1 const body
= document
.createElement('body')
2 const root
= document
.createElement('div')
3 document
.title
= "Strapp.io Client"
7 /* Poll the server. Send get request, wait for timeout, send another request.
9 function pollServerTimeout(url
, data
, resolve
, reject
) {
10 console
.log('Polling server with offer ' + data
)
11 const request
= XMLHttpRequest()
12 request
.open('GET', url
)
13 request
.setRequestHeader('Content-Type', 'application/json' )
14 request
.onreadystatechange
= () => {
15 if (request
.status
=== 200) {
16 console
.log('recieved answer from host ' + request
.response
)
17 resolve(request
.response
)
19 else if (request
.status
=== 504) {
20 pollServerTimeout(url
, resolve
, reject
)
23 reject('server errored out with ' + request
.status
)
29 /* TODO: Possible to pass resolve/reject to functions? */
30 function pollServer(url, clientPubKey, func) {
31 return new Promise((resolve, reject) => {
32 func(url, clientPubKey, resolve, reject )
35 /* If https connection, should be already defined. If not https,*/
36 function getPublicKey() {
37 /* Check local storage for public key */
38 if (window
.localStorage
.getItem('public-key') === undefined) {
39 /* If doesn't exist, generate public and private key pair, store in
41 crypto
.subtle
.generateKey({name
:'RSA-OAEP', length
: 192}, true, ['encrypt', 'decrypt'])
43 /* TODO: Do we need to store the private key as well? */
44 window
.localStorage
.setItem('public-key', keyPair
.type
.public.toString())
47 console
.log(window
.localStorage
.getItem('public-key'))
48 return window
.localStorage
.getItem('public-key')
51 /* Create, set, and get client Offer. Poll server for host answer.
52 Set host answer as client remoteDescription */
53 const cpc
= new RTCPeerConnection()
54 cpc
.createOffer().then((offer
) => {
55 console
.log('creating offer which is ' + offer
)
56 return cpc
.setLocalDescription(offer
)
58 console
.log('sessionDescriptionInit = ' + cpc
.localDescription
)
59 const cpk
= getPublicKey()
62 sdp
: cpc
.localDescription
,
66 return pollServer(window
.location
, offer
, pollServerTimeout
)
68 /* TODO: Extract sdp from answer ?*/
70 /* State machine to parse answer */
71 cpc
.setRemoteDescription(answer
.sdp
)