Merge pull request Lawouach#53 from EliAndrewC/master

Lawouach · Lawouach · commit 482d4f0cd1bd · 2012-08-09T07:19:06.000-07:00
Minor fix which turns an unintentional and confusing error message into the intended error message
diff --git a/ws4py/server/cherrypyserver.py b/ws4py/server/cherrypyserver.py
@@ -123,7 +123,7 @@ def upgrade(self, protocols=None, extensions=None, version=WS_VERSION, handler_c
 
         for key, expected_value in [('Upgrade', 'websocket'),
                                      ('Connection', 'upgrade')]:
-            actual_value = request.headers.get(key).lower()
+            actual_value = request.headers.get(key, '').lower()
             if not actual_value:
                 raise HandshakeError('Header %s is not defined' % key)
             if expected_value not in actual_value:
