WebRequest.php

Go to the documentation of this file.

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

    private $response;

    private $ip;

    protected $protocol;

    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() {
        $proto = self::detectProtocol();
        $stdPort = $proto === 'https' ? 443 : 80;

        $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 detectProtocol() {
        if ( ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] == 'on' ) ||
            ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) &&
            $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ) ) {
            return 'https';
        } else {
            return 'http';
        }
    }

    public function getProtocol() {
        if ( $this->protocol === null ) {
            $this->protocol = self::detectProtocol();
        }
        return $this->protocol;
    }

    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 {
            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 getFloat( $name, $default = 0 ) {
        return floatval( $this->getVal( $name, $default ) );
    }

    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 getRawQueryString() {
        return $_SERVER['QUERY_STRING'];
    }

    public function getRawPostString() {
        if ( !$this->wasPosted() ) {
            return '';
        }
        return $this->getRawInput();
    }

    public function getRawInput() {
        static $input = false;
        if ( $input === false ) {
            $input = file_get_contents( 'php://input' );
        }
        return $input;
    }

    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] == '/' ) {
            // More than one slash will look like it is protocol relative
            return preg_replace( '!^/+!', '/', $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 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;
        }

        $apacheHeaders = function_exists( 'apache_request_headers' ) ? apache_request_headers() : false;
        if ( $apacheHeaders ) {
            foreach ( $apacheHeaders 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 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). However, prefer private
            # IP addresses over proxy servers controlled by this site (more sensible).
            foreach ( $ipchain as $i => $curIP ) {
                // ignore 'unknown' value from Squid when 'forwarded_for off' and try next
                if ( $curIP === 'unknown' ) {
                    continue;
                }
                $curIP = IP::sanitizeIP( IP::canonicalize( $curIP ) );
                if ( wfIsTrustedProxy( $curIP ) && isset( $ipchain[$i + 1] ) ) {
                    if ( wfIsConfiguredProxy( $curIP ) || // bug 48919; treat IP as sane
                        IP::isPublic( $ipchain[$i + 1] ) ||
                        $wgUsePrivateIPs
                    ) {
                        $nextIP = IP::canonicalize( $ipchain[$i + 1] );
                        if ( !$nextIP && wfIsConfiguredProxy( $ip ) ) {
                            // We have not yet made it past CDN/proxy servers of this site,
                            // so either they are misconfigured or there is some IP spoofing.
                            throw new MWException( "Invalid IP given in XFF '$forwardedFor'." );
                        }
                        $ip = $nextIP;
                        continue;
                    }
                }
                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, $protocol = 'http' ) {
        if ( is_array( $data ) ) {
            $this->data = $data;
        } else {
            throw new MWException( "FauxRequest() got bogus data" );
        }
        $this->wasPosted = $wasPosted;
        if ( $session ) {
            $this->session = $session;
        }
        $this->protocol = $protocol;
    }

    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 getProtocol() {
        return $this->protocol;
    }

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

    public function setHeader( $name, $val ) {
        $name = strtoupper( $name );
        $this->headers[$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 getRawQueryString() {
        return '';
    }

    public function getRawPostString() {
        return '';
    }

    public function getRawInput() {
        return '';
    }

    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();
    }

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