--- /dev/null
+document.title = "Strapp.io Host"
+
+
+const conf = {"iceServers": [{ "urls": "stun:stun.1.google.com:19302" }] }
+const clients = new Map([])
+const iceCandidates = []
+let dataChannel
+let screenStream /* TODO: Remove if can access localStreams */
+let tracks = []
+let hpk
+
+/* TODO: duplicate in both client.js and host.jhs */
+function getPublicKey() {
+ return new Promise( (resolve, reject) => {
+ /* Check local storage for public key */
+ if (!window.localStorage.getItem('public-key')) {
+ console.log('public key is undefined')
+ /* If doesn't exist, generate public and private key pair, store in
+ local storage */
+ crypto.subtle.generateKey(
+ { name:'RSA-OAEP',
+ modulusLength: 2048,
+ publicExponent: new Uint8Array([0x01, 0x00, 0x01]),
+ hash: {name: "SHA-256"}
+ },
+ true,
+ ['encrypt', 'decrypt']
+ ).then((keyPair) => {
+ /* TODO: Do we need to store the private key as well? */
+ crypto.subtle.exportKey('jwk', keyPair.publicKey)
+ .then((exportedKey) => {
+ window.localStorage.setItem('publicKey', exportedKey)
+ console.log('public key is' + window.localStorage.getItem('publicKey'))
+ resolve(exportedKey)
+ })
+
+ })
+ }
+ else {
+ resolve(window.localStorage.getItem('publicKey'))
+ }
+ })
+}
+
+function sendClientICE(clientPubKey, hostPubKey, iceCandidate) {
+ console.log('Host: Allocating ice candidate for client')
+ console.log(iceCandidate)
+ iceCandidates.push(JSON.stringify({
+ cmd: "< ice pubKey",
+ ice: iceCandidate,
+ hostPubKey: hostPubKey, /* TODO: do we need to send this? */
+ clientPubKey: clientPubKey,
+ iceState: "a"
+ }))
+}
+
+function handleNewClientConnection(pubKey, sdpOffer) {
+ /* New Client Connection*/
+ hpc = new RTCPeerConnection(conf)
+ console.log('handleNewClientConnections()')
+ console.log(sdpOffer)
+ clients.set(pubKey, hpc)
+ console.log(pubKey)
+ hpc.setRemoteDescription(sdpOffer)
+ .then(() => {
+ hpc.createAnswer().then((answer) => {
+ return hpc.setLocalDescription(answer)
+ })
+ .then(() => {
+
+ hpc.onicecandidate = (event) => {
+ if (event.candidate) {
+ sendClientICE(pubKey, hpk.n, event.candidate)
+ }
+ else {
+ console.log('Host: Finished allocating ICE candidates')
+ }
+ }
+ console.log('Host: Sending answer to Client ')
+ wsock.send(JSON.stringify({
+ cmd: '< sdp pubKey',
+ sdp: hpc.localDescription,
+ hostPubKey: hpk.n,
+ clientPubKey: pubKey
+ }))
+
+ }).catch((err) => {
+ console.log(`error in host answer ${err}`)
+ })
+ }).catch((error) => {
+ console.log(`error in setRemoteDescription ${error}`)
+ })
+ hpc.oniceconnectionstatechange = () => {
+ console.log('iceConnectionState = ' + hpc.iceConnectionState)
+ }
+ hpc.ondatachannel = (evt) => {
+ dataChannel = evt.channel
+ dataChannel.onmessage = (msg) => {
+ let clientMessage = JSON.parse(msg.data)
+ console.log(`client message is ${clientMessage}`)
+ hpc.setRemoteDescription(clientMessage.sdp).then(() => {
+ console.log('should be streaming now')
+ })
+ }
+ dataChannel.onopen = () => {
+ /* If !screenStream, gUM */
+ screenStream.getTracks().forEach( (track) => {
+ hpc.addTrack(track, screenStream)
+ })
+ console.log(hpc.getSenders())
+ /* Create offer */
+ hpc.createOffer().then((offer) => {
+ return hpc.setLocalDescription(offer)
+ }).then( () => {
+ dataChannel.send(JSON.stringify({
+ "cmd": "< screen dataChannel",
+ "sdp": hpc.localDescription,
+ "pubKey": hpc['hpk'].n
+ }))
+ })
+ }
+ }
+ hpc.onnegotiationneeded = () => {
+ console.log('negotiation needed')
+ }
+
+}
+
+function handleNewIceCandidate(msg) {
+ console.log('Host: Adding new ice candidate')
+ const hpc = clients.get(msg.pubKey)
+ let candidate = new RTCIceCandidate(msg.ice)
+ hpc.addIceCandidate(candidate)
+}
+
+function handleIceRequest(msg) {
+ console.log('Host: Handling ice candidate request')
+ console.log(iceCandidates)
+ const hpc = clients.get(msg.pubKey)
+ const iceCandidate = iceCandidates.pop()
+ if (iceCandidate !== undefined) {
+ wsock.send(iceCandidate)
+ } else {
+ if (hpc.iceGatheringState.localeCompare('gathering') === 0) {
+ wsock.send(`{"cmd" : "< ice pubKey", "clientPubKey":"${msg.pubKey}", "iceState": "g"}`)
+ }
+ else if (hpc.iceGatheringState.localeCompare('complete') === 0) {
+ wsock.send(`{"cmd" : "< ice pubKey", "clientPubKey":"${msg.pubKey}", "iceState": "c"}`)
+ }
+
+ }
+
+}
+if ("WebSocket" in window) {
+ document.addEventListener('DOMContentLoaded', (event) => {
+ document.body.innerHTML = '<div>Choose options for client</div> <video autoplay></video>'
+ navigator.mediaDevices.getUserMedia({
+ video : { mediaSource: "screen",
+ width: {max: '1920'},
+ height: {max: '1080'},
+ frameRate: {max: '10'}} })
+ .then(function(mediaStream) {
+ let video = document.querySelector('video')
+ screenStream = mediaStream
+ console.log(mediaStream)
+ video.srcObject = mediaStream
+ console.log('Grabbed media')
+ video.onloadedmetadata = function(e) {
+ console.log(e)
+ video.play()
+ }
+ })
+ .catch(function(err) {
+ document.body.innerHTML = 'Help me help you. Reload the page and allow screen sharing!'
+ console.log(err);
+ }); // always check for errors at the end.
+
+ getPublicKey()
+ .then((hpkVal) => {
+ hpk = hpkVal
+ })
+ wsock = new WebSocket(`${_strapp_protocol}://${window.location.hostname}:${_strapp_port}`)
+ wsock.onopen = () => {
+ console.log(`Strapped to ${_strapp_protocol}://${window.location.hostname}:${_strapp_port}`)
+ }
+
+ wsock.onmessage = (serverMsg) => {
+ /* msg is either offer or ice candidate or ice candidate request*/
+
+ /* What if data null? */
+ console.log(`serverMsg = ${serverMsg.data}`)
+
+ let msg = serverMsg.data.split(' ')
+ let clientID = msg[0]
+ let type = msg[1]
+ let data = JSON.parse(msg.splice(2).join())
+
+ if (clients.has(clientID)) {
+ switch (type) {
+ case 'ice-candidate-submission':
+ handleNewIceCandidate(msg)
+ break
+ case 'ice-candidate-request':
+ handleIceRequest(msg)
+ break
+ case 'client-sdp-offer':
+ //repeatedoffer shouldnt happen here
+ }
+ }
+ else {
+ switch (type) {
+ case 'client-sdp-offer':
+ handleNewClientConnection(clientID, data)
+ break
+ case 'ice-candidate-request':
+ handleIceRequest()
+ break
+ case 'ice-candidate-submission':
+ handleNewIceCandidate
+ break
+ }
+ }
+ }
+
+
+
+ })
+}
+else {
+ document.addEventListener('DOMContentLoaded', () => {
+ document.body.innerHTML = 'Websockets not supported in your browser'
+ })
+}
projects / henge / kiak.git / blobdiff