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App.js
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App.js
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import React, { Component } from 'react';
import io from 'socket.io-client'
class App extends Component {
constructor(props) {
super(props)
// https://reactjs.org/docs/refs-and-the-dom.html
this.localVideoref = React.createRef()
this.remoteVideoref = React.createRef()
this.socket = null
this.candidates = []
}
componentDidMount = () => {
this.socket = io.connect(
'https://8aa7a006.ngrok.io/webrtcPeer',
{
path: '/io/webrtc',
query: {}
}
)
this.socket.on('connection-success', success => {
console.log(success)
})
this.socket.on('offerOrAnswer', (sdp) => {
this.textref.value = JSON.stringify(sdp)
// set sdp as remote description
this.pc.setRemoteDescription(new RTCSessionDescription(sdp))
})
this.socket.on('candidate', (candidate) => {
// console.log('From Peer... ', JSON.stringify(candidate))
// this.candidates = [...this.candidates, candidate]
this.pc.addIceCandidate(new RTCIceCandidate(candidate))
})
// const pc_config = null
const pc_config = {
"iceServers": [
// {
// urls: 'stun:[STUN_IP]:[PORT]',
// 'credentials': '[YOR CREDENTIALS]',
// 'username': '[USERNAME]'
// },
{
urls : 'stun:stun.l.google.com:19302'
}
]
}
// https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection
// create an instance of RTCPeerConnection
this.pc = new RTCPeerConnection(pc_config)
// triggered when a new candidate is returned
this.pc.onicecandidate = (e) => {
// send the candidates to the remote peer
// see addCandidate below to be triggered on the remote peer
if (e.candidate) {
// console.log(JSON.stringify(e.candidate))
this.sendToPeer('candidate', e.candidate)
}
}
// triggered when there is a change in connection state
this.pc.oniceconnectionstatechange = (e) => {
console.log(e)
}
// triggered when a stream is added to pc, see below - this.pc.addStream(stream)
// this.pc.onaddstream = (e) => {
// this.remoteVideoref.current.srcObject = e.stream
// }
this.pc.ontrack = (e) => {
debugger
this.remoteVideoref.current.srcObject = e.streams[0]
}
// called when getUserMedia() successfully returns - see below
// getUserMedia() returns a MediaStream object (https://developer.mozilla.org/en-US/docs/Web/API/MediaStream)
const success = (stream) => {
window.localStream = stream
this.localVideoref.current.srcObject = stream
this.pc.addStream(stream)
}
// called when getUserMedia() fails - see below
const failure = (e) => {
console.log('getUserMedia Error: ', e)
}
// https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
// see the above link for more constraint options
const constraints = {
// audio: true,
video: true,
// video: {
// width: 1280,
// height: 720
// },
// video: {
// width: { min: 1280 },
// }
options: {
mirror: true,
}
}
// https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia
navigator.mediaDevices.getUserMedia(constraints)
.then(success)
.catch(failure)
}
sendToPeer = (messageType, payload) => {
this.socket.emit(messageType, {
socketID: this.socket.id,
payload
})
}
/* ACTION METHODS FROM THE BUTTONS ON SCREEN */
createOffer = () => {
console.log('Offer')
// https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createOffer
// initiates the creation of SDP
this.pc.createOffer({ offerToReceiveVideo: 1 })
.then(sdp => {
// console.log(JSON.stringify(sdp))
// set offer sdp as local description
this.pc.setLocalDescription(sdp)
this.sendToPeer('offerOrAnswer', sdp)
})
}
// https://developer.mozilla.org/en-US/docs/Web/API/RTCPeerConnection/createAnswer
// creates an SDP answer to an offer received from remote peer
createAnswer = () => {
console.log('Answer')
this.pc.createAnswer({ offerToReceiveVideo: 1 })
.then(sdp => {
// console.log(JSON.stringify(sdp))
// set answer sdp as local description
this.pc.setLocalDescription(sdp)
this.sendToPeer('offerOrAnswer', sdp)
})
}
setRemoteDescription = () => {
// retrieve and parse the SDP copied from the remote peer
const desc = JSON.parse(this.textref.value)
// set sdp as remote description
this.pc.setRemoteDescription(new RTCSessionDescription(desc))
}
addCandidate = () => {
// retrieve and parse the Candidate copied from the remote peer
// const candidate = JSON.parse(this.textref.value)
// console.log('Adding candidate:', candidate)
// add the candidate to the peer connection
// this.pc.addIceCandidate(new RTCIceCandidate(candidate))
this.candidates.forEach(candidate => {
console.log(JSON.stringify(candidate))
this.pc.addIceCandidate(new RTCIceCandidate(candidate))
});
}
render() {
return (
<div>
<video
style={{
width: 240,
height: 240,
margin: 5,
backgroundColor: 'black'
}}
ref={ this.localVideoref }
autoPlay muted>
</video>
<video
style={{
width: 240,
height: 240,
margin: 5,
backgroundColor: 'black'
}}
ref={ this.remoteVideoref }
autoPlay>
</video>
<br />
<button onClick={this.createOffer}>Offer</button>
<button onClick={this.createAnswer}>Answer</button>
<br />
<textarea style={{ width: 450, height:40 }} ref={ref => { this.textref = ref }} />
{/* <br />
<button onClick={this.setRemoteDescription}>Set Remote Desc</button>
<button onClick={this.addCandidate}>Add Candidate</button> */}
</div>
)
}
}
export default App;