Thank you, I know how to get anything using external sniffer or proxy server (that's how I got real headers I posted in my question). My problem is - how to get them using LWP itself, not using any external program, including sniffers, proxy etc.

Hmm, have you ever looked inside of LWP?

Since LWP doesn't give you that, the only way you do it by editing the many modules that comprise LWP :)

I prefer simple solutions, speaking of which, you could start a socket server, then hijack/redirect connections with EXTRA_SOCK_OPTS... but you probably thought of that and don't like it for some reason (i don't like to write that much code :)

OTOH, I just looked and saw LWP::Protocol::nogo / LWP::Protocol::PSGI - Override LWP's HTTP/HTTPS backend with your own PSGI applciation

I think this is as close as you can get :)

I prefer simple solutions, speaking of which, you could start a socket server, then hijack/redirect connections with EXTRA_SOCK_OPTS... but you probably thought of that and don't like it for some reason (i don't like to write that much code :)

I'm using not only HTTP there, but also SSL/TLS, so...

OTOH, I just looked and saw LWP::Protocol::nogo / LWP::Protocol::PSGI 
+- Override LWP's HTTP/HTTPS backend with your own PSGI applciation

I think this is as close as you can get :)
[download]

Thank you, I'll check them out :)