browserlauncher.java.svn-base

来自「开源项目openfire的完整源程序」· SVN-BASE 代码 · 共 550 行 · 第 1/2 页

        switch (jvm) {
            case MRJ_2_0:
                try {
                    Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
                    macOSErrorClass = Class.forName("com.apple.MacOS.MacOSError");
                    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;
                }
                break;
            case MRJ_2_1:
                try {
                    mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
                    mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
                    Field systemFolderField = mrjFileUtilsClass.getDeclaredField("kSystemFolderType");
                    kSystemFolderType = systemFolderField.get(null);
                    findFolder = mrjFileUtilsClass.getDeclaredMethod("findFolder", new Class[]{mrjOSTypeClass});
                    getFileType = mrjFileUtilsClass.getDeclaredMethod("getFileType", new Class[]{File.class});
                }
                catch (ClassNotFoundException cnfe) {
                    errorMessage = cnfe.getMessage();
                    return false;
                }
                catch (NoSuchFieldException nsfe) {
                    errorMessage = nsfe.getMessage();
                    return false;
                }
                catch (NoSuchMethodException nsme) {
                    errorMessage = nsme.getMessage();
                    return false;
                }
                catch (SecurityException se) {
                    errorMessage = se.getMessage();
                    return false;
                }
                catch (IllegalAccessException iae) {
                    errorMessage = iae.getMessage();
                    return false;
                }
                break;
        }
        return true;
    }

    /**
     * Attempts to locate the default web browser on the local system.  Caches results 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;
                        }
                        Object fileType = getFileType.invoke(null, new Object[]{file});
                        if (FINDER_TYPE.equals(fileType.toString())) {
                            browser = file.toString();    // Actually the Finder, but that's OK
                            return browser;
                        }
                    }
                    catch (IllegalArgumentException iare) {
                        browser = browser;
                        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 WINDOWS:
                browser = "rundll32.exe";
                break;
            case OTHER:
            default:
                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);
        }
        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 WINDOWS:
                Runtime.getRuntime().exec(new String[]{(String)browser, WINDOWS_PARAMETER, url});
                break;
            case OS_X:
                BrowserLauncher.launchForOSX(url);
                break;
            case OTHER:
                // Assume that we're on Unix and that Netscape is installed

                // First, attempt to open the URL in a currently running session of Netscape
                Process process = Runtime.getRuntime().exec((String)browser +
                        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;
        }
    }

    /**
     * THERE HAS GOT TO BE A BETTER WAY TO DO THIS -- email out to mailing
     * lists; waiting for reply.
     */
    static protected void launchForOSX(String url)
            throws IOException {
        String run = "open " + url;
        Process process = Runtime.getRuntime().exec(run);

        try {
            int exitCode = process.waitFor();

            if (exitCode != 0) { // failed :-(
                System.out.println("browser launch failed - exit code: "
                        + exitCode);
            }
        }
        catch (InterruptedException ie) {
            throw new IOException("Exception while launching browser: "
                    + ie.getMessage());
        }
    }

}