includes/WebRequest.php

   1 <?php
   2 /**
   3  * Deal with importing all those nasssty globals and things
   4  *
   5  * Copyright © 2003 Brion Vibber <brion@pobox.com>
   6  * http://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * The WebRequest class encapsulates getting at data passed in the
  28  * URL or via a POSTed form, handling remove of "magic quotes" slashes,
  29  * stripping illegal input characters and normalizing Unicode sequences.
  30  *
  31  * Usually this is used via a global singleton, $wgRequest. You should
  32  * not create a second WebRequest object; make a FauxRequest object if
  33  * you want to pass arbitrary data to some function in place of the web
  34  * input.
  35  *
  36  * @ingroup HTTP
  37  */
  38 class WebRequest {
  39         protected $data, $headers = array();
  40
  41         /**
  42          * Lazy-init response object
  43          * @var WebResponse
  44          */
  45         private $response;
  46
  47         /**
  48          * Cached client IP address
  49          * @var String
  50          */
  51         private $ip;
  52
  53         public function __construct() {
  54                 /// @todo FIXME: This preemptive de-quoting can interfere with other web libraries
  55                 ///        and increases our memory footprint. It would be cleaner to do on
  56                 ///        demand; but currently we have no wrapper for $_SERVER etc.
  57                 $this->checkMagicQuotes();
  58
  59                 // POST overrides GET data
  60                 // We don't use $_REQUEST here to avoid interference from cookies...
  61                 $this->data = $_POST + $_GET;
  62         }
  63
  64         /**
  65          * Extract relevant query arguments from the http request uri's path
  66          * to be merged with the normal php provided query arguments.
  67          * Tries to use the REQUEST_URI data if available and parses it
  68          * according to the wiki's configuration looking for any known pattern.
  69          *
  70          * If the REQUEST_URI is not provided we'll fall back on the PATH_INFO
  71          * provided by the server if any and use that to set a 'title' parameter.
  72          *
  73          * @param $want string: If this is not 'all', then the function
  74          * will return an empty array if it determines that the URL is
  75          * inside a rewrite path.
  76          *
  77          * @return Array: Any query arguments found in path matches.
  78          */
  79         public static function getPathInfo( $want = 'all' ) {
  80                 global $wgUsePathInfo;
  81                 // PATH_INFO is mangled due to http://bugs.php.net/bug.php?id=31892
  82                 // And also by Apache 2.x, double slashes are converted to single slashes.
  83                 // So we will use REQUEST_URI if possible.
  84                 $matches = array();
  85                 if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
  86                         // Slurp out the path portion to examine...
  87                         $url = $_SERVER['REQUEST_URI'];
  88                         if ( !preg_match( '!^https?://!', $url ) ) {
  89                                 $url = 'http://unused' . $url;
  90                         }
  91                         wfSuppressWarnings();
  92                         $a = parse_url( $url );
  93                         wfRestoreWarnings();
  94                         if( $a ) {
  95                                 $path = isset( $a['path'] ) ? $a['path'] : '';
  96
  97                                 global $wgScript;
  98                                 if( $path == $wgScript && $want !== 'all' ) {
  99                                         // Script inside a rewrite path?
 100                                         // Abort to keep from breaking...
 101                                         return $matches;
 102                                 }
 103
 104                                 $router = new PathRouter;
 105
 106                                 // Raw PATH_INFO style
 107                                 $router->add( "$wgScript/$1" );
 108
 109                                 if( isset( $_SERVER['SCRIPT_NAME'] )
 110                                         && preg_match( '/\.php5?/', $_SERVER['SCRIPT_NAME'] ) )
 111                                 {
 112                                         # Check for SCRIPT_NAME, we handle index.php explicitly
 113                                         # But we do have some other .php files such as img_auth.php
 114                                         # Don't let root article paths clober the parsing for them
 115                                         $router->add( $_SERVER['SCRIPT_NAME'] . "/$1" );
 116                                 }
 117
 118                                 global $wgArticlePath;
 119                                 if( $wgArticlePath ) {
 120                                         $router->add( $wgArticlePath );
 121                                 }
 122
 123                                 global $wgActionPaths;
 124                                 if( $wgActionPaths ) {
 125                                         $router->add( $wgActionPaths, array( 'action' => '$key' ) );
 126                                 }
 127
 128                                 global $wgVariantArticlePath, $wgContLang;
 129                                 if( $wgVariantArticlePath ) {
 130                                         $router->add( $wgVariantArticlePath,
 131                                                 array( 'variant' => '$2'),
 132                                                 array( '$2' => $wgContLang->getVariants() )
 133                                         );
 134                                 }
 135
 136                                 wfRunHooks( 'WebRequestPathInfoRouter', array( $router ) );
 137
 138                                 $matches = $router->parse( $path );
 139                         }
 140                 } elseif ( $wgUsePathInfo ) {
 141                         if ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
 142                                 // Mangled PATH_INFO
 143                                 // http://bugs.php.net/bug.php?id=31892
 144                                 // Also reported when ini_get('cgi.fix_pathinfo')==false
 145                                 $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );
 146
 147                         } elseif ( isset( $_SERVER['PATH_INFO'] ) && ($_SERVER['PATH_INFO'] != '') ) {
 148                                 // Regular old PATH_INFO yay
 149                                 $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
 150                         }
 151                 }
 152
 153                 return $matches;
 154         }
 155
 156         /**
 157          * Work out an appropriate URL prefix containing scheme and host, based on
 158          * information detected from $_SERVER
 159          *
 160          * @return string
 161          */
 162         public static function detectServer() {
 163                 list( $proto, $stdPort ) = self::detectProtocolAndStdPort();
 164
 165                 $varNames = array( 'HTTP_HOST', 'SERVER_NAME', 'HOSTNAME', 'SERVER_ADDR' );
 166                 $host = 'localhost';
 167                 $port = $stdPort;
 168                 foreach ( $varNames as $varName ) {
 169                         if ( !isset( $_SERVER[$varName] ) ) {
 170                                 continue;
 171                         }
 172                         $parts = IP::splitHostAndPort( $_SERVER[$varName] );
 173                         if ( !$parts ) {
 174                                 // Invalid, do not use
 175                                 continue;
 176                         }
 177                         $host = $parts[0];
 178                         if ( $parts[1] === false ) {
 179                                 if ( isset( $_SERVER['SERVER_PORT'] ) ) {
 180                                         $port = $_SERVER['SERVER_PORT'];
 181                                 } // else leave it as $stdPort
 182                         } else {
 183                                 $port = $parts[1];
 184                         }
 185                         break;
 186                 }
 187
 188                 return $proto . '://' . IP::combineHostAndPort( $host, $port, $stdPort );
 189         }
 190
 191         /**
 192          * @return array
 193          */
 194         public static function detectProtocolAndStdPort() {
 195                 if ( ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] == 'on' ) ||
 196                         ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) &&
 197                         $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https' ) ) {
 198                         $arr = array( 'https', 443 );
 199                 } else {
 200                         $arr = array( 'http', 80 );
 201                 }
 202                 return $arr;
 203         }
 204
 205         /**
 206          * @return string
 207          */
 208         public static function detectProtocol() {
 209                 list( $proto, $stdPort ) = self::detectProtocolAndStdPort();
 210                 return $proto;
 211         }
 212
 213         /**
 214          * Check for title, action, and/or variant data in the URL
 215          * and interpolate it into the GET variables.
 216          * This should only be run after $wgContLang is available,
 217          * as we may need the list of language variants to determine
 218          * available variant URLs.
 219          */
 220         public function interpolateTitle() {
 221                 // bug 16019: title interpolation on API queries is useless and sometimes harmful
 222                 if ( defined( 'MW_API' ) ) {
 223                         return;
 224                 }
 225
 226                 $matches = self::getPathInfo( 'title' );
 227                 foreach( $matches as $key => $val) {
 228                         $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
 229                 }
 230         }
 231
 232         /**
 233          * URL rewriting function; tries to extract page title and,
 234          * optionally, one other fixed parameter value from a URL path.
 235          *
 236          * @param $path string: the URL path given from the client
 237          * @param $bases array: one or more URLs, optionally with $1 at the end
 238          * @param $key string: if provided, the matching key in $bases will be
 239          *             passed on as the value of this URL parameter
 240          * @return array of URL variables to interpolate; empty if no match
 241          */
 242         static function extractTitle( $path, $bases, $key = false ) {
 243                 foreach( (array)$bases as $keyValue => $base ) {
 244                         // Find the part after $wgArticlePath
 245                         $base = str_replace( '$1', '', $base );
 246                         $baseLen = strlen( $base );
 247                         if( substr( $path, 0, $baseLen ) == $base ) {
 248                                 $raw = substr( $path, $baseLen );
 249                                 if( $raw !== '' ) {
 250                                         $matches = array( 'title' => rawurldecode( $raw ) );
 251                                         if( $key ) {
 252                                                 $matches[$key] = $keyValue;
 253                                         }
 254                                         return $matches;
 255                                 }
 256                         }
 257                 }
 258                 return array();
 259         }
 260
 261         /**
 262          * Recursively strips slashes from the given array;
 263          * used for undoing the evil that is magic_quotes_gpc.
 264          *
 265          * @param $arr array: will be modified
 266          * @param $topLevel bool Specifies if the array passed is from the top
 267          * level of the source. In PHP5 magic_quotes only escapes the first level
 268          * of keys that belong to an array.
 269          * @return array the original array
 270          * @see http://www.php.net/manual/en/function.get-magic-quotes-gpc.php#49612
 271          */
 272         private function &fix_magic_quotes( &$arr, $topLevel = true ) {
 273                 $clean = array();
 274                 foreach( $arr as $key => $val ) {
 275                         if( is_array( $val ) ) {
 276                                 $cleanKey = $topLevel ? stripslashes( $key ) : $key;
 277                                 $clean[$cleanKey] = $this->fix_magic_quotes( $arr[$key], false );
 278                         } else {
 279                                 $cleanKey = stripslashes( $key );
 280                                 $clean[$cleanKey] = stripslashes( $val );
 281                         }
 282                 }
 283                 $arr = $clean;
 284                 return $arr;
 285         }
 286
 287         /**
 288          * If magic_quotes_gpc option is on, run the global arrays
 289          * through fix_magic_quotes to strip out the stupid slashes.
 290          * WARNING: This should only be done once! Running a second
 291          * time could damage the values.
 292          */
 293         private function checkMagicQuotes() {
 294                 $mustFixQuotes = function_exists( 'get_magic_quotes_gpc' )
 295                         && get_magic_quotes_gpc();
 296                 if( $mustFixQuotes ) {
 297                         $this->fix_magic_quotes( $_COOKIE );
 298                         $this->fix_magic_quotes( $_ENV );
 299                         $this->fix_magic_quotes( $_GET );
 300                         $this->fix_magic_quotes( $_POST );
 301                         $this->fix_magic_quotes( $_REQUEST );
 302                         $this->fix_magic_quotes( $_SERVER );
 303                 }
 304         }
 305
 306         /**
 307          * Recursively normalizes UTF-8 strings in the given array.
 308          *
 309          * @param $data string|array
 310          * @return array|string cleaned-up version of the given
 311          * @private
 312          */
 313         function normalizeUnicode( $data ) {
 314                 if( is_array( $data ) ) {
 315                         foreach( $data as $key => $val ) {
 316                                 $data[$key] = $this->normalizeUnicode( $val );
 317                         }
 318                 } else {
 319                         global $wgContLang;
 320                         $data = isset( $wgContLang ) ? $wgContLang->normalize( $data ) : UtfNormal::cleanUp( $data );
 321                 }
 322                 return $data;
 323         }
 324
 325         /**
 326          * Fetch a value from the given array or return $default if it's not set.
 327          *
 328          * @param $arr Array
 329          * @param $name String
 330          * @param $default Mixed
 331          * @return mixed
 332          */
 333         private function getGPCVal( $arr, $name, $default ) {
 334                 # PHP is so nice to not touch input data, except sometimes:
 335                 # http://us2.php.net/variables.external#language.variables.external.dot-in-names
 336                 # Work around PHP *feature* to avoid *bugs* elsewhere.
 337                 $name = strtr( $name, '.', '_' );
 338                 if( isset( $arr[$name] ) ) {
 339                         global $wgContLang;
 340                         $data = $arr[$name];
 341                         if( isset( $_GET[$name] ) && !is_array( $data ) ) {
 342                                 # Check for alternate/legacy character encoding.
 343                                 if( isset( $wgContLang ) ) {
 344                                         $data = $wgContLang->checkTitleEncoding( $data );
 345                                 }
 346                         }
 347                         $data = $this->normalizeUnicode( $data );
 348                         return $data;
 349                 } else {
 350                         taint( $default );
 351                         return $default;
 352                 }
 353         }
 354
 355         /**
 356          * Fetch a scalar from the input or return $default if it's not set.
 357          * Returns a string. Arrays are discarded. Useful for
 358          * non-freeform text inputs (e.g. predefined internal text keys
 359          * selected by a drop-down menu). For freeform input, see getText().
 360          *
 361          * @param $name String
 362          * @param $default String: optional default (or NULL)
 363          * @return String
 364          */
 365         public function getVal( $name, $default = null ) {
 366                 $val = $this->getGPCVal( $this->data, $name, $default );
 367                 if( is_array( $val ) ) {
 368                         $val = $default;
 369                 }
 370                 if( is_null( $val ) ) {
 371                         return $val;
 372                 } else {
 373                         return (string)$val;
 374                 }
 375         }
 376
 377         /**
 378          * Set an arbitrary value into our get/post data.
 379          *
 380          * @param $key String: key name to use
 381          * @param $value Mixed: value to set
 382          * @return Mixed: old value if one was present, null otherwise
 383          */
 384         public function setVal( $key, $value ) {
 385                 $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
 386                 $this->data[$key] = $value;
 387                 return $ret;
 388         }
 389
 390         /**
 391          * Unset an arbitrary value from our get/post data.
 392          *
 393          * @param $key String: key name to use
 394          * @return Mixed: old value if one was present, null otherwise
 395          */
 396         public function unsetVal( $key ) {
 397                 if ( !isset( $this->data[$key] ) ) {
 398                         $ret = null;
 399                 } else {
 400                         $ret = $this->data[$key];
 401                         unset( $this->data[$key] );
 402                 }
 403                 return $ret;
 404         }
 405
 406         /**
 407          * Fetch an array from the input or return $default if it's not set.
 408          * If source was scalar, will return an array with a single element.
 409          * If no source and no default, returns NULL.
 410          *
 411          * @param $name String
 412          * @param $default Array: optional default (or NULL)
 413          * @return Array
 414          */
 415         public function getArray( $name, $default = null ) {
 416                 $val = $this->getGPCVal( $this->data, $name, $default );
 417                 if( is_null( $val ) ) {
 418                         return null;
 419                 } else {
 420                         return (array)$val;
 421                 }
 422         }
 423
 424         /**
 425          * Fetch an array of integers, or return $default if it's not set.
 426          * If source was scalar, will return an array with a single element.
 427          * If no source and no default, returns NULL.
 428          * If an array is returned, contents are guaranteed to be integers.
 429          *
 430          * @param $name String
 431          * @param $default Array: option default (or NULL)
 432          * @return Array of ints
 433          */
 434         public function getIntArray( $name, $default = null ) {
 435                 $val = $this->getArray( $name, $default );
 436                 if( is_array( $val ) ) {
 437                         $val = array_map( 'intval', $val );
 438                 }
 439                 return $val;
 440         }
 441
 442         /**
 443          * Fetch an integer value from the input or return $default if not set.
 444          * Guaranteed to return an integer; non-numeric input will typically
 445          * return 0.
 446          *
 447          * @param $name String
 448          * @param $default Integer
 449          * @return Integer
 450          */
 451         public function getInt( $name, $default = 0 ) {
 452                 return intval( $this->getVal( $name, $default ) );
 453         }
 454
 455         /**
 456          * Fetch an integer value from the input or return null if empty.
 457          * Guaranteed to return an integer or null; non-numeric input will
 458          * typically return null.
 459          *
 460          * @param $name String
 461          * @return Integer
 462          */
 463         public function getIntOrNull( $name ) {
 464                 $val = $this->getVal( $name );
 465                 return is_numeric( $val )
 466                         ? intval( $val )
 467                         : null;
 468         }
 469
 470         /**
 471          * Fetch a boolean value from the input or return $default if not set.
 472          * Guaranteed to return true or false, with normal PHP semantics for
 473          * boolean interpretation of strings.
 474          *
 475          * @param $name String
 476          * @param $default Boolean
 477          * @return Boolean
 478          */
 479         public function getBool( $name, $default = false ) {
 480                 return (bool)$this->getVal( $name, $default );
 481         }
 482
 483         /**
 484          * Fetch a boolean value from the input or return $default if not set.
 485          * Unlike getBool, the string "false" will result in boolean false, which is
 486          * useful when interpreting information sent from JavaScript.
 487          *
 488          * @param $name String
 489          * @param $default Boolean
 490          * @return Boolean
 491          */
 492         public function getFuzzyBool( $name, $default = false ) {
 493                 return $this->getBool( $name, $default ) && strcasecmp( $this->getVal( $name ), 'false' ) !== 0;
 494         }
 495
 496         /**
 497          * Return true if the named value is set in the input, whatever that
 498          * value is (even "0"). Return false if the named value is not set.
 499          * Example use is checking for the presence of check boxes in forms.
 500          *
 501          * @param $name String
 502          * @return Boolean
 503          */
 504         public function getCheck( $name ) {
 505                 # Checkboxes and buttons are only present when clicked
 506                 # Presence connotes truth, abscense false
 507                 return $this->getVal( $name, null ) !== null;
 508         }
 509
 510         /**
 511          * Fetch a text string from the given array or return $default if it's not
 512          * set. Carriage returns are stripped from the text, and with some language
 513          * modules there is an input transliteration applied. This should generally
 514          * be used for form "<textarea>" and "<input>" fields. Used for
 515          * user-supplied freeform text input (for which input transformations may
 516          * be required - e.g.  Esperanto x-coding).
 517          *
 518          * @param $name String
 519          * @param $default String: optional
 520          * @return String
 521          */
 522         public function getText( $name, $default = '' ) {
 523                 global $wgContLang;
 524                 $val = $this->getVal( $name, $default );
 525                 return str_replace( "\r\n", "\n",
 526                         $wgContLang->recodeInput( $val ) );
 527         }
 528
 529         /**
 530          * Extracts the given named values into an array.
 531          * If no arguments are given, returns all input values.
 532          * No transformation is performed on the values.
 533          *
 534          * @return array
 535          */
 536         public function getValues() {
 537                 $names = func_get_args();
 538                 if ( count( $names ) == 0 ) {
 539                         $names = array_keys( $this->data );
 540                 }
 541
 542                 $retVal = array();
 543                 foreach ( $names as $name ) {
 544                         $value = $this->getGPCVal( $this->data, $name, null );
 545                         if ( !is_null( $value ) ) {
 546                                 $retVal[$name] = $value;
 547                         }
 548                 }
 549                 return $retVal;
 550         }
 551
 552         /**
 553          * Returns the names of all input values excluding those in $exclude.
 554          *
 555          * @param $exclude Array
 556          * @return array
 557          */
 558         public function getValueNames( $exclude = array() ) {
 559                 return array_diff( array_keys( $this->getValues() ), $exclude );
 560         }
 561
 562         /**
 563          * Get the values passed in the query string.
 564          * No transformation is performed on the values.
 565          *
 566          * @return Array
 567          */
 568          public function getQueryValues() {
 569                 return $_GET;
 570          }
 571
 572         /**
 573          * Get the HTTP method used for this request.
 574          *
 575          * @return String
 576          */
 577         public function getMethod() {
 578                 return isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : 'GET';
 579         }
 580
 581         /**
 582          * Returns true if the present request was reached by a POST operation,
 583          * false otherwise (GET, HEAD, or command-line).
 584          *
 585          * Note that values retrieved by the object may come from the
 586          * GET URL etc even on a POST request.
 587          *
 588          * @return Boolean
 589          */
 590         public function wasPosted() {
 591                 return $this->getMethod() == 'POST';
 592         }
 593
 594         /**
 595          * Returns true if there is a session cookie set.
 596          * This does not necessarily mean that the user is logged in!
 597          *
 598          * If you want to check for an open session, use session_id()
 599          * instead; that will also tell you if the session was opened
 600          * during the current request (in which case the cookie will
 601          * be sent back to the client at the end of the script run).
 602          *
 603          * @return Boolean
 604          */
 605         public function checkSessionCookie() {
 606                 return isset( $_COOKIE[ session_name() ] );
 607         }
 608
 609         /**
 610          * Get a cookie from the $_COOKIE jar
 611          *
 612          * @param $key String: the name of the cookie
 613          * @param $prefix String: a prefix to use for the cookie name, if not $wgCookiePrefix
 614          * @param $default Mixed: what to return if the value isn't found
 615          * @return Mixed: cookie value or $default if the cookie not set
 616          */
 617         public function getCookie( $key, $prefix = null, $default = null ) {
 618                 if( $prefix === null ) {
 619                         global $wgCookiePrefix;
 620                         $prefix = $wgCookiePrefix;
 621                 }
 622                 return $this->getGPCVal( $_COOKIE, $prefix . $key , $default );
 623         }
 624
 625         /**
 626          * Return the path and query string portion of the request URI.
 627          * This will be suitable for use as a relative link in HTML output.
 628          *
 629          * @throws MWException
 630          * @return String
 631          */
 632         public function getRequestURL() {
 633                 if( isset( $_SERVER['REQUEST_URI'] ) && strlen( $_SERVER['REQUEST_URI'] ) ) {
 634                         $base = $_SERVER['REQUEST_URI'];
 635                 } elseif ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) && strlen( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
 636                         // Probably IIS; doesn't set REQUEST_URI
 637                         $base = $_SERVER['HTTP_X_ORIGINAL_URL'];
 638                 } elseif( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 639                         $base = $_SERVER['SCRIPT_NAME'];
 640                         if( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 641                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 642                         }
 643                 } else {
 644                         // This shouldn't happen!
 645                         throw new MWException( "Web server doesn't provide either " .
 646                                 "REQUEST_URI, HTTP_X_ORIGINAL_URL or SCRIPT_NAME. Report details " .
 647                                 "of your web server configuration to http://bugzilla.wikimedia.org/" );
 648                 }
 649                 // User-agents should not send a fragment with the URI, but
 650                 // if they do, and the web server passes it on to us, we
 651                 // need to strip it or we get false-positive redirect loops
 652                 // or weird output URLs
 653                 $hash = strpos( $base, '#' );
 654                 if( $hash !== false ) {
 655                         $base = substr( $base, 0, $hash );
 656                 }
 657                 if( $base[0] == '/' ) {
 658                         return $base;
 659                 } else {
 660                         // We may get paths with a host prepended; strip it.
 661                         return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
 662                 }
 663         }
 664
 665         /**
 666          * Return the request URI with the canonical service and hostname, path,
 667          * and query string. This will be suitable for use as an absolute link
 668          * in HTML or other output.
 669          *
 670          * If $wgServer is protocol-relative, this will return a fully
 671          * qualified URL with the protocol that was used for this request.
 672          *
 673          * @return String
 674          */
 675         public function getFullRequestURL() {
 676                 return wfExpandUrl( $this->getRequestURL(), PROTO_CURRENT );
 677         }
 678
 679         /**
 680          * Take an arbitrary query and rewrite the present URL to include it
 681          * @param $query String: query string fragment; do not include initial '?'
 682          *
 683          * @return String
 684          */
 685         public function appendQuery( $query ) {
 686                 return $this->appendQueryArray( wfCgiToArray( $query ) );
 687         }
 688
 689         /**
 690          * HTML-safe version of appendQuery().
 691          * @deprecated: Deprecated in 1.20, warnings in 1.21, remove in 1.22.
 692          *
 693          * @param $query String: query string fragment; do not include initial '?'
 694          * @return String
 695          */
 696         public function escapeAppendQuery( $query ) {
 697                 return htmlspecialchars( $this->appendQuery( $query ) );
 698         }
 699
 700         /**
 701          * @param $key
 702          * @param $value
 703          * @param $onlyquery bool
 704          * @return String
 705          */
 706         public function appendQueryValue( $key, $value, $onlyquery = false ) {
 707                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 708         }
 709
 710         /**
 711          * Appends or replaces value of query variables.
 712          *
 713          * @param $array Array of values to replace/add to query
 714          * @param $onlyquery Bool: whether to only return the query string and not
 715          *                   the complete URL
 716          * @return String
 717          */
 718         public function appendQueryArray( $array, $onlyquery = false ) {
 719                 global $wgTitle;
 720                 $newquery = $this->getQueryValues();
 721                 unset( $newquery['title'] );
 722                 $newquery = array_merge( $newquery, $array );
 723                 $query = wfArrayToCGI( $newquery );
 724                 return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
 725         }
 726
 727         /**
 728          * Check for limit and offset parameters on the input, and return sensible
 729          * defaults if not given. The limit must be positive and is capped at 5000.
 730          * Offset must be positive but is not capped.
 731          *
 732          * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
 733          * @param $optionname String: to specify an option other than rclimit to pull from.
 734          * @return array first element is limit, second is offset
 735          */
 736         public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 737                 global $wgUser;
 738
 739                 $limit = $this->getInt( 'limit', 0 );
 740                 if( $limit < 0 ) {
 741                         $limit = 0;
 742                 }
 743                 if( ( $limit == 0 ) && ( $optionname != '' ) ) {
 744                         $limit = (int)$wgUser->getOption( $optionname );
 745                 }
 746                 if( $limit <= 0 ) {
 747                         $limit = $deflimit;
 748                 }
 749                 if( $limit > 5000 ) {
 750                         $limit = 5000; # We have *some* limits...
 751                 }
 752
 753                 $offset = $this->getInt( 'offset', 0 );
 754                 if( $offset < 0 ) {
 755                         $offset = 0;
 756                 }
 757
 758                 return array( $limit, $offset );
 759         }
 760
 761         /**
 762          * Return the path to the temporary file where PHP has stored the upload.
 763          *
 764          * @param $key String:
 765          * @return string or NULL if no such file.
 766          */
 767         public function getFileTempname( $key ) {
 768                 $file = new WebRequestUpload( $this, $key );
 769                 return $file->getTempName();
 770         }
 771
 772         /**
 773          * Return the size of the upload, or 0.
 774          *
 775          * @deprecated since 1.17
 776          * @param $key String:
 777          * @return integer
 778          */
 779         public function getFileSize( $key ) {
 780                 wfDeprecated( __METHOD__, '1.17' );
 781                 $file = new WebRequestUpload( $this, $key );
 782                 return $file->getSize();
 783         }
 784
 785         /**
 786          * Return the upload error or 0
 787          *
 788          * @param $key String:
 789          * @return integer
 790          */
 791         public function getUploadError( $key ) {
 792                 $file = new WebRequestUpload( $this, $key );
 793                 return $file->getError();
 794         }
 795
 796         /**
 797          * Return the original filename of the uploaded file, as reported by
 798          * the submitting user agent. HTML-style character entities are
 799          * interpreted and normalized to Unicode normalization form C, in part
 800          * to deal with weird input from Safari with non-ASCII filenames.
 801          *
 802          * Other than this the name is not verified for being a safe filename.
 803          *
 804          * @param $key String:
 805          * @return string or NULL if no such file.
 806          */
 807         public function getFileName( $key ) {
 808                 $file = new WebRequestUpload( $this, $key );
 809                 return $file->getName();
 810         }
 811
 812         /**
 813          * Return a WebRequestUpload object corresponding to the key
 814          *
 815          * @param $key string
 816          * @return WebRequestUpload
 817          */
 818         public function getUpload( $key ) {
 819                 return new WebRequestUpload( $this, $key );
 820         }
 821
 822         /**
 823          * Return a handle to WebResponse style object, for setting cookies,
 824          * headers and other stuff, for Request being worked on.
 825          *
 826          * @return WebResponse
 827          */
 828         public function response() {
 829                 /* Lazy initialization of response object for this request */
 830                 if ( !is_object( $this->response ) ) {
 831                         $class = ( $this instanceof FauxRequest ) ? 'FauxResponse' : 'WebResponse';
 832                         $this->response = new $class();
 833                 }
 834                 return $this->response;
 835         }
 836
 837         /**
 838          * Initialise the header list
 839          */
 840         private function initHeaders() {
 841                 if ( count( $this->headers ) ) {
 842                         return;
 843                 }
 844
 845                 if ( function_exists( 'apache_request_headers' ) ) {
 846                         foreach ( apache_request_headers() as $tempName => $tempValue ) {
 847                                 $this->headers[ strtoupper( $tempName ) ] = $tempValue;
 848                         }
 849                 } else {
 850                         foreach ( $_SERVER as $name => $value ) {
 851                                 if ( substr( $name, 0, 5 ) === 'HTTP_' ) {
 852                                         $name = str_replace( '_', '-',  substr( $name, 5 ) );
 853                                         $this->headers[$name] = $value;
 854                                 } elseif ( $name === 'CONTENT_LENGTH' ) {
 855                                         $this->headers['CONTENT-LENGTH'] = $value;
 856                                 }
 857                         }
 858                 }
 859         }
 860
 861         /**
 862          * Get an array containing all request headers
 863          *
 864          * @return Array mapping header name to its value
 865          */
 866         public function getAllHeaders() {
 867                 $this->initHeaders();
 868                 return $this->headers;
 869         }
 870
 871         /**
 872          * Get a request header, or false if it isn't set
 873          * @param $name String: case-insensitive header name
 874          *
 875          * @return string|bool False on failure
 876          */
 877         public function getHeader( $name ) {
 878                 $this->initHeaders();
 879                 $name = strtoupper( $name );
 880                 if ( isset( $this->headers[$name] ) ) {
 881                         return $this->headers[$name];
 882                 } else {
 883                         return false;
 884                 }
 885         }
 886
 887         /**
 888          * Get data from $_SESSION
 889          *
 890          * @param $key String: name of key in $_SESSION
 891          * @return Mixed
 892          */
 893         public function getSessionData( $key ) {
 894                 if( !isset( $_SESSION[$key] ) ) {
 895                         return null;
 896                 }
 897                 return $_SESSION[$key];
 898         }
 899
 900         /**
 901          * Set session data
 902          *
 903          * @param $key String: name of key in $_SESSION
 904          * @param $data Mixed
 905          */
 906         public function setSessionData( $key, $data ) {
 907                 $_SESSION[$key] = $data;
 908         }
 909
 910         /**
 911          * Check if Internet Explorer will detect an incorrect cache extension in
 912          * PATH_INFO or QUERY_STRING. If the request can't be allowed, show an error
 913          * message or redirect to a safer URL. Returns true if the URL is OK, and
 914          * false if an error message has been shown and the request should be aborted.
 915          *
 916          * @param $extWhitelist array
 917          * @throws HttpError
 918          * @return bool
 919          */
 920         public function checkUrlExtension( $extWhitelist = array() ) {
 921                 global $wgScriptExtension;
 922                 $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
 923                 if ( IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist ) ) {
 924                         if ( !$this->wasPosted() ) {
 925                                 $newUrl = IEUrlExtension::fixUrlForIE6(
 926                                         $this->getFullRequestURL(), $extWhitelist );
 927                                 if ( $newUrl !== false ) {
 928                                         $this->doSecurityRedirect( $newUrl );
 929                                         return false;
 930                                 }
 931                         }
 932                         throw new HttpError( 403,
 933                                 'Invalid file extension found in the path info or query string.' );
 934                 }
 935                 return true;
 936         }
 937
 938         /**
 939          * Attempt to redirect to a URL with a QUERY_STRING that's not dangerous in
 940          * IE 6. Returns true if it was successful, false otherwise.
 941          *
 942          * @param $url string
 943          * @return bool
 944          */
 945         protected function doSecurityRedirect( $url ) {
 946                 header( 'Location: ' . $url );
 947                 header( 'Content-Type: text/html' );
 948                 $encUrl = htmlspecialchars( $url );
 949                 echo <<<HTML
 950 <html>
 951 <head>
 952 <title>Security redirect</title>
 953 </head>
 954 <body>
 955 <h1>Security redirect</h1>
 956 <p>
 957 We can't serve non-HTML content from the URL you have requested, because
 958 Internet Explorer would interpret it as an incorrect and potentially dangerous
 959 content type.</p>
 960 <p>Instead, please use <a href="$encUrl">this URL</a>, which is the same as the URL you have requested, except that
 961 "&amp;*" is appended. This prevents Internet Explorer from seeing a bogus file
 962 extension.
 963 </p>
 964 </body>
 965 </html>
 966 HTML;
 967                 echo "\n";
 968                 return true;
 969         }
 970
 971         /**
 972          * Returns true if the PATH_INFO ends with an extension other than a script
 973          * extension. This could confuse IE for scripts that send arbitrary data which
 974          * is not HTML but may be detected as such.
 975          *
 976          * Various past attempts to use the URL to make this check have generally
 977          * run up against the fact that CGI does not provide a standard method to
 978          * determine the URL. PATH_INFO may be mangled (e.g. if cgi.fix_pathinfo=0),
 979          * but only by prefixing it with the script name and maybe some other stuff,
 980          * the extension is not mangled. So this should be a reasonably portable
 981          * way to perform this security check.
 982          *
 983          * Also checks for anything that looks like a file extension at the end of
 984          * QUERY_STRING, since IE 6 and earlier will use this to get the file type
 985          * if there was no dot before the question mark (bug 28235).
 986          *
 987          * @deprecated Use checkUrlExtension().
 988          *
 989          * @param $extWhitelist array
 990          *
 991          * @return bool
 992          */
 993         public function isPathInfoBad( $extWhitelist = array() ) {
 994                 wfDeprecated( __METHOD__, '1.17' );
 995                 global $wgScriptExtension;
 996                 $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
 997                 return IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist );
 998         }
 999
1000         /**
1001          * Parse the Accept-Language header sent by the client into an array
1002          * @return array array( languageCode => q-value ) sorted by q-value in descending order then
1003          *                                                appearing time in the header in ascending order.
1004          * May contain the "language" '*', which applies to languages other than those explicitly listed.
1005          * This is aligned with rfc2616 section 14.4
1006          * Preference for earlier languages appears in rfc3282 as an extension to HTTP/1.1.
1007          */
1008         public function getAcceptLang() {
1009                 // Modified version of code found at http://www.thefutureoftheweb.com/blog/use-accept-language-header
1010                 $acceptLang = $this->getHeader( 'Accept-Language' );
1011                 if ( !$acceptLang ) {
1012                         return array();
1013                 }
1014
1015                 // Return the language codes in lower case
1016                 $acceptLang = strtolower( $acceptLang );
1017
1018                 // Break up string into pieces (languages and q factors)
1019                 $lang_parse = null;
1020                 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})?)?)?/',
1021                         $acceptLang, $lang_parse );
1022
1023                 if ( !count( $lang_parse[1] ) ) {
1024                         return array();
1025                 }
1026
1027                 $langcodes = $lang_parse[1];
1028                 $qvalues = $lang_parse[4];
1029                 $indices = range( 0, count( $lang_parse[1] ) - 1 );
1030
1031                 // Set default q factor to 1
1032                 foreach ( $indices as $index ) {
1033                         if ( $qvalues[$index] === '' ) {
1034                                 $qvalues[$index] = 1;
1035                         } elseif ( $qvalues[$index] == 0 ) {
1036                                 unset( $langcodes[$index], $qvalues[$index], $indices[$index] );
1037                         }
1038                 }
1039
1040                 // Sort list. First by $qvalues, then by order. Reorder $langcodes the same way
1041                 array_multisort( $qvalues, SORT_DESC, SORT_NUMERIC, $indices, $langcodes );
1042
1043                 // Create a list like "en" => 0.8
1044                 $langs = array_combine( $langcodes, $qvalues );
1045
1046                 return $langs;
1047         }
1048
1049         /**
1050          * Fetch the raw IP from the request
1051          *
1052          * @since 1.19
1053          *
1054          * @throws MWException
1055          * @return String
1056          */
1057         protected function getRawIP() {
1058                 if ( !isset( $_SERVER['REMOTE_ADDR'] ) ) {
1059                         return null;
1060                 }
1061
1062                 if ( is_array( $_SERVER['REMOTE_ADDR'] ) || strpos( $_SERVER['REMOTE_ADDR'], ',' ) !== false ) {
1063                         throw new MWException( __METHOD__ . " : Could not determine the remote IP address due to multiple values." );
1064                 } else {
1065                         $ipchain = $_SERVER['REMOTE_ADDR'];
1066                 }
1067
1068                 return IP::canonicalize( $ipchain );
1069         }
1070
1071         /**
1072          * Work out the IP address based on various globals
1073          * For trusted proxies, use the XFF client IP (first of the chain)
1074          *
1075          * @since 1.19
1076          *
1077          * @throws MWException
1078          * @return string
1079          */
1080         public function getIP() {
1081                 global $wgUsePrivateIPs;
1082
1083                 # Return cached result
1084                 if ( $this->ip !== null ) {
1085                         return $this->ip;
1086                 }
1087
1088                 # collect the originating ips
1089                 $ip = $this->getRawIP();
1090
1091                 # Append XFF
1092                 $forwardedFor = $this->getHeader( 'X-Forwarded-For' );
1093                 if ( $forwardedFor !== false ) {
1094                         $ipchain = array_map( 'trim', explode( ',', $forwardedFor ) );
1095                         $ipchain = array_reverse( $ipchain );
1096                         if ( $ip ) {
1097                                 array_unshift( $ipchain, $ip );
1098                         }
1099
1100                         # Step through XFF list and find the last address in the list which is a trusted server
1101                         # Set $ip to the IP address given by that trusted server, unless the address is not sensible (e.g. private)
1102                         foreach ( $ipchain as $i => $curIP ) {
1103                                 $curIP = IP::canonicalize( $curIP );
1104                                 if ( wfIsTrustedProxy( $curIP ) ) {
1105                                         if ( isset( $ipchain[$i + 1] ) ) {
1106                                                 if ( $wgUsePrivateIPs || IP::isPublic( $ipchain[$i + 1 ] ) ) {
1107                                                         $ip = $ipchain[$i + 1];
1108                                                 }
1109                                         }
1110                                 } else {
1111                                         break;
1112                                 }
1113                         }
1114                 }
1115
1116                 # Allow extensions to improve our guess
1117                 wfRunHooks( 'GetIP', array( &$ip ) );
1118
1119                 if ( !$ip ) {
1120                         throw new MWException( "Unable to determine IP" );
1121                 }
1122
1123                 wfDebug( "IP: $ip\n" );
1124                 $this->ip = $ip;
1125                 return $ip;
1126         }
1127 }
1128
1129 /**
1130  * Object to access the $_FILES array
1131  */
1132 class WebRequestUpload {
1133         protected $request;
1134         protected $doesExist;
1135         protected $fileInfo;
1136
1137         /**
1138          * Constructor. Should only be called by WebRequest
1139          *
1140          * @param $request WebRequest The associated request
1141          * @param $key string Key in $_FILES array (name of form field)
1142          */
1143         public function __construct( $request, $key ) {
1144                 $this->request = $request;
1145                 $this->doesExist = isset( $_FILES[$key] );
1146                 if ( $this->doesExist ) {
1147                         $this->fileInfo = $_FILES[$key];
1148                 }
1149         }
1150
1151         /**
1152          * Return whether a file with this name was uploaded.
1153          *
1154          * @return bool
1155          */
1156         public function exists() {
1157                 return $this->doesExist;
1158         }
1159
1160         /**
1161          * Return the original filename of the uploaded file
1162          *
1163          * @return mixed Filename or null if non-existent
1164          */
1165         public function getName() {
1166                 if ( !$this->exists() ) {
1167                         return null;
1168                 }
1169
1170                 global $wgContLang;
1171                 $name = $this->fileInfo['name'];
1172
1173                 # Safari sends filenames in HTML-encoded Unicode form D...
1174                 # Horrid and evil! Let's try to make some kind of sense of it.
1175                 $name = Sanitizer::decodeCharReferences( $name );
1176                 $name = $wgContLang->normalize( $name );
1177                 wfDebug( __METHOD__ . ": {$this->fileInfo['name']} normalized to '$name'\n" );
1178                 return $name;
1179         }
1180
1181         /**
1182          * Return the file size of the uploaded file
1183          *
1184          * @return int File size or zero if non-existent
1185          */
1186         public function getSize() {
1187                 if ( !$this->exists() ) {
1188                         return 0;
1189                 }
1190
1191                 return $this->fileInfo['size'];
1192         }
1193
1194         /**
1195          * Return the path to the temporary file
1196          *
1197          * @return mixed Path or null if non-existent
1198          */
1199         public function getTempName() {
1200                 if ( !$this->exists() ) {
1201                         return null;
1202                 }
1203
1204                 return $this->fileInfo['tmp_name'];
1205         }
1206
1207         /**
1208          * Return the upload error. See link for explanation
1209          * http://www.php.net/manual/en/features.file-upload.errors.php
1210          *
1211          * @return int One of the UPLOAD_ constants, 0 if non-existent
1212          */
1213         public function getError() {
1214                 if ( !$this->exists() ) {
1215                         return 0; # UPLOAD_ERR_OK
1216                 }
1217
1218                 return $this->fileInfo['error'];
1219         }
1220
1221         /**
1222          * Returns whether this upload failed because of overflow of a maximum set
1223          * in php.ini
1224          *
1225          * @return bool
1226          */
1227         public function isIniSizeOverflow() {
1228                 if ( $this->getError() == UPLOAD_ERR_INI_SIZE ) {
1229                         # PHP indicated that upload_max_filesize is exceeded
1230                         return true;
1231                 }
1232
1233                 $contentLength = $this->request->getHeader( 'CONTENT_LENGTH' );
1234                 if ( $contentLength > wfShorthandToInteger( ini_get( 'post_max_size' ) ) ) {
1235                         # post_max_size is exceeded
1236                         return true;
1237                 }
1238
1239                 return false;
1240         }
1241 }
1242
1243 /**
1244  * WebRequest clone which takes values from a provided array.
1245  *
1246  * @ingroup HTTP
1247  */
1248 class FauxRequest extends WebRequest {
1249         private $wasPosted = false;
1250         private $session = array();
1251
1252         /**
1253          * @param $data Array of *non*-urlencoded key => value pairs, the
1254          *   fake GET/POST values
1255          * @param $wasPosted Bool: whether to treat the data as POST
1256          * @param $session Mixed: session array or null
1257          * @throws MWException
1258          */
1259         public function __construct( $data = array(), $wasPosted = false, $session = null ) {
1260                 if( is_array( $data ) ) {
1261                         $this->data = $data;
1262                 } else {
1263                         throw new MWException( "FauxRequest() got bogus data" );
1264                 }
1265                 $this->wasPosted = $wasPosted;
1266                 if( $session )
1267                         $this->session = $session;
1268         }
1269
1270         /**
1271          * @param $method string
1272          * @throws MWException
1273          */
1274         private function notImplemented( $method ) {
1275                 throw new MWException( "{$method}() not implemented" );
1276         }
1277
1278         /**
1279          * @param $name string
1280          * @param $default string
1281          * @return string
1282          */
1283         public function getText( $name, $default = '' ) {
1284                 # Override; don't recode since we're using internal data
1285                 return (string)$this->getVal( $name, $default );
1286         }
1287
1288         /**
1289          * @return Array
1290          */
1291         public function getValues() {
1292                 return $this->data;
1293         }
1294
1295         /**
1296          * @return array
1297          */
1298         public function getQueryValues() {
1299                 if ( $this->wasPosted ) {
1300                         return array();
1301                 } else {
1302                         return $this->data;
1303                 }
1304         }
1305
1306         public function getMethod() {
1307                 return $this->wasPosted ? 'POST' : 'GET';
1308         }
1309
1310         /**
1311          * @return bool
1312          */
1313         public function wasPosted() {
1314                 return $this->wasPosted;
1315         }
1316
1317         public function getCookie( $key, $prefix = null, $default = null ) {
1318                 return $default;
1319         }
1320
1321         public function checkSessionCookie() {
1322                 return false;
1323         }
1324
1325         public function getRequestURL() {
1326                 $this->notImplemented( __METHOD__ );
1327         }
1328
1329         /**
1330          * @param $name
1331          * @return bool|string
1332          */
1333         public function getHeader( $name ) {
1334                 return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
1335         }
1336
1337         /**
1338          * @param $name string
1339          * @param $val string
1340          */
1341         public function setHeader( $name, $val ) {
1342                 $this->headers[$name] = $val;
1343         }
1344
1345         /**
1346          * @param $key
1347          * @return mixed
1348          */
1349         public function getSessionData( $key ) {
1350                 if( isset( $this->session[$key] ) ) {
1351                         return $this->session[$key];
1352                 }
1353                 return null;
1354         }
1355
1356         /**
1357          * @param $key
1358          * @param $data
1359          */
1360         public function setSessionData( $key, $data ) {
1361                 $this->session[$key] = $data;
1362         }
1363
1364         /**
1365          * @return array|Mixed|null
1366          */
1367         public function getSessionArray() {
1368                 return $this->session;
1369         }
1370
1371         /**
1372          * @param array $extWhitelist
1373          * @return bool
1374          */
1375         public function isPathInfoBad( $extWhitelist = array() ) {
1376                 return false;
1377         }
1378
1379         /**
1380          * @param array $extWhitelist
1381          * @return bool
1382          */
1383         public function checkUrlExtension( $extWhitelist = array() ) {
1384                 return true;
1385         }
1386
1387         /**
1388          * @return string
1389          */
1390         protected function getRawIP() {
1391                 return '127.0.0.1';
1392         }
1393 }
1394
1395 /**
1396  * Similar to FauxRequest, but only fakes URL parameters and method
1397  * (POST or GET) and use the base request for the remaining stuff
1398  * (cookies, session and headers).
1399  *
1400  * @ingroup HTTP
1401  * @since 1.19
1402  */
1403 class DerivativeRequest extends FauxRequest {
1404         private $base;
1405
1406         public function __construct( WebRequest $base, $data, $wasPosted = false ) {
1407                 $this->base = $base;
1408                 parent::__construct( $data, $wasPosted );
1409         }
1410
1411         public function getCookie( $key, $prefix = null, $default = null ) {
1412                 return $this->base->getCookie( $key, $prefix, $default );
1413         }
1414
1415         public function checkSessionCookie() {
1416                 return $this->base->checkSessionCookie();
1417         }
1418
1419         public function getHeader( $name ) {
1420                 return $this->base->getHeader( $name );
1421         }
1422
1423         public function getAllHeaders() {
1424                 return $this->base->getAllHeaders();
1425         }
1426
1427         public function getSessionData( $key ) {
1428                 return $this->base->getSessionData( $key );
1429         }
1430
1431         public function setSessionData( $key, $data ) {
1432                 $this->base->setSessionData( $key, $data );
1433         }
1434
1435         public function getAcceptLang() {
1436                 return $this->base->getAcceptLang();
1437         }
1438
1439         public function getIP() {
1440                 return $this->base->getIP();
1441         }
1442 }