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/*
* IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved.
*
* http://izpack.org/
* http://izpack.codehaus.org/
*
* Copyright 2002 Johannes Lehtinen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.izforge.izpack.installer.web;
import javax.swing.*;
import java.awt.*;
import java.io.InputStream;
import java.net.*;
import java.util.Locale;
/**
* Dialogs for password authentication and firewall specification, when needed, during web
* installation.
*
* @author Chadwick McHenry
* @author Vladimir Ralev
* @version 1.0
*/
public class WebAccessor
{
private Thread openerThread = null;
private InputStream iStream = null;
private Exception exception = null;
private Object soloCancelOption = null;
private Component parent = null;
private JDialog dialog = null;
private boolean tryProxy = false;
private JPanel passwordPanel = null;
private JLabel promptLabel;
private JTextField nameField;
private JPasswordField passField;
private JPanel proxyPanel = null;
private JLabel errorLabel;
private JTextField hostField;
private JTextField portField;
private String url;
private int contentLength = -1;
/**
* Not yet Implemented: placeholder for headless installs.
*
* @throws UnsupportedOperationException
*/
public WebAccessor()
{
// the class should probably be rearranged to do this.
throw new UnsupportedOperationException();
}
/**
* Create a WebAccessor that prompts for proxies and passwords using a JDialog.
*
* @param parent determines the frame in which the dialog is displayed; if the parentComponent
* has no Frame, a default Frame is used
*/
public WebAccessor(Component parent)
{
this.parent = parent;
Locale locale = null;
if (parent != null)
{
parent.getLocale();
}
soloCancelOption = UIManager.get("OptionPane.cancelButtonText", locale);// TODO:
// i18n?
Authenticator.setDefault(new MyDialogAuthenticator());
}
/**
* Opens a URL connection and returns it's InputStream for the specified URL.
*
* @param url the url to open the stream to.
* @return an input stream ready to read, or null on failure
*/
public InputStream openInputStream(URL url)
{
setUrl(url.toExternalForm());
OPEN_URL:
while (true)
{
startOpening(url); // this starts a thread
Thread.yield();
// Wait a bit to see if the stream comes up
int retry = 28;
while (exception == null && iStream == null && retry > 0)
{
try
{
Thread.sleep(200);
retry--;
}
catch (Exception e)
{
System.out.println("In openInputStream: " + e);
}
}
/* Try to find a proxy if that failed */
// success!
if (iStream != null)
{
break;
}
// an exception we don't expect setting a proxy to fix
if (!tryProxy)
{
break;
}
// else (exception != null)
// show proxy dialog until valid values or cancel
JPanel panel = getProxyPanel();
errorLabel.setText("Unable to connect: " + exception.getMessage());
while (true)
{
int result = JOptionPane.showConfirmDialog(parent, panel, "Proxy Configuration",
JOptionPane.OK_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE);
if (result != JOptionPane.OK_OPTION) // canceled
{
break OPEN_URL;
}
String host = null;
String port = null;
try
{
InetAddress addr = InetAddress.getByName(hostField.getText());
host = addr.getHostName();
}
catch (Exception x)
{
errorLabel.setText("Unable to resolve Host");
Toolkit.getDefaultToolkit().beep();
}
try
{
if (host != null)
{
port = Integer.valueOf(portField.getText()).toString();
}
}
catch (NumberFormatException x)
{
errorLabel.setText("Invalid Port");
Toolkit.getDefaultToolkit().beep();
}
if (host != null && port != null)
{
// System.err.println ("Setting http proxy: "+ host
// +":"+ port);
System.getProperties().put("proxySet", "true");
System.getProperties().put("proxyHost", host);
System.getProperties().put("proxyPort", port);
break;
}
}
}
if (iStream == null)
{
openerThread.interrupt();
}
return iStream;
}
private void startOpening(final URL url)
{
final WebAccessor webAccessor = this;
openerThread = new Thread()
{
public void run()
{
iStream = null;
try
{
tryProxy = false;
URLConnection connection = url.openConnection();
if (connection instanceof HttpURLConnection)
{
HttpURLConnection htc = (HttpURLConnection) connection;
contentLength = htc.getContentLength();
}
//InputStream iii = echoSocket.getInputStream();
InputStream inputStream = connection.getInputStream();
iStream = new LoggedInputStream(inputStream, webAccessor); // just to make
}
catch (ConnectException x)
{ // could be an incorrect proxy
tryProxy = true;
exception = x;
}
catch (Exception x)
{
// Exceptions that get here are considered cancels or
// missing
// pages, eg 401 if user finally cancels auth
exception = x;
}
finally
{
// if dialog is in use, allow it to become visible /before/
// closing
// it, else on /fast/ connectinos, it may open later and
// hang!
if (dialog != null)
{
Thread.yield();
dialog.setVisible(false);
}
}
}
};
openerThread.start();
}
/**
* Only to be called after an initial error has indicated a connection problem
*/
private JPanel getProxyPanel()
{
if (proxyPanel == null)
{
proxyPanel = new JPanel(new BorderLayout(5, 5));
errorLabel = new JLabel();
JPanel fields = new JPanel(new GridLayout(2, 2));
String hostDefaultValue = (String) System.getProperties().get("proxyHost");
String portDefaultValue = (String) System.getProperties().get("proxyPort");
hostField = new JTextField(hostDefaultValue != null ? hostDefaultValue : "");
portField = new JTextField(portDefaultValue != null ? portDefaultValue : "");
JLabel host = new JLabel("Host: "); // TODO: i18n
JLabel port = new JLabel("Port: "); // TODO: i18n
fields.add(host);
fields.add(hostField);
fields.add(port);
fields.add(portField);
JLabel exampleLabel = new JLabel("e.g. host=\"gatekeeper.example.com\" port=\"80\"");
proxyPanel.add(errorLabel, BorderLayout.NORTH);
proxyPanel.add(fields, BorderLayout.CENTER);
proxyPanel.add(exampleLabel, BorderLayout.SOUTH);
}
proxyPanel.validate();
return proxyPanel;
}
private JPanel getPasswordPanel()
{
if (passwordPanel == null)
{
passwordPanel = new JPanel(new BorderLayout(5, 5));
promptLabel = new JLabel();
JPanel fields = new JPanel(new GridLayout(2, 2));
nameField = new JTextField();
passField = new JPasswordField();
JLabel name = new JLabel("Name: "); // TODO: i18n
JLabel pass = new JLabel("Password: "); // TODO: i18n
fields.add(name);
fields.add(nameField);
fields.add(pass);
fields.add(passField);
passwordPanel.add(promptLabel, BorderLayout.NORTH);
passwordPanel.add(fields, BorderLayout.CENTER);
}
passField.setText("");
return passwordPanel;
}
/**
* Authenticates via dialog when needed.
*/
private class MyDialogAuthenticator extends Authenticator
{
public PasswordAuthentication getPasswordAuthentication()
{
// TODO: i18n
JPanel panel = getPasswordPanel();
String prompt = getRequestingPrompt();
InetAddress addr = getRequestingSite();
if (addr != null)
{
prompt += " (" + addr.getHostName() + ")";
}
promptLabel.setText(prompt);
int result = JOptionPane.showConfirmDialog(parent, panel, "Enter Password", JOptionPane.OK_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE);
if (result != JOptionPane.OK_OPTION)
{
return null;
}
return new PasswordAuthentication(nameField.getText(), passField.getPassword());
}
}
public String getUrl()
{
return url;
}
public void setUrl(String url)
{
this.url = url;
}
public int getContentLength()
{
return contentLength;
}
}
