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How do I debug what the native proxy provider is doing [message #1795915]

Tue, 02 October 2018 06:19

Eclipse User

Hello,

I use a Windows workstation behind a firewall and need to configure a proxy. The Internet Options rely on an configuration script (Use automatic configuration script) which has a URL that points to a PAC file.

In both Eclipse 4.8 and 4.9 the "Native" provider does not work. When I try to access update sites to install new software or update my installation, I get "HTTP Proxy Authentication Required"

If I set the provider to manual and enter the proxy address/port to the HTTP/HTTPS proxy entries, I am able to update and install new software even though I am never prompted for a password (Requires authentications is NOT checked when I set the proxy address/port).

Since the exceptions list is quite complex (which I currently manage with "proxy bypass" list) I would like to switch to the native provider.

Questions:

1) Is configuration via PAC supposed to work? Can eclipse invoke the Javascript to figure out what server to use for the page?

2) How can I enable debugging to see what Eclipse is doing (what the parameters to FindProxyForURL invocations are, what is returned, what errors occur).

[Updated on: Tue, 02 October 2018 06:52] by Moderator

Re: How do I debug what the native proxy provider is doing [message #1795925 is a reply to message #1795915]

Tue, 02 October 2018 09:32

Eclipse User

It has been ages since I looked at the proxy code, and I don't have any experience with the "Native" proxy which is Windows-only. I suspect you'll need to crack open the debugger and launch Eclipse within Eclipse with some strategically placed breakpoints. The classes you're interested in are:

org.eclipse.core.internal.net.ProxyManager, and specifically put a breakpoint on `select(URI)`
org.eclipse.core.net.ProxyProvider: this is the "Native" provider

Brian.

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