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main.js
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var path = require("path");
var util = require("util");
var async = require("async");
var _ = require("underscore");
var modules_dir = "modules";
var scraper = require(path.join(__dirname, modules_dir, "scraper"));
var history = require(path.join(__dirname, modules_dir, "history"));
// ----------------------------------------------------------------------------
var CURRENT = {"current": {"cities": [], "parkings": []}};
function onScrape(callback) {
util.log("Scraping...");
scraper.scrape(function (err, result) {
if (typeof err !== "undefined" && err !== null) {
util.log("" + err);
}
if (typeof result !== "undefined" && result !== null) {
CURRENT = result;
if (!CURRENT.hasOwnProperty("current")) {
return;
} else {
if (!CURRENT.current.hasOwnProperty("parkings")) {
return;
}
}
util.log("#" + CURRENT.current.parkings.length + " parkings returned.");
// Send data to connected clients via web-socket
updateClients();
if (callback && typeof callback === "function") callback();
}
});
}
function onHistory() {
var parkings;
if (!CURRENT.hasOwnProperty("current")) {
return;
} else {
if (!CURRENT.current.hasOwnProperty("parkings")) {
return;
}
}
util.log("Storing history data...");
parkings = CURRENT.current.parkings;
util.log(JSON.stringify(CURRENT.current.parkings));
if (typeof parkings !== "undefined" && parkings !== null) {
history.storeHistory(parkings, function () {
util.log("#" + parkings.length + " parkings historized.");
});
}
}
var scrapeDelay = 2 * 60 * 1000;
setInterval(onScrape, scrapeDelay);
var historyDelay = 20 * 60 * 1000;
setInterval(onHistory, historyDelay);
// ----------------------------------------------------------------------------
var http = require("http");
var express = require("express");
var app = express();
var host = "0.0.0.0";
var port = 1337;
var server = http.createServer(app);
var sockjs = require('sockjs');
var sockjsServer = sockjs.createServer();
sockjsServer.installHandlers(server, {prefix: '/data'});
console.log(' [*] Listening on ' + host + ':' + port);
server.listen(port, host);
/*
* Manage web-socket connections.
*/
var CONNECTED_CLIENTS = [];
sockjsServer.on('connection', function (connection) {
CONNECTED_CLIENTS.push(connection);
connection.on('data', function (data) {
util.log("Received data: " + JSON.stringify(data));
});
});
function updateClients() {
var clientsToNotify = _.clone(CONNECTED_CLIENTS);
async.forEach(
clientsToNotify,
function (client, done) {
util.log("emit to client " + client.id);
try {
client.write(JSON.stringify(CURRENT));
} catch (err) {
done(err);
}
done(null);
},
function (err) {
if (typeof err !== "undefined" && err !== null) {
util.log(err);
} else {
util.log("done emitting data to all clients");
}
}
);
}
// ----------------------------------------------------------------------------
app.configure(function () {
app.use(app.router);
app.use(express.static(__dirname + "/public"));
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
/**
* Route mobile devices to the mobile page and "normal" browsers to the desktop page.
*/
app.get("/", function (req, res) {
var ua = req.headers['user-agent'].toLowerCase();
if (/android.+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(ua) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|e\-|e\/|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|xda(\-|2|g)|yas\-|your|zeto|zte\-/i.test(ua.substr(0, 4))) {
res.writeHead(302, {Location: '/mobile'});
res.end();
} else {
res.writeHead(302, {Location: '/desktop'});
res.end();
}
});
app.get("/json/current", function (req, res) {
console.time("Delivered: /json/current");
if (typeof CURRENT === "undefined" || CURRENT === null) {
res.send("Derzeit keine Daten verfügbar.", 404);
} else {
res.json(CURRENT);
}
console.timeEnd("Delivered: /json/current");
util.log("Answered request from: " + (req.header("host")));
});
app.get("/json/history/:name", function (req, res) {
var name, feedback;
name = req.params["name"];
console.time("Delivered: /json/history/" + name);
history.findTimelineByName(name, function (timeline, spaces) {
feedback = {
"name": name,
"spaces": spaces,
"timeline": timeline
};
if (typeof timeline !== "undefined" && timeline !== null && timeline.length > 0) {
res.json(feedback);
} else {
res.send("Derzeit keine Daten für Parkplatz \"" + name + "\" verfügbar.", 404);
}
console.timeEnd("Delivered: /json/history/" + name);
});
});
onScrape(onHistory);