Extracted the policy driven classes into their own library for now "wsf_policy_driven.ecf"

Updated the restbucksCRUD example to demonstrate both approaches.

library/server/wsf/policy_driven/wsf_get_helper.e

@@ -0,0 +1,72 @@
+note
+
+	description: "[
+						Policy-driven helpers to implement processing of GET and HEAD requests.
+						]"
+	date: "$Date$"
+	revision: "$Revision$"
+
+class WSF_GET_HELPER
+
+inherit
+
+	WSF_METHOD_HELPER
+
+feature {NONE} -- Implementation
+
+	send_response (req: WSF_REQUEST; res: WSF_RESPONSE; a_handler: WSF_SKELETON_HANDLER; a_header: HTTP_HEADER; a_new_resource: BOOLEAN)
+			-- Write response to `req' into `res' in accordance with `a_media_type' etc.
+			-- Upto four execution variables may be set on `req':
+			-- "NEGOTIATED_MEDIA_TYPE"
+			-- "NEGOTIATED_LANGUAGE"
+			-- "NEGOTIATED_CHARSET"
+			-- "NEGOTIATED_ENCODING"	
+		local
+			l_chunked, l_ok: BOOLEAN
+			l_dt: STRING
+		do
+			a_handler.ensure_content_available (req)
+			l_ok := a_handler.response_ok (req)
+			if l_ok then
+				l_chunked := a_handler.is_chunking (req)
+				if l_chunked then
+					a_header.put_transfer_encoding_chunked
+				else
+					a_header.put_content_length (a_handler.content_length (req).as_integer_32)
+				end
+				if attached req.request_time as l_time then
+					l_dt := (create {HTTP_DATE}.make_from_date_time (l_time)).rfc1123_string
+					a_header.put_header_key_value ({HTTP_HEADER_NAMES}.header_date, l_dt)
+					generate_cache_headers (req, a_handler, a_header, l_time)
+				end
+				l_ok := a_handler.response_ok (req)
+			end
+			if l_ok then
+				res.set_status_code ({HTTP_STATUS_CODE}.ok)
+			else
+				write_error_response (req, res)
+			end
+			if attached a_handler.etag (req) as l_etag then
+				a_header.put_header_key_value ({HTTP_HEADER_NAMES}.header_etag, l_etag)
+			end
+			res.put_header_text (a_header.string)
+			if l_ok then
+				if l_chunked then
+					send_chunked_response (req, res, a_handler, a_header)
+				else
+					res.put_string (a_handler.content (req))
+				end
+			end
+		end
+
+note
+	copyright: "2011-2013, Jocelyn Fiat, Javier Velilla, Olivier Ligot, 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