From: Hal Fulton <hal9000@...>
Date: 2004-04-24T08:41:26+09:00
Subject: Playing with sockets...

I'm writing a little expect-like piece of code and trying to test it
by connecting to a telnet port.

Not working at all for me.

Code is shown below.

And here's the result:

[hal@dhcppc3]$ ruby repro.rb
"\377\375\030\377\375\037\377\375#\377\375'\377\375$"
repro.rb:14:in `wait': Timed out waiting for login: (RuntimeError)
         from repro.rb:37

What's up??

Thanks,
Hal


require "socket"
class Talk
   def initialize(input,wait=nil)
     @in, @out, @wait = input, input, wait
     @data = ""
   end

   def wait(str)
     pos = nil
     tmp = ""
     until pos = @data.index(str)
       unless IO.select([@in],nil,nil,@wait)
         p @data
         raise "Timed out waiting for #{str}"
       end
       begin
         @data << tmp = @in.getc
       rescue EOFError, TypeError
         raise "EOF..."
       end
     end
   end

   def send(str)
     unless IO.select(nil, [@out], nil, @wait)
       raise "Timed out writing #{str}"
     end
     @out.syswrite(str)
   end
end


sock = TCPSocket.open("hypermetrics.com","telnet")
sock.sync = true

t = Talk.new(sock,10)
t.wait "login:"
t.send "bob\n"
t.wait "Password:"
t.send "foobar\n"
t.wait "Login incorrect"

sock.close