/* This java class is distributed under the BSD license. * * Copyright 2005 Lilian Chamontin. * contact lilian.chamontin at f r e e . f r */ /* * Portions Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * - Redistribution of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistribution in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of Sun Microsystems, Inc. or the names of * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * This software is provided "AS IS," without a warranty of any kind. ALL * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that this software is not designed or intended for use * in the design, construction, operation or maintenance of any nuclear * facility. */ package com.sun.opengl.utils; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Graphics; import java.awt.Label; import java.awt.Panel; import java.applet.Applet; import java.applet.AppletStub; import java.applet.AppletContext; import java.io.*; import java.net.*; import java.security.cert.*; import java.util.*; import java.util.jar.*; import javax.swing.*; import javax.media.opengl.*; /** Basic JOGL installer for Applets. The key functionality this class * supplies is the ability to deploy unsigned applets which use JOGL. * It may also be used to deploy signed applets in which case * multiple security dialogs will be displayed.
* * On the server side the codebase must contain jogl.jar and all of * the jogl-natives-*.jar files from the standard JOGL distribution. * This is the location from which the JOGL library used by the * applet is downloaded. The codebase additionally contains the jar * file of the user's potentially untrusted applet. The jogl.jar and * all jogl-natives jars must be signed by the same entity, which is * typically Sun Microsystems, Inc. * * Sample applet code: *
* <applet code="com.sun.opengl.utils.JOGLAppletInstaller" * width=600 * height=400 * codebase="/lib" * archive="jogl.jar,your_applet.jar"> * <param name="subapplet.classname" VALUE="untrusted.JOGLApplet"> * <param name="subapplet.displayname" VALUE="My JOGL Applet"> * <param name="progressbar" value="true"> * <param name="cache_archive" VALUE="jogl.jar,your_applet.jar"> * <param name="cache_archive_ex" VALUE="jogl.jar;preload,your_applet.jar;preload"> * </applet> **
* * There are some limitations with this approach. It is not possible * to specify e.g. -Dsun.java2d.noddraw=true or * -Dsun.java2d.opengl=true for better control over the Java2D * pipeline as it is with Java Web Start. There appear to be issues * with multiple JOGL-based applets on the same web page, though * multiple instances of the same applet appear to work. The latter * may simply be a bug which needs to be fixed.
* * The JOGL natives are cached in the user's home directory (the value * of the "user.home" system property in Java) under the directory * .jogl_ext. The Java Plug-In is responsible for performing all other * jar caching. If the JOGL installation is updated on the server, the * .jogl_ext cache will automatically be updated.
* * This technique requires that JOGL has not been installed in to the * JRE under e.g. jre/lib/ext. If problems are seen when deploying * this applet launcher, the first question to ask the end user is * whether jogl.jar and any associated DLLs, .so's, etc. are installed * directly in to the JRE. The applet launcher has been tested * primarily under Mozilla and Firefox; there may be problems when * running under, for example, Opera.
* * @author Lilian Chamontin * @author Kenneth Russell */ public class JOGLAppletLauncher extends Applet { static { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (Exception ignore) { } } // metadata for native libraries private static class NativeLibInfo { private String osName; private String osArch; private String nativeJar; private String nativePrefix; private String nativeSuffix; public NativeLibInfo(String osName, String osArch, String nativeJar, String nativePrefix, String nativeSuffix) { this.osName = osName; this.osArch = osArch; this.nativeJar = nativeJar; this.nativePrefix = nativePrefix; this.nativeSuffix = nativeSuffix; } public boolean matchesOSAndArch(String osName, String osArch) { if (osName.startsWith(this.osName)) { if ((this.osArch == null) || (osArch.startsWith(this.osArch))) { return true; } } return false; } public boolean matchesNativeLib(String nativeLibraryName) { if (nativeLibraryName.toLowerCase().endsWith(nativeSuffix)) { return true; } return false; } public String getNativeJarName() { return nativeJar; } public String getNativeLibName(String baseName) { return nativePrefix + baseName + nativeSuffix; } public boolean isMacOS() { return (osName.equals("mac")); } } private static final NativeLibInfo[] allNativeLibInfo = { new NativeLibInfo("win", null, "jogl-natives-win32.jar", "", ".dll"), new NativeLibInfo("mac", null, "jogl-natives-macosx.jar", "lib", ".jnilib"), new NativeLibInfo("linux", null, "jogl-natives-linux.jar", "lib", ".so"), new NativeLibInfo("sunos", "sparc", "jogl-natives-solsparc.jar", "lib", ".so"), new NativeLibInfo("sunos", "x86", "jogl-natives-solsparc.jar", "lib", ".so") }; private NativeLibInfo nativeLibInfo; // Library names computed once the jar comes down. // The signatures of these native libraries are checked before // installing them. private String[] nativeLibNames; /** The applet we have to start */ private Applet subApplet; private String subAppletClassName; // from applet PARAM private String subAppletDisplayName; // from applet PARAM /** URL string to an image used while installing */ private String subAppletImageName; // from applet PARAM private String installDirectory; // (defines a private directory for native libs) private JPanel loaderPanel = new JPanel(new BorderLayout()); private JProgressBar progressBar = new JProgressBar(0,100); private boolean isInitOk = false; /** false once start() has been invoked */ private boolean firstStart = true; /** true if start() has passed successfully */ private boolean joglStarted = false; public JOGLAppletLauncher() { } /** Applet initialization */ public void init() { this.subAppletClassName = getParameter("subapplet.classname"); if (subAppletClassName == null){ displayError("Init failed : Missing subapplet.classname argument"); return; } this.subAppletDisplayName = getParameter("subapplet.displayname"); if (subAppletDisplayName == null){ subAppletDisplayName = "Applet"; } this.subAppletImageName = getParameter("subapplet.image"); initLoaderLayout(); validate(); String codeBase = getCodeBase().toExternalForm().substring(7); // minus http:// this.installDirectory = codeBase.replace(':', '_') .replace('.', '_').replace('/', '_').replace('~','_'); // clean up the name String osName = System.getProperty("os.name").toLowerCase(); String osArch = System.getProperty("os.arch").toLowerCase(); if (checkOSAndArch(osName, osArch)) { this.isInitOk = true; } else { displayError("Init failed : Unsupported os / arch ( " + osName + " / " + osArch + " )"); } } private void displayMessage(String message){ progressBar.setString(message); } private void displayError(String errorMessage){ progressBar.setString("Error : " + errorMessage); } private void initLoaderLayout(){ setLayout(new BorderLayout()); progressBar.setBorderPainted(true); progressBar.setStringPainted(true); progressBar.setString("Loading..."); boolean includeImage = false; ImageIcon image = null; if (subAppletImageName != null){ try { image = new ImageIcon(new URL(subAppletImageName)); includeImage = true; } catch (MalformedURLException ex) { ex.printStackTrace(); // not blocking } } if (includeImage){ add(loaderPanel, BorderLayout.SOUTH); loaderPanel.add(new JLabel(image), BorderLayout.CENTER); loaderPanel.add(progressBar, BorderLayout.SOUTH); } else { add(loaderPanel, BorderLayout.SOUTH); loaderPanel.add(progressBar, BorderLayout.CENTER); } } /** start asynchroneous loading of libraries if needed */ public void start(){ if (isInitOk){ if (firstStart) { firstStart = false; String userHome = System.getProperty("user.home"); String installDirName = userHome + File.separator + ".jogl_ext" + File.separator + installDirectory + File.separator + Version.getVersion(); final File installDir = new File(installDirName); Thread refresher = new Thread() { public void run() { refreshJOGL(installDir); } }; refresher.setPriority(Thread.NORM_PRIORITY - 1); refresher.start(); } else if (joglStarted) { // we have to start again the applet (start can be called multiple times, // e.g once per tabbed browsing subApplet.start(); } } } public void stop(){ if (subApplet != null){ subApplet.stop(); } } public void destroy(){ if (subApplet != null){ subApplet.destroy(); } } private boolean checkOSAndArch(String osName, String osArch) { for (int i = 0; i < allNativeLibInfo.length; i++) { NativeLibInfo info = allNativeLibInfo[i]; if (info.matchesOSAndArch(osName, osArch)) { nativeLibInfo = info; return true; } } return false; } /** This method is executed from outside the Event Dispatch Thread, and installs * the required native libraries in the local folder. */ private void refreshJOGL(final File installDir) { try { Class subAppletClass = Class.forName(subAppletClassName); // this will block until the applet jar is downloaded } catch (ClassNotFoundException cnfe){ displayError("Start failed : class not found : " + subAppletClassName); return; } if (!installDir.exists()){ if (!installDir.mkdirs()) { displayError("Unable to create directories for target: " + installDir); return; } } String nativeJarName = nativeLibInfo.getNativeJarName(); URL nativeLibURL; URLConnection urlConnection; String path = getCodeBase().toExternalForm() + nativeJarName; try { nativeLibURL = new URL(path); urlConnection = nativeLibURL.openConnection(); } catch (Exception e){ e.printStackTrace(); displayError("Couldn't access the native lib URL : " + path); return; } // the timestamp used to determine if we have to download the native jar again // don't rely on the OS's timestamp to cache this long lastModified = getTimestamp(installDir, urlConnection.getLastModified()); if (lastModified != urlConnection.getLastModified()) { displayMessage("Updating local version of the native libraries"); // first download the full jar locally File localJarFile = new File(installDir, nativeJarName); try { saveNativesJarLocally(localJarFile, urlConnection); } catch (IOException ioe) { ioe.printStackTrace(); displayError("Unable to install the native file locally"); return; } try { JarFile jf = new JarFile(localJarFile); // Iterate the entries finding all candidate libraries that need // to have their signatures verified if (!findNativeEntries(jf)) { displayError("native libraries not found in jar file"); return; } byte[] buf = new byte[8192]; // Go back and verify the signatures for (int i = 0; i < nativeLibNames.length; i++) { JarEntry entry = jf.getJarEntry(nativeLibNames[i]); if (entry == null) { displayError("error looking up jar entry " + nativeLibNames[i]); return; } if (!checkNativeCertificates(jf, entry, buf)) { displayError("Native library " + nativeLibNames[i] + " isn't properly signed or has other errors"); return; } } // Now install the native library files progressBar.setValue(0); for (int i = 0; i < nativeLibNames.length; i++) { displayMessage("Installing native files"); if (!installFile(installDir, jf, nativeLibNames[i], buf)) { return; } int percent = (100 * (i + 1) / nativeLibNames.length); progressBar.setValue(percent); } // At this point we can delete the jar file we just downloaded jf.close(); localJarFile.delete(); // If installation succeeded, write a timestamp for all of the // files to be checked next time try { File timestampFile = new File(installDir, "timestamp"); timestampFile.delete(); BufferedWriter writer = new BufferedWriter(new FileWriter(timestampFile)); writer.write("" + urlConnection.getLastModified()); writer.flush(); writer.close(); } catch (Exception e) { displayError("Error writing time stamp for native libraries"); return; } } catch (Exception e) { displayError("Error opening jar file " + localJarFile.getName() + " for reading"); return; } } loadNativesAndStart(installDir); } public long getTimestamp(File installDir, long timestamp) { // Avoid returning valid value if timestamp file doesn't exist try { BufferedReader reader = new BufferedReader(new FileReader(new File(installDir, "timestamp"))); try { StreamTokenizer tokenizer = new StreamTokenizer(reader); // Avoid screwing up by not being able to read full longs tokenizer.resetSyntax(); tokenizer.wordChars('0', '9'); tokenizer.wordChars('-', '-'); tokenizer.nextToken(); String tok = tokenizer.sval; if (tok != null) { return Long.parseLong(tok); } } catch (Exception e) { } finally { reader.close(); } } catch (Exception e) { } return ((timestamp == 0) ? 1 : 0); } private void saveNativesJarLocally(File localJarFile, URLConnection urlConnection) throws IOException { BufferedOutputStream out = null;; InputStream in = null; displayMessage("Downloading native library"); progressBar.setValue(0); try { out = new BufferedOutputStream(new FileOutputStream(localJarFile)); int totalLength = urlConnection.getContentLength(); in = urlConnection.getInputStream(); byte[] buffer = new byte[1024]; int len; int sum = 0; while ( (len = in.read(buffer)) > 0) { out.write(buffer, 0, len); sum += len; int percent = (100 * sum / totalLength); progressBar.setValue(percent); } out.close(); in.close(); } finally { // close the files if (out != null) { try { out.close(); } catch (IOException ignore) { } } if (in != null) { try { in.close(); } catch (IOException ignore) { } } } } private boolean findNativeEntries(JarFile jf) { List list = new ArrayList(); Enumeration e = jf.entries(); while (e.hasMoreElements()) { JarEntry entry = (JarEntry) e.nextElement(); if (nativeLibInfo.matchesNativeLib(entry.getName())) { list.add(entry.getName()); } } if (list.isEmpty()) { return false; } nativeLibNames = (String[]) list.toArray(new String[0]); return true; } /** checking the native certificates with the jogl ones (all must match)*/ private boolean checkNativeCertificates(JarFile jar, JarEntry entry, byte[] buf){ // API states that we must read all of the data from the entry's // InputStream in order to be able to get its certificates try { InputStream is = jar.getInputStream(entry); int totalLength = (int) entry.getSize(); int len; while ((len = is.read(buf)) > 0) { } is.close(); Certificate[] nativeCerts = entry.getCertificates(); // locate the JOGL certificates Certificate[] joglCerts = GLDrawableFactory.class.getProtectionDomain(). getCodeSource().getCertificates(); if (nativeCerts == null || nativeCerts.length == 0) { return false; } int checked = 0; for (int i = 0; i < joglCerts.length; i++) { for (int j = 0; j < nativeCerts.length; j++) { if (nativeCerts[j].equals(joglCerts[i])){ checked++; break; } } } return (checked == joglCerts.length); } catch (Exception e) { return false; } } private boolean installFile(File installDir, JarFile jar, String fileName, byte[] buf) { try { JarEntry entry = jar.getJarEntry(fileName); if (entry == null) { displayError("Error finding native library " + fileName); return false; } InputStream is = jar.getInputStream(entry); int totalLength = (int) entry.getSize(); BufferedOutputStream out = null; File outputFile = new File(installDir, fileName); try { out = new BufferedOutputStream(new FileOutputStream(outputFile)); } catch (Exception e) { displayError("Error opening file " + fileName + " for writing"); return false; } int len; try { while ( (len = is.read(buf)) > 0) { out.write(buf, 0, len); } } catch (IOException ioe) { displayError("Error writing file " + fileName + " to disk"); ioe.printStackTrace(); outputFile.delete(); return false; } out.flush(); out.close(); return true; } catch (Exception e2) { e2.printStackTrace(); displayError("Error writing file " + fileName + " to disk"); return false; } } /** last step before launch : System.load() the natives and init()/start() the child applet */ private void loadNativesAndStart(final File nativeLibDir) { // back to the EDT SwingUtilities.invokeLater(new Runnable() { public void run() { displayMessage("Loading native libraries"); // Load core JOGL native library loadLibrary(nativeLibDir, "jogl"); if (!nativeLibInfo.isMacOS()) { // borrowed from NativeLibLoader // Must pre-load JAWT on all non-Mac platforms to // ensure references from jogl_awt shared object // will succeed since JAWT shared object isn't in // default library path try { System.loadLibrary("jawt"); } catch (UnsatisfiedLinkError ex) { // Accessibility technologies load JAWT themselves; safe to continue // as long as JAWT is loaded by any loader if (ex.getMessage().indexOf("already loaded") == -1) { displayError("Unable to load JAWT"); throw ex; } } } // Load AWT-specific native code loadLibrary(nativeLibDir, "jogl_awt"); // disable JOGL loading from elsewhere com.sun.opengl.impl.NativeLibLoader.disableLoading(); displayMessage("Starting applet " + subAppletDisplayName); // start the subapplet startSubApplet(); } }); } private void loadLibrary(File installDir, String libName) { String nativeLibName = nativeLibInfo.getNativeLibName(libName); try { System.load(new File(installDir, nativeLibName).getPath()); } catch (UnsatisfiedLinkError ex) { // should be safe to continue as long as the native is loaded by any loader if (ex.getMessage().indexOf("already loaded") == -1) { displayError("Unable to load " + nativeLibName); throw ex; } } } /** The true start of the sub applet (invoked in the EDT) */ private void startSubApplet(){ try { subApplet = (Applet)Class.forName(subAppletClassName).newInstance(); subApplet.setStub(new AppletStubProxy()); } catch (ClassNotFoundException cnfe) { cnfe.printStackTrace(); displayError("Class not found (" + subAppletClassName + ")"); return; } catch (Exception ex) { ex.printStackTrace(); displayError("Unable to start " + subAppletDisplayName); return; } add(subApplet, BorderLayout.CENTER); try { subApplet.init(); remove(loaderPanel); validate(); subApplet.start(); joglStarted = true; } catch (Exception ex){ ex.printStackTrace(); } } /** a proxy to allow the subApplet to work like a real applet */ class AppletStubProxy implements AppletStub { public boolean isActive() { return JOGLAppletLauncher.this.isActive(); } public URL getDocumentBase() { return JOGLAppletLauncher.this.getDocumentBase(); } public URL getCodeBase() { return JOGLAppletLauncher.this.getCodeBase(); } public String getParameter(String name) { return JOGLAppletLauncher.this.getParameter(name); } public AppletContext getAppletContext() { return JOGLAppletLauncher.this.getAppletContext(); } public void appletResize(int width, int height) { JOGLAppletLauncher.this.resize(width, height); } } }