defaultservlet.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

/*
 * ====================================================================
 * $Header: /home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/servlets/DefaultServlet.java,v 1.18 2003/09/02 21:22:05 remm Exp $
 * $Revision: 1.18 $
 * $Date: 2003/09/02 21:22:05 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */


package org.apache.catalina.servlets;


import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.sql.Timestamp;
import java.util.Date;
import java.util.Enumeration;
import java.util.StringTokenizer;
import java.util.Vector;

import javax.naming.InitialContext;
import javax.naming.NameClassPair;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.Attributes;
import javax.naming.directory.DirContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.catalina.Globals;
import org.apache.catalina.util.MD5Encoder;
import org.apache.catalina.util.ServerInfo;
import org.apache.catalina.util.StringManager;
import org.apache.catalina.util.URLEncoder;
import org.apache.naming.resources.Resource;
import org.apache.naming.resources.ResourceAttributes;
import org.apache.tomcat.util.http.FastHttpDateFormat;


/**
 * The default resource-serving servlet for most web applications,
 * used to serve static resources such as HTML pages and images.
 *
 * @author Craig R. McClanahan
 * @author Remy Maucherat
 * @version $Revision: 1.18 $ $Date: 2003/09/02 21:22:05 $
 */

public class DefaultServlet
    extends HttpServlet {


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


    /**
     * The debugging detail level for this servlet.
     */
    protected int debug = 0;


    /**
     * The input buffer size to use when serving resources.
     */
    protected int input = 2048;


    /**
     * Should we generate directory listings?
     */
    protected boolean listings = true;


    /**
     * Read only flag. By default, it's set to true.
     */
    protected boolean readOnly = true;


    /**
     * The output buffer size to use when serving resources.
     */
    protected int output = 2048;


    /**
     * MD5 message digest provider.
     */
    protected static MessageDigest md5Helper;


    /**
     * The MD5 helper object for this class.
     */
    protected static final MD5Encoder md5Encoder = new MD5Encoder();


    /**
     * Array containing the safe characters set.
     */
    protected static URLEncoder urlEncoder;


    /**
     * Allow customized directory listing per directory.
     */
    protected String  localXsltFile = null;


    /**
     * Allow customized directory listing per instance.
     */
    protected String  globalXsltFile = null;


    /**
     * Allow a readme file to be included.
     */
    protected String readmeFile = null;



    // ----------------------------------------------------- Static Initializer


    /**
     * GMT timezone - all HTTP dates are on GMT
     */
    static {
        urlEncoder = new URLEncoder();
        urlEncoder.addSafeCharacter('-');
        urlEncoder.addSafeCharacter('_');
        urlEncoder.addSafeCharacter('.');
        urlEncoder.addSafeCharacter('*');
        urlEncoder.addSafeCharacter('/');
    }


    /**
     * MIME multipart separation string
     */
    protected static final String mimeSeparation = "CATALINA_MIME_BOUNDARY";


    /**
     * JNDI resources name.
     */
    protected static final String RESOURCES_JNDI_NAME = "java:/comp/Resources";


    /**
     * The string manager for this package.
     */
    protected static StringManager sm =
        StringManager.getManager(Constants.Package);


    /**
     * Size of file transfer buffer in bytes.
     */
    private static final int BUFFER_SIZE = 4096;


    // --------------------------------------------------------- Public Methods


    /**
     * Finalize this servlet.
     */
    public void destroy() {
    }


    /**
     * Initialize this servlet.
     */
    public void init() throws ServletException {

        // Set our properties from the initialization parameters
        String value = null;
        try {
            value = getServletConfig().getInitParameter("debug");
            debug = Integer.parseInt(value);
        } catch (Throwable t) {
            ;
        }
        try {
            value = getServletConfig().getInitParameter("input");
            input = Integer.parseInt(value);
        } catch (Throwable t) {
            ;
        }
        try {
            value = getServletConfig().getInitParameter("listings");
            listings = (new Boolean(value)).booleanValue();
        } catch (Throwable t) {
            ;
        }
        try {
            value = getServletConfig().getInitParameter("readonly");
            if (value != null)
                readOnly = (new Boolean(value)).booleanValue();
        } catch (Throwable t) {
            ;
        }
        try {
            value = getServletConfig().getInitParameter("output");
            output = Integer.parseInt(value);
        } catch (Throwable t) {
            ;
        }

        globalXsltFile = getServletConfig().getInitParameter("globalXsltFile");
        localXsltFile = getServletConfig().getInitParameter("localXsltFile");
        readmeFile = getServletConfig().getInitParameter("readmeFile");


        // Sanity check on the specified buffer sizes
        if (input < 256)
            input = 256;
        if (output < 256)
            output = 256;

        if (debug > 0) {
            log("DefaultServlet.init:  input buffer size=" + input +
                ", output buffer size=" + output);
        }

        // Load the MD5 helper used to calculate signatures.
        try {
            md5Helper = MessageDigest.getInstance("MD5");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            throw new IllegalStateException();
        }

    }



    // ------------------------------------------------------ Protected Methods


    /**
     * Get resources. This method will try to retrieve the resources through
     * JNDI first, then in the servlet context if JNDI has failed (it could be
     * disabled). It will return null.
     *
     * @return A JNDI DirContext, or null.
     */
    protected DirContext getResources() {

        DirContext result = null;

        // Try the servlet context
        try {
            result = (DirContext) getServletContext()
                .getAttribute(Globals.RESOURCES_ATTR);
        } catch (ClassCastException e) {
            // Failed : Not the right type
        }

        if (result != null)
            return result;

        // Try JNDI
        try {
            result =
                (DirContext) new InitialContext().lookup(RESOURCES_JNDI_NAME);
        } catch (NamingException e) {
            // Failed
        } catch (ClassCastException e) {
            // Failed : Not the right type
        }

        return result;

    }


    /**
     * Show HTTP header information.
     */
    protected void showRequestInfo(HttpServletRequest req) {

        System.out.println();
        System.out.println("SlideDAV Request Info");
        System.out.println();

        // Show generic info
        System.out.println("Encoding : " + req.getCharacterEncoding());
        System.out.println("Length : " + req.getContentLength());
        System.out.println("Type : " + req.getContentType());

        System.out.println();
        System.out.println("Parameters");

        Enumeration parameters = req.getParameterNames();

        while (parameters.hasMoreElements()) {
            String paramName = (String) parameters.nextElement();
            String[] values = req.getParameterValues(paramName);
            System.out.print(paramName + " : ");
            for (int i = 0; i < values.length; i++) {
                System.out.print(values[i] + ", ");
            }
            System.out.println();