JAVA：TCP readline（）终止，二进制零

Question

I am trying to receive TCP data from a 3rd party server, whose messages are terminated with a binary zero ( '\\0' ) rather than newline ( '\\n ). From what I understand, JAVA's readline() waits for an '\\n' termination, which might be the reason that my code hangs.

try {
    socket = new Socket(hostip, portNum);
    BufferedReader inFromServer = new BufferedReader(new InputStreamReader (socket.getInputStream()));
    msg = inFromServer.readLine();
    socket.close();
    } catch (IOException e) {
        msg = "Connection failed. IOException.";
    }

Is there a way to read a message from the server, such that '\\0' will denote the end of transmission rather than '\\n' ?

Thanks

Answer 1

Just use directly the InputStreamReader :

    try {
        socket = new Socket(hostip, portNum);
        InputStreamReader in = new InputStreamReader(socket.getInputStream(), StandardCharsets.UTF_8);

        StringBuffer sb = new StringBuffer();
        int ch = 'a';

        while((ch = in.read()) != (char)0){
            if(ch == -1) break;
            System.out.println(ch);
            sb.append((char)ch);
        }

        msg = sb.toString();
        socket.close();
        } catch (IOException e) {
            msg = "Connection failed. IOException.";
        }