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License: Perl Artistic License
Price: FREE
Publisher: Brad Fitzpatrick

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LWPx::ParanoidAgent Description

LWPx::ParanoidAgent is a Perl subclass of LWP::UserAgent that protects you from harm.
LWPx::ParanoidAgent is a Perl subclass of LWP::UserAgent that protects you from harm.SYNOPSIS require LWPx::ParanoidAgent; my $ua = LWPx::ParanoidAgent->new; # this is 10 seconds overall, from start to finish. not just between # socket reads. and it includes all redirects. so attackers telling # you to download from a malicious tarpit webserver can only stall # you for $n seconds $ua->timeout(10); # setup extra block lists, in addition to the always-enforced blocking # of private IP addresses, loopbacks, and multicast addresses $ua->blocked_hosts( "", qr/$/i, sub { my $host = shift; return 1 if is_bad($host); }, ); $ua->whitelisted_hosts( "brad.lj", qr/^, sub { ... }, ); # get/set the DNS resolver object that's used my $resolver = $ua->resolver; $ua->resolver(Net::DNS::Resolver->new(...)); # and then just like a normal LWP::UserAgent, because it is one. my $response = $ua->get(''); ... if ($response->is_success) { print $response->content; # or whatever } else { die $response->status_line; }The LWPx::ParanoidAgent is a class subclassing LWP::UserAgent, but paranoid against attackers. It's to be used when you're fetching a remote resource on behalf of a possibly malicious user.This class can do whatever LWP::UserAgent can (callbacks, uploads from files, etc), except proxy support is explicitly removed, because in that case you should do your paranoia at your proxy.Also, the schemes are limited to http and https, which are mapped to LWPx::Protocol::http_paranoid and LWPx::Protocol::https_paranoid, respectively, which are forked versions of the same ones without the "_paranoid". Subclassing them didn't look possible, as they were essentially just one huge function.This class protects you from connecting to internal IP ranges (unless you whitelist them), hostnames/IPs that you blacklist, remote webserver tarpitting your process (the timeout parameter is changed to be a global timeout over the entire process), and all combinations of redirects and DNS tricks to otherwise tarpit and/or connect to internal resources. Requirements:
· Perl

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