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getting_started_with_webrtc/video_call_with_chat_and_file_sharing.html
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<!DOCTYPE html>
<html>
<head>
<script>
/*
webrtc_polyfill.js by Rob Manson (buildAR.com)
NOTE: Based on adapter.js by Adam Barth
See http://www.webrtc.org/interop for more info
The MIT License
Copyright (c) 2013 Rob Manson, http://buildAR.com. All rights reserved.
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.
*/
var webrtc_capable = true;
var rtc_peer_connection = null;
var rtc_session_description = null;
var rtc_ice_candidate = null
var get_user_media = null;
var connect_stream_to_src = null;
var stun_server = "stun.l.google.com:19302";
if (navigator.getUserMedia) { // WebRTC 1.0 standard compliant browser
rtc_peer_connection = RTCPeerConnection;
rtc_session_description = RTCSessionDescription;
rtc_ice_candidate = RTCIceCandidate;
get_user_media = navigator.getUserMedia.bind(navigator);
connect_stream_to_src = function(media_stream, media_element) {
// https://www.w3.org/Bugs/Public/show_bug.cgi?id=21606
media_element.srcObject = media_stream;
media_element.play();
};
} else if (navigator.mozGetUserMedia) { // early firefox webrtc implementation
rtc_peer_connection = mozRTCPeerConnection;
rtc_session_description = mozRTCSessionDescription;
rtc_ice_candidate = mozRTCIceCandidate;
get_user_media = navigator.mozGetUserMedia.bind(navigator);
connect_stream_to_src = function(media_stream, media_element) {
media_element.mozSrcObject = media_stream;
media_element.play();
};
stun_server = "23.21.150.121"; // Mozilla's STUN server
} else if (navigator.webkitGetUserMedia) { // early webkit webrtc implementation
rtc_peer_connection = webkitRTCPeerConnection;
rtc_session_description = RTCSessionDescription;
rtc_ice_candidate = RTCIceCandidate;
get_user_media = navigator.webkitGetUserMedia.bind(navigator);
connect_stream_to_src = function(media_stream, media_element) {
media_element.src = webkitURL.createObjectURL(media_stream);
media_element.play();
};
} else {
alert("This browser does not support WebRTC - visit WebRTC.org for more info");
webrtc_capable = false;
}
</script>
<script>
/*
video_call_with_chat_and_file_sharing.js by Rob Manson (buildAR.com)
The MIT License
Copyright (c) 2013 Rob Manson, http://buildAR.com. All rights reserved.
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.
*/
var call_token; // unique token for this call
var signaling_server; // signaling server for this call
var peer_connection; // peer connection object
var file_store = []; // shared file storage
var local_stream_added = false;
function start() {
// create the WebRTC peer connection object
peer_connection = new rtc_peer_connection({ // RTCPeerConnection configuration
"iceServers": [ // information about ice servers
{ "url": "stun:"+stun_server }, // stun server info
]
});
// generic handler that sends any ice candidates to the other peer
peer_connection.onicecandidate = function (ice_event) {
console.log("new ice candidate");
if (ice_event.candidate) {
signaling_server.send(
JSON.stringify({
token:call_token,
type: "new_ice_candidate",
candidate: ice_event.candidate ,
})
);
}
};
// display remote video streams when they arrive using remote_video <video> MediaElement
peer_connection.onaddstream = function (event) {
console.log("new remote stream added");
connect_stream_to_src(event.stream, document.getElementById("remote_video"));
// hide placeholder and show remote video
document.getElementById("loading_state").style.display = "none";
console.log("updating UI to open_call_state");
document.getElementById("open_call_state").style.display = "block";
};
// setup stream from the local camera
setup_video();
// setup generic connection to the signaling server using the WebSocket API
console.log("setting up connection to signaling server");
signaling_server = new WebSocket("ws://localhost:1234");
if (document.location.hash === "" || document.location.hash === undefined) { // you are the Caller
console.log("you are the Caller");
// create the unique token for this call
var token = Date.now()+"-"+Math.round(Math.random()*10000);
call_token = "#"+token;
// set location.hash to the unique token for this call
document.location.hash = token;
signaling_server.onopen = function() {
// setup caller signal handler
signaling_server.onmessage = caller_signal_handler;
// tell the signaling server you have joined the call
console.log("sending 'join' signal for call token:"+call_token);
signaling_server.send(
JSON.stringify({
token:call_token,
type:"join",
})
);
}
document.title = "You are the Caller";
console.log("updating UI to loading_state");
document.getElementById("loading_state").innerHTML = "Ready for a call...ask your friend to visit:<br/><br/>"+document.location;
} else { // you have a hash fragment so you must be the Callee
console.log("you are the Callee");
// get the unique token for this call from location.hash
call_token = document.location.hash;
signaling_server.onopen = function() {
// setup caller signal handler
signaling_server.onmessage = callee_signal_handler;
// tell the signaling server you have joined the call
console.log("sending 'join' signal for call token:"+call_token);
signaling_server.send(
JSON.stringify({
token:call_token,
type:"join",
})
);
// let the caller know you have arrived so they can start the call
console.log("sending 'callee_arrived' signal for call token:"+call_token);
signaling_server.send(
JSON.stringify({
token:call_token,
type:"callee_arrived",
})
);
}
document.title = "You are the Callee";
console.log("updating UI to loading_state");
document.getElementById("loading_state").innerHTML = "One moment please...connecting your call...";
}
// setup message bar handlers
document.getElementById("message_input").onkeydown = send_chat_message;
document.getElementById("message_input").onfocus = function() { this.value = ""; }
// setup file sharing
if (!(window.File && window.FileReader && window.FileList && window.Blob)) {
document.getElementById("file_sharing").style.display = "none";
alert("This browser does not support File Sharing");
} else {
document.getElementById("file_add").onclick = click_file_input;
document.getElementById("file_input").addEventListener("change", file_input, false);
document.getElementById("open_call_state").addEventListener("dragover", drag_over, false);
document.getElementById("open_call_state").addEventListener("drop", file_input, false);
}
}
/* functions used above are defined below */
// handler to process new descriptions
function new_description_created(description) {
peer_connection.setLocalDescription(
description,
function () {
signaling_server.send(
JSON.stringify({
token:call_token,
type:"new_description",
sdp:description
})
);
},
log_error
);
}
// handle signals as a caller
function caller_signal_handler(event) {
var signal = JSON.parse(event.data);
console.log(signal.type);
if (signal.type === "callee_arrived") {
create_offer();
} else if (signal.type === "new_ice_candidate") {
peer_connection.addIceCandidate(
new rtc_ice_candidate(signal.candidate)
);
} else if (signal.type === "new_description") {
peer_connection.setRemoteDescription(
new rtc_session_description(signal.sdp),
function () {
if (peer_connection.remoteDescription.type == "answer") {
// extend with your own custom answer handling here
}
},
log_error
);
} else if (signal.type === "new_chat_message") {
add_chat_message(signal);
} else if (signal.type === "new_file_thumbnail_part") {
store_file_part("thumbnail", signal.id, signal.part, signal.length, signal.data);
if (file_store[signal.id].thumbnail.parts.length == signal.length) {
document.getElementById("file_list").innerHTML = get_file_div(signal.id)+document.getElementById("file_list").innerHTML;
document.getElementById("file-img-"+signal.id).src = file_store[signal.id].thumbnail.parts.join("");
}
} else if (signal.type === "new_file_part") {
store_file_part("file", signal.id, signal.part, signal.length, signal.data);
update_file_progress(signal.id, file_store[signal.id].file.parts.length, signal.length);
} else {
// extend with your own signal types here
}
}
function create_offer() {
if (local_stream_added) {
console.log("creating offer");
peer_connection.createOffer(
new_description_created,
log_error
);
} else {
console.log("local stream has not been added yet - delaying creating offer");
setTimeout(function() {
create_offer();
}, 1000);
}
}
// handle signals as a callee
function callee_signal_handler(event) {
var signal = JSON.parse(event.data);
console.log(signal.type);
if (signal.type === "new_ice_candidate") {
peer_connection.addIceCandidate(
new rtc_ice_candidate(signal.candidate)
);
} else if (signal.type === "new_description") {
peer_connection.setRemoteDescription(
new rtc_session_description(signal.sdp),
function () {
if (peer_connection.remoteDescription.type == "offer") {
create_answer();
}
},
log_error
);
} else if (signal.type === "new_chat_message") {
add_chat_message(signal);
} else if (signal.type === "new_file_thumbnail_part") {
store_file_part("thumbnail", signal.id, signal.part, signal.length, signal.data);
if (file_store[signal.id].thumbnail.parts.length == signal.length) {
document.getElementById("file_list").innerHTML = get_file_div(signal.id)+document.getElementById("file_list").innerHTML;
document.getElementById("file-img-"+signal.id).src = file_store[signal.id].thumbnail.parts.join("");
}
} else if (signal.type === "new_file_part") {
store_file_part("file", signal.id, signal.part, signal.length, signal.data);
update_file_progress(signal.id, file_store[signal.id].file.parts.length, signal.length);
} else {
// extend with your own signal types here
}
}
function create_answer() {
if (local_stream_added) {
console.log("creating answer");
peer_connection.createAnswer(new_description_created, log_error);
} else {
console.log("local stream has not been added yet - delaying creating answer");
setTimeout(function() {
create_answer();
}, 1000);
}
}
// add new chat message to messages list
function add_chat_message(signal) {
var messages = document.getElementById("messages");
var user = signal.user || "them";
messages.innerHTML = user+": "+signal.message+"<br/>\n"+messages.innerHTML;
}
// send new chat message to the other browser
function send_chat_message(e) {
if (e.keyCode == 13) {
var new_message = this.value;
this.value = "";
signaling_server.send(
JSON.stringify({
token:call_token,
type: "new_chat_message",
message: new_message
})
);
add_chat_message({ user: "you", message: new_message });
}
}
// setup stream from the local camera
function setup_video() {
console.log("setting up local video stream");
get_user_media(
{
"audio": true, // request access to local microphone
"video": true // request access to local camera
},
function (local_stream) { // success callback
// display preview from the local camera & microphone using local <video> MediaElement
console.log("new local stream added");
connect_stream_to_src(local_stream, document.getElementById("local_video"));
// mute local video to prevent feedback
document.getElementById("local_video").muted = true;
// add local camera stream to peer_connection ready to be sent to the remote peer
console.log("local stream added to peer_connection to send to remote peer");
peer_connection.addStream(local_stream);
local_stream_added = true;
},
log_error
);
}
// file sharing html template
function get_file_div(id) {
return '<div id="file-'+id+'" class="file"><img class="file_img" id="file-img-'+id+'" onclick="display_file(event)" src="images/new_file_arriving.png" /><div id="file-progress-'+id+'" class="file_progress"></div></div>';
}
// initiate manual file selection
function click_file_input(event) {
document.getElementById('file_input').click();
}
// prevent window from reloading when file dragged into it
function drag_over(event) {
event.stopPropagation();
event.preventDefault();
}
// handle manual file selection or drop event
function file_input(event) {
event.stopPropagation();
event.preventDefault();
var files = undefined;
if (event.dataTransfer && event.dataTransfer.files !== undefined) {
files = event.dataTransfer.files;
} else if (event.target && event.target.files !== undefined) {
files = event.target.files;
}
if (files.length > 1) {
alert("Please only select one file at a time");
} else if (!files[0].type.match('image.*')) {
alert("This demo only supports sharing image files");
} else if (files.length == 1) {
var kb = (files[0].size/1024).toFixed(1);
var new_message = "Sending file...<br><strong>"+files[0].name+"</strong> ("+kb+"KB)";
signaling_server.send(
JSON.stringify({
token:call_token,
type: "new_chat_message",
message: new_message
})
);
add_chat_message({ user: "you", message: new_message });
document.getElementById("file_list").innerHTML = get_file_div(file_store.length)+document.getElementById("file_list").innerHTML;
var reader = new FileReader();
reader.onload = (function(file, id) {
return function(event) {
send_file(file.name, id, event.target.result);
}
})(files[0], file_store.length);
reader.readAsDataURL(files[0]);
}
}
// send selected file
function send_file(name, file_id, data) {
var default_width = 160;
var default_height = 120;
var img = document.getElementById("file_img_src");
img.onload = function() {
var image_width = this.width;
var target_width = default_width;
var image_height = this.height;
var target_height = default_height;
var top = 0;
var left = 0;
if (image_width > image_height) {
var ratio = target_width/image_width;
target_height = image_height*ratio;
top = (default_height-target_height)/2;
} else if (image_height > image_width) {
var ratio = target_height/image_height;
target_width = image_width*ratio;
left = (default_width-target_width)/2;
} else {
left = (default_width-default_height)/2;
target_width = target_height;
}
var canvas = document.getElementById("file_thumbnail_canvas");
canvas.width = default_width;
canvas.height = default_height;
var cc = canvas.getContext("2d");
cc.clearRect(0,0,default_width,default_height);
cc.drawImage(img, left, top, target_width, target_height);
var thumbnail_data = canvas.toDataURL("image/png");
document.getElementById("file-img-"+file_id).src = thumbnail_data;
send_file_parts("thumbnail", file_id, thumbnail_data);
send_file_parts("file", file_id, data);
}
img.src = data;
}
// break file into parts and send each of them separately
function send_file_parts(type, id, data) {
var message_type = "new_file_part";
if (type == "thumbnail") {
message_type = "new_file_thumbnail_part";
}
var slice_size = 1024;
var parts = data.length/slice_size;
if (parts % 1 > 0) {
parts = Math.round(parts)+1;
}
for (var i = 0; i < parts; i++) {
var from = i*slice_size;
var to = from+slice_size;
var data_slice = data.slice(from, to);
store_file_part(type, id, i, parts, data_slice);
signaling_server.send(
JSON.stringify({
token:call_token,
type: message_type,
id: id,
part: i,
length: parts,
data: data_slice
})
);
}
}
// store individual file parts in the local file store
function store_file_part(type, id, part, length, data) {
if (file_store[id] === undefined) {
file_store[id] = {};
}
if (file_store[id][type] === undefined) {
file_store[id][type] = {
parts: []
};
}
if (file_store[id][type].length === undefined) {
file_store[id][type].length = length;
}
file_store[id][type].parts[part] = data;
}
// show the progress of a file transfer
function update_file_progress(id, parts, length) {
var percentage = Math.round((parts/length)*100);
if (percentage < 100) {
document.getElementById("file-progress-"+id).innerHTML = percentage+"%";
document.getElementById("file-img-"+id).style.opacity = 0.25;
} else {
document.getElementById("file-progress-"+id).innerHTML = "";
document.getElementById("file-img-"+id).style.opacity = 1;
}
}
// show the full file
function display_file(event) {
var match = event.target.id.match("file-img-(.*)");
var file = file_store[match[1]].file;
if (file.parts.length < file.length) {
alert("Please wait - file still transfering");
} else {
window.open(file.parts.join(""));
}
}
// generic error handler
function log_error(error) {
console.log(error);
}
</script>
<style>
html, body {
padding: 0px;
margin: 0px;
font-family: "Arial","Helvetica",sans-serif;
}
#loading_state {
position: absolute;
top: 45%;
left: 0px;
width: 100%;
font-size: 20px;
text-align: center;
}
#open_call_state {
display: none;
}
#local_video {
position: absolute;
top: 10px;
left: 10px;
width: 160px;
height: 120px;
background: #333333;
}
#remote_video {
position: absolute;
top: 0px;
left: 0px;
width: 1024px;
height: 768px;
background: #999999;
}
#chat {
position: absolute;
top: 0px;
left: 1024px;
height: 768px;
width: 300px;
background: #CCCCCC;
}
#messages {
overflow: auto;
position: absolute;
top: 20px;
left: 0px;
height: 733px;
width: 295px;
padding-top: 15px;
padding-left: 5px;
font-size: 14px;
}
#message_input {
position: absolute;
top: 5px;
left: 5px;
height: 20px;
width: 280px;
padding-left: 5px;
background: #FFFFFF;
}
#file_sharing {
position: absolute;
top: 140px;
left: 10px;
height: 628px;
width: 160px;
}
#file_input {
display: none;
}
#file_add {
position: absolute;
padding: 0px;
height: 120px;
width: 160px;
text-align: center;
}
#file_list {
overflow: auto;
position: absolute;
padding: 0px;
top: 130px;
height: 488px;
width: 180px;
}
.file {
width: 160px;
height: 120px;
padding: 0px;
padding-bottom: 10px;
margin: 0px;
}
.file_img {
width: 160px;
height: 120px;
}
.file_progress {
color: #333333;
font-family: "Helvetica","Arial",sans-serif;
font-size: 30px;
font-weight: bold;
position: relative;
text-align: center;
top: -80px;
width: 160px;
}
#file_img_src {
display: none;
}
#file_thumbnail_canvas {
display: none;
width: 160px;
height: 120px;
}
</style>
</head>
<body onload="start()">
<div id="loading_state">
loading...
</div>
<div id="open_call_state">
<video id="remote_video"></video>
<video id="local_video"></video>
<div id="chat">
<div id="messages"></div>
<input type="text" id="message_input" value="Type here then hit enter..."></input>
</div>
<div id="file_sharing">
<input type="file" id="file_input"></input>
<div id="file_add">
<img src="images/share_new_file.png" />
</div>
<div id="file_list">
</div>
<img id="file_img_src" />
<canvas id="file_thumbnail_canvas"></canvas>
</div>
</div>
</body>
</html>
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