mirror of
https://github.com/openjdk/jdk.git
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1216 lines
44 KiB
Java
1216 lines
44 KiB
Java
/*
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* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.internal.loader;
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import java.io.Closeable;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.JarURLConnection;
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import java.net.MalformedURLException;
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import java.net.URI;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.URLStreamHandler;
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import java.net.URLStreamHandlerFactory;
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import java.security.AccessControlContext;
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import java.security.AccessControlException;
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import java.security.AccessController;
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import java.security.CodeSigner;
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import java.security.Permission;
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import java.security.PrivilegedActionException;
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import java.security.PrivilegedExceptionAction;
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import java.security.cert.Certificate;
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import java.util.ArrayDeque;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Enumeration;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.NoSuchElementException;
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import java.util.Properties;
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import java.util.Set;
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import java.util.StringTokenizer;
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import java.util.jar.JarFile;
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import java.util.zip.ZipEntry;
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import java.util.jar.JarEntry;
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import java.util.jar.Manifest;
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import java.util.jar.Attributes;
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import java.util.jar.Attributes.Name;
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import java.util.zip.ZipFile;
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import jdk.internal.access.JavaNetURLAccess;
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import jdk.internal.access.JavaUtilZipFileAccess;
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import jdk.internal.access.SharedSecrets;
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import jdk.internal.util.jar.InvalidJarIndexError;
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import jdk.internal.util.jar.JarIndex;
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import sun.net.util.URLUtil;
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import sun.net.www.ParseUtil;
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import sun.security.action.GetPropertyAction;
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/**
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* This class is used to maintain a search path of URLs for loading classes
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* and resources from both JAR files and directories.
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*
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* @author David Connelly
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*/
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public class URLClassPath {
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private static final String USER_AGENT_JAVA_VERSION = "UA-Java-Version";
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private static final String JAVA_VERSION;
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private static final boolean DEBUG;
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private static final boolean DISABLE_JAR_CHECKING;
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private static final boolean DISABLE_ACC_CHECKING;
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private static final boolean DISABLE_CP_URL_CHECK;
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private static final boolean DEBUG_CP_URL_CHECK;
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static {
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Properties props = GetPropertyAction.privilegedGetProperties();
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JAVA_VERSION = props.getProperty("java.version");
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DEBUG = (props.getProperty("sun.misc.URLClassPath.debug") != null);
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String p = props.getProperty("sun.misc.URLClassPath.disableJarChecking");
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DISABLE_JAR_CHECKING = p != null ? p.equals("true") || p.isEmpty() : false;
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p = props.getProperty("jdk.net.URLClassPath.disableRestrictedPermissions");
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DISABLE_ACC_CHECKING = p != null ? p.equals("true") || p.isEmpty() : false;
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// This property will be removed in a later release
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p = props.getProperty("jdk.net.URLClassPath.disableClassPathURLCheck", "true");
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DISABLE_CP_URL_CHECK = p != null ? p.equals("true") || p.isEmpty() : false;
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DEBUG_CP_URL_CHECK = "debug".equals(p);
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}
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/* The original search path of URLs. */
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private final ArrayList<URL> path;
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/* The deque of unopened URLs */
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private final ArrayDeque<URL> unopenedUrls;
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/* The resulting search path of Loaders */
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private final ArrayList<Loader> loaders = new ArrayList<>();
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/* Map of each URL opened to its corresponding Loader */
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private final HashMap<String, Loader> lmap = new HashMap<>();
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/* The jar protocol handler to use when creating new URLs */
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private final URLStreamHandler jarHandler;
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/* Whether this URLClassLoader has been closed yet */
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private boolean closed = false;
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/* The context to be used when loading classes and resources. If non-null
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* this is the context that was captured during the creation of the
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* URLClassLoader. null implies no additional security restrictions. */
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private final AccessControlContext acc;
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/**
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* Creates a new URLClassPath for the given URLs. The URLs will be
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* searched in the order specified for classes and resources. A URL
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* ending with a '/' is assumed to refer to a directory. Otherwise,
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* the URL is assumed to refer to a JAR file.
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*
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* @param urls the directory and JAR file URLs to search for classes
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* and resources
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* @param factory the URLStreamHandlerFactory to use when creating new URLs
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* @param acc the context to be used when loading classes and resources, may
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* be null
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*/
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public URLClassPath(URL[] urls,
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URLStreamHandlerFactory factory,
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AccessControlContext acc) {
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ArrayList<URL> path = new ArrayList<>(urls.length);
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ArrayDeque<URL> unopenedUrls = new ArrayDeque<>(urls.length);
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for (URL url : urls) {
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path.add(url);
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unopenedUrls.add(url);
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}
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this.path = path;
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this.unopenedUrls = unopenedUrls;
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if (factory != null) {
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jarHandler = factory.createURLStreamHandler("jar");
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} else {
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jarHandler = null;
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}
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if (DISABLE_ACC_CHECKING)
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this.acc = null;
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else
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this.acc = acc;
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}
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public URLClassPath(URL[] urls, AccessControlContext acc) {
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this(urls, null, acc);
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}
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/**
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* Constructs a URLClassPath from a class path string.
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*
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* @param cp the class path string
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* @param skipEmptyElements indicates if empty elements are ignored or
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* treated as the current working directory
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*
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* @apiNote Used to create the application class path.
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*/
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URLClassPath(String cp, boolean skipEmptyElements) {
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ArrayList<URL> path = new ArrayList<>();
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if (cp != null) {
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// map each element of class path to a file URL
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int off = 0, next;
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do {
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next = cp.indexOf(File.pathSeparator, off);
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String element = (next == -1)
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? cp.substring(off)
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: cp.substring(off, next);
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if (!element.isEmpty() || !skipEmptyElements) {
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URL url = toFileURL(element);
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if (url != null) path.add(url);
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}
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off = next + 1;
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} while (next != -1);
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}
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// can't use ArrayDeque#addAll or new ArrayDeque(Collection);
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// it's too early in the bootstrap to trigger use of lambdas
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int size = path.size();
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ArrayDeque<URL> unopenedUrls = new ArrayDeque<>(size);
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for (int i = 0; i < size; i++)
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unopenedUrls.add(path.get(i));
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this.unopenedUrls = unopenedUrls;
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this.path = path;
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this.jarHandler = null;
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this.acc = null;
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}
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public synchronized List<IOException> closeLoaders() {
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if (closed) {
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return Collections.emptyList();
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}
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List<IOException> result = new LinkedList<>();
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for (Loader loader : loaders) {
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try {
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loader.close();
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} catch (IOException e) {
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result.add(e);
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}
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}
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closed = true;
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return result;
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}
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/**
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* Appends the specified URL to the search path of directory and JAR
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* file URLs from which to load classes and resources.
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* <p>
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* If the URL specified is null or is already in the list of
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* URLs, then invoking this method has no effect.
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*/
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public synchronized void addURL(URL url) {
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if (closed || url == null)
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return;
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synchronized (unopenedUrls) {
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if (! path.contains(url)) {
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unopenedUrls.addLast(url);
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path.add(url);
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}
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}
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}
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/**
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* Appends the specified file path as a file URL to the search path.
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*/
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public void addFile(String s) {
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URL url = toFileURL(s);
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if (url != null) {
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addURL(url);
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}
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}
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/**
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* Returns a file URL for the given file path.
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*/
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private static URL toFileURL(String s) {
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try {
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File f = new File(s).getCanonicalFile();
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return ParseUtil.fileToEncodedURL(f);
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} catch (IOException e) {
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return null;
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}
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}
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/**
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* Returns the original search path of URLs.
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*/
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public URL[] getURLs() {
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synchronized (unopenedUrls) {
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return path.toArray(new URL[0]);
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}
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}
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/**
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* Finds the resource with the specified name on the URL search path
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* or null if not found or security check fails.
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*
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* @param name the name of the resource
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* @param check whether to perform a security check
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* @return a {@code URL} for the resource, or {@code null}
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* if the resource could not be found.
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*/
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public URL findResource(String name, boolean check) {
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Loader loader;
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for (int i = 0; (loader = getLoader(i)) != null; i++) {
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URL url = loader.findResource(name, check);
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if (url != null) {
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return url;
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}
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}
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return null;
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}
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/**
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* Finds the first Resource on the URL search path which has the specified
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* name. Returns null if no Resource could be found.
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*
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* @param name the name of the Resource
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* @param check whether to perform a security check
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* @return the Resource, or null if not found
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*/
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public Resource getResource(String name, boolean check) {
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if (DEBUG) {
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System.err.println("URLClassPath.getResource(\"" + name + "\")");
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}
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Loader loader;
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for (int i = 0; (loader = getLoader(i)) != null; i++) {
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Resource res = loader.getResource(name, check);
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if (res != null) {
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return res;
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}
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}
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return null;
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}
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/**
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* Finds all resources on the URL search path with the given name.
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* Returns an enumeration of the URL objects.
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*
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* @param name the resource name
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* @return an Enumeration of all the urls having the specified name
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*/
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public Enumeration<URL> findResources(final String name,
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final boolean check) {
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return new Enumeration<>() {
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private int index = 0;
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private URL url = null;
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private boolean next() {
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if (url != null) {
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return true;
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} else {
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Loader loader;
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while ((loader = getLoader(index++)) != null) {
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url = loader.findResource(name, check);
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if (url != null) {
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return true;
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}
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}
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return false;
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}
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}
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public boolean hasMoreElements() {
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return next();
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}
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public URL nextElement() {
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if (!next()) {
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throw new NoSuchElementException();
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}
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URL u = url;
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url = null;
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return u;
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}
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};
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}
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public Resource getResource(String name) {
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return getResource(name, true);
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}
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/**
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* Finds all resources on the URL search path with the given name.
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* Returns an enumeration of the Resource objects.
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*
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* @param name the resource name
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* @return an Enumeration of all the resources having the specified name
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*/
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public Enumeration<Resource> getResources(final String name,
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final boolean check) {
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return new Enumeration<>() {
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private int index = 0;
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private Resource res = null;
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private boolean next() {
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if (res != null) {
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return true;
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} else {
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Loader loader;
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while ((loader = getLoader(index++)) != null) {
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res = loader.getResource(name, check);
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if (res != null) {
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return true;
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}
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}
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return false;
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}
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}
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public boolean hasMoreElements() {
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return next();
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}
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public Resource nextElement() {
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if (!next()) {
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throw new NoSuchElementException();
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}
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Resource r = res;
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res = null;
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return r;
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}
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};
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}
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public Enumeration<Resource> getResources(final String name) {
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return getResources(name, true);
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}
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/*
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* Returns the Loader at the specified position in the URL search
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* path. The URLs are opened and expanded as needed. Returns null
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* if the specified index is out of range.
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*/
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private synchronized Loader getLoader(int index) {
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if (closed) {
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return null;
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}
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// Expand URL search path until the request can be satisfied
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// or unopenedUrls is exhausted.
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while (loaders.size() < index + 1) {
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final URL url;
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synchronized (unopenedUrls) {
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url = unopenedUrls.pollFirst();
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if (url == null)
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return null;
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}
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// Skip this URL if it already has a Loader. (Loader
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// may be null in the case where URL has not been opened
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// but is referenced by a JAR index.)
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String urlNoFragString = URLUtil.urlNoFragString(url);
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if (lmap.containsKey(urlNoFragString)) {
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continue;
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}
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// Otherwise, create a new Loader for the URL.
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Loader loader;
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try {
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loader = getLoader(url);
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// If the loader defines a local class path then add the
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// URLs as the next URLs to be opened.
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URL[] urls = loader.getClassPath();
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if (urls != null) {
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push(urls);
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}
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} catch (IOException e) {
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// Silently ignore for now...
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continue;
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} catch (SecurityException se) {
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// Always silently ignore. The context, if there is one, that
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// this URLClassPath was given during construction will never
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// have permission to access the URL.
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if (DEBUG) {
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System.err.println("Failed to access " + url + ", " + se );
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}
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continue;
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}
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// Finally, add the Loader to the search path.
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loaders.add(loader);
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lmap.put(urlNoFragString, loader);
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}
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return loaders.get(index);
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}
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/*
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* Returns the Loader for the specified base URL.
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*/
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private Loader getLoader(final URL url) throws IOException {
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try {
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return AccessController.doPrivileged(
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new PrivilegedExceptionAction<>() {
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public Loader run() throws IOException {
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String protocol = url.getProtocol(); // lower cased in URL
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String file = url.getFile();
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if (file != null && file.endsWith("/")) {
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if ("file".equals(protocol)) {
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return new FileLoader(url);
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} else if ("jar".equals(protocol) &&
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isDefaultJarHandler(url) &&
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file.endsWith("!/")) {
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// extract the nested URL
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URL nestedUrl = new URL(file.substring(0, file.length() - 2));
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return new JarLoader(nestedUrl, jarHandler, lmap, acc);
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} else {
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return new Loader(url);
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}
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} else {
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return new JarLoader(url, jarHandler, lmap, acc);
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}
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}
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}, acc);
|
|
} catch (PrivilegedActionException pae) {
|
|
throw (IOException)pae.getException();
|
|
}
|
|
}
|
|
|
|
private static final JavaNetURLAccess JNUA
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= SharedSecrets.getJavaNetURLAccess();
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|
|
|
private static boolean isDefaultJarHandler(URL u) {
|
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URLStreamHandler h = JNUA.getHandler(u);
|
|
return h instanceof sun.net.www.protocol.jar.Handler;
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}
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|
|
/*
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|
* Pushes the specified URLs onto the head of unopened URLs.
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|
*/
|
|
private void push(URL[] urls) {
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synchronized (unopenedUrls) {
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for (int i = urls.length - 1; i >= 0; --i) {
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unopenedUrls.addFirst(urls[i]);
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|
}
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}
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}
|
|
|
|
/*
|
|
* Checks whether the resource URL should be returned.
|
|
* Returns null on security check failure.
|
|
* Called by java.net.URLClassLoader.
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|
*/
|
|
public static URL checkURL(URL url) {
|
|
if (url != null) {
|
|
try {
|
|
check(url);
|
|
} catch (Exception e) {
|
|
return null;
|
|
}
|
|
}
|
|
return url;
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|
}
|
|
|
|
/*
|
|
* Checks whether the resource URL should be returned.
|
|
* Throws 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);
|
|
}
|
|
|
|
/*
|
|
* Closes 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 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 {
|
|
AccessController.doPrivileged(
|
|
new 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 (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 = entry.getRealName();
|
|
} 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 {
|
|
SharedSecrets.javaUtilJarAccess().ensureInitialization(jar);
|
|
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 (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();
|
|
URL url = DISABLE_CP_URL_CHECK ? new URL(base, path) : safeResolve(base, path);
|
|
if (url != null) {
|
|
urls[i] = url;
|
|
i++;
|
|
}
|
|
}
|
|
if (i == 0) {
|
|
urls = null;
|
|
} else if (i != urls.length) {
|
|
// Truncate nulls from end of array
|
|
urls = Arrays.copyOf(urls, i);
|
|
}
|
|
return urls;
|
|
}
|
|
|
|
/*
|
|
* Return a URL for the given path resolved against the base URL, or
|
|
* null if the resulting URL is invalid.
|
|
*/
|
|
static URL safeResolve(URL base, String path) {
|
|
String child = path.replace(File.separatorChar, '/');
|
|
try {
|
|
if (!URI.create(child).isAbsolute()) {
|
|
URL url = new URL(base, child);
|
|
if (base.getProtocol().equalsIgnoreCase("file")) {
|
|
return url;
|
|
} else {
|
|
String bp = base.getPath();
|
|
String urlp = url.getPath();
|
|
int pos = bp.lastIndexOf('/');
|
|
if (pos == -1) {
|
|
pos = bp.length() - 1;
|
|
}
|
|
if (urlp.regionMatches(0, bp, 0, pos + 1)
|
|
&& urlp.indexOf("..", pos) == -1) {
|
|
return url;
|
|
}
|
|
}
|
|
}
|
|
} catch (MalformedURLException | IllegalArgumentException e) {}
|
|
if (DEBUG_CP_URL_CHECK) {
|
|
System.err.println("Class-Path entry: \"" + path + "\" ignored in JAR file " + base);
|
|
}
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|
|
}
|