/*
 * Copyright 2004 The Apache Software Foundation.
 * 
 * Licensed 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.
 */ 
/* $Id: RequestHeaderExample.java 289023 2004-08-26 22:06:34Z markt $
 *
 */

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

import util.HTMLFilter;

/**
 * Example servlet showing request headers
 *
 * @author James Duncan Davidson <duncan@eng.sun.com>
 */

public class RequestHeaderExample extends HttpServlet {

    ResourceBundle rb = ResourceBundle.getBundle("LocalStrings");
    
    public void doGet(HttpServletRequest request,
                      HttpServletResponse response)
        throws IOException, ServletException
    {
        response.setContentType("text/html");

        PrintWriter out = response.getWriter();
        out.println("<html>");
        out.println("<body bgcolor=\"white\">");
        out.println("<head>");

        String title = rb.getString("requestheader.title");
        out.println("<title>" + title + "</title>");
        out.println("</head>");
        out.println("<body>");

        // Can't use relative links as the addition of pathinfo to the URI
        // breaks relative links. Therefore use absolute links but don't hard
        // code the context name so webapp can be deployed as different context
        // and will still work.
        String context = request.getContextPath();
        
        out.println("<a href=\"" + context + "/servlets/reqheaders.html\">");
        out.println("<img src=\"" + context + "/images/code.gif\" height=24 " +
                    "width=24 align=right border=0 alt=\"view code\"></a>");
        out.println("<a href=\"" + context + "/servlets/index.html\">");
        out.println("<img src=\"" + context + "/images/return.gif\" " +
                    "height=24 width=24 align=right border=0 alt=\"return\">" +
                    "</a>");

        out.println("<h3>" + title + "</h3>");
        out.println("<table border=0>");
        Enumeration e = request.getHeaderNames();
        while (e.hasMoreElements()) {
            String headerName = (String)e.nextElement();
            String headerValue = request.getHeader(headerName);
            out.println("<tr><td bgcolor=\"#CCCCCC\">");
            out.println(HTMLFilter.filter(headerName));
            out.println("</td><td>");
            out.println(HTMLFilter.filter(headerValue));
            out.println("</td></tr>");
        }
        out.println("</table>");
    }

    public void doPost(HttpServletRequest request,
                      HttpServletResponse response)
        throws IOException, ServletException
    {
        doGet(request, response);
    }

}

