From bfcba853366c76940b4cd2ed27bb30e9cfb1a968 Mon Sep 17 00:00:00 2001
From: Luciano Iam <lucianito@gmail.com>
Date: Sun, 12 Apr 2020 14:51:54 +0200
Subject: [PATCH] WebSockets: throw error if trying to send() before open() in
 MessageChannel

---
 share/web_surfaces/shared/channel.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/share/web_surfaces/shared/channel.js b/share/web_surfaces/shared/channel.js
index ae02aad8bd..99a80fd354 100644
--- a/share/web_surfaces/shared/channel.js
+++ b/share/web_surfaces/shared/channel.js
@@ -61,7 +61,11 @@ export class MessageChannel {
 	}
 
 	send (msg) {
-		this.socket.send(msg.toJsonText());
+		if (this.socket) {
+			this.socket.send(msg.toJsonText());
+		} else {
+			throw Error('MessageChannel: cannot call send() before open()');
+		}
 	}
 
 	closeCallback () {