scriptbeforestartup.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   ScriptBeforeStartup.java

package org.gudy.azureus2.platform.unix;

import com.aelitis.azureus.core.impl.AzureusCoreSingleInstanceClient;
import java.io.*;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.gudy.azureus2.core3.config.COConfigurationManager;
import org.gudy.azureus2.core3.util.*;

public class ScriptBeforeStartup
{

	private static PrintStream sysout;
	private static Object display;

	public ScriptBeforeStartup()
	{
	}

	public static void main(String args[])
	{
		System.setProperty("transitory.startup", "1");
		sysout = System.out;
		try
		{
			System.setOut(new PrintStream(new FileOutputStream("/dev/stderr")));
		}
		catch (FileNotFoundException e) { }
		String mi_str = System.getProperty("MULTI_INSTANCE");
		boolean mi = mi_str != null && mi_str.equalsIgnoreCase("true");
		if (!mi)
		{
			boolean argsSent = (new AzureusCoreSingleInstanceClient()).sendArgs(args, 500);
			if (argsSent)
			{
				String msg = (new StringBuilder()).append("Passing startup args to already-running ").append(Constants.APP_NAME).append(" java process listening on [127.0.0.1: 6880]").toString();
				log(msg);
				sysout.println("exit");
				return;
			}
		}
		String scriptAfterShutdown = COConfigurationManager.getStringParameter("scriptaftershutdown", null);
		COConfigurationManager.removeParameter("scriptaftershutdown.exit");
		COConfigurationManager.removeParameter("scriptaftershutdown");
		COConfigurationManager.save();
		if (scriptAfterShutdown != null)
		{
			log((new StringBuilder()).append("Script after ").append(Constants.APP_NAME).append(" shutdown did not run.. running now").toString());
			sysout.println(scriptAfterShutdown);
			if (scriptAfterShutdown.indexOf("$0") < 0)
			{
				sysout.println("echo \"Restarting Azureus..\"");
				sysout.println("$0\n");
			}
			sysout.println("exit");
			return;
		}
		String moz = getNewGreDir();
		if (moz != null)
		{
			String s = (new StringBuilder()).append("export MOZILLA_FIVE_HOME=\"").append(moz).append("\"\n").append("if [ \"$LD_LIBRARY_PATH x\" = \" x\" ] ; then\n").append("\texport LD_LIBRARY_PATH=$MOZILLA_FIVE_HOME;\n").append("else\n").append("\texport LD_LIBRARY_PATH=$MOZILLA_FIVE_HOME:$LD_LIBRARY_PATH\n").append("fi\n").toString();
			sysout.println(s);
			log("setting LD_LIBRARY_PATH to: $LD_LIBRARY_PATH");
			log("setting MOZILLA_FIVE_HOME to: $MOZILLA_FIVE_HOME");
		} else
		{
			log("GRE/XULRunner automatically found");
		}
	}

	public static String getNewGreDir()
	{
		String grePath = null;
		String confList[] = {
			"/etc/gre64.conf", "/etc/gre.d/gre64.conf", "/etc/gre.conf", "/etc/gre.d/gre.conf", "/etc/gre.d/xulrunner.conf", "/etc/gre.d/libxul0d.conf"
		};
		if (canOpenBrowser())
			return null;
		log("Auto-scanning for GRE/XULRunner.  You can skip this by appending the GRE path to LD_LIBRARY_PATH and setting MOZILLA_FIVE_HOME.");
		try
		{
			Pattern pat = Pattern.compile("GRE_PATH=(.*)", 2);
			for (int i = 0; i < confList.length; i++)
			{
				File file = new File(confList[i]);
				if (!file.isFile() || !file.canRead())
					continue;
				log((new StringBuilder()).append("  checking ").append(file).append(" for GRE_PATH").toString());
				String fileText = FileUtil.readFileAsString(file, 16384);
				if (fileText == null)
					continue;
				Matcher matcher = pat.matcher(fileText);
				if (!matcher.find())
					continue;
				String possibleGrePath = matcher.group(1);
				if (!isValidGrePath(new File(possibleGrePath)))
					continue;
				grePath = possibleGrePath;
				break;
			}

			if (grePath == null)
			{
				ArrayList possibleDirs = new ArrayList();
				File libDir = new File("/usr");
				libDir.listFiles(new FileFilter(possibleDirs) {

					final ArrayList val$possibleDirs;

					public boolean accept(File pathname)
					{
						if (pathname.getName().startsWith("lib"))
							possibleDirs.add(pathname);
						return false;
					}

			
			{
				possibleDirs = arraylist;
				super();
			}
				});
				possibleDirs.add(new File("/usr/local"));
				possibleDirs.add(new File("/opt"));
				String possibleDirNames[] = {
					"mozilla", "firefox", "seamonkey", "xulrunner"
				};
				FileFilter ffIsPossibleDir = new FileFilter(possibleDirNames) {

					final String val$possibleDirNames[];

					public boolean accept(File pathname)
					{
						String name = pathname.getName().toLowerCase();
						for (int i = 0; i < possibleDirNames.length; i++)
							if (name.startsWith(possibleDirNames[i]))
								return true;

						return false;
					}

			
			{
				possibleDirNames = as;
				super();
			}
				};
				Iterator iter = possibleDirs.iterator();
				do
				{
					if (!iter.hasNext())
						break;
					File dir = (File)iter.next();
					File possibleFullDirs[] = dir.listFiles(ffIsPossibleDir);
					int i = 0;
					do
					{
						if (i >= possibleFullDirs.length)
							break;
						log((new StringBuilder()).append("  checking ").append(possibleFullDirs[i]).append(" for GRE").toString());
						if (isValidGrePath(possibleFullDirs[i]))
						{
							grePath = possibleFullDirs[i].getAbsolutePath();
							break;
						}
						i++;
					} while (true);
				} while (grePath == null);
			}
			if (grePath != null)
			{
				log((new StringBuilder()).append("GRE found at ").append(grePath).append(".").toString());
				System.setProperty("org.eclipse.swt.browser.XULRunnerPath", grePath);
			}
		}
		catch (Throwable t)
		{
			log((new StringBuilder()).append("Error trying to find suitable GRE: ").append(Debug.getNestedExceptionMessage(t)).toString());
			grePath = null;
		}
		if (!canOpenBrowser())
			log((new StringBuilder()).append("Can't create browser.  Will try to set LD_LIBRARY_PATH and hope ").append(Constants.APP_NAME).append("has better luck.").toString());
		return grePath;
	}

	private static boolean canOpenBrowser()
	{
		Class claDisplay = Class.forName("org.eclipse.swt.widgets.Display");
		if (display != null)
			display = claDisplay.newInstance();
		Class claShell = Class.forName("org.eclipse.swt.widgets.Shell");
		Constructor shellConstruct = claShell.getConstructor(new Class[] {
			claDisplay
		});
		Object shell = shellConstruct.newInstance(new Object[] {
			display
		});
		Class claBrowser = Class.forName("org.eclipse.swt.browser.Browser");
		Constructor constructors[] = claBrowser.getConstructors();
		int i = 0;
		do
		{
			if (i >= constructors.length)
				break;
			if (constructors[i].getParameterTypes().length == 2)
			{
				Object browser = constructors[i].newInstance(new Object[] {
					shell, new Integer(0)
				});
				Method methSetUrl = claBrowser.getMethod("setUrl", new Class[] {
					java/lang/String
				});
				methSetUrl.invoke(browser, new Object[] {
					"about:blank"
				});
				break;
			}
			i++;
		} while (true);
		Method methDisposeShell = claShell.getMethod("dispose", new Class[0]);
		methDisposeShell.invoke(shell, new Object[0]);
		return true;
		Throwable e;
		e;
		log((new StringBuilder()).append("Browser check failed with: ").append(Debug.getNestedExceptionMessage(e)).toString());
		return false;
	}

	private static boolean isValidGrePath(File dir)
	{
		if (!dir.isDirectory())
			return false;
		if ((new File(dir, "components/libwidget_gtk.so")).exists() || (new File(dir, "libwidget_gtk.so")).exists())
		{
			log((new StringBuilder()).append("\tCan not use GRE from ").append(dir).append(" as it's too old (GTK2 version required).").toString());
			return false;
		}
		if (!(new File(dir, "components/libwidget_gtk2.so")).exists() && !(new File(dir, "libwidget_gtk2.so")).exists())
		{
			log((new StringBuilder()).append("\tCan not use GRE from ").append(dir).append(" because it's missing components/libwidget_gtk2.so.").toString());
			return false;
		} else
		{
			return true;
		}
	}

	private static void log(String string)
	{
		sysout.println((new StringBuilder()).append("echo \"").append(string.replaceAll("\"", "\\\"")).append("\"").toString());
	}
}