Tried setting java proxy; Fiddler still not capturing traffic

[Sam]

Hi - running Fiddler Web Debugger (v4.6.2.0) on W7 64

1) Running a java app (q.jar, attached)

2) I set proxy in Java control panel:

Control Panel>Java>General>Network Settings:
Use Proxy Server:
Address: 127.0.0.1 (or localhost)
Port: 8888

3) I launch q.jar (double-click in Windows Explorer) which gives me a java warning message that the app cannot connect to the web server.  This is normal (the web server was taken down a few years ago), so I am trying to use fiddler to redirect to my local server.

But I cannot get fiddler to capture the q.app traffic to get the needed config info for redirection.

Could anyone please help me?

Thanks -

Sam

[Tsviatko Yovtchev]

Hello,

Please, first make sure that Fiddler is running on port 8888 (this could be changed in Fiddler settings).

Then check out what library is q.jar using to handle http traffic. The way you set up the proxy server works only for the standard Java libraries. Custom libraries might have different ways to set up the proxy.

Regards,
Tsviatko Yovtchev
Telerik

[Sam]

Thanks very much for you reply.

 >>  make sure that Fiddler is running on port 8888

I assume that means Tools>Fiddler Options>Connections>Fiddler listens on port: 8888

>> check out what library is q.jar using to handle http traffic

I wish I knew how to do this... can anyone point me in the right direction?

I extracted the q.jar file and did a search for "http" and these lines seemed relevant, but I'm ignorant about java and about "http libraries":

QoraanServlets.java:

import javax.servlet.http.*;
...
public class QoraanServlets extends HttpServlet  {
...
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{