Net::HTTP transfer limit


I’ve done some searching through the archives, but so far I haven’t
found an
answer to this question.

I have an application that allows users to request arbitrary URLs. The
underlying mechanism uses Net::HTTP.get() to fetch the object at the URL
attempts to parse it as an XML document.

That all works fine, but it leaves open a fairly trivial DoS attack – a
user can create a CGI that spews back content continuously, for example.
lessen this potential, I would really like to specify a byte limit for
GET, i.e., “Stop reading and close the socket if you have read more than
1MB”. HTTP ‘Range’ doesn’t seem like an option, because there’s no
reason to
expect a malicious server to respect it in the request.

Does anyone have any ideas, or pointers?