| /* |
| * Copyright (c) 1997, 2017, 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 jdk.internal.loader; |
| |
| import java.io.Closeable; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.HttpURLConnection; |
| import java.net.JarURLConnection; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.net.URLStreamHandler; |
| import java.net.URLStreamHandlerFactory; |
| import java.security.AccessControlContext; |
| import java.security.AccessControlException; |
| import java.security.AccessController; |
| import java.security.CodeSigner; |
| import java.security.Permission; |
| import java.security.PrivilegedExceptionAction; |
| import java.security.cert.Certificate; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| import java.util.Properties; |
| import java.util.Set; |
| import java.util.Stack; |
| import java.util.StringTokenizer; |
| import java.util.jar.JarFile; |
| import java.util.zip.ZipEntry; |
| import java.util.jar.JarEntry; |
| import java.util.jar.Manifest; |
| import java.util.jar.Attributes; |
| import java.util.jar.Attributes.Name; |
| import java.util.zip.ZipFile; |
| |
| import jdk.internal.misc.JavaNetURLAccess; |
| import jdk.internal.misc.JavaNetURLClassLoaderAccess; |
| import jdk.internal.misc.JavaUtilZipFileAccess; |
| import jdk.internal.misc.SharedSecrets; |
| import jdk.internal.util.jar.InvalidJarIndexError; |
| import jdk.internal.util.jar.JarIndex; |
| import sun.net.util.URLUtil; |
| import sun.net.www.ParseUtil; |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * This class is used to maintain a search path of URLs for loading classes |
| * and resources from both JAR files and directories. |
| * |
| * @author David Connelly |
| */ |
| public class URLClassPath { |
| private static final String USER_AGENT_JAVA_VERSION = "UA-Java-Version"; |
| private static final String JAVA_VERSION; |
| private static final boolean DEBUG; |
| private static final boolean DISABLE_JAR_CHECKING; |
| private static final boolean DISABLE_ACC_CHECKING; |
| |
| static { |
| Properties props = GetPropertyAction.privilegedGetProperties(); |
| JAVA_VERSION = props.getProperty("java.version"); |
| DEBUG = (props.getProperty("sun.misc.URLClassPath.debug") != null); |
| String p = props.getProperty("sun.misc.URLClassPath.disableJarChecking"); |
| DISABLE_JAR_CHECKING = p != null ? p.equals("true") || p.equals("") : false; |
| |
| p = props.getProperty("jdk.net.URLClassPath.disableRestrictedPermissions"); |
| DISABLE_ACC_CHECKING = p != null ? p.equals("true") || p.equals("") : false; |
| } |
| |
| /* The original search path of URLs. */ |
| private ArrayList<URL> path = new ArrayList<>(); |
| |
| /* The stack of unopened URLs */ |
| Stack<URL> urls = new Stack<>(); |
| |
| /* The resulting search path of Loaders */ |
| ArrayList<Loader> loaders = new ArrayList<>(); |
| |
| /* Map of each URL opened to its corresponding Loader */ |
| HashMap<String, Loader> lmap = new HashMap<>(); |
| |
| /* The jar protocol handler to use when creating new URLs */ |
| private URLStreamHandler jarHandler; |
| |
| /* Whether this URLClassLoader has been closed yet */ |
| private boolean closed = false; |
| |
| /* The context to be used when loading classes and resources. If non-null |
| * this is the context that was captured during the creation of the |
| * URLClassLoader. null implies no additional security restrictions. */ |
| private final AccessControlContext acc; |
| |
| /** |
| * Creates a new URLClassPath for the given URLs. The URLs will be |
| * searched in the order specified for classes and resources. A URL |
| * ending with a '/' is assumed to refer to a directory. Otherwise, |
| * the URL is assumed to refer to a JAR file. |
| * |
| * @param urls the directory and JAR file URLs to search for classes |
| * and resources |
| * @param factory the URLStreamHandlerFactory to use when creating new URLs |
| * @param acc the context to be used when loading classes and resources, may |
| * be null |
| */ |
| public URLClassPath(URL[] urls, |
| URLStreamHandlerFactory factory, |
| AccessControlContext acc) { |
| for (int i = 0; i < urls.length; i++) { |
| path.add(urls[i]); |
| } |
| push(urls); |
| if (factory != null) { |
| jarHandler = factory.createURLStreamHandler("jar"); |
| } |
| if (DISABLE_ACC_CHECKING) |
| this.acc = null; |
| else |
| this.acc = acc; |
| } |
| |
| /** |
| * Constructs a URLClassPath with no additional security restrictions. |
| * Used by code that implements the class path. |
| */ |
| public URLClassPath(URL[] urls) { |
| this(urls, null, null); |
| } |
| |
| public URLClassPath(URL[] urls, AccessControlContext acc) { |
| this(urls, null, acc); |
| } |
| |
| public synchronized List<IOException> closeLoaders() { |
| if (closed) { |
| return Collections.emptyList(); |
| } |
| List<IOException> result = new LinkedList<>(); |
| for (Loader loader : loaders) { |
| try { |
| loader.close(); |
| } catch (IOException e) { |
| result.add (e); |
| } |
| } |
| closed = true; |
| return result; |
| } |
| |
| /** |
| * Appends the specified URL to the search path of directory and JAR |
| * file URLs from which to load classes and resources. |
| * <p> |
| * If the URL specified is null or is already in the list of |
| * URLs, then invoking this method has no effect. |
| */ |
| public synchronized void addURL(URL url) { |
| if (closed) |
| return; |
| synchronized (urls) { |
| if (url == null || path.contains(url)) |
| return; |
| |
| urls.add(0, url); |
| path.add(url); |
| } |
| } |
| |
| /** |
| * Returns the original search path of URLs. |
| */ |
| public URL[] getURLs() { |
| synchronized (urls) { |
| return path.toArray(new URL[path.size()]); |
| } |
| } |
| |
| /** |
| * Finds the resource with the specified name on the URL search path |
| * or null if not found or security check fails. |
| * |
| * @param name the name of the resource |
| * @param check whether to perform a security check |
| * @return a <code>URL</code> for the resource, or <code>null</code> |
| * if the resource could not be found. |
| */ |
| public URL findResource(String name, boolean check) { |
| Loader loader; |
| for (int i = 0; (loader = getLoader(i)) != null; i++) { |
| URL url = loader.findResource(name, check); |
| if (url != null) { |
| return url; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Finds the first Resource on the URL search path which has the specified |
| * name. Returns null if no Resource could be found. |
| * |
| * @param name the name of the Resource |
| * @param check whether to perform a security check |
| * @return the Resource, or null if not found |
| */ |
| public Resource getResource(String name, boolean check) { |
| if (DEBUG) { |
| System.err.println("URLClassPath.getResource(\"" + name + "\")"); |
| } |
| |
| Loader loader; |
| for (int i = 0; (loader = getLoader(i)) != null; i++) { |
| Resource res = loader.getResource(name, check); |
| if (res != null) { |
| return res; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Finds all resources on the URL search path with the given name. |
| * Returns an enumeration of the URL objects. |
| * |
| * @param name the resource name |
| * @return an Enumeration of all the urls having the specified name |
| */ |
| public Enumeration<URL> findResources(final String name, |
| final boolean check) { |
| return new Enumeration<>() { |
| private int index = 0; |
| private URL url = null; |
| |
| private boolean next() { |
| if (url != null) { |
| return true; |
| } else { |
| Loader loader; |
| while ((loader = getLoader(index++)) != null) { |
| url = loader.findResource(name, check); |
| if (url != null) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |
| |
| public boolean hasMoreElements() { |
| return next(); |
| } |
| |
| public URL nextElement() { |
| if (!next()) { |
| throw new NoSuchElementException(); |
| } |
| URL u = url; |
| url = null; |
| return u; |
| } |
| }; |
| } |
| |
| public Resource getResource(String name) { |
| return getResource(name, true); |
| } |
| |
| /** |
| * Finds all resources on the URL search path with the given name. |
| * Returns an enumeration of the Resource objects. |
| * |
| * @param name the resource name |
| * @return an Enumeration of all the resources having the specified name |
| */ |
| public Enumeration<Resource> getResources(final String name, |
| final boolean check) { |
| return new Enumeration<>() { |
| private int index = 0; |
| private Resource res = null; |
| |
| private boolean next() { |
| if (res != null) { |
| return true; |
| } else { |
| Loader loader; |
| while ((loader = getLoader(index++)) != null) { |
| res = loader.getResource(name, check); |
| if (res != null) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |
| |
| public boolean hasMoreElements() { |
| return next(); |
| } |
| |
| public Resource nextElement() { |
| if (!next()) { |
| throw new NoSuchElementException(); |
| } |
| Resource r = res; |
| res = null; |
| return r; |
| } |
| }; |
| } |
| |
| public Enumeration<Resource> getResources(final String name) { |
| return getResources(name, true); |
| } |
| |
| /* |
| * Returns the Loader at the specified position in the URL search |
| * path. The URLs are opened and expanded as needed. Returns null |
| * if the specified index is out of range. |
| */ |
| private synchronized Loader getLoader(int index) { |
| if (closed) { |
| return null; |
| } |
| // Expand URL search path until the request can be satisfied |
| // or the URL stack is empty. |
| while (loaders.size() < index + 1) { |
| // Pop the next URL from the URL stack |
| URL url; |
| synchronized (urls) { |
| if (urls.empty()) { |
| return null; |
| } else { |
| url = urls.pop(); |
| } |
| } |
| // Skip this URL if it already has a Loader. (Loader |
| // may be null in the case where URL has not been opened |
| // but is referenced by a JAR index.) |
| String urlNoFragString = URLUtil.urlNoFragString(url); |
| if (lmap.containsKey(urlNoFragString)) { |
| continue; |
| } |
| // Otherwise, create a new Loader for the URL. |
| Loader loader; |
| try { |
| loader = getLoader(url); |
| // If the loader defines a local class path then add the |
| // URLs to the list of URLs to be opened. |
| URL[] urls = loader.getClassPath(); |
| if (urls != null) { |
| push(urls); |
| } |
| } catch (IOException e) { |
| // Silently ignore for now... |
| continue; |
| } catch (SecurityException se) { |
| // Always silently ignore. The context, if there is one, that |
| // this URLClassPath was given during construction will never |
| // have permission to access the URL. |
| if (DEBUG) { |
| System.err.println("Failed to access " + url + ", " + se ); |
| } |
| continue; |
| } |
| // Finally, add the Loader to the search path. |
| loaders.add(loader); |
| lmap.put(urlNoFragString, loader); |
| } |
| return loaders.get(index); |
| } |
| |
| /* |
| * Returns the Loader for the specified base URL. |
| */ |
| private Loader getLoader(final URL url) throws IOException { |
| try { |
| return java.security.AccessController.doPrivileged( |
| new java.security.PrivilegedExceptionAction<>() { |
| public Loader run() throws IOException { |
| String protocol = url.getProtocol(); // lower cased in URL |
| String file = url.getFile(); |
| if (file != null && file.endsWith("/")) { |
| if ("file".equals(protocol)) { |
| return new FileLoader(url); |
| } else if ("jar".equals(protocol) && |
| isDefaultJarHandler(url) && |
| file.endsWith("!/")) { |
| // extract the nested URL |
| URL nestedUrl = new URL(file.substring(0, file.length() - 2)); |
| return new JarLoader(nestedUrl, jarHandler, lmap, acc); |
| } else { |
| return new Loader(url); |
| } |
| } else { |
| return new JarLoader(url, jarHandler, lmap, acc); |
| } |
| } |
| }, acc); |
| } catch (java.security.PrivilegedActionException pae) { |
| throw (IOException)pae.getException(); |
| } |
| } |
| |
| private static final JavaNetURLAccess JNUA |
| = SharedSecrets.getJavaNetURLAccess(); |
| |
| private static boolean isDefaultJarHandler(URL u) { |
| URLStreamHandler h = JNUA.getHandler(u); |
| return h instanceof sun.net.www.protocol.jar.Handler; |
| } |
| |
| /* |
| * Pushes the specified URLs onto the list of unopened URLs. |
| */ |
| private void push(URL[] us) { |
| synchronized (urls) { |
| for (int i = us.length - 1; i >= 0; --i) { |
| urls.push(us[i]); |
| } |
| } |
| } |
| |
| /* |
| * Check whether the resource URL should be returned. |
| * Return null on security check failure. |
| * Called by java.net.URLClassLoader. |
| */ |
| public static URL checkURL(URL url) { |
| if (url != null) { |
| try { |
| check(url); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| return url; |
| } |
| |
| /* |
| * Check whether the resource URL should be returned. |
| * Throw exception on failure. |
| * Called internally within this file. |
| */ |
| public static void check(URL url) throws IOException { |
| SecurityManager security = System.getSecurityManager(); |
| if (security != null) { |
| URLConnection urlConnection = url.openConnection(); |
| Permission perm = urlConnection.getPermission(); |
| if (perm != null) { |
| try { |
| security.checkPermission(perm); |
| } catch (SecurityException se) { |
| // fallback to checkRead/checkConnect for pre 1.2 |
| // security managers |
| if ((perm instanceof java.io.FilePermission) && |
| perm.getActions().indexOf("read") != -1) { |
| security.checkRead(perm.getName()); |
| } else if ((perm instanceof |
| java.net.SocketPermission) && |
| perm.getActions().indexOf("connect") != -1) { |
| URL locUrl = url; |
| if (urlConnection instanceof JarURLConnection) { |
| locUrl = ((JarURLConnection)urlConnection).getJarFileURL(); |
| } |
| security.checkConnect(locUrl.getHost(), |
| locUrl.getPort()); |
| } else { |
| throw se; |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Nested class used to represent a loader of resources and classes |
| * from a base URL. |
| */ |
| private static class Loader implements Closeable { |
| private final URL base; |
| private JarFile jarfile; // if this points to a jar file |
| |
| /* |
| * Creates a new Loader for the specified URL. |
| */ |
| Loader(URL url) { |
| base = url; |
| } |
| |
| /* |
| * Returns the base URL for this Loader. |
| */ |
| URL getBaseURL() { |
| return base; |
| } |
| |
| URL findResource(final String name, boolean check) { |
| URL url; |
| try { |
| url = new URL(base, ParseUtil.encodePath(name, false)); |
| } catch (MalformedURLException e) { |
| throw new IllegalArgumentException("name"); |
| } |
| |
| try { |
| if (check) { |
| URLClassPath.check(url); |
| } |
| |
| /* |
| * For a HTTP connection we use the HEAD method to |
| * check if the resource exists. |
| */ |
| URLConnection uc = url.openConnection(); |
| if (uc instanceof HttpURLConnection) { |
| HttpURLConnection hconn = (HttpURLConnection)uc; |
| hconn.setRequestMethod("HEAD"); |
| if (hconn.getResponseCode() >= HttpURLConnection.HTTP_BAD_REQUEST) { |
| return null; |
| } |
| } else { |
| // our best guess for the other cases |
| uc.setUseCaches(false); |
| InputStream is = uc.getInputStream(); |
| is.close(); |
| } |
| return url; |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| |
| Resource getResource(final String name, boolean check) { |
| final URL url; |
| try { |
| url = new URL(base, ParseUtil.encodePath(name, false)); |
| } catch (MalformedURLException e) { |
| throw new IllegalArgumentException("name"); |
| } |
| final URLConnection uc; |
| try { |
| if (check) { |
| URLClassPath.check(url); |
| } |
| uc = url.openConnection(); |
| InputStream in = uc.getInputStream(); |
| if (uc instanceof JarURLConnection) { |
| /* Need to remember the jar file so it can be closed |
| * in a hurry. |
| */ |
| JarURLConnection juc = (JarURLConnection)uc; |
| jarfile = JarLoader.checkJar(juc.getJarFile()); |
| } |
| } catch (Exception e) { |
| return null; |
| } |
| return new Resource() { |
| public String getName() { return name; } |
| public URL getURL() { return url; } |
| public URL getCodeSourceURL() { return base; } |
| public InputStream getInputStream() throws IOException { |
| return uc.getInputStream(); |
| } |
| public int getContentLength() throws IOException { |
| return uc.getContentLength(); |
| } |
| }; |
| } |
| |
| /* |
| * Returns the Resource for the specified name, or null if not |
| * found or the caller does not have the permission to get the |
| * resource. |
| */ |
| Resource getResource(final String name) { |
| return getResource(name, true); |
| } |
| |
| /* |
| * close this loader and release all resources |
| * method overridden in sub-classes |
| */ |
| @Override |
| public void close() throws IOException { |
| if (jarfile != null) { |
| jarfile.close(); |
| } |
| } |
| |
| /* |
| * Returns the local class path for this loader, or null if none. |
| */ |
| URL[] getClassPath() throws IOException { |
| return null; |
| } |
| } |
| |
| /* |
| * Nested class class used to represent a Loader of resources from a JAR URL. |
| */ |
| static class JarLoader extends Loader { |
| private JarFile jar; |
| private final URL csu; |
| private JarIndex index; |
| private URLStreamHandler handler; |
| private final HashMap<String, Loader> lmap; |
| private final AccessControlContext acc; |
| private boolean closed = false; |
| private static final JavaUtilZipFileAccess zipAccess = |
| SharedSecrets.getJavaUtilZipFileAccess(); |
| |
| /* |
| * Creates a new JarLoader for the specified URL referring to |
| * a JAR file. |
| */ |
| JarLoader(URL url, URLStreamHandler jarHandler, |
| HashMap<String, Loader> loaderMap, |
| AccessControlContext acc) |
| throws IOException |
| { |
| super(new URL("jar", "", -1, url + "!/", jarHandler)); |
| csu = url; |
| handler = jarHandler; |
| lmap = loaderMap; |
| this.acc = acc; |
| |
| ensureOpen(); |
| } |
| |
| @Override |
| public void close () throws IOException { |
| // closing is synchronized at higher level |
| if (!closed) { |
| closed = true; |
| // in case not already open. |
| ensureOpen(); |
| jar.close(); |
| } |
| } |
| |
| JarFile getJarFile () { |
| return jar; |
| } |
| |
| private boolean isOptimizable(URL url) { |
| return "file".equals(url.getProtocol()); |
| } |
| |
| private void ensureOpen() throws IOException { |
| if (jar == null) { |
| try { |
| java.security.AccessController.doPrivileged( |
| new java.security.PrivilegedExceptionAction<>() { |
| public Void run() throws IOException { |
| if (DEBUG) { |
| System.err.println("Opening " + csu); |
| Thread.dumpStack(); |
| } |
| |
| jar = getJarFile(csu); |
| index = JarIndex.getJarIndex(jar); |
| if (index != null) { |
| String[] jarfiles = index.getJarFiles(); |
| // Add all the dependent URLs to the lmap so that loaders |
| // will not be created for them by URLClassPath.getLoader(int) |
| // if the same URL occurs later on the main class path. We set |
| // Loader to null here to avoid creating a Loader for each |
| // URL until we actually need to try to load something from them. |
| for(int i = 0; i < jarfiles.length; i++) { |
| try { |
| URL jarURL = new URL(csu, jarfiles[i]); |
| // If a non-null loader already exists, leave it alone. |
| String urlNoFragString = URLUtil.urlNoFragString(jarURL); |
| if (!lmap.containsKey(urlNoFragString)) { |
| lmap.put(urlNoFragString, null); |
| } |
| } catch (MalformedURLException e) { |
| continue; |
| } |
| } |
| } |
| return null; |
| } |
| }, acc); |
| } catch (java.security.PrivilegedActionException pae) { |
| throw (IOException)pae.getException(); |
| } |
| } |
| } |
| |
| /* Throws if the given jar file is does not start with the correct LOC */ |
| static JarFile checkJar(JarFile jar) throws IOException { |
| if (System.getSecurityManager() != null && !DISABLE_JAR_CHECKING |
| && !zipAccess.startsWithLocHeader(jar)) { |
| IOException x = new IOException("Invalid Jar file"); |
| try { |
| jar.close(); |
| } catch (IOException ex) { |
| x.addSuppressed(ex); |
| } |
| throw x; |
| } |
| |
| return jar; |
| } |
| |
| private JarFile getJarFile(URL url) throws IOException { |
| // Optimize case where url refers to a local jar file |
| if (isOptimizable(url)) { |
| FileURLMapper p = new FileURLMapper (url); |
| if (!p.exists()) { |
| throw new FileNotFoundException(p.getPath()); |
| } |
| return checkJar(new JarFile(new File(p.getPath()), true, ZipFile.OPEN_READ, |
| JarFile.runtimeVersion())); |
| } |
| URLConnection uc = (new URL(getBaseURL(), "#runtime")).openConnection(); |
| uc.setRequestProperty(USER_AGENT_JAVA_VERSION, JAVA_VERSION); |
| JarFile jarFile = ((JarURLConnection)uc).getJarFile(); |
| return checkJar(jarFile); |
| } |
| |
| /* |
| * Returns the index of this JarLoader if it exists. |
| */ |
| JarIndex getIndex() { |
| try { |
| ensureOpen(); |
| } catch (IOException e) { |
| throw new InternalError(e); |
| } |
| return index; |
| } |
| |
| /* |
| * Creates the resource and if the check flag is set to true, checks if |
| * is its okay to return the resource. |
| */ |
| Resource checkResource(final String name, boolean check, |
| final JarEntry entry) { |
| |
| final URL url; |
| try { |
| String nm; |
| if (jar.isMultiRelease()) { |
| nm = SharedSecrets.javaUtilJarAccess().getRealName(jar, entry); |
| } else { |
| nm = name; |
| } |
| url = new URL(getBaseURL(), ParseUtil.encodePath(nm, false)); |
| if (check) { |
| URLClassPath.check(url); |
| } |
| } catch (MalformedURLException e) { |
| return null; |
| // throw new IllegalArgumentException("name"); |
| } catch (IOException e) { |
| return null; |
| } catch (AccessControlException e) { |
| return null; |
| } |
| |
| return new Resource() { |
| public String getName() { return name; } |
| public URL getURL() { return url; } |
| public URL getCodeSourceURL() { return csu; } |
| public InputStream getInputStream() throws IOException |
| { return jar.getInputStream(entry); } |
| public int getContentLength() |
| { return (int)entry.getSize(); } |
| public Manifest getManifest() throws IOException |
| { return jar.getManifest(); }; |
| public Certificate[] getCertificates() |
| { return entry.getCertificates(); }; |
| public CodeSigner[] getCodeSigners() |
| { return entry.getCodeSigners(); }; |
| }; |
| } |
| |
| |
| /* |
| * Returns true iff at least one resource in the jar file has the same |
| * package name as that of the specified resource name. |
| */ |
| boolean validIndex(final String name) { |
| String packageName = name; |
| int pos; |
| if((pos = name.lastIndexOf('/')) != -1) { |
| packageName = name.substring(0, pos); |
| } |
| |
| String entryName; |
| ZipEntry entry; |
| Enumeration<JarEntry> enum_ = jar.entries(); |
| while (enum_.hasMoreElements()) { |
| entry = enum_.nextElement(); |
| entryName = entry.getName(); |
| if((pos = entryName.lastIndexOf('/')) != -1) |
| entryName = entryName.substring(0, pos); |
| if (entryName.equals(packageName)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * Returns the URL for a resource with the specified name |
| */ |
| @Override |
| URL findResource(final String name, boolean check) { |
| Resource rsc = getResource(name, check); |
| if (rsc != null) { |
| return rsc.getURL(); |
| } |
| return null; |
| } |
| |
| /* |
| * Returns the JAR Resource for the specified name. |
| */ |
| @Override |
| Resource getResource(final String name, boolean check) { |
| try { |
| ensureOpen(); |
| } catch (IOException e) { |
| throw new InternalError(e); |
| } |
| final JarEntry entry = jar.getJarEntry(name); |
| if (entry != null) |
| return checkResource(name, check, entry); |
| |
| if (index == null) |
| return null; |
| |
| HashSet<String> visited = new HashSet<>(); |
| return getResource(name, check, visited); |
| } |
| |
| /* |
| * Version of getResource() that tracks the jar files that have been |
| * visited by linking through the index files. This helper method uses |
| * a HashSet to store the URLs of jar files that have been searched and |
| * uses it to avoid going into an infinite loop, looking for a |
| * non-existent resource |
| */ |
| Resource getResource(final String name, boolean check, |
| Set<String> visited) { |
| Resource res; |
| String[] jarFiles; |
| int count = 0; |
| LinkedList<String> jarFilesList = null; |
| |
| /* If there no jar files in the index that can potential contain |
| * this resource then return immediately. |
| */ |
| if((jarFilesList = index.get(name)) == null) |
| return null; |
| |
| do { |
| int size = jarFilesList.size(); |
| jarFiles = jarFilesList.toArray(new String[size]); |
| /* loop through the mapped jar file list */ |
| while(count < size) { |
| String jarName = jarFiles[count++]; |
| JarLoader newLoader; |
| final URL url; |
| |
| try{ |
| url = new URL(csu, jarName); |
| String urlNoFragString = URLUtil.urlNoFragString(url); |
| if ((newLoader = (JarLoader)lmap.get(urlNoFragString)) == null) { |
| /* no loader has been set up for this jar file |
| * before |
| */ |
| newLoader = AccessController.doPrivileged( |
| new PrivilegedExceptionAction<>() { |
| public JarLoader run() throws IOException { |
| return new JarLoader(url, handler, |
| lmap, acc); |
| } |
| }, acc); |
| |
| /* this newly opened jar file has its own index, |
| * merge it into the parent's index, taking into |
| * account the relative path. |
| */ |
| JarIndex newIndex = newLoader.getIndex(); |
| if(newIndex != null) { |
| int pos = jarName.lastIndexOf('/'); |
| newIndex.merge(this.index, (pos == -1 ? |
| null : jarName.substring(0, pos + 1))); |
| } |
| |
| /* put it in the global hashtable */ |
| lmap.put(urlNoFragString, newLoader); |
| } |
| } catch (java.security.PrivilegedActionException pae) { |
| continue; |
| } catch (MalformedURLException e) { |
| continue; |
| } |
| |
| /* Note that the addition of the url to the list of visited |
| * jars incorporates a check for presence in the hashmap |
| */ |
| boolean visitedURL = !visited.add(URLUtil.urlNoFragString(url)); |
| if (!visitedURL) { |
| try { |
| newLoader.ensureOpen(); |
| } catch (IOException e) { |
| throw new InternalError(e); |
| } |
| final JarEntry entry = newLoader.jar.getJarEntry(name); |
| if (entry != null) { |
| return newLoader.checkResource(name, check, entry); |
| } |
| |
| /* Verify that at least one other resource with the |
| * same package name as the lookedup resource is |
| * present in the new jar |
| */ |
| if (!newLoader.validIndex(name)) { |
| /* the mapping is wrong */ |
| throw new InvalidJarIndexError("Invalid index"); |
| } |
| } |
| |
| /* If newLoader is the current loader or if it is a |
| * loader that has already been searched or if the new |
| * loader does not have an index then skip it |
| * and move on to the next loader. |
| */ |
| if (visitedURL || newLoader == this || |
| newLoader.getIndex() == null) { |
| continue; |
| } |
| |
| /* Process the index of the new loader |
| */ |
| if((res = newLoader.getResource(name, check, visited)) |
| != null) { |
| return res; |
| } |
| } |
| // Get the list of jar files again as the list could have grown |
| // due to merging of index files. |
| jarFilesList = index.get(name); |
| |
| // If the count is unchanged, we are done. |
| } while(count < jarFilesList.size()); |
| return null; |
| } |
| |
| |
| /* |
| * Returns the JAR file local class path, or null if none. |
| */ |
| @Override |
| URL[] getClassPath() throws IOException { |
| if (index != null) { |
| return null; |
| } |
| |
| ensureOpen(); |
| |
| // Only get manifest when necessary |
| if (SharedSecrets.javaUtilJarAccess().jarFileHasClassPathAttribute(jar)) { |
| Manifest man = jar.getManifest(); |
| if (man != null) { |
| Attributes attr = man.getMainAttributes(); |
| if (attr != null) { |
| String value = attr.getValue(Name.CLASS_PATH); |
| if (value != null) { |
| return parseClassPath(csu, value); |
| } |
| } |
| } |
| } |
| return null; |
| } |
| |
| /* |
| * Parses value of the Class-Path manifest attribute and returns |
| * an array of URLs relative to the specified base URL. |
| */ |
| private static URL[] parseClassPath(URL base, String value) |
| throws MalformedURLException |
| { |
| StringTokenizer st = new StringTokenizer(value); |
| URL[] urls = new URL[st.countTokens()]; |
| int i = 0; |
| while (st.hasMoreTokens()) { |
| String path = st.nextToken(); |
| urls[i] = new URL(base, path); |
| i++; |
| } |
| return urls; |
| } |
| } |
| |
| /* |
| * Nested class used to represent a loader of classes and resources |
| * from a file URL that refers to a directory. |
| */ |
| private static class FileLoader extends Loader { |
| /* Canonicalized File */ |
| private File dir; |
| |
| FileLoader(URL url) throws IOException { |
| super(url); |
| if (!"file".equals(url.getProtocol())) { |
| throw new IllegalArgumentException("url"); |
| } |
| String path = url.getFile().replace('/', File.separatorChar); |
| path = ParseUtil.decode(path); |
| dir = (new File(path)).getCanonicalFile(); |
| } |
| |
| /* |
| * Returns the URL for a resource with the specified name |
| */ |
| @Override |
| URL findResource(final String name, boolean check) { |
| Resource rsc = getResource(name, check); |
| if (rsc != null) { |
| return rsc.getURL(); |
| } |
| return null; |
| } |
| |
| @Override |
| Resource getResource(final String name, boolean check) { |
| final URL url; |
| try { |
| URL normalizedBase = new URL(getBaseURL(), "."); |
| url = new URL(getBaseURL(), ParseUtil.encodePath(name, false)); |
| |
| if (url.getFile().startsWith(normalizedBase.getFile()) == false) { |
| // requested resource had ../..'s in path |
| return null; |
| } |
| |
| if (check) |
| URLClassPath.check(url); |
| |
| final File file; |
| if (name.indexOf("..") != -1) { |
| file = (new File(dir, name.replace('/', File.separatorChar))) |
| .getCanonicalFile(); |
| if ( !((file.getPath()).startsWith(dir.getPath())) ) { |
| /* outside of base dir */ |
| return null; |
| } |
| } else { |
| file = new File(dir, name.replace('/', File.separatorChar)); |
| } |
| |
| if (file.exists()) { |
| return new Resource() { |
| public String getName() { return name; }; |
| public URL getURL() { return url; }; |
| public URL getCodeSourceURL() { return getBaseURL(); }; |
| public InputStream getInputStream() throws IOException |
| { return new FileInputStream(file); }; |
| public int getContentLength() throws IOException |
| { return (int)file.length(); }; |
| }; |
| } |
| } catch (Exception e) { |
| return null; |
| } |
| return null; |
| } |
| } |
| } |
