握手后SSLSocket getOutputStream（）阻塞

Question

I am opening an SSLSocket on the client side to connect to the server. But trying to get the socket.getOutputStream() blocks the code, without outputting any errors. I am flushing both streams, but it still doesn't work.

Server:

        SSLSocket socket = (SSLSocket) serverSocket.accept();
        socket.setUseClientMode(false);
        try{
        socket.setSoTimeout(0);
        socket.setKeepAlive(true);
        socket.addHandshakeCompletedListener(handshakeCompletedEvent -> {
            try{
                reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));
                writer.println("Setup"); writer.flush();

                while(running){
                    if(!socket.isConnected() || socket.isClosed()){
                        disconnect();
                        return;
                    }
                    for(Iterator<String> pendingIterator = pendingMessages.iterator(); pendingIterator.hasNext();){
                        String message = pendingIterator.next();
                        pendingIterator.remove();
                        writer.println(message); writer.flush();
                    }

                    //Auto decrypt when message arrives, but no thread blocking
                    if(reader.ready()){
                        String line = reader.readLine();
                        System.out.println(line);
                    }
                }
            }catch(Exception e){
                e.printStackTrace();
            }
        });
        socket.startHandshake();
    }catch(Exception e){
        e.printStackTrace();
        disconnect();
    }

Client:

            socket.addHandshakeCompletedListener(new HandshakeCompletedListener(){
            @Override
            public void handshakeCompleted(HandshakeCompletedEvent handshakeCompletedEvent){
                try{
                    Log.i("Update", "Did handshake");

                    writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));
                    writer.flush();
                    Log.i("Update", "Writer");
                    reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    Log.i("Update", "Reader");

                    while(isRunning){
                        try{
                            writer.println("Test");
                            writer.flush();
                            Log.i("DATA", "DATA SENT");
                        }catch(Exception e){
                            e.printStackTrace();
                        }
                    }

                    writer.close();
                    reader.close();
                    socket.close();
                }catch(Exception e){
                    e.printStackTrace();
                }
            }
        });
        socket.startHandshake();

Answer 1

You are misusing the handshake completed listener. Its purpose is to let to check he peer certificate, negotiated cipher suite, etc. Not to carry out the transaction. Remove it all and put it inline. You don't need even to call startHandshake() . It will happen automatically on the first I/O.