From 3d20cabf40d677e20ed7df7f01cb3a16a2a14fa1 Mon Sep 17 00:00:00 2001
From: Pierre Ossman <ossman@cendio.se>
Date: Thu, 25 Jan 2018 15:46:41 +0100
Subject: [PATCH] Fix handling of closed proxy socket

Regression caused by a29946e9. We were no longer detecting a cleanly
closed proxy socket. This is not a WebSocket, but an ordinary one,
so we should be checking for "" rather that None.
---
 websockify/websocketproxy.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/websockify/websocketproxy.py b/websockify/websocketproxy.py
index 6aa76e6..6c17c10 100644
--- a/websockify/websocketproxy.py
+++ b/websockify/websocketproxy.py
@@ -231,7 +231,7 @@ Traffic Legend:
             if target in ins:
                 # Receive target data, encode it and queue for client
                 buf = target.recv(self.buffer_size)
-                if buf is None:
+                if len(buf) == 0:
                     if self.verbose:
                         self.log_message("%s:%s: Target closed connection",
                                 self.server.target_host, self.server.target_port)