Added a cache_expires method. Don't create CacheControl objects when it isn't necessary. Handle timedeltas in any date-related function (considering them relative to now). Allow cache_control.private = True. Add constants for different kinds of time, so you can multiply and add them to create timedelta objects

1 files changed, 2 insertions, 0 deletions

diff --git a/webob/cachecontrol.py b/webob/cachecontrol.py
index 88f6873..2482f0c 100644
--- a/webob/cachecontrol.py
+++ b/webob/cachecontrol.py
@@ -50,6 +50,8 @@ class value_property(object):
         if value == self.default:
             if self.prop in obj.properties:
                 del obj.properties[self.prop]
+        elif value is True:
+            obj.properties[self.prop] = None # Empty value, but present
         else:
             obj.properties[self.prop] = value
     def __del__(self, obj):