includes/actions/RawAction.php

   1 <?php
   2 /**
   3  * Raw page text accessor
   4  *
   5  * Copyright © 2004 Gabriel Wicke <wicke@wikidev.net>
   6  * http://wikidev.net/
   7  *
   8  * Based on HistoryPage and SpecialExport
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  *
  25  * @author Gabriel Wicke <wicke@wikidev.net>
  26  * @file
  27  */
  28
  29 /**
  30  * A simple method to retrieve the plain source of an article,
  31  * using "action=raw" in the GET request string.
  32  */
  33 class RawAction extends FormlessAction {
  34         private $mGen;
  35
  36         public function getName() {
  37                 return 'raw';
  38         }
  39
  40         public function requiresWrite() {
  41                 return false;
  42         }
  43
  44         public function requiresUnblock() {
  45                 return false;
  46         }
  47
  48         function onView() {
  49                 global $wgSquidMaxage, $wgForcedRawSMaxage, $wgJsMimeType;
  50
  51                 $this->getOutput()->disable();
  52                 $request = $this->getRequest();
  53
  54                 if ( !$request->checkUrlExtension() ) {
  55                         return;
  56                 }
  57
  58                 if ( $this->getOutput()->checkLastModified( $this->page->getTouched() ) ) {
  59                         return; // Client cache fresh and headers sent, nothing more to do.
  60                 }
  61
  62                 # special case for 'generated' raw things: user css/js
  63                 # This is deprecated and will only return empty content
  64                 $gen = $request->getVal( 'gen' );
  65                 $smaxage = $request->getIntOrNull( 'smaxage' );
  66
  67                 if ( $gen == 'css' || $gen == 'js' ) {
  68                         $this->mGen = $gen;
  69                         if ( $smaxage === null ) {
  70                                 $smaxage = $wgSquidMaxage;
  71                         }
  72                 } else {
  73                         $this->mGen = false;
  74                 }
  75
  76                 $contentType = $this->getContentType();
  77
  78                 # Force caching for CSS and JS raw content, default: 5 minutes
  79                 if ( $smaxage === null ) {
  80                         if ( $contentType == 'text/css' || $contentType == $wgJsMimeType ) {
  81                                 $smaxage = intval( $wgForcedRawSMaxage );
  82                         } else {
  83                                 $smaxage = 0;
  84                         }
  85                 }
  86
  87                 $maxage = $request->getInt( 'maxage', $wgSquidMaxage );
  88
  89                 $response = $request->response();
  90
  91                 $response->header( 'Content-type: ' . $contentType . '; charset=UTF-8' );
  92                 # Output may contain user-specific data;
  93                 # vary generated content for open sessions on private wikis
  94                 $privateCache = !User::groupHasPermission( '*', 'read' ) && ( $smaxage == 0 || session_id() != '' );
  95                 # allow the client to cache this for 24 hours
  96                 $mode = $privateCache ? 'private' : 'public';
  97                 $response->header( 'Cache-Control: ' . $mode . ', s-maxage=' . $smaxage . ', max-age=' . $maxage );
  98
  99                 $text = $this->getRawText();
 100
 101                 if ( $text === false && $contentType == 'text/x-wiki' ) {
 102                         # Don't return a 404 response for CSS or JavaScript;
 103                         # 404s aren't generally cached and it would create
 104                         # extra hits when user CSS/JS are on and the user doesn't
 105                         # have the pages.
 106                         $response->header( 'HTTP/1.x 404 Not Found' );
 107                 }
 108
 109                 if ( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
 110                         wfDebug( __METHOD__ . ": RawPageViewBeforeOutput hook broke raw page output.\n" );
 111                 }
 112
 113                 echo $text;
 114         }
 115
 116         /**
 117          * Get the text that should be returned, or false if the page or revision
 118          * was not found.
 119          *
 120          * @return String|Bool
 121          */
 122         public function getRawText() {
 123                 global $wgParser;
 124
 125                 # No longer used
 126                 if( $this->mGen ) {
 127                         return '';
 128                 }
 129
 130                 $text = false;
 131                 $title = $this->getTitle();
 132                 $request = $this->getRequest();
 133
 134                 // If it's a MediaWiki message we can just hit the message cache
 135                 if ( $request->getBool( 'usemsgcache' ) && $title->getNamespace() == NS_MEDIAWIKI ) {
 136                         // The first "true" is to use the database, the second is to use the content langue
 137                         // and the last one is to specify the message key already contains the language in it ("/de", etc.)
 138                         $text = MessageCache::singleton()->get( $title->getDBkey(), true, true, true );
 139                         // If the message doesn't exist, return a blank
 140                         if ( $text === false ) {
 141                                 $text = '';
 142                         }
 143                 } else {
 144                         // Get it from the DB
 145                         $rev = Revision::newFromTitle( $title, $this->getOldId() );
 146                         if ( $rev ) {
 147                                 $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
 148                                 $request->response()->header( "Last-modified: $lastmod" );
 149
 150                                 // Public-only due to cache headers
 151                                 $content = $rev->getContent();
 152
 153                                 if ( $content === null ) {
 154                                         // revision not found (or suppressed)
 155                                         $text = false;
 156                                 } elseif ( !$content instanceof TextContent ) {
 157                                         // non-text content
 158                                         wfHttpError( 415, "Unsupported Media Type", "The requested page uses the content model `"
 159                                                                                 . $content->getModel() . "` which is not supported via this interface." );
 160                                         die();
 161                                 } else {
 162                                         // want a section?
 163                                         $section = $request->getIntOrNull( 'section' );
 164                                         if ( $section !== null ) {
 165                                                 $content = $content->getSection( $section );
 166                                         }
 167
 168                                         if ( $content === null || $content === false ) {
 169                                                 // section not found (or section not supported, e.g. for JS and CSS)
 170                                                 $text = false;
 171                                         } else {
 172                                                 $text = $content->getNativeData();
 173                                         }
 174                                 }
 175                         }
 176                 }
 177
 178                 if ( $text !== false && $text !== '' && $request->getVal( 'templates' ) === 'expand' ) {
 179                         $text = $wgParser->preprocess( $text, $title, ParserOptions::newFromContext( $this->getContext() ) );
 180                 }
 181
 182                 return $text;
 183         }
 184
 185         /**
 186          * Get the ID of the revision that should used to get the text.
 187          *
 188          * @return Integer
 189          */
 190         public function getOldId() {
 191                 $oldid = $this->getRequest()->getInt( 'oldid' );
 192                 switch ( $this->getRequest()->getText( 'direction' ) ) {
 193                         case 'next':
 194                                 # output next revision, or nothing if there isn't one
 195                                 if( $oldid ) {
 196                                         $oldid = $this->getTitle()->getNextRevisionId( $oldid );
 197                                 }
 198                                 $oldid = $oldid ? $oldid : -1;
 199                                 break;
 200                         case 'prev':
 201                                 # output previous revision, or nothing if there isn't one
 202                                 if( !$oldid ) {
 203                                         # get the current revision so we can get the penultimate one
 204                                         $oldid = $this->page->getLatest();
 205                                 }
 206                                 $prev = $this->getTitle()->getPreviousRevisionId( $oldid );
 207                                 $oldid = $prev ? $prev : -1 ;
 208                                 break;
 209                         case 'cur':
 210                                 $oldid = 0;
 211                                 break;
 212                 }
 213                 return $oldid;
 214         }
 215
 216         /**
 217          * Get the content type to use for the response
 218          *
 219          * @return String
 220          */
 221         public function getContentType() {
 222                 global $wgJsMimeType;
 223
 224                 $ctype = $this->getRequest()->getVal( 'ctype' );
 225
 226                 if ( $ctype == '' ) {
 227                         $gen = $this->getRequest()->getVal( 'gen' );
 228                         if ( $gen == 'js' ) {
 229                                 $ctype = $wgJsMimeType;
 230                         } elseif ( $gen == 'css' ) {
 231                                 $ctype = 'text/css';
 232                         }
 233                 }
 234
 235                 $allowedCTypes = array( 'text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit' );
 236                 if ( $ctype == '' || !in_array( $ctype, $allowedCTypes ) ) {
 237                         $ctype = 'text/x-wiki';
 238                 }
 239
 240                 return $ctype;
 241         }
 242 }
 243
 244 /**
 245  * Backward compatibility for extensions
 246  *
 247  * @deprecated in 1.19
 248  */
 249 class RawPage extends RawAction {
 250         public $mOldId;
 251
 252         function __construct( Page $page, $request = false ) {
 253                 wfDeprecated( __CLASS__, '1.19' );
 254                 parent::__construct( $page );
 255
 256                 if ( $request !== false ) {
 257                         $context = new DerivativeContext( $this->getContext() );
 258                         $context->setRequest( $request );
 259                         $this->context = $context;
 260                 }
 261         }
 262
 263         public function view() {
 264                 $this->onView();
 265         }
 266
 267         public function getOldId() {
 268                 # Some extensions like to set $mOldId
 269                 if ( $this->mOldId !== null ) {
 270                         return $this->mOldId;
 271                 }
 272                 return parent::getOldId();
 273         }
 274 }