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asp_web_howto thread: RE: Header records
Message #1 by Sam Clohesy <sam@e...> on Fri, 26 Oct 2001 12:47:58 +0100
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Hi all.
Is there a way to discern header records using ASP? (Whether site uses them
and what they are?)
Maybe a servervariable ?
(I can't seem to find one?)
Thanks guys
Sam
Message #2 by "Ken Schaefer" <ken@a...> on Sat, 27 Oct 2001 20:01:30 +1000
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From: "Sam Clohesy" <sam@e...>
Subject: [asp_web_howto] RE: Header records
: Is there a way to discern header records using ASP? (Whether
: site uses them and what they are?)
: Maybe a servervariable ?
: (I can't seem to find one?)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
What are "header records"?!?
Do you mean HTTP Headers?
<%
For Each Key in Request.ServerVariables
Response.Write(Key & " = " & Request.ServerVariables(Key) & "<br>" &
vbCrLf)
Next
%>
That tells you want the client sent to *your site*.
If you mean, "Does XYZ company's site use HTTP Host Headers?", then that's
easy. Do a reverse DNS lookup on the IP address, that'll tell you the A Name
record for that IP. If the DNS name is different then they must have a CNAME
alias, in which case they must be using host headers.
http://www.cis.ohio-state.edu/cgi-bin/rfc/rfc1034.html
DNS Names and Concepts
Cheers
Ken
Message #3 by Sam Clohesy <sam@e...> on Mon, 29 Oct 2001 08:59:33 -0000
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Thanks Ken, thats really useful.
What I am trying to ascertain is whether a site uses header records in IIS.
(Like mysite.com. mysite.net etc) and what these headers are.
This stuff is really useful
Thanks
Sam
-----Original Message-----
From: Ken Schaefer [mailto:ken@a...]
Sent: 27 October 2001 11:02
To: ASP Web HowTo
Subject: [asp_web_howto] RE: Header records
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From: "Sam Clohesy" <sam@e...>
Subject: [asp_web_howto] RE: Header records
: Is there a way to discern header records using ASP? (Whether
: site uses them and what they are?)
: Maybe a servervariable ?
: (I can't seem to find one?)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
What are "header records"?!?
Do you mean HTTP Headers?
<%
For Each Key in Request.ServerVariables
Response.Write(Key & " = " & Request.ServerVariables(Key) & "<br>" &
vbCrLf)
Next
%>
That tells you want the client sent to *your site*.
If you mean, "Does XYZ company's site use HTTP Host Headers?", then that's
easy. Do a reverse DNS lookup on the IP address, that'll tell you the A Name
record for that IP. If the DNS name is different then they must have a CNAME
alias, in which case they must be using host headers.
http://www.cis.ohio-state.edu/cgi-bin/rfc/rfc1034.html
DNS Names and Concepts
Cheers
Ken
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