thumb_handler.php

   1 <?php
   2
   3 # Valid web server entry point
   4 define( 'THUMB_HANDLER', true );
   5
   6 if ( $_SERVER['REQUEST_URI'] === $_SERVER['SCRIPT_NAME'] ) {
   7         # Directly requesting this script is not a use case.
   8         # Instead of giving a thumbnail error, give a generic 404.
   9         wfDisplay404Error(); // go away, nothing to see here
  10 } else {
  11         # Execute thumb.php, having set THUMB_HANDLER so that
  12         # it knows to extract params from a thumbnail file URL.
  13         require( dirname( __FILE__ ) . '/thumb.php' );
  14 }
  15
  16 /**
  17  * Print out a generic 404 error message
  18  *
  19  * @return void
  20  */
  21 function wfDisplay404Error() {
  22         header( 'HTTP/1.1 404 Not Found' );
  23         header( 'Content-Type: text/html;charset=utf-8' );
  24
  25         $prot = isset( $_SERVER['HTTPS'] ) ? "https://" : "http://";
  26         $serv = strlen( $_SERVER['HTTP_HOST'] ) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'];
  27         $loc = $_SERVER["REQUEST_URI"];
  28
  29         $encUrl = htmlspecialchars( $prot . $serv . $loc );
  30
  31         // Looks like a typical apache2 error
  32         $standard_404 = <<<ENDTEXT
  33 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
  34 <html><head>
  35 <title>404 Not Found</title>
  36 </head><body>
  37 <h1>Not Found</h1>
  38 <p>The requested URL $encUrl was not found on this server.</p>
  39 </body></html>
  40 ENDTEXT;
  41
  42         print $standard_404;
  43 }