Implemented more user friendly WSF_RESPONSE

i.e allow to change the status code and the header as long as no content is really sent back to the client

This requires an addition WGI_RESPONSE, new post_commit_action: PROCEDURE [...]

library/server/ewsgi/connectors/cgi/src/wgi_cgi_connector.e

@@ -44,6 +44,7 @@ feature -- Execution
 				create req.make ((create {EXECUTION_ENVIRONMENT}).starting_environment_variables, create {WGI_CGI_INPUT_STREAM}.make, Current)
 				create res.make (create {WGI_CGI_OUTPUT_STREAM}.make, create {WGI_CGI_ERROR_STREAM}.make)
 				service.execute (req, res)
+				res.push
 			else
 				if attached (create {EXCEPTION_MANAGER}).last_exception as e and then attached e.exception_trace as l_trace then
 					if res /= Void then
@@ -53,6 +54,7 @@ feature -- Execution
 						if res.message_writable then
 							res.put_string ("<pre>" + l_trace + "</pre>")
 						end
+						res.push
 					end
 				end
 			end

library/server/ewsgi/connectors/libfcgi/src/wgi_libfcgi_connector.e

@@ -65,6 +65,7 @@ feature -- Execution
 				create req.make (vars, a_input, Current)
 				create res.make (a_output, a_output)
 				service.execute (req, res)
+				res.push
 			else
 				if attached (create {EXCEPTION_MANAGER}).last_exception as e and then attached e.exception_trace as l_trace then
 					if res /= Void then
@@ -74,6 +75,7 @@ feature -- Execution
 						if res.message_writable then
 							res.put_string ("<pre>" + l_trace + "</pre>")
 						end
+						res.push
 					end
 				end
 			end

library/server/ewsgi/connectors/nino/src/wgi_nino_connector.e

@@ -133,10 +133,10 @@ feature -- Server
 			res: detachable WGI_NINO_RESPONSE_STREAM
 		do
 			create req.make (env, create {WGI_NINO_INPUT_STREAM}.make (a_socket), Current)
-			create res.make (create {WGI_NINO_OUTPUT_STREAM}.make (a_socket), Void)
+			create res.make (create {WGI_NINO_OUTPUT_STREAM}.make (a_socket), create {WGI_NINO_ERROR_STREAM}.make_stderr (a_socket.descriptor.out))
 			req.set_meta_string_variable ("RAW_HEADER_DATA", a_headers_text)
 			service.execute (req, res)
-			res.commit
+			res.push
 		end
 
 note

library/server/ewsgi/connectors/nino/src/wgi_nino_error_stream.e

@@ -0,0 +1,70 @@
+note
+	description: "Summary description for WGI_CGI_ERROR_STREAM."
+	legal: "See notice at end of class."
+	status: "See notice at end of class."
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	WGI_NINO_ERROR_STREAM
+
+inherit
+	WGI_ERROR_STREAM
+
+create
+	make,
+	make_stderr,
+	make_stdout
+
+feature {NONE} -- Initialization
+
+	make (a_identifier: READABLE_STRING_8; a_file: PLAIN_TEXT_FILE)
+		do
+			identifier := a_identifier
+			output := a_file
+		end
+
+	make_stderr (a_identifier: READABLE_STRING_8)
+		do
+			make (a_identifier, io.error)
+		end
+
+	make_stdout (a_identifier: READABLE_STRING_8)
+		do
+			make (a_identifier, io.error)
+		end
+
+feature -- Access
+
+	identifier: READABLE_STRING_8
+
+	output: FILE
+
+feature -- Error
+
+	put_error (a_message: READABLE_STRING_8)
+		local
+			s: STRING
+		do
+			create s.make (a_message.count + identifier.count + 4)
+			s.append_character ('[')
+			s.append (identifier)
+			s.append_character (']')
+			s.append_character (' ')
+			s.append (a_message)
+			s.append_character ('%N')
+				-- Display it at once.
+			output.put_string (s)
+		end
+
+note
+	copyright: "2011-2011, Eiffel Software and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+	source: "[
+			Eiffel Software
+			5949 Hollister Ave., Goleta, CA 93117 USA
+			Telephone 805-685-1006, Fax 805-685-6869
+			Website http://www.eiffel.com
+			Customer support http://support.eiffel.com
+		]"
+end

library/server/ewsgi/specification/response/wgi_filter_response.e

@@ -17,6 +17,7 @@ feature {NONE} -- Initialization
 	make_with_response (res: WGI_RESPONSE)
 		do
 			wgi_response := res
+			res.set_post_commit_action (agent commit)
 		end
 
 	wgi_response: WGI_RESPONSE
@@ -26,7 +27,7 @@ feature {WGI_CONNECTOR, WGI_SERVICE} -- Commit
 	commit
 			-- Commit the current response
 		do
-			-- do nothing, this will be done internal on the original `wgi_response' object
+			wgi_response.set_post_commit_action (Void)
 		end
 
 feature -- Status report
@@ -129,7 +130,7 @@ feature -- Error reporting
 		end
 
 note
-	copyright: "2011-2012, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2013, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software

library/server/ewsgi/specification/response/wgi_response.e

@@ -8,6 +8,15 @@ deferred class
 
 feature {WGI_CONNECTOR, WGI_SERVICE} -- Commit
 
+	push
+			-- Commit and push response
+		do
+			commit
+			if attached post_commit_action as act then
+				act.call (Void)
+			end
+		end
+
 	commit
 			-- Commit the current response
 		deferred
@@ -17,6 +26,21 @@ feature {WGI_CONNECTOR, WGI_SERVICE} -- Commit
 			message_committed: message_committed
 		end
 
+feature -- Access: commit
+
+	post_commit_action: detachable PROCEDURE [ANY, TUPLE]
+			-- Action associated with the final `commit' execution
+			-- Note: useful to trigger action just after the
+			--       response is transfered to the client.
+
+feature -- Change: commit
+
+	set_post_commit_action (act: like post_commit_action)
+			-- Assign `act' to `post_commit_action'
+		do
+			post_commit_action := act
+		end
+
 feature -- Status report
 
 	status_committed: BOOLEAN
@@ -131,7 +155,7 @@ feature -- Error reporting
 		end
 
 note
-	copyright: "2011-2012, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
+	copyright: "2011-2013, Jocelyn Fiat, Javier Velilla, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software