code-boxx/0-NODE-P2P.MD

## 0-NODE-P2P.MD

      
    Raw
  

              0-NODE-P2P.MD
            
          
    NODEJS PEER TO PEER

https://code-boxx.com/simple-webrtc-javascript-nodejs/
NOTES


Run unpack.bat (Windows) unpack.sh (Linux/Mac). This will automatically:

Install required modules - npm i express peer
Start the Express and Peer server - node 1-server.js.


Access http://localhost/a in your browser, open the developer's console.
Open another tab or use another browser, access http://localhost/b - This will send a direct P2P message to http://localhost/a.

LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-server.js
// (A) REQUIRED MODULES
// npm install express peer
const express = require("express"),
      path = require("path"),
      { PeerServer } = require("peer");

// (B) EXPRESS SERVER
// http://localhost/a
// http://localhost/b
const app = express();
app.get("/a", (req, res) => res.sendFile(path.join(__dirname, "2-peer-a.html")));
app.get("/b", (req, res) => res.sendFile(path.join(__dirname, "3-peer-b.html")));
app.listen(80);

// (C) PEER SERVER
// http://localhost:9000/myapp
const peerServer = PeerServer({
  port: 9000,
  path: "/myapp"
});

## 2-peer-a.html
<!DOCTYPE html>
<html>
  <head>
    <title>WEBRTC (Peer To Peer)</title>
  </head>
  <body>
    <!-- (A) LOAD PEERJS -->
    <script src="https://unpkg.com/peerjs@1.4.7/dist/peerjs.min.js"></script>

    <!-- (B) PEER-TO-PEER -->
    <script>
    // (B1) HANDSHAKE WITH PEER SERVER
    const peer = new Peer("PEER-A", {
      host: "localhost",
      port: 9000,
      path: "/myapp"
    });

    // (B2) READY
    peer.on("open", id => console.log("Your ID is " + id));

    // (B3) ON RECEIVING MESSAGE FROM OTHER PEERS
    peer.on("connection", conn => {
      conn.on("data", data => console.log(data));
      // conn.close();
    });
    </script>
  </body>
</html>

## 3-peer-b.html
<!DOCTYPE html>
<html>
  <head>
    <title>WEBRTC (Peer To Peer)</title>
  </head>
  <body>
    <!-- (A) LOAD PEERJS -->
    <script src="https://unpkg.com/peerjs@1.4.7/dist/peerjs.min.js"></script>

    <!-- (B) PEER-TO-PEER -->
    <script>
    // (B1) HANDSHAKE WITH PEER SERVER
    const peer = new Peer("PEERB", {
      host: "localhost",
      port: 9000,
      path: "/myapp"
    });

    // (B2) READY - CONNECT & SEND MESSAGE TO PEER A
    peer.on("open", id => {
      console.log("Your ID is " + id);
      var conn = peer.connect("PEER-A");
      conn.on("open", () => conn.send("Hi from PEER-B!"));
    });
    </script>
  </body>
</html>

## unpack.bat
call npm i express peer
node 1-server.js

## unpack.sh
source "npm i express peer"
node ./1-server.js
	// (A) REQUIRED MODULES
	// npm install express peer
	const express = require("express"),
	path = require("path"),
	{ PeerServer } = require("peer");

	// (B) EXPRESS SERVER
	// http://localhost/a
	// http://localhost/b
	const app = express();
	app.get("/a", (req, res) => res.sendFile(path.join(__dirname, "2-peer-a.html")));
	app.get("/b", (req, res) => res.sendFile(path.join(__dirname, "3-peer-b.html")));
	app.listen(80);

	// (C) PEER SERVER
	// http://localhost:9000/myapp
	const peerServer = PeerServer({
	port: 9000,
	path: "/myapp"
	});
	<!DOCTYPE html>
	<html>
	<head>
	<title>WEBRTC (Peer To Peer)</title>
	</head>
	<body>
	<!-- (A) LOAD PEERJS -->
	<script src="https://unpkg.com/peerjs@1.4.7/dist/peerjs.min.js"></script>

	<!-- (B) PEER-TO-PEER -->
	<script>
	// (B1) HANDSHAKE WITH PEER SERVER
	const peer = new Peer("PEER-A", {
	host: "localhost",
	port: 9000,
	path: "/myapp"
	});

	// (B2) READY
	peer.on("open", id => console.log("Your ID is " + id));

	// (B3) ON RECEIVING MESSAGE FROM OTHER PEERS
	peer.on("connection", conn => {
	conn.on("data", data => console.log(data));
	// conn.close();
	});
	</script>
	</body>
	</html>