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RE: HTTP HEAD requests for Last-Modified info

From: Dave Cole <dcole@netcarta.com>
Date: Tue, 18 Jun 1996 22:56:33 -0700
Message-Id: <01BB5D69.65DDBB00@apogee.netcarta.com>
To: "'Stephen Zagerman'" <steve@wco.com>, "www-talk@w3.org" <www-talk@w3.org>
Returning of Last-Modified is server dependent. There is nothing that I 
know of in the protocol that will force a server to return the 
Last-Modified. I have noticed that several servers don't always return this 


From: 	Stephen Zagerman[SMTP:steve@wco.com]
Sent: 	Tuesday, June 18, 1996 8:53 PM
To: 	www-talk@w3.org
Subject: 	HTTP HEAD requests for Last-Modified info

Awhile ago, I posted a question re: HTTP requests to obtain Last-Modified
info for web pages. I got answers that indicated the way to get header info
for a theoretical "www.site.com/page.html" would be to open a connection to
www.site.com and issue the following request:

HEAD /page.html HTTP/1.0 <CRLF><CRLF>

This is good in that it does elicit a set of info, but it's bad in that it
does not ALWAYS return Last-Modified info... which is what I really need.

Does anyone know if there is something additional I need to add to the
request to ALWAYS get the Last-Modified info? I've read the spec, but am
not clear on what I need to do.


Stephen Zagerman
Received on Wednesday, 19 June 1996 01:59:01 UTC

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