extracting method into response

lib/restfulie/client/cache/http_ext.rb

@@ -59,13 +59,13 @@ def header_value_from(header, expression)
 
   def has_expired_cache?
     return true if headers['date'].nil?
-    max_time = Time.rfc2822(headers['date']) + cache_max_age.seconds
+    max_time = Time.rfc2822(headers['date'][0]) + cache_max_age.seconds
     Time.now > max_time
   end
 
   # checks if the header's max-age is available and no no-store if available.
   def may_cache?
-    may_cache_field?(headers['cache-control'])
+    may_cache_method? && may_cache_field?(headers['cache-control'])
   end
 
   # Returns whether this cache control field allows caching
@@ -113,9 +113,14 @@ def vary_headers_for(request)
     end
   end
 
+  private
+  def may_cache_method?
+    verb == :get || verb == :post
+  end
 end
 
-class Restfulie::Client::HTTP::Response
+class Net::HTTPResponse
   include Restfulie::Client::HTTP::ResponseStatus
   include Restfulie::Client::HTTP::ResponseCacheCheck
+
 end

lib/restfulie/client/cache/restrictions.rb

@@ -4,12 +4,7 @@ class << self
 
       # checks whether this request verb and its cache headers allow caching
       def may_cache?(response)
-        response && may_cache_method?(response.method) && response.may_cache?
-      end
-
-      # only Post and Get requests are cacheable so far
-      def may_cache_method?(verb)
-        verb == :get || verb == :post
+        response && response.may_cache?
       end
 
     end