Dispatch fallback

[Marc Worrell]

Hi,

TL;DR;

When (in 0.9dev) you add a template like:

/templates/static/hello.tpl

Then the request:

http://example.com/hello

will serve that template.

Without adding any dispatch rules.

Long version:

I just added a new notification to the 0.9dev.

It is called #dispatch{} and is used by the site dispatcher to find a matching dispatch rule when no rule matched.

The #dispatch{} observer can return:

- {ok, integer()} where the integer is a rsc id

- {ok, #dispatch_match{}}  with a webmachine resource and options filled in

- {ok, #dispatch_redirect{}} to redirect to a location (must be a fully qualified url!)

- undefined

With an 'undefined' other modules will be checked and finally a 404 might be served.

In mod_base I added a handler for the #dispatch{} notification:

%% @doc Check if there is a resource or template matching the path.

observe_dispatch(#dispatch{path=Path}, Context) ->

    case m_rsc:page_path_to_id(Path, Context) of

        {ok, Id} ->

            {ok, Id};

        {error, _} ->

            Template = "static/"++Path++".tpl",

            case z_module_indexer:find(template, Template, Context) of

                {ok, _} ->

                    {ok, #dispatch_match{

                        mod=resource_template,

                        mod_opts=[{template, Template}, {ssl, any}],

                        bindings=[{path, Path}, {is_static, true}]

                    }};

                {error, _} ->

                    undefined

            end

    end.

This does two things:

1. Check if there is resource with a set page path, if so return it's id

2. Check if there is a template in a 'static/' directory with the name of the request path.

    If so then this template is served using the resource_template module

- Marc

[Dmitrii Dimandt]

One word: AWESOME!

[M-MZ]

Very cool. love it. That also allows other modules to observe dispatch requests... Endless possibilities.

Maas