Re: Link checking (only)

gerrit (gerr.roots@t-online.de)
Tue, 13 May 97 05:16 +0100


Date: Tue, 13 May 97 05:16 +0100
From: gerr.roots@t-online.de (gerrit)
Subject: RE: Re: Link checking (only)
To: delabeau@iniki.gsfc.nasa.gov (Jeff de la Beaujardiere)
Cc: www-html@w3.org
Message-Id: <m0wR7yO-0005ClC@ermail03.btx.dtag.de>

Hi,
 my name is gerrit and I received this message from you I think my name is 
standing on any mailing-list!!!! Can you help me and tell me what I can do not to 
receive these letters anymore, I would be very thankful if you could describe me 
how I can Unsubscribe from the list where I Recwived for example your letter and 
even much other letters!!!!
this I received:
Walter Ian Kaye writes:
> Is there a standard way to check the existence of a URL resource without
> actually downloading it?

You can use the HEAD request instead of GET:

>telnet www.natural-innovations.com 80   #telnet to port 80
Trying 209.24.40.77...
Connected to www.natural-innovations.com.
Escape character is '^]'.
HEAD / HTTP/1.0                   #syntax is "Method Request-URI HTTP-Version"
                                  #extra newline to signal end of request
HTTP/1.0 200 OK                   #response from server starts here
Date: Mon, 12 May 1997 20:33:17 GMT
Server: BESTWWWD/1.0
MIME-version: 1.0
Content-type: text/html

Connection closed by foreign host.

> Hmm, that brings up another question: How does one find out what
> commands are supported by different web servers?

The HTTP 1.0 request methods are GET, POST, and HEAD (see
http://www.w3.org/pub/WWW/Protocols/rfc1945/rfc1945).  HTTP 1.1 defines
OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE (see
http://www.w3.org/pub/WWW/Protocols/rfc2068/rfc2068).

--Jeff

  = J-F Pitot de La Beaujardiere
  = delabeau@iniki.gsfc.nasa.gov
  = http://globe2.gsfc.nasa.gov/