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                 if ( $wgUsePathInfo ) {
  70                         // PATH_INFO is mangled due to http://bugs.php.net/bug.php?id=31892
  71                         // And also by Apache 2.x, double slashes are converted to single slashes.
  72                         // So we will use REQUEST_URI if possible.
  73                         $matches = array();
  74                         if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
  75                                 // Slurp out the path portion to examine...
  76                                 $url = $_SERVER['REQUEST_URI'];
  77                                 if ( !preg_match( '!^https?://!', $url ) ) {
  78                                         $url = 'http://unused' . $url;
  79                                 }
  80                                 $a = parse_url( $url );
  81                                 if( $a ) {
  82                                         $path = isset( $a['path'] ) ? $a['path'] : '';
  83
  84                                         global $wgScript;
  85                                         if( $path == $wgScript ) {
  86                                                 // Script inside a rewrite path?
  87                                                 // Abort to keep from breaking...
  88                                                 return;
  89                                         }
  90                                         // Raw PATH_INFO style
  91                                         $matches = $this->extractTitle( $path, "$wgScript/$1" );
  92
  93                                         global $wgArticlePath;
  94                                         if( !$matches && $wgArticlePath ) {
  95                                                 $matches = $this->extractTitle( $path, $wgArticlePath );
  96                                         }
  97
  98                                         global $wgActionPaths;
  99                                         if( !$matches && $wgActionPaths ) {
 100                                                 $matches = $this->extractTitle( $path, $wgActionPaths, 'action' );
 101                                         }
 102
 103                                         global $wgVariantArticlePath, $wgContLang;
 104                                         if( !$matches && $wgVariantArticlePath ) {
 105                                                 $variantPaths = array();
 106                                                 foreach( $wgContLang->getVariants() as $variant ) {
 107                                                         $variantPaths[$variant] =
 108                                                                 str_replace( '$2', $variant, $wgVariantArticlePath );
 109                                                 }
 110                                                 $matches = $this->extractTitle( $path, $variantPaths, 'variant' );
 111                                         }
 112                                 }
 113                         } elseif ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
 114                                 // Mangled PATH_INFO
 115                                 // http://bugs.php.net/bug.php?id=31892
 116                                 // Also reported when ini_get('cgi.fix_pathinfo')==false
 117                                 $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );
 118
 119                         } elseif ( isset( $_SERVER['PATH_INFO'] ) && ($_SERVER['PATH_INFO'] != '') ) {
 120                                 // Regular old PATH_INFO yay
 121                                 $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
 122                         }
 123                         foreach( $matches as $key => $val) {
 124                                 $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
 125                         }
 126                 }
 127         }
 128
 129         /**
 130          * Internal URL rewriting function; tries to extract page title and,
 131          * optionally, one other fixed parameter value from a URL path.
 132          *
 133          * @param $path string: the URL path given from the client
 134          * @param $bases array: one or more URLs, optionally with $1 at the end
 135          * @param $key string: if provided, the matching key in $bases will be
 136          *             passed on as the value of this URL parameter
 137          * @return array of URL variables to interpolate; empty if no match
 138          */
 139         private function extractTitle( $path, $bases, $key=false ) {
 140                 foreach( (array)$bases as $keyValue => $base ) {
 141                         // Find the part after $wgArticlePath
 142                         $base = str_replace( '$1', '', $base );
 143                         $baseLen = strlen( $base );
 144                         if( substr( $path, 0, $baseLen ) == $base ) {
 145                                 $raw = substr( $path, $baseLen );
 146                                 if( $raw !== '' ) {
 147                                         $matches = array( 'title' => rawurldecode( $raw ) );
 148                                         if( $key ) {
 149                                                 $matches[$key] = $keyValue;
 150                                         }
 151                                         return $matches;
 152                                 }
 153                         }
 154                 }
 155                 return array();
 156         }
 157
 158         /**
 159          * Recursively strips slashes from the given array;
 160          * used for undoing the evil that is magic_quotes_gpc.
 161          * @param $arr array: will be modified
 162          * @return array the original array
 163          */
 164         private function &fix_magic_quotes( &$arr ) {
 165                 foreach( $arr as $key => $val ) {
 166                         if( is_array( $val ) ) {
 167                                 $this->fix_magic_quotes( $arr[$key] );
 168                         } else {
 169                                 $arr[$key] = stripslashes( $val );
 170                         }
 171                 }
 172                 return $arr;
 173         }
 174
 175         /**
 176          * If magic_quotes_gpc option is on, run the global arrays
 177          * through fix_magic_quotes to strip out the stupid slashes.
 178          * WARNING: This should only be done once! Running a second
 179          * time could damage the values.
 180          */
 181         private function checkMagicQuotes() {
 182                 $mustFixQuotes = function_exists( 'get_magic_quotes_gpc' )
 183                         && get_magic_quotes_gpc();
 184                 if( $mustFixQuotes ) {
 185                         $this->fix_magic_quotes( $_COOKIE );
 186                         $this->fix_magic_quotes( $_ENV );
 187                         $this->fix_magic_quotes( $_GET );
 188                         $this->fix_magic_quotes( $_POST );
 189                         $this->fix_magic_quotes( $_REQUEST );
 190                         $this->fix_magic_quotes( $_SERVER );
 191                 }
 192         }
 193
 194         /**
 195          * Recursively normalizes UTF-8 strings in the given array.
 196          * @param $data string or array
 197          * @return cleaned-up version of the given
 198          * @private
 199          */
 200         function normalizeUnicode( $data ) {
 201                 if( is_array( $data ) ) {
 202                         foreach( $data as $key => $val ) {
 203                                 $data[$key] = $this->normalizeUnicode( $val );
 204                         }
 205                 } else {
 206                         global $wgContLang;
 207                         $data = $wgContLang->normalize( $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          */
 220         private function getGPCVal( $arr, $name, $default ) {
 221                 # PHP is so nice to not touch input data, except sometimes:
 222                 # http://us2.php.net/variables.external#language.variables.external.dot-in-names
 223                 # Work around PHP *feature* to avoid *bugs* elsewhere.
 224                 $name = strtr( $name, '.', '_' );
 225                 if( isset( $arr[$name] ) ) {
 226                         global $wgContLang;
 227                         $data = $arr[$name];
 228                         if( isset( $_GET[$name] ) && !is_array( $data ) ) {
 229                                 # Check for alternate/legacy character encoding.
 230                                 if( isset( $wgContLang ) ) {
 231                                         $data = $wgContLang->checkTitleEncoding( $data );
 232                                 }
 233                         }
 234                         $data = $this->normalizeUnicode( $data );
 235                         return $data;
 236                 } else {
 237                         taint( $default );
 238                         return $default;
 239                 }
 240         }
 241
 242         /**
 243          * Fetch a scalar from the input or return $default if it's not set.
 244          * Returns a string. Arrays are discarded. Useful for
 245          * non-freeform text inputs (e.g. predefined internal text keys
 246          * selected by a drop-down menu). For freeform input, see getText().
 247          *
 248          * @param $name string
 249          * @param $default string: optional default (or NULL)
 250          * @return string
 251          */
 252         public function getVal( $name, $default = null ) {
 253                 $val = $this->getGPCVal( $this->data, $name, $default );
 254                 if( is_array( $val ) ) {
 255                         $val = $default;
 256                 }
 257                 if( is_null( $val ) ) {
 258                         return $val;
 259                 } else {
 260                         return (string)$val;
 261                 }
 262         }
 263
 264         /**
 265          * Set an aribtrary value into our get/post data.
 266          * @param $key string Key name to use
 267          * @param $value mixed Value to set
 268          * @return mixed old value if one was present, null otherwise
 269          */
 270         public function setVal( $key, $value ) {
 271                 $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
 272                 $this->data[$key] = $value;
 273                 return $ret;
 274         }
 275
 276         /**
 277          * Fetch an array from the input or return $default if it's not set.
 278          * If source was scalar, will return an array with a single element.
 279          * If no source and no default, returns NULL.
 280          *
 281          * @param $name string
 282          * @param $default array: optional default (or NULL)
 283          * @return array
 284          */
 285         public function getArray( $name, $default = null ) {
 286                 $val = $this->getGPCVal( $this->data, $name, $default );
 287                 if( is_null( $val ) ) {
 288                         return null;
 289                 } else {
 290                         return (array)$val;
 291                 }
 292         }
 293
 294         /**
 295          * Fetch an array of integers, or return $default if it's not set.
 296          * If source was scalar, will return an array with a single element.
 297          * If no source and no default, returns NULL.
 298          * If an array is returned, contents are guaranteed to be integers.
 299          *
 300          * @param $name string
 301          * @param $default array: option default (or NULL)
 302          * @return array of ints
 303          */
 304         public function getIntArray( $name, $default = null ) {
 305                 $val = $this->getArray( $name, $default );
 306                 if( is_array( $val ) ) {
 307                         $val = array_map( 'intval', $val );
 308                 }
 309                 return $val;
 310         }
 311
 312         /**
 313          * Fetch an integer value from the input or return $default if not set.
 314          * Guaranteed to return an integer; non-numeric input will typically
 315          * return 0.
 316          * @param $name string
 317          * @param $default int
 318          * @return int
 319          */
 320         public function getInt( $name, $default = 0 ) {
 321                 return intval( $this->getVal( $name, $default ) );
 322         }
 323
 324         /**
 325          * Fetch an integer value from the input or return null if empty.
 326          * Guaranteed to return an integer or null; non-numeric input will
 327          * typically return null.
 328          * @param $name string
 329          * @return int
 330          */
 331         public function getIntOrNull( $name ) {
 332                 $val = $this->getVal( $name );
 333                 return is_numeric( $val )
 334                         ? intval( $val )
 335                         : null;
 336         }
 337
 338         /**
 339          * Fetch a boolean value from the input or return $default if not set.
 340          * Guaranteed to return true or false, with normal PHP semantics for
 341          * boolean interpretation of strings.
 342          * @param $name string
 343          * @param $default bool
 344          * @return bool
 345          */
 346         public function getBool( $name, $default = false ) {
 347                 return $this->getVal( $name, $default ) ? true : false;
 348         }
 349
 350         /**
 351          * Return true if the named value is set in the input, whatever that
 352          * value is (even "0"). Return false if the named value is not set.
 353          * Example use is checking for the presence of check boxes in forms.
 354          * @param $name string
 355          * @return bool
 356          */
 357         public function getCheck( $name ) {
 358                 # Checkboxes and buttons are only present when clicked
 359                 # Presence connotes truth, abscense false
 360                 $val = $this->getVal( $name, null );
 361                 return isset( $val );
 362         }
 363
 364         /**
 365          * Fetch a text string from the given array or return $default if it's not
 366          * set. \r is stripped from the text, and with some language modules there
 367          * is an input transliteration applied. This should generally be used for
 368          * form <textarea> and <input> fields. Used for user-supplied freeform text
 369          * input (for which input transformations may be required - e.g. Esperanto
 370          * x-coding).
 371          *
 372          * @param $name string
 373          * @param $default string: optional
 374          * @return string
 375          */
 376         public function getText( $name, $default = '' ) {
 377                 global $wgContLang;
 378                 $val = $this->getVal( $name, $default );
 379                 return str_replace( "\r\n", "\n",
 380                         $wgContLang->recodeInput( $val ) );
 381         }
 382
 383         /**
 384          * Extracts the given named values into an array.
 385          * If no arguments are given, returns all input values.
 386          * No transformation is performed on the values.
 387          */
 388         public function getValues() {
 389                 $names = func_get_args();
 390                 if ( count( $names ) == 0 ) {
 391                         $names = array_keys( $this->data );
 392                 }
 393
 394                 $retVal = array();
 395                 foreach ( $names as $name ) {
 396                         $value = $this->getVal( $name );
 397                         if ( !is_null( $value ) ) {
 398                                 $retVal[$name] = $value;
 399                         }
 400                 }
 401                 return $retVal;
 402         }
 403
 404         /**
 405          * Returns true if the present request was reached by a POST operation,
 406          * false otherwise (GET, HEAD, or command-line).
 407          *
 408          * Note that values retrieved by the object may come from the
 409          * GET URL etc even on a POST request.
 410          *
 411          * @return bool
 412          */
 413         public function wasPosted() {
 414                 return $_SERVER['REQUEST_METHOD'] == 'POST';
 415         }
 416
 417         /**
 418          * Returns true if there is a session cookie set.
 419          * This does not necessarily mean that the user is logged in!
 420          *
 421          * If you want to check for an open session, use session_id()
 422          * instead; that will also tell you if the session was opened
 423          * during the current request (in which case the cookie will
 424          * be sent back to the client at the end of the script run).
 425          *
 426          * @return bool
 427          */
 428         public function checkSessionCookie() {
 429                 return isset( $_COOKIE[session_name()] );
 430         }
 431
 432         /**
 433          * Return the path portion of the request URI.
 434          * @return string
 435          */
 436         public function getRequestURL() {
 437                 if( isset( $_SERVER['REQUEST_URI'] ) ) {
 438                         $base = $_SERVER['REQUEST_URI'];
 439                 } elseif( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 440                         // Probably IIS; doesn't set REQUEST_URI
 441                         $base = $_SERVER['SCRIPT_NAME'];
 442                         if( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 443                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 444                         }
 445                 } else {
 446                         // This shouldn't happen!
 447                         throw new MWException( "Web server doesn't provide either " .
 448                                 "REQUEST_URI or SCRIPT_NAME. Report details of your " .
 449                                 "web server configuration to http://bugzilla.wikimedia.org/" );
 450                 }
 451                 // User-agents should not send a fragment with the URI, but
 452                 // if they do, and the web server passes it on to us, we
 453                 // need to strip it or we get false-positive redirect loops
 454                 // or weird output URLs
 455                 $hash = strpos( $base, '#' );
 456                 if( $hash !== false ) {
 457                         $base = substr( $base, 0, $hash );
 458                 }
 459                 if( $base{0} == '/' ) {
 460                         return $base;
 461                 } else {
 462                         // We may get paths with a host prepended; strip it.
 463                         return preg_replace( '!^[^:]+://[^/]+/!', '/', $base );
 464                 }
 465         }
 466
 467         /**
 468          * Return the request URI with the canonical service and hostname.
 469          * @return string
 470          */
 471         public function getFullRequestURL() {
 472                 global $wgServer;
 473                 return $wgServer . $this->getRequestURL();
 474         }
 475
 476         /**
 477          * Take an arbitrary query and rewrite the present URL to include it
 478          * @param $query String: query string fragment; do not include initial '?'
 479          * @return string
 480          */
 481         public function appendQuery( $query ) {
 482                 global $wgTitle;
 483                 $basequery = '';
 484                 foreach( $_GET as $var => $val ) {
 485                         if ( $var == 'title' )
 486                                 continue;
 487                         if ( is_array( $val ) )
 488                                 /* This will happen given a request like
 489                                  * http://en.wikipedia.org/w/index.php?title[]=Special:Userlogin&returnto[]=Main_Page
 490                                  */
 491                                 continue;
 492                         $basequery .= '&' . urlencode( $var ) . '=' . urlencode( $val );
 493                 }
 494                 $basequery .= '&' . $query;
 495
 496                 # Trim the extra &
 497                 $basequery = substr( $basequery, 1 );
 498                 return $wgTitle->getLocalURL( $basequery );
 499         }
 500
 501         /**
 502          * HTML-safe version of appendQuery().
 503          * @param $query String: query string fragment; do not include initial '?'
 504          * @return string
 505          */
 506         public function escapeAppendQuery( $query ) {
 507                 return htmlspecialchars( $this->appendQuery( $query ) );
 508         }
 509
 510         public function appendQueryValue( $key, $value, $onlyquery = false ) {
 511                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 512         }
 513
 514         /**
 515          * Appends or replaces value of query variables.
 516          * @param $array Array of values to replace/add to query
 517          * @param $onlyquery Bool: whether to only return the query string and not
 518          *                   the complete URL
 519          * @return string
 520          */
 521         public function appendQueryArray( $array, $onlyquery = false ) {
 522                 global $wgTitle;
 523                 $newquery = $_GET;
 524                 unset( $newquery['title'] );
 525                 $newquery = array_merge( $newquery, $array );
 526                 $query = wfArrayToCGI( $newquery );
 527                 return $onlyquery ? $query : $wgTitle->getLocalURL( $query );
 528         }
 529
 530         /**
 531          * Check for limit and offset parameters on the input, and return sensible
 532          * defaults if not given. The limit must be positive and is capped at 5000.
 533          * Offset must be positive but is not capped.
 534          *
 535          * @param $deflimit Integer: limit to use if no input and the user hasn't set the option.
 536          * @param $optionname String: to specify an option other than rclimit to pull from.
 537          * @return array first element is limit, second is offset
 538          */
 539         public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 540                 global $wgUser;
 541
 542                 $limit = $this->getInt( 'limit', 0 );
 543                 if( $limit < 0 ) $limit = 0;
 544                 if( ( $limit == 0 ) && ( $optionname != '' ) ) {
 545                         $limit = (int)$wgUser->getOption( $optionname );
 546                 }
 547                 if( $limit <= 0 ) $limit = $deflimit;
 548                 if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 549
 550                 $offset = $this->getInt( 'offset', 0 );
 551                 if( $offset < 0 ) $offset = 0;
 552
 553                 return array( $limit, $offset );
 554         }
 555
 556         /**
 557          * Return the path to the temporary file where PHP has stored the upload.
 558          * @param $key String:
 559          * @return string or NULL if no such file.
 560          */
 561         public function getFileTempname( $key ) {
 562                 if( !isset( $_FILES[$key] ) ) {
 563                         return null;
 564                 }
 565                 return $_FILES[$key]['tmp_name'];
 566         }
 567
 568         /**
 569          * Return the size of the upload, or 0.
 570          * @param $key String:
 571          * @return integer
 572          */
 573         public function getFileSize( $key ) {
 574                 if( !isset( $_FILES[$key] ) ) {
 575                         return 0;
 576                 }
 577                 return $_FILES[$key]['size'];
 578         }
 579
 580         /**
 581          * Return the upload error or 0
 582          * @param $key String:
 583          * @return integer
 584          */
 585         public function getUploadError( $key ) {
 586                 if( !isset( $_FILES[$key] ) || !isset( $_FILES[$key]['error'] ) ) {
 587                         return 0/*UPLOAD_ERR_OK*/;
 588                 }
 589                 return $_FILES[$key]['error'];
 590         }
 591
 592         /**
 593          * Return the original filename of the uploaded file, as reported by
 594          * the submitting user agent. HTML-style character entities are
 595          * interpreted and normalized to Unicode normalization form C, in part
 596          * to deal with weird input from Safari with non-ASCII filenames.
 597          *
 598          * Other than this the name is not verified for being a safe filename.
 599          *
 600          * @param $key String:
 601          * @return string or NULL if no such file.
 602          */
 603         public function getFileName( $key ) {
 604                 global $wgContLang;
 605                 if( !isset( $_FILES[$key] ) ) {
 606                         return null;
 607                 }
 608                 $name = $_FILES[$key]['name'];
 609
 610                 # Safari sends filenames in HTML-encoded Unicode form D...
 611                 # Horrid and evil! Let's try to make some kind of sense of it.
 612                 $name = Sanitizer::decodeCharReferences( $name );
 613                 $name = $wgContLang->normalize( $name );
 614                 wfDebug( "WebRequest::getFileName() '" . $_FILES[$key]['name'] . "' normalized to '$name'\n" );
 615                 return $name;
 616         }
 617
 618         /**
 619          * Return a handle to WebResponse style object, for setting cookies,
 620          * headers and other stuff, for Request being worked on.
 621          */
 622         public function response() {
 623                 /* Lazy initialization of response object for this request */
 624                 if ( !is_object( $this->_response ) ) {
 625                         $this->_response = new WebResponse;
 626                 }
 627                 return $this->_response;
 628         }
 629
 630         /**
 631          * Get a request header, or false if it isn't set
 632          * @param $name String: case-insensitive header name
 633          */
 634         public function getHeader( $name ) {
 635                 $name = strtoupper( $name );
 636                 if ( function_exists( 'apache_request_headers' ) ) {
 637                         if ( !$this->headers ) {
 638                                 foreach ( apache_request_headers() as $tempName => $tempValue ) {
 639                                         $this->headers[ strtoupper( $tempName ) ] = $tempValue;
 640                                 }
 641                         }
 642                         if ( isset( $this->headers[$name] ) ) {
 643                                 return $this->headers[$name];
 644                         } else {
 645                                 return false;
 646                         }
 647                 } else {
 648                         $name = 'HTTP_' . str_replace( '-', '_', $name );
 649                         if ( isset( $_SERVER[$name] ) ) {
 650                                 return $_SERVER[$name];
 651                         } else {
 652                                 return false;
 653                         }
 654                 }
 655         }
 656
 657         /*
 658          * Get data from $_SESSION
 659          * @param $key String Name of key in $_SESSION
 660          * @return mixed
 661          */
 662         public function getSessionData( $key ) {
 663                 if( !isset( $_SESSION[$key] ) )
 664                         return null;
 665                 return $_SESSION[$key];
 666         }
 667
 668         /**
 669          * Set session data
 670          * @param $key String Name of key in $_SESSION
 671          * @param $data mixed
 672          */
 673         public function setSessionData( $key, $data ) {
 674                 $_SESSION[$key] = $data;
 675         }
 676
 677         /**
 678          * Returns true if the PATH_INFO ends with an extension other than a script
 679          * extension. This could confuse IE for scripts that send arbitrary data which
 680          * is not HTML but may be detected as such.
 681          *
 682          * Various past attempts to use the URL to make this check have generally
 683          * run up against the fact that CGI does not provide a standard method to
 684          * determine the URL. PATH_INFO may be mangled (e.g. if cgi.fix_pathinfo=0),
 685          * but only by prefixing it with the script name and maybe some other stuff,
 686          * the extension is not mangled. So this should be a reasonably portable
 687          * way to perform this security check.
 688          */
 689         public function isPathInfoBad() {
 690                 global $wgScriptExtension;
 691
 692                 if ( !isset( $_SERVER['PATH_INFO'] ) ) {
 693                         return false;
 694                 }
 695                 $pi = $_SERVER['PATH_INFO'];
 696                 $dotPos = strrpos( $pi, '.' );
 697                 if ( $dotPos === false ) {
 698                         return false;
 699                 }
 700                 $ext = substr( $pi, $dotPos );
 701                 return !in_array( $ext, array( $wgScriptExtension, '.php', '.php5' ) );
 702         }
 703 }
 704
 705 /**
 706  * WebRequest clone which takes values from a provided array.
 707  *
 708  * @ingroup HTTP
 709  */
 710 class FauxRequest extends WebRequest {
 711         private $wasPosted = false;
 712         private $session = array();
 713
 714         /**
 715          * @param $data Array of *non*-urlencoded key => value pairs, the
 716          *   fake GET/POST values
 717          * @param $wasPosted Bool: whether to treat the data as POST
 718          */
 719         public function __construct( $data, $wasPosted = false, $session = null ) {
 720                 if( is_array( $data ) ) {
 721                         $this->data = $data;
 722                 } else {
 723                         throw new MWException( "FauxRequest() got bogus data" );
 724                 }
 725                 $this->wasPosted = $wasPosted;
 726                 if( $session )
 727                         $this->session = $session;
 728         }
 729
 730         private function notImplemented( $method ) {
 731                 throw new MWException( "{$method}() not implemented" );
 732         }
 733
 734         public function getText( $name, $default = '' ) {
 735                 # Override; don't recode since we're using internal data
 736                 return (string)$this->getVal( $name, $default );
 737         }
 738
 739         public function getValues() {
 740                 return $this->data;
 741         }
 742
 743         public function wasPosted() {
 744                 return $this->wasPosted;
 745         }
 746
 747         public function checkSessionCookie() {
 748                 return false;
 749         }
 750
 751         public function getRequestURL() {
 752                 $this->notImplemented( __METHOD__ );
 753         }
 754
 755         public function appendQuery( $query ) {
 756                 $this->notImplemented( __METHOD__ );
 757         }
 758
 759         public function getHeader( $name ) {
 760                 return isset( $this->headers[$name] ) ? $this->headers[$name] : false;
 761         }
 762
 763         public function getSessionData( $key ) {
 764                 if( !isset( $this->session[$key] ) )
 765                         return null;
 766                 return $this->session[$key];
 767         }
 768
 769         public function setSessionData( $key, $data ) {
 770                 $this->notImplemented( __METHOD__ );
 771         }
 772
 773         public function isPathInfoBad() {
 774                 return false;
 775         }
 776
 777 }