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Re: How to add new "protocols" ?

From: Ben Laurie <ben@gonzo.ben.algroup.co.uk>
Date: Tue, 18 Feb 1997 19:21:32 +0000 (GMT)
To: Ross Patterson <Ross_Patterson@ns.reston.vmd.sterling.com>
Cc: http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
Message-Id: <9702181921.aa00247@gonzo.ben.algroup.co.uk>
X-Mailing-List: <http-wg@cuckoo.hpl.hp.com> archive/latest/2433
Ross Patterson wrote:
> Ben Laurie <ben@gonzo.ben.algroup.co.uk> writes:
> >I was about to point this out. But it goes further. The point of a URL is that
> >it provides _complete_ information on how to retrieve the specified resource.
> >TCP is therefore mandated by http: in order to make the information complete
> >(we then know that we resolve the hostname with DNS and connect with TCP).
> Actually, TCP and port 80 are mandated by the fact that you've searched
> the DNS for an IP address that matched the specified name.  People tend
> to forget that the DNS can and does support more than just IP.  If you'd
> searched using a different record class (e.g.  CHAOS), you'd need to use
> the appropriate native stream-transport protocol.  It is perfectly
> reasonable for a given name to have both IP and non-IP data in the DNS,
> and which you ask for would depend on which you wanted.

I hadn't forgotten this. But if http: didn't mandate TCP and I found an IP
address and a CHAOS one for the same host, how would I access it? Not defined.

I may find an MX record for the host, but does this mean I can do HTTP over



Ben Laurie                Phone: +44 (181) 994 6435  Email: ben@algroup.co.uk
Freelance Consultant and  Fax:   +44 (181) 994 6472
Technical Director        URL: http://www.algroup.co.uk/Apache-SSL
A.L. Digital Ltd,         Apache Group member (http://www.apache.org)
London, England.          Apache-SSL author
Received on Tuesday, 18 February 1997 14:11:01 UTC

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