From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-02-07T21:09:03+09:00
Subject: Assessment on resource leakage


Below is the result of a 10 minutes hack to create a simple HTTP-connect
tunnel. I'm not closing sockets since I assume that at some point one end
will close its connection and the thread will die with some exception
such as Errno::EPIPE, Errno::EHOSTUNREACH or EOFError, so that the
sockets are GC'ed (and closed) some time in the future.

Is this assumption correct?


require 'socket'

port = (ARGV[0] || 6666).to_i
server = TCPServer.new('localhost', port)
puts "Binding to #{port}"
while ( session = server.accept )
  Thread.new(session) do |s|
    line = s.readline("\r\n")
    break unless line =~ /CONNECT\s+(.+):([0-9]+)\s+HTTP\/1.(?:0|1).*/
    _host, _port = $1, $2
    while line != "\r\n"
      line = s.readline("\r\n")
    end
    out = nil
    begin
      out = TCPSocket.new( _host, _port.to_i )
    rescue
      s.print "HTTP/1.0 500 Connection could not be established\r\n\r\n"
      break
    end
    s.print "HTTP/1.0 200 Connection established\r\n\r\n"
    loop do
      ready = select [s, out]
      ready = ready[0]
      ready.each do |x|
        case x
        when s
          data = s.sysread(512)
          out.syswrite data
        when out
          data = out.sysread(512)
          s.syswrite data
        end
      end
    end
  end
end

-- 
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