httpsurlstreamhandlerfactory.java

这是linux下ssl vpn的实现程序

/*
 *  SSL-Explorer
 *
 *  Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2 of
 *  the License, or (at your option) any later version.
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public
 *  License along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
			
package com.maverick.ssl.https;

import java.io.IOException;
import java.net.URLStreamHandler;
import java.net.URLStreamHandlerFactory;

public class HttpsURLStreamHandlerFactory
    implements URLStreamHandlerFactory {

  static String packagesPropertyName = "java.protocol.handler.pkgs";
  static String packageProperty = "com.maverick.ssl";

  public HttpsURLStreamHandlerFactory() {
  }

  public URLStreamHandler createURLStreamHandler(String protocol) {
    if (protocol.equalsIgnoreCase("https")) {
      return new Handler();
    }
    else {
      return null;
    }
  }

  public static void addHTTPSSupport() throws IOException,
      SecurityException {

    String packagesProperty = System.getProperty(packagesPropertyName, "");
    int index = packagesProperty.indexOf(packageProperty + "|");
    if (index >= 0) {
      packagesProperty = packagesProperty.substring(0, index) +
          packagesProperty.substring(index + packageProperty.length() + 1);
    }
    index = packagesProperty.indexOf("|" + packageProperty);
    if (index >= 0) {
      packagesProperty = packagesProperty.substring(0, index) +
          packagesProperty.substring(index + packageProperty.length() + 1);
    }
    if (packagesProperty.equals(packageProperty) ||
        packagesProperty.equals("")) {
      packagesProperty = packageProperty;
    }
    else {
      packagesProperty = packageProperty + "|" + packagesProperty;
    }
    System.getProperties().put(packagesPropertyName, packagesProperty);
  }

  public static void removeHTTPSSupport() throws SecurityException {

    String packagesProperty = System.getProperty(packagesPropertyName, "");
    int index = packagesProperty.indexOf(packageProperty + "|");
    if (index >= 0) {
      packagesProperty = packagesProperty.substring(0, index) +
          packagesProperty.substring(index + packageProperty.length() + 1);
    }
    index = packagesProperty.indexOf("|" + packageProperty);
    if (index >= 0) {
      packagesProperty = packagesProperty.substring(0, index) +
          packagesProperty.substring(index + packageProperty.length() + 1);
    }
    if (packagesProperty.equals(packageProperty)) {
      packagesProperty = "";
    }
    System.getProperties().put(packagesPropertyName, packagesProperty);
  }

  public static void setHTTPProxyHost(String host, int port,
                                       String username, String password,
                                       boolean isSecure) throws
      SecurityException {
    System.getProperties().put
        (HttpsURLConnection.httpProxyHostProperty, host);
    System.getProperties().put
        (HttpsURLConnection.httpProxyPortProperty, "" + port);
    System.getProperties().put
        (HttpsURLConnection.httpProxyUsernameProperty, "" + username);
    System.getProperties().put
        (HttpsURLConnection.httpProxyPasswordProperty, "" + password);
    System.getProperties().put
        (HttpsURLConnection.httpProxySecureProperty, "" + String.valueOf(isSecure));
  }

  public static void clearHTTPProxyHost() throws SecurityException {
    System.getProperties().remove
        (HttpsURLConnection.httpProxyHostProperty);
    System.getProperties().remove
        (HttpsURLConnection.httpProxyPortProperty);
    System.getProperties().remove
        (HttpsURLConnection.httpProxyUsernameProperty);
    System.getProperties().remove
        (HttpsURLConnection.httpProxyPasswordProperty);
    System.getProperties().remove
        (HttpsURLConnection.httpProxySecureProperty);
  }
}