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Added WSF_RESOURCE_CONTEXT_HANDLER_HELPER

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Jocelyn Fiat
2012-10-04 14:46:28 +02:00
parent 2f6a6cbf5f
commit 737213b44c
1 changed files with 197 additions and 0 deletions
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library/server/wsf/extension/wsf_resource_context_handler_helper.e Normal file
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note
description: "Work in progress Common abstraction to handle RESTfull methods."
author: "Olivier Ligot"
date: "$Date$"
revision: "$Revision$"
deferred class
WSF_RESOURCE_CONTEXT_HANDLER_HELPER [C -> WSF_HANDLER_CONTEXT create make end]
feature -- Basic operations
execute_methods (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Execute request and dispatch according to the request method
local
m: READABLE_STRING_8
do
m := req.request_method.as_upper
if m.same_string ({HTTP_REQUEST_METHODS}.method_get) then
execute_get (ctx, req, res)
elseif m.same_string ({HTTP_REQUEST_METHODS}.method_put) then
execute_put (ctx, req, res)
elseif m.same_string ({HTTP_REQUEST_METHODS}.method_delete) then
execute_delete (ctx, req, res)
elseif m.same_string ({HTTP_REQUEST_METHODS}.method_post) then
execute_post (ctx, req, res)
elseif m.same_string ({HTTP_REQUEST_METHODS}.method_options) then
execute_options (ctx, req, res)
elseif m.same_string ({HTTP_REQUEST_METHODS}.method_head) then
execute_head (ctx, req, res)
else
--| Eventually handle other methods...
execute_extension_method (ctx, req, res)
end
end
feature {NONE} -- Implementation
execute_get (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
do_get (ctx, req, res)
end
do_get (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Using GET to retrieve resource information.
-- If the GET request is SUCCESS, we response with
-- 200 OK, and a representation of the person
-- If the GET request is not SUCCESS, we response with
-- 404 Resource not found
-- If is a Condition GET and the resource does not change we send a
-- 304, Resource not modifed
do
handle_not_implemented ("Method GET not implemented", req, res)
end
execute_post (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
if req.is_chunked_input then
do_post (ctx, req, res)
else
if req.content_length_value > 0 then
do_post (ctx, req, res)
else
handle_bad_request_response ("Bad request, content_length empty", req, res)
end
end
end
do_post (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Here the convention is the following.
-- POST is used for creation and the server determines the URI
-- of the created resource.
-- If the request post is SUCCESS, the server will create the order and will response with
-- HTTP_RESPONSE 201 CREATED, the Location header will contains the newly created order's URI
-- if the request post is not SUCCESS, the server will response with
-- HTTP_RESPONSE 400 BAD REQUEST, the client send a bad request
-- HTTP_RESPONSE 500 INTERNAL_SERVER_ERROR, when the server can deliver the request
do
handle_not_implemented ("Method POST not implemented", req, res)
end
execute_put (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
if req.is_chunked_input then
do_put (ctx, req, res)
else
if req.content_length_value > 0 then
do_put (ctx, req, res)
else
handle_bad_request_response ("Bad request, content_length empty", req, res)
end
end
end
do_put (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
handle_not_implemented ("Method PUT not implemented", req, res)
end
execute_delete (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
do_delete (ctx, req, res)
end
do_delete (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Here we use DELETE to logically delete a person.
-- 204 if is ok
-- 404 Resource not found
-- 500 if we have an internal server error
do
handle_not_implemented ("Method DELETE not implemented", req, res)
end
execute_head (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
do_head (ctx, req, res)
end
do_head (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Using HEAD to retrieve resource information.
-- If the HEAD request is SUCCESS, we response with
-- 200 OK, and WITHOUT a representation of the person
-- If the HEAD request is not SUCCESS, we response with
-- 404 Resource not found
-- If is a Condition HEAD and the resource does not change we send a
-- 304, Resource not modifed
do
handle_not_implemented ("Method HEAD not implemented", req, res)
end
execute_options (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
do_options (ctx, req, res)
end
do_options (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Using OPTIONS to retrieve resource information.
-- If the OPTIONS request is SUCCESS, we response with 200 OK
do
handle_not_implemented ("Method OPTIONS not implemented", req, res)
end
execute_extension_method (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
do_extension_method (ctx, req, res)
end
do_extension_method (ctx: C; req: WSF_REQUEST; res: WSF_RESPONSE)
do
handle_not_implemented ("Method extension-method not implemented", req, res)
end
handle_error (a_description: STRING; a_status_code: INTEGER; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Handle an error.
local
h: HTTP_HEADER
do
create h.make
h.put_content_type_application_json
h.put_content_length (a_description.count)
h.put_current_date
res.set_status_code (a_status_code)
res.put_header_text (h.string)
res.put_string (a_description)
end
handle_not_implemented (a_description: STRING; req: WSF_REQUEST; res: WSF_RESPONSE)
do
handle_error (a_description, {HTTP_STATUS_CODE}.not_implemented, req, res)
end
handle_bad_request_response (a_description: STRING; req: WSF_REQUEST; res: WSF_RESPONSE)
do
handle_error (a_description, {HTTP_STATUS_CODE}.bad_request, req, res)
end
handle_resource_not_found_response (a_description: STRING; req: WSF_REQUEST; res: WSF_RESPONSE)
do
handle_error (a_description, {HTTP_STATUS_CODE}.not_found, req, res)
end
handle_forbidden (a_description: STRING; req: WSF_REQUEST; res: WSF_RESPONSE)
-- Handle forbidden.
do
handle_error (a_description, {HTTP_STATUS_CODE}.forbidden, req, res)
end
note
copyright: "2011-2012, Jocelyn Fiat, Javier Velilla, 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