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Is there a way to reverse proxy only certain file types?

I am trying to do the following:

VirtualHost {
  Hostname = chat.ulyaoth.net
  WebsiteRoot = /srv/ulyaoth/public
  AccessLogfile = /var/log/hiawatha/ulyaoth-access.log
  ErrorLogfile = /var/log/hiawatha/ulyaoth-error.log
  StartFile = chat.pl
  ExecuteCGI = yes
  RequireTLS = yes,31104000
  RandomHeader = 512
  ReverseProxy ^/register http://127.0.0.1:3000
  ReverseProxy ^/login http://127.0.0.1:3000
  ReverseProxy ^/lostpassword http://127.0.0.1:3000
  ReverseProxy .pl http://127.0.0.1:3000
}

The one i cannot get to work is:

ReverseProxy .pl http://127.0.0.1:3000

I basically want all files with the extension .pl do the reverse proxy but anything else should be done by Hiawatha as usual.

is this possible?

I have to add that the .pl files do not exist in the hiawatha public folder.

So basically I need all requests towards "chat.pl" to go to http://127.0.0.1:3000.

Try ReverseProxy .*\.pl http://127.0.0.1:3000

seems not to work also I think problem is actually on the backend part.

I run a perl program that is build in Mojolicious http://mojolicious.org

[root@chat ~]# curl -I http://127.0.0.1:3000
HTTP/1.1 200 OK
Server: Mojolicious (Perl)

So I guess the problem is that the first request "chat.pl" can't actually be sent to the backend because "http://127.0.0.1:3000/chat.pl" does not work.
it works all fine if I reverse proxy / to the app but due to some legacy I have to run some old .cgi scripts also by Hiawatha.

So to think of it I guess what I really need is the other way around all traffic except ".cgi" files should go to the reverse proxy.
so Hiawatha should handle the cgi files, is such a thing even possible?

or alternative I could run the perl script directly in Hiawatha without the mojolicious servers if I can fix the urls somehow, if i run it in Hiawatha it does this when I click a link: http://127.0.0.1/chat.pl/login but it should do http://127.0.0.1/login (but it has to be run by chat.pl).

Do you have any idea perhaps for one of the two?

Try the following rule to proxy everything but .cgi:

ReverseProxy !\.cgi http://127.0.0.1:3000/chat.pl

To run it via Hiawatha, use this:

CGIhandler = /usr/bin/perl:pl

VirtualHost {
  ...
  EnablePathInfo = yes
  ExecuteCGI = yes
  UseToolkit = mojolicious
}

UrlToolkit {
  ToolkitID = mojolicious
  RequestURI exists Return
  Match ^(/.*) Rewrite /chat.pl$1
}

Both options work! thank you so much

I will stick with the second one seems to me no point to run another webserver if Hiawatha can handle it with a toolkit.