browserlauncher.java

这是linux下ssl vpn的实现程序

          errorMessage = se.getMessage();
          return false;
        } catch (IllegalAccessException iae) {
          errorMessage = iae.getMessage();
          return false;
        }
        break;
      case MRJ_3_0 :
        try {
          Class linker = Class.forName("com.apple.mrj.jdirect.Linker");
          Constructor constructor = linker.getConstructor(new Class[]{Class.class});
          linkage = constructor.newInstance(new Object[]{BrowserLauncher.class});
        } catch (ClassNotFoundException cnfe) {
          errorMessage = cnfe.getMessage();
          return false;
        } catch (NoSuchMethodException nsme) {
          errorMessage = nsme.getMessage();
          return false;
        } catch (InvocationTargetException ite) {
          errorMessage = ite.getMessage();
          return false;
        } catch (InstantiationException ie) {
          errorMessage = ie.getMessage();
          return false;
        } catch (IllegalAccessException iae) {
          errorMessage = iae.getMessage();
          return false;
        }
        break;
      case MRJ_3_1 :
      case MRJ_COCOA :
        String className;
        if (jvm == MRJ_3_1) {
          className = "com.apple.mrj.MRJFileUtils";
        } else {
          className = "com.apple.eio.FileManager";
        }
        try {
          mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
          openURL = mrjFileUtilsClass.getDeclaredMethod("openURL", new Class[]{String.class});
        } catch (ClassNotFoundException cnfe) {
          errorMessage = cnfe.getMessage();
          return false;
        } catch (NoSuchMethodException nsme) {
          errorMessage = nsme.getMessage();
          return false;
        }
        break;
      default :
        break;
    }
    return true;
  }

  /**
   * Loads the classes, fields, and methods needed when running under MRJ 2.0.
   * Sets <code>errorMessage</code> if it fails.
   *
   * @return <code>true</code> if all operations succeeded; <code>false</code>
   *         otherwise
   */
  private static boolean loadMRJ20Classes() {
    try {
      Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
      Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
      Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
      Class aeClass = Class.forName("com.apple.MacOS.ae");
      aeDescClass = Class.forName("com.apple.MacOS.AEDesc");

      aeTargetConstructor = aeTargetClass.getDeclaredConstructor(new Class[]{int.class});
      appleEventConstructor = appleEventClass.getDeclaredConstructor(new Class[]{int.class, int.class, aeTargetClass, int.class,
          int.class});
      aeDescConstructor = aeDescClass.getDeclaredConstructor(new Class[]{String.class});

      makeOSType = osUtilsClass.getDeclaredMethod("makeOSType", new Class[]{String.class});
      putParameter = appleEventClass.getDeclaredMethod("putParameter", new Class[]{int.class, aeDescClass});
      sendNoReply = appleEventClass.getDeclaredMethod("sendNoReply", new Class[]{});

      Field keyDirectObjectField = aeClass.getDeclaredField("keyDirectObject");
      keyDirectObject = (Integer) keyDirectObjectField.get(null);
      Field autoGenerateReturnIDField = appleEventClass.getDeclaredField("kAutoGenerateReturnID");
      kAutoGenerateReturnID = (Integer) autoGenerateReturnIDField.get(null);
      Field anyTransactionIDField = appleEventClass.getDeclaredField("kAnyTransactionID");
      kAnyTransactionID = (Integer) anyTransactionIDField.get(null);
    } catch (ClassNotFoundException cnfe) {
      errorMessage = cnfe.getMessage();
      return false;
    } catch (NoSuchMethodException nsme) {
      errorMessage = nsme.getMessage();
      return false;
    } catch (NoSuchFieldException nsfe) {
      errorMessage = nsfe.getMessage();
      return false;
    } catch (IllegalAccessException iae) {
      errorMessage = iae.getMessage();
      return false;
    }
    return true;
  }

  /**
   * Attempts to locate the default web browser on the local system. Caches the
   * result so it only locates the browser once for each use of this class per
   * JVM instance.
   *
   * @return The browser for the system. Note that this may not be what you
   *         would consider to be a standard web browser; instead, it's the
   *         application that gets called to open the default web browser. In
   *         some cases this will be a non-String object that provides the means
   *         of calling the default browser.
   */
  private static Object locateBrowser() {
    if (browser != null) {
      return browser;
    }
    switch (jvm) {
      case MRJ_2_0 :
        try {
          Integer finderCreatorCode = (Integer) makeOSType.invoke(null, new Object[]{FINDER_CREATOR});
          Object aeTarget = aeTargetConstructor.newInstance(new Object[]{finderCreatorCode});
          Integer gurlType = (Integer) makeOSType.invoke(null, new Object[]{GURL_EVENT});
          Object appleEvent = appleEventConstructor.newInstance(new Object[]{gurlType, gurlType, aeTarget, kAutoGenerateReturnID,
              kAnyTransactionID});
          // Don't set browser = appleEvent because then the next time we call
          // locateBrowser(), we'll get the same AppleEvent, to which we'll
          // already have
          // added the relevant parameter. Instead, regenerate the AppleEvent
          // every time.
          // There's probably a way to do this better; if any has any ideas,
          // please let
          // me know.
          return appleEvent;
        } catch (IllegalAccessException iae) {
          browser = null;
          errorMessage = iae.getMessage();
          return browser;
        } catch (InstantiationException ie) {
          browser = null;
          errorMessage = ie.getMessage();
          return browser;
        } catch (InvocationTargetException ite) {
          browser = null;
          errorMessage = ite.getMessage();
          return browser;
        }
      case MRJ_2_1 :
        File systemFolder;
        try {
          systemFolder = (File) findFolder.invoke(null, new Object[]{kSystemFolderType});
        } catch (IllegalArgumentException iare) {
          browser = null;
          errorMessage = iare.getMessage();
          return browser;
        } catch (IllegalAccessException iae) {
          browser = null;
          errorMessage = iae.getMessage();
          return browser;
        } catch (InvocationTargetException ite) {
          browser = null;
          errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
          return browser;
        }
        String[] systemFolderFiles = systemFolder.list();
        // Avoid a FilenameFilter because that can't be stopped mid-list
        for (int i = 0; i < systemFolderFiles.length; i++) {
          try {
            File file = new File(systemFolder, systemFolderFiles[i]);
            if (!file.isFile()) {
              continue;
            }
            // We're looking for a file with a creator code of 'MACS' and
            // a type of 'FNDR'. Only requiring the type results in non-Finder
            // applications being picked up on certain Mac OS 9 systems,
            // especially German ones, and sending a GURL event to those
            // applications results in a logout under Multiple Users.
            Object fileType = getFileType.invoke(null, new Object[]{file});
            if (FINDER_TYPE.equals(fileType.toString())) {
              Object fileCreator = getFileCreator.invoke(null, new Object[]{file});
              if (FINDER_CREATOR.equals(fileCreator.toString())) {
                browser = file.toString(); // Actually the Finder, but that's OK
                return browser;
              }
            }
          } catch (IllegalArgumentException iare) {
            browser = null;
            errorMessage = iare.getMessage();
            return null;
          } catch (IllegalAccessException iae) {
            browser = null;
            errorMessage = iae.getMessage();
            return browser;
          } catch (InvocationTargetException ite) {
            browser = null;
            errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
            return browser;
          }
        }
        browser = null;
        break;
      case MRJ_3_0 :
      case MRJ_3_1 :
        browser = ""; // Return something non-null
        break;
      case WINDOWS_NT :
        browser = "cmd.exe";
        break;
      case WINDOWS_9x :
        browser = "command.com";
        break;
      case OTHER :
      default :
        // On systems other than Windows and the Mac, we try via a rather Unix-
        // specific hack to read the BROWSER environment variable
        // <http://tuxedo.org/~esr/BROWSER/>. If we can't read that variable or
        // it isn't set, we use Netscape.
        // Note: This is commented out for now. It'll work soon.
        browser = getEnvironmentBrowser();
        if (browser == null) {
          browser = "netscape";
        }
        break;
    }
    return browser;
  }

  /**
   * Attempts to open the default web browser to the given URL.
   *
   * @param url
   *          The URL to open
   * @throws IOException
   *           If the web browser could not be located or does not run
   */
  public static void openURL(String url) throws IOException {
    if (!loadedWithoutErrors) {
      throw new IOException("Exception in finding browser: " + errorMessage);
    }


    if(browserCommand != null) {
      String[] cmd = splitString(browserCommand, ' ', '"', '\\');
      String[] cmde = new String[cmd.length + 1];
      System.arraycopy(cmd, 0, cmde, 0 , cmd.length);
      cmde[cmd.length] = url;
      Runtime.getRuntime().exec(cmde);
      return;
    }

    Object browser = locateBrowser();
    if (browser == null) {
      throw new IOException("Unable to locate browser: " + errorMessage);
    }

    switch (jvm) {
      case MRJ_2_0 :
        Object aeDesc = null;
        try {
          aeDesc = aeDescConstructor.newInstance(new Object[]{url});
          putParameter.invoke(browser, new Object[]{keyDirectObject, aeDesc});
          sendNoReply.invoke(browser, new Object[]{});
        } catch (InvocationTargetException ite) {
          throw new IOException("InvocationTargetException while creating AEDesc: " + ite.getMessage());
        } catch (IllegalAccessException iae) {
          throw new IOException("IllegalAccessException while building AppleEvent: " + iae.getMessage());
        } catch (InstantiationException ie) {
          throw new IOException("InstantiationException while creating AEDesc: " + ie.getMessage());
        } finally {
          aeDesc = null; // Encourage it to get disposed if it was created
          browser = null; // Ditto
        }
        break;
      case MRJ_2_1 :
        Runtime.getRuntime().exec(new String[]{(String) browser, url});
        break;
      case MRJ_3_0 :
        int[] instance = new int[1];
        int result = ICStart(instance, 0);
        if (result == 0) {
          int[] selectionStart = new int[]{0};
          byte[] urlBytes = url.getBytes();
          int[] selectionEnd = new int[]{urlBytes.length};
          result = ICLaunchURL(instance[0], new byte[]{0}, urlBytes, urlBytes.length, selectionStart, selectionEnd);
          if (result == 0) {
            // Ignore the return value; the URL was launched successfully
            // regardless of what happens here.
            ICStop(instance);
          } else {
            throw new IOException("Unable to launch URL: " + result);
          }
        } else {
          throw new IOException("Unable to create an Internet Config instance: " + result);
        }
        break;
      case MRJ_3_1 :
      case MRJ_COCOA :
        try {
          openURL.invoke(null, new Object[]{url});
        } catch (InvocationTargetException ite) {
          throw new IOException("InvocationTargetException while calling openURL: " + ite.getMessage());
        } catch (IllegalAccessException iae) {
          throw new IOException("IllegalAccessException while calling openURL: " + iae.getMessage());
        }
        break;
      case WINDOWS_NT :
      case WINDOWS_9x :
        // Add quotes around the URL to allow ampersands and other special
        // characters to work.
        String[] arguments;
        if (jvm == WINDOWS_9x) {
          arguments = new String[]{(String) browser, FIRST_WINDOWS_PARAMETER, SECOND_WINDOWS_PARAMETER, null};
        } else {
          arguments = new String[]{(String) browser, FIRST_WINDOWS_PARAMETER, SECOND_WINDOWS_PARAMETER, THIRD_WINDOWS_PARAMETER,
              null};
        }
        arguments[arguments.length - 1] = '"' + url + '"';
        Process process = Runtime.getRuntime().exec(arguments);
        // This avoids a memory leak on some versions of Java on Windows.
        // That's hinted at in
        // <http://developer.java.sun.com/developer/qow/archive/68/>.
        try {
          process.waitFor();
          process.exitValue();
        } catch (InterruptedException ie) {
          throw new IOException("InterruptedException while launching browser: " + ie.getMessage());
        }
        break;
      case OTHER :
        // Assume that we're on Unix and that Netscape is installed

        // Attempt to open the URL in a currently running session of Netscape
        process = Runtime.getRuntime().exec(
            new String[]{(String) browser, NETSCAPE_REMOTE_PARAMETER,
                NETSCAPE_OPEN_PARAMETER_START + url + NETSCAPE_OPEN_PARAMETER_END});
        try {
          int exitCode = process.waitFor();
          if (exitCode != 0) { // if Netscape was not open
            Runtime.getRuntime().exec(new String[]{(String) browser, url});
          }
        } catch (InterruptedException ie) {
          throw new IOException("InterruptedException while launching browser: " + ie.getMessage());
        }
        break;
      default :
        // This should never occur, but if it does, we'll try the simplest thing
        // possible
        Runtime.getRuntime().exec(new String[]{(String) browser, url});
        break;
    }
  }

  /**
   * Tries to read the BROWSER environment variable, which should be set to the
   * absolute path of the user's preferred web browser as proposed at
   * <http://tuxedo.org/~esr/BROWSER/>.
   *
   * @return The value of the BROWSER environment variable, or null if the
   *         variable does not exist or can't be read.
   */
  private static String getEnvironmentBrowser() {
    String browser = null;
    try {
      String[] echoParams = {"/bin/sh", "-c", "echo ${BROWSER:-netscape}"};
      Process echoProcess = Runtime.getRuntime().exec(echoParams);
      InputStream echoStream = echoProcess.getInputStream();
      BufferedReader echoReader = new BufferedReader(new InputStreamReader(echoStream));
      browser = echoReader.readLine();
      echoReader.close();
    } catch (Throwable t) {
      // If anything goes wrong, we'll return null.
    }
    return browser;
  }

  /**
   * Methods required for Mac OS X 10.0.x. The presence of native methods does
   * not cause any problems on other platforms.
   */
  private native static int ICStart(int[] instance, int signature);
  private native static int ICStop(int[] instance);
  private native static int ICLaunchURL(int instance, byte[] hint, byte[] data, int len, int[] selectionStart, int[] selectionEnd);
}