos
(
WP_PROXY_BYPASS_HOSTS
,
'
*
'
) ) {
$
wildcard_regex
=
array
();
foreach
(
$
bypass_hosts
as
$
host
) {
$
wildcard_regex
[] =
str_replace
(
'
\*
'
,
'
.+
'
,
preg_quote
(
$
host
,
'
/
'
) );
}
$
wildcard_regex
=
'
/^(
'
.
implode
(
'
|
'
,
$
wildcard_regex
) .
'
)$/i
'
;
}
}
if
( !
empty
(
$
wildcard_regex
) ) {
return
!
preg_match
(
$
wildcard_regex
,
$
check
[
'
host
'
] );
}
else
{
return
!
in_array
(
$
check
[
'
host
'
],
$
bypass_hosts
);
}
}
}
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