📄 browserlauncher.java
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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});
getFileCreator = mrjFileUtilsClass.getDeclaredMethod("getFileCreator", new Class[]{File.class});
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;
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:
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;
}
/**
* 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;
}
// 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 = 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 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:
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 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:
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.
Process process = Runtime.getRuntime().exec(new String[]{(String)browser,
FIRST_WINDOWS_PARAMETER,
SECOND_WINDOWS_PARAMETER,
THIRD_WINDOWS_PARAMETER,
'"' + url + '"'});
// 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
// First, 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;
}
}
/**
* Methods required for Mac OS 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);
}
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