f193271cff
Install the backtrace collector very early, so that we can get the backtrace even if headers were sent from LocalSettings.php. Bug: T157392 Change-Id: I9bc732b34481c95afb5362e135a87bd4302498e2
318 lines
9.2 KiB
PHP
318 lines
9.2 KiB
PHP
<?php
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/**
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* Classes used to send headers and cookies back to the user
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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/**
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* Allow programs to request this object from WebRequest::response()
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* and handle all outputting (or lack of outputting) via it.
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* @ingroup HTTP
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*/
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class WebResponse {
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/** @var array Used to record set cookies, because PHP's setcookie() will
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* happily send an identical Set-Cookie to the client.
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*/
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protected static $setCookies = [];
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/**
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* Output an HTTP header, wrapper for PHP's header()
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* @param string $string Header to output
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* @param bool $replace Replace current similar header
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* @param null|int $http_response_code Forces the HTTP response code to the specified value.
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*/
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public function header( $string, $replace = true, $http_response_code = null ) {
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\MediaWiki\HeaderCallback::warnIfHeadersSent();
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if ( $http_response_code ) {
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header( $string, $replace, $http_response_code );
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} else {
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header( $string, $replace );
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}
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}
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/**
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* Get a response header
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* @param string $key The name of the header to get (case insensitive).
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* @return string|null The header value (if set); null otherwise.
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* @since 1.25
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*/
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public function getHeader( $key ) {
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foreach ( headers_list() as $header ) {
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list( $name, $val ) = explode( ':', $header, 2 );
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if ( !strcasecmp( $name, $key ) ) {
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return trim( $val );
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}
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}
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return null;
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}
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/**
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* Output an HTTP status code header
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* @since 1.26
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* @param int $code Status code
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*/
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public function statusHeader( $code ) {
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HttpStatus::header( $code );
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}
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/**
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* Test if headers have been sent
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* @since 1.27
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* @return bool
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*/
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public function headersSent() {
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return headers_sent();
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}
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/**
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* Set the browser cookie
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* @param string $name The name of the cookie.
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* @param string $value The value to be stored in the cookie.
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* @param int|null $expire Unix timestamp (in seconds) when the cookie should expire.
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* 0 (the default) causes it to expire $wgCookieExpiration seconds from now.
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* null causes it to be a session cookie.
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* @param array $options Assoc of additional cookie options:
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* prefix: string, name prefix ($wgCookiePrefix)
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* domain: string, cookie domain ($wgCookieDomain)
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* path: string, cookie path ($wgCookiePath)
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* secure: bool, secure attribute ($wgCookieSecure)
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* httpOnly: bool, httpOnly attribute ($wgCookieHttpOnly)
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* @since 1.22 Replaced $prefix, $domain, and $forceSecure with $options
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*/
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public function setCookie( $name, $value, $expire = 0, $options = [] ) {
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global $wgCookiePath, $wgCookiePrefix, $wgCookieDomain;
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global $wgCookieSecure, $wgCookieExpiration, $wgCookieHttpOnly;
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$options = array_filter( $options, function ( $a ) {
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return $a !== null;
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} ) + [
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'prefix' => $wgCookiePrefix,
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'domain' => $wgCookieDomain,
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'path' => $wgCookiePath,
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'secure' => $wgCookieSecure,
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'httpOnly' => $wgCookieHttpOnly,
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'raw' => false,
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];
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if ( $expire === null ) {
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$expire = 0; // Session cookie
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} elseif ( $expire == 0 && $wgCookieExpiration != 0 ) {
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$expire = time() + $wgCookieExpiration;
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}
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$func = $options['raw'] ? 'setrawcookie' : 'setcookie';
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if ( Hooks::run( 'WebResponseSetCookie', [ &$name, &$value, &$expire, &$options ] ) ) {
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$cookie = $options['prefix'] . $name;
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$data = [
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'name' => (string)$cookie,
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'value' => (string)$value,
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'expire' => (int)$expire,
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'path' => (string)$options['path'],
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'domain' => (string)$options['domain'],
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'secure' => (bool)$options['secure'],
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'httpOnly' => (bool)$options['httpOnly'],
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];
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// Per RFC 6265, key is name + domain + path
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$key = "{$data['name']}\n{$data['domain']}\n{$data['path']}";
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// If this cookie name was in the request, fake an entry in
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// self::$setCookies for it so the deleting check works right.
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if ( isset( $_COOKIE[$cookie] ) && !array_key_exists( $key, self::$setCookies ) ) {
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self::$setCookies[$key] = [];
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}
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// PHP deletes if value is the empty string; also, a past expiry is deleting
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$deleting = ( $data['value'] === '' || $data['expire'] > 0 && $data['expire'] <= time() );
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if ( $deleting && !isset( self::$setCookies[$key] ) ) { // isset( null ) is false
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wfDebugLog( 'cookie', 'already deleted ' . $func . ': "' . implode( '", "', $data ) . '"' );
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} elseif ( !$deleting && isset( self::$setCookies[$key] ) &&
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self::$setCookies[$key] === [ $func, $data ]
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) {
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wfDebugLog( 'cookie', 'already set ' . $func . ': "' . implode( '", "', $data ) . '"' );
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} else {
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wfDebugLog( 'cookie', $func . ': "' . implode( '", "', $data ) . '"' );
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if ( call_user_func_array( $func, array_values( $data ) ) ) {
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self::$setCookies[$key] = $deleting ? null : [ $func, $data ];
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}
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}
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}
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}
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/**
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* Unset a browser cookie.
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* This sets the cookie with an empty value and an expiry set to a time in the past,
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* which will cause the browser to remove any cookie with the given name, domain and
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* path from its cookie store. Options other than these (and prefix) have no effect.
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* @param string $name Cookie name
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* @param array $options Cookie options, see {@link setCookie()}
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* @since 1.27
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*/
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public function clearCookie( $name, $options = [] ) {
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$this->setCookie( $name, '', time() - 31536000 /* 1 year */, $options );
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}
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/**
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* Checks whether this request is performing cookie operations
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*
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* @return bool
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* @since 1.27
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*/
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public function hasCookies() {
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return (bool)self::$setCookies;
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}
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}
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/**
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* @ingroup HTTP
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*/
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class FauxResponse extends WebResponse {
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private $headers;
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private $cookies = [];
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private $code;
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/**
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* Stores a HTTP header
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* @param string $string Header to output
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* @param bool $replace Replace current similar header
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* @param null|int $http_response_code Forces the HTTP response code to the specified value.
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*/
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public function header( $string, $replace = true, $http_response_code = null ) {
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if ( substr( $string, 0, 5 ) == 'HTTP/' ) {
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$parts = explode( ' ', $string, 3 );
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$this->code = intval( $parts[1] );
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} else {
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list( $key, $val ) = array_map( 'trim', explode( ":", $string, 2 ) );
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$key = strtoupper( $key );
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if ( $replace || !isset( $this->headers[$key] ) ) {
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$this->headers[$key] = $val;
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}
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}
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if ( $http_response_code !== null ) {
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$this->code = intval( $http_response_code );
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}
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}
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/**
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* @since 1.26
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* @param int $code Status code
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*/
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public function statusHeader( $code ) {
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$this->code = intval( $code );
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}
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public function headersSent() {
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return false;
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}
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/**
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* @param string $key The name of the header to get (case insensitive).
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* @return string|null The header value (if set); null otherwise.
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*/
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public function getHeader( $key ) {
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$key = strtoupper( $key );
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if ( isset( $this->headers[$key] ) ) {
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return $this->headers[$key];
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}
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return null;
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}
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/**
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* Get the HTTP response code, null if not set
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*
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* @return int|null
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*/
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public function getStatusCode() {
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return $this->code;
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}
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/**
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* @param string $name The name of the cookie.
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* @param string $value The value to be stored in the cookie.
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* @param int|null $expire Ignored in this faux subclass.
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* @param array $options Ignored in this faux subclass.
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*/
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public function setCookie( $name, $value, $expire = 0, $options = [] ) {
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global $wgCookiePath, $wgCookiePrefix, $wgCookieDomain;
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global $wgCookieSecure, $wgCookieExpiration, $wgCookieHttpOnly;
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$options = array_filter( $options, function ( $a ) {
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return $a !== null;
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} ) + [
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'prefix' => $wgCookiePrefix,
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'domain' => $wgCookieDomain,
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'path' => $wgCookiePath,
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'secure' => $wgCookieSecure,
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'httpOnly' => $wgCookieHttpOnly,
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'raw' => false,
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];
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if ( $expire === null ) {
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$expire = 0; // Session cookie
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} elseif ( $expire == 0 && $wgCookieExpiration != 0 ) {
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$expire = time() + $wgCookieExpiration;
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}
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$this->cookies[$options['prefix'] . $name] = [
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'value' => (string)$value,
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'expire' => (int)$expire,
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'path' => (string)$options['path'],
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'domain' => (string)$options['domain'],
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'secure' => (bool)$options['secure'],
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'httpOnly' => (bool)$options['httpOnly'],
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'raw' => (bool)$options['raw'],
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];
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}
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/**
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* @param string $name
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* @return string|null
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*/
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public function getCookie( $name ) {
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if ( isset( $this->cookies[$name] ) ) {
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return $this->cookies[$name]['value'];
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}
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return null;
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}
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/**
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* @param string $name
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* @return array|null
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*/
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public function getCookieData( $name ) {
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if ( isset( $this->cookies[$name] ) ) {
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return $this->cookies[$name];
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}
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return null;
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}
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/**
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* @return array
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*/
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public function getCookies() {
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return $this->cookies;
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}
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}
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