in reply to Learning HTTP headers

Nice stuff. =) But for those out there that already have Bundle::LWP installed should look for the GET/HEAD/POST scripts that it installs. A fine and sexy tool I use almost every day. Try these if you have it installed:
/usr/local/bin/GET -USed http://www.yahoo.com/ /usr/local/bin/GET -USed http://www.microsoft.com/ /usr/local/bin/GET -USed http://www.apple.com/

--
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