configdialog.java

简易防火墙代码

/******************************************************************
*** File ConfigDialog.java 
***
***/

import java.awt.*;
import java.io.*;
import java.net.*;
import java.applet.*;

// 
// Class:     ConfigDialog
// Abstract:  Configuration dialog box.
//

public class ConfigDialog extends Dialog 
{
    //
    // Member variables
    //
    private DataInputStream in;
    private DataOutputStream out;
    private Socket proxySocket;
	private Config config;
	private Applet applet;


    //
    // Member methods
    //
    
	//
	// Constructor
	//
	public ConfigDialog(Frame parent, String title, Config configuration,
	                    Socket proxySocket, Applet applet) 
	{
	    this(parent, configuration, proxySocket, applet);
	    setTitle(title);
	}

    //
    // Constructor
    //
	public ConfigDialog(Frame parent, Config configuration,
						Socket proxySckt, Applet myApplet)
	{
	    super(parent, true);

        applet = myApplet;
		config = configuration;
		proxySocket = proxySckt;

		//{{INIT_CONTROLS
		setLayout(null);
		addNotify();
		resize(insets().left + insets().right + 612,insets().top + insets().bottom + 505);
		setForeground(new Color(0));
		setBackground(new Color(16756655));
		textFatherProxyHost = new java.awt.TextField();
		textFatherProxyHost.reshape(insets().left + 84,insets().top + 72,164,30);
		add(textFatherProxyHost);
		textFatherProxyPort = new java.awt.TextField();
		textFatherProxyPort.reshape(insets().left + 84,insets().top + 108,76,30);
		add(textFatherProxyPort);
		label4 = new java.awt.Label("Port:");
		label4.reshape(insets().left + 12,insets().top + 108,60,22);
		add(label4);
		label3 = new java.awt.Label("Host:");
		label3.reshape(insets().left + 12,insets().top + 72,60,18);
		add(label3);
		checkboxFatherProxy = new java.awt.Checkbox("Use Father proxy");
		checkboxFatherProxy.reshape(insets().left + 12,insets().top + 36,148,24);
		add(checkboxFatherProxy);
		listDenied = new java.awt.List(0,false);
		add(listDenied);
		listDenied.reshape(insets().left + 12,insets().top + 204,162,90);
		listDenied.setFont(new Font("Dialog", Font.BOLD, 12));
		listDenied.setBackground(new Color(8421631));
		textAddDeny = new java.awt.TextField();
		textAddDeny.reshape(insets().left + 12,insets().top + 168,160,30);
		add(textAddDeny);
		label5 = new java.awt.Label("Deny access to:");
		label5.reshape(insets().left + 12,insets().top + 144,132,18);
		add(label5);
		label6 = new java.awt.Label("Traffic Management:");
		label6.reshape(insets().left + 12,insets().top + 0,192,26);
		label6.setFont(new Font("Dialog", Font.BOLD, 16));
		label6.setForeground(new Color(0));
		label6.setBackground(new Color(16756655));
		add(label6);
		checkboxCache = new java.awt.Checkbox("Use Caching");
		checkboxCache.reshape(insets().left + 312,insets().top + 36,114,24);
		add(checkboxCache);
		textCacheSize = new java.awt.TextField();
		textCacheSize.reshape(insets().left + 432,insets().top + 72,112,30);
		add(textCacheSize);
		labelCacheSize = new java.awt.Label("Cache Size:");
		labelCacheSize.reshape(insets().left + 312,insets().top + 72,108,16);
		add(labelCacheSize);
		listMasks = new java.awt.List(0,false);
		add(listMasks);
		listMasks.reshape(insets().left + 312,insets().top + 204,164,90);
		listMasks.setFont(new Font("Dialog", Font.BOLD, 12));
		listMasks.setBackground(new Color(8421631));
		textAddMask = new java.awt.TextField();
		textAddMask.reshape(insets().left + 312,insets().top + 168,160,30);
		add(textAddMask);
		buttonAddMask = new java.awt.Button("Add");
		buttonAddMask.reshape(insets().left + 504,insets().top + 168,82,24);
		add(buttonAddMask);
		buttonClearMasks = new java.awt.Button("Clear");
		buttonClearMasks.reshape(insets().left + 504,insets().top + 240,82,24);
		add(buttonClearMasks);
		buttonRemoveMask = new java.awt.Button("Remove");
		buttonRemoveMask.reshape(insets().left + 504,insets().top + 204,82,24);
		add(buttonRemoveMask);
		label2 = new java.awt.Label("Cache Management:");
		label2.reshape(insets().left + 312,insets().top + 0,192,26);
		label2.setFont(new Font("Dialog", Font.BOLD, 16));
		add(label2);
		label7 = new java.awt.Label("Do not cache...");
		label7.reshape(insets().left + 312,insets().top + 144,132,22);
		add(label7);
		buttonRestore = new java.awt.Button("Restore");
		buttonRestore.reshape(insets().left + 336,insets().top + 420,72,24);
		add(buttonRestore);
		buttonSave = new java.awt.Button("Save");
		buttonSave.reshape(insets().left + 204,insets().top + 420,72,24);
		add(buttonSave);
		buttonExit = new java.awt.Button("Exit");
		buttonExit.reshape(insets().left + 72,insets().top + 420,72,24);
		add(buttonExit);
		checkboxCleanCache = new java.awt.Checkbox("Clean cache on saving");
		checkboxCleanCache.reshape(insets().left + 312,insets().top + 108,192,24);
		add(checkboxCleanCache);
		label10 = new java.awt.Label("Proxy status:");
		label10.reshape(insets().left + 324,insets().top + 300,144,26);
		label10.setFont(new Font("Dialog", Font.BOLD, 16));
		add(label10);
		label11 = new java.awt.Label("Files cached:");
		label11.reshape(insets().left + 276,insets().top + 324,108,22);
		add(label11);
		label12 = new java.awt.Label("Bytes cached:");
		label12.reshape(insets().left + 276,insets().top+348,108,22);
		add(label12);
		labelBytesFree = new java.awt.Label("");
		labelBytesFree.reshape(insets().left + 384,insets().top+372,72,32);
		add(labelBytesFree);
		labelBytesCached = new java.awt.Label("");
		labelBytesCached.reshape(insets().left +384,insets().top+348,72,32);
		add(labelBytesCached);
		labelFilesCached = new java.awt.Label("");
		labelFilesCached.reshape(insets().left + 384,insets().top + 324,48,22);
		add(labelFilesCached);
		label16 = new java.awt.Label("Bytes free:");
		label16.reshape(insets().left + 276,insets().top + 372,108,24);
		add(label16);
		label17 = new java.awt.Label("Hits:");
		label17.reshape(insets().left + 468,insets().top + 324,72,22);
		add(label17);
		label18 = new java.awt.Label("Misses:");
		label18.reshape(insets().left + 468,insets().top + 348,72,22);
		add(label18);
		labelHitRate = new java.awt.Label("");
		labelHitRate.reshape(insets().left + 552,insets().top + 372,48,22);
		add(labelHitRate);
		labelMisses = new java.awt.Label("");
		labelMisses.reshape(insets().left + 552,insets().top + 348,48,22);
		add(labelMisses);
		labelHits = new java.awt.Label("");
		labelHits.reshape(insets().left + 552,insets().top + 324,48,22);
		add(labelHits);
		label22 = new java.awt.Label("Hit rate:");
		label22.reshape(insets().left + 468,insets().top + 372,72,24);
		add(label22);
		buttonAddDeny = new java.awt.Button("Add");
		buttonAddDeny.reshape(insets().left + 192,insets().top + 168,82,24);
		add(buttonAddDeny);
		buttonClearDenied = new java.awt.Button("Clear");
		buttonClearDenied.reshape(insets().left + 192,insets().top + 240,82,24);
		add(buttonClearDenied);
		buttonRemoveDeny = new java.awt.Button("Remove");
		buttonRemoveDeny.reshape(insets().left + 192,insets().top + 204,82,24);
		add(buttonRemoveDeny);
		textNewPassword = new java.awt.TextField();
		textNewPassword.setEchoCharacter('*');
		textNewPassword.reshape(insets().left + 130,insets().top + 336,110,30);
		add(textNewPassword);
		textConfirmPassword = new java.awt.TextField();
		textConfirmPassword.setEchoCharacter('*');
		textConfirmPassword.reshape(insets().left + 130,insets().top + 372,110,30);
		add(textConfirmPassword);
		label1 = new java.awt.Label("new password:");
		label1.reshape(insets().left + 12,insets().top + 336,112,24);
		add(label1);
		label8 = new java.awt.Label("Confirm password:");
		label8.reshape(insets().left + 12,insets().top + 372,117,24);
		add(label8);
		label9 = new java.awt.Label("Change password:");
		label9.reshape(insets().left + 12,insets().top + 300,180,26);
		label9.setFont(new Font("Dialog", Font.BOLD, 16));
		add(label9);
		buttonReset = new java.awt.Button("Reset");
		buttonReset.reshape(insets().left + 480,insets().top + 420,72,24);
		add(buttonReset);
		labelStatus = new java.awt.Label("Idle");
		labelStatus.reshape(insets().left + 84,insets().top + 456,504,19);
		add(labelStatus);
		label14 = new java.awt.Label("Status:");
		label14.reshape(insets().left + 12,insets().top + 456,72,19);
		add(label14);
		setTitle("Proxy Configuration - "+config.getProxyMachineNameAndPort());
		//}}

		//
		// Get the input/output streams of proxy socket
		//
		try
		{
            in = new DataInputStream(proxySocket.getInputStream());
            out = new DataOutputStream(proxySocket.getOutputStream());
        }
        catch (IOException e)
        {
            labelStatus.setText("Fatal error: could not connect to proxy");
        }

        //
        // Update the controls of the dialog
        //
		setControls();
	}
	

	//
    // Report error to user
	//
    void reportError(String error)
    {
        labelStatus.setText(error);
    }
    

	//
    // Check if string valid
	//
    private boolean isValidAlpha(String s)
    {
        if ( (s.indexOf(" ") == -1) &&
             (s.indexOf("?") == -1))
        {
            return true;
        }
        
        return false;
    }
    
	//
    // Check if number valid
	//
    private boolean isValidNumber(String s,long max)
    {
        long number;

        try
        {
            number = Integer.parseInt(s);
        }
        catch (NumberFormatException e)
        {
            return false;
        }
        
        return (number <= max);
    }
    
	//
    // Check that all the controls contains valid data
	//
    private boolean checkValidData()
    {
        if (checkboxFatherProxy.getState())
        {
            if (!isValidAlpha(textFatherProxyHost.getText()))
            {
                reportError("Invalid father proxy host name");
                return false;
            }
            if (!isValidNumber(textFatherProxyPort.getText(),65536))
            {
                reportError("Invalid father proxy port");
                return false;
            }
        }

        if (!isValidAlpha(textNewPassword.getText()))
        {
            reportError("Invalid new password");
            return false;
        }
        
        if (!textNewPassword.getText().equals(textConfirmPassword.getText()))
        {
            reportError("new password and confirm password do not match");
            return false;
        }
        
        if (checkboxCache.getState())
        {
            if (!isValidNumber(textCacheSize.getText(),100000000))
            {
                reportError("Invalid cache size");
                return false;
            }
        }
        
        return true;
    }   
	

	// Reset bottun was clicked
	void buttonReset_Clicked(Event event) 
	{
		config.reset();
		setControls();
		textNewPassword.setText("");
		textConfirmPassword.setText("");
		labelStatus.setText("Returned to default configuration");
	}

    // Restore bottun was clicked
	void buttonRestore_Clicked(Event event) 
	{
		setControls();
		labelStatus.setText("Configuration restored");
	}

    // Add string to Denied list box
	void textAddDeny_EnterHit(Event event) 
	{
        buttonAddDeny_Clicked(event);
	}

    // Add string to Cache Mask list box
	void textAddMask_EnterHit(Event event) 
	{
        buttonAddMask_Clicked(event);
}

    // Clear Cache Mask list box
	void buttonClearMasks_Clicked(Event event)