/*
 * 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.valves;


import java.io.IOException;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;

import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.util.StringManager;
import org.apache.commons.logging.Log;


/**
 * <p>Implementation of a Valve that logs interesting contents from the
 * specified Request (before processing) and the corresponding Response
 * (after processing).  It is especially useful in debugging problems
 * related to headers and cookies.</p>
 *
 * <p>This Valve may be attached to any Container, depending on the granularity
 * of the logging you wish to perform.</p>
 *
 * <p>Note that this Valve sets the character encoding of the request to the default
 * (ISO-8859-1) if it's the first thing invoking request.getParameterNames, which
 * is usually the case.  If you're running in an environment where this encoding
 * is problematic, consider using another debugging approach such as a Filter that
 * reproduces this Valve's functionality.</p>
 *
 * <p>For a similar mechanism that is portable to all Servlet 2.4
 * containers, check out the "RequestDumperFilter" Filter in the
 * example application (the source for this filter may be found in
 * $CATALINA_HOME/webapps/examples/WEB-INF/classes/filters.</p>
 *
 * @author Craig R. McClanahan
 * @version $Revision$ $Date$
 */

public class RequestDumperValve extends ValveBase {
    // ----------------------------------------------------- Instance Variables


    /**
     * The descriptive information related to this implementation.
     */
    private static final String info =
        "org.apache.catalina.valves.RequestDumperValve/1.0";


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


    // ------------------------------------------------------------- Properties


    /**
     * Return descriptive information about this Valve implementation.
     */
    public String getInfo() {

        return (info);

    }


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


    /**
     * Log the interesting request parameters, invoke the next Valve in the
     * sequence, and log the interesting response parameters.
     *
     * @param request The servlet request to be processed
     * @param response The servlet response to be created
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
     */
    public void invoke(Request request, Response response)
        throws IOException, ServletException {

        Log log = container.getLogger();
        
        // Log pre-service information
        log.info("REQUEST URI       =" + request.getRequestURI());
        log.info("          authType=" + request.getAuthType());
        log.info(" characterEncoding=" + request.getCharacterEncoding());
        log.info("     contentLength=" + request.getContentLength());
        log.info("       contentType=" + request.getContentType());
        log.info("       contextPath=" + request.getContextPath());
        Cookie cookies[] = request.getCookies();
        if (cookies != null) {
            for (int i = 0; i < cookies.length; i++)
                log.info("            cookie=" + cookies[i].getName() + "=" +
                    cookies[i].getValue());
        }
        Enumeration hnames = request.getHeaderNames();
        while (hnames.hasMoreElements()) {
            String hname = (String) hnames.nextElement();
            Enumeration hvalues = request.getHeaders(hname);
            while (hvalues.hasMoreElements()) {
                String hvalue = (String) hvalues.nextElement();
                log.info("            header=" + hname + "=" + hvalue);
            }
        }
        log.info("            locale=" + request.getLocale());
        log.info("            method=" + request.getMethod());
        Enumeration pnames = request.getParameterNames();
        while (pnames.hasMoreElements()) {
            String pname = (String) pnames.nextElement();
            String pvalues[] = request.getParameterValues(pname);
            StringBuffer result = new StringBuffer(pname);
            result.append('=');
            for (int i = 0; i < pvalues.length; i++) {
                if (i > 0)
                    result.append(", ");
                result.append(pvalues[i]);
            }
            log.info("         parameter=" + result.toString());
        }
        log.info("          pathInfo=" + request.getPathInfo());
        log.info("          protocol=" + request.getProtocol());
        log.info("       queryString=" + request.getQueryString());
        log.info("        remoteAddr=" + request.getRemoteAddr());
        log.info("        remoteHost=" + request.getRemoteHost());
        log.info("        remoteUser=" + request.getRemoteUser());
        log.info("requestedSessionId=" + request.getRequestedSessionId());
        log.info("            scheme=" + request.getScheme());
        log.info("        serverName=" + request.getServerName());
        log.info("        serverPort=" + request.getServerPort());
        log.info("       servletPath=" + request.getServletPath());
        log.info("          isSecure=" + request.isSecure());
        log.info("---------------------------------------------------------------");

        // Perform the request
        getNext().invoke(request, response);

        // Log post-service information
        log.info("---------------------------------------------------------------");
        log.info("          authType=" + request.getAuthType());
        log.info("     contentLength=" + response.getContentLength());
        log.info("       contentType=" + response.getContentType());
        Cookie rcookies[] = response.getCookies();
        for (int i = 0; i < rcookies.length; i++) {
            log.info("            cookie=" + rcookies[i].getName() + "=" +
                rcookies[i].getValue() + "; domain=" +
                rcookies[i].getDomain() + "; path=" + rcookies[i].getPath());
        }
        String rhnames[] = response.getHeaderNames();
        for (int i = 0; i < rhnames.length; i++) {
            String rhvalues[] = response.getHeaderValues(rhnames[i]);
            for (int j = 0; j < rhvalues.length; j++)
                log.info("            header=" + rhnames[i] + "=" + rhvalues[j]);
        }
        log.info("           message=" + response.getMessage());
        log.info("        remoteUser=" + request.getRemoteUser());
        log.info("            status=" + response.getStatus());
        log.info("===============================================================");

    }


    /**
     * Return a String rendering of this object.
     */
    public String toString() {

        StringBuffer sb = new StringBuffer("RequestDumperValve[");
        if (container != null)
            sb.append(container.getName());
        sb.append("]");
        return (sb.toString());

    }


}