On Apr 26, 2004, at 10:13 AM, [EMAIL PROTECTED] wrote:


Subject: determining 404
To: How to use Revolution <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii; format=flowed

When obtaining a web resource, if it's 404 the server will usually
return a page noting that for the user.  That's all well and good, but
the 404 pages I've seen appear to be designed for human reading, and do
not appear to have any consistent elements which would allow a machine
to identify that the resource was not found.

Is there something in the header that identifies that?

How can I know when a requested URL doesn't exist?

--
  Richard Gaskin
  Fourth World Media Corporation


You look at the first response header, it should look like


HTTP/1.1 200 OK

and if there's a 404 it will be

HTTP/1.1 404 File Not Found

You look for the status code, not the status string.

You can see this using the form at http://www.delorie.com/web/headers.html

-- Frank


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