client: Do not include WebRTC offers with 'stopped' announce event (fix #132)

lib/client/websocket-tracker.js

@@ -45,22 +45,27 @@ WebSocketTracker.prototype.announce = function (opts) {
     return self.socket.once('connect', self.announce.bind(self, opts))
   }
 
+  var params = extend(opts, {
+    action: 'announce',
+    info_hash: self.client._infoHashBinary,
+    peer_id: self.client._peerIdBinary
+  })
+  if (self._trackerId) params.trackerid = self._trackerId
+
+  if (opts.event === 'stopped') {
+    // Don't include offers with 'stopped' event
+    self._send(params)
+  } else {
     // Limit the number of offers that are generated, since it can be slow
     var numwant = Math.min(opts.numwant, 10)
 
     self._generateOffers(numwant, function (offers) {
-    var params = extend(opts, {
+      params.numwant = numwant
-      action: 'announce',
+      params.offers = offers
-      numwant: numwant,
-      info_hash: self.client._infoHashBinary,
-      peer_id: self.client._peerIdBinary,
-      offers: offers
-    })
-    if (self._trackerId) params.trackerid = self._trackerId
-
       self._send(params)
     })
   }
+}
 
 WebSocketTracker.prototype.scrape = function (opts) {
   var self = this
@@ -337,6 +342,7 @@ WebSocketTracker.prototype._generateOffers = function (numwant, cb) {
   for (var i = 0; i < numwant; ++i) {
     generateOffer()
   }
+  checkDone()
 
   function generateOffer () {
     var offerId = hat(160)