56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
const express = require("express");
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const app = express();
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const http = require("http");
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const server = http.createServer(app);
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const { Server } = require("socket.io");
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const io = new Server(server);
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// Password setting via environment variable, defaulting to "secret"
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const BROADCASTER_PASSWORD = process.env.BROADCASTER_PASSWORD;
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let broadcasterSocketId = null;
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app.use(express.static("public"));
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io.on("connection", (socket) => {
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console.log("a user connected:", socket.id);
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// When the broadcaster starts sharing
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socket.on("broadcaster", (password) => {
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if (password !== BROADCASTER_PASSWORD) {
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socket.emit("authError", "Invalid broadcaster password.");
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return;
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}
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broadcasterSocketId = socket.id;
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socket.broadcast.emit("broadcaster");
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});
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// When a viewer joins
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socket.on("viewer", () => {
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socket.broadcast.emit("viewer", socket.id);
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});
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// WebRTC Signaling
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socket.on("offer", (id, message) => {
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if (socket.id !== broadcasterSocketId) return; // Prevent hijacking
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socket.to(id).emit("offer", socket.id, message);
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});
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socket.on("answer", (id, message) => {
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socket.to(id).emit("answer", socket.id, message);
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});
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socket.on("candidate", (id, message) => {
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socket.to(id).emit("candidate", socket.id, message);
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});
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socket.on("disconnect", () => {
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console.log("user disconnected", socket.id);
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socket.broadcast.emit("disconnectPeer", socket.id);
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});
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});
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const PORT = process.env.PORT || 3000;
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server.listen(PORT, () => {
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console.log(`listening on *:${PORT}`);
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});
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