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initial rtc template, send text messages, doesn't work in firefox
This commit is contained in:
Abhinav Adduri
commit
002098f56e
8
README.md
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8
README.md
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* To run the code, clone the git repo, cd into the folder, and run npm install. Then, run npm install -g browserify. Then, run npm start. *
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Steps to start exchanging messages:
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* Open two separate tabs, one with a location hash of #init. For example, if the port being used is 3000, open one tab as http://localhost:3000/#init, and one as http://localhost:3000.
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* The tab with the location hash should have a button that says create channel. Click that button, and wait for an alert dialog to pop up (this might take a while).
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* In the tab without the init hash, paste the generated code in the input field with the join channel placeholder text.
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* Click connect in the tab without the init hash. Then, click connect in the tab with the init hash (order shouldn't actually matter). You should be able to send messages and see them in the other tab now.
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83
app.js
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83
app.js
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const express = require('express')
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const bodyParser = require('body-parser')
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const app = express()
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var redis = require("redis"),
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client = redis.createClient();
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client.on('error', function(err) {
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console.log(err);
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})
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app.use(bodyParser.json());
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app.use(express.static('public'))
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app.use(function(req, res, next) {
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res.header("Access-Control-Allow-Origin", "*");
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res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
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next();
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});
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function insert(create_key) {
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let id = Math.floor(Math.random()*10000).toString();
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client.set(id, create_key, redis.print);
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return id;
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}
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app.post('/local_answer/:id', function(req, res) {
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let id = req.params.id;
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client.set(id, JSON.stringify(req.body), redis.print);
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res.send('ok');
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})
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app.get('/receive_offer/:id', function(req, res) {
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let id = req.params.id;
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client.get(id, function(err, reply) {
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if (!reply) {
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res.send('error');
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} else {
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res.send(reply);
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}
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})
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})
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app.get('/receive_answer/:id', function(req, res) {
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let id = req.params.id;
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client.get(id, function(err, reply) {
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if (!reply) {
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res.send('error');
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} else {
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client.del(id);
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res.send(reply);
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}
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})
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})
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app.post('/join/:id', function(req, res) {
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let id = req.params.id;
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client.get(id, function(err, reply) {
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if (!reply) {
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res.send('error')
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} else {
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res.send(reply);
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}
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})
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})
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app.post('/create', function(req, res) {
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let id = insert(JSON.stringify(req.body));
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res.send(id);
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})
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app.get('/', function (req, res) {
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console.log('get');
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res.send('Hello World!')
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})
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app.listen(3000, function () {
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console.log('Example app listening on port 3000!')
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})
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16
package.json
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16
package.json
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{
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"name": "portal-alpha",
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"version": "0.1.0",
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"description": "",
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"scripts": {
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"start": "browserify public/index.js -o public/bundle.js & node app.js"
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},
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"license": "MIT",
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"dependencies": {
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"body-parser": "^1.17.2",
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"express": "^4.15.3",
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"redis": "^2.7.1",
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"simple-peer": "^5.11.4",
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"wrtc": "0.0.62"
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}
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}
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25
public/index.html
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25
public/index.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title></title>
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</head>
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<body>
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<!--<label>Your ID:</label><br/>-->
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<button id="createChannel">Create a new channel</button>
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<input id="joinChannel" placeholder="Join a channel"></input>
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<textarea id="yourId" style="display: none"></textarea><br/>
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<!--<label>Other ID:</label><br/>-->
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<textarea id="otherId" style="display: none"></textarea>
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<button id="connect">connect</button><br/>
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<br /> <br />
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<label>Enter Message:</label><br/>
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<textarea id="yourMessage"></textarea>
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<button id="send">send</button>
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<pre id="messages"></pre>
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<script src="bundle.js" charset="utf-8"></script>
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</body>
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</html>
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123
public/index.js
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123
public/index.js
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const Peer = require('simple-peer');
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var peer;
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var id = 0;
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if (location.hash === "#init") {
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document.getElementById('joinChannel').style = "display: none";
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document.getElementById('createChannel').addEventListener('click', function() {
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peer = new Peer({
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initiator: location.hash === "#init",
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trickle: false
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});
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do_connection();
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})
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} else {
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document.getElementById('createChannel').style = "display: none";
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peer = new Peer({
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initiator: location.hash === "#init",
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trickle: false
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});
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do_connection();
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}
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function do_connection() {
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peer.on('signal', function(data) {
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if (peer.initiator) {
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var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
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xmlhttp.open("POST", "http://127.0.0.1:3000/create");
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xmlhttp.setRequestHeader("Content-Type", "application/json");
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xmlhttp.send(JSON.stringify(data));
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xmlhttp.onreadystatechange = function() {
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if (xmlhttp.readyState === 4) {
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id = xmlhttp.responseText;
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alert('Share this key with a friend: ' + id);
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document.getElementById('yourId').value = JSON.stringify(data);
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// alert('Send this id to someone else to join your room: ' + xmlhttp.responseText); //Outputs a DOMString by default
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}
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}
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} else {
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document.getElementById('yourId').value = JSON.stringify(data);
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var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
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xmlhttp.open("POST", "http://127.0.0.1:3000/local_answer/" + id + "_answer");
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xmlhttp.setRequestHeader("Content-Type", "application/json");
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xmlhttp.send(JSON.stringify(data));
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xmlhttp.onreadystatechange = function() {
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if (xmlhttp.readyState === 4) {
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// id = xmlhttp.responseText;
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// document.getElementById('yourId').value = xmlhttp.responseText;
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// alert('Send this id to someone else to join your room: ' + xmlhttp.responseText); //Outputs a DOMString by default
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}
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}
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}
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});
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document.getElementById('connect').addEventListener('click', function() {
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if (!peer.initiator) {
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let otherId = document.getElementById('joinChannel').value;
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id = otherId;
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var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
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xmlhttp.open("GET", "http://127.0.0.1:3000/receive_offer/"+otherId);
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xmlhttp.send();
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xmlhttp.onreadystatechange = function() {
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if (xmlhttp.readyState === 4) {
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document.getElementById('otherId').value = xmlhttp.responseText;
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peer.signal(xmlhttp.responseText);
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// alert('Send this id to someone else to join your room: ' + xmlhttp.responseText); //Outputs a DOMString by default
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}
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}
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} else {
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poll_on_server();
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// let otherId = JSON.parse(document.getElementById('otherId').value);
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// peer.signal(otherId);
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}
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function poll_on_server() {
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var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
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xmlhttp.open("GET", "http://127.0.0.1:3000/receive_answer/" + id + "_answer");
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xmlhttp.send();
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xmlhttp.onreadystatechange = function() {
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if (xmlhttp.readyState === 4) {
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// var offerDesc = new RTCSessionDescription(JSON.parse(xmlhttp.responseText))
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if (xmlhttp.responseText === document.getElementById('yourId').value) {
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setTimeout(poll_on_server, 5000);
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} else {
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document.getElementById('otherId').value = xmlhttp.responseText;
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let otherId = JSON.parse(document.getElementById('otherId').value);
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peer.signal(otherId);
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}
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}
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}
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}
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// id = otherId;
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// var xmlhttp = new XMLHttpRequest(); // new HttpRequest instance
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// xmlhttp.open("GET", "http://127.0.0.1:3000/receive_offer/"+id);
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// xmlhttp.send();
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// xmlhttp.onreadystatechange = function() {
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// if (xmlhttp.readyState === 4) {
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// id = xmlhttp.responseText;
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// document.getElementById('otherId').value = xmlhttp.responseText;
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// peer.signal(JSON.parse(xmlhttp.responseText));
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// // alert('Send this id to someone else to join your room: ' + xmlhttp.responseText); //Outputs a DOMString by default
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// }
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// }
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});
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document.getElementById('send').addEventListener('click', function() {
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let yourMessage = document.getElementById('yourMessage').value;
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peer.send(yourMessage);
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});
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peer.on('data', function(data) {
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document.getElementById('messages').textContent += data + '\n';
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});
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}
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