[cups.general] http://localhost:631 displays raw html

[John Blinka]

Hi,

I've got 5 machines running Gentoo linux and all running cups.  On four 
of the
machines, cups works perfectly.  On one it doesn't work at all.  On that 
machine
I can't configure cups via http://localhost:631 because, instead of 
displaying the
cups admin web page, the browser displays only the raw html.

Here's what I know about the problem so far:

1)  cupsd is running and listening to port 631.  neither restarting 
cupsd nor
     rebooting solves the problem.
2)  cupsd is returning the contents of the file 
/usr/share/cups/docs/index.html
     to the web browser.  The contents and permissions on that file are
     identical to the contents and permissions on my machines where cups
     behaves correctly.
3)  The display of raw html occurs on both firefox and konqueror, so it's
     not a browser specific problem.
4)  Both firefox and konqeror display all other web pages correctly.  Both
     display the contents of /usr/share/cups/docs/index.html correctly if I
     access it as file:///usr/share/cups/docs/index.html.
5)  The cups logs on the affected and unaffected machines are slightly
      different.  Neither machine reports anything in the error logs when I
      attempt to access http://localhost:631.  On the affected machine (the
      one on which cups does not work) the access_log contains

      localhost - - [26/Feb/2006:07:03:24 -0500] "GET / HTTP/1.1" 200 1604
      localhost - - [26/Feb/2006:07:03:24 -0500] "GET /favicon.ico 
HTTP/1.1" 404 0

      An unaffected machine contains a little more:

      localhost - - [26/Feb/2006:06:59:49 -0500] "GET / HTTP/1.1" 200 1604
      localhost - - [26/Feb/2006:06:59:49 -0500] "GET /cups.css 
HTTP/1.1" 200 87
      localhost - - [26/Feb/2006:06:59:50 -0500] "GET /images/navbar.gif 
HTTP/1.1" 200 2869
      localhost - - [26/Feb/2006:06:59:50 -0500] "GET /favicon.ico 
HTTP/1.1" 404 0

      In addition, the affected machine's error logs contain lines like:

      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "classified" is 
of an unknown file type - skipping!
      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "confidential" is 
of an unknown file type - skipping!
      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "secret" is of an 
unknown file type - skipping!
      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "standard" is of 
an unknown file type - skipping!
      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "topsecret" is of 
an unknown file type - skipping!
      W [25/Feb/2006:19:03:46 -0500] AddBanner: Banner "unclassified" is 
of an unknown file type - skipping!
      W [25/Feb/2006:19:04:58 -0500] AddBanner: Banner "classified" is 
of an unknown file type - skipping!

       I don't know where those are coming from.  They don't appear in 
the unaffected machine.

6)  I compared the output of wget -S http://localhost:631 on affected 
and unaffected machines.
     There's one significant difference.  On the affected machine, wget 
reports
                   Content-Type: text/plain; charset=utf-8
     and on the unaffected machine wget reports
                   Content-Type: text/html; charset=utf-8
     So, the browser displays raw html because that's what cupsd tells 
it to display.  But why?

Thanks in advance for any help!

John Blinka