includes/WebRequest.php

   1 <?php
   2 /**
   3  * Deal with importing all those nasty 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 string $want 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, ) = 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 string $path the URL path given from the client
 237          * @param array $bases one or more URLs, optionally with $1 at the end
 238          * @param string $key 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 array $arr will be modified
 266          * @param bool $topLevel Specifies if the array passed is from the top
 267          * level of the source. In PHP5 magic_quotes only escapes the first level
 268          * of keys that belong to an array.
 269          * @return array the original array
 270          * @see http://www.php.net/manual/en/function.get-magic-quotes-gpc.php#49612
 271          */
 272         private function &fix_magic_quotes( &$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                         return $default;
 351                 }
 352         }
 353
 354         /**
 355          * Fetch a scalar from the input or return $default if it's not set.
 356          * Returns a string. Arrays are discarded. Useful for
 357          * non-freeform text inputs (e.g. predefined internal text keys
 358          * selected by a drop-down menu). For freeform input, see getText().
 359          *
 360          * @param $name String
 361          * @param string $default optional default (or NULL)
 362          * @return String
 363          */
 364         public function getVal( $name, $default = null ) {
 365                 $val = $this->getGPCVal( $this->data, $name, $default );
 366                 if ( is_array( $val ) ) {
 367                         $val = $default;
 368                 }
 369                 if ( is_null( $val ) ) {
 370                         return $val;
 371                 } else {
 372                         return (string)$val;
 373                 }
 374         }
 375
 376         /**
 377          * Set an arbitrary value into our get/post data.
 378          *
 379          * @param string $key key name to use
 380          * @param $value Mixed: value to set
 381          * @return Mixed: old value if one was present, null otherwise
 382          */
 383         public function setVal( $key, $value ) {
 384                 $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
 385                 $this->data[$key] = $value;
 386                 return $ret;
 387         }
 388
 389         /**
 390          * Unset an arbitrary value from our get/post data.
 391          *
 392          * @param string $key key name to use
 393          * @return Mixed: old value if one was present, null otherwise
 394          */
 395         public function unsetVal( $key ) {
 396                 if ( !isset( $this->data[$key] ) ) {
 397                         $ret = null;
 398                 } else {
 399                         $ret = $this->data[$key];
 400                         unset( $this->data[$key] );
 401                 }
 402                 return $ret;
 403         }
 404
 405         /**
 406          * Fetch an array from the input or return $default if it's not set.
 407          * If source was scalar, will return an array with a single element.
 408          * If no source and no default, returns NULL.
 409          *
 410          * @param $name String
 411          * @param array $default optional default (or NULL)
 412          * @return Array
 413          */
 414         public function getArray( $name, $default = null ) {
 415                 $val = $this->getGPCVal( $this->data, $name, $default );
 416                 if ( is_null( $val ) ) {
 417                         return null;
 418                 } else {
 419                         return (array)$val;
 420                 }
 421         }
 422
 423         /**
 424          * Fetch an array of integers, or return $default if it's not set.
 425          * If source was scalar, will return an array with a single element.
 426          * If no source and no default, returns NULL.
 427          * If an array is returned, contents are guaranteed to be integers.
 428          *
 429          * @param $name String
 430          * @param array $default option default (or NULL)
 431          * @return Array of ints
 432          */
 433         public function getIntArray( $name, $default = null ) {
 434                 $val = $this->getArray( $name, $default );
 435                 if ( is_array( $val ) ) {
 436                         $val = array_map( 'intval', $val );
 437                 }
 438                 return $val;
 439         }
 440
 441         /**
 442          * Fetch an integer value from the input or return $default if not set.
 443          * Guaranteed to return an integer; non-numeric input will typically
 444          * return 0.
 445          *
 446          * @param $name String
 447          * @param $default Integer
 448          * @return Integer
 449          */
 450         public function getInt( $name, $default = 0 ) {
 451                 return intval( $this->getVal( $name, $default ) );
 452         }
 453
 454         /**
 455          * Fetch an integer value from the input or return null if empty.
 456          * Guaranteed to return an integer or null; non-numeric input will
 457          * typically return null.
 458          *
 459          * @param $name String
 460          * @return Integer
 461          */
 462         public function getIntOrNull( $name ) {
 463                 $val = $this->getVal( $name );
 464                 return is_numeric( $val )
 465                         ? intval( $val )
 466                         : null;
 467         }
 468
 469         /**
 470          * Fetch a boolean value from the input or return $default if not set.
 471          * Guaranteed to return true or false, with normal PHP semantics for
 472          * boolean interpretation of strings.
 473          *
 474          * @param $name String
 475          * @param $default Boolean
 476          * @return Boolean
 477          */
 478         public function getBool( $name, $default = false ) {
 479                 return (bool)$this->getVal( $name, $default );
 480         }
 481
 482         /**
 483          * Fetch a boolean value from the input or return $default if not set.
 484          * Unlike getBool, the string "false" will result in boolean false, which is
 485          * useful when interpreting information sent from JavaScript.
 486          *
 487          * @param $name String
 488          * @param $default Boolean
 489          * @return Boolean
 490          */
 491         public function getFuzzyBool( $name, $default = false ) {
 492                 return $this->getBool( $name, $default ) && strcasecmp( $this->getVal( $name ), 'false' ) !== 0;
 493         }
 494
 495         /**
 496          * Return true if the named value is set in the input, whatever that
 497          * value is (even "0"). Return false if the named value is not set.
 498          * Example use is checking for the presence of check boxes in forms.
 499          *
 500          * @param $name String
 501          * @return Boolean
 502          */
 503         public function getCheck( $name ) {
 504                 # Checkboxes and buttons are only present when clicked
 505                 # Presence connotes truth, absence false
 506                 return $this->getVal( $name, null ) !== null;
 507         }
 508
 509         /**
 510          * Fetch a text string from the given array or return $default if it's not
 511          * set. Carriage returns are stripped from the text, and with some language
 512          * modules there is an input transliteration applied. This should generally
 513          * be used for form "<textarea>" and "<input>" fields. Used for
 514          * user-supplied freeform text input (for which input transformations may
 515          * be required - e.g.  Esperanto x-coding).
 516          *
 517          * @param $name String
 518          * @param string $default optional
 519          * @return String
 520          */
 521         public function getText( $name, $default = '' ) {
 522                 global $wgContLang;
 523                 $val = $this->getVal( $name, $default );
 524                 return str_replace( "\r\n", "\n",
 525                         $wgContLang->recodeInput( $val ) );
 526         }
 527
 528         /**
 529          * Extracts the given named values into an array.
 530          * If no arguments are given, returns all input values.
 531          * No transformation is performed on the values.
 532          *
 533          * @return array
 534          */
 535         public function getValues() {
 536                 $names = func_get_args();
 537                 if ( count( $names ) == 0 ) {
 538                         $names = array_keys( $this->data );
 539                 }
 540
 541                 $retVal = array();
 542                 foreach ( $names as $name ) {
 543                         $value = $this->getGPCVal( $this->data, $name, null );
 544                         if ( !is_null( $value ) ) {
 545                                 $retVal[$name] = $value;
 546                         }
 547                 }
 548                 return $retVal;
 549         }
 550
 551         /**
 552          * Returns the names of all input values excluding those in $exclude.
 553          *
 554          * @param $exclude Array
 555          * @return array
 556          */
 557         public function getValueNames( $exclude = array() ) {
 558                 return array_diff( array_keys( $this->getValues() ), $exclude );
 559         }
 560
 561         /**
 562          * Get the values passed in the query string.
 563          * No transformation is performed on the values.
 564          *
 565          * @return Array
 566          */
 567         public function getQueryValues() {
 568                 return $_GET;
 569         }
 570
 571         /**
 572          * Get the HTTP method used for this request.
 573          *
 574          * @return String
 575          */
 576         public function getMethod() {
 577                 return isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : 'GET';
 578         }
 579
 580         /**
 581          * Returns true if the present request was reached by a POST operation,
 582          * false otherwise (GET, HEAD, or command-line).
 583          *
 584          * Note that values retrieved by the object may come from the
 585          * GET URL etc even on a POST request.
 586          *
 587          * @return Boolean
 588          */
 589         public function wasPosted() {
 590                 return $this->getMethod() == 'POST';
 591         }
 592
 593         /**
 594          * Returns true if there is a session cookie set.
 595          * This does not necessarily mean that the user is logged in!
 596          *
 597          * If you want to check for an open session, use session_id()
 598          * instead; that will also tell you if the session was opened
 599          * during the current request (in which case the cookie will
 600          * be sent back to the client at the end of the script run).
 601          *
 602          * @return Boolean
 603          */
 604         public function checkSessionCookie() {
 605                 return isset( $_COOKIE[session_name()] );
 606         }
 607
 608         /**
 609          * Get a cookie from the $_COOKIE jar
 610          *
 611          * @param string $key the name of the cookie
 612          * @param string $prefix a prefix to use for the cookie name, if not $wgCookiePrefix
 613          * @param $default Mixed: what to return if the value isn't found
 614          * @return Mixed: cookie value or $default if the cookie not set
 615          */
 616         public function getCookie( $key, $prefix = null, $default = null ) {
 617                 if ( $prefix === null ) {
 618                         global $wgCookiePrefix;
 619                         $prefix = $wgCookiePrefix;
 620                 }
 621                 return $this->getGPCVal( $_COOKIE, $prefix . $key, $default );
 622         }
 623
 624         /**
 625          * Return the path and query string portion of the request URI.
 626          * This will be suitable for use as a relative link in HTML output.
 627          *
 628          * @throws MWException
 629          * @return String
 630          */
 631         public function getRequestURL() {
 632                 if ( isset( $_SERVER['REQUEST_URI'] ) && strlen( $_SERVER['REQUEST_URI'] ) ) {
 633                         $base = $_SERVER['REQUEST_URI'];
 634                 } elseif ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] ) && strlen( $_SERVER['HTTP_X_ORIGINAL_URL'] ) ) {
 635                         // Probably IIS; doesn't set REQUEST_URI
 636                         $base = $_SERVER['HTTP_X_ORIGINAL_URL'];
 637                 } elseif ( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 638                         $base = $_SERVER['SCRIPT_NAME'];
 639                         if ( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 640                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 641                         }
 642                 } else {
 643                         // This shouldn't happen!
 644                         throw new MWException( "Web server doesn't provide either " .
 645                                 "REQUEST_URI, HTTP_X_ORIGINAL_URL or SCRIPT_NAME. Report details " .
 646                                 "of your web server configuration to http://bugzilla.wikimedia.org/" );
 647                 }
 648                 // User-agents should not send a fragment with the URI, but
 649                 // if they do, and the web server passes it on to us, we
 650                 // need to strip it or we get false-positive redirect loops
 651                 // or weird output URLs
 652                 $hash = strpos( $base, '#' );
 653                 if ( $hash !== false ) {
 654                         $base = substr( $base, 0, $hash );
 655                 }
 656
 657                 if ( $base[0] == '/' ) {
 658                         // More than one slash will look like it is protocol relative
 659                         return preg_replace( '!^/+!', '/', $base );
 660                 } else {
 661                         // We may get paths with a host prepended; strip it.
 662                         return preg_replace( '!^[^:]+://[^/]+/+!', '/', $base );
 663                 }
 664         }
 665
 666         /**
 667          * Return the request URI with the canonical service and hostname, path,
 668          * and query string. This will be suitable for use as an absolute link
 669          * in HTML or other output.
 670          *
 671          * If $wgServer is protocol-relative, this will return a fully
 672          * qualified URL with the protocol that was used for this request.
 673          *
 674          * @return String
 675          */
 676         public function getFullRequestURL() {
 677                 return wfExpandUrl( $this->getRequestURL(), PROTO_CURRENT );
 678         }
 679
 680         /**
 681          * Take an arbitrary query and rewrite the present URL to include it
 682          * @param string $query query string fragment; do not include initial '?'
 683          *
 684          * @return String
 685          */
 686         public function appendQuery( $query ) {
 687                 return $this->appendQueryArray( wfCgiToArray( $query ) );
 688         }
 689
 690         /**
 691          * HTML-safe version of appendQuery().
 692          * @deprecated: Deprecated in 1.20, warnings in 1.21, remove in 1.22.
 693          *
 694          * @param string $query query string fragment; do not include initial '?'
 695          * @return String
 696          */
 697         public function escapeAppendQuery( $query ) {
 698                 return htmlspecialchars( $this->appendQuery( $query ) );
 699         }
 700
 701         /**
 702          * @param $key
 703          * @param $value
 704          * @param $onlyquery bool
 705          * @return String
 706          */
 707         public function appendQueryValue( $key, $value, $onlyquery = false ) {
 708                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 709         }
 710
 711         /**
 712          * Appends or replaces value of query variables.
 713          *
 714          * @param array $array of values to replace/add to query
 715          * @param bool $onlyquery whether to only return the query string and not
 716          *                   the complete URL
 717          * @return String
 718          */
 719         public function appendQueryArray( $array, $onlyquery = false ) {
 720                 global $wgTitle;
 721                 $newquery = $this->getQueryValues();
 722                 unset( $newquery['title'] );
 723                 $newquery = array_merge( $newquery, $array );
 724                 $query = wfArrayToCgi( $newquery );
 725                 return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
 726         }
 727
 728         /**
 729          * Check for limit and offset parameters on the input, and return sensible
 730          * defaults if not given. The limit must be positive and is capped at 5000.
 731          * Offset must be positive but is not capped.
 732          *
 733          * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
 734          * @param string $optionname to specify an option other than rclimit to pull from.
 735          * @return array first element is limit, second is offset
 736          */
 737         public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 738                 global $wgUser;
 739
 740                 $limit = $this->getInt( 'limit', 0 );
 741                 if ( $limit < 0 ) {
 742                         $limit = 0;
 743                 }
 744                 if ( ( $limit == 0 ) && ( $optionname != '' ) ) {
 745                         $limit = $wgUser->getIntOption( $optionname );
 746                 }
 747                 if ( $limit <= 0 ) {
 748                         $limit = $deflimit;
 749                 }
 750                 if ( $limit > 5000 ) {
 751                         $limit = 5000; # We have *some* limits...
 752                 }
 753
 754                 $offset = $this->getInt( 'offset', 0 );
 755                 if ( $offset < 0 ) {
 756                         $offset = 0;
 757                 }
 758
 759                 return array( $limit, $offset );
 760         }
 761
 762         /**
 763          * Return the path to the temporary file where PHP has stored the upload.
 764          *
 765          * @param $key String:
 766          * @return string or NULL if no such file.
 767          */
 768         public function getFileTempname( $key ) {
 769                 $file = new WebRequestUpload( $this, $key );
 770                 return $file->getTempName();
 771         }
 772
 773         /**
 774          * Return the size of the upload, or 0.
 775          *
 776          * @deprecated since 1.17
 777          * @param $key String:
 778          * @return integer
 779          */
 780         public function getFileSize( $key ) {
 781                 wfDeprecated( __METHOD__, '1.17' );
 782                 $file = new WebRequestUpload( $this, $key );
 783                 return $file->getSize();
 784         }
 785
 786         /**
 787          * Return the upload error or 0
 788          *
 789          * @param $key String:
 790          * @return integer
 791          */
 792         public function getUploadError( $key ) {
 793                 $file = new WebRequestUpload( $this, $key );
 794                 return $file->getError();
 795         }
 796
 797         /**
 798          * Return the original filename of the uploaded file, as reported by
 799          * the submitting user agent. HTML-style character entities are
 800          * interpreted and normalized to Unicode normalization form C, in part
 801          * to deal with weird input from Safari with non-ASCII filenames.
 802          *
 803          * Other than this the name is not verified for being a safe filename.
 804          *
 805          * @param $key String:
 806          * @return string or NULL if no such file.
 807          */
 808         public function getFileName( $key ) {
 809                 $file = new WebRequestUpload( $this, $key );
 810                 return $file->getName();
 811         }
 812
 813         /**
 814          * Return a WebRequestUpload object corresponding to the key
 815          *
 816          * @param $key string
 817          * @return WebRequestUpload
 818          */
 819         public function getUpload( $key ) {
 820                 return new WebRequestUpload( $this, $key );
 821         }
 822
 823         /**
 824          * Return a handle to WebResponse style object, for setting cookies,
 825          * headers and other stuff, for Request being worked on.
 826          *
 827          * @return WebResponse
 828          */
 829         public function response() {
 830                 /* Lazy initialization of response object for this request */
 831                 if ( !is_object( $this->response ) ) {
 832                         $class = ( $this instanceof FauxRequest ) ? 'FauxResponse' : 'WebResponse';
 833                         $this->response = new $class();
 834                 }
 835                 return $this->response;
 836         }
 837
 838         /**
 839          * Initialise the header list
 840          */
 841         private function initHeaders() {
 842                 if ( count( $this->headers ) ) {
 843                         return;
 844                 }
 845
 846                 if ( function_exists( 'apache_request_headers' ) ) {
 847                         foreach ( apache_request_headers() as $tempName => $tempValue ) {
 848                                 $this->headers[strtoupper( $tempName )] = $tempValue;
 849                         }
 850                 } else {
 851                         foreach ( $_SERVER as $name => $value ) {
 852                                 if ( substr( $name, 0, 5 ) === 'HTTP_' ) {
 853                                         $name = str_replace( '_', '-', substr( $name, 5 ) );
 854                                         $this->headers[$name] = $value;
 855                                 } elseif ( $name === 'CONTENT_LENGTH' ) {
 856                                         $this->headers['CONTENT-LENGTH'] = $value;
 857                                 }
 858                         }
 859                 }
 860         }
 861
 862         /**
 863          * Get an array containing all request headers
 864          *
 865          * @return Array mapping header name to its value
 866          */
 867         public function getAllHeaders() {
 868                 $this->initHeaders();
 869                 return $this->headers;
 870         }
 871
 872         /**
 873          * Get a request header, or false if it isn't set
 874          * @param string $name case-insensitive header name
 875          *
 876          * @return string|bool False on failure
 877          */
 878         public function getHeader( $name ) {
 879                 $this->initHeaders();
 880                 $name = strtoupper( $name );
 881                 if ( isset( $this->headers[$name] ) ) {
 882                         return $this->headers[$name];
 883                 } else {
 884                         return false;
 885                 }
 886         }
 887
 888         /**
 889          * Get data from $_SESSION
 890          *
 891          * @param string $key name of key in $_SESSION
 892          * @return Mixed
 893          */
 894         public function getSessionData( $key ) {
 895                 if ( !isset( $_SESSION[$key] ) ) {
 896                         return null;
 897                 }
 898                 return $_SESSION[$key];
 899         }
 900
 901         /**
 902          * Set session data
 903          *
 904          * @param string $key name of key in $_SESSION
 905          * @param $data Mixed
 906          */
 907         public function setSessionData( $key, $data ) {
 908                 $_SESSION[$key] = $data;
 909         }
 910
 911         /**
 912          * Check if Internet Explorer will detect an incorrect cache extension in
 913          * PATH_INFO or QUERY_STRING. If the request can't be allowed, show an error
 914          * message or redirect to a safer URL. Returns true if the URL is OK, and
 915          * false if an error message has been shown and the request should be aborted.
 916          *
 917          * @param $extWhitelist array
 918          * @throws HttpError
 919          * @return bool
 920          */
 921         public function checkUrlExtension( $extWhitelist = array() ) {
 922                 global $wgScriptExtension;
 923                 $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
 924                 if ( IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist ) ) {
 925                         if ( !$this->wasPosted() ) {
 926                                 $newUrl = IEUrlExtension::fixUrlForIE6(
 927                                         $this->getFullRequestURL(), $extWhitelist );
 928                                 if ( $newUrl !== false ) {
 929                                         $this->doSecurityRedirect( $newUrl );
 930                                         return false;
 931                                 }
 932                         }
 933                         throw new HttpError( 403,
 934                                 'Invalid file extension found in the path info or query string.' );
 935                 }
 936                 return true;
 937         }
 938
 939         /**
 940          * Attempt to redirect to a URL with a QUERY_STRING that's not dangerous in
 941          * IE 6. Returns true if it was successful, false otherwise.
 942          *
 943          * @param $url string
 944          * @return bool
 945          */
 946         protected function doSecurityRedirect( $url ) {
 947                 header( 'Location: ' . $url );
 948                 header( 'Content-Type: text/html' );
 949                 $encUrl = htmlspecialchars( $url );
 950                 echo <<<HTML
 951 <html>
 952 <head>
 953 <title>Security redirect</title>
 954 </head>
 955 <body>
 956 <h1>Security redirect</h1>
 957 <p>
 958 We can't serve non-HTML content from the URL you have requested, because
 959 Internet Explorer would interpret it as an incorrect and potentially dangerous
 960 content type.</p>
 961 <p>Instead, please use <a href="$encUrl">this URL</a>, which is the same as the URL you have requested, except that
 962 "&amp;*" is appended. This prevents Internet Explorer from seeing a bogus file
 963 extension.
 964 </p>
 965 </body>
 966 </html>
 967 HTML;
 968                 echo "\n";
 969                 return true;
 970         }
 971
 972         /**
 973          * Returns true if the PATH_INFO ends with an extension other than a script
 974          * extension. This could confuse IE for scripts that send arbitrary data which
 975          * is not HTML but may be detected as such.
 976          *
 977          * Various past attempts to use the URL to make this check have generally
 978          * run up against the fact that CGI does not provide a standard method to
 979          * determine the URL. PATH_INFO may be mangled (e.g. if cgi.fix_pathinfo=0),
 980          * but only by prefixing it with the script name and maybe some other stuff,
 981          * the extension is not mangled. So this should be a reasonably portable
 982          * way to perform this security check.
 983          *
 984          * Also checks for anything that looks like a file extension at the end of
 985          * QUERY_STRING, since IE 6 and earlier will use this to get the file type
 986          * if there was no dot before the question mark (bug 28235).
 987          *
 988          * @deprecated Use checkUrlExtension().
 989          *
 990          * @param $extWhitelist array
 991          *
 992          * @return bool
 993          */
 994         public function isPathInfoBad( $extWhitelist = array() ) {
 995                 wfDeprecated( __METHOD__, '1.17' );
 996                 global $wgScriptExtension;
 997                 $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
 998                 return IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist );
 999         }
1000
1001         /**
1002          * Parse the Accept-Language header sent by the client into an array
1003          * @return array array( languageCode => q-value ) sorted by q-value in descending order then
1004          *                                                appearing time in the header in ascending order.
1005          * May contain the "language" '*', which applies to languages other than those explicitly listed.
1006          * This is aligned with rfc2616 section 14.4
1007          * Preference for earlier languages appears in rfc3282 as an extension to HTTP/1.1.
1008          */
1009         public function getAcceptLang() {
1010                 // Modified version of code found at http://www.thefutureoftheweb.com/blog/use-accept-language-header
1011                 $acceptLang = $this->getHeader( 'Accept-Language' );
1012                 if ( !$acceptLang ) {
1013                         return array();
1014                 }
1015
1016                 // Return the language codes in lower case
1017                 $acceptLang = strtolower( $acceptLang );
1018
1019                 // Break up string into pieces (languages and q factors)
1020                 $lang_parse = null;
1021                 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})?)?)?/',
1022                         $acceptLang, $lang_parse );
1023
1024                 if ( !count( $lang_parse[1] ) ) {
1025                         return array();
1026                 }
1027
1028                 $langcodes = $lang_parse[1];
1029                 $qvalues = $lang_parse[4];
1030                 $indices = range( 0, count( $lang_parse[1] ) - 1 );
1031
1032                 // Set default q factor to 1
1033                 foreach ( $indices as $index ) {
1034                         if ( $qvalues[$index] === '' ) {
1035                                 $qvalues[$index] = 1;
1036                         } elseif ( $qvalues[$index] == 0 ) {
1037                                 unset( $langcodes[$index], $qvalues[$index], $indices[$index] );
1038                         }
1039                 }
1040
1041                 // Sort list. First by $qvalues, then by order. Reorder $langcodes the same way
1042                 array_multisort( $qvalues, SORT_DESC, SORT_NUMERIC, $indices, $langcodes );
1043
1044                 // Create a list like "en" => 0.8
1045                 $langs = array_combine( $langcodes, $qvalues );
1046
1047                 return $langs;
1048         }
1049
1050         /**
1051          * Fetch the raw IP from the request
1052          *
1053          * @since 1.19
1054          *
1055          * @throws MWException
1056          * @return String
1057          */
1058         protected function getRawIP() {
1059                 if ( !isset( $_SERVER['REMOTE_ADDR'] ) ) {
1060                         return null;
1061                 }
1062
1063                 if ( is_array( $_SERVER['REMOTE_ADDR'] ) || strpos( $_SERVER['REMOTE_ADDR'], ',' ) !== false ) {
1064                         throw new MWException( __METHOD__ . " : Could not determine the remote IP address due to multiple values." );
1065                 } else {
1066                         $ipchain = $_SERVER['REMOTE_ADDR'];
1067                 }
1068
1069                 return IP::canonicalize( $ipchain );
1070         }
1071
1072         /**
1073          * Work out the IP address based on various globals
1074          * For trusted proxies, use the XFF client IP (first of the chain)
1075          *
1076          * @since 1.19
1077          *
1078          * @throws MWException
1079          * @return string
1080          */
1081         public function getIP() {
1082                 global $wgUsePrivateIPs;
1083
1084                 # Return cached result
1085                 if ( $this->ip !== null ) {
1086                         return $this->ip;
1087                 }
1088
1089                 # collect the originating ips
1090                 $ip = $this->getRawIP();
1091
1092                 # Append XFF
1093                 $forwardedFor = $this->getHeader( 'X-Forwarded-For' );
1094                 if ( $forwardedFor !== false ) {
1095                         $ipchain = array_map( 'trim', explode( ',', $forwardedFor ) );
1096                         $ipchain = array_reverse( $ipchain );
1097                         if ( $ip ) {
1098                                 array_unshift( $ipchain, $ip );
1099                         }
1100
1101                         # Step through XFF list and find the last address in the list which is a
1102                         # trusted server. Set $ip to the IP address given by that trusted server,
1103                         # unless the address is not sensible (e.g. private). However, prefer private
1104                         # IP addresses over proxy servers controlled by this site (more sensible).
1105                         foreach ( $ipchain as $i => $curIP ) {
1106                                 $curIP = IP::canonicalize( $curIP );
1107                                 if ( wfIsTrustedProxy( $curIP ) && isset( $ipchain[$i + 1] ) ) {
1108                                         if ( wfIsConfiguredProxy( $curIP ) || // bug 48919
1109                                                 ( IP::isPublic( $ipchain[$i + 1] ) || $wgUsePrivateIPs )
1110                                         ) {
1111                                                 $ip = IP::canonicalize( $ipchain[$i + 1] );
1112                                                 continue;
1113                                         }
1114                                 }
1115                                 break;
1116                         }
1117                 }
1118
1119                 # Allow extensions to improve our guess
1120                 wfRunHooks( 'GetIP', array( &$ip ) );
1121
1122                 if ( !$ip ) {
1123                         throw new MWException( "Unable to determine IP" );
1124                 }
1125
1126                 wfDebug( "IP: $ip\n" );
1127                 $this->ip = $ip;
1128                 return $ip;
1129         }
1130
1131         /**
1132          * @param string $ip
1133          * @return void
1134          * @since 1.21
1135          */
1136         public function setIP( $ip ) {
1137                 $this->ip = $ip;
1138         }
1139 }
1140
1141 /**
1142  * Object to access the $_FILES array
1143  */
1144 class WebRequestUpload {
1145         protected $request;
1146         protected $doesExist;
1147         protected $fileInfo;
1148
1149         /**
1150          * Constructor. Should only be called by WebRequest
1151          *
1152          * @param $request WebRequest The associated request
1153          * @param string $key Key in $_FILES array (name of form field)
1154          */
1155         public function __construct( $request, $key ) {
1156                 $this->request = $request;
1157                 $this->doesExist = isset( $_FILES[$key] );
1158                 if ( $this->doesExist ) {
1159                         $this->fileInfo = $_FILES[$key];
1160                 }
1161         }
1162
1163         /**
1164          * Return whether a file with this name was uploaded.
1165          *
1166          * @return bool
1167          */
1168         public function exists() {
1169                 return $this->doesExist;
1170         }
1171
1172         /**
1173          * Return the original filename of the uploaded file
1174          *
1175          * @return mixed Filename or null if non-existent
1176          */
1177         public function getName() {
1178                 if ( !$this->exists() ) {
1179                         return null;
1180                 }
1181
1182                 global $wgContLang;
1183                 $name = $this->fileInfo['name'];
1184
1185                 # Safari sends filenames in HTML-encoded Unicode form D...
1186                 # Horrid and evil! Let's try to make some kind of sense of it.
1187                 $name = Sanitizer::decodeCharReferences( $name );
1188                 $name = $wgContLang->normalize( $name );
1189                 wfDebug( __METHOD__ . ": {$this->fileInfo['name']} normalized to '$name'\n" );
1190                 return $name;
1191         }
1192
1193         /**
1194          * Return the file size of the uploaded file
1195          *
1196          * @return int File size or zero if non-existent
1197          */
1198         public function getSize() {
1199                 if ( !$this->exists() ) {
1200                         return 0;
1201                 }
1202
1203                 return $this->fileInfo['size'];
1204         }
1205
1206         /**
1207          * Return the path to the temporary file
1208          *
1209          * @return mixed Path or null if non-existent
1210          */
1211         public function getTempName() {
1212                 if ( !$this->exists() ) {
1213                         return null;
1214                 }
1215
1216                 return $this->fileInfo['tmp_name'];
1217         }
1218
1219         /**
1220          * Return the upload error. See link for explanation
1221          * http://www.php.net/manual/en/features.file-upload.errors.php
1222          *
1223          * @return int One of the UPLOAD_ constants, 0 if non-existent
1224          */
1225         public function getError() {
1226                 if ( !$this->exists() ) {
1227                         return 0; # UPLOAD_ERR_OK
1228                 }
1229
1230                 return $this->fileInfo['error'];
1231         }
1232
1233         /**
1234          * Returns whether this upload failed because of overflow of a maximum set
1235          * in php.ini
1236          *
1237          * @return bool
1238          */
1239         public function isIniSizeOverflow() {
1240                 if ( $this->getError() == UPLOAD_ERR_INI_SIZE ) {
1241                         # PHP indicated that upload_max_filesize is exceeded
1242                         return true;
1243                 }
1244
1245                 $contentLength = $this->request->getHeader( 'CONTENT_LENGTH' );
1246                 if ( $contentLength > wfShorthandToInteger( ini_get( 'post_max_size' ) ) ) {
1247                         # post_max_size is exceeded
1248                         return true;
1249                 }
1250
1251                 return false;
1252         }
1253 }
1254
1255 /**
1256  * WebRequest clone which takes values from a provided array.
1257  *
1258  * @ingroup HTTP
1259  */
1260 class FauxRequest extends WebRequest {
1261         private $wasPosted = false;
1262         private $session = array();
1263
1264         /**
1265          * @param array $data of *non*-urlencoded key => value pairs, the
1266          *   fake GET/POST values
1267          * @param bool $wasPosted whether to treat the data as POST
1268          * @param $session Mixed: session array or null
1269          * @throws MWException
1270          */
1271         public function __construct( $data = array(), $wasPosted = false, $session = null ) {
1272                 if ( is_array( $data ) ) {
1273                         $this->data = $data;
1274                 } else {
1275                         throw new MWException( "FauxRequest() got bogus data" );
1276                 }
1277                 $this->wasPosted = $wasPosted;
1278                 if ( $session ) {
1279                         $this->session = $session;
1280                 }
1281         }
1282
1283         /**
1284          * @param $method string
1285          * @throws MWException
1286          */
1287         private function notImplemented( $method ) {
1288                 throw new MWException( "{$method}() not implemented" );
1289         }
1290
1291         /**
1292          * @param $name string
1293          * @param $default string
1294          * @return string
1295          */
1296         public function getText( $name, $default = '' ) {
1297                 # Override; don't recode since we're using internal data
1298                 return (string)$this->getVal( $name, $default );
1299         }
1300
1301         /**
1302          * @return Array
1303          */
1304         public function getValues() {
1305                 return $this->data;
1306         }
1307
1308         /**
1309          * @return array
1310          */
1311         public function getQueryValues() {
1312                 if ( $this->wasPosted ) {
1313                         return array();
1314                 } else {
1315                         return $this->data;
1316                 }
1317         }
1318
1319         public function getMethod() {
1320                 return $this->wasPosted ? 'POST' : 'GET';
1321         }
1322
1323         /**
1324          * @return bool
1325          */
1326         public function wasPosted() {
1327                 return $this->wasPosted;
1328         }
1329
1330         public function getCookie( $key, $prefix = null, $default = null ) {
1331                 return $default;
1332         }
1333
1334         public function checkSessionCookie() {
1335                 return false;
1336         }
1337
1338         public function getRequestURL() {
1339                 $this->notImplemented( __METHOD__ );
1340         }
1341
1342         /**
1343          * @param string $name The name of the header to get (case insensitive).
1344          * @return bool|string
1345          */
1346         public function getHeader( $name ) {
1347                 $name = strtoupper( $name );
1348                 return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
1349         }
1350
1351         /**
1352          * @param $name string
1353          * @param $val string
1354          */
1355         public function setHeader( $name, $val ) {
1356                 $name = strtoupper( $name );
1357                 $this->headers[$name] = $val;
1358         }
1359
1360         /**
1361          * @param $key
1362          * @return mixed
1363          */
1364         public function getSessionData( $key ) {
1365                 if ( isset( $this->session[$key] ) ) {
1366                         return $this->session[$key];
1367                 }
1368                 return null;
1369         }
1370
1371         /**
1372          * @param $key
1373          * @param $data
1374          */
1375         public function setSessionData( $key, $data ) {
1376                 $this->session[$key] = $data;
1377         }
1378
1379         /**
1380          * @return array|Mixed|null
1381          */
1382         public function getSessionArray() {
1383                 return $this->session;
1384         }
1385
1386         /**
1387          * @param array $extWhitelist
1388          * @return bool
1389          */
1390         public function isPathInfoBad( $extWhitelist = array() ) {
1391                 return false;
1392         }
1393
1394         /**
1395          * @param array $extWhitelist
1396          * @return bool
1397          */
1398         public function checkUrlExtension( $extWhitelist = array() ) {
1399                 return true;
1400         }
1401
1402         /**
1403          * @return string
1404          */
1405         protected function getRawIP() {
1406                 return '127.0.0.1';
1407         }
1408 }
1409
1410 /**
1411  * Similar to FauxRequest, but only fakes URL parameters and method
1412  * (POST or GET) and use the base request for the remaining stuff
1413  * (cookies, session and headers).
1414  *
1415  * @ingroup HTTP
1416  * @since 1.19
1417  */
1418 class DerivativeRequest extends FauxRequest {
1419         private $base;
1420
1421         public function __construct( WebRequest $base, $data, $wasPosted = false ) {
1422                 $this->base = $base;
1423                 parent::__construct( $data, $wasPosted );
1424         }
1425
1426         public function getCookie( $key, $prefix = null, $default = null ) {
1427                 return $this->base->getCookie( $key, $prefix, $default );
1428         }
1429
1430         public function checkSessionCookie() {
1431                 return $this->base->checkSessionCookie();
1432         }
1433
1434         public function getHeader( $name ) {
1435                 return $this->base->getHeader( $name );
1436         }
1437
1438         public function getAllHeaders() {
1439                 return $this->base->getAllHeaders();
1440         }
1441
1442         public function getSessionData( $key ) {
1443                 return $this->base->getSessionData( $key );
1444         }
1445
1446         public function setSessionData( $key, $data ) {
1447                 $this->base->setSessionData( $key, $data );
1448         }
1449
1450         public function getAcceptLang() {
1451                 return $this->base->getAcceptLang();
1452         }
1453
1454         public function getIP() {
1455                 return $this->base->getIP();
1456         }
1457 }