Reviewed WSF_REQUEST.item (..) and items to look into Form, Query, and Path (cookie are excluded for security)

Added WSF_REQUEST.path_parameter (a_name): detachable WSF_VALUE
   - fill path_parameters using `import_raw_path_parameters"
     when executing the route
   - reset to previous value with reset_path_parameters (..),
     just in case the request is executed via severals routes.

library/server/wsf/router/uri/wsf_uri_handler_context.e

@@ -26,6 +26,18 @@ feature {NONE} -- Initialization
 			path := p
 		end
 
+feature -- Request data
+
+	apply (req: WSF_REQUEST)
+			-- <Precursor>
+		do
+		end
+
+	revert (req: WSF_REQUEST)
+			-- <Precursor>
+		do
+		end
+
 feature -- Item		
 
 	item (a_name: READABLE_STRING_32): detachable WSF_VALUE

library/server/wsf/router/uri_template/wsf_uri_template_handler_context.e

@@ -43,6 +43,24 @@ feature -- Access
 
 	uri_template_match: URI_TEMPLATE_MATCH_RESULT
 
+feature -- Environment
+
+	old_path_parameters: detachable ITERABLE [WSF_VALUE]
+
+	apply (req: WSF_REQUEST)
+			-- <Precursor>
+		do
+			old_path_parameters := req.path_parameters
+			req.import_raw_path_parameters (uri_template_match.path_variables)
+		end
+
+	revert (req: WSF_REQUEST)
+			-- <Precursor>
+		do
+			if attached old_path_parameters as vals then
+				req.reset_path_parameters (vals)
+			end
+		end
 
 feature -- Item
 

library/server/wsf/router/wsf_handler_context.e

@@ -27,6 +27,20 @@ feature -- Access
 	path: READABLE_STRING_8
 			-- Associated path
 
+feature -- Request data
+
+	apply (req: WSF_REQUEST)
+			-- Apply current data to request `req'
+			--| mainly to fill {WSF_REQUEST}.path_parameters
+		deferred
+		end
+
+	revert (req: WSF_REQUEST)
+			-- Revert potential previous `apply' for request `req'
+			--| mainly to restore previous {WSF_REQUEST}.path_parameters
+		deferred
+		end
+
 feature -- Url Query
 
 	script_absolute_url (a_path: STRING): STRING

library/server/wsf/router/wsf_router.e

@@ -144,9 +144,16 @@ feature -- Execution
 			-- Process route `a_route'
 		require
 			a_route_attached: a_route /= Void
+		local
+			ctx: C
 		do
 			pre_route_execution_actions.call ([a_route])
-			a_route.handler.execute (a_route.context, req, res)
+			ctx := a_route.context
+			ctx.apply (req)
+			a_route.handler.execute (ctx, req, res)
+			ctx.revert (req)
+		rescue
+			a_route.context.revert (req)
 		end
 
 	dispatch (req: WSF_REQUEST; res: WSF_RESPONSE): BOOLEAN