From: Jon Fi <exabrial@...>
Date: 2006-10-02T23:46:40+09:00
Subject: Monitoring Socket Disconnect during gets or readline

Hello... I am writing a simple chat program, but i have encountered a 
problem. I ask for a client to provide a handle, but it he disconnects 
during a gets call, it does weird things.

[code]
  def get_handle(session)
    for attempt in (0..2)
      session.print "Please Login\n"

      response=session.gets.strip  # The problem

      re=/(Login)\s(.+)/
      md=re.match(response)
      response=md[2]
      if(!@socketHash.has_value?(response))  # This just checks to make 
sure the handle isn't in use.
        return response
      else
        session.print "Handle alerady in use... "
      end
    end
  end
[/code]

If the client disconnects at this point, ruby seems to be still waiting 
for a response. Also, sometimes it sends ruby's processor usage to 100%.

Is there a better way to do this? Or is there a way to give gets a 
timeout? Thanks!
-Jon

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