A while back I tripped over a case where ActionController flakes when
handed a dotted-quad hostname behaves oddly; it (properly) asserts
that the domain name is nil, but happily tells you the subdomains are
the first two quads. Like so:
@request = ActionController::TestRequest.new
=> #<ActionController::TestRequest:0x38a2868 ...>
@request.host = '192.168.1.1'
=> ["192", "168"]
When patched, @request.subdomains returns an empty array.
Ticket and patch (with tests): http://dev.rubyonrails.org/ticket/9479
Could I beg a quick review and, if worthy, a few +1s to get this into