1 document
.title
= "Strapp.io Host"
2 const conf
= {"iceServers": [{ "urls": "stun:stun.1.google.com:19302" }] }
3 const clients
= new Map([])
4 const iceCandidates
= []
8 /* TODO: duplicate in both client.js and host.jhs */
9 function getPublicKey() {
10 return new Promise( (resolve
, reject
) => {
11 /* Check local storage for public key */
12 if (!window
.localStorage
.getItem('public-key')) {
13 console
.log('public key is undefined')
14 /* If doesn't exist, generate public and private key pair, store in
16 crypto
.subtle
.generateKey(
19 publicExponent
: new Uint8Array([0x01, 0x00, 0x01]),
20 hash
: {name
: "SHA-256"}
23 ['encrypt', 'decrypt']
25 /* TODO: Do we need to store the private key as well? */
26 crypto
.subtle
.exportKey('jwk', keyPair
.publicKey
)
27 .then((exportedKey
) => {
28 window
.localStorage
.setItem('publicKey', exportedKey
)
29 console
.log('public key is' + window
.localStorage
.getItem('publicKey'))
36 resolve(window
.localStorage
.getItem('publicKey'))
41 function handleNewClientConnection(offer
) {
42 /* New Client Connection*/
43 hpc
= new RTCPeerConnection(conf
)
45 clients
.set(offer
.pubKey
, hpc
)
46 hpc
.setRemoteDescription(offer
.sdp
)
48 hpc
.createAnswer().then((answer
) => {
49 return hpc
.setLocalDescription(answer
)
52 getPublicKey().then((hpk
) => {
53 hpc
.onicecandidate
= (event
) => {
54 if (event
.candidate
) {
55 iceCandidates
.push(JSON
.stringify({
58 hostPubKey
: hpk
.n
, /* TODO: do we need to send this? */
59 clientPubKey
: offer
.pubKey
,
60 iceCandidateAvailable
: true
64 console
.log('Host: Finished sending ICE candidates')
67 console
.log('Host: Sending answer to Client')
68 wsock
.send(JSON
.stringify({
70 sdp
: hpc
.localDescription
,
72 clientPubKey
: offer
.pubKey
74 hpc
.ondatachannel
= (evt
) => {
75 dataChannel
= evt
.channel
77 dataChannel
.onmessage
= (msg
) => {
80 dataChannel
.send('Hi from the host')
82 hpc
.oniceconnectionstatechange
= () => {
83 console
.log('iceConnectionState = ' + hpc
.iceConnectionState
)
87 console
.log(`error in host answer ${err}`)
95 function handleNewIceSubmission(msg
) {
96 console
.log('Host: Adding new ice candidate')
97 const hpc
= clients
.get(msg
.pubKey
)
98 let candidate
= new RTCIceCandidate(msg
.ice
)
99 hpc
.addIceCandidate(candidate
)
102 function handleIceRequest(msg
) {
103 console
.log('Host: Sending ice candidate to client')
104 const hpc
= clients
.get(msg
)
105 const iceCandidates
= iceCandidates
.pop()
106 if (iceCandidate
!== undefined) {
107 wsock
.send(iceCandidate
)
109 wsock
.send('no ice candidates')
113 if ("WebSocket" in window
) {
114 document
.addEventListener('DOMContentLoaded', (event
) => {
115 wsock
= new WebSocket(`${_strapp_protocol}://${window.location.hostname}:${_strapp_port}`)
116 wsock
.onopen
= () => {
117 console
.log(`Strapped to ${_strapp_protocol}://${window.location.hostname}:${_strapp_port}`)
120 wsock
.onmessage
= (serverMsg
) => {
121 /* msg is either offer or ice candidate or ice candidate request*/
124 let msg
= JSON
.parse(serverMsg
.data
)
126 const clientID
= msg
.pubKey
|| msg
128 /* TODO: redo this trash */
129 if (clients
.has(clientID
)) {
131 handleNewIceSubmission(msg
)
132 } else if (msg
.sdp
) {
133 //handleRepeatedOffer
135 handleIceRequest(msg
)
140 console
.log('Host: Client that doesnt exist is sending ice submissions')
141 } else if (msg
.sdp
) {
142 handleNewClientConnection(msg
)
144 console
.log('Host: Client that doesnt exist is sending ice requests')
151 document
.addEventListener('DOMContentLoaded', () => {
152 document
.body
.innerHTML
= 'Websockets not supported in your browser'