From 573d1da0efa1812b78a137a78e28b5db8cbb8559 Mon Sep 17 00:00:00 2001
From: Eli Uriegas <seemethere101@gmail.com>
Date: Tue, 17 Jan 2017 18:28:22 -0600
Subject: [PATCH] Fixes write_error loop from bail_out function

Fixes stack-overflow found in #307
---
 sanic/server.py | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/sanic/server.py b/sanic/server.py
index 711117dc..a36c47aa 100644
--- a/sanic/server.py
+++ b/sanic/server.py
@@ -1,4 +1,5 @@
 import asyncio
+import traceback
 from functools import partial
 from inspect import isawaitable
 from signal import SIGINT, SIGTERM
@@ -189,9 +190,15 @@ class HttpProtocol(asyncio.Protocol):
                 "Writing error failed, connection closed {}".format(e))
 
     def bail_out(self, message):
-        exception = ServerError(message)
-        self.write_error(exception)
-        log.error(message)
+        if self.transport.is_closing():
+            log.error(
+                "Connection closed before error was sent to user @ {}".format(
+                    self.transport.get_extra_info('peername')))
+            log.debug('Error experienced:\n{}'.format(traceback.format_exc()))
+        else:
+            exception = ServerError(message)
+            self.write_error(exception)
+            log.error(message)
 
     def cleanup(self):
         self.parser = None