From: Brian Candler <b.candler@...>
Date: 2012-01-02T02:29:28+09:00
Subject: Re: gserver io.peeraddr and io.addr not working

Shelvacu V. wrote in post #1038960:
> I have been trying to get the ip address of clients connected to a
> simple chat server for logging purposes, but every time I use io.addr or
> io.peeraddr, the client disconnects "connection to host lost" and the
> server reports no errors. Is this because the client is connecting to
> localhost?

Nope. Try this:

    begin
      puts "[New Client]IP:" + io.peeraddr + " Client #:" + my_client_id
    rescue Exception => e
      STDERR.puts "Ooops: #{e}"
    end

and you will see:

TCPSocket
[verbose]serve() has been called
Ooops: can't convert Array into String

That is, you need io.peeraddr[3]. And when you do that, you'll find 
my_client_id needs turning into a string too, because you can't 
concatenate a String with a Fixnum.

Safer to use interpolation, which calls to_s automatically if required:

      puts "[New Client]IP:#{io.peeraddr[3]} Client #:#{my_client_id}"

You would have found this problem more easily if you'd told gserver to 
report exceptions rather than hide them. You can do this by setting 
self.debug=true inside your initialize method in your ChatServer class.

HTH,

Brian.

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