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.
8 Do this until...? Can be used for either reconnecting or waiting for answer*/
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
, data
, 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 )
36 /* TODO: duplicate in both client.js and host.js */
37 function getPublicKey() {
38 /* Check local storage for public key */
39 if (window
.localStorage
.getItem('public-key') === undefined) {
40 /* If doesn't exist, generate public and private key pair, store in
42 crypto
.subtle
.generateKey({name
:'RSA-OAEP', length
: 192}, true, ['encrypt', 'decrypt'])
44 /* TODO: Do we need to store the private key as well? */
45 window
.localStorage
.setItem('public-key', keyPair
.type
.public.toString())
48 console
.log(window
.localStorage
.getItem('public-key'))
49 return window
.localStorage
.getItem('public-key')
52 /* Create, set, and get client Offer. Poll server for host answer.
53 Set host answer as client remoteDescription */
54 const cpc
= new RTCPeerConnection()
55 cpc
.createOffer().then((offer
) => {
56 console
.log('creating offer which is ' + offer
)
57 return cpc
.setLocalDescription(offer
)
59 console
.log('sessionDescriptionInit = ' + cpc
.localDescription
)
60 const cpk
= getPublicKey()
63 sdp
: cpc
.localDescription
,
67 return pollServer(window
.location
, offer
, pollServerTimeout
)
70 /* TODO: State machine to parse answer */
71 cpc
.setRemoteDescription(answer
.sdp
)