Resources and key authorization does not work

Hi!

There seems to be a problem when trying to use resources together with the key authentication module. There are a couple of reasons for this:

1. Resource controller parameters must be defined with a source declaration, while services does not. This is all well and good, until you want to use the key authentication module. The problem is how the server declares the parameters, for instance:

  $arg_sessid = array(
    'name' => 'sessid',
    'type' => 'string',
    'description' => t('A valid sessid.'),
  );

This will work for services, but when using it with a resource, a source must be provided, like this:

  $arg_sessid = array(
    'name' => 'sessid',
    'type' => 'string',
    'description' => t('A valid sessid.'),
    'source' => array('param' => 'sessid'),
  );

This part of the problem is quite easy to fix (just add the source).

2. When a resource controller is about to be executed, it calls the function services_method_call, which in turn sets the authentication system in motion. The authentication system needs to know the method name, since it saves it in the database and links it to the key that is required to use this controller. The REST server passes the controller declaration to the server. According to the docs, this is valid, since the first parameter, $method_name can either be an array or the name of the service to call. Services uses a mapper to map all controller names to methods, in order to be able to handle both services and resources the same way. However, there are, as far as I know, no way to do this with just a controller, and without knowing which resource it belongs to, and this is needed.

As I see it, there is no way to fix this in the 2.x version without doing some big refactoring changes. However, it must be solved in some way in order to get resources to work properly in 2.x.