svn-gvsig-desktop / trunk / build / distribution / IzPack / src / lib / com / izforge / izpack / installer / WebAccessor.java @ 21757
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/*
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* $Id: WebAccessor.java 5819 2006-06-14 07:29:09Z cesar $
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* IzPack
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* Copyright (C) 2002 Johannes Lehtinen
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*
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* File : WebAccessor.java
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* Description : Prompt user for proxies and passwords
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* Author's email : mchenryc@acm.org
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* Author's Website : http://www.izforge.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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package com.izforge.izpack.installer; |
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import java.awt.BorderLayout; |
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import java.awt.Component; |
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import java.awt.Cursor; |
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import java.awt.GridLayout; |
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import java.awt.Toolkit; |
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import java.io.InputStream; |
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import java.net.Authenticator; |
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import java.net.ConnectException; |
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import java.net.InetAddress; |
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import java.net.PasswordAuthentication; |
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import java.net.URL; |
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import java.net.URLConnection; |
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import java.util.Locale; |
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import javax.swing.JDialog; |
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import javax.swing.JLabel; |
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import javax.swing.JOptionPane; |
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import javax.swing.JPanel; |
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import javax.swing.JPasswordField; |
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import javax.swing.JTextField; |
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import javax.swing.UIManager; |
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/**
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* Dialogs for password authentication and firewall specification, when needed,
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* during web installation.
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*
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* @author Chadwick McHenry
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* @version 1.0
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*/
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public class WebAccessor |
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{ |
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private Thread openerThread = null; |
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private InputStream iStream = null; |
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private Exception exception = null; |
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private Object soloCancelOption = null; |
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private Component parent = null; |
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private JDialog dialog = null; |
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private boolean tryProxy = false; |
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private JPanel passwordPanel = null; |
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private JLabel promptLabel; |
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private JTextField nameField; |
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private JPasswordField passField; |
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private JPanel proxyPanel = null; |
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private JLabel errorLabel; |
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private JTextField hostField; |
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private JTextField portField; |
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/**
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* Not yet Implemented: placeholder for headless installs.
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*
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* @throws UnsupportedOperationException
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*/
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public WebAccessor()
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{ |
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// the class should probably be rearranged to do this.
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throw new UnsupportedOperationException(); |
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} |
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/**
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* Create a WebAccessor that prompts for proxies and passwords using a
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* JDialog.
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*
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* @param parent determines the frame in which the dialog is displayed; if
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* the parentComponent has no Frame, a default Frame is used
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*/
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public WebAccessor(Component parent) |
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{ |
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this.parent = parent;
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Locale l = null; |
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if (parent != null) |
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parent.getLocale(); |
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soloCancelOption = UIManager.get("OptionPane.cancelButtonText",l);// TODO: i18n? |
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Authenticator.setDefault(new MyDialogAuthenticator()); |
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} |
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/**
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* Opens a URL connection and returns it's InputStream for the specified URL.
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*
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* @param url the url to open the stream to.
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* @return an input stream ready to read, or null on failure
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*/
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public InputStream openInputStream(URL url) |
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{ |
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// TODO: i18n everything
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Object[] options = {soloCancelOption}; |
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JOptionPane pane = new JOptionPane("Connecting to the Internet", |
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JOptionPane.INFORMATION_MESSAGE,
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JOptionPane.DEFAULT_OPTION,
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null, options, options[0]); |
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dialog = pane.createDialog(parent, "Accessing Install Files");
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pane.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); |
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Object value = null; |
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OPEN_URL: |
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while (true) |
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{ |
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startOpening(url); // this starts a thread that may dismiss the dialog before user
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dialog.setVisible(true);
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value = pane.getValue(); |
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// dialog closed or canceled (by widget)
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if (value == null || value == soloCancelOption) |
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{ |
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try {
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openerThread.interrupt();// stop the connection
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} catch (Exception e) { |
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} |
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iStream = null; // even if connection was made just after cancel |
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break;
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} |
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// dialog closed by thread so either a connection error or success!
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else if (value == JOptionPane.UNINITIALIZED_VALUE) |
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{ |
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// success!
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if (iStream != null) |
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break;
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//System.err.println(exception);
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// an exception we don't expect setting a proxy to fix
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if (! tryProxy)
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break;
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// else (exception != null)
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// show proxy dialog until valid values or cancel
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JPanel panel = getProxyPanel();
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errorLabel.setText("Unable to connect: " +exception.getMessage());
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while (true) |
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{ |
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int result = JOptionPane.showConfirmDialog(parent, panel, |
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"Proxy Configuration",
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JOptionPane.OK_CANCEL_OPTION,
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JOptionPane.QUESTION_MESSAGE);
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if (result != JOptionPane.OK_OPTION) // canceled |
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break OPEN_URL;
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String host = null; |
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String port = null; |
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try {
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InetAddress addr = InetAddress.getByName(hostField.getText()); |
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host = addr.getHostName(); |
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} catch (Exception x) { |
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errorLabel.setText("Unable to resolve Host");
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Toolkit.getDefaultToolkit().beep();
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} |
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try {
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if (host != null) |
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port = Integer.valueOf(portField.getText()).toString();
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} catch (NumberFormatException x) { |
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errorLabel.setText("Invalid Port");
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Toolkit.getDefaultToolkit().beep();
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} |
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if (host != null && port != null) { |
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//System.err.println ("Setting http proxy: "+ host +":"+ port);
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System.getProperties().put ("proxySet", "true"); |
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System.getProperties().put ("proxyHost", host); |
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System.getProperties().put ("proxyPort", port); |
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break;
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} |
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} |
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} |
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} |
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return iStream;
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} |
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private void startOpening(final URL url) |
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{ |
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openerThread = new Thread() |
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{ |
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public void run() { |
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iStream = null;
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try {
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tryProxy = false;
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URLConnection connection = url.openConnection();
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iStream = connection.getInputStream(); // just to make connection
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} catch (ConnectException x) { // could be an incorrect proxy |
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tryProxy = true;
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exception = x; |
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} catch (Exception x) { |
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// Exceptions that get here are considered cancels or missing
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// pages, eg 401 if user finally cancels auth
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exception = x; |
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} finally {
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// if dialog is in use, allow it to become visible /before/ closing
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// it, else on /fast/ connectinos, it may open later and hang!
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if (dialog != null) |
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{ |
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Thread.yield();
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dialog.setVisible(false);
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} |
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} |
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} |
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}; |
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openerThread.start(); |
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} |
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/**
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* Only to be called after an initial error has indicated a connection problem
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*/
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private JPanel getProxyPanel() |
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{ |
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if (proxyPanel == null) |
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{ |
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proxyPanel = new JPanel(new BorderLayout(5,5)); |
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errorLabel = new JLabel(); |
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JPanel fields = new JPanel(new GridLayout(2,2)); |
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String h = (String)System.getProperties().get ("proxyHost"); |
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String p = (String)System.getProperties().get ("proxyPort"); |
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hostField = new JTextField(h != null ? h : ""); |
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portField = new JTextField(p != null ? p : ""); |
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JLabel host = new JLabel("Host: "); // TODO: i18n |
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JLabel port = new JLabel("Port: "); // TODO: i18n |
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fields.add(host); |
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fields.add(hostField); |
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fields.add(port); |
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fields.add(portField); |
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JLabel exampleLabel =
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new JLabel("e.g. host=\"gatekeeper.example.com\" port=\"80\""); |
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proxyPanel.add(errorLabel, BorderLayout.NORTH);
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proxyPanel.add(fields, BorderLayout.CENTER);
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proxyPanel.add(exampleLabel, BorderLayout.SOUTH);
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} |
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proxyPanel.validate(); |
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return proxyPanel;
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} |
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private JPanel getPasswordPanel() |
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{ |
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if (passwordPanel == null) |
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{ |
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passwordPanel = new JPanel(new BorderLayout(5,5)); |
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promptLabel = new JLabel(); |
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JPanel fields = new JPanel(new GridLayout(2,2)); |
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nameField = new JTextField(); |
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passField = new JPasswordField(); |
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JLabel name = new JLabel("Name: "); // TODO: i18n |
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JLabel pass = new JLabel("Password: "); // TODO: i18n |
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fields.add(name); |
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fields.add(nameField); |
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fields.add(pass); |
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fields.add(passField); |
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passwordPanel.add(promptLabel, BorderLayout.NORTH);
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passwordPanel.add(fields, BorderLayout.CENTER);
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} |
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passField.setText("");
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return passwordPanel;
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} |
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/**
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* Authenticates via dialog when needed.
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*/
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private class MyDialogAuthenticator extends Authenticator |
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{ |
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public PasswordAuthentication getPasswordAuthentication() |
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{ |
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// TODO: i18n
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JPanel p = getPasswordPanel();
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String prompt = getRequestingPrompt();
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InetAddress addr = getRequestingSite();
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if (addr != null) |
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prompt += " (" + addr.getHostName() + ")"; |
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promptLabel.setText(prompt); |
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int result = JOptionPane.showConfirmDialog(parent, p, "Enter Password", |
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JOptionPane.OK_CANCEL_OPTION,
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JOptionPane.QUESTION_MESSAGE);
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if (result != JOptionPane.OK_OPTION) |
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return null; |
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return new PasswordAuthentication(nameField.getText(), |
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passField.getPassword()); |
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} |
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}; |
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} |
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