includes/StreamFile.php

   1 <?php
   2 /** */
   3
   4 /** */
   5 function wfStreamFile( $fname ) {
   6         $stat = @stat( $fname );
   7         if ( !$stat ) {
   8                 header( 'HTTP/1.0 404 Not Found' );
   9                 header( 'Cache-Control: no-cache' );
  10                 header( 'Content-Type: text/html; charset=utf-8' );
  11                 $encFile = htmlspecialchars( $fname );
  12                 $encScript = htmlspecialchars( $_SERVER['SCRIPT_NAME'] );
  13                 echo "<html><body>
  14 <h1>File not found</h1>
  15 <p>Although this PHP script ($encScript) exists, the file requested for output
  16 ($encFile) does not.</p>
  17 </body></html>
  18 ";
  19                 return;
  20         }
  21
  22         header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $stat['mtime'] ) . ' GMT' );
  23
  24         // Cancel output buffering and gzipping if set
  25         wfResetOutputBuffers();
  26
  27         $type = wfGetType( $fname );
  28         if ( $type and $type!="unknown/unknown") {
  29                 header("Content-type: $type");
  30         } else {
  31                 header('Content-type: application/x-wiki');
  32         }
  33
  34         if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
  35                 $modsince = preg_replace( '/;.*$/', '', $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
  36                 $sinceTime = strtotime( $modsince );
  37                 if ( $stat['mtime'] <= $sinceTime ) {
  38                         header( "HTTP/1.0 304 Not Modified" );
  39                         return;
  40                 }
  41         }
  42
  43         header( 'Content-Length: ' . $stat['size'] );
  44
  45         readfile( $fname );
  46 }
  47
  48 /** */
  49 function wfGetType( $filename ) {
  50         global $wgTrivialMimeDetection;
  51
  52         # trivial detection by file extension,
  53         # used for thumbnails (thumb.php)
  54         if ($wgTrivialMimeDetection) {
  55                 $ext= strtolower(strrchr($filename, '.'));
  56
  57                 switch ($ext) {
  58                         case '.gif': return 'image/gif';
  59                         case '.png': return 'image/png';
  60                         case '.jpg': return 'image/jpeg';
  61                         case '.jpeg': return 'image/jpeg';
  62                 }
  63
  64                 return 'unknown/unknown';
  65         }
  66         else {
  67                 $magic=& MimeMagic::singleton();
  68                 return $magic->guessMimeType($filename); //full fancy mime detection
  69         }
  70 }
  71
  72 ?>