includes/WebRequest.php

   1 <?php
   2 # Deal with importing all those nasssty globals and things
   3 #
   4 # Copyright (C) 2003 Brion Vibber <brion@pobox.com>
   5 # http://www.mediawiki.org/
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License along
  18 # with this program; if not, write to the Free Software Foundation, Inc.,
  19 # 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20 # http://www.gnu.org/copyleft/gpl.html
  21
  22 # Hypothetically, we could use a WebRequest object to fake a
  23 # self-contained request.
  24
  25 ## Enable this to debug total elimination of register_globals
  26 #define( "DEBUG_GLOBALS", 1 );
  27
  28 class WebRequest {
  29         function WebRequest() {
  30                 if( defined('DEBUG_GLOBALS') ) error_reporting(E_ALL);
  31
  32                 $this->checkMagicQuotes();
  33                 $this->checkRegisterGlobals();
  34         }
  35
  36         function &fix_magic_quotes( &$arr ) {
  37                 foreach( $arr as $key => $val ) {
  38                         if( is_array( $val ) ) {
  39                                 $this->fix_magic_quotes( $arr[$key] );
  40                         } else {
  41                                 $arr[$key] = stripslashes( $val );
  42                         }
  43                 }
  44                 return $arr;
  45         }
  46
  47         function checkMagicQuotes() {
  48                 if ( get_magic_quotes_gpc() ) {
  49                         $this->fix_magic_quotes( $_COOKIE );
  50                         $this->fix_magic_quotes( $_ENV );
  51                         $this->fix_magic_quotes( $_GET );
  52                         $this->fix_magic_quotes( $_POST );
  53                         $this->fix_magic_quotes( $_REQUEST );
  54                         $this->fix_magic_quotes( $_SERVER );
  55                 } elseif( defined('DEBUG_GLOBALS') ) {
  56                         die("DEBUG_GLOBALS: turn on magic_quotes_gpc" );
  57                 }
  58         }
  59
  60         function checkRegisterGlobals() {
  61                 if( ini_get( "register_globals" ) ) {
  62                         if( defined( "DEBUG_GLOBALS" ) ) {
  63                                 die( "DEBUG_GLOBALS: Turn register_globals off!" );
  64                         }
  65                 } else {
  66                         if( !defined( "DEBUG_GLOBALS" ) ) {
  67                                 # Insecure, but at least it'll run
  68                                 import_request_variables( "GPC" );
  69                         }
  70                 }
  71         }
  72
  73         function getGPCVal( &$arr, $name, $default ) {
  74                 if( isset( $arr[$name] ) ) {
  75                         return $arr[$name];
  76                 } else {
  77                         return $default;
  78                 }
  79         }
  80
  81         function getGPCText( &$arr, $name, $default ) {
  82                 # Text fields may be in an alternate encoding which we should check.
  83                 # Also, strip CRLF line endings down to LF to achieve consistency.
  84                 global $wgLang;
  85                 if( isset( $arr[$name] ) ) {
  86                         return str_replace( "\r\n", "\n", $wgLang->recodeInput( $arr[$name] ) );
  87                 } else {
  88                         return $default;
  89                 }
  90         }
  91
  92         function getVal( $name, $default = NULL ) {
  93                 return $this->getGPCVal( $_REQUEST, $name, $default );
  94         }
  95
  96         function getInt( $name, $default = 0 ) {
  97                 return IntVal( $this->getVal( $name, $default ) );
  98         }
  99
 100         function getBool( $name, $default = false ) {
 101                 return $this->getVal( $name, $default ) ? true : false;
 102         }
 103
 104         function getCheck( $name ) {
 105                 # Checkboxes and buttons are only present when clicked
 106                 # Presence connotes truth, abscense false
 107                 $val = $this->getVal( $name, NULL );
 108                 return isset( $val );
 109         }
 110
 111         function getText( $name, $default = "" ) {
 112                 return $this->getGPCText( $_REQUEST, $name, $default );
 113         }
 114
 115         function getValues() {
 116                 $names = func_get_args();
 117                 $retVal = array();
 118                 foreach ( $names as $name ) {
 119                         $value = $this->getVal( $name );
 120                         if ( !is_null( $value ) ) {
 121                                 $retVal[$name] = $value;
 122                         }
 123                 }
 124                 return $retVal;
 125         }
 126
 127         function wasPosted() {
 128                 return $_SERVER['REQUEST_METHOD'] == 'POST';
 129         }
 130
 131         function checkSessionCookie() {
 132                 return isset( $_COOKIE[ini_get("session.name")] );
 133         }
 134
 135         function getRequestURL() {
 136                 return $_SERVER['REQUEST_URI'];
 137         }
 138
 139         function getFullRequestURL() {
 140                 global $wgServer;
 141                 return $wgServer . $this->getRequestURL();
 142         }
 143
 144         # Take an arbitrary query and rewrite the present URL to include it
 145         function appendQuery( $query ) {
 146                 global $wgTitle;
 147                 $basequery = "";
 148                 foreach( $_GET as $var => $val ) {
 149                         if( $var == "title" ) continue;
 150                         $basequery .= "&" . urlencode( $var ) . "=" . urlencode( $val );
 151                 }
 152                 $basequery .= "&" . $query;
 153
 154                 # Trim the extra &
 155                 $basequery = substr( $basequery, 1 );
 156                 return $wgTitle->getLocalURL( $basequery );
 157         }
 158
 159         function escapeAppendQuery( $query ) {
 160                 return htmlspecialchars( $this->appendQuery( $query ) );
 161         }
 162
 163 }
 164
 165 ?>