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 require_once( 'Revision.php' );
  15
  16 /**
  17  * @todo document
  18  * @package MediaWiki
  19  */
  20 class RawPage {
  21         var $mArticle, $mTitle, $mRequest;
  22         var $mOldId, $mGen, $mCharset;
  23         var $mSmaxage, $mMaxage;
  24         var $mContentType, $mExpandTemplates;
  25
  26         function RawPage( &$article, $request = false ) {
  27                 global $wgRequest, $wgInputEncoding, $wgSquidMaxage, $wgJsMimeType;
  28
  29                 $allowedCTypes = array('text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit');
  30                 $this->mArticle =& $article;
  31                 $this->mTitle =& $article->mTitle;
  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', $wgSquidMaxage );
  41                 $maxage = $this->mRequest->getInt( 'maxage', $wgSquidMaxage );
  42                 $this->mExpandTemplates = $this->mRequest->getVal( 'templates' ) === 'expand';
  43
  44                 $oldid = $this->mRequest->getInt( 'oldid' );
  45                 switch ( $wgRequest->getText( 'direction' ) ) {
  46                         case 'next':
  47                                 # output next revision, or nothing if there isn't one
  48                                 if ( $oldid ) {
  49                                         $oldid = $this->mTitle->getNextRevisionId( $oldid );
  50                                 }
  51                                 $oldid = $oldid ? $oldid : -1;
  52                                 break;
  53                         case 'prev':
  54                                 # output previous revision, or nothing if there isn't one
  55                                 if ( ! $oldid ) {
  56                                         # get the current revision so we can get the penultimate one
  57                                         $this->mArticle->getTouched();
  58                                         $oldid = $this->mArticle->mLatest;
  59                                 }
  60                                 $prev = $this->mTitle->getPreviousRevisionId( $oldid );
  61                                 $oldid = $prev ? $prev : -1 ;
  62                                 break;
  63                         case 'cur':
  64                                 $oldid = 0;
  65                                 break;
  66                 }
  67                 $this->mOldId = $oldid;
  68
  69                 # special case for 'generated' raw things: user css/js
  70                 $gen = $this->mRequest->getVal( 'gen' );
  71
  72                 if($gen == 'css') {
  73                         $this->mGen = $gen;
  74                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  75                         if($ctype == '') $ctype = 'text/css';
  76                 } elseif ($gen == 'js') {
  77                         $this->mGen = $gen;
  78                         if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
  79                         if($ctype == '') $ctype = $wgJsMimeType;
  80                 } else {
  81                         $this->mGen = false;
  82                 }
  83                 $this->mCharset = $wgInputEncoding;
  84                 $this->mSmaxage = intval( $smaxage );
  85                 $this->mMaxage = $maxage;
  86                 if ( $ctype == '' or ! in_array( $ctype, $allowedCTypes ) ) {
  87                         $this->mContentType = 'text/x-wiki';
  88                 } else {
  89                         $this->mContentType = $ctype;
  90                 }
  91         }
  92
  93         function view() {
  94                 global $wgOut, $wgScript;
  95
  96                 if( isset( $_SERVER['SCRIPT_URL'] ) ) {
  97                         # Normally we use PHP_SELF to get the URL to the script
  98                         # as it was called, minus the query string.
  99                         #
 100                         # Some sites use Apache rewrite rules to handle subdomains,
 101                         # and have PHP set up in a weird way that causes PHP_SELF
 102                         # to contain the rewritten URL instead of the one that the
 103                         # outside world sees.
 104                         #
 105                         # If in this mode, use SCRIPT_URL instead, which mod_rewrite
 106                         # provides containing the "before" URL.
 107                         $url = $_SERVER['SCRIPT_URL'];
 108                 } else {
 109                         $url = $_SERVER['PHP_SELF'];
 110                 }
 111
 112                 $ua = @$_SERVER['HTTP_USER_AGENT'];
 113                 if( strcmp( $wgScript, $url ) && strpos( $ua, 'MSIE' ) !== false ) {
 114                         # Internet Explorer will ignore the Content-Type header if it
 115                         # thinks it sees a file extension it recognizes. Make sure that
 116                         # all raw requests are done through the script node, which will
 117                         # have eg '.php' and should remain safe.
 118                         #
 119                         # We used to redirect to a canonical-form URL as a general
 120                         # backwards-compatibility / good-citizen nice thing. However
 121                         # a lot of servers are set up in buggy ways, resulting in
 122                         # redirect loops which hang the browser until the CSS load
 123                         # times out.
 124                         #
 125                         # Just return a 403 Forbidden and get it over with.
 126                         wfHttpError( 403, 'Forbidden',
 127                                 'Raw pages must be accessed through the primary script entry point.' );
 128                         return;
 129                 }
 130
 131                 header( "Content-type: ".$this->mContentType.'; charset='.$this->mCharset );
 132                 # allow the client to cache this for 24 hours
 133                 header( 'Cache-Control: s-maxage='.$this->mSmaxage.', max-age='.$this->mMaxage );
 134                 echo $this->getRawText();
 135                 $wgOut->disable();
 136         }
 137
 138         function getRawText() {
 139                 global $wgUser, $wgOut;
 140                 if($this->mGen) {
 141                         $sk = $wgUser->getSkin();
 142                         $sk->initPage($wgOut);
 143                         if($this->mGen == 'css') {
 144                                 return $sk->getUserStylesheet();
 145                         } else if($this->mGen == 'js') {
 146                                 return $sk->getUserJs();
 147                         }
 148                 } else {
 149                         return $this->getArticleText();
 150                 }
 151         }
 152
 153         function getArticleText() {
 154                 if( $this->mTitle ) {
 155                         $text = '';
 156
 157                         // If it's a MediaWiki message we can just hit the message cache
 158                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 159                                 $text = wfMsgForContentNoTrans( $this->mTitle->getDbkey() );
 160                         } else {
 161                                 // Get it from the DB
 162                                 $rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
 163                                 if ( $rev ) {
 164                                         $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
 165                                         header( "Last-modified: $lastmod" );
 166                                         $text = $rev->getText();
 167                                 } else
 168                                         $text = '';
 169                         }
 170
 171                         return $this->parseArticleText( $text );
 172                 }
 173
 174                 # Bad title or page does not exist
 175                 if( $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                 return '';
 183         }
 184
 185         function parseArticleText( $text ) {
 186                 if ( $text === '' )
 187                         return '';
 188                 else
 189                         if ( $this->mExpandTemplates ) {
 190                                 global $wgTitle;
 191
 192                                 $parser = new Parser();
 193                                 $parser->Options( new ParserOptions() ); // We don't want this to be user-specific
 194                                 $parser->Title( $wgTitle );
 195                                 $parser->OutputType( OT_HTML );
 196
 197                                 return $parser->replaceVariables( $text );
 198                         } else
 199                                 return $text;
 200         }
 201 }
 202 ?>