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<?php
/**
* Classes used to send headers and cookies back to the user
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Allow programs to request this object from WebRequest::response()
* and handle all outputting (or lack of outputting) via it.
* @ingroup HTTP
*/
class WebResponse {
/** @var array Used to record set cookies, because PHP's setcookie() will
* happily send an identical Set-Cookie to the client.
*/
protected static $setCookies = [];
/**
* Output an HTTP header, wrapper for PHP's header()
* @param string $string Header to output
* @param bool $replace Replace current similar header
* @param null|int $http_response_code Forces the HTTP response code to the specified value.
*/
public function header( $string, $replace = true, $http_response_code = null ) {
header( $string, $replace, $http_response_code );
}
/**
* Get a response header
* @param string $key The name of the header to get (case insensitive).
* @return string|null The header value (if set); null otherwise.
* @since 1.25
*/
public function getHeader( $key ) {
foreach ( headers_list() as $header ) {
list( $name, $val ) = explode( ':', $header, 2 );
if ( !strcasecmp( $name, $key ) ) {
return trim( $val );
}
}
return null;
}
/**
* Output an HTTP status code header
* @since 1.26
* @param int $code Status code
*/
public function statusHeader( $code ) {
HttpStatus::header( $code );
}
/**
* Test if headers have been sent
* @since 1.27
* @return bool
*/
public function headersSent() {
return headers_sent();
}
/**
* Set the browser cookie
* @param string $name The name of the cookie.
* @param string $value The value to be stored in the cookie.
* @param int|null $expire Unix timestamp (in seconds) when the cookie should expire.
* 0 (the default) causes it to expire $wgCookieExpiration seconds from now.
* null causes it to be a session cookie.
* @param array $options Assoc of additional cookie options:
* prefix: string, name prefix ($wgCookiePrefix)
* domain: string, cookie domain ($wgCookieDomain)
* path: string, cookie path ($wgCookiePath)
* secure: bool, secure attribute ($wgCookieSecure)
* httpOnly: bool, httpOnly attribute ($wgCookieHttpOnly)
* raw: bool, if true uses PHP's setrawcookie() instead of setcookie()
* For backwards compatibility, if $options is not an array then it and
* the following two parameters will be interpreted as values for
* 'prefix', 'domain', and 'secure'
* @since 1.22 Replaced $prefix, $domain, and $forceSecure with $options
*/
public function setCookie( $name, $value, $expire = 0, $options = [] ) {
global $wgCookiePath, $wgCookiePrefix, $wgCookieDomain;
global $wgCookieSecure, $wgCookieExpiration, $wgCookieHttpOnly;
if ( !is_array( $options ) ) {
// Backwards compatibility
$options = [ 'prefix' => $options ];
if ( func_num_args() >= 5 ) {
$options['domain'] = func_get_arg( 4 );
}
if ( func_num_args() >= 6 ) {
$options['secure'] = func_get_arg( 5 );
}
}
$options = array_filter( $options, function ( $a ) {
return $a !== null;
} ) + [
'prefix' => $wgCookiePrefix,
'domain' => $wgCookieDomain,
'path' => $wgCookiePath,
'secure' => $wgCookieSecure,
'httpOnly' => $wgCookieHttpOnly,
'raw' => false,
];
if ( $expire === null ) {
$expire = 0; // Session cookie
} elseif ( $expire == 0 && $wgCookieExpiration != 0 ) {
$expire = time() + $wgCookieExpiration;
}
$func = $options['raw'] ? 'setrawcookie' : 'setcookie';
if ( Hooks::run( 'WebResponseSetCookie', [ &$name, &$value, &$expire, &$options ] ) ) {
$cookie = $options['prefix'] . $name;
$data = [
'name' => (string)$cookie,
'value' => (string)$value,
'expire' => (int)$expire,
'path' => (string)$options['path'],
'domain' => (string)$options['domain'],
'secure' => (bool)$options['secure'],
'httpOnly' => (bool)$options['httpOnly'],
];
// Per RFC 6265, key is name + domain + path
$key = "{$data['name']}\n{$data['domain']}\n{$data['path']}";
// If this cookie name was in the request, fake an entry in
// self::$setCookies for it so the deleting check works right.
if ( isset( $_COOKIE[$cookie] ) && !array_key_exists( $key, self::$setCookies ) ) {
self::$setCookies[$key] = [];
}
// PHP deletes if value is the empty string; also, a past expiry is deleting
$deleting = ( $data['value'] === '' || $data['expire'] > 0 && $data['expire'] <= time() );
if ( $deleting && !isset( self::$setCookies[$key] ) ) { // isset( null ) is false
wfDebugLog( 'cookie', 'already deleted ' . $func . ': "' . implode( '", "', $data ) . '"' );
} elseif ( !$deleting && isset( self::$setCookies[$key] ) &&
self::$setCookies[$key] === [ $func, $data ]
) {
wfDebugLog( 'cookie', 'already set ' . $func . ': "' . implode( '", "', $data ) . '"' );
} else {
wfDebugLog( 'cookie', $func . ': "' . implode( '", "', $data ) . '"' );
if ( call_user_func_array( $func, array_values( $data ) ) ) {
self::$setCookies[$key] = $deleting ? null : [ $func, $data ];
}
}
}
}
/**
* Unset a browser cookie.
* This sets the cookie with an empty value and an expiry set to a time in the past,
* which will cause the browser to remove any cookie with the given name, domain and
* path from its cookie store. Options other than these (and prefix) have no effect.
* @param string $name Cookie name
* @param array $options Cookie options, see {@link setCookie()}
* @since 1.27
*/
public function clearCookie( $name, $options = [] ) {
$this->setCookie( $name, '', time() - 31536000 /* 1 year */, $options );
}
/**
* Checks whether this request is performing cookie operations
*
* @return bool
* @since 1.27
*/
public function hasCookies() {
return (bool)self::$setCookies;
}
}
/**
* @ingroup HTTP
*/
class FauxResponse extends WebResponse {
private $headers;
private $cookies = [];
private $code;
/**
* Stores a HTTP header
* @param string $string Header to output
* @param bool $replace Replace current similar header
* @param null|int $http_response_code Forces the HTTP response code to the specified value.
*/
public function header( $string, $replace = true, $http_response_code = null ) {
if ( substr( $string, 0, 5 ) == 'HTTP/' ) {
$parts = explode( ' ', $string, 3 );
$this->code = intval( $parts[1] );
} else {
list( $key, $val ) = array_map( 'trim', explode( ":", $string, 2 ) );
$key = strtoupper( $key );
if ( $replace || !isset( $this->headers[$key] ) ) {
$this->headers[$key] = $val;
}
}
if ( $http_response_code !== null ) {
$this->code = intval( $http_response_code );
}
}
/**
* @since 1.26
* @param int $code Status code
*/
public function statusHeader( $code ) {
$this->code = intval( $code );
}
public function headersSent() {
return false;
}
/**
* @param string $key The name of the header to get (case insensitive).
* @return string|null The header value (if set); null otherwise.
*/
public function getHeader( $key ) {
$key = strtoupper( $key );
if ( isset( $this->headers[$key] ) ) {
return $this->headers[$key];
}
return null;
}
/**
* Get the HTTP response code, null if not set
*
* @return int|null
*/
public function getStatusCode() {
return $this->code;
}
/**
* @param string $name The name of the cookie.
* @param string $value The value to be stored in the cookie.
* @param int|null $expire Ignored in this faux subclass.
* @param array $options Ignored in this faux subclass.
*/
public function setCookie( $name, $value, $expire = 0, $options = [] ) {
global $wgCookiePath, $wgCookiePrefix, $wgCookieDomain;
global $wgCookieSecure, $wgCookieExpiration, $wgCookieHttpOnly;
if ( !is_array( $options ) ) {
// Backwards compatibility
$options = [ 'prefix' => $options ];
if ( func_num_args() >= 5 ) {
$options['domain'] = func_get_arg( 4 );
}
if ( func_num_args() >= 6 ) {
$options['secure'] = func_get_arg( 5 );
}
}
$options = array_filter( $options, function ( $a ) {
return $a !== null;
} ) + [
'prefix' => $wgCookiePrefix,
'domain' => $wgCookieDomain,
'path' => $wgCookiePath,
'secure' => $wgCookieSecure,
'httpOnly' => $wgCookieHttpOnly,
'raw' => false,
];
if ( $expire === null ) {
$expire = 0; // Session cookie
} elseif ( $expire == 0 && $wgCookieExpiration != 0 ) {
$expire = time() + $wgCookieExpiration;
}
$this->cookies[$options['prefix'] . $name] = [
'value' => (string)$value,
'expire' => (int)$expire,
'path' => (string)$options['path'],
'domain' => (string)$options['domain'],
'secure' => (bool)$options['secure'],
'httpOnly' => (bool)$options['httpOnly'],
'raw' => (bool)$options['raw'],
];
}
/**
* @param string $name
* @return string|null
*/
public function getCookie( $name ) {
if ( isset( $this->cookies[$name] ) ) {
return $this->cookies[$name]['value'];
}
return null;
}
/**
* @param string $name
* @return array|null
*/
public function getCookieData( $name ) {
if ( isset( $this->cookies[$name] ) ) {
return $this->cookies[$name];
}
return null;
}
/**
* @return array
*/
public function getCookies() {
return $this->cookies;
}
}