includes/RawPage.php

   1 <?php
   2 /**
   3  * Copyright (C) 2004 Gabriel Wicke <wicke@wikidev.net>
   4  * http://wikidev.net/
   5  * Based on PageHistory and SpecialExport
   6  *
   7  * License: GPL (http://www.gnu.org/copyleft/gpl.html)
   8  *
   9  * @author Gabriel Wicke <wicke@wikidev.net>
  10  * @package MediaWiki
  11  */
  12
  13 /**
  14  * @todo document
  15  * @package MediaWiki
  16  */
  17 class RawPage {
  18         var $mArticle, $mTitle, $mRequest;
  19         var $mOldId, $mGen, $mCharset;
  20         var $mSmaxage, $mMaxage;
  21         var $mContentType, $mExpandTemplates;
  22
  23         function RawPage( &$article, $request = false ) {
  24                 global $wgRequest, $wgInputEncoding, $wgSquidMaxage, $wgJsMimeType;
  25
  26                 $allowedCTypes = array('text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit');
  27                 $this->mArticle =& $article;
  28                 $this->mTitle =& $article->mTitle;
  29
  30                 if ( $request === false ) {
  31                         $this->mRequest =& $wgRequest;
  32                 } else {
  33                         $this->mRequest = $request;
  34                 }
  35
  36                 $ctype = $this->mRequest->getVal( 'ctype' );
  37                 $smaxage = $this->mRequest->getIntOrNull( 'smaxage', $wgSquidMaxage );
  38                 $maxage = $this->mRequest->getInt( 'maxage', $wgSquidMaxage );
  39                 $this->mExpandTemplates = $this->mRequest->getVal( 'templates' ) === 'expand';
  40                 $this->mUseMessageCache = $this->mRequest->getBool( 'usemsgcache' );
  41
  42                 $oldid = $this->mRequest->getInt( 'oldid' );
  43                 switch ( $wgRequest->getText( 'direction' ) ) {
  44                         case 'next':
  45                                 # output next revision, or nothing if there isn't one
  46                                 if ( $oldid ) {
  47                                         $oldid = $this->mTitle->getNextRevisionId( $oldid );
  48                                 }
  49                                 $oldid = $oldid ? $oldid : -1;
  50                                 break;
  51                         case 'prev':
  52                                 # output previous revision, or nothing if there isn't one
  53                                 if ( ! $oldid ) {
  54                                         # get the current revision so we can get the penultimate one
  55                                         $this->mArticle->getTouched();
  56                                         $oldid = $this->mArticle->mLatest;
  57                                 }
  58                                 $prev = $this->mTitle->getPreviousRevisionId( $oldid );
  59                                 $oldid = $prev ? $prev : -1 ;
  60                                 break;
  61                         case 'cur':
  62                                 $oldid = 0;
  63                                 break;
  64                 }
  65                 $this->mOldId = $oldid;
  66
  67                 # special case for 'generated' raw things: user css/js
  68                 $gen = $this->mRequest->getVal( 'gen' );
  69
  70                 if($gen == 'css') {
  71                         $this->mGen = $gen;
  72                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  73                         if($ctype == '') $ctype = 'text/css';
  74                 } elseif ($gen == 'js') {
  75                         $this->mGen = $gen;
  76                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  77                         if($ctype == '') $ctype = $wgJsMimeType;
  78                 } else {
  79                         $this->mGen = false;
  80                 }
  81                 $this->mCharset = $wgInputEncoding;
  82                 $this->mSmaxage = intval( $smaxage );
  83                 $this->mMaxage = $maxage;
  84                 if ( $ctype == '' or ! in_array( $ctype, $allowedCTypes ) ) {
  85                         $this->mContentType = 'text/x-wiki';
  86                 } else {
  87                         $this->mContentType = $ctype;
  88                 }
  89         }
  90
  91         function view() {
  92                 global $wgOut, $wgScript;
  93
  94                 if( isset( $_SERVER['SCRIPT_URL'] ) ) {
  95                         # Normally we use PHP_SELF to get the URL to the script
  96                         # as it was called, minus the query string.
  97                         #
  98                         # Some sites use Apache rewrite rules to handle subdomains,
  99                         # and have PHP set up in a weird way that causes PHP_SELF
 100                         # to contain the rewritten URL instead of the one that the
 101                         # outside world sees.
 102                         #
 103                         # If in this mode, use SCRIPT_URL instead, which mod_rewrite
 104                         # provides containing the "before" URL.
 105                         $url = $_SERVER['SCRIPT_URL'];
 106                 } else {
 107                         $url = $_SERVER['PHP_SELF'];
 108                 }
 109
 110                 $ua = @$_SERVER['HTTP_USER_AGENT'];
 111                 if( strcmp( $wgScript, $url ) && strpos( $ua, 'MSIE' ) !== false ) {
 112                         # Internet Explorer will ignore the Content-Type header if it
 113                         # thinks it sees a file extension it recognizes. Make sure that
 114                         # all raw requests are done through the script node, which will
 115                         # have eg '.php' and should remain safe.
 116                         #
 117                         # We used to redirect to a canonical-form URL as a general
 118                         # backwards-compatibility / good-citizen nice thing. However
 119                         # a lot of servers are set up in buggy ways, resulting in
 120                         # redirect loops which hang the browser until the CSS load
 121                         # times out.
 122                         #
 123                         # Just return a 403 Forbidden and get it over with.
 124                         wfHttpError( 403, 'Forbidden',
 125                                 'Raw pages must be accessed through the primary script entry point.' );
 126                         return;
 127                 }
 128
 129                 header( "Content-type: ".$this->mContentType.'; charset='.$this->mCharset );
 130                 # allow the client to cache this for 24 hours
 131                 header( 'Cache-Control: s-maxage='.$this->mSmaxage.', max-age='.$this->mMaxage );
 132                 echo $this->getRawText();
 133                 $wgOut->disable();
 134         }
 135
 136         function getRawText() {
 137                 global $wgUser, $wgOut;
 138                 if($this->mGen) {
 139                         $sk = $wgUser->getSkin();
 140                         $sk->initPage($wgOut);
 141                         if($this->mGen == 'css') {
 142                                 return $sk->getUserStylesheet();
 143                         } else if($this->mGen == 'js') {
 144                                 return $sk->getUserJs();
 145                         }
 146                 } else {
 147                         return $this->getArticleText();
 148                 }
 149         }
 150
 151         function getArticleText() {
 152                 $found = false;
 153                 $text = '';
 154                 if( $this->mTitle ) {
 155                         // If it's a MediaWiki message we can just hit the message cache
 156                         if ( $this->mUseMessageCache && $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 157                                 $key = $this->mTitle->getDBkey();
 158                                 $text = wfMsgForContentNoTrans( $key );
 159                                 # If the message doesn't exist, return a blank
 160                                 if( wfEmptyMsg( $key, $text ) )
 161                                         $text = '';
 162                                 $found = true;
 163                         } else {
 164                                 // Get it from the DB
 165                                 $rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
 166                                 if ( $rev ) {
 167                                         $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
 168                                         header( "Last-modified: $lastmod" );
 169                                         $text = $rev->getText();
 170                                         $found = true;
 171                                 }
 172                         }
 173                 }
 174
 175                 # Bad title or page does not exist
 176                 if( !$found && $this->mContentType == 'text/x-wiki' ) {
 177                         # Don't return a 404 response for CSS or JavaScript;
 178                         # 404s aren't generally cached and it would create
 179                         # extra hits when user CSS/JS are on and the user doesn't
 180                         # have the pages.
 181                         header( "HTTP/1.0 404 Not Found" );
 182                 }
 183
 184                 return $this->parseArticleText( $text );
 185         }
 186
 187         function parseArticleText( $text ) {
 188                 if ( $text === '' )
 189                         return '';
 190                 else
 191                         if ( $this->mExpandTemplates ) {
 192                                 global $wgParser;
 193                                 return $wgParser->preprocess( $text, $this->mTitle, new ParserOptions() );
 194                         } else
 195                                 return $text;
 196         }
 197 }
 198 ?>