includes/WebRequest.php

   1 <?php
   2 /**
   3  * Deal with importing all those nasssty globals and things
   4  */
   5
   6 # Copyright (C) 2003 Brion Vibber <brion@pobox.com>
   7 # http://www.mediawiki.org/
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License along
  20 # with this program; if not, write to the Free Software Foundation, Inc.,
  21 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22 # http://www.gnu.org/copyleft/gpl.html
  23
  24
  25 /**
  26  * Some entry points may use this file without first enabling the
  27  * autoloader.
  28  */
  29 if ( !function_exists( '__autoload' ) ) {
  30         require_once( dirname(__FILE__) . '/normal/UtfNormal.php' );
  31 }
  32
  33 /**
  34  * The WebRequest class encapsulates getting at data passed in the
  35  * URL or via a POSTed form, handling remove of "magic quotes" slashes,
  36  * stripping illegal input characters and normalizing Unicode sequences.
  37  *
  38  * Usually this is used via a global singleton, $wgRequest. You should
  39  * not create a second WebRequest object; make a FauxRequest object if
  40  * you want to pass arbitrary data to some function in place of the web
  41  * input.
  42  *
  43  * @ingroup HTTP
  44  */
  45 class WebRequest {
  46         var $data = array();
  47         var $headers;
  48         private $_response;
  49
  50         function __construct() {
  51                 /// @fixme This preemptive de-quoting can interfere with other web libraries
  52                 ///        and increases our memory footprint. It would be cleaner to do on
  53                 ///        demand; but currently we have no wrapper for $_SERVER etc.
  54                 $this->checkMagicQuotes();
  55
  56                 // POST overrides GET data
  57                 // We don't use $_REQUEST here to avoid interference from cookies...
  58                 $this->data = wfArrayMerge( $_GET, $_POST );
  59         }
  60
  61         /**
  62          * Check for title, action, and/or variant data in the URL
  63          * and interpolate it into the GET variables.
  64          * This should only be run after $wgContLang is available,
  65          * as we may need the list of language variants to determine
  66          * available variant URLs.
  67          */
  68         function interpolateTitle() {
  69                 global $wgUsePathInfo;
  70                 if ( $wgUsePathInfo ) {
  71                         // PATH_INFO is mangled due to http://bugs.php.net/bug.php?id=31892
  72                         // And also by Apache 2.x, double slashes are converted to single slashes.
  73                         // So we will use REQUEST_URI if possible.
  74                         $matches = array();
  75                         if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
  76                                 // Slurp out the path portion to examine...
  77                                 $url = $_SERVER['REQUEST_URI'];
  78                                 if ( !preg_match( '!^https?://!', $url ) ) {
  79                                         $url = 'http://unused' . $url;
  80                                 }
  81                                 $a = parse_url( $url );
  82                                 if( $a ) {
  83                                         $path = isset( $a['path'] ) ? $a['path'] : '';
  84
  85                                         global $wgScript;
  86                                         if( $path == $wgScript ) {
  87                                                 // Script inside a rewrite path?
  88                                                 // Abort to keep from breaking...
  89                                                 return;
  90                                         }
  91                                         // Raw PATH_INFO style
  92                                         $matches = $this->extractTitle( $path, "$wgScript/$1" );
  93
  94                                         global $wgArticlePath;
  95                                         if( !$matches && $wgArticlePath ) {
  96                                                 $matches = $this->extractTitle( $path, $wgArticlePath );
  97                                         }
  98
  99                                         global $wgActionPaths;
 100                                         if( !$matches && $wgActionPaths ) {
 101                                                 $matches = $this->extractTitle( $path, $wgActionPaths, 'action' );
 102                                         }
 103
 104                                         global $wgVariantArticlePath, $wgContLang;
 105                                         if( !$matches && $wgVariantArticlePath ) {
 106                                                 $variantPaths = array();
 107                                                 foreach( $wgContLang->getVariants() as $variant ) {
 108                                                         $variantPaths[$variant] =
 109                                                                 str_replace( '$2', $variant, $wgVariantArticlePath );
 110                                                 }
 111                                                 $matches = $this->extractTitle( $path, $variantPaths, 'variant' );
 112                                         }
 113                                 }
 114                         } elseif ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
 115                                 // Mangled PATH_INFO
 116                                 // http://bugs.php.net/bug.php?id=31892
 117                                 // Also reported when ini_get('cgi.fix_pathinfo')==false
 118                                 $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );
 119
 120                         } elseif ( isset( $_SERVER['PATH_INFO'] ) && ($_SERVER['PATH_INFO'] != '') ) {
 121                                 // Regular old PATH_INFO yay
 122                                 $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
 123                         }
 124                         foreach( $matches as $key => $val) {
 125                                 $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
 126                         }
 127                 }
 128         }
 129
 130         /**
 131          * Internal URL rewriting function; tries to extract page title and,
 132          * optionally, one other fixed parameter value from a URL path.
 133          *
 134          * @param $path string: the URL path given from the client
 135          * @param $bases array: one or more URLs, optionally with $1 at the end
 136          * @param $key string: if provided, the matching key in $bases will be
 137          *             passed on as the value of this URL parameter
 138          * @return array of URL variables to interpolate; empty if no match
 139          */
 140         private function extractTitle( $path, $bases, $key=false ) {
 141                 foreach( (array)$bases as $keyValue => $base ) {
 142                         // Find the part after $wgArticlePath
 143                         $base = str_replace( '$1', '', $base );
 144                         $baseLen = strlen( $base );
 145                         if( substr( $path, 0, $baseLen ) == $base ) {
 146                                 $raw = substr( $path, $baseLen );
 147                                 if( $raw !== '' ) {
 148                                         $matches = array( 'title' => rawurldecode( $raw ) );
 149                                         if( $key ) {
 150                                                 $matches[$key] = $keyValue;
 151                                         }
 152                                         return $matches;
 153                                 }
 154                         }
 155                 }
 156                 return array();
 157         }
 158
 159         /**
 160          * Recursively strips slashes from the given array;
 161          * used for undoing the evil that is magic_quotes_gpc.
 162          * @param $arr array: will be modified
 163          * @return array the original array
 164          * @private
 165          */
 166         function &fix_magic_quotes( &$arr ) {
 167                 foreach( $arr as $key => $val ) {
 168                         if( is_array( $val ) ) {
 169                                 $this->fix_magic_quotes( $arr[$key] );
 170                         } else {
 171                                 $arr[$key] = stripslashes( $val );
 172                         }
 173                 }
 174                 return $arr;
 175         }
 176
 177         /**
 178          * If magic_quotes_gpc option is on, run the global arrays
 179          * through fix_magic_quotes to strip out the stupid slashes.
 180          * WARNING: This should only be done once! Running a second
 181          * time could damage the values.
 182          * @private
 183          */
 184         function checkMagicQuotes() {
 185                 if ( function_exists( 'get_magic_quotes_gpc' ) && get_magic_quotes_gpc() ) {
 186                         $this->fix_magic_quotes( $_COOKIE );
 187                         $this->fix_magic_quotes( $_ENV );
 188                         $this->fix_magic_quotes( $_GET );
 189                         $this->fix_magic_quotes( $_POST );
 190                         $this->fix_magic_quotes( $_REQUEST );
 191                         $this->fix_magic_quotes( $_SERVER );
 192                 }
 193         }
 194
 195         /**
 196          * Recursively normalizes UTF-8 strings in the given array.
 197          * @param $data string or array
 198          * @return cleaned-up version of the given
 199          * @private
 200          */
 201         function normalizeUnicode( $data ) {
 202                 if( is_array( $data ) ) {
 203                         foreach( $data as $key => $val ) {
 204                                 $data[$key] = $this->normalizeUnicode( $val );
 205                         }
 206                 } else {
 207                         $data = UtfNormal::cleanUp( $data );
 208                 }
 209                 return $data;
 210         }
 211
 212         /**
 213          * Fetch a value from the given array or return $default if it's not set.
 214          *
 215          * @param $arr array
 216          * @param $name string
 217          * @param $default mixed
 218          * @return mixed
 219          * @private
 220          */
 221         function getGPCVal( $arr, $name, $default ) {
 222                 if( isset( $arr[$name] ) ) {
 223                         global $wgContLang;
 224                         $data = $arr[$name];
 225                         if( isset( $_GET[$name] ) && !is_array( $data ) ) {
 226                                 # Check for alternate/legacy character encoding.
 227                                 if( isset( $wgContLang ) ) {
 228                                         $data = $wgContLang->checkTitleEncoding( $data );
 229                                 }
 230                         }
 231                         $data = $this->normalizeUnicode( $data );
 232                         return $data;
 233                 } else {
 234                         return $default;
 235                 }
 236         }
 237
 238         /**
 239          * Fetch a scalar from the input or return $default if it's not set.
 240          * Returns a string. Arrays are discarded. Useful for
 241          * non-freeform text inputs (e.g. predefined internal text keys
 242          * selected by a drop-down menu). For freeform input, see getText().
 243          *
 244          * @param $name string
 245          * @param $default string: optional default (or NULL)
 246          * @return string
 247          */
 248         function getVal( $name, $default = NULL ) {
 249                 $val = $this->getGPCVal( $this->data, $name, $default );
 250                 if( is_array( $val ) ) {
 251                         $val = $default;
 252                 }
 253                 if( is_null( $val ) ) {
 254                         return null;
 255                 } else {
 256                         return (string)$val;
 257                 }
 258         }
 259
 260         /**
 261          * Fetch an array from the input or return $default if it's not set.
 262          * If source was scalar, will return an array with a single element.
 263          * If no source and no default, returns NULL.
 264          *
 265          * @param $name string
 266          * @param $default array: optional default (or NULL)
 267          * @return array
 268          */
 269         function getArray( $name, $default = NULL ) {
 270                 $val = $this->getGPCVal( $this->data, $name, $default );
 271                 if( is_null( $val ) ) {
 272                         return null;
 273                 } else {
 274                         return (array)$val;
 275                 }
 276         }
 277
 278         /**
 279          * Fetch an array of integers, or return $default if it's not set.
 280          * If source was scalar, will return an array with a single element.
 281          * If no source and no default, returns NULL.
 282          * If an array is returned, contents are guaranteed to be integers.
 283          *
 284          * @param $name string
 285          * @param $default array: option default (or NULL)
 286          * @return array of ints
 287          */
 288         function getIntArray( $name, $default = NULL ) {
 289                 $val = $this->getArray( $name, $default );
 290                 if( is_array( $val ) ) {
 291                         $val = array_map( 'intval', $val );
 292                 }
 293                 return $val;
 294         }
 295
 296         /**
 297          * Fetch an integer value from the input or return $default if not set.
 298          * Guaranteed to return an integer; non-numeric input will typically
 299          * return 0.
 300          * @param $name string
 301          * @param $default int
 302          * @return int
 303          */
 304         function getInt( $name, $default = 0 ) {
 305                 return intval( $this->getVal( $name, $default ) );
 306         }
 307
 308         /**
 309          * Fetch an integer value from the input or return null if empty.
 310          * Guaranteed to return an integer or null; non-numeric input will
 311          * typically return null.
 312          * @param $name string
 313          * @return int
 314          */
 315         function getIntOrNull( $name ) {
 316                 $val = $this->getVal( $name );
 317                 return is_numeric( $val )
 318                         ? intval( $val )
 319                         : null;
 320         }
 321
 322         /**
 323          * Fetch a boolean value from the input or return $default if not set.
 324          * Guaranteed to return true or false, with normal PHP semantics for
 325          * boolean interpretation of strings.
 326          * @param $name string
 327          * @param $default bool
 328          * @return bool
 329          */
 330         function getBool( $name, $default = false ) {
 331                 return $this->getVal( $name, $default ) ? true : false;
 332         }
 333
 334         /**
 335          * Return true if the named value is set in the input, whatever that
 336          * value is (even "0"). Return false if the named value is not set.
 337          * Example use is checking for the presence of check boxes in forms.
 338          * @param $name string
 339          * @return bool
 340          */
 341         function getCheck( $name ) {
 342                 # Checkboxes and buttons are only present when clicked
 343                 # Presence connotes truth, abscense false
 344                 $val = $this->getVal( $name, NULL );
 345                 return isset( $val );
 346         }
 347
 348         /**
 349          * Fetch a text string from the given array or return $default if it's not
 350          * set. \r is stripped from the text, and with some language modules there
 351          * is an input transliteration applied. This should generally be used for
 352          * form <textarea> and <input> fields. Used for user-supplied freeform text
 353          * input (for which input transformations may be required - e.g. Esperanto
 354          * x-coding).
 355          *
 356          * @param $name string
 357          * @param $default string: optional
 358          * @return string
 359          */
 360         function getText( $name, $default = '' ) {
 361                 global $wgContLang;
 362                 $val = $this->getVal( $name, $default );
 363                 return str_replace( "\r\n", "\n",
 364                         $wgContLang->recodeInput( $val ) );
 365         }
 366
 367         /**
 368          * Extracts the given named values into an array.
 369          * If no arguments are given, returns all input values.
 370          * No transformation is performed on the values.
 371          */
 372         function getValues() {
 373                 $names = func_get_args();
 374                 if ( count( $names ) == 0 ) {
 375                         $names = array_keys( $this->data );
 376                 }
 377
 378                 $retVal = array();
 379                 foreach ( $names as $name ) {
 380                         $value = $this->getVal( $name );
 381                         if ( !is_null( $value ) ) {
 382                                 $retVal[$name] = $value;
 383                         }
 384                 }
 385                 return $retVal;
 386         }
 387
 388         /**
 389          * Returns true if the present request was reached by a POST operation,
 390          * false otherwise (GET, HEAD, or command-line).
 391          *
 392          * Note that values retrieved by the object may come from the
 393          * GET URL etc even on a POST request.
 394          *
 395          * @return bool
 396          */
 397         function wasPosted() {
 398                 return $_SERVER['REQUEST_METHOD'] == 'POST';
 399         }
 400
 401         /**
 402          * Returns true if there is a session cookie set.
 403          * This does not necessarily mean that the user is logged in!
 404          *
 405          * If you want to check for an open session, use session_id()
 406          * instead; that will also tell you if the session was opened
 407          * during the current request (in which case the cookie will
 408          * be sent back to the client at the end of the script run).
 409          *
 410          * @return bool
 411          */
 412         function checkSessionCookie() {
 413                 return isset( $_COOKIE[session_name()] );
 414         }
 415
 416         /**
 417          * Return the path portion of the request URI.
 418          * @return string
 419          */
 420         function getRequestURL() {
 421                 if( isset( $_SERVER['REQUEST_URI'] ) ) {
 422                         $base = $_SERVER['REQUEST_URI'];
 423                 } elseif( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 424                         // Probably IIS; doesn't set REQUEST_URI
 425                         $base = $_SERVER['SCRIPT_NAME'];
 426                         if( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 427                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 428                         }
 429                 } else {
 430                         // This shouldn't happen!
 431                         throw new MWException( "Web server doesn't provide either " .
 432                                 "REQUEST_URI or SCRIPT_NAME. Report details of your " .
 433                                 "web server configuration to http://bugzilla.wikimedia.org/" );
 434                 }
 435                 // User-agents should not send a fragment with the URI, but
 436                 // if they do, and the web server passes it on to us, we
 437                 // need to strip it or we get false-positive redirect loops
 438                 // or weird output URLs
 439                 $hash = strpos( $base, '#' );
 440                 if( $hash !== false ) {
 441                         $base = substr( $base, 0, $hash );
 442                 }
 443                 if( $base{0} == '/' ) {
 444                         return $base;
 445                 } else {
 446                         // We may get paths with a host prepended; strip it.
 447                         return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
 448                 }
 449         }
 450
 451         /**
 452          * Return the request URI with the canonical service and hostname.
 453          * @return string
 454          */
 455         function getFullRequestURL() {
 456                 global $wgServer;
 457                 return $wgServer . $this->getRequestURL();
 458         }
 459
 460         /**
 461          * Take an arbitrary query and rewrite the present URL to include it
 462          * @param $query String: query string fragment; do not include initial '?'
 463          * @return string
 464          */
 465         function appendQuery( $query ) {
 466                 global $wgTitle;
 467                 $basequery = '';
 468                 foreach( $_GET as $var => $val ) {
 469                         if ( $var == 'title' )
 470                                 continue;
 471                         if ( is_array( $val ) )
 472                                 /* This will happen given a request like
 473                                  * http://en.wikipedia.org/w/index.php?title[]=Special:Userlogin&returnto[]=Main_Page
 474                                  */
 475                                 continue;
 476                         $basequery .= '&' . urlencode( $var ) . '=' . urlencode( $val );
 477                 }
 478                 $basequery .= '&' . $query;
 479
 480                 # Trim the extra &
 481                 $basequery = substr( $basequery, 1 );
 482                 return $wgTitle->getLocalURL( $basequery );
 483         }
 484
 485         /**
 486          * HTML-safe version of appendQuery().
 487          * @param $query String: query string fragment; do not include initial '?'
 488          * @return string
 489          */
 490         function escapeAppendQuery( $query ) {
 491                 return htmlspecialchars( $this->appendQuery( $query ) );
 492         }
 493
 494         function appendQueryValue( $key, $value, $onlyquery = false ) {
 495                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 496         }
 497
 498         /**
 499          * Appends or replaces value of query variables.
 500          * @param $array Array of values to replace/add to query
 501          * @param $onlyquery Bool: whether to only return the query string and not
 502          *                   the complete URL
 503          * @return string
 504          */
 505         function appendQueryArray( $array, $onlyquery = false ) {
 506                 global $wgTitle;
 507                 $newquery = $_GET;
 508                 unset( $newquery['title'] );
 509                 $newquery = array_merge( $newquery, $array );
 510                 $query = wfArrayToCGI( $newquery );
 511                 return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
 512         }
 513
 514         /**
 515          * Check for limit and offset parameters on the input, and return sensible
 516          * defaults if not given. The limit must be positive and is capped at 5000.
 517          * Offset must be positive but is not capped.
 518          *
 519          * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
 520          * @param $optionname String: to specify an option other than rclimit to pull from.
 521          * @return array first element is limit, second is offset
 522          */
 523         function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 524                 global $wgUser;
 525
 526                 $limit = $this->getInt( 'limit', 0 );
 527                 if( $limit < 0 ) $limit = 0;
 528                 if( ( $limit == 0 ) && ( $optionname != '' ) ) {
 529                         $limit = (int)$wgUser->getOption( $optionname );
 530                 }
 531                 if( $limit <= 0 ) $limit = $deflimit;
 532                 if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 533
 534                 $offset = $this->getInt( 'offset', 0 );
 535                 if( $offset < 0 ) $offset = 0;
 536
 537                 return array( $limit, $offset );
 538         }
 539
 540         /**
 541          * Return the path to the temporary file where PHP has stored the upload.
 542          * @param $key String:
 543          * @return string or NULL if no such file.
 544          */
 545         function getFileTempname( $key ) {
 546                 if( !isset( $_FILES[$key] ) ) {
 547                         return NULL;
 548                 }
 549                 return $_FILES[$key]['tmp_name'];
 550         }
 551
 552         /**
 553          * Return the size of the upload, or 0.
 554          * @param $key String:
 555          * @return integer
 556          */
 557         function getFileSize( $key ) {
 558                 if( !isset( $_FILES[$key] ) ) {
 559                         return 0;
 560                 }
 561                 return $_FILES[$key]['size'];
 562         }
 563
 564         /**
 565          * Return the upload error or 0
 566          * @param $key String:
 567          * @return integer
 568          */
 569         function getUploadError( $key ) {
 570                 if( !isset( $_FILES[$key] ) || !isset( $_FILES[$key]['error'] ) ) {
 571                         return 0/*UPLOAD_ERR_OK*/;
 572                 }
 573                 return $_FILES[$key]['error'];
 574         }
 575
 576         /**
 577          * Return the original filename of the uploaded file, as reported by
 578          * the submitting user agent. HTML-style character entities are
 579          * interpreted and normalized to Unicode normalization form C, in part
 580          * to deal with weird input from Safari with non-ASCII filenames.
 581          *
 582          * Other than this the name is not verified for being a safe filename.
 583          *
 584          * @param $key String:
 585          * @return string or NULL if no such file.
 586          */
 587         function getFileName( $key ) {
 588                 if( !isset( $_FILES[$key] ) ) {
 589                         return NULL;
 590                 }
 591                 $name = $_FILES[$key]['name'];
 592
 593                 # Safari sends filenames in HTML-encoded Unicode form D...
 594                 # Horrid and evil! Let's try to make some kind of sense of it.
 595                 $name = Sanitizer::decodeCharReferences( $name );
 596                 $name = UtfNormal::cleanUp( $name );
 597                 wfDebug( "WebRequest::getFileName() '" . $_FILES[$key]['name'] . "' normalized to '$name'\n" );
 598                 return $name;
 599         }
 600
 601         /**
 602          * Return a handle to WebResponse style object, for setting cookies,
 603          * headers and other stuff, for Request being worked on.
 604          */
 605         function response() {
 606                 /* Lazy initialization of response object for this request */
 607                 if (!is_object($this->_response)) {
 608                         $this->_response = new WebResponse;
 609                 }
 610                 return $this->_response;
 611         }
 612
 613         /**
 614          * Get a request header, or false if it isn't set
 615          * @param $name String: case-insensitive header name
 616          */
 617         function getHeader( $name ) {
 618                 $name = strtoupper( $name );
 619                 if ( function_exists( 'apache_request_headers' ) ) {
 620                         if ( !isset( $this->headers ) ) {
 621                                 $this->headers = array();
 622                                 foreach ( apache_request_headers() as $tempName => $tempValue ) {
 623                                         $this->headers[ strtoupper( $tempName ) ] = $tempValue;
 624                                 }
 625                         }
 626                         if ( isset( $this->headers[$name] ) ) {
 627                                 return $this->headers[$name];
 628                         } else {
 629                                 return false;
 630                         }
 631                 } else {
 632                         $name = 'HTTP_' . str_replace( '-', '_', $name );
 633                         if ( isset( $_SERVER[$name] ) ) {
 634                                 return $_SERVER[$name];
 635                         } else {
 636                                 return false;
 637                         }
 638                 }
 639         }
 640
 641         /*
 642          * Get data from $_SESSION
 643          */
 644         function getSessionData( $key ) {
 645                 if( !isset( $_SESSION[$key] ) )
 646                         return null;
 647                 return $_SESSION[$key];
 648         }
 649         function setSessionData( $key, $data ) {
 650                 $_SESSION[$key] = $data;
 651         }
 652 }
 653
 654 /**
 655  * WebRequest clone which takes values from a provided array.
 656  *
 657  * @ingroup HTTP
 658  */
 659 class FauxRequest extends WebRequest {
 660         var $wasPosted = false;
 661
 662         /**
 663          * @param $data Array of *non*-urlencoded key => value pairs, the
 664          *   fake GET/POST values
 665          * @param $wasPosted Bool: whether to treat the data as POST
 666          */
 667         function FauxRequest( $data, $wasPosted = false, $session = null ) {
 668                 if( is_array( $data ) ) {
 669                         $this->data = $data;
 670                 } else {
 671                         throw new MWException( "FauxRequest() got bogus data" );
 672                 }
 673                 $this->wasPosted = $wasPosted;
 674                 $this->headers = array();
 675                 $this->session = $session ? $session : array();
 676         }
 677
 678         function notImplemented( $method ) {
 679                 throw new MWException( "{$method}() not implemented" );
 680         }
 681
 682         function getText( $name, $default = '' ) {
 683                 # Override; don't recode since we're using internal data
 684                 return (string)$this->getVal( $name, $default );
 685         }
 686
 687         function getValues() {
 688                 return $this->data;
 689         }
 690
 691         function wasPosted() {
 692                 return $this->wasPosted;
 693         }
 694
 695         function checkSessionCookie() {
 696                 return false;
 697         }
 698
 699         function getRequestURL() {
 700                 $this->notImplemented( __METHOD__ );
 701         }
 702
 703         function appendQuery( $query ) {
 704                 $this->notImplemented( __METHOD__ );
 705         }
 706
 707         function getHeader( $name ) {
 708                 return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
 709         }
 710
 711         function getSessionData( $key ) {
 712                 if( !isset( $this->session[$key] ) )
 713                         return null;
 714                 return $this->session[$key];
 715         }
 716         function setSessionData( $key, $data ) {
 717                 $this->notImplemented( __METHOD__ );
 718         }
 719
 720 }