/*

 * 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.core;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.ObjectOutputStream;

import java.io.Serializable;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.Map;

import java.util.Stack;

import java.util.TreeMap;

import javax.management.AttributeNotFoundException;

import javax.management.ListenerNotFoundException;

import javax.management.MBeanNotificationInfo;

import javax.management.MBeanRegistrationException;

import javax.management.MBeanServer;

import javax.management.MalformedObjectNameException;

import javax.management.Notification;

import javax.management.NotificationBroadcasterSupport;

import javax.management.NotificationEmitter;

import javax.management.NotificationFilter;

import javax.management.NotificationListener;

import javax.management.ObjectName;

import javax.naming.NamingException;

import javax.naming.directory.DirContext;

import javax.servlet.FilterConfig;

import javax.servlet.ServletContext;

import javax.servlet.ServletContextAttributeListener;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

import javax.servlet.ServletException;

import javax.servlet.ServletRequestAttributeListener;

import javax.servlet.ServletRequestListener;

import javax.servlet.http.HttpSessionAttributeListener;

import javax.servlet.http.HttpSessionListener;

import org.apache.AnnotationProcessor;

import org.apache.catalina.Container;

import org.apache.catalina.ContainerListener;

import org.apache.catalina.Context;

import org.apache.catalina.Engine;

import org.apache.catalina.Globals;

import org.apache.catalina.Host;

import org.apache.catalina.InstanceListener;

import org.apache.catalina.Lifecycle;

import org.apache.catalina.LifecycleException;

import org.apache.catalina.LifecycleListener;

import org.apache.catalina.Loader;

import org.apache.catalina.Manager;

import org.apache.catalina.Wrapper;

import org.apache.catalina.deploy.ApplicationParameter;

import org.apache.catalina.deploy.ErrorPage;

import org.apache.catalina.deploy.FilterDef;

import org.apache.catalina.deploy.FilterMap;

import org.apache.catalina.deploy.LoginConfig;

import org.apache.catalina.deploy.MessageDestination;

import org.apache.catalina.deploy.MessageDestinationRef;

import org.apache.catalina.deploy.NamingResources;

import org.apache.catalina.deploy.SecurityCollection;

import org.apache.catalina.deploy.SecurityConstraint;

import org.apache.catalina.loader.WebappLoader;

import org.apache.catalina.session.StandardManager;

import org.apache.catalina.startup.ContextConfig;

import org.apache.catalina.startup.TldConfig;

import org.apache.catalina.util.CharsetMapper;

import org.apache.catalina.util.DefaultAnnotationProcessor;

import org.apache.catalina.util.ExtensionValidator;

import org.apache.catalina.util.RequestUtil;

import org.apache.catalina.util.URLEncoder;

import org.apache.juli.logging.Log;

import org.apache.juli.logging.LogFactory;

import org.apache.naming.ContextBindings;

import org.apache.naming.resources.BaseDirContext;

import org.apache.naming.resources.DirContextURLStreamHandler;

import org.apache.naming.resources.FileDirContext;

import org.apache.naming.resources.ProxyDirContext;

import org.apache.naming.resources.WARDirContext;

import org.apache.tomcat.util.modeler.Registry;

/**

 * Standard implementation of the <b>Context</b> interface.  Each

 * child container must be a Wrapper implementation to process the

 * requests directed to a particular servlet.

 *

 * @author Craig R. McClanahan

 * @author Remy Maucherat

 */

public class StandardContext

    extends ContainerBase

    implements Context, Serializable, NotificationEmitter

{

    private static transient Log log = LogFactory.getLog(StandardContext.class);

    // ----------------------------------------------------------- Constructors

    /**

     * Create a new StandardContext component with the default basic Valve.

     */

    public StandardContext() {

        super();

        pipeline.setBasic(new StandardContextValve());

        broadcaster = new NotificationBroadcasterSupport();

    }

    // ----------------------------------------------------- Class Variables

    /**

     * The descriptive information string for this implementation.

     */

    private static final String info =

        "org.apache.catalina.core.StandardContext/1.0";

    /**

     * Array containing the safe characters set.

     */

    protected static URLEncoder urlEncoder;

    /**

     * GMT timezone - all HTTP dates are on GMT

     */

    static {

        urlEncoder = new URLEncoder();

        urlEncoder.addSafeCharacter('~');

        urlEncoder.addSafeCharacter('-');

        urlEncoder.addSafeCharacter('_');

        urlEncoder.addSafeCharacter('.');

        urlEncoder.addSafeCharacter('*');

        urlEncoder.addSafeCharacter('/');

    }

    // ----------------------------------------------------- Instance Variables

    /**

     * The alternate deployment descriptor name.

     */

    private String altDDName = null;

    /**

     * Annotation processor.

     */

    private AnnotationProcessor annotationProcessor = null;

   /**

     * Associated host name.

     */

    private String hostName;

    /**

     * The antiJARLocking flag for this Context.

     */

    private boolean antiJARLocking = false;

    /**

     * The antiResourceLocking flag for this Context.

     */

    private boolean antiResourceLocking = false;

    /**

     * The set of application listener class names configured for this

     * application, in the order they were encountered in the web.xml file.

     */

    private String applicationListeners[] = new String[0];

    private final Object applicationListenersLock = new Object();

    /**

     * The set of instantiated application event listener objects</code>.

     */

    private transient Object applicationEventListenersObjects[] = 

        new Object[0];

    /**

     * The set of instantiated application lifecycle listener objects</code>.

     */

    private transient Object applicationLifecycleListenersObjects[] = 

        new Object[0];

    /**

     * The set of application parameters defined for this application.

     */

    private ApplicationParameter applicationParameters[] =

        new ApplicationParameter[0];

    private final Object applicationParametersLock = new Object();

    /**

     * The application available flag for this Context.

     */

    private boolean available = false;

    /**

     * The broadcaster that sends j2ee notifications. 

     */

    private NotificationBroadcasterSupport broadcaster = null;

    /**

     * The Locale to character set mapper for this application.

     */

    private transient CharsetMapper charsetMapper = null;

    /**

     * The Java class name of the CharsetMapper class to be created.

     */

    private String charsetMapperClass =

      "org.apache.catalina.util.CharsetMapper";

    /**

     * The path to a file to save this Context information.

     */

    private String configFile = null;

    /**

     * The "correctly configured" flag for this Context.

     */

    private boolean configured = false;

    /**

     * The security constraints for this web application.

     */

    private SecurityConstraint constraints[] = new SecurityConstraint[0];

    private final Object constraintsLock = new Object();

    /**

     * The ServletContext implementation associated with this Context.

     */

    protected transient ApplicationContext context = null;

    /**

     * Compiler classpath to use.

     */

    private String compilerClasspath = null;

    /**

     * Should we attempt to use cookies for session id communication?

     */

    private boolean cookies = true;

    /**

     * Should we allow the <code>ServletContext.getContext()</code> method

     * to access the context of other web applications in this server?

     */

    private boolean crossContext = false;

    /**

     * Encoded path.

     */

    private String encodedPath = null;

    /**

     * The "follow standard delegation model" flag that will be used to

     * configure our ClassLoader.

     */

    private boolean delegate = false;

    /**

     * The display name of this web application.

     */

    private String displayName = null;

    /** 

     * Override the default context xml location.

     */

    private String defaultContextXml;

    /** 

     * Override the default web xml location.

     */

    private String defaultWebXml;

    /**

     * The distributable flag for this web application.

     */

    private boolean distributable = false;

    /**

     * The document root for this web application.

     */

    private String docBase = null;

    /**

     * Has URL rewriting been disabled. 

     */

    private boolean disableURLRewriting = false;

    /**

     * The exception pages for this web application, keyed by fully qualified

     * class name of the Java exception.

     */

    private HashMap exceptionPages = new HashMap();

    /**

     * The set of filter configurations (and associated filter instances) we

     * have initialized, keyed by filter name.

     */

    private HashMap filterConfigs = new HashMap();

    /**

     * The set of filter definitions for this application, keyed by

     * filter name.

     */

    private HashMap filterDefs = new HashMap();

    /**

     * The set of filter mappings for this application, in the order

     * they were defined in the deployment descriptor.

     */

    private FilterMap filterMaps[] = new FilterMap[0];

    private final Object filterMapsLock = new Object();

    /**

     * Ignore annotations.

     */

    private boolean ignoreAnnotations = false;

    /**

     * The set of classnames of InstanceListeners that will be added

     * to each newly created Wrapper by <code>createWrapper()</code>.

     */

    private String instanceListeners[] = new String[0];

    private final Object instanceListenersLock = new Object();

    /**

     * The login configuration descriptor for this web application.

     */

    private LoginConfig loginConfig = null;

    /**

     * The mapper associated with this context.

     */

    private org.apache.tomcat.util.http.mapper.Mapper mapper = 

        new org.apache.tomcat.util.http.mapper.Mapper();

    /**

     * The naming context listener for this web application.

     */

    private transient NamingContextListener namingContextListener = null;

    /**

     * The naming resources for this web application.

     */

    private NamingResources namingResources = null;

    /**

     * The message destinations for this web application.

     */

    private HashMap messageDestinations = new HashMap();

    /**

     * The MIME mappings for this web application, keyed by extension.

     */

    private HashMap mimeMappings = new HashMap();

     /**

      * Special case: error page for status 200.

      */

     private ErrorPage okErrorPage = null;

    /**

     * The context initialization parameters for this web application,

     * keyed by name.

     */

    private HashMap parameters = new HashMap();

    /**

     * The request processing pause flag (while reloading occurs)

     */

    private boolean paused = false;

    /**

     * The public identifier of the DTD for the web application deployment

     * descriptor version we are currently parsing.  This is used to support

     * relaxed validation rules when processing version 2.2 web.xml files.

     */

    private String publicId = null;

    /**

     * The reloadable flag for this web application.

     */

    private boolean reloadable = false;

    /**

     * Unpack WAR property.

     */

    private boolean unpackWAR = true;

    /**

     * The DefaultContext override flag for this web application.

     */

    private boolean override = false;

    /**

     * The original document root for this web application.

     */

    private String originalDocBase = null;

    /**

     * The privileged flag for this web application.

     */

    private boolean privileged = false;

    /**

     * Should the next call to <code>addWelcomeFile()</code> cause replacement

     * of any existing welcome files?  This will be set before processing the

     * web application's deployment descriptor, so that application specified

     * choices <strong>replace</strong>, rather than append to, those defined

     * in the global descriptor.

     */

    private boolean replaceWelcomeFiles = false;

    /**

     * The security role mappings for this application, keyed by role

     * name (as used within the application).

     */

    private HashMap roleMappings = new HashMap();

    /**

     * The security roles for this application, keyed by role name.

     */

    private String securityRoles[] = new String[0];

    private final Object securityRolesLock = new Object();

    /**

     * The servlet mappings for this web application, keyed by

     * matching pattern.

     */

    private HashMap servletMappings = new HashMap();

    private final Object servletMappingsLock = new Object();

    /**

     * The session timeout (in minutes) for this web application.

     */

    private int sessionTimeout = 30;

    /**