Ruby TCP 套接字永远不会得到回复

Question

我使用 TCP 连接并像这样发送一些数据：

begin
  session = "mysession"
  socket = TCPSocket.new(tcpaddress, port)
  socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
  puts "sending to socket HELO " + session
  socket.write ('HELO ' + session)
  puts socket.read
  socket.close
rescue Exception => myException
   puts "Exception rescued : #{myException}"
end

套接字永远不会得到回复，但是，telnet 会：

$ telnet some_ip port
Trying some_ip...
Connected to some_ip
Escape character is '^]'.
HELO mysession
OK

如您所见，远程服务器按预期回复“OK”。怎么了？

PS：我也使用了 puts 和 send 方法。

Answer 1

也许您需要在命令中添加 CRLF：

socket.write("HELO " + session + "\r\n")