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Groups > comp.lang.java.programmer > #12960

Socket problem: read & write to same socket

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I want to establish connection to a server(written by myself in Go language), read from socket, and then write into socket.

The connection can be established, and it reads correctly. But after that and when I want to write to socket, it closes the connection. I used wireshark to listen to the packets. I saw my program sent a FIN to the server side. So the server receives nothing. 

Note that the server side only sends one line into socket.

I later wrote a server in Java and a client in Go. They work fine in both read and write.

Thanks in advance!



import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;



public class DeserializerTester {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		Socket s = null;
		BufferedReader in = null;
		BufferedWriter out = null;
		//PrintWriter out = null;

		try {
			s = new Socket("127.0.0.1", 9999);
			in = new BufferedReader(new InputStreamReader(s.getInputStream()));
			//out = new PrintWriter(s.getOutputStream(), false);
			out = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
		} catch (UnknownHostException e) {
			System.err.println("Unknown host");
			System.exit(0);
		} catch (IOException e) {
			System.err.println("IO error");
			System.exit(1);
		}

		String msg = "";

		msg = in.readLine();
		System.out.println(msg);

		out.write("\"hi, socket\"");
		s.close();
	}

}

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Thread

Socket problem: read & write to same socket liyaohua.bupt@gmail.com - 2012-03-13 09:01 -0700
  Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 12:14 -0400
    Re: Socket problem: read & write to same socket liyaohua.bupt@gmail.com - 2012-03-13 09:30 -0700
      Re: Socket problem: read & write to same socket Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-03-13 10:30 -0700
  Re: Socket problem: read & write to same socket Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-13 21:33 +0000
    Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 17:48 -0400
      Re: Socket problem: read & write to same socket Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-13 22:03 +0000
        Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 18:25 -0400
          Re: Socket problem: read & write to same socket Lew <lewbloch@gmail.com> - 2012-03-13 15:38 -0700
            Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 18:47 -0400
              Re: Socket problem: read & write to same socket Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-13 23:33 +0000
                Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 19:35 -0400
                Re: Socket problem: read & write to same socket Paul Cager <paul.cager@googlemail.com> - 2012-03-14 02:51 -0700
                Re: Socket problem: read & write to same socket Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-15 00:45 +0000
                Re: Socket problem: read & write to same socket Paul Cager <paul.cager@googlemail.com> - 2012-03-15 03:18 -0700
                Re: Socket problem: read & write to same socket RedGrittyBrick <RedGrittyBrick@spamweary.invalid> - 2012-03-14 16:22 +0000
                Re: Socket problem: read & write to same socket glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-03-15 01:33 +0000
                Re: Socket problem: read & write to same socket Nigel Wade <nmw@le.ac.uk> - 2012-03-15 12:30 +0000
          Re: Socket problem: read & write to same socket Martin Gregorie <martin@address-in-sig.invalid> - 2012-03-13 23:00 +0000
            Re: Socket problem: read & write to same socket Arne Vajhøj <arne@vajhoej.dk> - 2012-03-13 19:36 -0400

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