Sending password/login info using sockets

[jes smith]

I am trying to make a client/server program. The client will contian a gui login/password frame. It will send that information to the server. If the information is correct, the server will allow the client to access the rest of the program which is my gui menu menu. How do I send the information? I already made the gui.

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Login extends JFrame implements ActionListener
{
    JButton login;
    JPanel panel;
    JLabel label1,label2;
    final JTextField text1,text2;
    static Socket socket = null;
    static PrintWriter out = null;
    static BufferedReader in = null;

    public Login()
    {
        label1 = new JLabel();
	label1.setText("Username:");
	text1 = new JTextField(15);
	label2 = new JLabel();
	label2.setText("Password:");
	text2 = new JPasswordField(15);
	login = new JButton("Login");

	panel = new JPanel(new GridLayout(3,1));
	panel.add(label1);
	panel.add(text1);
	panel.add(label2);
	panel.add(text2);
	panel.add(login);
	add(panel,BorderLayout.CENTER);
	login.addActionListener(this);
	setTitle("LOGIN");
    }

    public void actionPerformed(ActionEvent ae)
    {
        Object source = ae.getSource();
        if(source == login)
        {
            String value1 = text1.getText();
            String value2 = text2.getText();
            out.println(value1);
            out.println(value2);
            try
            {
                String line1 = in.readLine();
                String line2 = in.readLine();
            }
            catch(IOException e)
            {
                System.out.println("login failed");
                System.exit(1);
            }
        }
    }

    public void listenSocket()
    {
        try
        {
            socket = new Socket("host", 9006);
            out = new PrintWriter(socket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            
        }
        catch (UnknownHostException e) 
	{
            System.out.println("Unknown host: host");
            System.exit(1);
	} 
	catch  (IOException e) 
	{
            System.out.println("No I/O");
            System.exit(1);
	}
    }

    public static void main(String[] args) throws UnknownHostException, IOException
    {
        Login frame = new Login();
	frame.setSize(300,100);
	frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.listenSocket();
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Server 
{
	static ServerSocket server = null;
	static Socket client = null;
	static BufferedReader in = null;
	static PrintWriter out = null;
	static String line1;
	static String line2;
	
	public static void main(String[]args) throws IOException, InstantiationException, IllegalAccessException, ClassNotFoundException, SQLException
	{
	while (true)
    	{
    		server = new ServerSocket(9006);
        	Class.forName(driver).newInstance();
        	Connection conn = DriverManager.getConnection(url, username, password);
        	System.out.println("waiting for connection");
    		client = server.accept();
    		System.out.println("connection accepted");
    		System.out.println("running...");
			
    		try
    		{in = new BufferedReader(new InputStreamReader(client.getInputStream()));
    		out = new PrintWriter(client.getOutputStream(), true);
    		
    		line1 = in.readLine();
    		line2 = in.readLine();
    		out.println(line1);
    		out.println(line2);

//        String value1 = text1.getText();                                   //i know this section has to be used but how?
//	String value2 = text2.getText();
//	if (value1.equals("employee") && value2.equals("password") || value1.equals("manager") && value2.equals("password"))
//	{
//            MainMenu menu = new MainMenu();
//            menu.show();
//            super.setVisible(false);
//	}
//	else
//        {
//            JOptionPane.showMessageDialog(this,"Incorrect username or password.", "Error", JOptionPane.ERROR_MESSAGE);
//	}

    		}
    		catch(IOException e){};
    	}
	}
}

[Ankit Tripathi]

Hi Jes,
Welcome to JavaRanch...
This link may help you.....webpage

[Joe Ess]

In the topic Ankit links to, I make a reference to RMI. If you can, use it. RMI is object-based which means you can concentrate on your program rather than the low-level details of creating a custom protocol.