Merge pull request #186 from OrangeDog/patch-1

Avoid logging "unknown" directives where there aren't any.

Author: ionrock

cachecontrol/controller.py

@@ -84,6 +84,9 @@ def parse_cache_control(self, headers):
         retval = {}
 
         for cc_directive in cc_headers.split(','):
+            if not cc_directive.strip():
+                continue
+            
             parts = cc_directive.split('=', 1)
             directive = parts[0].strip()