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# socket example - server side
# usage: ruby svr.rb

# this server might be blocked by an ill-behaved client.
# see tsvr.rb which is safe from client blocking.

require "socket"

gs = TCPserver.open(0)
addr = gs.addr
addr.shift
printf("server is on %s\n", addr.join(":"))
socks = [gs]

loop do
  nsock = select(socks);
  next if nsock == nil
  for s in nsock[0]
    if s == gs
      ns = s.accept
      socks.push(ns)
      print(s, " is accepted\n")
    else
      if s.eof?
print(s, " is gone\n")
s.close
socks.delete(s)
      # single thread gets may block whole service
      elsif str = s.gets
s.write(str)
      end
    end
  end
end
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