Merge pull request #166 from xoviat/patch-1

adapater: recover from zlib.error.

Author: ionrock

cachecontrol/adapter.py

@@ -1,5 +1,6 @@
 import types
 import functools
+import zlib
 
 from requests.adapters import HTTPAdapter
 
@@ -37,7 +38,10 @@ def send(self, request, cacheable_methods=None, **kw):
         """
         cacheable = cacheable_methods or self.cacheable_methods
         if request.method in cacheable:
-            cached_response = self.controller.cached_request(request)
+            try:
+                cached_response = self.controller.cached_request(request)
+            except zlib.error:
+                cached_response = None
             if cached_response:
                 return self.build_response(request, cached_response,
                                            from_cache=True)