includes/WebRequest.php

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