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         protected $data, $headers = array();
  47         private $_response;
  48
  49         public function __construct() {
  50                 /// @todo Fixme: this preemptive de-quoting can interfere with other web libraries
  51                 ///        and increases our memory footprint. It would be cleaner to do on
  52                 ///        demand; but currently we have no wrapper for $_SERVER etc.
  53                 $this->checkMagicQuotes();
  54
  55                 // POST overrides GET data
  56                 // We don't use $_REQUEST here to avoid interference from cookies...
  57                 $this->data = $_POST + $_GET;
  58         }
  59
  60         /**
  61          * Check for title, action, and/or variant data in the URL
  62          * and interpolate it into the GET variables.
  63          * This should only be run after $wgContLang is available,
  64          * as we may need the list of language variants to determine
  65          * available variant URLs.
  66          */
  67         public function interpolateTitle() {
  68                 global $wgUsePathInfo;
  69
  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
  76                         if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
  77                                 // Slurp out the path portion to examine...
  78                                 $url = $_SERVER['REQUEST_URI'];
  79                                 if ( !preg_match( '!^https?://!', $url ) ) {
  80                                         $url = 'http://unused' . $url;
  81                                 }
  82                                 $a = parse_url( $url );
  83                                 if( $a ) {
  84                                         $path = isset( $a['path'] ) ? $a['path'] : '';
  85
  86                                         global $wgScript;
  87                                         if( $path == $wgScript ) {
  88                                                 // Script inside a rewrite path?
  89                                                 // Abort to keep from breaking...
  90                                                 return;
  91                                         }
  92                                         // Raw PATH_INFO style
  93                                         $matches = $this->extractTitle( $path, "$wgScript/$1" );
  94
  95                                         global $wgArticlePath;
  96                                         if( !$matches && $wgArticlePath ) {
  97                                                 $matches = $this->extractTitle( $path, $wgArticlePath );
  98                                         }
  99
 100                                         global $wgActionPaths;
 101                                         if( !$matches && $wgActionPaths ) {
 102                                                 $matches = $this->extractTitle( $path, $wgActionPaths, 'action' );
 103                                         }
 104
 105                                         global $wgVariantArticlePath, $wgContLang;
 106                                         if( !$matches && $wgVariantArticlePath ) {
 107                                                 $variantPaths = array();
 108                                                 foreach( $wgContLang->getVariants() as $variant ) {
 109                                                         $variantPaths[$variant] =
 110                                                                 str_replace( '$2', $variant, $wgVariantArticlePath );
 111                                                 }
 112                                                 $matches = $this->extractTitle( $path, $variantPaths, 'variant' );
 113                                         }
 114                                 }
 115                         } elseif ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
 116                                 // Mangled PATH_INFO
 117                                 // http://bugs.php.net/bug.php?id=31892
 118                                 // Also reported when ini_get('cgi.fix_pathinfo')==false
 119                                 $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );
 120
 121                         } elseif ( isset( $_SERVER['PATH_INFO'] ) && ($_SERVER['PATH_INFO'] != '') ) {
 122                                 // Regular old PATH_INFO yay
 123                                 $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
 124                         }
 125                         foreach( $matches as $key => $val) {
 126                                 $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
 127                         }
 128                 }
 129         }
 130
 131         /**
 132          * Internal URL rewriting function; tries to extract page title and,
 133          * optionally, one other fixed parameter value from a URL path.
 134          *
 135          * @param $path string: the URL path given from the client
 136          * @param $bases array: one or more URLs, optionally with $1 at the end
 137          * @param $key string: if provided, the matching key in $bases will be
 138          *             passed on as the value of this URL parameter
 139          * @return array of URL variables to interpolate; empty if no match
 140          */
 141         private function extractTitle( $path, $bases, $key=false ) {
 142                 foreach( (array)$bases as $keyValue => $base ) {
 143                         // Find the part after $wgArticlePath
 144                         $base = str_replace( '$1', '', $base );
 145                         $baseLen = strlen( $base );
 146                         if( substr( $path, 0, $baseLen ) == $base ) {
 147                                 $raw = substr( $path, $baseLen );
 148                                 if( $raw !== '' ) {
 149                                         $matches = array( 'title' => rawurldecode( $raw ) );
 150                                         if( $key ) {
 151                                                 $matches[$key] = $keyValue;
 152                                         }
 153                                         return $matches;
 154                                 }
 155                         }
 156                 }
 157                 return array();
 158         }
 159
 160         /**
 161          * Recursively strips slashes from the given array;
 162          * used for undoing the evil that is magic_quotes_gpc.
 163          * @param $arr array: will be modified
 164          * @return array the original array
 165          */
 166         private function &fix_magic_quotes( &$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          */
 183         private function checkMagicQuotes() {
 184                 $mustFixQuotes = function_exists( 'get_magic_quotes_gpc' )
 185                         && get_magic_quotes_gpc();
 186                 if( $mustFixQuotes ) {
 187                         $this->fix_magic_quotes( $_COOKIE );
 188                         $this->fix_magic_quotes( $_ENV );
 189                         $this->fix_magic_quotes( $_GET );
 190                         $this->fix_magic_quotes( $_POST );
 191                         $this->fix_magic_quotes( $_REQUEST );
 192                         $this->fix_magic_quotes( $_SERVER );
 193                 }
 194         }
 195
 196         /**
 197          * Recursively normalizes UTF-8 strings in the given array.
 198          * @param $data string or array
 199          * @return cleaned-up version of the given
 200          * @private
 201          */
 202         function normalizeUnicode( $data ) {
 203                 if( is_array( $data ) ) {
 204                         foreach( $data as $key => $val ) {
 205                                 $data[$key] = $this->normalizeUnicode( $val );
 206                         }
 207                 } else {
 208                         global $wgContLang;
 209                         $data = $wgContLang->normalize( $data );
 210                 }
 211                 return $data;
 212         }
 213
 214         /**
 215          * Fetch a value from the given array or return $default if it's not set.
 216          *
 217          * @param $arr array
 218          * @param $name string
 219          * @param $default mixed
 220          * @return mixed
 221          */
 222         private function getGPCVal( $arr, $name, $default ) {
 223                 # PHP is so nice to not touch input data, except sometimes:
 224                 # http://us2.php.net/variables.external#language.variables.external.dot-in-names
 225                 # Work around PHP *feature* to avoid *bugs* elsewhere.
 226                 $name = strtr( $name, '.', '_' );
 227                 if( isset( $arr[$name] ) ) {
 228                         global $wgContLang;
 229                         $data = $arr[$name];
 230                         if( isset( $_GET[$name] ) && !is_array( $data ) ) {
 231                                 # Check for alternate/legacy character encoding.
 232                                 if( isset( $wgContLang ) ) {
 233                                         $data = $wgContLang->checkTitleEncoding( $data );
 234                                 }
 235                         }
 236                         $data = $this->normalizeUnicode( $data );
 237                         return $data;
 238                 } else {
 239                         taint( $default );
 240                         return $default;
 241                 }
 242         }
 243
 244         /**
 245          * Fetch a scalar from the input or return $default if it's not set.
 246          * Returns a string. Arrays are discarded. Useful for
 247          * non-freeform text inputs (e.g. predefined internal text keys
 248          * selected by a drop-down menu). For freeform input, see getText().
 249          *
 250          * @param $name string
 251          * @param $default string: optional default (or NULL)
 252          * @return string
 253          */
 254         public function getVal( $name, $default = null ) {
 255                 $val = $this->getGPCVal( $this->data, $name, $default );
 256                 if( is_array( $val ) ) {
 257                         $val = $default;
 258                 }
 259                 if( is_null( $val ) ) {
 260                         return $val;
 261                 } else {
 262                         return (string)$val;
 263                 }
 264         }
 265
 266         /**
 267          * Set an aribtrary value into our get/post data.
 268          * @param $key string Key name to use
 269          * @param $value mixed Value to set
 270          * @return mixed old value if one was present, null otherwise
 271          */
 272         public function setVal( $key, $value ) {
 273                 $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
 274                 $this->data[$key] = $value;
 275                 return $ret;
 276         }
 277
 278         /**
 279          * Fetch an array from the input 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          *
 283          * @param $name string
 284          * @param $default array: optional default (or NULL)
 285          * @return array
 286          */
 287         public function getArray( $name, $default = null ) {
 288                 $val = $this->getGPCVal( $this->data, $name, $default );
 289                 if( is_null( $val ) ) {
 290                         return null;
 291                 } else {
 292                         return (array)$val;
 293                 }
 294         }
 295
 296         /**
 297          * Fetch an array of integers, or return $default if it's not set.
 298          * If source was scalar, will return an array with a single element.
 299          * If no source and no default, returns NULL.
 300          * If an array is returned, contents are guaranteed to be integers.
 301          *
 302          * @param $name string
 303          * @param $default array: option default (or NULL)
 304          * @return array of ints
 305          */
 306         public function getIntArray( $name, $default = null ) {
 307                 $val = $this->getArray( $name, $default );
 308                 if( is_array( $val ) ) {
 309                         $val = array_map( 'intval', $val );
 310                 }
 311                 return $val;
 312         }
 313
 314         /**
 315          * Fetch an integer value from the input or return $default if not set.
 316          * Guaranteed to return an integer; non-numeric input will typically
 317          * return 0.
 318          * @param $name string
 319          * @param $default int
 320          * @return int
 321          */
 322         public function getInt( $name, $default = 0 ) {
 323                 return intval( $this->getVal( $name, $default ) );
 324         }
 325
 326         /**
 327          * Fetch an integer value from the input or return null if empty.
 328          * Guaranteed to return an integer or null; non-numeric input will
 329          * typically return null.
 330          * @param $name string
 331          * @return int
 332          */
 333         public function getIntOrNull( $name ) {
 334                 $val = $this->getVal( $name );
 335                 return is_numeric( $val )
 336                         ? intval( $val )
 337                         : null;
 338         }
 339
 340         /**
 341          * Fetch a boolean value from the input or return $default if not set.
 342          * Guaranteed to return true or false, with normal PHP semantics for
 343          * boolean interpretation of strings.
 344          * @param $name string
 345          * @param $default bool
 346          * @return bool
 347          */
 348         public function getBool( $name, $default = false ) {
 349                 return $this->getVal( $name, $default ) ? true : false;
 350         }
 351
 352         /**
 353          * Return true if the named value is set in the input, whatever that
 354          * value is (even "0"). Return false if the named value is not set.
 355          * Example use is checking for the presence of check boxes in forms.
 356          * @param $name string
 357          * @return bool
 358          */
 359         public function getCheck( $name ) {
 360                 # Checkboxes and buttons are only present when clicked
 361                 # Presence connotes truth, abscense false
 362                 $val = $this->getVal( $name, null );
 363                 return isset( $val );
 364         }
 365
 366         /**
 367          * Fetch a text string from the given array or return $default if it's not
 368          * set. \r is stripped from the text, and with some language modules there
 369          * is an input transliteration applied. This should generally be used for
 370          * form <textarea> and <input> fields. Used for user-supplied freeform text
 371          * input (for which input transformations may be required - e.g. Esperanto
 372          * x-coding).
 373          *
 374          * @param $name string
 375          * @param $default string: optional
 376          * @return string
 377          */
 378         public function getText( $name, $default = '' ) {
 379                 global $wgContLang;
 380                 $val = $this->getVal( $name, $default );
 381                 return str_replace( "\r\n", "\n",
 382                         $wgContLang->recodeInput( $val ) );
 383         }
 384
 385         /**
 386          * Extracts the given named values into an array.
 387          * If no arguments are given, returns all input values.
 388          * No transformation is performed on the values.
 389          */
 390         public function getValues() {
 391                 $names = func_get_args();
 392                 if ( count( $names ) == 0 ) {
 393                         $names = array_keys( $this->data );
 394                 }
 395
 396                 $retVal = array();
 397                 foreach ( $names as $name ) {
 398                         $value = $this->getVal( $name );
 399                         if ( !is_null( $value ) ) {
 400                                 $retVal[$name] = $value;
 401                         }
 402                 }
 403                 return $retVal;
 404         }
 405
 406         /**
 407          * Returns true if the present request was reached by a POST operation,
 408          * false otherwise (GET, HEAD, or command-line).
 409          *
 410          * Note that values retrieved by the object may come from the
 411          * GET URL etc even on a POST request.
 412          *
 413          * @return bool
 414          */
 415         public function wasPosted() {
 416                 return $_SERVER['REQUEST_METHOD'] == 'POST';
 417         }
 418
 419         /**
 420          * Returns true if there is a session cookie set.
 421          * This does not necessarily mean that the user is logged in!
 422          *
 423          * If you want to check for an open session, use session_id()
 424          * instead; that will also tell you if the session was opened
 425          * during the current request (in which case the cookie will
 426          * be sent back to the client at the end of the script run).
 427          *
 428          * @return bool
 429          */
 430         public function checkSessionCookie() {
 431                 return isset( $_COOKIE[session_name()] );
 432         }
 433
 434         /**
 435          * Get a cookie from the $_COOKIE jar
 436          * @param String $key The name of the cookie
 437          * @param mixed $default What to return if the value isn't found
 438          * @param String $prefix A prefix to use for the cookie name, if not $wgCookiePrefix
 439          * @return <type>
 440          */
 441         public function getCookie( $key, $default = null, $prefix = '' ) {
 442                 if( !$prefix ) {
 443                         global $wgCookiePrefix;
 444                         $prefix = $wgCookiePrefix;
 445                 }
 446                 return $this->getGPCVal( $_COOKIE, $prefix . $key , $default );
 447         }
 448
 449         /**
 450          * Return the path portion of the request URI.
 451          * @return string
 452          */
 453         public function getRequestURL() {
 454                 if( isset( $_SERVER['REQUEST_URI'] ) ) {
 455                         $base = $_SERVER['REQUEST_URI'];
 456                 } elseif( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 457                         // Probably IIS; doesn't set REQUEST_URI
 458                         $base = $_SERVER['SCRIPT_NAME'];
 459                         if( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 460                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 461                         }
 462                 } else {
 463                         // This shouldn't happen!
 464                         throw new MWException( "Web server doesn't provide either " .
 465                                 "REQUEST_URI or SCRIPT_NAME. Report details of your " .
 466                                 "web server configuration to http://bugzilla.wikimedia.org/" );
 467                 }
 468                 // User-agents should not send a fragment with the URI, but
 469                 // if they do, and the web server passes it on to us, we
 470                 // need to strip it or we get false-positive redirect loops
 471                 // or weird output URLs
 472                 $hash = strpos( $base, '#' );
 473                 if( $hash !== false ) {
 474                         $base = substr( $base, 0, $hash );
 475                 }
 476                 if( $base{0} == '/' ) {
 477                         return $base;
 478                 } else {
 479                         // We may get paths with a host prepended; strip it.
 480                         return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
 481                 }
 482         }
 483
 484         /**
 485          * Return the request URI with the canonical service and hostname.
 486          * @return string
 487          */
 488         public function getFullRequestURL() {
 489                 global $wgServer;
 490                 return $wgServer . $this->getRequestURL();
 491         }
 492
 493         /**
 494          * Take an arbitrary query and rewrite the present URL to include it
 495          * @param $query String: query string fragment; do not include initial '?'
 496          * @return string
 497          */
 498         public function appendQuery( $query ) {
 499                 global $wgTitle;
 500                 $basequery = '';
 501                 foreach( $_GET as $var => $val ) {
 502                         if ( $var == 'title' )
 503                                 continue;
 504                         if ( is_array( $val ) )
 505                                 /* This will happen given a request like
 506                                  * http://en.wikipedia.org/w/index.php?title[]=Special:Userlogin&returnto[]=Main_Page
 507                                  */
 508                                 continue;
 509                         $basequery .= '&' . urlencode( $var ) . '=' . urlencode( $val );
 510                 }
 511                 $basequery .= '&' . $query;
 512
 513                 # Trim the extra &
 514                 $basequery = substr( $basequery, 1 );
 515                 return $wgTitle->getLocalURL( $basequery );
 516         }
 517
 518         /**
 519          * HTML-safe version of appendQuery().
 520          * @param $query String: query string fragment; do not include initial '?'
 521          * @return string
 522          */
 523         public function escapeAppendQuery( $query ) {
 524                 return htmlspecialchars( $this->appendQuery( $query ) );
 525         }
 526
 527         public function appendQueryValue( $key, $value, $onlyquery = false ) {
 528                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 529         }
 530
 531         /**
 532          * Appends or replaces value of query variables.
 533          * @param $array Array of values to replace/add to query
 534          * @param $onlyquery Bool: whether to only return the query string and not
 535          *                   the complete URL
 536          * @return string
 537          */
 538         public function appendQueryArray( $array, $onlyquery = false ) {
 539                 global $wgTitle;
 540                 $newquery = $_GET;
 541                 unset( $newquery['title'] );
 542                 $newquery = array_merge( $newquery, $array );
 543                 $query = wfArrayToCGI( $newquery );
 544                 return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
 545         }
 546
 547         /**
 548          * Check for limit and offset parameters on the input, and return sensible
 549          * defaults if not given. The limit must be positive and is capped at 5000.
 550          * Offset must be positive but is not capped.
 551          *
 552          * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
 553          * @param $optionname String: to specify an option other than rclimit to pull from.
 554          * @return array first element is limit, second is offset
 555          */
 556         public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 557                 global $wgUser;
 558
 559                 $limit = $this->getInt( 'limit', 0 );
 560                 if( $limit < 0 ) $limit = 0;
 561                 if( ( $limit == 0 ) && ( $optionname != '' ) ) {
 562                         $limit = (int)$wgUser->getOption( $optionname );
 563                 }
 564                 if( $limit <= 0 ) $limit = $deflimit;
 565                 if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 566
 567                 $offset = $this->getInt( 'offset', 0 );
 568                 if( $offset < 0 ) $offset = 0;
 569
 570                 return array( $limit, $offset );
 571         }
 572
 573         /**
 574          * Return the path to the temporary file where PHP has stored the upload.
 575          * @param $key String:
 576          * @return string or NULL if no such file.
 577          */
 578         public function getFileTempname( $key ) {
 579                 if( !isset( $_FILES[$key] ) ) {
 580                         return null;
 581                 }
 582                 return $_FILES[$key]['tmp_name'];
 583         }
 584
 585         /**
 586          * Return the size of the upload, or 0.
 587          * @param $key String:
 588          * @return integer
 589          */
 590         public function getFileSize( $key ) {
 591                 if( !isset( $_FILES[$key] ) ) {
 592                         return 0;
 593                 }
 594                 return $_FILES[$key]['size'];
 595         }
 596
 597         /**
 598          * Return the upload error or 0
 599          * @param $key String:
 600          * @return integer
 601          */
 602         public function getUploadError( $key ) {
 603                 if( !isset( $_FILES[$key] ) || !isset( $_FILES[$key]['error'] ) ) {
 604                         return 0/*UPLOAD_ERR_OK*/;
 605                 }
 606                 return $_FILES[$key]['error'];
 607         }
 608
 609         /**
 610          * Return the original filename of the uploaded file, as reported by
 611          * the submitting user agent. HTML-style character entities are
 612          * interpreted and normalized to Unicode normalization form C, in part
 613          * to deal with weird input from Safari with non-ASCII filenames.
 614          *
 615          * Other than this the name is not verified for being a safe filename.
 616          *
 617          * @param $key String:
 618          * @return string or NULL if no such file.
 619          */
 620         public function getFileName( $key ) {
 621                 global $wgContLang;
 622                 if( !isset( $_FILES[$key] ) ) {
 623                         return null;
 624                 }
 625                 $name = $_FILES[$key]['name'];
 626
 627                 # Safari sends filenames in HTML-encoded Unicode form D...
 628                 # Horrid and evil! Let's try to make some kind of sense of it.
 629                 $name = Sanitizer::decodeCharReferences( $name );
 630                 $name = $wgContLang->normalize( $name );
 631                 wfDebug( "WebRequest::getFileName() '" . $_FILES[$key]['name'] . "' normalized to '$name'\n" );
 632                 return $name;
 633         }
 634
 635         /**
 636          * Return a handle to WebResponse style object, for setting cookies,
 637          * headers and other stuff, for Request being worked on.
 638          */
 639         public function response() {
 640                 /* Lazy initialization of response object for this request */
 641                 if ( !is_object( $this->_response ) ) {
 642                         $class = ( $this instanceof FauxRequest ) ? 'FauxResponse' : 'WebResponse';
 643                         $this->_response = new $class();
 644                 }
 645                 return $this->_response;
 646         }
 647
 648         /**
 649          * Get a request header, or false if it isn't set
 650          * @param $name String: case-insensitive header name
 651          */
 652         public function getHeader( $name ) {
 653                 $name = strtoupper( $name );
 654                 if ( function_exists( 'apache_request_headers' ) ) {
 655                         if ( !$this->headers ) {
 656                                 foreach ( apache_request_headers() as $tempName => $tempValue ) {
 657                                         $this->headers[ strtoupper( $tempName ) ] = $tempValue;
 658                                 }
 659                         }
 660                         if ( isset( $this->headers[$name] ) ) {
 661                                 return $this->headers[$name];
 662                         } else {
 663                                 return false;
 664                         }
 665                 } else {
 666                         $name = 'HTTP_' . str_replace( '-', '_', $name );
 667                         if ( isset( $_SERVER[$name] ) ) {
 668                                 return $_SERVER[$name];
 669                         } else {
 670                                 return false;
 671                         }
 672                 }
 673         }
 674
 675         /*
 676          * Get data from $_SESSION
 677          * @param $key String Name of key in $_SESSION
 678          * @return mixed
 679          */
 680         public function getSessionData( $key ) {
 681                 if( !isset( $_SESSION[$key] ) )
 682                         return null;
 683                 return $_SESSION[$key];
 684         }
 685
 686         /**
 687          * Set session data
 688          * @param $key String Name of key in $_SESSION
 689          * @param $data mixed
 690          */
 691         public function setSessionData( $key, $data ) {
 692                 $_SESSION[$key] = $data;
 693         }
 694
 695         /**
 696          * Returns true if the PATH_INFO ends with an extension other than a script
 697          * extension. This could confuse IE for scripts that send arbitrary data which
 698          * is not HTML but may be detected as such.
 699          *
 700          * Various past attempts to use the URL to make this check have generally
 701          * run up against the fact that CGI does not provide a standard method to
 702          * determine the URL. PATH_INFO may be mangled (e.g. if cgi.fix_pathinfo=0),
 703          * but only by prefixing it with the script name and maybe some other stuff,
 704          * the extension is not mangled. So this should be a reasonably portable
 705          * way to perform this security check.
 706          */
 707         public function isPathInfoBad() {
 708                 global $wgScriptExtension;
 709
 710                 if ( !isset( $_SERVER['PATH_INFO'] ) ) {
 711                         return false;
 712                 }
 713                 $pi = $_SERVER['PATH_INFO'];
 714                 $dotPos = strrpos( $pi, '.' );
 715                 if ( $dotPos === false ) {
 716                         return false;
 717                 }
 718                 $ext = substr( $pi, $dotPos );
 719                 return !in_array( $ext, array( $wgScriptExtension, '.php', '.php5' ) );
 720         }
 721 }
 722
 723 /**
 724  * WebRequest clone which takes values from a provided array.
 725  *
 726  * @ingroup HTTP
 727  */
 728 class FauxRequest extends WebRequest {
 729         private $wasPosted = false;
 730         private $session = array();
 731         private $response;
 732
 733         /**
 734          * @param $data Array of *non*-urlencoded key => value pairs, the
 735          *   fake GET/POST values
 736          * @param $wasPosted Bool: whether to treat the data as POST
 737          */
 738         public function __construct( $data, $wasPosted = false, $session = null ) {
 739                 if( is_array( $data ) ) {
 740                         $this->data = $data;
 741                 } else {
 742                         throw new MWException( "FauxRequest() got bogus data" );
 743                 }
 744                 $this->wasPosted = $wasPosted;
 745                 if( $session )
 746                         $this->session = $session;
 747         }
 748
 749         private function notImplemented( $method ) {
 750                 throw new MWException( "{$method}() not implemented" );
 751         }
 752
 753         public function getText( $name, $default = '' ) {
 754                 # Override; don't recode since we're using internal data
 755                 return (string)$this->getVal( $name, $default );
 756         }
 757
 758         public function getValues() {
 759                 return $this->data;
 760         }
 761
 762         public function wasPosted() {
 763                 return $this->wasPosted;
 764         }
 765
 766         public function checkSessionCookie() {
 767                 return false;
 768         }
 769
 770         public function getRequestURL() {
 771                 $this->notImplemented( __METHOD__ );
 772         }
 773
 774         public function appendQuery( $query ) {
 775                 $this->notImplemented( __METHOD__ );
 776         }
 777
 778         public function getHeader( $name ) {
 779                 return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
 780         }
 781
 782         public function setHeader( $name, $val ) {
 783                 $this->headers[$name] = $val;
 784         }
 785
 786         public function getSessionData( $key ) {
 787                 if( isset( $this->session[$key] ) )
 788                         return $this->session[$key];
 789         }
 790
 791         public function setSessionData( $key, $data ) {
 792                 $this->session[$key] = $data;
 793         }
 794
 795         public function isPathInfoBad() {
 796                 return false;
 797         }
 798 }