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