W3C home > Mailing lists > Public > ietf-http-wg-old@w3.org > January to April 1997

Re: Claification requested in Host:

From: <touch@isi.edu>
Date: Fri, 14 Feb 1997 14:00:59 -0800
Message-Id: <199702142200.AA29405@ash.isi.edu>
To: http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com, jg@zorch.w3.org

> Here is a HTTP 1.1 question for you.  According to the spec 14.23, the
> Host field is defined as
> 	"Host" ":" host [ ":" port ]
> where (in 3.2.2), host is defined as
> 	<a legal Internet host domain name or IP address...>
> 
> The question is whether a single component name consititute a "legal"
> Internet host domain name?  For example, a user types in "foo" at his

HTTP 1.1 refs RFC1123 on this, of which section 6.1.4.3, on abbreviation,
is relevant.

The RFC1123 indicates abrreviation (supporting it at the user interface)
as "MAY", not MUST or SHOULD.

> The question is whether a single component name consititute a "legal"
> Internet host domain name?  For example, a user types in "foo" at his
> browser, which runs in domain "xyz.com".  The browser is smart enough
> to assume the use wants to talk to "foo.xyz.com", and hence gets the
> correct IP address.  But in the HTTP request, the browser sends

The way I read the spec, it appears that

	browser aaa.browser.com
	requests	foo

	if the browser does the lookup to IP addr, it would ask for
		foo.browser.com
	i.e., foo in the current context

	if the browser redirects, it doesn't lookup, which means
		http://foo/...
	get sent to a proxy at:

	proxy ppp.proxy.com

	the server would do the resolution, i.e., testing for
		foo.proxy.com

So the answer depends on whether the browser is proxied or not,
which seems a little odd and certainly unpredictable.

As a result, I would assume that the browser would have to 
extend the name itself, asking for
		http://foo.browser.com/...

Joe
----------------------------------------------------------------------
Joe Touch - touch@isi.edu		    http://www.isi.edu/~touch/
ISI / Project Leader, ATOMIC-2, LSAM       http://www.isi.edu/atomic2/
USC / Research Assistant Prof.                http://www.isi.edu/lsam/
Received on Friday, 14 February 1997 14:08:15 EST

This archive was generated by hypermail pre-2.1.9 : Wednesday, 24 September 2003 06:32:26 EDT