From reading ProxyPass's doc, You should do something like that :
ProxyPass /dir1/ !
ProxyPass /dir2/ !
ProxyPass / http://127.0.0.1:8080/
ProxyPassReverse / http://127.0.0.1:8080/
Support for proxy autoconfiguration on Windows seems so "seamless" because it's implemented by the WinHTTP client, which is stored in a DLL accessible to all applications with a public API. Many applications use WinHTTP and get proxy-autoconfiguration "for free".
In the Linux world, each application is typically making its own socket calls and using its own implementation of the HTTP protocol. There are HTTP libraries out there, but it's much more likely, as compared to Windows, that applications are going to handle doing HTTP on their own and probably won't have a Javascript interpreter necessary to process a proxy autoconfiguration file.
You might consider running a local proxy server on the Linux machine, specifying itself as the HTTP_PROXY system-wide, and then configuring that local proxy server with the necessary rules to access some sites directly versus using the corporate proxy as a parent.
Squid could do what you want, but it's fairly heavyweight. I just found this interesting tinyproxy project, and it certainly looks promising (allows for selective use of an upstream proxy by domain, very lightweight, etc), but I've never used it personally and know nothing about it. (In theory, one could modify tinyproxy to actually parse the proxy autoconfiguration file. That'd be a really neat trick, though not something I have time to work on...)
Best Answer
Word of caution:
The solution below can be a major security issue because you allow the end user to specify a port to hit on the backend server, hence opening the door to allowing access to ports that shouldn't be visible on the outside.
Some mechanism would have to be in place to prevent unwanted ports - this could also be done in a similar fashion with
mod_rewriteto let through anything you want and block what you don't want.This could be done using Apache httpd
mod_rewriteand proxy, the directive would be:You will need to enable
mod_rewriteandmod_proxy. For full documentation onmod_rewrite, you can consult:pflag.That said, it would probably be better to actually set it up with ProxyPassMatch...