mod_proxy_http and input filters

[Lawrence S K Ong <lawrence.s.k.ong@xxxxxxxxx>]

Can someone please help me with this issue?

I have recently created an input filter.  This input filter was created to modify the POST uri on the condition that the body matches a certain string.  After the uri is modified, mod_proxy_http would send the correct POST uri to the backend server.  Yes, this worked and the correct uri is sent to the backend server.  However, when there are two ProxyPass configuration, there is an issue.

For example:

ProxyPass /altlocation http://serverA/altlocation
ProxyPass / http://defaultServer/

The input filter converts the original URI to /altlocation if the body matches a certain condition.

The issue is that I always hit http://defaultServer/ rather than http://serverA/altlocation.  It seems that this issue is occuring because the determination of which server to proxy to is performed after the header is sent, and not after the body arrives.

Does anyone know how I can avoid this?

Thanks,
Lawrence