body.appendChild(root)
document.body = body
const conf = {"iceServers": [{ "urls": "stun:stun.1.google.com:19302" }] }
+let dataChannel
/* 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')) {
- 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)
- })
+ 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'))
- }
- })
+ })
+ }
+ else {
+ resolve(window.localStorage.getItem('publicKey'))
+ }
+})
}
request.send(data)
}
-/* TODO: All this does is wrap a function in a promise */
+/* 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*/
+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)
request.onreadystatechange = () => {
if (request.status === 200) {
if(request.readyState === 4) {
- console.log('Client: Recieved response from Host')
+ console.log('Client: Recieved Answer from Host')
console.log(request)
resolve(request.response)
}
}
else if (request.status === 504) {
console.log('timed out, resending')
- pollServerTimeout(url, data, resolve, reject)
+ pollServerForAnswer(url, data, resolve, reject)
}
else {
reject('server unhandled response of status ' + request.status)
}
/* Poll server for ice candidates until ice is complete */
-function pollServerForICECandidate(cpc) {
- window.setInterval(() => {
- if (cpc.iceGatheringState !== 'complete') {
- return new Promise((resolve, reject) => {
- console.log('Client: Requesting ICE Candidates from server')
- const request = new XMLHttpRequest()
- request.open('GET', window.location, true)
- request.setRequestHeader('Content-Type', 'application/json' )
- request.setRequestHeader('X-Strapp-Type', 'ice-candidate-request')
- request.onreadystatechange = () => {
- if (request.status === 200) {
- if(request.readyState === 4) {
- console.log('Client: Recieved ICE Candidate from Host')
- resolve(request.response)
- }
- }
- else if (request.status === 204) {
- console.log('Ice Candidate unavailable, trying again in one second')
- }
- else {
- reject('server unhandled response of status ' + request.status)
- }
- }
- request.send(cpc.pubKey)
- }).then((response) => {
- console.log('Client: Adding Ice Candidate ')
- cpc.addIceCandidate(response.candidate)
- }).catch((err) => {
- console.log('pollServerForICECandidate: ' + err)
- })
+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)
}
- }, 2000)
+ }, 5000)
}
-/* Create, set, and get client Offer. Poll server for host answer.
- Set host answer as client remoteDescription */
+/* 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)
- /* Start data channel */
- sendChannel = cpc.createDataChannel("sendChannel");
- sendChannel.onopen = () => {
- console.log('client data channel on line')
- sendChannel.onmessage = (message) => {
- console.log(message.data)
- }
- sendChannel.send('Hi from the Client')
- };
- /* Start polling for ice candidate */
-
- console.log(cpc.iceConnectionState)
cpc.oniceconnectionstatechange = () => {
console.log('iceConnectionState = ' + cpc.iceConnectionState)
}
-
-
cpc.onnegotiationneeded = () => {
+ console.log('negotiation needed!')
cpc.createOffer().then((offer) => {
return cpc.setLocalDescription(offer)
})
return pollServer(window.location, offer, pollServerForAnswer)
}).then((serverResponse) => {
const answer = JSON.parse(serverResponse)
- console.log('Client: received host answer')
- cpc.setRemoteDescription(answer.sdp).then(() => {
- console.log('Client: Polling for ICE candidates')
- pollServerForICECandidate(cpc)
- })
+ 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')
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)
+ }
+ dataChannel.onopen = () => {
+ dataChannel.send(`Hi from the Client`)
+ }
+
})
projects / henge / kiak.git / blobdiff