Be very, very, careful when considering querying all entries in a table.  The request will not return until it's finished building a list of all hosts which eats up memory in wsgi process and blocks until complete for that request handler.

Part of the reason GET wasn't implemented was because at the time I weren't sure it was worth the resource risk.  But I think there is a way to have this work without risking the resources using pagination.  It's not something I've implemented anywhere yet, but this was the example I was looking it using as a basis for my own: http://flask.pocoo.org/snippets/44/