From 098b79a8bfba97ff757f425a9b83fa893db42262 Mon Sep 17 00:00:00 2001
From: 38elements <mh19820223@gmail.com>
Date: Thu, 4 May 2017 23:43:17 +0900
Subject: [PATCH] Add troubleshooting.md

---
 docs/index.rst                |  1 +
 docs/sanic/troubleshooting.md | 54 +++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 docs/sanic/troubleshooting.md

diff --git a/docs/index.rst b/docs/index.rst
index 80e7e70f..035b2708 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -24,6 +24,7 @@ Guides
    sanic/testing
    sanic/deploying
    sanic/extensions
+   sanic/troubleshooting
    sanic/contributing
 
 
diff --git a/docs/sanic/troubleshooting.md b/docs/sanic/troubleshooting.md
new file mode 100644
index 00000000..e8cfec01
--- /dev/null
+++ b/docs/sanic/troubleshooting.md
@@ -0,0 +1,54 @@
+# Troubleshooting
+
+## ERROR: NoneType: None in console
+
+The message `ERROR: NoneType: None` is caused by timeout error caused by request not occuring in Keep-Alive.
+There are two methods not to display a message.
+
+* Invalidating Keep-Alive.
+
+```python
+from sanic.config import Config
+Config.KEEP_ALIVE = False
+```
+
+* Setting custom protocol.
+
+```python
+from time import time
+from sanic import Sanic
+from sanic.response import json
+from sanic.config import Config
+from sanic.server import HttpProtocol
+from sanic.exceptions import RequestTimeout
+
+
+class CustomHttpProtocol(HttpProtocol):
+
+    def connection_timeout(self):
+        current_time = time()
+        time_elapsed = current_time - self._last_request_time
+        if time_elapsed < self.request_timeout:
+            time_left = self.request_timeout - time_elapsed
+            self._timeout_handler = ( 
+                self.loop.call_later(time_left, self.connection_timeout))
+        else:
+            if self._request_handler_task:
+                self._request_handler_task.cancel()
+            if self._total_request_size == 0:
+                self.transport.close()
+            else:
+                exception = RequestTimeout('Request Timeout')
+                self.write_error(exception)
+
+
+app = Sanic()
+
+
+@app.route("/")
+async def handler(request):
+        return json({"hello": "world"})
+
+if __name__ == "__main__":
+    app.run(host="127.0.0.1", port=8000, protocol=CustomHttpProtocol)
+```