As the documentation for LWP says, the best place to discuss exact details for complex stuff is libwww@perl.org. However browsing the documentation and code it looks like there is an assumption built into the code that all requests will be mediated through only one level of proxy, and which proxy to use will be a function of the communication scheme used. (In other words it assumes a configuration which matches any browser you have ever seen.)

But if use the full interface, your LWP::UserAgent object has methods named send_request(), simple_request() and just request() which send off requests with various levels of preparation and munging first. But the important thing is that they can be anything that you want.

So I would suggest playing with using no proxy, and then start sending your own CONNECT requests, and see whether you can get it to send the correct sequence to chain levels of proxying.

PS I have only seen multiple levels of proxying used by people who were attempting to use various open proxies to anonymize themselves. Having looked at the traffic that passed through one such proxy, the users paid attention to how much the server reported to others, and didn't seem to realize that the server they are proxying off of can keep logs including the information not passed on, and do things like hand it over to law enforcement... (Yes, I do know of at least one case where law enforcement took full advantage of this.)

In reply to Re: Re: •Re: Chaining proxies with LWP::UserAgent by tilly
in thread Chaining proxies with LWP::UserAgent by Anonymous Monk

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