controller_id
Handle different content representations of a page.
Redirects to different representations of a page, depending on the requested content type. The redirect is done using a “303 See Other” status. A “404 Not Found” or “410 Gone” is returned if the requested page never existed or has been deleted.
When no content types are requested then text/html is selected.
This controller is also used for a page’s short url representation.
Example dispatch rule (from mod_base):
{id, ["id", id], controller_id, []}
This controller does not have any dispatch options.
This controller handles the following query argument:
| Option | Description | Example URL |
| id | Id of the requested resource. | /id/1234 |
The list of provided content types is collected with a foldr
notification (see Notifications) of the type
content_types_dispatch. Modules should add their provided content
types in front of the accumulator. The added entries are tuples:
{MimeType, DispatchRuleName}.
Example of adding a content type handler adding a text/plain handler
with the dispatch rule rsc_text:
observe_content_types_dispatch(#content_types_dispatch{}, Acc, _Context) ->
[{"text/plain", rsc_text} | Acc].