includes/WebRequest.php

   1 <?php
   2 /**
   3  * Deal with importing all those nasty globals and things
   4  *
   5  * Copyright © 2003 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  */
  25
  26 /**
  27  * The WebRequest class encapsulates getting at data passed in the
  28  * URL or via a POSTed form stripping illegal input characters and
  29  * normalizing Unicode sequences.
  30  *
  31  * Usually this is used via a global singleton, $wgRequest. You should
  32  * not create a second WebRequest object; make a FauxRequest object if
  33  * you want to pass arbitrary data to some function in place of the web
  34  * input.
  35  *
  36  * @ingroup HTTP
  37  */
  38 class WebRequest {
  39         protected $data, $headers = array();
  40
  41         /**
  42          * Flag to make WebRequest::getHeader return an array of values.
  43          * @since 1.26
  44          */
  45         const GETHEADER_LIST = 1;
  46
  47         /**
  48          * Lazy-init response object
  49          * @var WebResponse
  50          */
  51         private $response;
  52
  53         /**
  54          * Cached client IP address
  55          * @var string
  56          */
  57         private $ip;
  58
  59         /**
  60          * The timestamp of the start of the request, with microsecond precision.
  61          * @var float
  62          */
  63         protected $requestTime;
  64
  65         /**
  66          * Cached URL protocol
  67          * @var string
  68          */
  69         protected $protocol;
  70
  71         public function __construct() {
  72                 $this->requestTime = isset( $_SERVER['REQUEST_TIME_FLOAT'] )
  73                         ? $_SERVER['REQUEST_TIME_FLOAT'] : microtime( true );
  74
  75                 // POST overrides GET data
  76                 // We don't use $_REQUEST here to avoid interference from cookies...
  77                 $this->data = $_POST + $_GET;
  78         }
  79
  80         /**
  81          * Extract relevant query arguments from the http request uri's path
  82          * to be merged with the normal php provided query arguments.
  83          * Tries to use the REQUEST_URI data if available and parses it
  84          * according to the wiki's configuration looking for any known pattern.
  85          *
  86          * If the REQUEST_URI is not provided we'll fall back on the PATH_INFO
  87          * provided by the server if any and use that to set a 'title' parameter.
  88          *
  89          * @param string $want If this is not 'all', then the function
  90          * will return an empty array if it determines that the URL is
  91          * inside a rewrite path.
  92          *
  93          * @return array Any query arguments found in path matches.
  94          */
  95         public static function getPathInfo( $want = 'all' ) {
  96                 global $wgUsePathInfo;
  97                 // PATH_INFO is mangled due to http://bugs.php.net/bug.php?id=31892
  98                 // And also by Apache 2.x, double slashes are converted to single slashes.
  99                 // So we will use REQUEST_URI if possible.
 100                 $matches = array();
 101                 if ( !empty( $_SERVER['REQUEST_URI'] ) ) {
 102                         // Slurp out the path portion to examine...
 103                         $url = $_SERVER['REQUEST_URI'];
 104                         if ( !preg_match( '!^https?://!', $url ) ) {
 105                                 $url = 'http://unused' . $url;
 106                         }
 107                         MediaWiki\suppressWarnings();
 108                         $a = parse_url( $url );
 109                         MediaWiki\restoreWarnings();
 110                         if ( $a ) {
 111                                 $path = isset( $a['path'] ) ? $a['path'] : '';
 112
 113                                 global $wgScript;
 114                                 if ( $path == $wgScript && $want !== 'all' ) {
 115                                         // Script inside a rewrite path?
 116                                         // Abort to keep from breaking...
 117                                         return $matches;
 118                                 }
 119
 120                                 $router = new PathRouter;
 121
 122                                 // Raw PATH_INFO style
 123                                 $router->add( "$wgScript/$1" );
 124
 125                                 if ( isset( $_SERVER['SCRIPT_NAME'] )
 126                                         && preg_match( '/\.php5?/', $_SERVER['SCRIPT_NAME'] )
 127                                 ) {
 128                                         # Check for SCRIPT_NAME, we handle index.php explicitly
 129                                         # But we do have some other .php files such as img_auth.php
 130                                         # Don't let root article paths clober the parsing for them
 131                                         $router->add( $_SERVER['SCRIPT_NAME'] . "/$1" );
 132                                 }
 133
 134                                 global $wgArticlePath;
 135                                 if ( $wgArticlePath ) {
 136                                         $router->add( $wgArticlePath );
 137                                 }
 138
 139                                 global $wgActionPaths;
 140                                 if ( $wgActionPaths ) {
 141                                         $router->add( $wgActionPaths, array( 'action' => '$key' ) );
 142                                 }
 143
 144                                 global $wgVariantArticlePath, $wgContLang;
 145                                 if ( $wgVariantArticlePath ) {
 146                                         $router->add( $wgVariantArticlePath,
 147                                                 array( 'variant' => '$2' ),
 148                                                 array( '$2' => $wgContLang->getVariants() )
 149                                         );
 150                                 }
 151
 152                                 Hooks::run( 'WebRequestPathInfoRouter', array( $router ) );
 153
 154                                 $matches = $router->parse( $path );
 155                         }
 156                 } elseif ( $wgUsePathInfo ) {
 157                         if ( isset( $_SERVER['ORIG_PATH_INFO'] ) && $_SERVER['ORIG_PATH_INFO'] != '' ) {
 158                                 // Mangled PATH_INFO
 159                                 // http://bugs.php.net/bug.php?id=31892
 160                                 // Also reported when ini_get('cgi.fix_pathinfo')==false
 161                                 $matches['title'] = substr( $_SERVER['ORIG_PATH_INFO'], 1 );
 162
 163                         } elseif ( isset( $_SERVER['PATH_INFO'] ) && $_SERVER['PATH_INFO'] != '' ) {
 164                                 // Regular old PATH_INFO yay
 165                                 $matches['title'] = substr( $_SERVER['PATH_INFO'], 1 );
 166                         }
 167                 }
 168
 169                 return $matches;
 170         }
 171
 172         /**
 173          * Work out an appropriate URL prefix containing scheme and host, based on
 174          * information detected from $_SERVER
 175          *
 176          * @return string
 177          */
 178         public static function detectServer() {
 179                 global $wgAssumeProxiesUseDefaultProtocolPorts;
 180
 181                 $proto = self::detectProtocol();
 182                 $stdPort = $proto === 'https' ? 443 : 80;
 183
 184                 $varNames = array( 'HTTP_HOST', 'SERVER_NAME', 'HOSTNAME', 'SERVER_ADDR' );
 185                 $host = 'localhost';
 186                 $port = $stdPort;
 187                 foreach ( $varNames as $varName ) {
 188                         if ( !isset( $_SERVER[$varName] ) ) {
 189                                 continue;
 190                         }
 191
 192                         $parts = IP::splitHostAndPort( $_SERVER[$varName] );
 193                         if ( !$parts ) {
 194                                 // Invalid, do not use
 195                                 continue;
 196                         }
 197
 198                         $host = $parts[0];
 199                         if ( $wgAssumeProxiesUseDefaultProtocolPorts && isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) ) {
 200                                 // Bug 70021: Assume that upstream proxy is running on the default
 201                                 // port based on the protocol. We have no reliable way to determine
 202                                 // the actual port in use upstream.
 203                                 $port = $stdPort;
 204                         } elseif ( $parts[1] === false ) {
 205                                 if ( isset( $_SERVER['SERVER_PORT'] ) ) {
 206                                         $port = $_SERVER['SERVER_PORT'];
 207                                 } // else leave it as $stdPort
 208                         } else {
 209                                 $port = $parts[1];
 210                         }
 211                         break;
 212                 }
 213
 214                 return $proto . '://' . IP::combineHostAndPort( $host, $port, $stdPort );
 215         }
 216
 217         /**
 218          * Detect the protocol from $_SERVER.
 219          * This is for use prior to Setup.php, when no WebRequest object is available.
 220          * At other times, use the non-static function getProtocol().
 221          *
 222          * @return array
 223          */
 224         public static function detectProtocol() {
 225                 if ( ( !empty( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] !== 'off' ) ||
 226                         ( isset( $_SERVER['HTTP_X_FORWARDED_PROTO'] ) &&
 227                         $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https' ) ) {
 228                         return 'https';
 229                 } else {
 230                         return 'http';
 231                 }
 232         }
 233
 234         /**
 235          * Get the number of seconds to have elapsed since request start,
 236          * in fractional seconds, with microsecond resolution.
 237          *
 238          * @return float
 239          * @since 1.25
 240          */
 241         public function getElapsedTime() {
 242                 return microtime( true ) - $this->requestTime;
 243         }
 244
 245         /**
 246          * Get the current URL protocol (http or https)
 247          * @return string
 248          */
 249         public function getProtocol() {
 250                 if ( $this->protocol === null ) {
 251                         $this->protocol = self::detectProtocol();
 252                 }
 253                 return $this->protocol;
 254         }
 255
 256         /**
 257          * Check for title, action, and/or variant data in the URL
 258          * and interpolate it into the GET variables.
 259          * This should only be run after $wgContLang is available,
 260          * as we may need the list of language variants to determine
 261          * available variant URLs.
 262          */
 263         public function interpolateTitle() {
 264                 // bug 16019: title interpolation on API queries is useless and sometimes harmful
 265                 if ( defined( 'MW_API' ) ) {
 266                         return;
 267                 }
 268
 269                 $matches = self::getPathInfo( 'title' );
 270                 foreach ( $matches as $key => $val ) {
 271                         $this->data[$key] = $_GET[$key] = $_REQUEST[$key] = $val;
 272                 }
 273         }
 274
 275         /**
 276          * URL rewriting function; tries to extract page title and,
 277          * optionally, one other fixed parameter value from a URL path.
 278          *
 279          * @param string $path The URL path given from the client
 280          * @param array $bases One or more URLs, optionally with $1 at the end
 281          * @param string $key If provided, the matching key in $bases will be
 282          *    passed on as the value of this URL parameter
 283          * @return array Array of URL variables to interpolate; empty if no match
 284          */
 285         static function extractTitle( $path, $bases, $key = false ) {
 286                 foreach ( (array)$bases as $keyValue => $base ) {
 287                         // Find the part after $wgArticlePath
 288                         $base = str_replace( '$1', '', $base );
 289                         $baseLen = strlen( $base );
 290                         if ( substr( $path, 0, $baseLen ) == $base ) {
 291                                 $raw = substr( $path, $baseLen );
 292                                 if ( $raw !== '' ) {
 293                                         $matches = array( 'title' => rawurldecode( $raw ) );
 294                                         if ( $key ) {
 295                                                 $matches[$key] = $keyValue;
 296                                         }
 297                                         return $matches;
 298                                 }
 299                         }
 300                 }
 301                 return array();
 302         }
 303
 304         /**
 305          * Recursively normalizes UTF-8 strings in the given array.
 306          *
 307          * @param string|array $data
 308          * @return array|string Cleaned-up version of the given
 309          * @private
 310          */
 311         function normalizeUnicode( $data ) {
 312                 if ( is_array( $data ) ) {
 313                         foreach ( $data as $key => $val ) {
 314                                 $data[$key] = $this->normalizeUnicode( $val );
 315                         }
 316                 } else {
 317                         global $wgContLang;
 318                         $data = isset( $wgContLang ) ? $wgContLang->normalize( $data ) : UtfNormal\Validator::cleanUp( $data );
 319                 }
 320                 return $data;
 321         }
 322
 323         /**
 324          * Fetch a value from the given array or return $default if it's not set.
 325          *
 326          * @param array $arr
 327          * @param string $name
 328          * @param mixed $default
 329          * @return mixed
 330          */
 331         private function getGPCVal( $arr, $name, $default ) {
 332                 # PHP is so nice to not touch input data, except sometimes:
 333                 # http://us2.php.net/variables.external#language.variables.external.dot-in-names
 334                 # Work around PHP *feature* to avoid *bugs* elsewhere.
 335                 $name = strtr( $name, '.', '_' );
 336                 if ( isset( $arr[$name] ) ) {
 337                         global $wgContLang;
 338                         $data = $arr[$name];
 339                         if ( isset( $_GET[$name] ) && !is_array( $data ) ) {
 340                                 # Check for alternate/legacy character encoding.
 341                                 if ( isset( $wgContLang ) ) {
 342                                         $data = $wgContLang->checkTitleEncoding( $data );
 343                                 }
 344                         }
 345                         $data = $this->normalizeUnicode( $data );
 346                         return $data;
 347                 } else {
 348                         return $default;
 349                 }
 350         }
 351
 352         /**
 353          * Fetch a scalar from the input or return $default if it's not set.
 354          * Returns a string. Arrays are discarded. Useful for
 355          * non-freeform text inputs (e.g. predefined internal text keys
 356          * selected by a drop-down menu). For freeform input, see getText().
 357          *
 358          * @param string $name
 359          * @param string $default Optional default (or null)
 360          * @return string
 361          */
 362         public function getVal( $name, $default = null ) {
 363                 $val = $this->getGPCVal( $this->data, $name, $default );
 364                 if ( is_array( $val ) ) {
 365                         $val = $default;
 366                 }
 367                 if ( is_null( $val ) ) {
 368                         return $val;
 369                 } else {
 370                         return (string)$val;
 371                 }
 372         }
 373
 374         /**
 375          * Set an arbitrary value into our get/post data.
 376          *
 377          * @param string $key Key name to use
 378          * @param mixed $value Value to set
 379          * @return mixed Old value if one was present, null otherwise
 380          */
 381         public function setVal( $key, $value ) {
 382                 $ret = isset( $this->data[$key] ) ? $this->data[$key] : null;
 383                 $this->data[$key] = $value;
 384                 return $ret;
 385         }
 386
 387         /**
 388          * Unset an arbitrary value from our get/post data.
 389          *
 390          * @param string $key Key name to use
 391          * @return mixed Old value if one was present, null otherwise
 392          */
 393         public function unsetVal( $key ) {
 394                 if ( !isset( $this->data[$key] ) ) {
 395                         $ret = null;
 396                 } else {
 397                         $ret = $this->data[$key];
 398                         unset( $this->data[$key] );
 399                 }
 400                 return $ret;
 401         }
 402
 403         /**
 404          * Fetch an array from the input or return $default if it's not set.
 405          * If source was scalar, will return an array with a single element.
 406          * If no source and no default, returns null.
 407          *
 408          * @param string $name
 409          * @param array $default Optional default (or null)
 410          * @return array
 411          */
 412         public function getArray( $name, $default = null ) {
 413                 $val = $this->getGPCVal( $this->data, $name, $default );
 414                 if ( is_null( $val ) ) {
 415                         return null;
 416                 } else {
 417                         return (array)$val;
 418                 }
 419         }
 420
 421         /**
 422          * Fetch an array of integers, or return $default if it's not set.
 423          * If source was scalar, will return an array with a single element.
 424          * If no source and no default, returns null.
 425          * If an array is returned, contents are guaranteed to be integers.
 426          *
 427          * @param string $name
 428          * @param array $default Option default (or null)
 429          * @return array Array of ints
 430          */
 431         public function getIntArray( $name, $default = null ) {
 432                 $val = $this->getArray( $name, $default );
 433                 if ( is_array( $val ) ) {
 434                         $val = array_map( 'intval', $val );
 435                 }
 436                 return $val;
 437         }
 438
 439         /**
 440          * Fetch an integer value from the input or return $default if not set.
 441          * Guaranteed to return an integer; non-numeric input will typically
 442          * return 0.
 443          *
 444          * @param string $name
 445          * @param int $default
 446          * @return int
 447          */
 448         public function getInt( $name, $default = 0 ) {
 449                 return intval( $this->getVal( $name, $default ) );
 450         }
 451
 452         /**
 453          * Fetch an integer value from the input or return null if empty.
 454          * Guaranteed to return an integer or null; non-numeric input will
 455          * typically return null.
 456          *
 457          * @param string $name
 458          * @return int|null
 459          */
 460         public function getIntOrNull( $name ) {
 461                 $val = $this->getVal( $name );
 462                 return is_numeric( $val )
 463                         ? intval( $val )
 464                         : null;
 465         }
 466
 467         /**
 468          * Fetch a floating point value from the input or return $default if not set.
 469          * Guaranteed to return a float; non-numeric input will typically
 470          * return 0.
 471          *
 472          * @since 1.23
 473          * @param string $name
 474          * @param float $default
 475          * @return float
 476          */
 477         public function getFloat( $name, $default = 0.0 ) {
 478                 return floatval( $this->getVal( $name, $default ) );
 479         }
 480
 481         /**
 482          * Fetch a boolean value from the input or return $default if not set.
 483          * Guaranteed to return true or false, with normal PHP semantics for
 484          * boolean interpretation of strings.
 485          *
 486          * @param string $name
 487          * @param bool $default
 488          * @return bool
 489          */
 490         public function getBool( $name, $default = false ) {
 491                 return (bool)$this->getVal( $name, $default );
 492         }
 493
 494         /**
 495          * Fetch a boolean value from the input or return $default if not set.
 496          * Unlike getBool, the string "false" will result in boolean false, which is
 497          * useful when interpreting information sent from JavaScript.
 498          *
 499          * @param string $name
 500          * @param bool $default
 501          * @return bool
 502          */
 503         public function getFuzzyBool( $name, $default = false ) {
 504                 return $this->getBool( $name, $default ) && strcasecmp( $this->getVal( $name ), 'false' ) !== 0;
 505         }
 506
 507         /**
 508          * Return true if the named value is set in the input, whatever that
 509          * value is (even "0"). Return false if the named value is not set.
 510          * Example use is checking for the presence of check boxes in forms.
 511          *
 512          * @param string $name
 513          * @return bool
 514          */
 515         public function getCheck( $name ) {
 516                 # Checkboxes and buttons are only present when clicked
 517                 # Presence connotes truth, absence false
 518                 return $this->getVal( $name, null ) !== null;
 519         }
 520
 521         /**
 522          * Fetch a text string from the given array or return $default if it's not
 523          * set. Carriage returns are stripped from the text, and with some language
 524          * modules there is an input transliteration applied. This should generally
 525          * be used for form "<textarea>" and "<input>" fields. Used for
 526          * user-supplied freeform text input (for which input transformations may
 527          * be required - e.g.  Esperanto x-coding).
 528          *
 529          * @param string $name
 530          * @param string $default Optional
 531          * @return string
 532          */
 533         public function getText( $name, $default = '' ) {
 534                 global $wgContLang;
 535                 $val = $this->getVal( $name, $default );
 536                 return str_replace( "\r\n", "\n",
 537                         $wgContLang->recodeInput( $val ) );
 538         }
 539
 540         /**
 541          * Extracts the given named values into an array.
 542          * If no arguments are given, returns all input values.
 543          * No transformation is performed on the values.
 544          *
 545          * @return array
 546          */
 547         public function getValues() {
 548                 $names = func_get_args();
 549                 if ( count( $names ) == 0 ) {
 550                         $names = array_keys( $this->data );
 551                 }
 552
 553                 $retVal = array();
 554                 foreach ( $names as $name ) {
 555                         $value = $this->getGPCVal( $this->data, $name, null );
 556                         if ( !is_null( $value ) ) {
 557                                 $retVal[$name] = $value;
 558                         }
 559                 }
 560                 return $retVal;
 561         }
 562
 563         /**
 564          * Returns the names of all input values excluding those in $exclude.
 565          *
 566          * @param array $exclude
 567          * @return array
 568          */
 569         public function getValueNames( $exclude = array() ) {
 570                 return array_diff( array_keys( $this->getValues() ), $exclude );
 571         }
 572
 573         /**
 574          * Get the values passed in the query string.
 575          * No transformation is performed on the values.
 576          *
 577          * @return array
 578          */
 579         public function getQueryValues() {
 580                 return $_GET;
 581         }
 582
 583         /**
 584          * Return the contents of the Query with no decoding. Use when you need to
 585          * know exactly what was sent, e.g. for an OAuth signature over the elements.
 586          *
 587          * @return string
 588          */
 589         public function getRawQueryString() {
 590                 return $_SERVER['QUERY_STRING'];
 591         }
 592
 593         /**
 594          * Return the contents of the POST with no decoding. Use when you need to
 595          * know exactly what was sent, e.g. for an OAuth signature over the elements.
 596          *
 597          * @return string
 598          */
 599         public function getRawPostString() {
 600                 if ( !$this->wasPosted() ) {
 601                         return '';
 602                 }
 603                 return $this->getRawInput();
 604         }
 605
 606         /**
 607          * Return the raw request body, with no processing. Cached since some methods
 608          * disallow reading the stream more than once. As stated in the php docs, this
 609          * does not work with enctype="multipart/form-data".
 610          *
 611          * @return string
 612          */
 613         public function getRawInput() {
 614                 static $input = null;
 615                 if ( $input === null ) {
 616                         $input = file_get_contents( 'php://input' );
 617                 }
 618                 return $input;
 619         }
 620
 621         /**
 622          * Get the HTTP method used for this request.
 623          *
 624          * @return string
 625          */
 626         public function getMethod() {
 627                 return isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] : 'GET';
 628         }
 629
 630         /**
 631          * Returns true if the present request was reached by a POST operation,
 632          * false otherwise (GET, HEAD, or command-line).
 633          *
 634          * Note that values retrieved by the object may come from the
 635          * GET URL etc even on a POST request.
 636          *
 637          * @return bool
 638          */
 639         public function wasPosted() {
 640                 return $this->getMethod() == 'POST';
 641         }
 642
 643         /**
 644          * Returns true if there is a session cookie set.
 645          * This does not necessarily mean that the user is logged in!
 646          *
 647          * If you want to check for an open session, use session_id()
 648          * instead; that will also tell you if the session was opened
 649          * during the current request (in which case the cookie will
 650          * be sent back to the client at the end of the script run).
 651          *
 652          * @return bool
 653          */
 654         public function checkSessionCookie() {
 655                 return isset( $_COOKIE[session_name()] );
 656         }
 657
 658         /**
 659          * Get a cookie from the $_COOKIE jar
 660          *
 661          * @param string $key The name of the cookie
 662          * @param string $prefix A prefix to use for the cookie name, if not $wgCookiePrefix
 663          * @param mixed $default What to return if the value isn't found
 664          * @return mixed Cookie value or $default if the cookie not set
 665          */
 666         public function getCookie( $key, $prefix = null, $default = null ) {
 667                 if ( $prefix === null ) {
 668                         global $wgCookiePrefix;
 669                         $prefix = $wgCookiePrefix;
 670                 }
 671                 return $this->getGPCVal( $_COOKIE, $prefix . $key, $default );
 672         }
 673
 674         /**
 675          * Return the path and query string portion of the request URI.
 676          * This will be suitable for use as a relative link in HTML output.
 677          *
 678          * @throws MWException
 679          * @return string
 680          */
 681         public function getRequestURL() {
 682                 if ( isset( $_SERVER['REQUEST_URI'] ) && strlen( $_SERVER['REQUEST_URI'] ) ) {
 683                         $base = $_SERVER['REQUEST_URI'];
 684                 } elseif ( isset( $_SERVER['HTTP_X_ORIGINAL_URL'] )
 685                         && strlen( $_SERVER['HTTP_X_ORIGINAL_URL'] )
 686                 ) {
 687                         // Probably IIS; doesn't set REQUEST_URI
 688                         $base = $_SERVER['HTTP_X_ORIGINAL_URL'];
 689                 } elseif ( isset( $_SERVER['SCRIPT_NAME'] ) ) {
 690                         $base = $_SERVER['SCRIPT_NAME'];
 691                         if ( isset( $_SERVER['QUERY_STRING'] ) && $_SERVER['QUERY_STRING'] != '' ) {
 692                                 $base .= '?' . $_SERVER['QUERY_STRING'];
 693                         }
 694                 } else {
 695                         // This shouldn't happen!
 696                         throw new MWException( "Web server doesn't provide either " .
 697                                 "REQUEST_URI, HTTP_X_ORIGINAL_URL or SCRIPT_NAME. Report details " .
 698                                 "of your web server configuration to https://phabricator.wikimedia.org/" );
 699                 }
 700                 // User-agents should not send a fragment with the URI, but
 701                 // if they do, and the web server passes it on to us, we
 702                 // need to strip it or we get false-positive redirect loops
 703                 // or weird output URLs
 704                 $hash = strpos( $base, '#' );
 705                 if ( $hash !== false ) {
 706                         $base = substr( $base, 0, $hash );
 707                 }
 708
 709                 if ( $base[0] == '/' ) {
 710                         // More than one slash will look like it is protocol relative
 711                         return preg_replace( '!^/+!', '/', $base );
 712                 } else {
 713                         // We may get paths with a host prepended; strip it.
 714                         return preg_replace( '!^[^:]+://[^/]+/+!', '/', $base );
 715                 }
 716         }
 717
 718         /**
 719          * Return the request URI with the canonical service and hostname, path,
 720          * and query string. This will be suitable for use as an absolute link
 721          * in HTML or other output.
 722          *
 723          * If $wgServer is protocol-relative, this will return a fully
 724          * qualified URL with the protocol that was used for this request.
 725          *
 726          * @return string
 727          */
 728         public function getFullRequestURL() {
 729                 return wfExpandUrl( $this->getRequestURL(), PROTO_CURRENT );
 730         }
 731
 732         /**
 733          * Take an arbitrary query and rewrite the present URL to include it
 734          * @deprecated Use appendQueryValue/appendQueryArray instead
 735          * @param string $query Query string fragment; do not include initial '?'
 736          * @return string
 737          */
 738         public function appendQuery( $query ) {
 739                 wfDeprecated( __METHOD__, '1.25' );
 740                 return $this->appendQueryArray( wfCgiToArray( $query ) );
 741         }
 742
 743         /**
 744          * @param string $key
 745          * @param string $value
 746          * @param bool $onlyquery [deprecated]
 747          * @return string
 748          */
 749         public function appendQueryValue( $key, $value, $onlyquery = true ) {
 750                 return $this->appendQueryArray( array( $key => $value ), $onlyquery );
 751         }
 752
 753         /**
 754          * Appends or replaces value of query variables.
 755          *
 756          * @param array $array Array of values to replace/add to query
 757          * @param bool $onlyquery Whether to only return the query string and not the complete URL [deprecated]
 758          * @return string
 759          */
 760         public function appendQueryArray( $array, $onlyquery = true ) {
 761                 global $wgTitle;
 762                 $newquery = $this->getQueryValues();
 763                 unset( $newquery['title'] );
 764                 $newquery = array_merge( $newquery, $array );
 765                 $query = wfArrayToCgi( $newquery );
 766                 if ( !$onlyquery ) {
 767                         wfDeprecated( __METHOD__, '1.25' );
 768                         return $wgTitle->getLocalURL( $query );
 769                 }
 770
 771                 return $query;
 772         }
 773
 774         /**
 775          * Check for limit and offset parameters on the input, and return sensible
 776          * defaults if not given. The limit must be positive and is capped at 5000.
 777          * Offset must be positive but is not capped.
 778          *
 779          * @param int $deflimit Limit to use if no input and the user hasn't set the option.
 780          * @param string $optionname To specify an option other than rclimit to pull from.
 781          * @return int[] First element is limit, second is offset
 782          */
 783         public function getLimitOffset( $deflimit = 50, $optionname = 'rclimit' ) {
 784                 global $wgUser;
 785
 786                 $limit = $this->getInt( 'limit', 0 );
 787                 if ( $limit < 0 ) {
 788                         $limit = 0;
 789                 }
 790                 if ( ( $limit == 0 ) && ( $optionname != '' ) ) {
 791                         $limit = $wgUser->getIntOption( $optionname );
 792                 }
 793                 if ( $limit <= 0 ) {
 794                         $limit = $deflimit;
 795                 }
 796                 if ( $limit > 5000 ) {
 797                         $limit = 5000; # We have *some* limits...
 798                 }
 799
 800                 $offset = $this->getInt( 'offset', 0 );
 801                 if ( $offset < 0 ) {
 802                         $offset = 0;
 803                 }
 804
 805                 return array( $limit, $offset );
 806         }
 807
 808         /**
 809          * Return the path to the temporary file where PHP has stored the upload.
 810          *
 811          * @param string $key
 812          * @return string|null String or null if no such file.
 813          */
 814         public function getFileTempname( $key ) {
 815                 $file = new WebRequestUpload( $this, $key );
 816                 return $file->getTempName();
 817         }
 818
 819         /**
 820          * Return the upload error or 0
 821          *
 822          * @param string $key
 823          * @return int
 824          */
 825         public function getUploadError( $key ) {
 826                 $file = new WebRequestUpload( $this, $key );
 827                 return $file->getError();
 828         }
 829
 830         /**
 831          * Return the original filename of the uploaded file, as reported by
 832          * the submitting user agent. HTML-style character entities are
 833          * interpreted and normalized to Unicode normalization form C, in part
 834          * to deal with weird input from Safari with non-ASCII filenames.
 835          *
 836          * Other than this the name is not verified for being a safe filename.
 837          *
 838          * @param string $key
 839          * @return string|null String or null if no such file.
 840          */
 841         public function getFileName( $key ) {
 842                 $file = new WebRequestUpload( $this, $key );
 843                 return $file->getName();
 844         }
 845
 846         /**
 847          * Return a WebRequestUpload object corresponding to the key
 848          *
 849          * @param string $key
 850          * @return WebRequestUpload
 851          */
 852         public function getUpload( $key ) {
 853                 return new WebRequestUpload( $this, $key );
 854         }
 855
 856         /**
 857          * Return a handle to WebResponse style object, for setting cookies,
 858          * headers and other stuff, for Request being worked on.
 859          *
 860          * @return WebResponse
 861          */
 862         public function response() {
 863                 /* Lazy initialization of response object for this request */
 864                 if ( !is_object( $this->response ) ) {
 865                         $class = ( $this instanceof FauxRequest ) ? 'FauxResponse' : 'WebResponse';
 866                         $this->response = new $class();
 867                 }
 868                 return $this->response;
 869         }
 870
 871         /**
 872          * Initialise the header list
 873          */
 874         protected function initHeaders() {
 875                 if ( count( $this->headers ) ) {
 876                         return;
 877                 }
 878
 879                 $apacheHeaders = function_exists( 'apache_request_headers' ) ? apache_request_headers() : false;
 880                 if ( $apacheHeaders ) {
 881                         foreach ( $apacheHeaders as $tempName => $tempValue ) {
 882                                 $this->headers[strtoupper( $tempName )] = $tempValue;
 883                         }
 884                 } else {
 885                         foreach ( $_SERVER as $name => $value ) {
 886                                 if ( substr( $name, 0, 5 ) === 'HTTP_' ) {
 887                                         $name = str_replace( '_', '-', substr( $name, 5 ) );
 888                                         $this->headers[$name] = $value;
 889                                 } elseif ( $name === 'CONTENT_LENGTH' ) {
 890                                         $this->headers['CONTENT-LENGTH'] = $value;
 891                                 }
 892                         }
 893                 }
 894         }
 895
 896         /**
 897          * Get an array containing all request headers
 898          *
 899          * @return array Mapping header name to its value
 900          */
 901         public function getAllHeaders() {
 902                 $this->initHeaders();
 903                 return $this->headers;
 904         }
 905
 906         /**
 907          * Get a request header, or false if it isn't set.
 908          *
 909          * @param string $name Case-insensitive header name
 910          * @param int $flags Bitwise combination of:
 911          *   WebRequest::GETHEADER_LIST  Treat the header as a comma-separated list
 912          *                               of values, as described in RFC 2616 § 4.2.
 913          *                               (since 1.26).
 914          * @return string|array|bool False if header is unset; otherwise the
 915          *  header value(s) as either a string (the default) or an array, if
 916          *  WebRequest::GETHEADER_LIST flag was set.
 917          */
 918         public function getHeader( $name, $flags = 0 ) {
 919                 $this->initHeaders();
 920                 $name = strtoupper( $name );
 921                 if ( !isset( $this->headers[$name] ) ) {
 922                         return false;
 923                 }
 924                 $value = $this->headers[$name];
 925                 if ( $flags & self::GETHEADER_LIST ) {
 926                         $value = array_map( 'trim', explode( ',', $value ) );
 927                 }
 928                 return $value;
 929         }
 930
 931         /**
 932          * Get data from $_SESSION
 933          *
 934          * @param string $key Name of key in $_SESSION
 935          * @return mixed
 936          */
 937         public function getSessionData( $key ) {
 938                 if ( !isset( $_SESSION[$key] ) ) {
 939                         return null;
 940                 }
 941                 return $_SESSION[$key];
 942         }
 943
 944         /**
 945          * Set session data
 946          *
 947          * @param string $key Name of key in $_SESSION
 948          * @param mixed $data
 949          */
 950         public function setSessionData( $key, $data ) {
 951                 $_SESSION[$key] = $data;
 952         }
 953
 954         /**
 955          * Check if Internet Explorer will detect an incorrect cache extension in
 956          * PATH_INFO or QUERY_STRING. If the request can't be allowed, show an error
 957          * message or redirect to a safer URL. Returns true if the URL is OK, and
 958          * false if an error message has been shown and the request should be aborted.
 959          *
 960          * @param array $extWhitelist
 961          * @throws HttpError
 962          * @return bool
 963          */
 964         public function checkUrlExtension( $extWhitelist = array() ) {
 965                 global $wgScriptExtension;
 966                 $extWhitelist[] = ltrim( $wgScriptExtension, '.' );
 967                 if ( IEUrlExtension::areServerVarsBad( $_SERVER, $extWhitelist ) ) {
 968                         if ( !$this->wasPosted() ) {
 969                                 $newUrl = IEUrlExtension::fixUrlForIE6(
 970                                         $this->getFullRequestURL(), $extWhitelist );
 971                                 if ( $newUrl !== false ) {
 972                                         $this->doSecurityRedirect( $newUrl );
 973                                         return false;
 974                                 }
 975                         }
 976                         throw new HttpError( 403,
 977                                 'Invalid file extension found in the path info or query string.' );
 978                 }
 979                 return true;
 980         }
 981
 982         /**
 983          * Attempt to redirect to a URL with a QUERY_STRING that's not dangerous in
 984          * IE 6. Returns true if it was successful, false otherwise.
 985          *
 986          * @param string $url
 987          * @return bool
 988          */
 989         protected function doSecurityRedirect( $url ) {
 990                 header( 'Location: ' . $url );
 991                 header( 'Content-Type: text/html' );
 992                 $encUrl = htmlspecialchars( $url );
 993                 echo <<<HTML
 994 <html>
 995 <head>
 996 <title>Security redirect</title>
 997 </head>
 998 <body>
 999 <h1>Security redirect</h1>
1000 <p>
1001 We can't serve non-HTML content from the URL you have requested, because
1002 Internet Explorer would interpret it as an incorrect and potentially dangerous
1003 content type.</p>
1004 <p>Instead, please use <a href="$encUrl">this URL</a>, which is the same as the
1005 URL you have requested, except that "&amp;*" is appended. This prevents Internet
1006 Explorer from seeing a bogus file extension.
1007 </p>
1008 </body>
1009 </html>
1010 HTML;
1011                 echo "\n";
1012                 return true;
1013         }
1014
1015         /**
1016          * Parse the Accept-Language header sent by the client into an array
1017          *
1018          * @return array Array( languageCode => q-value ) sorted by q-value in
1019          *   descending order then appearing time in the header in ascending order.
1020          * May contain the "language" '*', which applies to languages other than those explicitly listed.
1021          * This is aligned with rfc2616 section 14.4
1022          * Preference for earlier languages appears in rfc3282 as an extension to HTTP/1.1.
1023          */
1024         public function getAcceptLang() {
1025                 // Modified version of code found at
1026                 // http://www.thefutureoftheweb.com/blog/use-accept-language-header
1027                 $acceptLang = $this->getHeader( 'Accept-Language' );
1028                 if ( !$acceptLang ) {
1029                         return array();
1030                 }
1031
1032                 // Return the language codes in lower case
1033                 $acceptLang = strtolower( $acceptLang );
1034
1035                 // Break up string into pieces (languages and q factors)
1036                 $lang_parse = null;
1037                 preg_match_all(
1038                         '/([a-z]{1,8}(-[a-z]{1,8})*|\*)\s*(;\s*q\s*=\s*(1(\.0{0,3})?|0(\.[0-9]{0,3})?)?)?/',
1039                         $acceptLang,
1040                         $lang_parse
1041                 );
1042
1043                 if ( !count( $lang_parse[1] ) ) {
1044                         return array();
1045                 }
1046
1047                 $langcodes = $lang_parse[1];
1048                 $qvalues = $lang_parse[4];
1049                 $indices = range( 0, count( $lang_parse[1] ) - 1 );
1050
1051                 // Set default q factor to 1
1052                 foreach ( $indices as $index ) {
1053                         if ( $qvalues[$index] === '' ) {
1054                                 $qvalues[$index] = 1;
1055                         } elseif ( $qvalues[$index] == 0 ) {
1056                                 unset( $langcodes[$index], $qvalues[$index], $indices[$index] );
1057                         }
1058                 }
1059
1060                 // Sort list. First by $qvalues, then by order. Reorder $langcodes the same way
1061                 array_multisort( $qvalues, SORT_DESC, SORT_NUMERIC, $indices, $langcodes );
1062
1063                 // Create a list like "en" => 0.8
1064                 $langs = array_combine( $langcodes, $qvalues );
1065
1066                 return $langs;
1067         }
1068
1069         /**
1070          * Fetch the raw IP from the request
1071          *
1072          * @since 1.19
1073          *
1074          * @throws MWException
1075          * @return string
1076          */
1077         protected function getRawIP() {
1078                 if ( !isset( $_SERVER['REMOTE_ADDR'] ) ) {
1079                         return null;
1080                 }
1081
1082                 if ( is_array( $_SERVER['REMOTE_ADDR'] ) || strpos( $_SERVER['REMOTE_ADDR'], ',' ) !== false ) {
1083                         throw new MWException( __METHOD__
1084                                 . " : Could not determine the remote IP address due to multiple values." );
1085                 } else {
1086                         $ipchain = $_SERVER['REMOTE_ADDR'];
1087                 }
1088
1089                 return IP::canonicalize( $ipchain );
1090         }
1091
1092         /**
1093          * Work out the IP address based on various globals
1094          * For trusted proxies, use the XFF client IP (first of the chain)
1095          *
1096          * @since 1.19
1097          *
1098          * @throws MWException
1099          * @return string
1100          */
1101         public function getIP() {
1102                 global $wgUsePrivateIPs;
1103
1104                 # Return cached result
1105                 if ( $this->ip !== null ) {
1106                         return $this->ip;
1107                 }
1108
1109                 # collect the originating ips
1110                 $ip = $this->getRawIP();
1111                 if ( !$ip ) {
1112                         throw new MWException( 'Unable to determine IP.' );
1113                 }
1114
1115                 # Append XFF
1116                 $forwardedFor = $this->getHeader( 'X-Forwarded-For' );
1117                 if ( $forwardedFor !== false ) {
1118                         $isConfigured = IP::isConfiguredProxy( $ip );
1119                         $ipchain = array_map( 'trim', explode( ',', $forwardedFor ) );
1120                         $ipchain = array_reverse( $ipchain );
1121                         array_unshift( $ipchain, $ip );
1122
1123                         # Step through XFF list and find the last address in the list which is a
1124                         # trusted server. Set $ip to the IP address given by that trusted server,
1125                         # unless the address is not sensible (e.g. private). However, prefer private
1126                         # IP addresses over proxy servers controlled by this site (more sensible).
1127                         # Note that some XFF values might be "unknown" with Squid/Varnish.
1128                         foreach ( $ipchain as $i => $curIP ) {
1129                                 $curIP = IP::sanitizeIP( IP::canonicalize( $curIP ) );
1130                                 if ( !$curIP || !isset( $ipchain[$i + 1] ) || $ipchain[$i + 1] === 'unknown'
1131                                         || !IP::isTrustedProxy( $curIP )
1132                                 ) {
1133                                         break; // IP is not valid/trusted or does not point to anything
1134                                 }
1135                                 if (
1136                                         IP::isPublic( $ipchain[$i + 1] ) ||
1137                                         $wgUsePrivateIPs ||
1138                                         IP::isConfiguredProxy( $curIP ) // bug 48919; treat IP as sane
1139                                 ) {
1140                                         // Follow the next IP according to the proxy
1141                                         $nextIP = IP::canonicalize( $ipchain[$i + 1] );
1142                                         if ( !$nextIP && $isConfigured ) {
1143                                                 // We have not yet made it past CDN/proxy servers of this site,
1144                                                 // so either they are misconfigured or there is some IP spoofing.
1145                                                 throw new MWException( "Invalid IP given in XFF '$forwardedFor'." );
1146                                         }
1147                                         $ip = $nextIP;
1148                                         // keep traversing the chain
1149                                         continue;
1150                                 }
1151                                 break;
1152                         }
1153                 }
1154
1155                 # Allow extensions to improve our guess
1156                 Hooks::run( 'GetIP', array( &$ip ) );
1157
1158                 if ( !$ip ) {
1159                         throw new MWException( "Unable to determine IP." );
1160                 }
1161
1162                 wfDebug( "IP: $ip\n" );
1163                 $this->ip = $ip;
1164                 return $ip;
1165         }
1166
1167         /**
1168          * @param string $ip
1169          * @return void
1170          * @since 1.21
1171          */
1172         public function setIP( $ip ) {
1173                 $this->ip = $ip;
1174         }
1175 }
1176
1177 /**
1178  * Object to access the $_FILES array
1179  */
1180 class WebRequestUpload {
1181         protected $request;
1182         protected $doesExist;
1183         protected $fileInfo;
1184
1185         /**
1186          * Constructor. Should only be called by WebRequest
1187          *
1188          * @param WebRequest $request The associated request
1189          * @param string $key Key in $_FILES array (name of form field)
1190          */
1191         public function __construct( $request, $key ) {
1192                 $this->request = $request;
1193                 $this->doesExist = isset( $_FILES[$key] );
1194                 if ( $this->doesExist ) {
1195                         $this->fileInfo = $_FILES[$key];
1196                 }
1197         }
1198
1199         /**
1200          * Return whether a file with this name was uploaded.
1201          *
1202          * @return bool
1203          */
1204         public function exists() {
1205                 return $this->doesExist;
1206         }
1207
1208         /**
1209          * Return the original filename of the uploaded file
1210          *
1211          * @return string|null Filename or null if non-existent
1212          */
1213         public function getName() {
1214                 if ( !$this->exists() ) {
1215                         return null;
1216                 }
1217
1218                 global $wgContLang;
1219                 $name = $this->fileInfo['name'];
1220
1221                 # Safari sends filenames in HTML-encoded Unicode form D...
1222                 # Horrid and evil! Let's try to make some kind of sense of it.
1223                 $name = Sanitizer::decodeCharReferences( $name );
1224                 $name = $wgContLang->normalize( $name );
1225                 wfDebug( __METHOD__ . ": {$this->fileInfo['name']} normalized to '$name'\n" );
1226                 return $name;
1227         }
1228
1229         /**
1230          * Return the file size of the uploaded file
1231          *
1232          * @return int File size or zero if non-existent
1233          */
1234         public function getSize() {
1235                 if ( !$this->exists() ) {
1236                         return 0;
1237                 }
1238
1239                 return $this->fileInfo['size'];
1240         }
1241
1242         /**
1243          * Return the path to the temporary file
1244          *
1245          * @return string|null Path or null if non-existent
1246          */
1247         public function getTempName() {
1248                 if ( !$this->exists() ) {
1249                         return null;
1250                 }
1251
1252                 return $this->fileInfo['tmp_name'];
1253         }
1254
1255         /**
1256          * Return the upload error. See link for explanation
1257          * http://www.php.net/manual/en/features.file-upload.errors.php
1258          *
1259          * @return int One of the UPLOAD_ constants, 0 if non-existent
1260          */
1261         public function getError() {
1262                 if ( !$this->exists() ) {
1263                         return 0; # UPLOAD_ERR_OK
1264                 }
1265
1266                 return $this->fileInfo['error'];
1267         }
1268
1269         /**
1270          * Returns whether this upload failed because of overflow of a maximum set
1271          * in php.ini
1272          *
1273          * @return bool
1274          */
1275         public function isIniSizeOverflow() {
1276                 if ( $this->getError() == UPLOAD_ERR_INI_SIZE ) {
1277                         # PHP indicated that upload_max_filesize is exceeded
1278                         return true;
1279                 }
1280
1281                 $contentLength = $this->request->getHeader( 'CONTENT_LENGTH' );
1282                 if ( $contentLength > wfShorthandToInteger( ini_get( 'post_max_size' ) ) ) {
1283                         # post_max_size is exceeded
1284                         return true;
1285                 }
1286
1287                 return false;
1288         }
1289 }
1290
1291 /**
1292  * WebRequest clone which takes values from a provided array.
1293  *
1294  * @ingroup HTTP
1295  */
1296 class FauxRequest extends WebRequest {
1297         private $wasPosted = false;
1298         private $session = array();
1299         private $requestUrl;
1300         protected $cookies = array();
1301
1302         /**
1303          * @param array $data Array of *non*-urlencoded key => value pairs, the
1304          *   fake GET/POST values
1305          * @param bool $wasPosted Whether to treat the data as POST
1306          * @param array|null $session Session array or null
1307          * @param string $protocol 'http' or 'https'
1308          * @throws MWException
1309          */
1310         public function __construct( $data = array(), $wasPosted = false,
1311                 $session = null, $protocol = 'http'
1312         ) {
1313                 $this->requestTime = microtime( true );
1314
1315                 if ( is_array( $data ) ) {
1316                         $this->data = $data;
1317                 } else {
1318                         throw new MWException( "FauxRequest() got bogus data" );
1319                 }
1320                 $this->wasPosted = $wasPosted;
1321                 if ( $session ) {
1322                         $this->session = $session;
1323                 }
1324                 $this->protocol = $protocol;
1325         }
1326
1327         /**
1328          * Initialise the header list
1329          */
1330         protected function initHeaders() {
1331                 // Nothing to init
1332         }
1333
1334         /**
1335          * @param string $name
1336          * @param string $default
1337          * @return string
1338          */
1339         public function getText( $name, $default = '' ) {
1340                 # Override; don't recode since we're using internal data
1341                 return (string)$this->getVal( $name, $default );
1342         }
1343
1344         /**
1345          * @return array
1346          */
1347         public function getValues() {
1348                 return $this->data;
1349         }
1350
1351         /**
1352          * @return array
1353          */
1354         public function getQueryValues() {
1355                 if ( $this->wasPosted ) {
1356                         return array();
1357                 } else {
1358                         return $this->data;
1359                 }
1360         }
1361
1362         public function getMethod() {
1363                 return $this->wasPosted ? 'POST' : 'GET';
1364         }
1365
1366         /**
1367          * @return bool
1368          */
1369         public function wasPosted() {
1370                 return $this->wasPosted;
1371         }
1372
1373         public function getCookie( $key, $prefix = null, $default = null ) {
1374                 if ( $prefix === null ) {
1375                         global $wgCookiePrefix;
1376                         $prefix = $wgCookiePrefix;
1377                 }
1378                 $name = $prefix . $key;
1379                 return isset( $this->cookies[$name] ) ? $this->cookies[$name] : $default;
1380         }
1381
1382         /**
1383          * @since 1.26
1384          * @param string $name Unprefixed name of the cookie to set
1385          * @param string|null $value Value of the cookie to set
1386          * @param string|null $prefix Cookie prefix. Defaults to $wgCookiePrefix
1387          */
1388         public function setCookie( $key, $value, $prefix = null ) {
1389                 $this->setCookies( array( $key => $value ), $prefix );
1390         }
1391
1392         /**
1393          * @since 1.26
1394          * @param array $cookies
1395          * @param string|null $prefix Cookie prefix. Defaults to $wgCookiePrefix
1396          */
1397         public function setCookies( $cookies, $prefix = null ) {
1398                 if ( $prefix === null ) {
1399                         global $wgCookiePrefix;
1400                         $prefix = $wgCookiePrefix;
1401                 }
1402                 foreach ( $cookies as $key => $value ) {
1403                         $name = $prefix . $key;
1404                         $this->cookies[$name] = $value;
1405                 }
1406         }
1407
1408         public function checkSessionCookie() {
1409                 return false;
1410         }
1411
1412         public function setRequestURL( $url ) {
1413                 $this->requestUrl = $url;
1414         }
1415
1416         public function getRequestURL() {
1417                 if ( $this->requestUrl === null ) {
1418                         throw new MWException( 'Request URL not set' );
1419                 }
1420                 return $this->requestUrl;
1421         }
1422
1423         public function getProtocol() {
1424                 return $this->protocol;
1425         }
1426
1427         /**
1428          * @param string $name
1429          * @param string $val
1430          */
1431         public function setHeader( $name, $val ) {
1432                 $this->setHeaders( array( $name => $val ) );
1433         }
1434
1435         /**
1436          * @since 1.26
1437          * @param array $headers
1438          */
1439         public function setHeaders( $headers ) {
1440                 foreach ( $headers as $name => $val ) {
1441                         $name = strtoupper( $name );
1442                         $this->headers[$name] = $val;
1443                 }
1444         }
1445
1446         /**
1447          * @param string $key
1448          * @return array|null
1449          */
1450         public function getSessionData( $key ) {
1451                 if ( isset( $this->session[$key] ) ) {
1452                         return $this->session[$key];
1453                 }
1454                 return null;
1455         }
1456
1457         /**
1458          * @param string $key
1459          * @param array $data
1460          */
1461         public function setSessionData( $key, $data ) {
1462                 $this->session[$key] = $data;
1463         }
1464
1465         /**
1466          * @return array|mixed|null
1467          */
1468         public function getSessionArray() {
1469                 return $this->session;
1470         }
1471
1472         /**
1473          * FauxRequests shouldn't depend on raw request data (but that could be implemented here)
1474          * @return string
1475          */
1476         public function getRawQueryString() {
1477                 return '';
1478         }
1479
1480         /**
1481          * FauxRequests shouldn't depend on raw request data (but that could be implemented here)
1482          * @return string
1483          */
1484         public function getRawPostString() {
1485                 return '';
1486         }
1487
1488         /**
1489          * FauxRequests shouldn't depend on raw request data (but that could be implemented here)
1490          * @return string
1491          */
1492         public function getRawInput() {
1493                 return '';
1494         }
1495
1496         /**
1497          * @param array $extWhitelist
1498          * @return bool
1499          */
1500         public function checkUrlExtension( $extWhitelist = array() ) {
1501                 return true;
1502         }
1503
1504         /**
1505          * @return string
1506          */
1507         protected function getRawIP() {
1508                 return '127.0.0.1';
1509         }
1510 }
1511
1512 /**
1513  * Similar to FauxRequest, but only fakes URL parameters and method
1514  * (POST or GET) and use the base request for the remaining stuff
1515  * (cookies, session and headers).
1516  *
1517  * @ingroup HTTP
1518  * @since 1.19
1519  */
1520 class DerivativeRequest extends FauxRequest {
1521         private $base;
1522
1523         /**
1524          * @param WebRequest $base
1525          * @param array $data Array of *non*-urlencoded key => value pairs, the
1526          *   fake GET/POST values
1527          * @param bool $wasPosted Whether to treat the data as POST
1528          */
1529         public function __construct( WebRequest $base, $data, $wasPosted = false ) {
1530                 $this->base = $base;
1531                 parent::__construct( $data, $wasPosted );
1532         }
1533
1534         public function getCookie( $key, $prefix = null, $default = null ) {
1535                 return $this->base->getCookie( $key, $prefix, $default );
1536         }
1537
1538         public function checkSessionCookie() {
1539                 return $this->base->checkSessionCookie();
1540         }
1541
1542         public function getHeader( $name, $flags = 0 ) {
1543                 return $this->base->getHeader( $name, $flags );
1544         }
1545
1546         public function getAllHeaders() {
1547                 return $this->base->getAllHeaders();
1548         }
1549
1550         public function getSessionData( $key ) {
1551                 return $this->base->getSessionData( $key );
1552         }
1553
1554         public function setSessionData( $key, $data ) {
1555                 $this->base->setSessionData( $key, $data );
1556         }
1557
1558         public function getAcceptLang() {
1559                 return $this->base->getAcceptLang();
1560         }
1561
1562         public function getIP() {
1563                 return $this->base->getIP();
1564         }
1565
1566         public function getProtocol() {
1567                 return $this->base->getProtocol();
1568         }
1569
1570         public function getElapsedTime() {
1571                 return $this->base->getElapsedTime();
1572         }
1573 }