[users@httpd] Preserve protocol in httpd proxy

[Juan Ignacio Barisich]

I need to configure in Apache 2.4.9 (with mod_proxy and mod_proxy_wstunnel
activated) a proxy with this mapping:

- http://my.proxy/*  -->  http://my.backend:8080/*
- ws://my.proxy/*    -->  ws://my.backend:8080/*

E.g.:

- ws://my.proxy/cometd-demo-2.8.0/cometd -->
ws://my.backend:8080/cometd-demo-2.8.0/cometd
- http://my.proxy/cometd-demo-2.8.0/cometd -->
http://my.backend:8080/cometd-demo-2.8.0/cometd
- http://my.proxy/cometd-demo-2.8.0/jquery-examples/chat/ -->
http://my.backend:8080/cometd-demo-2.8.0/jquery-examples/chat/

In other words, I need a proxy that keeps (preserves) the protocol.

This configuration does not work:

    <VirtualHost *:80>
       ...
       ProxyRequests Off
       ProxyPreserveHost Off
       ProxyPass / http://my.backend:8080/
       ProxyPassReverse / http://my.backend:8080/
    </VirtualHost>
because all request (no matter protocol) are proxied to http*

Anyone knows how can I solve this?

Thanks!