hello/index.html at master · andreik6v/hello · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
<!DOCTYPE html>
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />
	<meta name="description" content="Hello is a video chat app that works in most major desktop & mobile browsers. No Signup. No Downloads. Just video chat." />
	<meta name="keywords" content="group video chat, video communication, multiparty video chat, video chat, webrtc, peer to peer, p2p" />
	<meta name="author" content="Vasanth.V" />
	<meta name="application-name" content="Hello" />
	<meta name="theme-color" content="#000000">

	<link rel="icon" href="favicon.ico" type="image/x-icon" />
	<link rel="icon" href="icon.png" type="image/png" />
	<link rel="icon" href="icon.svg" sizes="any" type="image/svg+xml" />
	<style>
		*{outline: none;}
		html, body { margin: 0px; font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif;line-height: 1.5;-webkit-font-smoothing: antialiased;-moz-osx-font-smoothing: grayscale;background: #000;}
		video {width:100%;height:auto;height:100%;object-fit: cover;}
		.video {float: left; width: 25vw;height: 50vh;overflow: hidden;}
		.video.one{width: 100vw;height: 100vh;}
		.video.two{width: 50vw;height: 100vh;}
		.video.three{width: 33.33vw;height: 100vh;}
		.video.four{width: 50vw;height: 50vh;}
		.video.six{width: 33.33vw;height: 50vh;}
		#selfVideoWrap{position: relative;}
		#selfVideo {transform: rotateY(180deg);-webkit-transform:rotateY(180deg);-moz-transform:rotateY(180deg);}
		#btnWrap{position: absolute;bottom:10px;left:0px;right:0px;text-align:center;z-index: 999;}
		#mutebtn{padding:10px;margin:0px 10px;width:64px;font-size:2em;cursor: pointer;background: none;border:none;color:#fff;}
		#videomutebtn{padding:10px;margin:0px 10px;width:64px;font-size:2em;cursor: pointer;background: none;border:none;color:#fff;}
		.fa-microphone-slash, .fa-video-slash{color:#e74c3c!important;}
		#roomurl{display:inline-block;border-radius: 5px;border:1px solid #dcdcdc;background: #efefef;font-size: 80%;padding: 5px;margin-top: 5px;}
		.message{width: 300px; position: fixed; bottom: 10px; right:10px;box-sizing: border-box; padding:10px;background: #fff; border-radius: 5px;z-index: 1000;}
		#tooManyParticipants{background: #c0392b;color: #fff;display: none;}
		@media only screen and (max-width: 960px) {
			.video {float: left; width: 50vw;height: 25vh;overflow: hidden;}
			.video.two{width: 100vw;height: 50vh;}
			.video.three{width: 100vw;height: 33.33vh;}
			.video.six{width: 50vw;height: 33.33vh;}
		}
	</style>
	<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.4.1/css/all.css" integrity="sha384-5sAR7xN1Nv6T6+dT2mhtzEpVJvfS3NScPQTrOxhwjIuvcA67KV2R5Jz6kr4abQsz" crossorigin="anonymous"/>
	<script src="https://webrtc.github.io/adapter/adapter-latest.js"></script>
	<script src="/socket.io/socket.io.js"></script>
	<script type="text/javascript">
		const appURL = () => {
			const protocol = 'http'+((location.hostname == 'localhost') ? '' : 's')+'://';
			return protocol+location.hostname + ((location.hostname == 'localhost') ? ':3000' : '');
		}
		const getRoomName = () => {
			let roomName = location.pathname.substring(1);
			if(roomName == '') {
				const randomName = () => Math.random().toString(36).substr(2, 6);
				roomName = randomName();
				const newurl = appURL() +'/'+ roomName;
				window.history.pushState({url: newurl}, roomName, newurl);
			}
			return roomName;
		}
		var SIGNALING_SERVER = appURL();
		var USE_AUDIO = true;
		var USE_VIDEO = true;
		var ROOM_ID = getRoomName();

		var ICE_SERVERS = [
			{'urls': 'stun:stun.l.google.com:19302'},
			{'urls': 'stun:stun.stunprotocol.org:3478'},
			{'urls': 'stun:stun.sipnet.net:3478'},
			{'urls': 'stun:stun.ideasip.com:3478'},
			{'urls': 'stun:stun.iptel.org:3478'}
		];
	</script>


	<script type="text/javascript">
		var signaling_socket = null;   /* our socket.io connection to our webserver */
		var local_media_stream = null; /* our own microphone / webcam */
		var peers = {};                /* keep track of our peer connections, indexed by peer_id (aka socket.io id) */
		var peer_media_elements = {};  /* keep track of our <video>/<audio> tags, indexed by peer_id */

		function init() {
			// console.log("Connecting to signaling server");
			signaling_socket = io(SIGNALING_SERVER);
			signaling_socket = io();

			signaling_socket.on('connect', function() {
				// console.log("Connected to signaling server");
				setup_local_media(function() {
					/* once the user has given us access to their
					 * microphone/camcorder, join the channel and start peering up */
					join_chat_channel(ROOM_ID, {});
				});
			});
			signaling_socket.on('disconnect', function() {
				// console.log("Disconnected from signaling server");
				/* Tear down all of our peer connections and remove all the
				 * media divs when we disconnect */
				for (peer_id in peer_media_elements) {
					document.body.removeChild(peer_media_elements[peer_id].parentNode);
					resizeVideos();
				}
				for (peer_id in peers) {
					peers[peer_id].close();
				}

				peers = {};
				peer_media_elements = {};
			});
			function join_chat_channel(channel, userdata) {
				signaling_socket.emit('join', {"channel": channel, "userdata": userdata});
			}
			function part_chat_channel(channel) {
				signaling_socket.emit('part', channel);
			}


			/**
			* When we join a group, our signaling server will send out 'addPeer' events to each pair
			* of users in the group (creating a fully-connected graph of users, ie if there are 6 people
			* in the channel you will connect directly to the other 5, so there will be a total of 15
			* connections in the network).
			*/
			signaling_socket.on('addPeer', function(config) {
				// console.log('Signaling server said to add peer:', config);
				var peer_id = config.peer_id;
				if (peer_id in peers) {
					/* This could happen if the user joins multiple channels where the other peer is also in. */
					// console.log("Already connected to peer ", peer_id);
					return;
				}
				var peer_connection = new RTCPeerConnection(
					{"iceServers": ICE_SERVERS},
					{"optional": [{"DtlsSrtpKeyAgreement": true}]} // this will no longer be needed by chrome eventually (supposedly), but is necessary for now to get firefox to talk to chrome
				);
				peers[peer_id] = peer_connection;

				peer_connection.onicecandidate = function(event) {
					if (event.candidate) {
						signaling_socket.emit('relayICECandidate', {
							'peer_id': peer_id,
							'ice_candidate': {
								'sdpMLineIndex': event.candidate.sdpMLineIndex,
								'candidate': event.candidate.candidate
							}
						});
					}
				}
				peer_connection.onaddstream = function(event) {
					// console.log("onAddStream", event);
					const videoWrap = document.createElement('div');
					videoWrap.className = 'video';
					const remote_media = document.createElement('video');
					videoWrap.appendChild(remote_media);
					remote_media.setAttribute('playsinline', true);
					remote_media.mediaGroup = 'remotevideo';
					remote_media.autoplay = true;
					remote_media.controls = false;
					peer_media_elements[peer_id] = remote_media;
					document.body.appendChild(videoWrap);
					attachMediaStream(remote_media, event.stream);
					resizeVideos();
					checkParticipantsCount();
				}

				/* Add our local stream */
				peer_connection.addStream(local_media_stream);

				/* Only one side of the peer connection should create the
				 * offer, the signaling server picks one to be the offerer.
				 * The other user will get a 'sessionDescription' event and will
				 * create an offer, then send back an answer 'sessionDescription' to us
				 */
				if (config.should_create_offer) {
					// console.log("Creating RTC offer to ", peer_id);
					peer_connection.createOffer(
						function (local_description) {
							// console.log("Local offer description is: ", local_description);
							peer_connection.setLocalDescription(local_description,
								function() {
									signaling_socket.emit('relaySessionDescription',
										{'peer_id': peer_id, 'session_description': local_description});
									// console.log("Offer setLocalDescription succeeded");
								},
								function() { Alert("Offer setLocalDescription failed!"); }
							);
						},
						function (error) {
							console.log("Error sending offer: ", error);
						});
				}
			});


			/**
			 * Peers exchange session descriptions which contains information
			 * about their audio / video settings and that sort of stuff. First
			 * the 'offerer' sends a description to the 'answerer' (with type
			 * "offer"), then the answerer sends one back (with type "answer").
			 */
			signaling_socket.on('sessionDescription', function(config) {
				// console.log('Remote description received: ', config);
				var peer_id = config.peer_id;
				var peer = peers[peer_id];
				var remote_description = config.session_description;
				// console.log(config.session_description);

				var desc = new RTCSessionDescription(remote_description);
				var stuff = peer.setRemoteDescription(desc,
					function() {
						// console.log("setRemoteDescription succeeded");
						if (remote_description.type == "offer") {
							// console.log("Creating answer");
							peer.createAnswer(
								function(local_description) {
									// console.log("Answer description is: ", local_description);
									peer.setLocalDescription(local_description,
										function() {
											signaling_socket.emit('relaySessionDescription',
												{'peer_id': peer_id, 'session_description': local_description});
											// console.log("Answer setLocalDescription succeeded");
										},
										function() { Alert("Answer setLocalDescription failed!"); }
									);
								},
								function(error) {
									console.log("Error creating answer: ", error);
									// console.log(peer);
								});
						}
					},
					function(error) {
						console.log("setRemoteDescription error: ", error);
					}
				);
				// console.log("Description Object: ", desc);
			});

			/**
			 * The offerer will send a number of ICE Candidate blobs to the answerer so they
			 * can begin trying to find the best path to one another on the net.
			 */
			signaling_socket.on('iceCandidate', function(config) {
				var peer = peers[config.peer_id];
				var ice_candidate = config.ice_candidate;
				peer.addIceCandidate(new RTCIceCandidate(ice_candidate));
			});

			/**
			 * When a user leaves a channel (or is disconnected from the
			 * signaling server) everyone will recieve a 'removePeer' message
			 * telling them to trash the media channels they have open for those
			 * that peer. If it was this client that left a channel, they'll also
			 * receive the removePeers. If this client was disconnected, they
			 * wont receive removePeers, but rather the
			 * signaling_socket.on('disconnect') code will kick in and tear down
			 * all the peer sessions.
			 */
			signaling_socket.on('removePeer', function(config) {
				// console.log('Signaling server said to remove peer:', config);
				var peer_id = config.peer_id;
				if (peer_id in peer_media_elements) {
					document.body.removeChild(peer_media_elements[peer_id].parentNode);
					resizeVideos();
				}
				if (peer_id in peers) {
					peers[peer_id].close();
				}

				delete peers[peer_id];
				delete peer_media_elements[config.peer_id];
			});
			document.getElementById('roomurl').textContent = appURL()+'/'+getRoomName();
			document.getElementById('roomurl').addEventListener('click', event => {
				let range, selection;
				selection = window.getSelection();
				range = document.createRange();
				range.selectNodeContents(event.target);
				selection.removeAllRanges();
				selection.addRange(range);
			});

		}
		function setup_local_media(callback, errorback) {
			if (local_media_stream != null) {  /* ie, if we've already been initialized */
				if (callback) callback();
				return;
			}
			attachMediaStream = function(element, stream) {
				// console.log('DEPRECATED, attachMediaStream will soon be removed.');
				element.srcObject = stream;
			};
			navigator.mediaDevices.getUserMedia({"audio":USE_AUDIO, "video":USE_VIDEO}).then((stream) => {
				local_media_stream = stream;
				const videoWrap = document.createElement('div');
				videoWrap.className = 'video';
				videoWrap.setAttribute('id', 'selfVideoWrap');
				const btnWrap = document.createElement('div');
				btnWrap.setAttribute('id', 'btnWrap');
				const muteBtn = document.createElement('button');
				muteBtn.setAttribute('id', 'mutebtn');
				muteBtn.className = 'fas fa-microphone';
				muteBtn.addEventListener('click', (e) => {
					local_media_stream.getAudioTracks()[0].enabled = !(local_media_stream.getAudioTracks()[0].enabled);
					e.target.className = 'fas fa-microphone'+(local_media_stream.getAudioTracks()[0].enabled ? '' : '-slash');
				});
				btnWrap.appendChild(muteBtn);
				const videoMuteBtn = document.createElement('button');
				videoMuteBtn.setAttribute('id', 'videomutebtn');
				videoMuteBtn.className = 'fas fa-video';
				videoMuteBtn.addEventListener('click', (e) => {
					local_media_stream.getVideoTracks()[0].enabled = !(local_media_stream.getVideoTracks()[0].enabled);
					e.target.className = 'fas fa-video'+(local_media_stream.getVideoTracks()[0].enabled ? '' : '-slash');
				});
				btnWrap.appendChild(videoMuteBtn);
				videoWrap.appendChild(btnWrap);
				const local_media = document.createElement('video');
				videoWrap.appendChild(local_media);
				local_media.setAttribute('id', 'selfVideo');
				local_media.setAttribute('playsinline', true);
				local_media.autoplay = true;
				local_media.muted = true;
				local_media.volume = 0
				local_media.controls = false;
				document.body.appendChild(videoWrap);
				attachMediaStream(local_media, stream);
				resizeVideos();
				if (callback) callback();
			}).catch(() => { /* user denied access to a/v */
				alert("This site will not work without camera/microphone access.");
				if (errorback) errorback();
			});
		}
		const resizeVideos = () => {
			const numToString = ['', 'one', 'two', 'three', 'four', 'five', 'six'];
			const videos = document.querySelectorAll('.video');
			document.querySelectorAll('.video').forEach(v => {
				v.className = 'video '+numToString[videos.length];
			});
		};
		const checkParticipantsCount = () => {
			const videos = document.querySelectorAll('.video');
			if(videos.length > 4){
				document.getElementById('tooManyParticipants').style.display = 'block';
				setTimeout(() => {
					document.getElementById('tooManyParticipants').style.display = 'none';
				}, 3000);
			}
			if(videos.length > 1) {
				document.getElementById('intro').style.display = 'none';
			}
		}
	</script>
</head>
<body onload='init()'>
	<div id="intro" class="message">
		Invite your friends to video call by sharing this URL.
		<span id="roomurl"></span>
		<br/><a href="https://github.com/vasanthv/hello#readme" style="font-size: small;">Know More</a>
	</div>
	<div id="tooManyParticipants" class="message">Too many participants will affect the performance of the video call.</div>
</body>
</html>