WebRequest.php

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<?php
class WebRequest {
        protected $data, $headers = array();

        private $response;

        private $ip;

        public function __construct() {
                $this->checkMagicQuotes();

                // POST overrides GET data
                // We don't use $_REQUEST here to avoid interference from cookies...
                $this->data = $_POST + $_GET;
        }

        public static function getPathInfo( $want = 'all' ) {
                global $wgUsePathInfo;
                // PATH_INFO is mangled due to http://bugs.php.net/bug.php?id=31892
                // And also by Apache 2.x, double slashes are converted to single slashes.
                // So we will use REQUEST_URI if possible.
                $matches = array();
                if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
                        // Slurp out the path portion to examine...
                        $url = $_SERVER['REQUEST_URI'];
                        if ( !preg_match( '!^https?://!', $url ) ) {
                                $url = 'http://unused' . $url;
                        }
                        wfSuppressWarnings();
                        $a = parse_url( $url );
                        wfRestoreWarnings();
                        if( $a ) {
                                $path = isset( $a['path'] ) ? $a['path'] : '';

                                global $wgScript;
                                if( $path == $wgScript && $want !== 'all' ) {
                                        // Script inside a rewrite path?
                                        // Abort to keep from breaking...
                                        return $matches;
                                }

                                $router = new PathRouter;

                                // Raw PATH_INFO style
                                $router->add( "$wgScript/$1" );

                                if( isset( $_SERVER['SCRIPT_NAME'] )
                                        && preg_match( '/\.php5?/', $_SERVER['SCRIPT_NAME'] ) )
                                {
                                        # Check for SCRIPT_NAME, we handle index.php explicitly
                                        # But we do have some other .php files such as img_auth.php
                                        # Don't let root article paths clober the parsing for them
                                        $router->add( $_SERVER['SCRIPT_NAME'] . "/$1" );
                                }

                                global $wgArticlePath;
                                if( $wgArticlePath ) {
                                        $router->add( $wgArticlePath );
                                }

                                global $wgActionPaths;
                                if( $wgActionPaths ) {
                                        $router->add( $wgActionPaths, array( 'action' => '$key' ) );
                                }

                                global $wgVariantArticlePath, $wgContLang;
                                if( $wgVariantArticlePath ) {
                                        $router->add( $wgVariantArticlePath,
                                                array( 'variant' => '$2' ),
                                                array( '$2' => $wgContLang->getVariants() )
                                        );
                                }

                                wfRunHooks( 'WebRequestPathInfoRouter', array( $router ) );

                                $matches = $router->parse( $path );
                        }
                } elseif ( $wgUsePathInfo ) {
                        if ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
                                // Mangled PATH_INFO
                                // http://bugs.php.net/bug.php?id=31892
                                // Also reported when ini_get('cgi.fix_pathinfo')==false
                                $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );

                        } elseif ( isset( $_SERVER['PATH_INFO'] ) && $_SERVER['PATH_INFO'] != '' ) {
                                // Regular old PATH_INFO yay
                                $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
                        }
                }

                return $matches;
        }

        public static function detectServer() {
                list( $proto, $stdPort ) = self::detectProtocolAndStdPort();

                $varNames = array( 'HTTP_HOST', 'SERVER_NAME', 'HOSTNAME', 'SERVER_ADDR' );
                $host = 'localhost';
                $port = $stdPort;
                foreach ( $varNames as $varName ) {
                        if ( !isset( $_SERVER[$varName] ) ) {
                                continue;
                        }
                        $parts = IP::splitHostAndPort( $_SERVER[$varName] );
                        if ( !$parts ) {
                                // Invalid, do not use
                                continue;
                        }
                        $host = $parts[0];
                        if ( $parts[1] === false ) {
                                if ( isset( $_SERVER['SERVER_PORT'] ) ) {
                                        $port = $_SERVER['SERVER_PORT'];
                                } // else leave it as $stdPort
                        } else {
                                $port = $parts[1];
                        }
                        break;
                }

                return $proto . '://' . IP::combineHostAndPort( $host, $port, $stdPort );
        }

        public static function detectProtocolAndStdPort() {
                if ( ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] == 'on' ) ||
                        ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) &&
                        $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ) ) {
                        $arr = array( 'https', 443 );
                } else {
                        $arr = array( 'http', 80 );
                }
                return $arr;
        }

        public static function detectProtocol() {
                list( $proto, ) = self::detectProtocolAndStdPort();
                return $proto;
        }

        public function interpolateTitle() {
                // bug 16019: title interpolation on API queries is useless and sometimes harmful
                if ( defined( 'MW_API' ) ) {
                        return;
                }

                $matches = self::getPathInfo( 'title' );
                foreach( $matches as $key => $val) {
                        $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
                }
        }

        static function extractTitle( $path, $bases, $key = false ) {
                foreach( (array)$bases as $keyValue => $base ) {
                        // Find the part after $wgArticlePath
                        $base = str_replace( '$1', '', $base );
                        $baseLen = strlen( $base );
                        if( substr( $path, 0, $baseLen ) == $base ) {
                                $raw = substr( $path, $baseLen );
                                if( $raw !== '' ) {
                                        $matches = array( 'title' => rawurldecode( $raw ) );
                                        if( $key ) {
                                                $matches[$key] = $keyValue;
                                        }
                                        return $matches;
                                }
                        }
                }
                return array();
        }

        private function &fix_magic_quotes( &$arr, $topLevel = true ) {
                $clean = array();
                foreach( $arr as $key => $val ) {
                        if( is_array( $val ) ) {
                                $cleanKey = $topLevel ? stripslashes( $key ) : $key;
                                $clean[$cleanKey] = $this->fix_magic_quotes( $arr[$key], false );
                        } else {
                                $cleanKey = stripslashes( $key );
                                $clean[$cleanKey] = stripslashes( $val );
                        }
                }
                $arr = $clean;
                return $arr;
        }

        private function checkMagicQuotes() {
                $mustFixQuotes = function_exists( 'get_magic_quotes_gpc' )
                        && get_magic_quotes_gpc();
                if( $mustFixQuotes ) {
                        $this->fix_magic_quotes( $_COOKIE );
                        $this->fix_magic_quotes( $_ENV );
                        $this->fix_magic_quotes( $_GET );
                        $this->fix_magic_quotes( $_POST );
                        $this->fix_magic_quotes( $_REQUEST );
                        $this->fix_magic_quotes( $_SERVER );
                }
        }

        function normalizeUnicode( $data ) {
                if( is_array( $data ) ) {
                        foreach( $data as $key => $val ) {
                                $data[$key] = $this->normalizeUnicode( $val );
                        }
                } else {
                        global $wgContLang;
                        $data = isset( $wgContLang ) ? $wgContLang->normalize( $data ) : UtfNormal::cleanUp( $data );
                }
                return $data;
        }

        private function getGPCVal( $arr, $name, $default ) {
                # PHP is so nice to not touch input data, except sometimes:
                # http://us2.php.net/variables.external#language.variables.external.dot-in-names
                # Work around PHP *feature* to avoid *bugs* elsewhere.
                $name = strtr( $name, '.', '_' );
                if( isset( $arr[$name] ) ) {
                        global $wgContLang;
                        $data = $arr[$name];
                        if( isset( $_GET[$name] ) && !is_array( $data ) ) {
                                # Check for alternate/legacy character encoding.
                                if( isset( $wgContLang ) ) {
                                        $data = $wgContLang->checkTitleEncoding( $data );
                                }
                        }
                        $data = $this->normalizeUnicode( $data );
                        return $data;
                } else {
                        taint( $default );
                        return $default;
                }
        }

        public function getVal( $name, $default = null ) {
                $val = $this->getGPCVal( $this->data, $name, $default );
                if( is_array( $val ) ) {
                        $val = $default;
                }
                if( is_null( $val ) ) {
                        return $val;
                } else {
                        return (string)$val;
                }
        }

        public function setVal( $key, $value ) {
                $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
                $this->data[$key] = $value;
                return $ret;
        }

        public function unsetVal( $key ) {
                if ( !isset( $this->data[$key] ) ) {
                        $ret = null;
                } else {
                        $ret = $this->data[$key];
                        unset( $this->data[$key] );
                }
                return $ret;
        }

        public function getArray( $name, $default = null ) {
                $val = $this->getGPCVal( $this->data, $name, $default );
                if( is_null( $val ) ) {
                        return null;
                } else {
                        return (array)$val;
                }
        }

        public function getIntArray( $name, $default = null ) {
                $val = $this->getArray( $name, $default );
                if( is_array( $val ) ) {
                        $val = array_map( 'intval', $val );
                }
                return $val;
        }

        public function getInt( $name, $default = 0 ) {
                return intval( $this->getVal( $name, $default ) );
        }

        public function getIntOrNull( $name ) {
                $val = $this->getVal( $name );
                return is_numeric( $val )
                        ? intval( $val )
                        : null;
        }

        public function getBool( $name, $default = false ) {
                return (bool)$this->getVal( $name, $default );
        }

        public function getFuzzyBool( $name, $default = false ) {
                return $this->getBool( $name, $default ) && strcasecmp( $this->getVal( $name ), 'false' ) !== 0;
        }

        public function getCheck( $name ) {
                # Checkboxes and buttons are only present when clicked
                # Presence connotes truth, absence false
                return $this->getVal( $name, null ) !== null;
        }

        public function getText( $name, $default = '' ) {
                global $wgContLang;
                $val = $this->getVal( $name, $default );
                return str_replace( "\r\n", "\n",
                        $wgContLang->recodeInput( $val ) );
        }

        public function getValues() {
                $names = func_get_args();
                if ( count( $names ) == 0 ) {
                        $names = array_keys( $this->data );
                }

                $retVal = array();
                foreach ( $names as $name ) {
                        $value = $this->getGPCVal( $this->data, $name, null );
                        if ( !is_null( $value ) ) {
                                $retVal[$name] = $value;
                        }
                }
                return $retVal;
        }

        public function getValueNames( $exclude = array() ) {
                return array_diff( array_keys( $this->getValues() ), $exclude );
        }

        public function getQueryValues() {
                return $_GET;
        }

        public function getMethod() {
                return isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : 'GET';
        }

        public function wasPosted() {
                return $this->getMethod() == 'POST';
        }

        public function checkSessionCookie() {
                return isset( $_COOKIE[ session_name() ] );
        }

        public function getCookie( $key, $prefix = null, $default = null ) {
                if( $prefix === null ) {
                        global $wgCookiePrefix;
                        $prefix = $wgCookiePrefix;
                }
                return $this->getGPCVal( $_COOKIE, $prefix . $key, $default );
        }

        public function getRequestURL() {
                if( isset( $_SERVER['REQUEST_URI'] ) && strlen( $_SERVER['REQUEST_URI'] ) ) {
                        $base = $_SERVER['REQUEST_URI'];
                } elseif ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) && strlen( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
                        // Probably IIS; doesn't set REQUEST_URI
                        $base = $_SERVER['HTTP_X_ORIGINAL_URL'];
                } elseif( isset( $_SERVER['SCRIPT_NAME'] ) ) {
                        $base = $_SERVER['SCRIPT_NAME'];
                        if( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
                                $base .= '?' . $_SERVER['QUERY_STRING'];
                        }
                } else {
                        // This shouldn't happen!
                        throw new MWException( "Web server doesn't provide either " .
                                "REQUEST_URI, HTTP_X_ORIGINAL_URL or SCRIPT_NAME. Report details " .
                                "of your web server configuration to http://bugzilla.wikimedia.org/" );
                }
                // User-agents should not send a fragment with the URI, but
                // if they do, and the web server passes it on to us, we
                // need to strip it or we get false-positive redirect loops
                // or weird output URLs
                $hash = strpos( $base, '#' );
                if( $hash !== false ) {
                        $base = substr( $base, 0, $hash );
                }
                if( $base[0] == '/' ) {
                        return $base;
                } else {
                        // We may get paths with a host prepended; strip it.
                        return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
                }
        }

        public function getFullRequestURL() {
                return wfExpandUrl( $this->getRequestURL(), PROTO_CURRENT );
        }

        public function appendQuery( $query ) {
                return $this->appendQueryArray( wfCgiToArray( $query ) );
        }

        public function escapeAppendQuery( $query ) {
                return htmlspecialchars( $this->appendQuery( $query ) );
        }

        public function appendQueryValue( $key, $value, $onlyquery = false ) {
                return $this->appendQueryArray( array( $key => $value ), $onlyquery );
        }

        public function appendQueryArray( $array, $onlyquery = false ) {
                global $wgTitle;
                $newquery = $this->getQueryValues();
                unset( $newquery['title'] );
                $newquery = array_merge( $newquery, $array );
                $query = wfArrayToCgi( $newquery );
                return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
        }

        public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
                global $wgUser;

                $limit = $this->getInt( 'limit', 0 );
                if( $limit < 0 ) {
                        $limit = 0;
                }
                if( ( $limit == 0 ) && ( $optionname != '' ) ) {
                        $limit = $wgUser->getIntOption( $optionname );
                }
                if( $limit <= 0 ) {
                        $limit = $deflimit;
                }
                if( $limit > 5000 ) {
                        $limit = 5000; # We have *some* limits...
                }

                $offset = $this->getInt( 'offset', 0 );
                if( $offset < 0 ) {
                        $offset = 0;
                }

                return array( $limit, $offset );
        }

        public function getFileTempname( $key ) {
                $file = new WebRequestUpload( $this, $key );
                return $file->getTempName();
        }

        public function getFileSize( $key ) {
                wfDeprecated( __METHOD__, '1.17' );
                $file = new WebRequestUpload( $this, $key );
                return $file->getSize();
        }

        public function getUploadError( $key ) {
                $file = new WebRequestUpload( $this, $key );
                return $file->getError();
        }

        public function getFileName( $key ) {
                $file = new WebRequestUpload( $this, $key );
                return $file->getName();
        }

        public function getUpload( $key ) {
                return new WebRequestUpload( $this, $key );
        }

        public function response() {
                /* Lazy initialization of response object for this request */
                if ( !is_object( $this->response ) ) {
                        $class = ( $this instanceof FauxRequest ) ? 'FauxResponse' : 'WebResponse';
                        $this->response = new $class();
                }
                return $this->response;
        }

        private function initHeaders() {
                if ( count( $this->headers ) ) {
                        return;
                }

                if ( function_exists( 'apache_request_headers' ) ) {
                        foreach ( apache_request_headers() as $tempName => $tempValue ) {
                                $this->headers[ strtoupper( $tempName ) ] = $tempValue;
                        }
                } else {
                        foreach ( $_SERVER as $name => $value ) {
                                if ( substr( $name, 0, 5 ) === 'HTTP_' ) {
                                        $name = str_replace( '_', '-', substr( $name, 5 ) );
                                        $this->headers[$name] = $value;
                                } elseif ( $name === 'CONTENT_LENGTH' ) {
                                        $this->headers['CONTENT-LENGTH'] = $value;
                                }
                        }
                }
        }

        public function getAllHeaders() {
                $this->initHeaders();
                return $this->headers;
        }

        public function getHeader( $name ) {
                $this->initHeaders();
                $name = strtoupper( $name );
                if ( isset( $this->headers[$name] ) ) {
                        return $this->headers[$name];
                } else {
                        return false;
                }
        }

        public function getSessionData( $key ) {
                if( !isset( $_SESSION[$key] ) ) {
                        return null;
                }
                return $_SESSION[$key];
        }

        public function setSessionData( $key, $data ) {
                $_SESSION[$key] = $data;
        }

        public function checkUrlExtension( $extWhitelist = array() ) {
                global $wgScriptExtension;
                $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
                if ( IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist ) ) {
                        if ( !$this->wasPosted() ) {
                                $newUrl = IEUrlExtension::fixUrlForIE6(
                                        $this->getFullRequestURL(), $extWhitelist );
                                if ( $newUrl !== false ) {
                                        $this->doSecurityRedirect( $newUrl );
                                        return false;
                                }
                        }
                        throw new HttpError( 403,
                                'Invalid file extension found in the path info or query string.' );
                }
                return true;
        }

        protected function doSecurityRedirect( $url ) {
                header( 'Location: ' . $url );
                header( 'Content-Type: text/html' );
                $encUrl = htmlspecialchars( $url );
                echo <<<HTML
<html>
<head>
<title>Security redirect</title>
</head>
<body>
<h1>Security redirect</h1>
<p>
We can't serve non-HTML content from the URL you have requested, because
Internet Explorer would interpret it as an incorrect and potentially dangerous
content type.</p>
<p>Instead, please use <a href="$encUrl">this URL</a>, which is the same as the URL you have requested, except that
"&amp;*" is appended. This prevents Internet Explorer from seeing a bogus file
extension.
</p>
</body>
</html>
HTML;
                echo "\n";
                return true;
        }

        public function isPathInfoBad( $extWhitelist = array() ) {
                wfDeprecated( __METHOD__, '1.17' );
                global $wgScriptExtension;
                $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
                return IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist );
        }

        public function getAcceptLang() {
                // Modified version of code found at http://www.thefutureoftheweb.com/blog/use-accept-language-header
                $acceptLang = $this->getHeader( 'Accept-Language' );
                if ( !$acceptLang ) {
                        return array();
                }

                // Return the language codes in lower case
                $acceptLang = strtolower( $acceptLang );

                // Break up string into pieces (languages and q factors)
                $lang_parse = null;
                preg_match_all( '/([a-z]{1,8}(-[a-z]{1,8})*|\*)\s*(;\s*q\s*=\s*(1(\.0{0,3})?|0(\.[0-9]{0,3})?)?)?/',
                        $acceptLang, $lang_parse );

                if ( !count( $lang_parse[1] ) ) {
                        return array();
                }

                $langcodes = $lang_parse[1];
                $qvalues = $lang_parse[4];
                $indices = range( 0, count( $lang_parse[1] ) - 1 );

                // Set default q factor to 1
                foreach ( $indices as $index ) {
                        if ( $qvalues[$index] === '' ) {
                                $qvalues[$index] = 1;
                        } elseif ( $qvalues[$index] == 0 ) {
                                unset( $langcodes[$index], $qvalues[$index], $indices[$index] );
                        }
                }

                // Sort list. First by $qvalues, then by order. Reorder $langcodes the same way
                array_multisort( $qvalues, SORT_DESC, SORT_NUMERIC, $indices, $langcodes );

                // Create a list like "en" => 0.8
                $langs = array_combine( $langcodes, $qvalues );

                return $langs;
        }

        protected function getRawIP() {
                if ( !isset( $_SERVER['REMOTE_ADDR'] ) ) {
                        return null;
                }

                if ( is_array( $_SERVER['REMOTE_ADDR'] ) || strpos( $_SERVER['REMOTE_ADDR'], ',' ) !== false ) {
                        throw new MWException( __METHOD__ . " : Could not determine the remote IP address due to multiple values." );
                } else {
                        $ipchain = $_SERVER['REMOTE_ADDR'];
                }

                return IP::canonicalize( $ipchain );
        }

        public function getIP() {
                global $wgUsePrivateIPs;

                # Return cached result
                if ( $this->ip !== null ) {
                        return $this->ip;
                }

                # collect the originating ips
                $ip = $this->getRawIP();

                # Append XFF
                $forwardedFor = $this->getHeader( 'X-Forwarded-For' );
                if ( $forwardedFor !== false ) {
                        $ipchain = array_map( 'trim', explode( ',', $forwardedFor ) );
                        $ipchain = array_reverse( $ipchain );
                        if ( $ip ) {
                                array_unshift( $ipchain, $ip );
                        }

                        # Step through XFF list and find the last address in the list which is a trusted server
                        # Set $ip to the IP address given by that trusted server, unless the address is not sensible (e.g. private)
                        foreach ( $ipchain as $i => $curIP ) {
                                $curIP = IP::canonicalize( $curIP );
                                if ( wfIsTrustedProxy( $curIP ) ) {
                                        if ( isset( $ipchain[$i + 1] ) ) {
                                                if ( $wgUsePrivateIPs || IP::isPublic( $ipchain[$i + 1 ] ) ) {
                                                        $ip = $ipchain[$i + 1];
                                                }
                                        }
                                } else {
                                        break;
                                }
                        }
                }

                # Allow extensions to improve our guess
                wfRunHooks( 'GetIP', array( &$ip ) );

                if ( !$ip ) {
                        throw new MWException( "Unable to determine IP" );
                }

                wfDebug( "IP: $ip\n" );
                $this->ip = $ip;
                return $ip;
        }

        public function setIP( $ip ) {
                $this->ip = $ip;
        }
}

class WebRequestUpload {
        protected $request;
        protected $doesExist;
        protected $fileInfo;

        public function __construct( $request, $key ) {
                $this->request = $request;
                $this->doesExist = isset( $_FILES[$key] );
                if ( $this->doesExist ) {
                        $this->fileInfo = $_FILES[$key];
                }
        }

        public function exists() {
                return $this->doesExist;
        }

        public function getName() {
                if ( !$this->exists() ) {
                        return null;
                }

                global $wgContLang;
                $name = $this->fileInfo['name'];

                # Safari sends filenames in HTML-encoded Unicode form D...
                # Horrid and evil! Let's try to make some kind of sense of it.
                $name = Sanitizer::decodeCharReferences( $name );
                $name = $wgContLang->normalize( $name );
                wfDebug( __METHOD__ . ": {$this->fileInfo['name']} normalized to '$name'\n" );
                return $name;
        }

        public function getSize() {
                if ( !$this->exists() ) {
                        return 0;
                }

                return $this->fileInfo['size'];
        }

        public function getTempName() {
                if ( !$this->exists() ) {
                        return null;
                }

                return $this->fileInfo['tmp_name'];
        }

        public function getError() {
                if ( !$this->exists() ) {
                        return 0; # UPLOAD_ERR_OK
                }

                return $this->fileInfo['error'];
        }

        public function isIniSizeOverflow() {
                if ( $this->getError() == UPLOAD_ERR_INI_SIZE ) {
                        # PHP indicated that upload_max_filesize is exceeded
                        return true;
                }

                $contentLength = $this->request->getHeader( 'CONTENT_LENGTH' );
                if ( $contentLength > wfShorthandToInteger( ini_get( 'post_max_size' ) ) ) {
                        # post_max_size is exceeded
                        return true;
                }

                return false;
        }
}

class FauxRequest extends WebRequest {
        private $wasPosted = false;
        private $session = array();

        public function __construct( $data = array(), $wasPosted = false, $session = null ) {
                if( is_array( $data ) ) {
                        $this->data = $data;
                } else {
                        throw new MWException( "FauxRequest() got bogus data" );
                }
                $this->wasPosted = $wasPosted;
                if( $session ) {
                        $this->session = $session;
                }
        }

        private function notImplemented( $method ) {
                throw new MWException( "{$method}() not implemented" );
        }

        public function getText( $name, $default = '' ) {
                # Override; don't recode since we're using internal data
                return (string)$this->getVal( $name, $default );
        }

        public function getValues() {
                return $this->data;
        }

        public function getQueryValues() {
                if ( $this->wasPosted ) {
                        return array();
                } else {
                        return $this->data;
                }
        }

        public function getMethod() {
                return $this->wasPosted ? 'POST' : 'GET';
        }

        public function wasPosted() {
                return $this->wasPosted;
        }

        public function getCookie( $key, $prefix = null, $default = null ) {
                return $default;
        }

        public function checkSessionCookie() {
                return false;
        }

        public function getRequestURL() {
                $this->notImplemented( __METHOD__ );
        }

        public function getHeader( $name ) {
                return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
        }

        public function setHeader( $name, $val ) {
                $this->headers[$name] = $val;
        }

        public function getSessionData( $key ) {
                if( isset( $this->session[$key] ) ) {
                        return $this->session[$key];
                }
                return null;
        }

        public function setSessionData( $key, $data ) {
                $this->session[$key] = $data;
        }

        public function getSessionArray() {
                return $this->session;
        }

        public function isPathInfoBad( $extWhitelist = array() ) {
                return false;
        }

        public function checkUrlExtension( $extWhitelist = array() ) {
                return true;
        }

        protected function getRawIP() {
                return '127.0.0.1';
        }
}

class DerivativeRequest extends FauxRequest {
        private $base;

        public function __construct( WebRequest $base, $data, $wasPosted = false ) {
                $this->base = $base;
                parent::__construct( $data, $wasPosted );
        }

        public function getCookie( $key, $prefix = null, $default = null ) {
                return $this->base->getCookie( $key, $prefix, $default );
        }

        public function checkSessionCookie() {
                return $this->base->checkSessionCookie();
        }

        public function getHeader( $name ) {
                return $this->base->getHeader( $name );
        }

        public function getAllHeaders() {
                return $this->base->getAllHeaders();
        }

        public function getSessionData( $key ) {
                return $this->base->getSessionData( $key );
        }

        public function setSessionData( $key, $data ) {
                $this->base->setSessionData( $key, $data );
        }

        public function getAcceptLang() {
                return $this->base->getAcceptLang();
        }

        public function getIP() {
                return $this->base->getIP();
        }
}