If-Match implemented in skeleton handler

library/server/wsf/router/wsf_previous_policy.e

@@ -0,0 +1,40 @@
+note
+
+	description: "[
+						Policies for deciding if a resource that currently doesn't exist used to do so.
+						This default implementation assumes that no resources used to exist.
+						]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class WSF_PREVIOUS_POLICY
+
+feature -- Access
+
+	resource_previously_existed (req: WSF_REQUEST) : BOOLEAN
+			-- Did `req.path_translated' exist previously?
+		require
+			req_attached: req /= Void
+		do
+			-- No. Override if this is not want you want.
+		end
+
+	resource_moved_permanently (req: WSF_REQUEST) : BOOLEAN
+			-- Was `req.path_translated' moved permanently?
+		require
+			req_attached: req /= Void
+			previously_existed: resource_previously_existed (req)
+		do
+			-- No. Override if this is not want you want.
+		end
+
+	resource_moved_temporarily (req: WSF_REQUEST) : BOOLEAN
+			-- Was `req.path_translated' moved temporarily?
+		require
+			req_attached: req /= Void
+			previously_existed: resource_previously_existed (req)
+		do
+			-- No. Override if this is not want you want.
+		end
+
+end