TUX_ACTION_GET_OBJECT and TUX_ACTION_READ_OBJECT

Hello,

I need to do some bit of MIME work in a tux module (for handling images
without a file extention) and I want to do this as fast as possible.

The easy way I see to do it is to reserve a healthy amount of space for
req->object_addr (all of the files have a max size, in this case) and then
run TUX_ACTION_READ_OBJECT, use the buffer to do the MIME work and finish
the steps.

How much slower is this than just using TUX_ACTION_GET_OBJECT, if at all?
Is it possible at all to check the read object and tell tux which mime
type to use?
I'm also not too sure about TUX_ACTION_READ_OBJECT, and how it behaves if
I accidentally give it a buffer too small for the object.

thanks,
-Alan