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authorBenjamin Culkin <scorpress@gmail.com>2024-05-19 17:56:33 -0400
committerBenjamin Culkin <scorpress@gmail.com>2024-05-19 17:56:33 -0400
commitaedc34d55462a75e329bbf342251ff6504cd117e (patch)
treebcc8f1f2352582717b484df302aeea6696b8f000 /projects/net.wotonomy.web/src/main/java/net/wotonomy/web/util
Initial import from SVN
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diff --git a/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/util/BrowserLauncher.java b/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/util/BrowserLauncher.java
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+++ b/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/util/BrowserLauncher.java
@@ -0,0 +1,665 @@
+//package edu.stanford.ejalbert;
+package net.wotonomy.web.util;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/** <p> BrowserLauncher is a class that provides one static method,
+ * openURL, which opens the default web browser for the current user
+ * of the system to the given URL. It may support other protocols
+ * depending on the system -- mailto, ftp, etc. -- but that has not
+ * been rigorously tested and is not guaranteed to work. </p>
+ *
+ * <p> Yes, this is platform-specific code, and yes, it may rely on
+ * classes on certain platforms that are not part of the standard JDK.
+ * What we're trying to do, though, is to take something that's
+ * frequently desirable but inherently platform-specific -- opening a
+ * default browser -- and allow programmers (you, for example) to do
+ * so without worrying about dropping into native code or doing
+ * anything else similarly evil. </p>
+ *
+ * <p> Anyway, this code is completely in Java and will run on all JDK
+ * 1.1-compliant systems without modification or a need for additional
+ * libraries. All classes that are required on certain platforms to
+ * allow this to run are dynamically loaded at runtime via reflection
+ * and, if not found, will not cause this to do anything other than
+ * returning an error when opening the browser. </p>
+ *
+ * <p> There are certain system requirements for this class, as it's
+ * running through Runtime.exec(), which is Java's way of making a
+ * native system call. Currently, this requires that a Macintosh have
+ * a Finder which supports the GURL event, which is true for Mac OS
+ * 8.0 and 8.1 systems that have the Internet Scripting AppleScript
+ * dictionary installed in the Scripting Additions folder in the
+ * Extensions folder (which is installed by default as far as I know
+ * under Mac OS 8.0 and 8.1), and for all Mac OS 8.5 and later
+ * systems. On Windows, it only runs under Win32 systems (Windows 95,
+ * 98, and NT 4.0, as well as later versions of all). On other
+ * systems, this drops back from the inherently platform-sensitive
+ * concept of a default browser and simply attempts to launch Netscape
+ * via a shell command. </p>
+ *
+ * <p> This code is Copyright 1999-2001 by Eric Albert
+ * (ejalbert@cs.stanford.edu) and may be redistributed or modified in
+ * any form without restrictions as long as the portion of this
+ * comment from this paragraph through the end of the comment is not
+ * removed. The author requests that he be notified of any
+ * application, applet, or other binary that makes use of this code,
+ * but that's more out of curiosity than anything and is not required.
+ * This software includes no warranty. The author is not repsonsible
+ * for any loss of data or functionality or any adverse or unexpected
+ * effects of using this software. </p>
+ *
+ * Credits: <br> Steven Spencer, JavaWorld magazine (<a
+ * href="http://www.javaworld.com/javaworld/javatips/jw-javatip66.html">Java
+ * Tip 66</a>) <br> Thanks also to Ron B. Yeh, Eric Shapiro, Ben
+ * Engber, Paul Teitlebaum, Andrea Cantatore, Larry Barowski, Trevor
+ * Bedzek, Frank Miedrich, and Ron Rabakukk
+ *
+ *
+ * original author Eric Albert (<a
+ * href="mailto:ejalbert@cs.stanford.edu">ejalbert@cs.stanford.edu</a>)
+ * author's version 1.4b1 (Released June 20, 2001)
+ * @author Copyright 2001, Intersect Software Corporation
+ * @version $Revision: 905 $ $Date: 2006-02-18 20:44:03 -0500 (Sat, 18 Feb 2006) $
+ */
+
+public class BrowserLauncher {
+ /** The Java virtual machine that we are running on. Actually, in
+ * most cases we only care about the operating system, but some
+ * operating systems require us to switch on the VM. */
+ private static int jvm;
+
+ /** The browser for the system */
+ private static Object browser;
+
+ /** Caches whether any classes, methods, and fields that are not
+ * part of the JDK and need to be dynamically loaded at runtime
+ * loaded successfully. <p> Note that if this is
+ * <code>false</code>, <code>openURL()</code> will always return
+ * an IOException. */
+ private static boolean loadedWithoutErrors;
+
+ /** The com.apple.mrj.MRJFileUtils class */
+ private static Class mrjFileUtilsClass;
+
+ /** The com.apple.mrj.MRJOSType class */
+ private static Class mrjOSTypeClass;
+
+ /** The com.apple.MacOS.AEDesc class */
+ private static Class aeDescClass;
+
+ /** The <init>(int) method of com.apple.MacOS.AETarget */
+ private static Constructor aeTargetConstructor;
+
+ /** The <init>(int, int, int) method of com.apple.MacOS.AppleEvent */
+ private static Constructor appleEventConstructor;
+
+ /** The <init>(String) method of com.apple.MacOS.AEDesc */
+ private static Constructor aeDescConstructor;
+
+ /** The findFolder method of com.apple.mrj.MRJFileUtils */
+ private static Method findFolder;
+
+ /** The getFileCreator method of com.apple.mrj.MRJFileUtils */
+ private static Method getFileCreator;
+
+ /** The getFileType method of com.apple.mrj.MRJFileUtils */
+ private static Method getFileType;
+
+ /** The openURL method of com.apple.mrj.MRJFileUtils */
+ private static Method openURL;
+
+ /** The makeOSType method of com.apple.MacOS.OSUtils */
+ private static Method makeOSType;
+
+ /** The putParameter method of com.apple.MacOS.AppleEvent */
+ private static Method putParameter;
+
+ /** The sendNoReply method of com.apple.MacOS.AppleEvent */
+ private static Method sendNoReply;
+
+ /** Actually an MRJOSType pointing to the System Folder on a Macintosh */
+ private static Object kSystemFolderType;
+
+ /** The keyDirectObject AppleEvent parameter type */
+ private static Integer keyDirectObject;
+
+ /** The kAutoGenerateReturnID AppleEvent code */
+ private static Integer kAutoGenerateReturnID;
+
+ /** The kAnyTransactionID AppleEvent code */
+ private static Integer kAnyTransactionID;
+
+ /** The linkage object required for JDirect 3 on Mac OS X. */
+ private static Object linkage;
+
+ /** The framework to reference on Mac OS X */
+ private static final String JDirect_MacOSX = "/System/Library/Frameworks/Carbon.framework/Frameworks/HIToolbox.framework/HIToolbox";
+
+ /** JVM constant for MRJ 2.0 */
+ private static final int MRJ_2_0 = 0;
+
+ /** JVM constant for MRJ 2.1 or later */
+ private static final int MRJ_2_1 = 1;
+
+ /** JVM constant for Java on Mac OS X 10.0 (MRJ 3.0) */
+ private static final int MRJ_3_0 = 3;
+
+ /** JVM constant for MRJ 3.1 */
+ private static final int MRJ_3_1 = 4;
+
+ /** JVM constant for any Windows NT JVM */
+ private static final int WINDOWS_NT = 5;
+
+ /** JVM constant for any Windows 9x JVM */
+ private static final int WINDOWS_9x = 6;
+
+ /** JVM constant for any other platform */
+ private static final int OTHER = -1;
+
+ /** The file type of the Finder on a Macintosh. Hardcoding
+ * "Finder" would keep non-U.S. English systems from working
+ * properly. */
+ private static final String FINDER_TYPE = "FNDR";
+
+ /** The creator code of the Finder on a Macintosh, which is needed
+ * to send AppleEvents to the application. */
+ private static final String FINDER_CREATOR = "MACS";
+
+ /** The name for the AppleEvent type corresponding to a GetURL event. */
+ private static final String GURL_EVENT = "GURL";
+
+ /** The first parameter that needs to be passed into
+ * Runtime.exec() to open the default web browser on Windows. */
+ private static final String FIRST_WINDOWS_PARAMETER = "/c";
+
+ /** The second parameter for Runtime.exec() on Windows. */
+ private static final String SECOND_WINDOWS_PARAMETER = "start";
+
+ /** The third parameter for Runtime.exec() on Windows. This is a
+ * "title" parameter that the command line expects. Setting this
+ * parameter allows URLs containing spaces to work. */
+ private static final String THIRD_WINDOWS_PARAMETER = "\"\"";
+
+ /** The shell parameters for Netscape that opens a given URL in an
+ * already-open copy of Netscape on many command-line systems. */
+ private static final String NETSCAPE_REMOTE_PARAMETER = "-remote";
+ //private static final String NETSCAPE_OPEN_PARAMETER_START = "'openURL(";
+ //private static final String NETSCAPE_OPEN_PARAMETER_END = ")'";
+ private static final String NETSCAPE_OPEN_PARAMETER_START = "openURL(";
+ private static final String NETSCAPE_OPEN_PARAMETER_END = ")";
+
+ /** The message from any exception thrown throughout the
+ * initialization process. */
+ private static String errorMessage;
+
+ /** An initialization block that determines the operating system
+ * and loads the necessary runtime data. */
+ static {
+ loadedWithoutErrors = true;
+ String osName = System.getProperty("os.name");
+ if (osName.startsWith("Mac OS")) {
+ String mrjVersion = System.getProperty("mrj.version");
+ String majorMRJVersion = mrjVersion.substring(0, 3);
+ try {
+ double version = Double.valueOf(majorMRJVersion).doubleValue();
+ if (version == 2) {
+ jvm = MRJ_2_0;
+ } else if (version >= 2.1 && version < 3) {
+ // Assume that all 2.x versions of MRJ work the
+ // same. MRJ 2.1 actually works via
+ // Runtime.exec() and 2.2 supports that but has an
+ // openURL() method as well that we currently
+ // ignore.
+ jvm = MRJ_2_1;
+ } else if (version == 3.0) {
+ jvm = MRJ_3_0;
+ } else if (version >= 3.1) {
+ // Assume that all 3.1 and later versions of MRJ
+ // work the same.
+ jvm = MRJ_3_1;
+ } else {
+ loadedWithoutErrors = false;
+ errorMessage = "Unsupported MRJ version: " + version;
+ }
+ } catch (NumberFormatException nfe) {
+ loadedWithoutErrors = false;
+ errorMessage = "Invalid MRJ version: " + mrjVersion;
+ }
+ } else if (osName.startsWith("Windows")) {
+ if (osName.indexOf("9") != -1) {
+ jvm = WINDOWS_9x;
+ } else {
+ jvm = WINDOWS_NT;
+ }
+ } else {
+ jvm = OTHER;
+ }
+
+ if (loadedWithoutErrors) { // if we haven't hit any errors yet
+ loadedWithoutErrors = loadClasses();
+ }
+ }
+
+ /** This class should be never be instantiated; this just ensures so. */
+ private BrowserLauncher() { }
+
+ /** Called by a static initializer to load any classes, fields,
+ * and methods required at runtime to locate the user's web
+ * browser.
+ * @return <code>true</code> if all intialization succeeded
+ * <code>false</code> if any portion of the initialization failed */
+ private static boolean loadClasses() {
+ switch (jvm) {
+ case MRJ_2_0:
+ 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;
+ }
+ 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) {
+ //WTF? 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:
+ // 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 WINDOWS_9x:
+ // Add quotes around the URL to allow ampersands and other special
+ // characters to work.
+ // Note: windows 98 doesn't expect the THIRD_WINDOWS_PARAMETER for
+ // its title.
+ process = Runtime.getRuntime().exec(new String[]
+ { (String) browser, FIRST_WINDOWS_PARAMETER,
+ SECOND_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 the command had an error
+ Runtime.getRuntime().exec(new String[]
+ { (String) browser, url } );
+ } else if(process.getErrorStream() != null) {
+ // Netscape may not be open, so the command may not have an
+ // error, it just wouldn't have a process to attach to...
+ BufferedReader reader = new BufferedReader
+ (new InputStreamReader(process.getErrorStream()));
+ String errorStr = reader.readLine();
+
+ if ( errorStr != null ) {
+ // Command failed, start up the browser
+ process = 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);
+}
+