remove wrtc dependency

For #303

client.js

@@ -25,6 +25,7 @@ inherits(Client, EventEmitter)
  * @param {Number} opts.numWant    number of peers to request
  * @param {Number} opts.interval   announce interval (in ms)
  * @param {Number} opts.rtcConfig  RTCPeerConnection configuration object
+ * @param {Number} opts.wrtc       custom webrtc implementation
  */
 function Client (peerId, port, torrent, opts) {
   var self = this
@@ -42,6 +43,9 @@ function Client (peerId, port, torrent, opts) {
     : new Buffer(torrent.infoHash, 'hex')
   self.torrentLength = torrent.length
 
+  self._rtcConfig = opts.rtcConfig
+  self._wrtc = opts.wrtc
+
   // optional
   self._numWant = opts.numWant || common.DEFAULT_ANNOUNCE_PEERS
   self._intervalMs = opts.interval || common.DEFAULT_ANNOUNCE_INTERVAL
@@ -51,9 +55,11 @@ function Client (peerId, port, torrent, opts) {
   if (typeof torrent.announce === 'string') torrent.announce = [ torrent.announce ]
   if (torrent.announce == null) torrent.announce = []
 
+  var trackerOpts = { interval: self._intervalMs }
+  var webrtcSupport = !!self._wrtc || typeof window !== 'undefined'
+
   self._trackers = torrent.announce
     .map(function (announceUrl) {
-      var trackerOpts = { interval: self._intervalMs }
       var protocol = url.parse(announceUrl).protocol
 
       if ((protocol === 'http:' || protocol === 'https:') &&
@@ -61,8 +67,7 @@ function Client (peerId, port, torrent, opts) {
         return new HTTPTracker(self, announceUrl, trackerOpts)
       } else if (protocol === 'udp:' && typeof UDPTracker === 'function') {
         return new UDPTracker(self, announceUrl, trackerOpts)
-      } else if ((protocol === 'ws:' || protocol === 'wss:') &&
-          WebSocketTracker.supported) {
+      } else if ((protocol === 'ws:' || protocol === 'wss:') && webrtcSupport) {
         return new WebSocketTracker(self, announceUrl, trackerOpts)
       }
       return null

lib/websocket-tracker.js

@@ -9,16 +9,6 @@ var inherits = require('inherits')
 var Peer = require('simple-peer')
 var Socket = require('simple-websocket')
 
-var wrtc
-try {
-  wrtc = require('wrtc') // WebRTC in node - empty object in browser
-  if (!wrtc.RTCPeerConnection) wrtc = null
-} catch (err) {
-  wrtc = null // optional dependency failed to install
-}
-
-var WEBRTC_SUPPORT = !!wrtc || typeof window !== 'undefined'
-
 var common = require('./common')
 
 // It turns out that you can't open multiple websockets to the same server within one
@@ -48,8 +38,6 @@ function WebSocketTracker (client, announceUrl, opts) {
   self._socket.on('data', self._onSocketData.bind(self))
 }
 
-WebSocketTracker.supported = WEBRTC_SUPPORT
-
 WebSocketTracker.prototype.announce = function (opts) {
   var self = this
   if (!self._socket.connected) {
@@ -138,7 +126,11 @@ WebSocketTracker.prototype._onSocketData = function (data) {
 
   var peer
   if (data.offer) {
-    peer = new Peer({ trickle: false, config: self._opts.rtcConfig, wrtc: wrtc })
+    peer = new Peer({
+      trickle: false,
+      config: self.client._rtcConfig,
+      wrtc: self.client._wrtc
+    })
     peer.id = common.binaryToHex(data.peer_id)
     peer.once('signal', function (answer) {
       var params = {
@@ -188,8 +180,8 @@ WebSocketTracker.prototype._generateOffers = function (numWant, cb) {
     var peer = self._peers[offerId] = new Peer({
       initiator: true,
       trickle: false,
-      config: self._opts.rtcConfig,
-      wrtc: wrtc
+      config: self.client._rtcConfig,
+      wrtc: self.client._wrtc
     })
     peer.once('signal', function (offer) {
       offers.push({

package.json

@@ -14,8 +14,7 @@
     "./lib/common-node": false,
     "./lib/http-tracker": false,
     "./lib/udp-tracker": false,
-    "./server": false,
-    "wrtc": false
+    "./server": false
   },
   "bugs": {
     "url": "https://github.com/feross/bittorrent-tracker/issues"
@@ -64,8 +63,5 @@
   },
   "scripts": {
     "test": "standard && tape test/*.js"
-  },
-  "optionalDependencies": {
-    "wrtc": "0.0.55"
   }
 }