Set the request cookies property to an empty dict if cookie parsing fails

This commit reverses the bug introduced in commit 4a4d871, leaving an
undefined cookies property on failure to parse a request cookie.

The bug results in a 'NoneType is not iterable' error when calling
RequestHandler.get_cookie() after a cookie parsing exception.

diff --git a/tornado/httpserver.py b/tornado/httpserver.py
index e692ba8a9ca34691fb389a1bc6e2cb7fec800635..3e985ba6c7f9dc023061c6d6000984c6c13a4eaf 100644 (file)
--- a/tornado/httpserver.py
+++ b/tornado/httpserver.py
@@ -407,7 +407,7 @@ class HTTPRequest(object):
                     self._cookies.load(
                         native_str(self.headers["Cookie"]))
                 except Exception:
-                    self._cookies = None
+                    self._cookies = {}
         return self._cookies
 
     def write(self, chunk, callback=None):