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