/* * Copyright (c) 1999, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.applet; import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.lang.reflect.Method;import java.lang.reflect.InvocationTargetException;import java.net.URL;import java.net.MalformedURLException;import java.util.Enumeration;import java.util.Properties;import java.util.Vector;import sun.net.www.ParseUtil; /** * The main entry point into AppletViewer. */public class Main {    /**     * The file which contains all of the AppletViewer specific properties.     */    static File theUserPropertiesFile;     /**     * The default key/value pairs for the required user-specific properties.     */    static final String [][] avDefaultUserProps = {        // There's a bootstrapping problem here.  If we don't have a proxyHost,        // then we will not be able to connect to a URL outside the firewall;        // however, there's no way for us to set the proxyHost without starting        // AppletViewer.  This problem existed before the re-write.        {"http.proxyHost", ""},        {"http.proxyPort", "80"},        {"package.restrict.access.sun", "true"}    };     static {        File userHome = new File(System.getProperty("user.home"));        // make sure we can write to this location        userHome.canWrite();         theUserPropertiesFile = new File(userHome, ".appletviewer");    }     // i18n    private static AppletMessageHandler amh = new AppletMessageHandler("appletviewer");     /**     * Member variables set according to options passed in to AppletViewer.     */    private boolean debugFlag = false;    private boolean helpFlag  = false;    private String  encoding  = null;    private boolean noSecurityFlag  = false;    private static boolean cmdLineTestFlag = false;     /**     * The list of valid URLs passed in to AppletViewer.     */    private static Vector urlList = new Vector(1);     // This is used in init().  Getting rid of this is desirable but depends    // on whether the property that uses it is necessary/standard.    public static final String theVersion = System.getProperty("java.version");     /**     * The main entry point into AppletViewer.     */    public static void main(String [] args) {        Main m = new Main();        int ret = m.run(args);         // Exit immediately if we got some sort of error along the way.        // For debugging purposes, if we have passed in "-XcmdLineTest" we        // force a premature exit.        if ((ret != 0) || (cmdLineTestFlag))            System.exit(ret);    }     private int run(String [] args) {        // DECODE ARGS        try {            if (args.length == 0) {                usage();                return 0;            }            for (int i = 0; i < args.length; ) {                int j = decodeArg(args, i);                if (j == 0) {                    throw new ParseException(lookup("main.err.unrecognizedarg",                                                    args[i]));                }                i += j;            }        } catch (ParseException e) {            System.err.println(e.getMessage());            return 1;        }         // CHECK ARGUMENTS        if (helpFlag) {            usage();            return 0;        }         if (urlList.size() == 0) {            System.err.println(lookup("main.err.inputfile"));            return 1;        }         if (debugFlag) {            // START A DEBUG SESSION            // Given the current architecture, we will end up decoding the            // arguments again, but at least we are guaranteed to have            // arguments which are valid.            return invokeDebugger(args);        }         // INSTALL THE SECURITY MANAGER (if necessary)        if (!noSecurityFlag && (System.getSecurityManager() == null))            init();         // LAUNCH APPLETVIEWER FOR EACH URL        for (int i = 0; i < urlList.size(); i++) {            try {                // XXX 5/17 this parsing method should be changed/fixed so that                // it doesn't do both parsing of the html file and launching of                // the AppletPanel                AppletViewer.parse((URL) urlList.elementAt(i), encoding);            } catch (IOException e) {                System.err.println(lookup("main.err.io", e.getMessage()));                return 1;            }        }        return 0;    }     private static void usage() {        System.out.println(lookup("usage"));    }     /**     * Decode a single argument in an array and return the number of elements     * used.     *     * @param args The array of arguments.     * @param i    The argument to decode.     * @return     The number of array elements used when the argument was     *             decoded.     * @exception ParseException     *             Thrown when there is a problem with something in the     *             argument array.     */    private int decodeArg(String [] args, int i) throws ParseException {        String arg = args[i];        int argc = args.length;         if ("-help".equalsIgnoreCase(arg) || "-?".equals(arg)) {            helpFlag = true;            return 1;        } else if ("-encoding".equals(arg) && (i < argc - 1)) {            if (encoding != null)                throw new ParseException(lookup("main.err.dupoption", arg));            encoding = args[++i];            return 2;        } else if ("-debug".equals(arg)) {            debugFlag = true;            return 1;        } else if ("-Xnosecurity".equals(arg)) {            // This is an undocumented (and, in the future, unsupported)            // flag which prevents AppletViewer from installing its own            // SecurityManager.             System.err.println();            System.err.println(lookup("main.warn.nosecmgr"));            System.err.println();             noSecurityFlag = true;            return 1;        } else if ("-XcmdLineTest".equals(arg)) {            // This is an internal flag which should be used for command-line            // testing.  It instructs AppletViewer to force a premature exit            // immediately after the applet has been launched.            cmdLineTestFlag = true;            return 1;        } else if (arg.startsWith("-")) {            throw new ParseException(lookup("main.err.unsupportedopt", arg));        } else {            // we found what we hope is a url            URL url = parseURL(arg);            if (url != null) {                urlList.addElement(url);                return 1;            }        }        return 0;    }     /**     * Following the relevant RFC, construct a valid URL based on the passed in     * string.     *     * @param url  a string which represents either a relative or absolute URL.     * @return     a URL when the passed in string can be interpreted according     *             to the RFC, <code>null</code> otherwise.     * @exception  ParseException     *             Thrown when we are unable to construct a proper URL from the     *             passed in string.     */    private URL parseURL(String url) throws ParseException {        URL u = null;        // prefix of the urls with 'file' scheme        String prefix = "file:";         try {            if (url.indexOf(':') <= 1)            {                // appletviewer accepts only unencoded filesystem paths                u = ParseUtil.fileToEncodedURL(new File(url));            } else if (url.startsWith(prefix) &&                       url.length() != prefix.length() &&                       !(new File(url.substring(prefix.length())).isAbsolute()))            {                // relative file URL, like this "file:index.html"                // ensure that this file URL is absolute                // ParseUtil.fileToEncodedURL should be done last (see 6329251)                String path = ParseUtil.fileToEncodedURL(new File(System.getProperty("user.dir"))).getPath() +                    url.substring(prefix.length());                u = new URL("file", "", path);            } else {                // appletviewer accepts only encoded urls                u = new URL(url);            }        } catch (MalformedURLException e) {            throw new ParseException(lookup("main.err.badurl",                                            url, e.getMessage()));        }         return u;    }     /**     * Invoke the debugger with the arguments passed in to appletviewer.     *     * @param args The arguments passed into the debugger.     * @return     <code>0</code> if the debugger is invoked successfully,     *             <code>1</code> otherwise.     */    private int invokeDebugger(String [] args) {        // CONSTRUCT THE COMMAND LINE        String [] newArgs = new String[args.length + 1];        int current = 0;         // Add a -classpath argument that prevents        // the debugger from launching appletviewer with the default of        // ".". appletviewer's classpath should never contain valid        // classes since they will result in security exceptions.        // Ideally, the classpath should be set to "", but the VM won't        // allow an empty classpath, so a phony directory name is used.        String phonyDir = System.getProperty("java.home") +                          File.separator + "phony";        newArgs[current++] = "-Djava.class.path=" + phonyDir;         // Appletviewer's main class is the debuggee        newArgs[current++] = "sun.applet.Main";         // Append all the of the original appletviewer arguments,        // leaving out the "-debug" option.        for (int i = 0; i < args.length; i++) {            if (!("-debug".equals(args[i]))) {                newArgs[current++] = args[i];            }        }         // LAUNCH THE DEBUGGER        // Reflection is used for two reasons:        // 1) The debugger classes are on classpath and thus must be loaded        // by the application class loader. (Currently, appletviewer are        // loaded through the boot class path out of rt.jar.)        // 2) Reflection removes any build dependency between appletviewer        // and jdb.        try {            Class c = Class.forName("com.sun.tools.example.debug.tty.TTY", true,                                    ClassLoader.getSystemClassLoader());            Method m = c.getDeclaredMethod("main",                                           new Class[] { String[].class });            m.invoke(null, new Object[] { newArgs });        } catch (ClassNotFoundException cnfe) {            System.err.println(lookup("main.debug.cantfinddebug"));            return 1;        } catch (NoSuchMethodException nsme) {            System.err.println(lookup("main.debug.cantfindmain"));            return 1;        } catch (InvocationTargetException ite) {            System.err.println(lookup("main.debug.exceptionindebug"));            return 1;        } catch (IllegalAccessException iae) {            System.err.println(lookup("main.debug.cantaccess"));            return 1;        }        return 0;    }     private void init() {        // GET APPLETVIEWER USER-SPECIFIC PROPERTIES        Properties avProps = getAVProps();         // ADD OTHER RANDOM PROPERTIES        // XXX 5/18 need to revisit why these are here, is there some        // standard for what is available?         // Standard browser properties        avProps.put("browser", "sun.applet.AppletViewer");        avProps.put("browser.version", "1.06");        avProps.put("browser.vendor", "Oracle Corporation");        avProps.put("http.agent", "Java(tm) 2 SDK, Standard Edition v" + theVersion);         // Define which packages can be extended by applets        // XXX 5/19 probably not needed, not checked in AppletSecurity        avProps.put("package.restrict.definition.java", "true");        avProps.put("package.restrict.definition.sun", "true");         // Define which properties can be read by applets.        // A property named by "key" can be read only when its twin        // property "key.applet" is true.  The following ten properties        // are open by default.  Any other property can be explicitly        // opened up by the browser user by calling appletviewer with        // -J-Dkey.applet=true        avProps.put("java.version.applet", "true");        avProps.put("java.vendor.applet", "true");        avProps.put("java.vendor.url.applet", "true");        avProps.put("java.class.version.applet", "true");        avProps.put("os.name.applet", "true");        avProps.put("os.version.applet", "true");        avProps.put("os.arch.applet", "true");        avProps.put("file.separator.applet", "true");        avProps.put("path.separator.applet", "true");        avProps.put("line.separator.applet", "true");         // Read in the System properties.  If something is going to be        // over-written, warn about it.        Properties sysProps = System.getProperties();        for (Enumeration e = sysProps.propertyNames(); e.hasMoreElements(); ) {            String key = (String) e.nextElement();            String val = (String) sysProps.getProperty(key);            String oldVal;            if ((oldVal = (String) avProps.setProperty(key, val)) != null)                System.err.println(lookup("main.warn.prop.overwrite", key,                                          oldVal, val));        }         // INSTALL THE PROPERTY LIST        System.setProperties(avProps);         // Create and install the security manager        if (!noSecurityFlag) {            System.setSecurityManager(new AppletSecurity());        } else {            System.err.println(lookup("main.nosecmgr"));        }         // REMIND: Create and install a socket factory!    }     /**     * Read the AppletViewer user-specific properties.  Typically, these     * properties should reside in the file $USER/.appletviewer.  If this file     * does not exist, one will be created.  Information for this file will     * be gleaned from $USER/.hotjava/properties.  If that file does not exist,     * then default values will be used.     *     * @return     A Properties object containing all of the AppletViewer     *             user-specific properties.     */    private Properties getAVProps() {        Properties avProps = new Properties();         File dotAV = theUserPropertiesFile;        if (dotAV.exists()) {            // we must have already done the conversion            if (dotAV.canRead()) {                // just read the file                avProps = getAVProps(dotAV);            } else {                // send out warning and use defaults                System.err.println(lookup("main.warn.cantreadprops",                                          dotAV.toString()));                avProps = setDefaultAVProps();            }        } else {            // create the $USER/.appletviewer file             // see if $USER/.hotjava/properties exists            File userHome = new File(System.getProperty("user.home"));            File dotHJ = new File(userHome, ".hotjava");            dotHJ = new File(dotHJ, "properties");            if (dotHJ.exists()) {                // just read the file                avProps = getAVProps(dotHJ);            } else {                // send out warning and use defaults                System.err.println(lookup("main.warn.cantreadprops",                                          dotHJ.toString()));                avProps = setDefaultAVProps();            }             // SAVE THE FILE            try {                FileOutputStream out = new FileOutputStream(dotAV);                avProps.store(out, lookup("main.prop.store"));                out.close();            } catch (IOException e) {                System.err.println(lookup("main.err.prop.cantsave",                                          dotAV.toString()));            }        }        return avProps;    }     /**     * Set the AppletViewer user-specific properties to be the default values.     *     * @return     A Properties object containing all of the AppletViewer     *             user-specific properties, set to the default values.     */    private Properties setDefaultAVProps() {        Properties avProps = new Properties();        for (int i = 0; i < avDefaultUserProps.length; i++) {            avProps.setProperty(avDefaultUserProps[i][0],                                avDefaultUserProps[i][1]);        }        return avProps;    }     /**     * Given a file, find only the properties that are setable by AppletViewer.     *     * @param inFile A Properties file from which we select the properties of     *             interest.     * @return     A Properties object containing all of the AppletViewer     *             user-specific properties.     */    private Properties getAVProps(File inFile) {        Properties avProps  = new Properties();         // read the file        Properties tmpProps = new Properties();        try {            FileInputStream in = new FileInputStream(inFile);            tmpProps.load(new BufferedInputStream(in));            in.close();        } catch (IOException e) {            System.err.println(lookup("main.err.prop.cantread",                                      inFile.toString()));        }         // pick off the properties we care about        for (int i = 0; i < avDefaultUserProps.length; i++) {            String value = tmpProps.getProperty(avDefaultUserProps[i][0]);            if (value != null) {                // the property exists in the file, so replace the default                avProps.setProperty(avDefaultUserProps[i][0], value);            } else {                // just use the default                avProps.setProperty(avDefaultUserProps[i][0],                                    avDefaultUserProps[i][1]);            }        }        return avProps;    }     /**     * Methods for easier i18n handling.

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