includes/RawPage.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  * License: GPL (http://www.gnu.org/copyleft/gpl.html)
  11  *
  12  * @author Gabriel Wicke <wicke@wikidev.net>
  13  * @file
  14  */
  15
  16 /**
  17  * A simple method to retrieve the plain source of an article,
  18  * using "action=raw" in the GET request string.
  19  */
  20 class RawPage {
  21         var $mArticle, $mTitle, $mRequest;
  22         var $mOldId, $mGen, $mCharset, $mSection;
  23         var $mSmaxage, $mMaxage;
  24         var $mContentType, $mExpandTemplates;
  25
  26         function __construct( Page $article, $request = false ) {
  27                 global $wgRequest, $wgSquidMaxage, $wgJsMimeType, $wgGroupPermissions;
  28
  29                 $allowedCTypes = array( 'text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit' );
  30                 $this->mArticle = $article;
  31                 $this->mTitle = $article->getTitle();
  32
  33                 if( $request === false ) {
  34                         $this->mRequest = $wgRequest;
  35                 } else {
  36                         $this->mRequest = $request;
  37                 }
  38
  39                 $ctype = $this->mRequest->getVal( 'ctype' );
  40                 $smaxage = $this->mRequest->getIntOrNull( 'smaxage' );
  41                 $maxage = $this->mRequest->getInt( 'maxage', $wgSquidMaxage );
  42
  43                 $this->mExpandTemplates = $this->mRequest->getVal( 'templates' ) === 'expand';
  44                 $this->mUseMessageCache = $this->mRequest->getBool( 'usemsgcache' );
  45
  46                 $this->mSection = $this->mRequest->getIntOrNull( 'section' );
  47
  48                 $oldid = $this->mRequest->getInt( 'oldid' );
  49
  50                 switch( $wgRequest->getText( 'direction' ) ) {
  51                         case 'next':
  52                                 # output next revision, or nothing if there isn't one
  53                                 if( $oldid ) {
  54                                         $oldid = $this->mTitle->getNextRevisionId( $oldid );
  55                                 }
  56                                 $oldid = $oldid ? $oldid : -1;
  57                                 break;
  58                         case 'prev':
  59                                 # output previous revision, or nothing if there isn't one
  60                                 if( !$oldid ) {
  61                                         # get the current revision so we can get the penultimate one
  62                                         $this->mArticle->getTouched();
  63                                         $oldid = $this->mArticle->getLatest();
  64                                 }
  65                                 $prev = $this->mTitle->getPreviousRevisionId( $oldid );
  66                                 $oldid = $prev ? $prev : -1 ;
  67                                 break;
  68                         case 'cur':
  69                                 $oldid = 0;
  70                                 break;
  71                 }
  72                 $this->mOldId = $oldid;
  73
  74                 # special case for 'generated' raw things: user css/js
  75                 $gen = $this->mRequest->getVal( 'gen' );
  76
  77                 if( $gen == 'css' ) {
  78                         $this->mGen = $gen;
  79                         if( is_null( $smaxage ) ) {
  80                                 $smaxage = $wgSquidMaxage;
  81                         }
  82                         if( $ctype == '' ) {
  83                                 $ctype = 'text/css';
  84                         }
  85                 } elseif( $gen == 'js' ) {
  86                         $this->mGen = $gen;
  87                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  88                         if($ctype == '') $ctype = $wgJsMimeType;
  89                 } else {
  90                         $this->mGen = false;
  91                 }
  92                 $this->mCharset = 'UTF-8';
  93
  94                 # Force caching for CSS and JS raw content, default: 5 minutes
  95                 if( is_null( $smaxage ) && ( $ctype == 'text/css' || $ctype == $wgJsMimeType ) ) {
  96                         global $wgForcedRawSMaxage;
  97                         $this->mSmaxage = intval( $wgForcedRawSMaxage );
  98                 } else {
  99                         $this->mSmaxage = intval( $smaxage );
 100                 }
 101                 $this->mMaxage = $maxage;
 102
 103                 # Output may contain user-specific data;
 104                 # vary generated content for open sessions and private wikis
 105                 if( $this->mGen || !$wgGroupPermissions['*']['read'] ) {
 106                         $this->mPrivateCache = $this->mSmaxage == 0 || session_id() != '';
 107                 } else {
 108                         $this->mPrivateCache = false;
 109                 }
 110
 111                 if( $ctype == '' || !in_array( $ctype, $allowedCTypes ) ) {
 112                         $this->mContentType = 'text/x-wiki';
 113                 } else {
 114                         $this->mContentType = $ctype;
 115                 }
 116         }
 117
 118         function view() {
 119                 global $wgOut, $wgRequest;
 120
 121                 if( !$wgRequest->checkUrlExtension() ) {
 122                         $wgOut->disable();
 123                         return;
 124                 }
 125
 126                 header( 'Content-type: ' . $this->mContentType . '; charset=' . $this->mCharset );
 127                 # allow the client to cache this for 24 hours
 128                 $mode = $this->mPrivateCache ? 'private' : 'public';
 129                 header( 'Cache-Control: ' . $mode . ', s-maxage=' . $this->mSmaxage . ', max-age=' . $this->mMaxage );
 130
 131                 $text = $this->getRawText();
 132
 133                 if( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
 134                         wfDebug( __METHOD__ . ": RawPageViewBeforeOutput hook broke raw page output.\n" );
 135                 }
 136
 137                 echo $text;
 138                 $wgOut->disable();
 139         }
 140
 141         function getRawText() {
 142                 global $wgOut, $wgUser;
 143                 if( $this->mGen ) {
 144                         $sk = $wgUser->getSkin();
 145                         if( !StubObject::isRealObject( $wgOut ) ) {
 146                                 $wgOut->_unstub( 2 );
 147                         }
 148                         $sk->initPage( $wgOut );
 149                         if( $this->mGen == 'css' ) {
 150                                 return $sk->generateUserStylesheet();
 151                         } elseif( $this->mGen == 'js' ) {
 152                                 return $sk->generateUserJs();
 153                         }
 154                 } else {
 155                         return $this->getArticleText();
 156                 }
 157                 return '';
 158         }
 159
 160         function getArticleText() {
 161                 $found = false;
 162                 $text = '';
 163                 if( $this->mTitle ) {
 164                         // If it's a MediaWiki message we can just hit the message cache
 165                         if( $this->mUseMessageCache && $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 166                                 $key = $this->mTitle->getDBkey();
 167                                 $msg = wfMessage( $key )->inContentLanguage();
 168                                 # If the message doesn't exist, return a blank
 169                                 $text = !$msg->exists() ? '' : $msg->plain();
 170                                 $found = true;
 171                         } else {
 172                                 // Get it from the DB
 173                                 $rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
 174                                 if( $rev ) {
 175                                         $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
 176                                         header( "Last-modified: $lastmod" );
 177
 178                                         if( !is_null( $this->mSection ) ) {
 179                                                 global $wgParser;
 180                                                 $text = $wgParser->getSection( $rev->getText(), $this->mSection );
 181                                         } else {
 182                                                 $text = $rev->getText();
 183                                         }
 184                                         $found = true;
 185                                 }
 186                         }
 187                 }
 188
 189                 # Bad title or page does not exist
 190                 if( !$found && $this->mContentType == 'text/x-wiki' ) {
 191                         # Don't return a 404 response for CSS or JavaScript;
 192                         # 404s aren't generally cached and it would create
 193                         # extra hits when user CSS/JS are on and the user doesn't
 194                         # have the pages.
 195                         header( 'HTTP/1.0 404 Not Found' );
 196                 }
 197
 198                 return $this->parseArticleText( $text );
 199         }
 200
 201         /**
 202          * @param $text
 203          * @return string
 204          */
 205         function parseArticleText( $text ) {
 206                 if( $text === '' ) {
 207                         return '';
 208                 } else {
 209                         if( $this->mExpandTemplates ) {
 210                                 global $wgParser;
 211                                 return $wgParser->preprocess( $text, $this->mTitle, new ParserOptions() );
 212                         } else {
 213                                 return $text;
 214                         }
 215                 }
 216         }
 217 }