includes/StreamFile.php

   1 <?php
   2
   3 function wfStreamFile( $fname ) {
   4         global $wgSquidMaxage;
   5         $stat = stat( $fname );
   6         if ( !$stat ) {
   7                 header( 'HTTP/1.0 404 Not Found' );
   8                 echo "<html><body>
   9 <h1>File not found</h1>
  10 <p>Although this PHP script ({$_SERVER['SCRIPT_NAME']}) exists, the file requested for output
  11 does not.</p>
  12 </body></html>";
  13                 return;
  14         }
  15
  16         header( "Cache-Control: s-maxage=$wgSquidMaxage, must-revalidate, max-age=0" );
  17         header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $stat['mtime'] ) . ' GMT' );
  18
  19         if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
  20                 $modsince = preg_replace( '/;.*$/', '', $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
  21                 $sinceTime = strtotime( $modsince );
  22                 if ( $stat['mtime'] <= $sinceTime ) {
  23                         header( "HTTP/1.0 304 Not Modified" );
  24                         return;
  25                 }
  26         }
  27
  28         header( 'Content-Length: ' . $stat['size'] );
  29
  30         $type = wfGetType( $fname );
  31         if ( $type and $type!="unknown/unknown") {
  32                 header("Content-type: $type");
  33         } else {
  34                 header('Content-type: application/x-wiki');
  35         }
  36
  37         readfile( $fname );
  38 }
  39
  40 function wfGetType( $filename ) {
  41         global $wgTrivialMimeDetection;
  42
  43         # trivial detection by file extension,
  44         # used for thumbnails (thumb.php)
  45         if ($wgTrivialMimeDetection) {
  46                 $ext= strtolower(strrchr($filename, '.'));
  47
  48                 switch ($ext) {
  49                         case '.gif': return "image/gif";
  50                         case '.png': return "image/png";
  51                         case '.jpg': return "image/jpeg";
  52                         case '.jpeg': return "image/jpeg";
  53                 }
  54
  55                 return "unknown/unknown";
  56         }
  57         else {
  58                 $magic=& wfGetMimeMagic();
  59                 return $magic->guessMimeType($filename); //full fancy mime detection
  60         }
  61 }
  62
  63 ?>