Nginx.rb Youtube Caching

#!/usr/bin/env ruby
# This script is not written by me,
# My Email address is inserted Just for tracking purposes
# For more info, visit http://code.google.com/p/youtube-cache/
# url_rewrite_program <path>/nginx.rb
# url_rewrite_host_header off

require "syslog"
require "base64"

class SquidRequest
attr_accessor :url, :user
attr_reader :client_ip, :method

def method=(s)
@method = s.downcase
end

def client_ip=(s)
@client_ip = s.split('/').first
end
end

def read_requests
# URL <SP> client_ip "/" fqdn <SP> user <SP> method [<SP> kvpairs]<NL>
STDIN.each_line do |ln|
r = SquidRequest.new
r.url, r.client_ip, r.user, r.method, *dummy = ln.rstrip.split(' ')
(STDOUT << "#{yield r}\n").flush
end
end

def log(msg)
Syslog.log(Syslog::LOG_ERR, "%s", msg)
end

def main
Syslog.open('nginx.rb', Syslog::LOG_PID)
log("Started")

read_requests do |r|
if r.method == 'get' && r.url !~ /[?&]begin=/ && r.url =~ %r{\Ahttp://[^/]+\.youtube\.com/(videoplayback\?.*)\z}
log("YouTube Video [#{r.url}].")
"http://127.0.0.1:8081/#{$1}"
else
r.url
end
end
end
main