document.title = "Strapp.io Client"
body.appendChild(root)
document.body = body
+const conf = {"iceServers": [{ "urls": "stun:stun.1.google.com:19302" }] }
+let dataChannel
-/*************/
-/* UNTESTED */
-/************
+/* TODO: duplicate in both client.js and host.js */
+function getPublicKey() {
+ return new Promise( (resolve, reject) => {
+ /* Check local storage for public key */
+ if (!window.localStorage.getItem('public-key')) {
+ /* 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 postServer(url, data) {
+ const request = new XMLHttpRequest()
+ request.open('POST', url, true)
+ request.setRequestHeader('Content-Type', 'application/json' )
+ request.setRequestHeader('X-Strapp-Type', 'ice-candidate-submission')
+ request.send(data)
+}
+/* TODO: All this does is wrap a function in a promise. Allows pollServerForAnswer
+to call itself recursively with the same promise */
+function pollServer(url, clientPubKey, func) {
+ return new Promise((resolve, reject) => {
+ func(url, clientPubKey, resolve, reject )
+ })
+}
/* Poll the server. Send get request, wait for timeout, send another request.
- Do this until...? Can be used for either reconnecting or waiting for answer*/
-function pollServerTimeout(url, data, resolve, reject) {
- console.log('Polling server with offer ' + data)
- const request = XMLHttpRequest()
- request.open('GET', url)
+Do this until...? Can be used for either reconnecting or waiting for answer*/
+function pollServerForAnswer(url, data, resolve, reject) {
+ const request = new XMLHttpRequest()
+ request.open('GET', url, true)
+ /* But there is no JSON? */
request.setRequestHeader('Content-Type', 'application/json' )
+ request.setRequestHeader('X-Strapp-Type', 'client-sdp-offer')
+ request.setRequestHeader('X-Client-Offer', JSON.stringify(data))
request.onreadystatechange = () => {
if (request.status === 200) {
- console.log('recieved answer from host ' + request.response)
- resolve(request.response)
+ if(request.readyState === 4) {
+ console.log('Client: Recieved Answer from Host')
+ console.log(request)
+ resolve(request.response)
+ }
}
else if (request.status === 504) {
- pollServerTimeout(url, data, resolve, reject)
+ console.log('timed out, resending')
+ pollServerForAnswer(url, data, resolve, reject)
}
else {
- reject('server errored out with ' + request.status)
+ reject('server unhandled response of status ' + request.status)
}
}
- request.send(data)
+ request.send()
}
-/* TODO: Possible to pass resolve/reject to functions? */
-function pollServer(url, clientPubKey, func) {
- return new Promise((resolve, reject) => {
- func(url, clientPubKey, resolve, reject )
- })
+/* Poll server for ice candidates until ice is complete */
+function pollServerForICECandidate(cpc, url, pubKey) {
+ let intervalID = window.setInterval(() => {
+ if (cpc.iceConnectionState.localeCompare('connected') !== 0
+ && cpc.iceConnectionState.localeCompare('completed') !== 0) {
+ console.log('Client: Polling server begin for intervalID = ' + intervalID)
+ console.log('Client: Requesting ICE Candidates from server')
+ const request = new XMLHttpRequest()
+ request.open('GET', url, true)
+ request.setRequestHeader('Content-Type', 'application/json' )
+ request.setRequestHeader('X-Strapp-Type', 'ice-candidate-request')
+ request.setRequestHeader('X-client-pubkey', pubKey)
+ request.onreadystatechange = () => {
+ if (request.status === 200) {
+ if(request.readyState === 4) {
+ console.log('Client: Recieved ICE response from Host')
+ let response = JSON.parse(request.response)
+ switch(response['iceState']) {
+ case "a":
+ cpc.addIceCandidate(new RTCIceCandidate(response.ice))
+ break
+ case "g": /* Gathering so let interval keep polling */
+ break
+ case "c": /* host iceState == Complete, stop bugging it */
+ clearInterval(intervalID)
+ clearTimeout()
+ break
+ default:
+ console.log('Unhandled iceState in pollServerForICECandidate()' + response['iceState'])
+ break
+ }
+ }
+ }
+ else {
+ console.log('server unhandled response of status ' + request.status)
+ clearInterval(intervalID)
+ }
+ }
+ request.send()
+ }
+ else {
+ clearTimeout()
+ clearInterval(intervalID)
+ }
+ }, 5000)
}
-/* If https connection, should be already defined. If not https,*/
-function getPublicKey() {
- /* Check local storage for public key */
- if (window.localStorage.getItem('public-key') === undefined) {
- /* If doesn't exist, generate public and private key pair, store in
- local storage */
- crypto.subtle.generateKey({name:'RSA-OAEP', length: 192}, true, ['encrypt', 'decrypt'])
- .then((keyPair) => {
- /* TODO: Do we need to store the private key as well? */
- window.localStorage.setItem('public-key', keyPair.type.public.toString())
- })
+
+/* Create and send offer -> Send ICE Candidates -> Poll for ICE Candidates */
+getPublicKey().then((cpk) => {
+ console.log('Client: Create and send offer')
+ const cpc = new RTCPeerConnection(conf)
+
+ cpc.oniceconnectionstatechange = () => {
+ console.log('iceConnectionState = ' + cpc.iceConnectionState)
}
- console.log(window.localStorage.getItem('public-key'))
- return window.localStorage.getItem('public-key')
-}
-/* Create, set, and get client Offer. Poll server for host answer.
- Set host answer as client remoteDescription */
-const cpc = new RTCPeerConnection()
-cpc.createOffer().then((offer) => {
- console.log('creating offer which is ' + offer)
- return cpc.setLocalDescription(offer)
-}).then(() => {
- console.log('sessionDescriptionInit = ' + cpc.localDescription)
- const cpk = getPublicKey()
- let offer = {
- cmd: '> sdp pubKey'
- sdp: cpc.localDescription,
- pubKey: cpk
+ cpc.onnegotiationneeded = () => {
+ console.log('negotiation needed!')
+ cpc.createOffer().then((offer) => {
+ return cpc.setLocalDescription(offer)
+ })
+ .then(() => {
+ console.log('Client: Sending offer to host')
+ let offer = {
+ cmd: '> sdp pubKey',
+ sdp: cpc.localDescription,
+ pubKey: cpk.n
+ }
+ return pollServer(window.location, offer, pollServerForAnswer)
+ }).then((serverResponse) => {
+ const answer = JSON.parse(serverResponse)
+ console.log('Client: Polling for ICE candidates')
+ pollServerForICECandidate(cpc, window.location, cpk.n)
+ cpc.setRemoteDescription(answer.sdp)
+ cpc.onicecandidate = (event) => {
+ if (event.candidate) {
+ console.log('Client: Sending ice candidate to host')
+ postServer(window.location, JSON.stringify({
+ cmd: '> ice pubkey',
+ ice: event.candidate,
+ pubKey: cpk.n
+ }))
+ }
+ else {
+ console.log('Client: No more Ice Candidates to send')
+ }
+ }
+
+
+ }).catch( (err) => {
+ console.log('error in sdp handshake: ' + err)
+ })
+ }
+ /* Start data channel */
+ dataChannel = cpc.createDataChannel("sendChannel");
+ dataChannel.onmessage = (msg) => {
+ console.log(msg.data)
}
- /* Poll for answer */
- return pollServer(window.location, offer, pollServerTimeout)
-}).then((answer) => {
- /* TODO: Extract sdp from answer ?*/
- console.log(answer)
- /* State machine to parse answer */
- cpc.setRemoteDescription(answer.sdp)
+ dataChannel.onopen = () => {
+ dataChannel.send(`Hi from the Client`)
+ }
+
})
projects / henge / kiak.git / blobdiff