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
  41                 $oldid = $this->mRequest->getInt( 'oldid' );
  42                 switch ( $wgRequest->getText( 'direction' ) ) {
  43                         case 'next':
  44                                 # output next revision, or nothing if there isn't one
  45                                 if ( $oldid ) {
  46                                         $oldid = $this->mTitle->getNextRevisionId( $oldid );
  47                                 }
  48                                 $oldid = $oldid ? $oldid : -1;
  49                                 break;
  50                         case 'prev':
  51                                 # output previous revision, or nothing if there isn't one
  52                                 if ( ! $oldid ) {
  53                                         # get the current revision so we can get the penultimate one
  54                                         $this->mArticle->getTouched();
  55                                         $oldid = $this->mArticle->mLatest;
  56                                 }
  57                                 $prev = $this->mTitle->getPreviousRevisionId( $oldid );
  58                                 $oldid = $prev ? $prev : -1 ;
  59                                 break;
  60                         case 'cur':
  61                                 $oldid = 0;
  62                                 break;
  63                 }
  64                 $this->mOldId = $oldid;
  65
  66                 # special case for 'generated' raw things: user css/js
  67                 $gen = $this->mRequest->getVal( 'gen' );
  68
  69                 if($gen == 'css') {
  70                         $this->mGen = $gen;
  71                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  72                         if($ctype == '') $ctype = 'text/css';
  73                 } elseif ($gen == 'js') {
  74                         $this->mGen = $gen;
  75                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  76                         if($ctype == '') $ctype = $wgJsMimeType;
  77                 } else {
  78                         $this->mGen = false;
  79                 }
  80                 $this->mCharset = $wgInputEncoding;
  81                 $this->mSmaxage = intval( $smaxage );
  82                 $this->mMaxage = $maxage;
  83                 if ( $ctype == '' or ! in_array( $ctype, $allowedCTypes ) ) {
  84                         $this->mContentType = 'text/x-wiki';
  85                 } else {
  86                         $this->mContentType = $ctype;
  87                 }
  88         }
  89
  90         function view() {
  91                 global $wgOut, $wgScript;
  92
  93                 if( isset( $_SERVER['SCRIPT_URL'] ) ) {
  94                         # Normally we use PHP_SELF to get the URL to the script
  95                         # as it was called, minus the query string.
  96                         #
  97                         # Some sites use Apache rewrite rules to handle subdomains,
  98                         # and have PHP set up in a weird way that causes PHP_SELF
  99                         # to contain the rewritten URL instead of the one that the
 100                         # outside world sees.
 101                         #
 102                         # If in this mode, use SCRIPT_URL instead, which mod_rewrite
 103                         # provides containing the "before" URL.
 104                         $url = $_SERVER['SCRIPT_URL'];
 105                 } else {
 106                         $url = $_SERVER['PHP_SELF'];
 107                 }
 108
 109                 $ua = @$_SERVER['HTTP_USER_AGENT'];
 110                 if( strcmp( $wgScript, $url ) && strpos( $ua, 'MSIE' ) !== false ) {
 111                         # Internet Explorer will ignore the Content-Type header if it
 112                         # thinks it sees a file extension it recognizes. Make sure that
 113                         # all raw requests are done through the script node, which will
 114                         # have eg '.php' and should remain safe.
 115                         #
 116                         # We used to redirect to a canonical-form URL as a general
 117                         # backwards-compatibility / good-citizen nice thing. However
 118                         # a lot of servers are set up in buggy ways, resulting in
 119                         # redirect loops which hang the browser until the CSS load
 120                         # times out.
 121                         #
 122                         # Just return a 403 Forbidden and get it over with.
 123                         wfHttpError( 403, 'Forbidden',
 124                                 'Raw pages must be accessed through the primary script entry point.' );
 125                         return;
 126                 }
 127
 128                 header( "Content-type: ".$this->mContentType.'; charset='.$this->mCharset );
 129                 # allow the client to cache this for 24 hours
 130                 header( 'Cache-Control: s-maxage='.$this->mSmaxage.', max-age='.$this->mMaxage );
 131                 echo $this->getRawText();
 132                 $wgOut->disable();
 133         }
 134
 135         function getRawText() {
 136                 global $wgUser, $wgOut;
 137                 if($this->mGen) {
 138                         $sk = $wgUser->getSkin();
 139                         $sk->initPage($wgOut);
 140                         if($this->mGen == 'css') {
 141                                 return $sk->getUserStylesheet();
 142                         } else if($this->mGen == 'js') {
 143                                 return $sk->getUserJs();
 144                         }
 145                 } else {
 146                         return $this->getArticleText();
 147                 }
 148         }
 149
 150         function getArticleText() {
 151                 $found = false;
 152                 $text = '';
 153                 if( $this->mTitle ) {
 154                         // If it's a MediaWiki message we can just hit the message cache
 155                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI && !$this->mOldId ) {
 156                                 $key = $this->mTitle->getDBkey();
 157                                 $text = wfMsgForContentNoTrans( $key );
 158                                 # If the message doesn't exist, return a blank
 159                                 if( $text == '&lt;' . $key . '&gt;' )
 160                                         $text = '';
 161                                 $found = true;
 162                         } else {
 163                                 // Get it from the DB
 164                                 $rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
 165                                 if ( $rev ) {
 166                                         $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
 167                                         header( "Last-modified: $lastmod" );
 168                                         $text = $rev->getText();
 169                                         $found = true;
 170                                 }
 171                         }
 172                 }
 173
 174                 # Bad title or page does not exist
 175                 if( !$found && $this->mContentType == 'text/x-wiki' ) {
 176                         # Don't return a 404 response for CSS or JavaScript;
 177                         # 404s aren't generally cached and it would create
 178                         # extra hits when user CSS/JS are on and the user doesn't
 179                         # have the pages.
 180                         header( "HTTP/1.0 404 Not Found" );
 181                 }
 182
 183                 return $this->parseArticleText( $text );
 184         }
 185
 186         function parseArticleText( $text ) {
 187                 if ( $text === '' )
 188                         return '';
 189                 else
 190                         if ( $this->mExpandTemplates ) {
 191                                 global $wgTitle;
 192
 193                                 $parser = new Parser();
 194                                 $parser->Options( new ParserOptions() ); // We don't want this to be user-specific
 195                                 $parser->Title( $wgTitle );
 196                                 $parser->OutputType( OT_HTML );
 197
 198                                 return $parser->replaceVariables( $text );
 199                         } else
 200                                 return $text;
 201         }
 202 }
 203 ?>