Faster reconnects. Fixes #696

- Lower reconnect timeout to 5m
- Respond to the 'online' event to reconnect immediately
  eg. in case you switched from 3G to Wi-Fi

packages/livedata/stream_client_common.js

@@ -86,8 +86,10 @@ _.extend(Meteor._DdpClientStream.prototype, {
     self.RETRY_BASE_TIMEOUT = 1000;
     // exponential factor to increase timeout each attempt.
     self.RETRY_EXPONENT = 2.2;
-    // maximum time between reconnects.
-    self.RETRY_MAX_TIMEOUT = 1800000; // 30min.
+    // maximum time between reconnects. keep this intentionally
+    // high-ish to ensure a server can recover from a failure caused
+    // by load
+    self.RETRY_MAX_TIMEOUT = 5 * 60000; // 5 minutes
     // time to wait for the first 2 retries.  this helps page reload
     // speed during dev mode restarts, but doesn't hurt prod too
     // much (due to CONNECT_TIMEOUT)
@@ -191,6 +193,12 @@ _.extend(Meteor._DdpClientStream.prototype, {
     return timeout;
   },
 
+  // fired when we detect that we've gone online. try to reconnect
+  // immediately.
+  _online: function () {
+    this.reconnect();
+  },
+
   _retryLater: function () {
     var self = this;
 

packages/livedata/stream_client_sockjs.js

@@ -24,6 +24,10 @@ Meteor._DdpClientStream = function (url) {
 
   self.heartbeatTimer = null;
 
+  //// Listen to global 'online' event
+  if (typeof window !== 'undefined') // if we are running in a browser
+    window.addEventListener("online", _.bind(self._online, self));
+
   //// Kickoff!
   self._launchConnection();
 };