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