Performing reverse proxy re-directs and re-writes depending on case of url

Question

Hi,
I have a front-end v6.1 SP6 web server running on Windows that hosts a public facing web site as well as re-directs specific folder urls to back-end applications hosted on Linux based application servers.
I need to perform proxy re-directs and / or url re-writes depending on the case-sensitivity of the url requested from the Windows hosted web server.
i.e. There is a back-end application with the internal url http://abc.internal.com/ABC, which importantly will not serve pages from http://abc.internal.com/abc
So what I need is:
www.external.com/ABC  -- proxy redirect -->  abc.internal.com/ABCwhereas
www.exernal.com/abc  -- rewrite -->  www.external.com/ABC  -- proxy redirect -->  abc.internal.com/ABCWhat I have so far will provide the reverse proxy re-write for /ABC:
<Object name="default">
NameTrans fn="assign-name" from="/ABC(|/*)" name="abc.internal.com"
</Object>
<Object name="abc.internal.com" 2=">">
ObjectType fn="force-type" type="magnus-internal/passthrough"
Service fn="service-passthrough" servers="http://191.168.1.10:80"
</Object>However, this will also reverse proxy requests for /abc which will return an error from the internal app server. So, is it possible to perform a case-sensitive dependent re-write / redirection on v6.1 on Windows?
N.b. I realise that the back-end application could be modified to handle both upper and lower case requests but that is not an option here.
Thanks for your help.

Answer 1

I can't think of an easy way to do what you want. On Windows, Web Server treats URIs and paths as case insensitive, so there's no obvious way to treat /ABC differently than /abc.
I do see a few options. Unfortunately, they're all relatively complicated:
a) Write an NSAPI plugin
b) Write a Servlet filter
c) Use Sun Java System Web Server 7.0
If you switch to 7.0, you can use case-sensitive regular expressions:<If $uri =~ '^/ABC/?'>
NameTrans fn="assign-name" name="abc.internal.com"
</If>