require("dotenv").config(); var sslRedirect = require("heroku-ssl-redirect"); var twilio = require("twilio")( process.env.TWILIO_ACCOUNT_SID, process.env.TWILIO_AUTH_TOKEN ); var express = require("express"); var app = express(); var http = require("http").createServer(app); var io = require("socket.io")(http); var path = require("path"); var public = path.join(__dirname, "public"); const url = require("url"); // enable ssl redirect app.use(sslRedirect()); // Remove trailing slashes in url app.use(function (req, res, next) { if (req.path.substr(-1) === "/" && req.path.length > 1) { let query = req.url.slice(req.path.length); res.redirect(301, req.path.slice(0, -1) + query); } else { next(); } }); app.get("/", function (req, res) { res.sendFile(path.join(public, "landing.html")); }); app.get("/pickname", function (req, res) { res.sendFile(path.join(public, "pickname.html")); }); app.get("/join/", function (req, res) { res.redirect("/"); }); app.get("/join/*", function (req, res) { if (Object.keys(req.query).length > 0) { logIt("redirect:" + req.url + " to " + url.parse(req.url).pathname); res.redirect(url.parse(req.url).pathname); } else { res.sendFile(path.join(public, "chat.html")); } }); app.get("/notsupported", function (req, res) { res.sendFile(path.join(public, "notsupported.html")); }); // Serve static files in the public directory app.use(express.static("public")); // Simple logging function to add room name function logIt(msg, room) { if (room) { console.log(room + ": " + msg); } else { console.log(msg); } } // When a socket connects, set up the specific listeners we will use. io.on("connection", function (socket) { // When a client tries to join a room, only allow them if they are first or // second in the room. Otherwise it is full. socket.on("join", function (room) { logIt("A client joined the room", room); var clients = io.sockets.adapter.rooms[room]; var numClients = typeof clients !== "undefined" ? clients.length : 0; if (numClients === 0) { socket.join(room); } else if (numClients === 1) { socket.join(room); // When the client is second to join the room, both clients are ready. logIt("Broadcasting ready message", room); // First to join call initiates call socket.broadcast.to(room).emit("willInitiateCall", room); socket.emit("ready", room).to(room); socket.broadcast.to(room).emit("ready", room); } else { logIt("room already full", room); socket.emit("full", room); } }); // When receiving the token message, use the Twilio REST API to request an // token to get ephemeral credentials to use the TURN server. socket.on("token", function (room) { logIt("Received token request", room); twilio.tokens.create(function (err, response) { if (err) { logIt(err, room); } else { logIt("Token generated. Returning it to the browser client", room); socket.emit("token", response).to(room); } }); }); // Relay candidate messages socket.on("candidate", function (candidate, room) { logIt("Received candidate. Broadcasting...", room); socket.broadcast.to(room).emit("candidate", candidate); }); // Relay offers socket.on("offer", function (offer, room) { logIt("Received offer. Broadcasting...", room); socket.broadcast.to(room).emit("offer", offer); }); // Relay answers socket.on("answer", function (answer, room) { logIt("Received answer. Broadcasting...", room); socket.broadcast.to(room).emit("answer", answer); }); }); // Listen for Heroku port, otherwise just use 3000 var port = process.env.PORT || 3000; http.listen(port, function () { console.log("http://localhost:" + port); });