require 'open-uri'
require 'webrick/httpproxy'

#ProxyStruct = Struct.new(:host, :port, :userinfo)

def lookup_proxy(host)
	unless($proxy_last_update && $proxy_last_update == File.mtime("proxy_config.rb"))
		$proxy_last_update = File.mtime("proxy_config.rb")
		$proxy_proc = File.readlines("proxy_config.rb").join("\n")
	end if File.exist?("proxy_config.rb")
	proxy = eval($proxy_proc)
	return URI.parse(proxy) if proxy
end

class URI::Generic
	def find_proxy
		#~ proxy = lookup_proxy(host)
		#~ return URI.parse("http://#{proxy.host}:#{proxy.port}") if proxy
		lookup_proxy(host)
	end
end

class WEBrick::HTTPProxyServer
	def proxy_uri(req,res)
		lookup_proxy(req.host)
		#~ lookup_proxy(req.host)
	end
end