michael@0: function parseQueryString(str)
michael@0: {
michael@0:   if (str == "")
michael@0:     return {};
michael@0: 
michael@0:   var paramArray = str.split("&");
michael@0:   var regex = /^([^=]+)=(.*)$/;
michael@0:   var params = {};
michael@0:   for (var i = 0, sz = paramArray.length; i < sz; i++)
michael@0:   {
michael@0:     var match = regex.exec(paramArray[i]);
michael@0:     if (!match)
michael@0:       throw "Bad parameter in queryString!  '" + paramArray[i] + "'";
michael@0:     params[decodeURIComponent(match[1])] = decodeURIComponent(match[2]);
michael@0:   }
michael@0: 
michael@0:   return params;
michael@0: }
michael@0: 
michael@0: function getPosition(action)
michael@0: {  
michael@0:   var response = {
michael@0:     status: "OK",
michael@0:     location: {
michael@0:       lat: 37.41857,
michael@0:       lng: -122.08769,
michael@0:     },
michael@0:     accuracy: (action == "worse-accuracy") ? 100 : 42,
michael@0:   };
michael@0:   
michael@0:   return JSON.stringify(response);
michael@0: }
michael@0: 
michael@0: var timer;
michael@0: function handleRequest(request, response)
michael@0: {
michael@0:   var params = parseQueryString(request.queryString);
michael@0: 
michael@0:   if (params.action == "stop-responding") {
michael@0:       response.processAsync();
michael@0:       return;
michael@0:   }
michael@0: 
michael@0:   var position = getPosition(params.action);
michael@0: 
michael@0:   if (params.action == "respond-garbage") {
michael@0:      // better way?
michael@0:     var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
michael@0:     position = "";
michael@0:     var len = Math.floor(Math.random() * 5000);
michael@0: 
michael@0:     for (var i=0; i< len; i++) {
michael@0:         var c = Math.floor(Math.random() * chars.length);
michael@0:         position += chars.substring(c, c+1);
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   var response;
michael@0:   response.processAsync();
michael@0:   response.setStatusLine("1.0", 200, "OK");
michael@0:   response.setHeader("Cache-Control", "no-cache", false);
michael@0:   response.setHeader("Content-Type", "aplication/x-javascript", false);
michael@0: 
michael@0:   var delay = 0;
michael@0:   if ('delay' in params) {
michael@0:     delay = params.delay;
michael@0:   }
michael@0:   if (params.action === "send404") {
michael@0:     response.setStatusLine("1.0", 404, "Not Found");
michael@0:     position = '';
michael@0:   }
michael@0:   timer = Components.classes["@mozilla.org/timer;1"].createInstance(Components.interfaces.nsITimer);
michael@0:   timer.initWithCallback(function() {
michael@0:     response.write(position);
michael@0:     response.finish();
michael@0:   }, delay, timer.TYPE_ONE_SHOT);
michael@0: }
michael@0: