The Tor Browser / file revision

 function parseQuery(request, key) {

   var params = request.queryString.split('&');

   for (var j = 0; j < params.length; ++j) {

     var p = params[j];

 	if (p == key)

 	  return true;

     if (p.indexOf(key + "=") == 0)

 	  return p.substring(key.length + 1);

 	if (p.indexOf("=") < 0 && key == "")

 	  return p;

   }

   return false;

 }

 // Return seek.ogv file content for the first request with a given key.

 // All subsequent requests return a redirect to a different-origin resource.

 function handleRequest(request, response)

 {

   var key = parseQuery(request, "key");

   var resource = parseQuery(request, "res");

   if (getState(key) == "redirect") {

     var origin = request.host == "mochi.test" ? "example.org" : "mochi.test:8888";

     response.setStatusLine(request.httpVersion, 303, "See Other");

     response.setHeader("Location", "http://" + origin + "/tests/content/media/test/" + resource);

     response.setHeader("Content-Type", "text/html");

     return;

   }

   setState(key, "redirect");

   var file = Components.classes["@mozilla.org/file/directory_service;1"].

                         getService(Components.interfaces.nsIProperties).

                         get("CurWorkD", Components.interfaces.nsILocalFile);

   var fis  = Components.classes['@mozilla.org/network/file-input-stream;1'].

                         createInstance(Components.interfaces.nsIFileInputStream);

   var bis  = Components.classes["@mozilla.org/binaryinputstream;1"].

                         createInstance(Components.interfaces.nsIBinaryInputStream);

   var paths = "tests/content/media/test/" + resource;

   var split = paths.split("/");

   for(var i = 0; i < split.length; ++i) {

     file.append(split[i]);

   }

   fis.init(file, -1, -1, false);

   dump("file=" + file + "\n");

   bis.setInputStream(fis);

   var bytes = bis.readBytes(bis.available());

   response.setStatusLine(request.httpVersion, 206, "Partial Content");

   response.setHeader("Content-Range", "bytes 0-" + (bytes.length - 1) + "/" + bytes.length);

   response.setHeader("Content-Length", ""+bytes.length, false);

   response.setHeader("Content-Type", "video/ogg", false);

   response.write(bytes, bytes.length);

   bis.close();

 }