psandeepunni / cowboy-automatic-route-dispatcher Goto Github PK

Write up modules that runs on all requests before/after the right controller is called. Sort of like a global pre/post hook.

The default or landing page (a.k.a domain root) is currently not possible to implement. By convention, an <application_name>_index.erl should respond to calls made to ' / '.

When there are some custom headers (like session-id) set in request, CORS policies does not allow access (on client side). The solution is to add cowboy_req:set_resp_header(<<"access-control-allow-headers">>, <<"*">>, ...) alongside <<"access-control-allow-origin">>
in files cards_dealer.erl and cards_root_handler.erl

Provide configuration options for CARDS via environment variables. This incorporates future configurable modules such as a riak client.

We'll need to facilitate hooks for controllers (init/terminate alternatives) which are also to follow the naming convention style. Can be done in two ways: one is to have a hooks folder, with filenames corresponding to controllers and methods to actions. Another is to have *_controller.erl replaced by *_hooks.erl and actions as methods.

Differentiation of POST and PRE execution hooks should reside on the method naming. For an action "act_one" the POST and PRE execution hooks may look like: pre_act_one() -> and post_act_one() ->

Should have an additional parameter or way of transferring session data (viz. user login status).
Must be written in such a way that CARDS_DEALER provides a unified API for authentication with a database of choice. A session-id or an API-Token is validated, either against a stored session or passed to a user written module that decides the authentication method itself. Default(configuration free) session-id/API-Token based approach requires our own implementation of a micro OAuth protocol and a database for storage.

If using erlang.mk
Use
dep_cards = git https://github.com/psandeepunni/cowboy-automatic-route-dispatcher.git master
Instead of
dep_cards = https://github.com/psandeepunni/cowboy-automatic-route-dispatcher.git master

Websockets are not routed at the moment. Need to implement it.

Proposed scheme:

/handle/extension[/extras]
Relates to handle_socket:extension_init(), handle_socket:extension_info(), handle_socket:extension_receive(), handle_socket:extension_terminate() where init, info and terminate are optional.

NOTE: /handle/extension would respond to HTTP(S) via handle_controller:extension()

CowboyAutomaticRouteDispatcherService -> CARDS

By documentation, cards should have a fallback for absent policies. This fails in the current build and need to be addressed asap.