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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.catalina.loader;
- import java.io.ByteArrayInputStream;
- import java.io.File;
- import java.io.FileOutputStream;
- import java.io.FilePermission;
- import java.io.IOException;
- import java.io.InputStream;
- import java.lang.reflect.Field;
- import java.lang.reflect.Modifier;
- import java.net.MalformedURLException;
- import java.net.URL;
- import java.net.URLClassLoader;
- import java.security.AccessControlException;
- import java.security.AccessController;
- import java.security.CodeSource;
- import java.security.Permission;
- import java.security.PermissionCollection;
- import java.security.Policy;
- import java.security.PrivilegedAction;
- import java.sql.Driver;
- import java.sql.DriverManager;
- import java.sql.SQLException;
- import java.util.ArrayList;
- import java.util.Enumeration;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.Vector;
- import java.util.jar.Attributes;
- import java.util.jar.JarEntry;
- import java.util.jar.JarFile;
- import java.util.jar.Manifest;
- import java.util.jar.Attributes.Name;
- import javax.naming.NameClassPair;
- import javax.naming.NamingEnumeration;
- import javax.naming.NamingException;
- import javax.naming.directory.DirContext;
- import org.apache.catalina.Globals;
- import org.apache.catalina.Lifecycle;
- import org.apache.catalina.LifecycleException;
- import org.apache.catalina.LifecycleListener;
- import org.apache.catalina.util.StringManager;
- import org.apache.naming.JndiPermission;
- import org.apache.naming.resources.Resource;
- import org.apache.naming.resources.ResourceAttributes;
- import org.apache.tomcat.util.IntrospectionUtils;
- /**
- * Specialized web application class loader.
- * <p>
- * This class loader is a full reimplementation of the
- * <code>URLClassLoader</code> from the JDK. It is desinged to be fully
- * compatible with a normal <code>URLClassLoader</code>, although its internal
- * behavior may be completely different.
- * <p>
- * <strong>IMPLEMENTATION NOTE</strong> - This class loader faithfully follows
- * the delegation model recommended in the specification. The system class
- * loader will be queried first, then the local repositories, and only then
- * delegation to the parent class loader will occur. This allows the web
- * application to override any shared class except the classes from J2SE.
- * Special handling is provided from the JAXP XML parser interfaces, the JNDI
- * interfaces, and the classes from the servlet API, which are never loaded
- * from the webapp repository.
- * <p>
- * <strong>IMPLEMENTATION NOTE</strong> - Due to limitations in Jasper
- * compilation technology, any repository which contains classes from
- * the servlet API will be ignored by the class loader.
- * <p>
- * <strong>IMPLEMENTATION NOTE</strong> - The class loader generates source
- * URLs which include the full JAR URL when a class is loaded from a JAR file,
- * which allows setting security permission at the class level, even when a
- * class is contained inside a JAR.
- * <p>
- * <strong>IMPLEMENTATION NOTE</strong> - Local repositories are searched in
- * the order they are added via the initial constructor and/or any subsequent
- * calls to <code>addRepository()</code> or <code>addJar()</code>.
- * <p>
- * <strong>IMPLEMENTATION NOTE</strong> - No check for sealing violations or
- * security is made unless a security manager is present.
- *
- * @author Remy Maucherat
- * @author Craig R. McClanahan
- * @version $Revision: 734579 $ $Date: 2009-01-15 01:26:00 +0100 (Thu, 15 Jan 2009) $
- */
- public class WebappClassLoader
- extends URLClassLoader
- implements Reloader, Lifecycle
- {
- protected static org.apache.juli.logging.Log log=
- org.apache.juli.logging.LogFactory.getLog( WebappClassLoader.class );
- public static final boolean ENABLE_CLEAR_REFERENCES =
- Boolean.valueOf(System.getProperty("org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES", "true")).booleanValue();
- protected class PrivilegedFindResource
- implements PrivilegedAction {
- protected File file;
- protected String path;
- PrivilegedFindResource(File file, String path) {
- this.file = file;
- this.path = path;
- }
- public Object run() {
- return findResourceInternal(file, path);
- }
- }
- protected final class PrivilegedGetClassLoader
- implements PrivilegedAction<ClassLoader> {
- public Class<?> clazz;
- public PrivilegedGetClassLoader(Class<?> clazz){
- this.clazz = clazz;
- }
- public ClassLoader run() {
- return clazz.getClassLoader();
- }
- }
- // ------------------------------------------------------- Static Variables
- /**
- * The set of trigger classes that will cause a proposed repository not
- * to be added if this class is visible to the class loader that loaded
- * this factory class. Typically, trigger classes will be listed for
- * components that have been integrated into the JDK for later versions,
- * but where the corresponding JAR files are required to run on
- * earlier versions.
- */
- protected static final String[] triggers = {
- "javax.servlet.Servlet" // Servlet API
- };
- /**
- * Set of package names which are not allowed to be loaded from a webapp
- * class loader without delegating first.
- */
- protected static final String[] packageTriggers = {
- };
- /**
- * The string manager for this package.
- */
- protected static final StringManager sm =
- StringManager.getManager(Constants.Package);
- /**
- * Use anti JAR locking code, which does URL rerouting when accessing
- * resources.
- */
- boolean antiJARLocking = false;
- // ----------------------------------------------------------- Constructors
- /**
- * Construct a new ClassLoader with no defined repositories and no
- * parent ClassLoader.
- */
- public WebappClassLoader() {
- super(new URL[0]);
- this.parent = getParent();
- system = getSystemClassLoader();
- securityManager = System.getSecurityManager();
- if (securityManager != null) {
- refreshPolicy();
- }
- }
- /**
- * Construct a new ClassLoader with no defined repositories and no
- * parent ClassLoader.
- */
- public WebappClassLoader(ClassLoader parent) {
- super(new URL[0], parent);
- this.parent = getParent();
- system = getSystemClassLoader();
- securityManager = System.getSecurityManager();
- if (securityManager != null) {
- refreshPolicy();
- }
- }
- // ----------------------------------------------------- Instance Variables
- /**
- * Associated directory context giving access to the resources in this
- * webapp.
- */
- protected DirContext resources = null;
- /**
- * The cache of ResourceEntry for classes and resources we have loaded,
- * keyed by resource name.
- */
- protected HashMap resourceEntries = new HashMap();
- /**
- * The list of not found resources.
- */
- protected HashMap notFoundResources = new HashMap();
- /**
- * Should this class loader delegate to the parent class loader
- * <strong>before</strong> searching its own repositories (i.e. the
- * usual Java2 delegation model)? If set to <code>false</code>,
- * this class loader will search its own repositories first, and
- * delegate to the parent only if the class or resource is not
- * found locally.
- */
- protected boolean delegate = false;
- /**
- * Last time a JAR was accessed.
- */
- protected long lastJarAccessed = 0L;
- /**
- * The list of local repositories, in the order they should be searched
- * for locally loaded classes or resources.
- */
- protected String[] repositories = new String[0];
- /**
- * Repositories URLs, used to cache the result of getURLs.
- */
- protected URL[] repositoryURLs = null;
- /**
- * Repositories translated as path in the work directory (for Jasper
- * originally), but which is used to generate fake URLs should getURLs be
- * called.
- */
- protected File[] files = new File[0];
- /**
- * The list of JARs, in the order they should be searched
- * for locally loaded classes or resources.
- */
- protected JarFile[] jarFiles = new JarFile[0];
- /**
- * The list of JARs, in the order they should be searched
- * for locally loaded classes or resources.
- */
- protected File[] jarRealFiles = new File[0];
- /**
- * The path which will be monitored for added Jar files.
- */
- protected String jarPath = null;
- /**
- * The list of JARs, in the order they should be searched
- * for locally loaded classes or resources.
- */
- protected String[] jarNames = new String[0];
- /**
- * The list of JARs last modified dates, in the order they should be
- * searched for locally loaded classes or resources.
- */
- protected long[] lastModifiedDates = new long[0];
- /**
- * The list of resources which should be checked when checking for
- * modifications.
- */
- protected String[] paths = new String[0];
- /**
- * A list of read File and Jndi Permission's required if this loader
- * is for a web application context.
- */
- protected ArrayList permissionList = new ArrayList();
- /**
- * Path where resources loaded from JARs will be extracted.
- */
- protected File loaderDir = null;
- /**
- * The PermissionCollection for each CodeSource for a web
- * application context.
- */
- protected HashMap loaderPC = new HashMap();
- /**
- * Instance of the SecurityManager installed.
- */
- protected SecurityManager securityManager = null;
- /**
- * The parent class loader.
- */
- protected ClassLoader parent = null;
- /**
- * The system class loader.
- */
- protected ClassLoader system = null;
- /**
- * Has this component been started?
- */
- protected boolean started = false;
- /**
- * Has external repositories.
- */
- protected boolean hasExternalRepositories = false;
- /**
- * need conversion for properties files
- */
- protected boolean needConvert = false;
- /**
- * All permission.
- */
- protected Permission allPermission = new java.security.AllPermission();
- // ------------------------------------------------------------- Properties
- /**
- * Get associated resources.
- */
- public DirContext getResources() {
- return this.resources;
- }
- /**
- * Set associated resources.
- */
- public void setResources(DirContext resources) {
- this.resources = resources;
- }
- /**
- * Return the "delegate first" flag for this class loader.
- */
- public boolean getDelegate() {
- return (this.delegate);
- }
- /**
- * Set the "delegate first" flag for this class loader.
- *
- * @param delegate The new "delegate first" flag
- */
- public void setDelegate(boolean delegate) {
- this.delegate = delegate;
- }
- /**
- * @return Returns the antiJARLocking.
- */
- public boolean getAntiJARLocking() {
- return antiJARLocking;
- }
- /**
- * @param antiJARLocking The antiJARLocking to set.
- */
- public void setAntiJARLocking(boolean antiJARLocking) {
- this.antiJARLocking = antiJARLocking;
- }
- /**
- * If there is a Java SecurityManager create a read FilePermission
- * or JndiPermission for the file directory path.
- *
- * @param path file directory path
- */
- public void addPermission(String path) {
- if (path == null) {
- return;
- }
- if (securityManager != null) {
- Permission permission = null;
- if( path.startsWith("jndi:") || path.startsWith("jar:jndi:") ) {
- if (!path.endsWith("/")) {
- path = path + "/";
- }
- permission = new JndiPermission(path + "*");
- addPermission(permission);
- } else {
- if (!path.endsWith(File.separator)) {
- permission = new FilePermission(path, "read");
- addPermission(permission);
- path = path + File.separator;
- }
- permission = new FilePermission(path + "-", "read");
- addPermission(permission);
- }
- }
- }
- /**
- * If there is a Java SecurityManager create a read FilePermission
- * or JndiPermission for URL.
- *
- * @param url URL for a file or directory on local system
- */
- public void addPermission(URL url) {
- if (url != null) {
- addPermission(url.toString());
- }
- }
- /**
- * If there is a Java SecurityManager create a Permission.
- *
- * @param permission The permission
- */
- public void addPermission(Permission permission) {
- if ((securityManager != null) && (permission != null)) {
- permissionList.add(permission);
- }
- }
- /**
- * Return the JAR path.
- */
- public String getJarPath() {
- return this.jarPath;
- }
- /**
- * Change the Jar path.
- */
- public void setJarPath(String jarPath) {
- this.jarPath = jarPath;
- }
- /**
- * Change the work directory.
- */
- public void setWorkDir(File workDir) {
- this.loaderDir = new File(workDir, "loader");
- }
- /**
- * Utility method for use in subclasses.
- * Must be called before Lifecycle methods to have any effect.
- */
- protected void setParentClassLoader(ClassLoader pcl) {
- parent = pcl;
- }
- // ------------------------------------------------------- Reloader Methods
- /**
- * Add a new repository to the set of places this ClassLoader can look for
- * classes to be loaded.
- *
- * @param repository Name of a source of classes to be loaded, such as a
- * directory pathname, a JAR file pathname, or a ZIP file pathname
- *
- * @exception IllegalArgumentException if the specified repository is
- * invalid or does not exist
- */
- public void addRepository(String repository) {
- // Ignore any of the standard repositories, as they are set up using
- // either addJar or addRepository
- if (repository.startsWith("/WEB-INF/lib")
- || repository.startsWith("/WEB-INF/classes"))
- return;
- // Add this repository to our underlying class loader
- try {
- URL url = new URL(repository);
- super.addURL(url);
- hasExternalRepositories = true;
- repositoryURLs = null;
- } catch (MalformedURLException e) {
- IllegalArgumentException iae = new IllegalArgumentException
- ("Invalid repository: " + repository);
- iae.initCause(e);
- throw iae;
- }
- }
- /**
- * Add a new repository to the set of places this ClassLoader can look for
- * classes to be loaded.
- *
- * @param repository Name of a source of classes to be loaded, such as a
- * directory pathname, a JAR file pathname, or a ZIP file pathname
- *
- * @exception IllegalArgumentException if the specified repository is
- * invalid or does not exist
- */
- synchronized void addRepository(String repository, File file) {
- // Note : There should be only one (of course), but I think we should
- // keep this a bit generic
- if (repository == null)
- return;
- if (log.isDebugEnabled())
- log.debug("addRepository(" + repository + ")");
- int i;
- // Add this repository to our internal list
- String[] result = new String[repositories.length + 1];
- for (i = 0; i < repositories.length; i++) {
- result[i] = repositories[i];
- }
- result[repositories.length] = repository;
- repositories = result;
- // Add the file to the list
- File[] result2 = new File[files.length + 1];
- for (i = 0; i < files.length; i++) {
- result2[i] = files[i];
- }
- result2[files.length] = file;
- files = result2;
- }
- synchronized void addJar(String jar, JarFile jarFile, File file)
- throws IOException {
- if (jar == null)
- return;
- if (jarFile == null)
- return;
- if (file == null)
- return;
- if (log.isDebugEnabled())
- log.debug("addJar(" + jar + ")");
- int i;
- if ((jarPath != null) && (jar.startsWith(jarPath))) {
- String jarName = jar.substring(jarPath.length());
- while (jarName.startsWith("/"))
- jarName = jarName.substring(1);
- String[] result = new String[jarNames.length + 1];
- for (i = 0; i < jarNames.length; i++) {
- result[i] = jarNames[i];
- }
- result[jarNames.length] = jarName;
- jarNames = result;
- }
- try {
- // Register the JAR for tracking
- long lastModified =
- ((ResourceAttributes) resources.getAttributes(jar))
- .getLastModified();
- String[] result = new String[paths.length + 1];
- for (i = 0; i < paths.length; i++) {
- result[i] = paths[i];
- }
- result[paths.length] = jar;
- paths = result;
- long[] result3 = new long[lastModifiedDates.length + 1];
- for (i = 0; i < lastModifiedDates.length; i++) {
- result3[i] = lastModifiedDates[i];
- }
- result3[lastModifiedDates.length] = lastModified;
- lastModifiedDates = result3;
- } catch (NamingException e) {
- // Ignore
- }
- // If the JAR currently contains invalid classes, don't actually use it
- // for classloading
- if (!validateJarFile(file))
- return;
- JarFile[] result2 = new JarFile[jarFiles.length + 1];
- for (i = 0; i < jarFiles.length; i++) {
- result2[i] = jarFiles[i];
- }
- result2[jarFiles.length] = jarFile;
- jarFiles = result2;
- // Add the file to the list
- File[] result4 = new File[jarRealFiles.length + 1];
- for (i = 0; i < jarRealFiles.length; i++) {
- result4[i] = jarRealFiles[i];
- }
- result4[jarRealFiles.length] = file;
- jarRealFiles = result4;
- }
- /**
- * Return a String array of the current repositories for this class
- * loader. If there are no repositories, a zero-length array is
- * returned.For security reason, returns a clone of the Array (since
- * String are immutable).
- */
- public String[] findRepositories() {
- return ((String[])repositories.clone());
- }
- /**
- * Have one or more classes or resources been modified so that a reload
- * is appropriate?
- */
- public boolean modified() {
- if (log.isDebugEnabled())
- log.debug("modified()");
- // Checking for modified loaded resources
- int length = paths.length;
- // A rare race condition can occur in the updates of the two arrays
- // It's totally ok if the latest class added is not checked (it will
- // be checked the next time
- int length2 = lastModifiedDates.length;
- if (length > length2)
- length = length2;
- for (int i = 0; i < length; i++) {
- try {
- long lastModified =
- ((ResourceAttributes) resources.getAttributes(paths[i]))
- .getLastModified();
- if (lastModified != lastModifiedDates[i]) {
- if( log.isDebugEnabled() )
- log.debug(" Resource '" + paths[i]
- + "' was modified; Date is now: "
- + new java.util.Date(lastModified) + " Was: "
- + new java.util.Date(lastModifiedDates[i]));
- return (true);
- }
- } catch (NamingException e) {
- log.error(" Resource '" + paths[i] + "' is missing");
- return (true);
- }
- }
- length = jarNames.length;
- // Check if JARs have been added or removed
- if (getJarPath() != null) {
- try {
- NamingEnumeration enumeration = resources.listBindings(getJarPath());
- int i = 0;
- while (enumeration.hasMoreElements() && (i < length)) {
- NameClassPair ncPair = (NameClassPair) enumeration.nextElement();
- String name = ncPair.getName();
- // Ignore non JARs present in the lib folder
- if (!name.endsWith(".jar"))
- continue;
- if (!name.equals(jarNames[i])) {
- // Missing JAR
- log.info(" Additional JARs have been added : '"
- + name + "'");
- return (true);
- }
- i++;
- }
- if (enumeration.hasMoreElements()) {
- while (enumeration.hasMoreElements()) {
- NameClassPair ncPair =
- (NameClassPair) enumeration.nextElement();
- String name = ncPair.getName();
- // Additional non-JAR files are allowed
- if (name.endsWith(".jar")) {
- // There was more JARs
- log.info(" Additional JARs have been added");
- return (true);
- }
- }
- } else if (i < jarNames.length) {
- // There was less JARs
- log.info(" Additional JARs have been added");
- return (true);
- }
- } catch (NamingException e) {
- if (log.isDebugEnabled())
- log.debug(" Failed tracking modifications of '"
- + getJarPath() + "'");
- } catch (ClassCastException e) {
- log.error(" Failed tracking modifications of '"
- + getJarPath() + "' : " + e.getMessage());
- }
- }
- // No classes have been modified
- return (false);
- }
- /**
- * Render a String representation of this object.
- */
- public String toString() {
- StringBuffer sb = new StringBuffer("WebappClassLoader\r\n");
- sb.append(" delegate: ");
- sb.append(delegate);
- sb.append("\r\n");
- sb.append(" repositories:\r\n");
- if (repositories != null) {
- for (int i = 0; i < repositories.length; i++) {
- sb.append(" ");
- sb.append(repositories[i]);
- sb.append("\r\n");
- }
- }
- if (this.parent != null) {
- sb.append("----------> Parent Classloader:\r\n");
- sb.append(this.parent.toString());
- sb.append("\r\n");
- }
- return (sb.toString());
- }
- // ---------------------------------------------------- ClassLoader Methods
- /**
- * Add the specified URL to the classloader.
- */
- protected void addURL(URL url) {
- super.addURL(url);
- hasExternalRepositories = true;
- repositoryURLs = null;
- }
- /**
- * Find the specified class in our local repositories, if possible. If
- * not found, throw <code>ClassNotFoundException</code>.
- *
- * @param name Name of the class to be loaded
- *
- * @exception ClassNotFoundException if the class was not found
- */
- public Class findClass(String name) throws ClassNotFoundException {
- if (log.isDebugEnabled())
- log.debug(" findClass(" + name + ")");
- // Cannot load anything from local repositories if class loader is stopped
- if (!started) {
- throw new ClassNotFoundException(name);
- }
- // (1) Permission to define this class when using a SecurityManager
- if (securityManager != null) {
- int i = name.lastIndexOf('.');
- if (i >= 0) {
- try {
- if (log.isTraceEnabled())
- log.trace(" securityManager.checkPackageDefinition");
- securityManager.checkPackageDefinition(name.substring(0,i));
- } catch (Exception se) {
- if (log.isTraceEnabled())
- log.trace(" -->Exception-->ClassNotFoundException", se);
- throw new ClassNotFoundException(name, se);
- }
- }
- }
- // Ask our superclass to locate this class, if possible
- // (throws ClassNotFoundException if it is not found)
- Class clazz = null;
- try {
- if (log.isTraceEnabled())
- log.trace(" findClassInternal(" + name + ")");
- try {
- clazz = findClassInternal(name);
- } catch(ClassNotFoundException cnfe) {
- if (!hasExternalRepositories) {
- throw cnfe;
- }
- } catch(AccessControlException ace) {
- throw new ClassNotFoundException(name, ace);
- } catch (RuntimeException e) {
- if (log.isTraceEnabled())
- log.trace(" -->RuntimeException Rethrown", e);
- throw e;
- }
- if ((clazz == null) && hasExternalRepositories) {
- try {
- synchronized (this) {
- clazz = super.findClass(name);
- }
- } catch(AccessControlException ace) {
- throw new ClassNotFoundException(name, ace);
- } catch (RuntimeException e) {
- if (log.isTraceEnabled())
- log.trace(" -->RuntimeException Rethrown", e);
- throw e;
- }
- }
- if (clazz == null) {
- if (log.isDebugEnabled())
- log.debug(" --> Returning ClassNotFoundException");
- throw new ClassNotFoundException(name);
- }
- } catch (ClassNotFoundException e) {
- if (log.isTraceEnabled())
- log.trace(" --> Passing on ClassNotFoundException");
- throw e;
- }
- // Return the class we have located
- if (log.isTraceEnabled())
- log.debug(" Returning class " + clazz);
- if ((log.isTraceEnabled()) && (clazz != null)) {
- ClassLoader cl;
- if (Globals.IS_SECURITY_ENABLED){
- cl = AccessController.doPrivileged(
- new PrivilegedGetClassLoader(clazz));
- } else {
- cl = clazz.getClassLoader();
- }
- log.debug(" Loaded by " + cl.toString());
- }
- return (clazz);
- }
- /**
- * Find the specified resource in our local repository, and return a
- * <code>URL</code> refering to it, or <code>null</code> if this resource
- * cannot be found.
- *
- * @param name Name of the resource to be found
- */
- public URL findResource(final String name) {
- if (log.isDebugEnabled())
- log.debug(" findResource(" + name + ")");
- URL url = null;
- ResourceEntry entry = (ResourceEntry) resourceEntries.get(name);
- if (entry == null) {
- entry = findResourceInternal(name, name);
- }
- if (entry != null) {
- url = entry.source;
- }
- if ((url == null) && hasExternalRepositories)
- url = super.findResource(name);
- if (log.isDebugEnabled()) {
- if (url != null)
- log.debug(" --> Returning '" + url.toString() + "'");
- else
- log.debug(" --> Resource not found, returning null");
- }
- return (url);
- }
- /**
- * Return an enumeration of <code>URLs</code> representing all of the
- * resources with the given name. If no resources with this name are
- * found, return an empty enumeration.
- *
- * @param name Name of the resources to be found
- *
- * @exception IOException if an input/output error occurs
- */
- public Enumeration findResources(String name) throws IOException {
- if (log.isDebugEnabled())
- log.debug(" findResources(" + name + ")");
- Vector result = new Vector();
- int jarFilesLength = jarFiles.length;
- int repositoriesLength = repositories.length;
- int i;
- // Looking at the repositories
- for (i = 0; i < repositoriesLength; i++) {
- try {
- String fullPath = repositories[i] + name;
- resources.lookup(fullPath);
- // Note : Not getting an exception here means the resource was
- // found
- try {
- result.addElement(getURI(new File(files[i], name)));
- } catch (MalformedURLException e) {
- // Ignore
- }
- } catch (NamingException e) {
- }
- }
- // Looking at the JAR files
- synchronized (jarFiles) {
- if (openJARs()) {
- for (i = 0; i < jarFilesLength; i++) {
- JarEntry jarEntry = jarFiles[i].getJarEntry(name);
- if (jarEntry != null) {
- try {
- String jarFakeUrl = getURI(jarRealFiles[i]).toString();
- jarFakeUrl = "jar:" + jarFakeUrl + "!/" + name;
- result.addElement(new URL(jarFakeUrl));
- } catch (MalformedURLException e) {
- // Ignore
- }
- }
- }
- }
- }
- // Adding the results of a call to the superclass
- if (hasExternalRepositories) {
- Enumeration otherResourcePaths = super.findResources(name);
- while (otherResourcePaths.hasMoreElements()) {
- result.addElement(otherResourcePaths.nextElement());
- }
- }
- return result.elements();
- }
- /**
- * Find the resource with the given name. A resource is some data
- * (images, audio, text, etc.) that can be accessed by class code in a
- * way that is independent of the location of the code. The name of a
- * resource is a "/"-separated path name that identifies the resource.
- * If the resource cannot be found, return <code>null</code>.
- * <p>
- * This method searches according to the following algorithm, returning
- * as soon as it finds the appropriate URL. If the resource cannot be
- * found, returns <code>null</code>.
- * <ul>
- * <li>If the <code>delegate</code> property is set to <code>true</code>,
- * call the <code>getResource()</code> method of the parent class
- * loader, if any.</li>
- * <li>Call <code>findResource()</code> to find this resource in our
- * locally defined repositories.</li>
- * <li>Call the <code>getResource()</code> method of the parent class
- * loader, if any.</li>
- * </ul>
- *
- * @param name Name of the resource to return a URL for
- */
- public URL getResource(String name) {
- if (log.isDebugEnabled())
- log.debug("getResource(" + name + ")");
- URL url = null;
- // (1) Delegate to parent if requested
- if (delegate) {
- if (log.isDebugEnabled())
- log.debug(" Delegating to parent classloader " + parent);
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- url = loader.getResource(name);
- if (url != null) {
- if (log.isDebugEnabled())
- log.debug(" --> Returning '" + url.toString() + "'");
- return (url);
- }
- }
- // (2) Search local repositories
- url = findResource(name);
- if (url != null) {
- // Locating the repository for special handling in the case
- // of a JAR
- if (antiJARLocking) {
- ResourceEntry entry = (ResourceEntry) resourceEntries.get(name);
- try {
- String repository = entry.codeBase.toString();
- if ((repository.endsWith(".jar"))
- && (!(name.endsWith(".class")))) {
- // Copy binary content to the work directory if not present
- File resourceFile = new File(loaderDir, name);
- url = getURI(resourceFile);
- }
- } catch (Exception e) {
- // Ignore
- }
- }
- if (log.isDebugEnabled())
- log.debug(" --> Returning '" + url.toString() + "'");
- return (url);
- }
- // (3) Delegate to parent unconditionally if not already attempted
- if( !delegate ) {
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- url = loader.getResource(name);
- if (url != null) {
- if (log.isDebugEnabled())
- log.debug(" --> Returning '" + url.toString() + "'");
- return (url);
- }
- }
- // (4) Resource was not found
- if (log.isDebugEnabled())
- log.debug(" --> Resource not found, returning null");
- return (null);
- }
- /**
- * Find the resource with the given name, and return an input stream
- * that can be used for reading it. The search order is as described
- * for <code>getResource()</code>, after checking to see if the resource
- * data has been previously cached. If the resource cannot be found,
- * return <code>null</code>.
- *
- * @param name Name of the resource to return an input stream for
- */
- public InputStream getResourceAsStream(String name) {
- if (log.isDebugEnabled())
- log.debug("getResourceAsStream(" + name + ")");
- InputStream stream = null;
- // (0) Check for a cached copy of this resource
- stream = findLoadedResource(name);
- if (stream != null) {
- if (log.isDebugEnabled())
- log.debug(" --> Returning stream from cache");
- return (stream);
- }
- // (1) Delegate to parent if requested
- if (delegate) {
- if (log.isDebugEnabled())
- log.debug(" Delegating to parent classloader " + parent);
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- stream = loader.getResourceAsStream(name);
- if (stream != null) {
- // FIXME - cache???
- if (log.isDebugEnabled())
- log.debug(" --> Returning stream from parent");
- return (stream);
- }
- }
- // (2) Search local repositories
- if (log.isDebugEnabled())
- log.debug(" Searching local repositories");
- URL url = findResource(name);
- if (url != null) {
- // FIXME - cache???
- if (log.isDebugEnabled())
- log.debug(" --> Returning stream from local");
- stream = findLoadedResource(name);
- try {
- if (hasExternalRepositories && (stream == null))
- stream = url.openStream();
- } catch (IOException e) {
- ; // Ignore
- }
- if (stream != null)
- return (stream);
- }
- // (3) Delegate to parent unconditionally
- if (!delegate) {
- if (log.isDebugEnabled())
- log.debug(" Delegating to parent classloader unconditionally " + parent);
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- stream = loader.getResourceAsStream(name);
- if (stream != null) {
- // FIXME - cache???
- if (log.isDebugEnabled())
- log.debug(" --> Returning stream from parent");
- return (stream);
- }
- }
- // (4) Resource was not found
- if (log.isDebugEnabled())
- log.debug(" --> Resource not found, returning null");
- return (null);
- }
- /**
- * Load the class with the specified name. This method searches for
- * classes in the same manner as <code>loadClass(String, boolean)</code>
- * with <code>false</code> as the second argument.
- *
- * @param name Name of the class to be loaded
- *
- * @exception ClassNotFoundException if the class was not found
- */
- public Class loadClass(String name) throws ClassNotFoundException {
- return (loadClass(name, false));
- }
- /**
- * Load the class with the specified name, searching using the following
- * algorithm until it finds and returns the class. If the class cannot
- * be found, returns <code>ClassNotFoundException</code>.
- * <ul>
- * <li>Call <code>findLoadedClass(String)</code> to check if the
- * class has already been loaded. If it has, the same
- * <code>Class</code> object is returned.</li>
- * <li>If the <code>delegate</code> property is set to <code>true</code>,
- * call the <code>loadClass()</code> method of the parent class
- * loader, if any.</li>
- * <li>Call <code>findClass()</code> to find this class in our locally
- * defined repositories.</li>
- * <li>Call the <code>loadClass()</code> method of our parent
- * class loader, if any.</li>
- * </ul>
- * If the class was found using the above steps, and the
- * <code>resolve</code> flag is <code>true</code>, this method will then
- * call <code>resolveClass(Class)</code> on the resulting Class object.
- *
- * @param name Name of the class to be loaded
- * @param resolve If <code>true</code> then resolve the class
- *
- * @exception ClassNotFoundException if the class was not found
- */
- public Class loadClass(String name, boolean resolve)
- throws ClassNotFoundException {
- if (log.isDebugEnabled())
- log.debug("loadClass(" + name + ", " + resolve + ")");
- Class clazz = null;
- // Log access to stopped classloader
- if (!started) {
- try {
- throw new IllegalStateException();
- } catch (IllegalStateException e) {
- log.info(sm.getString("webappClassLoader.stopped", name), e);
- }
- }
- // (0) Check our previously loaded local class cache
- clazz = findLoadedClass0(name);
- if (clazz != null) {
- if (log.isDebugEnabled())
- log.debug(" Returning class from cache");
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- // (0.1) Check our previously loaded class cache
- clazz = findLoadedClass(name);
- if (clazz != null) {
- if (log.isDebugEnabled())
- log.debug(" Returning class from cache");
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- // (0.2) Try loading the class with the system class loader, to prevent
- // the webapp from overriding J2SE classes
- try {
- clazz = system.loadClass(name);
- if (clazz != null) {
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- } catch (ClassNotFoundException e) {
- // Ignore
- }
- // (0.5) Permission to access this class when using a SecurityManager
- if (securityManager != null) {
- int i = name.lastIndexOf('.');
- if (i >= 0) {
- try {
- securityManager.checkPackageAccess(name.substring(0,i));
- } catch (SecurityException se) {
- String error = "Security Violation, attempt to use " +
- "Restricted Class: " + name;
- log.info(error, se);
- throw new ClassNotFoundException(error, se);
- }
- }
- }
- boolean delegateLoad = delegate || filter(name);
- // (1) Delegate to our parent if requested
- if (delegateLoad) {
- if (log.isDebugEnabled())
- log.debug(" Delegating to parent classloader1 " + parent);
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- try {
- clazz = loader.loadClass(name);
- if (clazz != null) {
- if (log.isDebugEnabled())
- log.debug(" Loading class from parent");
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- } catch (ClassNotFoundException e) {
- ;
- }
- }
- // (2) Search local repositories
- if (log.isDebugEnabled())
- log.debug(" Searching local repositories");
- try {
- clazz = findClass(name);
- if (clazz != null) {
- if (log.isDebugEnabled())
- log.debug(" Loading class from local repository");
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- } catch (ClassNotFoundException e) {
- ;
- }
- // (3) Delegate to parent unconditionally
- if (!delegateLoad) {
- if (log.isDebugEnabled())
- log.debug(" Delegating to parent classloader at end: " + parent);
- ClassLoader loader = parent;
- if (loader == null)
- loader = system;
- try {
- clazz = loader.loadClass(name);
- if (clazz != null) {
- if (log.isDebugEnabled())
- log.debug(" Loading class from parent");
- if (resolve)
- resolveClass(clazz);
- return (clazz);
- }
- } catch (ClassNotFoundException e) {
- ;
- }
- }
- throw new ClassNotFoundException(name);
- }
- /**
- * Get the Permissions for a CodeSource. If this instance
- * of WebappClassLoader is for a web application context,
- * add read FilePermission or JndiPermissions for the base
- * directory (if unpacked),
- * the context URL, and jar file resources.
- *
- * @param codeSource where the code was loaded from
- * @return PermissionCollection for CodeSource
- */
- protected PermissionCollection getPermissions(CodeSource codeSource) {
- String codeUrl = codeSource.getLocation().toString();
- PermissionCollection pc;
- if ((pc = (PermissionCollection)loaderPC.get(codeUrl)) == null) {
- pc = super.getPermissions(codeSource);
- if (pc != null) {
- Iterator perms = permissionList.iterator();
- while (perms.hasNext()) {
- Permission p = (Permission)perms.next();
- pc.add(p);
- }
- loaderPC.put(codeUrl,pc);
- }
- }
- return (pc);
- }
- /**
- * Returns the search path of URLs for loading classes and resources.
- * This includes the original list of URLs specified to the constructor,
- * along with any URLs subsequently appended by the addURL() method.
- * @return the search path of URLs for loading classes and resources.
- */
- public URL[] getURLs() {
- if (repositoryURLs != null) {
- return repositoryURLs;
- }
- URL[] external = super.getURLs();
- int filesLength = files.length;
- int jarFilesLength = jarRealFiles.length;
- int length = filesLength + jarFilesLength + external.length;
- int i;
- try {
- URL[] urls = new URL[length];
- for (i = 0; i < length; i++) {
- if (i < filesLength) {
- urls[i] = getURL(files[i], true);
- } else if (i < filesLength + jarFilesLength) {
- urls[i] = getURL(jarRealFiles[i - filesLength], true);
- } else {
- urls[i] = external[i - filesLength - jarFilesLength];
- }
- }
- repositoryURLs = urls;
- } catch (MalformedURLException e) {
- repositoryURLs = new URL[0];
- }
- return repositoryURLs;
- }
- // ------------------------------------------------------ Lifecycle Methods
- /**
- * Add a lifecycle event listener to this component.
- *
- * @param listener The listener to add
- */
- public void addLifecycleListener(LifecycleListener listener) {
- }
- /**
- * Get the lifecycle listeners associated with this lifecycle. If this
- * Lifecycle has no listeners registered, a zero-length array is returned.
- */
- public LifecycleListener[] findLifecycleListeners() {
- return new LifecycleListener[0];
- }
- /**
- * Remove a lifecycle event listener from this component.
- *
- * @param listener The listener to remove
- */
- public void removeLifecycleListener(LifecycleListener listener) {
- }
- /**
- * Start the class loader.
- *
- * @exception LifecycleException if a lifecycle error occurs
- */
- public void start() throws LifecycleException {
- started = true;
- String encoding = null;
- try {
- encoding = System.getProperty("file.encoding");
- } catch (Exception e) {
- return;
- }
- if (encoding.indexOf("EBCDIC")!=-1) {
- needConvert = true;
- }
- }
- /**
- * Stop the class loader.
- *
- * @exception LifecycleException if a lifecycle error occurs
- */
- public void stop() throws LifecycleException {
- // Clearing references should be done before setting started to
- // false, due to possible side effects
- clearReferences();
- started = false;
- int length = files.length;
- for (int i = 0; i < length; i++) {
- files[i] = null;
- }
- length = jarFiles.length;
- for (int i = 0; i < length; i++) {
- try {
- if (jarFiles[i] != null) {
- jarFiles[i].close();
- }
- } catch (IOException e) {
- // Ignore
- }
- jarFiles[i] = null;
- }
- notFoundResources.clear();
- resourceEntries.clear();
- resources = null;
- repositories = null;
- repositoryURLs = null;
- files = null;
- jarFiles = null;
- jarRealFiles = null;
- jarPath = null;
- jarNames = null;
- lastModifiedDates = null;
- paths = null;
- hasExternalRepositories = false;
- parent = null;
- permissionList.clear();
- loaderPC.clear();
- if (loaderDir != null) {
- deleteDir(loaderDir);
- }
- }
- /**
- * Used to periodically signal to the classloader to release
- * JAR resources.
- */
- public void closeJARs(boolean force) {
- if (jarFiles.length > 0) {
- synchronized (jarFiles) {
- if (force || (System.currentTimeMillis()
- > (lastJarAccessed + 90000))) {
- for (int i = 0; i < jarFiles.length; i++) {
- try {
- if (jarFiles[i] != null) {
- jarFiles[i].close();
- jarFiles[i] = null;
- }
- } catch (IOException e) {
- if (log.isDebugEnabled()) {
- log.debug("Failed to close JAR", e);
- }
- }
- }
- }
- }
- }
- }
- // ------------------------------------------------------ Protected Methods
- /**
- * Clear references.
- */
- protected void clearReferences() {
- // Unregister any JDBC drivers loaded by this classloader
- Enumeration drivers = DriverManager.getDrivers();
- while (drivers.hasMoreElements()) {
- Driver driver = (Driver) drivers.nextElement();
- if (driver.getClass().getClassLoader() == this) {
- try {
- DriverManager.deregisterDriver(driver);
- } catch (SQLException e) {
- log.warn("SQL driver deregistration failed", e);
- }
- }
- }
- // Null out any static or final fields from loaded classes,
- // as a workaround for apparent garbage collection bugs
- if (ENABLE_CLEAR_REFERENCES) {
- Iterator loadedClasses = ((HashMap) resourceEntries.clone()).values().iterator();
- while (loadedClasses.hasNext()) {
- ResourceEntry entry = (ResourceEntry) loadedClasses.next();
- if (entry.loadedClass != null) {
- Class clazz = entry.loadedClass;
- try {
- Field[] fields = clazz.getDeclaredFields();
- for (int i = 0; i < fields.length; i++) {
- Field field = fields[i];
- int mods = field.getModifiers();
- if (field.getType().isPrimitive()
- || (field.getName().indexOf("$") != -1)) {
- continue;
- }
- if (Modifier.isStatic(mods)) {
- try {
- field.setAccessible(true);
- if (Modifier.isFinal(mods)) {
- if (!((field.getType().getName().startsWith("java."))
- || (field.getType().getName().startsWith("javax.")))) {
- nullInstance(field.get(null));
- }
- } else {
- field.set(null, null);
- if (log.isDebugEnabled()) {
- log.debug("Set field " + field.getName()
- + " to null in class " + clazz.getName());
- }
- }
- } catch (Throwable t) {
- if (log.isDebugEnabled()) {
- log.debug("Could not set field " + field.getName()
- + " to null in class " + clazz.getName(), t);
- }
- }
- }
- }
- } catch (Throwable t) {
- if (log.isDebugEnabled()) {
- log.debug("Could not clean fields for class " + clazz.getName(), t);
- }
- }
- }
- }
- }
- // Clear the IntrospectionUtils cache.
- IntrospectionUtils.clear();
- // Clear the classloader reference in common-logging
- org.apache.juli.logging.LogFactory.release(this);
- // Clear the classloader reference in the VM's bean introspector
- java.beans.Introspector.flushCaches();
- }
- protected void nullInstance(Object instance) {
- if (instance == null) {
- return;
- }
- Field[] fields = instance.getClass().getDeclaredFields();
- for (int i = 0; i < fields.length; i++) {
- Field field = fields[i];
- int mods = field.getModifiers();
- if (field.getType().isPrimitive()
- || (field.getName().indexOf("$") != -1)) {
- continue;
- }
- try {
- field.setAccessible(true);
- if (Modifier.isStatic(mods) && Modifier.isFinal(mods)) {
- // Doing something recursively is too risky
- continue;
- } else {
- Object value = field.get(instance);
- if (null != value) {
- Class valueClass = value.getClass();
- if (!loadedByThisOrChild(valueClass)) {
- if (log.isDebugEnabled()) {
- log.debug("Not setting field " + field.getName() +
- " to null in object of class " +
- instance.getClass().getName() +
- " because the referenced object was of type " +
- valueClass.getName() +
- " which was not loaded by this WebappClassLoader.");
- }
- } else {
- field.set(instance, null);
- if (log.isDebugEnabled()) {
- log.debug("Set field " + field.getName()
- + " to null in class " + instance.getClass().getName());
- }
- }
- }
- }
- } catch (Throwable t) {
- if (log.isDebugEnabled()) {
- log.debug("Could not set field " + field.getName()
- + " to null in object instance of class "
- + instance.getClass().getName(), t);
- }
- }
- }
- }
- /**
- * Determine whether a class was loaded by this class loader or one of
- * its child class loaders.
- */
- protected boolean loadedByThisOrChild(Class clazz)
- {
- boolean result = false;
- for (ClassLoader classLoader = clazz.getClassLoader();
- null != classLoader; classLoader = classLoader.getParent()) {
- if (classLoader.equals(this)) {
- result = true;
- break;
- }
- }
- return result;
- }
- /**
- * Used to periodically signal to the classloader to release JAR resources.
- */
- protected boolean openJARs() {
- if (started && (jarFiles.length > 0)) {
- lastJarAccessed = System.currentTimeMillis();
- if (jarFiles[0] == null) {
- for (int i = 0; i < jarFiles.length; i++) {
- try {
- jarFiles[i] = new JarFile(jarRealFiles[i]);
- } catch (IOException e) {
- if (log.isDebugEnabled()) {
- log.debug("Failed to open JAR", e);
- }
- return false;
- }
- }
- }
- }
- return true;
- }
- /**
- * Find specified class in local repositories.
- *
- * @return the loaded class, or null if the class isn't found
- */
- protected Class findClassInternal(String name)
- throws ClassNotFoundException {
- if (!validate(name))
- throw new ClassNotFoundException(name);
- String tempPath = name.replace('.', '/');
- String classPath = tempPath + ".class";
- ResourceEntry entry = null;
- entry = findResourceInternal(name, classPath);
- if (entry == null)
- throw new ClassNotFoundException(name);
- Class clazz = entry.loadedClass;
- if (clazz != null)
- return clazz;
- synchronized (this) {
- clazz = entry.loadedClass;
- if (clazz != null)
- return clazz;
- if (entry.binaryContent == null)
- throw new ClassNotFoundException(name);
- // Looking up the package
- String packageName = null;
- int pos = name.lastIndexOf('.');
- if (pos != -1)
- packageName = name.substring(0, pos);
- Package pkg = null;
- if (packageName != null) {
- pkg = getPackage(packageName);
- // Define the package (if null)
- if (pkg == null) {
- try {
- if (entry.manifest == null) {
- definePackage(packageName, null, null, null, null,
- null, null, null);
- } else {
- definePackage(packageName, entry.manifest,
- entry.codeBase);
- }
- } catch (IllegalArgumentException e) {
- // Ignore: normal error due to dual definition of package
- }
- pkg = getPackage(packageName);
- }
- }
- if (securityManager != null) {
- // Checking sealing
- if (pkg != null) {
- boolean sealCheck = true;
- if (pkg.isSealed()) {
- sealCheck = pkg.isSealed(entry.codeBase);
- } else {
- sealCheck = (entry.manifest == null)
- || !isPackageSealed(packageName, entry.manifest);
- }
- if (!sealCheck)
- throw new SecurityException
- ("Sealing violation loading " + name + " : Package "
- + packageName + " is sealed.");
- }
- }
- try {
- clazz = defineClass(name, entry.binaryContent, 0,
- entry.binaryContent.length,
- new CodeSource(entry.codeBase, entry.certificates));
- } catch (UnsupportedClassVersionError ucve) {
- throw new UnsupportedClassVersionError(
- ucve.getLocalizedMessage() + " " +
- sm.getString("webappClassLoader.wrongVersion",
- name));
- }
- entry.loadedClass = clazz;
- entry.binaryContent = null;
- entry.source = null;
- entry.codeBase = null;
- entry.manifest = null;
- entry.certificates = null;
- }
- return clazz;
- }
- /**
- * Find specified resource in local repositories. This block
- * will execute under an AccessControl.doPrivilege block.
- *
- * @return the loaded resource, or null if the resource isn't found
- */
- protected ResourceEntry findResourceInternal(File file, String path){
- ResourceEntry entry = new ResourceEntry();
- try {
- entry.source = getURI(new File(file, path));
- entry.codeBase = getURL(new File(file, path), false);
- } catch (MalformedURLException e) {
- return null;
- }
- return entry;
- }
- /**
- * Find specified resource in local repositories.
- *
- * @return the loaded resource, or null if the resource isn't found
- */
- protected ResourceEntry findResourceInternal(String name, String path) {
- if (!started) {
- log.info(sm.getString("webappClassLoader.stopped", name));
- return null;
- }
- if ((name == null) || (path == null))
- return null;
- ResourceEntry entry = (ResourceEntry) resourceEntries.get(name);
- if (entry != null)
- return entry;
- int contentLength = -1;
- InputStream binaryStream = null;
- int jarFilesLength = jarFiles.length;
- int repositoriesLength = repositories.length;
- int i;
- Resource resource = null;
- boolean fileNeedConvert = false;
- for (i = 0; (entry == null) && (i < repositoriesLength); i++) {
- try {
- String fullPath = repositories[i] + path;
- Object lookupResult = resources.lookup(fullPath);
- if (lookupResult instanceof Resource) {
- resource = (Resource) lookupResult;
- }
- // Note : Not getting an exception here means the resource was
- // found
- if (securityManager != null) {
- PrivilegedAction dp =
- new PrivilegedFindResource(files[i], path);
- entry = (ResourceEntry)AccessController.doPrivileged(dp);
- } else {
- entry = findResourceInternal(files[i], path);
- }
- ResourceAttributes attributes =
- (ResourceAttributes) resources.getAttributes(fullPath);
- contentLength = (int) attributes.getContentLength();
- entry.lastModified = attributes.getLastModified();
- if (resource != null) {
- try {
- binaryStream = resource.streamContent();
- } catch (IOException e) {
- return null;
- }
- if (needConvert) {
- if (path.endsWith(".properties")) {
- fileNeedConvert = true;
- }
- }
- // Register the full path for modification checking
- // Note: Only syncing on a 'constant' object is needed
- synchronized (allPermission) {
- int j;
- long[] result2 =
- new long[lastModifiedDates.length + 1];
- for (j = 0; j < lastModifiedDates.length; j++) {
- result2[j] = lastModifiedDates[j];
- }
- result2[lastModifiedDates.length] = entry.lastModified;
- lastModifiedDates = result2;
- String[] result = new String[paths.length + 1];
- for (j = 0; j < paths.length; j++) {
- result[j] = paths[j];
- }
- result[paths.length] = fullPath;
- paths = result;
- }
- }
- } catch (NamingException e) {
- }
- }
- if ((entry == null) && (notFoundResources.containsKey(name)))
- return null;
- JarEntry jarEntry = null;
- synchronized (jarFiles) {
- if (!openJARs()) {
- return null;
- }
- for (i = 0; (entry == null) && (i < jarFilesLength); i++) {
- jarEntry = jarFiles[i].getJarEntry(path);
- if (jarEntry != null) {
- entry = new ResourceEntry();
- try {
- entry.codeBase = getURL(jarRealFiles[i], false);
- String jarFakeUrl = getURI(jarRealFiles[i]).toString();
- jarFakeUrl = "jar:" + jarFakeUrl + "!/" + path;
- entry.source = new URL(jarFakeUrl);
- entry.lastModified = jarRealFiles[i].lastModified();
- } catch (MalformedURLException e) {
- return null;
- }
- contentLength = (int) jarEntry.getSize();
- try {
- entry.manifest = jarFiles[i].getManifest();
- binaryStream = jarFiles[i].getInputStream(jarEntry);
- } catch (IOException e) {
- return null;
- }
- // Extract resources contained in JAR to the workdir
- if (antiJARLocking && !(path.endsWith(".class"))) {
- byte[] buf = new byte[1024];
- File resourceFile = new File
- (loaderDir, jarEntry.getName());
- if (!resourceFile.exists()) {
- Enumeration entries = jarFiles[i].entries();
- while (entries.hasMoreElements()) {
- JarEntry jarEntry2 =
- (JarEntry) entries.nextElement();
- if (!(jarEntry2.isDirectory())
- && (!jarEntry2.getName().endsWith
- (".class"))) {
- resourceFile = new File
- (loaderDir, jarEntry2.getName());
- resourceFile.getParentFile().mkdirs();
- FileOutputStream os = null;
- InputStream is = null;
- try {
- is = jarFiles[i].getInputStream
- (jarEntry2);
- os = new FileOutputStream
- (resourceFile);
- while (true) {
- int n = is.read(buf);
- if (n <= 0) {
- break;
- }
- os.write(buf, 0, n);
- }
- } catch (IOException e) {
- // Ignore
- } finally {
- try {
- if (is != null) {
- is.close();
- }
- } catch (IOException e) {
- }
- try {
- if (os != null) {
- os.close();
- }
- } catch (IOException e) {
- }
- }
- }
- }
- }
- }
- }
- }
- if (entry == null) {
- synchronized (notFoundResources) {
- notFoundResources.put(name, name);
- }
- return null;
- }
- if (binaryStream != null) {
- byte[] binaryContent = new byte[contentLength];
- int pos = 0;
- try {
- while (true) {
- int n = binaryStream.read(binaryContent, pos,
- binaryContent.length - pos);
- if (n <= 0)
- break;
- pos += n;
- }
- binaryStream.close();
- } catch (IOException e) {
- e.printStackTrace();
- return null;
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- if (fileNeedConvert) {
- String str = new String(binaryContent,0,pos);
- try {
- binaryContent = str.getBytes("UTF-8");
- } catch (Exception e) {
- return null;
- }
- }
- entry.binaryContent = binaryContent;
- // The certificates are only available after the JarEntry
- // associated input stream has been fully read
- if (jarEntry != null) {
- entry.certificates = jarEntry.getCertificates();
- }
- }
- }
- // Add the entry in the local resource repository
- synchronized (resourceEntries) {
- // Ensures that all the threads which may be in a race to load
- // a particular class all end up with the same ResourceEntry
- // instance
- ResourceEntry entry2 = (ResourceEntry) resourceEntries.get(name);
- if (entry2 == null) {
- resourceEntries.put(name, entry);
- } else {
- entry = entry2;
- }
- }
- return entry;
- }
- /**
- * Returns true if the specified package name is sealed according to the
- * given manifest.
- */
- protected boolean isPackageSealed(String name, Manifest man) {
- String path = name.replace('.', '/') + '/';
- Attributes attr = man.getAttributes(path);
- String sealed = null;
- if (attr != null) {
- sealed = attr.getValue(Name.SEALED);
- }
- if (sealed == null) {
- if ((attr = man.getMainAttributes()) != null) {
- sealed = attr.getValue(Name.SEALED);
- }
- }
- return "true".equalsIgnoreCase(sealed);
- }
- /**
- * Finds the resource with the given name if it has previously been
- * loaded and cached by this class loader, and return an input stream
- * to the resource data. If this resource has not been cached, return
- * <code>null</code>.
- *
- * @param name Name of the resource to return
- */
- protected InputStream findLoadedResource(String name) {
- ResourceEntry entry = (ResourceEntry) resourceEntries.get(name);
- if (entry != null) {
- if (entry.binaryContent != null)
- return new ByteArrayInputStream(entry.binaryContent);
- }
- return (null);
- }
- /**
- * Finds the class with the given name if it has previously been
- * loaded and cached by this class loader, and return the Class object.
- * If this class has not been cached, return <code>null</code>.
- *
- * @param name Name of the resource to return
- */
- protected Class findLoadedClass0(String name) {
- ResourceEntry entry = (ResourceEntry) resourceEntries.get(name);
- if (entry != null) {
- return entry.loadedClass;
- }
- return (null); // FIXME - findLoadedResource()
- }
- /**
- * Refresh the system policy file, to pick up eventual changes.
- */
- protected void refreshPolicy() {
- try {
- // The policy file may have been modified to adjust
- // permissions, so we're reloading it when loading or
- // reloading a Context
- Policy policy = Policy.getPolicy();
- policy.refresh();
- } catch (AccessControlException e) {
- // Some policy files may restrict this, even for the core,
- // so this exception is ignored
- }
- }
- /**
- * Filter classes.
- *
- * @param name class name
- * @return true if the class should be filtered
- */
- protected boolean filter(String name) {
- if (name == null)
- return false;
- // Looking up the package
- String packageName = null;
- int pos = name.lastIndexOf('.');
- if (pos != -1)
- packageName = name.substring(0, pos);
- else
- return false;
- for (int i = 0; i < packageTriggers.length; i++) {
- if (packageName.startsWith(packageTriggers[i]))
- return true;
- }
- return false;
- }
- /**
- * Validate a classname. As per SRV.9.7.2, we must restict loading of
- * classes from J2SE (java.*) and classes of the servlet API
- * (javax.servlet.*). That should enhance robustness and prevent a number
- * of user error (where an older version of servlet.jar would be present
- * in /WEB-INF/lib).
- *
- * @param name class name
- * @return true if the name is valid
- */
- protected boolean validate(String name) {
- if (name == null)
- return false;
- if (name.startsWith("java."))
- return false;
- return true;
- }
- /**
- * Check the specified JAR file, and return <code>true</code> if it does
- * not contain any of the trigger classes.
- *
- * @param jarfile The JAR file to be checked
- *
- * @exception IOException if an input/output error occurs
- */
- protected boolean validateJarFile(File jarfile)
- throws IOException {
- if (triggers == null)
- return (true);
- JarFile jarFile = new JarFile(jarfile);
- for (int i = 0; i < triggers.length; i++) {
- Class clazz = null;
- try {
- if (parent != null) {
- clazz = parent.loadClass(triggers[i]);
- } else {
- clazz = Class.forName(triggers[i]);
- }
- } catch (Throwable t) {
- clazz = null;
- }
- if (clazz == null)
- continue;
- String name = triggers[i].replace('.', '/') + ".class";
- if (log.isDebugEnabled())
- log.debug(" Checking for " + name);
- JarEntry jarEntry = jarFile.getJarEntry(name);
- if (jarEntry != null) {
- log.info("validateJarFile(" + jarfile +
- ") - jar not loaded. See Servlet Spec 2.3, "
- + "section 9.7.2. Offending class: " + name);
- jarFile.close();
- return (false);
- }
- }
- jarFile.close();
- return (true);
- }
- /**
- * Get URL.
- */
- protected URL getURL(File file, boolean encoded)
- throws MalformedURLException {
- File realFile = file;
- try {
- realFile = realFile.getCanonicalFile();
- } catch (IOException e) {
- // Ignore
- }
- if(encoded) {
- return getURI(realFile);
- } else {
- return realFile.toURL();
- }
- }
- /**
- * Get URL.
- */
- protected URL getURI(File file)
- throws MalformedURLException {
- File realFile = file;
- try {
- realFile = realFile.getCanonicalFile();
- } catch (IOException e) {
- // Ignore
- }
- return realFile.toURI().toURL();
- }
- /**
- * Delete the specified directory, including all of its contents and
- * subdirectories recursively.
- *
- * @param dir File object representing the directory to be deleted
- */
- protected static void deleteDir(File dir) {
- String files[] = dir.list();
- if (files == null) {
- files = new String[0];
- }
- for (int i = 0; i < files.length; i++) {
- File file = new File(dir, files[i]);
- if (file.isDirectory()) {
- deleteDir(file);
- } else {
- file.delete();
- }
- }
- dir.delete();
- }
- }
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