includes/StreamFile.php

   1 <?php
   2 /** */
   3
   4 /** */
   5 function wfStreamFile( $fname ) {
   6         global $wgSquidMaxage;
   7         $stat = stat( $fname );
   8         if ( !$stat ) {
   9                 header( 'HTTP/1.0 404 Not Found' );
  10                 echo "<html><body>
  11 <h1>File not found</h1>
  12 <p>Although this PHP script ({$_SERVER['SCRIPT_NAME']}) exists, the file requested for output
  13 does not.</p>
  14 </body></html>";
  15                 return;
  16         }
  17
  18         header( "Cache-Control: s-maxage=$wgSquidMaxage, must-revalidate, max-age=0" );
  19         header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $stat['mtime'] ) . ' GMT' );
  20
  21         if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
  22                 $modsince = preg_replace( '/;.*$/', '', $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
  23                 $sinceTime = strtotime( $modsince );
  24                 if ( $stat['mtime'] <= $sinceTime ) {
  25                         header( "HTTP/1.0 304 Not Modified" );
  26                         return;
  27                 }
  28         }
  29
  30         header( 'Content-Length: ' . $stat['size'] );
  31
  32         $type = wfGetType( $fname );
  33         if ( $type and $type!="unknown/unknown") {
  34                 header("Content-type: $type");
  35         } else {
  36                 header('Content-type: application/x-wiki');
  37         }
  38
  39         readfile( $fname );
  40 }
  41
  42 /** */
  43 function wfGetType( $filename ) {
  44         global $wgTrivialMimeDetection;
  45
  46         # trivial detection by file extension,
  47         # used for thumbnails (thumb.php)
  48         if ($wgTrivialMimeDetection) {
  49                 $ext= strtolower(strrchr($filename, '.'));
  50
  51                 switch ($ext) {
  52                         case '.gif': return 'image/gif';
  53                         case '.png': return 'image/png';
  54                         case '.jpg': return 'image/jpeg';
  55                         case '.jpeg': return 'image/jpeg';
  56                 }
  57
  58                 return 'unknown/unknown';
  59         }
  60         else {
  61                 $magic=& wfGetMimeMagic();
  62                 return $magic->guessMimeType($filename); //full fancy mime detection
  63         }
  64 }
  65
  66 ?>