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