document.title = "Strapp.io Client"
body.appendChild(root)
document.body = body
+
+/* Poll the server. Send get request, wait for timeout, send another request.
+ Do this until...? */
+function pollServerTimeout(url, data, resolve, reject) {
+ console.log('Polling server with offer ' + data)
+ const request = XMLHttpRequest()
+ request.open('GET', url)
+ request.setRequestHeader('Content-Type', 'application/json' )
+ request.onreadystatechange = () => {
+ if (request.status === 200) {
+ console.log('recieved answer from host ' + request.response)
+ resolve(request.response)
+ }
+ else if (request.status === 504) {
+ pollServerTimeout(url, resolve, reject)
+ }
+ else {
+ reject('server errored out with ' + request.status)
+ }
+ }
+ request.send(data)
+}
+
+/* TODO: Possible to pass resolve/reject to functions? */
+function pollServer(url, clientPubKey, func) {
+ return new Promise((resolve, reject) => {
+ func(url, clientPubKey, resolve, reject )
+ })
+}
+/* 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())
+ })
+ }
+ 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
+ }
+ /* 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)
+})
projects / henge / kiak.git / commitdiff