working on client-server communication

[henge/kiak.git] / client.js

diff --git a/client.js b/client.js
index 69ac81e..8989989 100644 (file)
--- a/client.js
+++ b/client.js
@@ -8,25 +8,28 @@ document.body = body
    Do this until...? Can be used for either reconnecting or waiting for answer*/
 function pollServerTimeout(url, data, resolve, reject) {
   console.log('Polling server with offer ' + data)
-  const request = XMLHttpRequest()
+  const request = new XMLHttpRequest()
   request.open('GET', url)
   request.setRequestHeader('Content-Type', 'application/json' )
+  request.setRequestHeader('X-Strapp-Type', 'o' )
   request.onreadystatechange = () => {
     if (request.status === 200) {
-      console.log('recieved answer from host ' + request.response)
+      console.log(request.response)
       resolve(request.response)
     }
     else if (request.status === 504) {
+      console.log('timed out, resending')
       pollServerTimeout(url, data, resolve, reject)
     }
     else {
-      reject('server errored out with ' + request.status)
+      reject('server unhandled response of status ' + request.status)
     }
   }
-  request.send(data)
+  console.log(data)
+  request.send('data in stufff and stuff in data')
 }
 
-/* TODO: Possible to pass resolve/reject to functions? */
+/* TODO: All this does is wrap a function in a promise */
 function pollServer(url, clientPubKey, func) {
   return new Promise((resolve, reject) => {
     func(url, clientPubKey, resolve, reject )
@@ -35,38 +38,60 @@ function pollServer(url, clientPubKey, func) {
 
 /* TODO: duplicate in both client.js and host.js */
 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')
+  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)
+          })
+
+        })
+    }
+    else {
+      resolve(window.localStorage.getItem('publicKey'))
+    }
+  })
+
 }
 
 /* Create, set, and get client Offer. Poll server for host answer.
    Set host answer as client remoteDescription */
 const cpc = new RTCPeerConnection()
+console.log('creating offer')
 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) => {
-  console.log(answer)
-  /* TODO: State machine to parse answer */
-  cpc.setRemoteDescription(answer.sdp)
+  getPublicKey().then((cpk) => {
+    console.log('cpk is' + cpk)
+    let offer = {
+      cmd: '> sdp pubKey',
+      sdp: cpc.localDescription,
+      pubKey: cpk
+    }
+    /* Poll for answer */
+    return pollServer(window.location, offer, pollServerTimeout)
+  }).then((answer) => {
+    //console.log(answer)
+    /* TODO: State machine to parse answer */
+    cpc.setRemoteDescription(answer.sdp)
+  }).catch( (err) => {
+    console.log('error in sdp handshake: ' + err)
+  })
 })