michael@0: function handleRequest(request, response)
michael@0: {
michael@0:   var file;
michael@0:   getObjectState("SERVER_ROOT", function(serverRoot)
michael@0:   {
michael@0:     var ref = request.getHeader("Referer").split("?")[0];
michael@0:     // 8 is "https://".length which is the longest string before the host.
michael@0:     var pathStart = ref.indexOf("/", 8) + 1;
michael@0:     var pathEnd = ref.lastIndexOf("/") + 1;
michael@0:     file = serverRoot.getFile(ref.substring(pathStart, pathEnd) + "x");
michael@0:   });
michael@0: 
michael@0:   response.setHeader("Content-Type", "text/plain", false);
michael@0:   response.write(file.path.substr(0, file.path.length-1));
michael@0: }