Proxy HTTP en Java avec interface utilisateur
Pour vous simplifier la vie voici le version java du proxy http.
Voilà à quoi ça ressemble:
Les deux popups servent à configurer le proxy, le port sur lequel
il écoute et si il doit se connecter vers un autre proxy ou pas.
La fenêtre principale est découpée en deux partie, à
gauche le texte reçu du browser, à droite celui reçu du serveur.
Tant que le checkbox n'est pas selectionné le message n'est pas envoyé,
il est donc possible de modifier la requête avant de l'envoyer.
n:cal SetSyn('java')
:so $VIMRUNTIME/syntax/2html.vim
t
import java.net.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;
import java.awt.*;
public class GProxy extends JFrame
{
public class ProxyDialog extends JDialog
{
JTextField hostTF, portTF;
public ProxyDialog(Frame parent, boolean modal)
{
super(parent, modal);
JPanel panel1, panel2, panel3;
JButton okButton, cancelButton;
Container contentPane = this.getContentPane();
panel1 = new JPanel();
panel1.setLayout(new FlowLayout(FlowLayout.CENTER));
contentPane.add(panel1, BorderLayout.SOUTH);
okButton = new JButton("OK");
panel1.add(okButton);
cancelButton = new JButton("Cancel");
panel1.add(cancelButton);
panel2 = new JPanel();
panel2.setLayout(new FlowLayout(FlowLayout.CENTER));
contentPane.add( panel2, BorderLayout.NORTH);
panel2.add(new JLabel("Proxy ? "));
panel2.add(useProxy);
panel3 = new JPanel();
panel3.setLayout(new FlowLayout(FlowLayout.CENTER));
contentPane.add(panel3, BorderLayout.CENTER);
hostTF = new JTextField(proxy, 20);
portTF = new JTextField("" + proxyport, 5);
panel3.add(hostTF);
panel3.add(portTF);
setTitle("Proxy info");
pack();
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event)
{
dispose();
setVisible(false);
}
});
okButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event)
{
proxy = hostTF.getText();
proxyport = Integer.parseInt(portTF.getText());
dispose();
setVisible(false);
}
});
}
}
public class PortDialog extends JDialog
{
JTextField portTF;
public PortDialog(Frame parent, boolean modal)
{
super(parent, modal);
JPanel panel1, panel3;
JButton okButton, cancelButton;
Container contentPane = this.getContentPane();
panel1 = new JPanel();
panel1.setLayout(new FlowLayout(FlowLayout.CENTER));
contentPane.add(panel1, BorderLayout.SOUTH);
okButton = new JButton("OK");
panel1.add(okButton);
cancelButton = new JButton("Cancel");
panel1.add(cancelButton);
panel3 = new JPanel();
panel3.setLayout(new FlowLayout(FlowLayout.CENTER));
contentPane.add(panel3, BorderLayout.CENTER);
panel3.add(new JLabel("Proxy port"));
portTF = new JTextField("" + port, 5);
panel3.add(portTF);
setTitle("Proxy info");
pack();
cancelButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event)
{
dispose();
setVisible(false);
}
});
okButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event)
{
port = Integer.parseInt(portTF.getText());
try {
s.close();
s = new ServerSocket(port);
} catch (Exception e) {};
dispose();
setVisible(false);
}
});
}
}
class OneServeur extends Thread {
private Socket socket, socketToWeb;
private BufferedReader fromBrowser;
private PrintWriter toBrowser;
private PrintWriter toWeb;
private BufferedReader fromWeb;
public OneServeur() throws IOException {
start();
}
public void run() {
while ( true ) {
try {
socket = s.accept();
fromBrowser = new BufferedReader(
new InputStreamReader ( socket.getInputStream()));
toBrowser = new PrintWriter(
new BufferedWriter (
new OutputStreamWriter (
socket.getOutputStream())),true);
String str, targetHost="", httpHeader="";
while(true) {
str = fromBrowser.readLine();
httpHeader += str + "\r\n";
if ( str.startsWith("Host: " ) ) targetHost = str.substring(6);
if ( str.length() == 0 ) break;
}
if ( useProxy.isSelected() )
socketToWeb = new Socket(InetAddress.getByName(proxy),proxyport);
else
socketToWeb = new Socket(InetAddress.getByName(targetHost),80);
fromWeb = new BufferedReader(
new InputStreamReader ( socketToWeb.getInputStream()));
toWeb = new PrintWriter(
new BufferedWriter (
new OutputStreamWriter (
socketToWeb.getOutputStream())),true);
TAfromBw.setText(httpHeader);
while ( ! autoBw.isSelected() ) sleep(500) ;
toWeb.println(TAfromBw.getText());
TAfromWeb.setText("");
while ( true ) {
str = fromWeb.readLine();
if ( str == null ) break;
TAfromWeb.append(str+"\r\n");
}
while ( ! autoWeb.isSelected() ) sleep(500) ;
toBrowser.println(TAfromWeb.getText());
socket.close();
socketToWeb.close();
} catch ( Exception e) {
}
}
}
}
public int port = 12345;
public int proxyport = 8080;
public String proxy = "proxy";
private ServerSocket s;
private JCheckBox useProxy = new JCheckBox("", true);
private JCheckBox autoBw = new JCheckBox("", false);
private JCheckBox autoWeb = new JCheckBox("", false);
private JTextArea TAfromBw = new JTextArea(10,20);
private JTextArea TAfromWeb = new JTextArea(10,20);
public GProxy() throws IOException {
JMenuBar menuBar = new JMenuBar();
JButton closeButton = new JButton("Close");
JPanel bwPanel = new JPanel();
JPanel bwCmd = new JPanel();
JPanel webPanel = new JPanel();
JPanel webCmd = new JPanel();
JScrollPane webPane, bwPane;
Container contentPane = this.getContentPane();
JPanel Core = new JPanel();
Core.setLayout(new BorderLayout());
bwPanel.setLayout(new BorderLayout());
webPanel.setLayout(new BorderLayout());
setJMenuBar(menuBar);
JMenu fMenu = new JMenu("File");
menuBar.add(fMenu);
JMenuItem proxyItem = new JMenuItem("Set Proxy", 2);
fMenu.add(proxyItem);
JMenuItem portItem = new JMenuItem("Set Port", 2);
fMenu.add(portItem);
fMenu.addSeparator();
JMenuItem exitItem = new JMenuItem("Exit", 2);
fMenu.add(exitItem);
webPane = new JScrollPane(TAfromWeb,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
bwPane = new JScrollPane(TAfromBw,
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
webCmd.add(new JLabel("Send")); webCmd.add(autoWeb);
bwCmd.add(new JLabel("Send")); bwCmd.add(autoBw);
webPanel.add(webPane, BorderLayout.NORTH );
bwPanel.add(bwPane, BorderLayout.NORTH );
webPanel.add(webCmd, BorderLayout.SOUTH );
bwPanel.add(bwCmd, BorderLayout.SOUTH );
Core.add(bwPanel, BorderLayout.WEST);
Core.add(webPanel, BorderLayout.EAST);
contentPane.add(Core);
// add listeners for the window and the various buttons
this.addWindowListener( new WindowAdapter(){
public void windowClosing(WindowEvent e){
setVisible(false);
dispose();
System.exit(0);
}});
exitItem.addActionListener( new ActionListener(){
public void actionPerformed(ActionEvent e){
System.exit(0);
}});
proxyItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
changeProxy();
}});
portItem.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
changePort();
}});
pack();
s = new ServerSocket(port);
new OneServeur();
}
protected void changeProxy()
{
new ProxyDialog(this, true).show();
}
protected void changePort()
{
new PortDialog(this, true).show();
}
public static void main ( String args[] ) {
try {
(new GProxy()).setVisible(true);
} catch ( Exception e ) {}
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