From 9fa7da60b994d06a8af9dad3b3df711afd566057 Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Mon, 3 Oct 2016 15:38:42 +0200
Subject: [PATCH] confirm that a socket is ready to send before sending

---
 NetfluxWebsocketSrv.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/NetfluxWebsocketSrv.js b/NetfluxWebsocketSrv.js
index 98d79f72f..a96e41f2d 100644
--- a/NetfluxWebsocketSrv.js
+++ b/NetfluxWebsocketSrv.js
@@ -14,7 +14,12 @@ let historyKeeperKeys = {};
 
 const now = function () { return (new Date()).getTime(); };
 
+const socketSendable = function (socket) {
+    return socket && socket.readyState === 1;
+};
+
 const sendMsg = function (ctx, user, msg) {
+    if (!socketSendable(user.socket)) { return; }
     try {
         if (ctx.config.logToStdout) { console.log('<' + JSON.stringify(msg)); }
         user.socket.send(JSON.stringify(msg));