import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringReader;
import java.net.Socket;

import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/*
 * Created on 2005/07/12
 *
 * Simple Web Client 
 * 
 * copyright(c) 2005 YAGI Hiroto All Right Reserved
 *
 * 2005/07/12 ver 0.5 ����
 * 
 */
public class SimpleWebClient extends JFrame {
 
  private final String[] HTTP_METHOD = {
      "OPTIONS",
      "GET",
      "HEAD",
      "POST",
      "PUT",
      "DELETE",
      "TRACE",
      "CONNECT"
  };
  
  private final String[] HTTP_VERSION = {
      "HTTP/1.0",
      "HTTP/1.1"
  };
  
  private JComboBox  cmbMethod     = null;
  private JComboBox  cmbHttpVer    = null;
  private JTextField txtRequestUri = null;
  private JTextField txtHost       = null;
  private JTextField txtPort       = null;
  private JTextArea  txtRequest    = null;
  private JTextArea  txtResult     = null;
  private JButton    btnRequest    = null;
  
  public SimpleWebClient() {
    super();
    initialize();
  }
  
  private void initialize() {
    Container container = this.getContentPane();
    this.setSize(600,400);
    this.setTitle("Simple Web Client");
    
    container.setLayout(new BorderLayout());
    container.add(getControlPane(),    BorderLayout.NORTH);
    container.add(getResultTextArea(), BorderLayout.CENTER);
  }
  
  private JPanel getControlPane() {
    JPanel controlPane = new JPanel();
    controlPane.setLayout(new BoxLayout(controlPane,BoxLayout.Y_AXIS));
    
    JPanel chosePane = new JPanel();
    chosePane.setLayout(new BoxLayout(chosePane, BoxLayout.X_AXIS));
    chosePane.add(new JLabel(" http method : "));
    chosePane.add(getMethodCombo());
    chosePane.add(new JLabel(" request-uri : http://"));
    chosePane.add(getRequestUriTextField());
    chosePane.add(new JLabel(" http-version : "));
    chosePane.add(getHttpVer());
    
    JPanel hostInfoPane = new JPanel();
    hostInfoPane.setLayout(new BoxLayout(hostInfoPane, BoxLayout.X_AXIS));
    hostInfoPane.add(new JLabel(" host : "));
    hostInfoPane.add(getHostTextField());
    hostInfoPane.add(new JLabel(" port : "));
    hostInfoPane.add(getPortTextField());
    hostInfoPane.add(getRequestButton());
    
    JPanel requestPane = new JPanel();
    requestPane.setLayout(new BoxLayout(requestPane, BoxLayout.X_AXIS));
    requestPane.add(getRequextTextArea());
    
    controlPane.add(chosePane);
    controlPane.add(requestPane);
    controlPane.add(hostInfoPane);
    
    return controlPane;
  }
  
  private JComboBox getMethodCombo() {
    cmbMethod = new JComboBox(HTTP_METHOD);
    cmbMethod.addActionListener(new RequestLineChangeLisntner());
    return cmbMethod;
  }
  
  private JComboBox getHttpVer() {
    cmbHttpVer = new JComboBox(HTTP_VERSION);
    cmbHttpVer.addActionListener(new RequestLineChangeLisntner());
    return cmbHttpVer;
  }
  
  private JTextField getRequestUriTextField() {
    txtRequestUri = new JTextField("localhost:8080/index.jsp", 20);
    txtRequestUri.addActionListener(new RequestLineChangeLisntner());
    return txtRequestUri; 
  }
  
  private JTextField getHostTextField() {
    txtHost = new JTextField("localhost",10);
    return txtHost; 
  }
  
  private JTextField getPortTextField() {
    txtPort = new JTextField("8080", 4);
    return txtPort; 
  }
  
  private JScrollPane getRequextTextArea() {
    txtRequest = new JTextArea(4,20);
    return new JScrollPane(txtRequest);
  }
  
  private JScrollPane getResultTextArea() {
    txtResult  = new JTextArea(20,20);
    return new JScrollPane(txtResult);
  }
  
  private JButton getRequestButton() {
    btnRequest = new JButton("request");
    btnRequest.addActionListener(
        new ActionListener(){
          public void actionPerformed(ActionEvent e) {
            Thread th = new Thread(new RequestProcess());
            th.run();
          }
        }
    );
    return btnRequest;
  }
  
  private void changeRequestLine() {
    try {
      StringBuffer request = new StringBuffer();
      
      request.append(HTTP_METHOD[cmbMethod.getSelectedIndex()]);
      request.append(" ");
      request.append("http://");
      request.append(txtRequestUri.getText());
      request.append(" ");
      request.append(HTTP_VERSION[cmbHttpVer.getSelectedIndex()]);
      request.append("\n");
      
      BufferedReader reader = new BufferedReader(new StringReader(txtRequest.getText()));
      String line = null;
      int linCnt = 0;
      while((line = reader.readLine()) != null) {
        if (linCnt > 0) {
          request.append(line);
          request.append("\n");
        }
        linCnt++;
      }
      txtRequest.setText(request.toString());
      
    }catch (IOException ioe) {
      ioe.printStackTrace();
      txtResult.setText(ioe.toString());
    }
  }
  
  private class RequestLineChangeLisntner implements ActionListener {
    public void actionPerformed(ActionEvent e) {
      changeRequestLine();
    }
  }
  
  private class RequestProcess implements Runnable {
    public void run() {
      Socket sok = null;
      PrintWriter out = null;
      BufferedReader in = null;
      try {
        txtResult.setText("");
        btnRequest.setEnabled(false);
        String host = txtHost.getText();
        int port = Integer.parseInt(txtPort.getText());
        
        sok = new Socket(host ,port);
        out = new PrintWriter(sok.getOutputStream(), true);
        in = new BufferedReader(new InputStreamReader(sok.getInputStream()));
        
        String requestdata = txtRequest.getText();
        if (requestdata.trim().length() == 0) {
          changeRequestLine();
          requestdata = txtRequest.getText();
        }
        
        StringBuffer request = new StringBuffer();
        BufferedReader reader = new BufferedReader(new StringReader(requestdata));
        String line = null;
        int linCnt = 0;
        while((line = reader.readLine()) != null) {
          request.append(line);
          request.append("\r\n");
        }      
        
        out.println(request);
        out.flush();
        
        StringBuffer response = new StringBuffer();
        while((line = in.readLine()) != null) {
          response.append(line);
          response.append("\n");
        }
        txtResult.setText(response.toString());
      }catch(Exception e) {
        e.printStackTrace();
        txtResult.setText(e.toString());
      }finally {
        btnRequest.setEnabled(true);
        try {
          if (in != null) in.close();
          if (out != null) out.close();
          if (sok != null) sok.close();
        }catch(Exception e){}
      } 
    }
  }

  public static void main(String[] args) {
    SimpleWebClient me = new SimpleWebClient();
    me.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    me.setVisible(true);
  }
}