LiteLoaderUpdateSite.java
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package com.mumfrey.liteloader.core;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import com.google.common.io.ByteSink;
import com.google.common.io.Files;
import com.mumfrey.liteloader.launch.ClassPathUtilities;
import com.mumfrey.liteloader.launch.LoaderProperties;
import com.mumfrey.liteloader.update.UpdateSite;
import com.mumfrey.liteloader.util.log.LiteLoaderLogger;
public class LiteLoaderUpdateSite extends UpdateSite
{
private static final String UPDATE_SITE_URL = "http://dl.liteloader.com/versions/";
private static final String UPDATE_SITE_VERSIONS_JSON = "versions.json";
private static final String UPDATE_SITE_ARTEFACT_NAME = "com.mumfrey:liteloader";
private String mcVersion;
private File mcDir;
private File jarFile = null;
private boolean updateForced = false;
public LiteLoaderUpdateSite(String targetVersion, long currentTimeStamp)
{
super(LiteLoaderUpdateSite.UPDATE_SITE_URL, LiteLoaderUpdateSite.UPDATE_SITE_VERSIONS_JSON, targetVersion, LiteLoaderUpdateSite.UPDATE_SITE_ARTEFACT_NAME, currentTimeStamp);
this.mcVersion = targetVersion;
}
public boolean canForceUpdate(LoaderProperties properties)
{
if (!properties.getAndStoreBooleanProperty(LoaderProperties.OPTION_FORCE_UPDATE, false))
{
return false;
}
if (this.hasJarFile()) return true;
return this.findJarFile();
}
/**
*
*/
private boolean findJarFile()
{
// Find the jar containing liteloader
File jarFile = ClassPathUtilities.getPathToResource(LiteLoader.class, "/" + LiteLoader.class.getName().replace('.', '/') + ".class");
if (!jarFile.isFile()) return false;
// Validate that the jar is in the expected name and location
this.mcDir = this.walkAndValidateParents(jarFile, "liteloader-" + this.mcVersion + ".jar", this.mcVersion, "liteloader", "mumfrey", "com", "libraries");
if (this.mcDir == null) return false;
// Check that the jar we found is actually on the current classpath
if (!ClassPathUtilities.isJarOnClassPath(jarFile)) return false;
this.jarFile = jarFile;
return true;
}
private File walkAndValidateParents(File file, String... breadcrumbs)
{
try
{
for (String breadcrumb : breadcrumbs)
{
if (file == null || !file.exists() || !file.getName().equals(breadcrumb)) return null;
file = file.getParentFile();
}
return file;
}
catch (Exception ex)
{
ex.printStackTrace();
}
return null;
}
public boolean canCheckForUpdate()
{
return !this.updateForced;
}
public boolean hasJarFile()
{
return this.jarFile != null;
}
public File getJarFile()
{
return this.jarFile;
}
public boolean forceUpdate()
{
if (this.jarFile != null)
{
LiteLoaderLogger.info("Attempting to force update, extracting jar assassin...");
File jarAssassinOutput = new File(this.jarFile.getParentFile(), "liteloader-update-agent.jar");
if (!LiteLoaderUpdateSite.extractFile("/update/liteloader-update-agent.jar", jarAssassinOutput) || !jarAssassinOutput.isFile())
{
LiteLoaderLogger.info("Couldn't extract jarassassin jar, can't force update");
return false;
}
File joptSimple = new File(this.mcDir, "libraries/net/sf/jopt-simple/jopt-simple/4.5/jopt-simple-4.5.jar");
ProcessBuilder jarAssassinProcBuilder = new ProcessBuilder(
LiteLoaderUpdateSite.getJavaExecutable().getAbsolutePath(),
"-cp", joptSimple.getAbsolutePath(),
"-jar", jarAssassinOutput.getAbsolutePath(),
"--jarFile", this.jarFile.getAbsolutePath()).directory(this.jarFile.getParentFile());
try
{
System.err.println(jarAssassinProcBuilder.command());
@SuppressWarnings("unused")
Process jarAssassin = jarAssassinProcBuilder.start();
ClassPathUtilities.deleteClassPathJar(this.jarFile.getAbsolutePath());
return true;
}
catch (Throwable th)
{
LiteLoaderLogger.info("Couldn't execute jarassassin jar, can't force update");
return false;
}
}
return false;
}
protected static boolean extractFile(String resourceName, File outputFile)
{
try
{
final InputStream inputStream = LiteLoaderUpdateSite.class.getResourceAsStream(resourceName);
final ByteSink outputSupplier = Files.asByteSink(outputFile);
outputSupplier.writeFrom(inputStream);
}
catch (NullPointerException ex)
{
return false;
}
catch (IOException ex)
{
return false;
}
return true;
}
protected static File getJavaExecutable()
{
File javaBin = new File(new File(System.getProperty("java.home")), "bin");
File javaWin = new File(javaBin, "javaw.exe");
String osName = System.getProperty("os.name").toLowerCase();
return osName.contains("win") && javaWin.isFile() ? javaWin : new File(javaBin, "java");
}
}