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What this is

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The source code

/**
 *  WebForum (c) 2000 Daniel Lemire , This program is free software; you can
 *  redistribute it and/or modify it under the terms of the GNU General Public
 *  License as published by the Free Software Foundation (version 2). This
 *  program is distributed in the hope that it will be useful, but WITHOUT ANY
 *  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *  FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 *  details. You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software Foundation,
 *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package com.ondelette.servlet;

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

/**
 *  Description of the Class
 *
 *@author     Daniel Lemire
 *@created    March 12th 1999
 */
public class ServletErrorHandling {

	private final static String mEnglishColor = "<FONT COLOR=\"RED\">";
	private final static String mFrenchColor = "<FONT COLOR=\"BLUE\">";


	/**
	 *  A convenience method to print out detailed error messages in HTML.
	 *
	 *@param  request
	 *@param  response
	 *@param  e				your exception
	 *@exception  ServletException
	 *@exception  IOException
	 *@since 0.30
	 */
	public static void printErrorMessage(HttpServletRequest request,
			HttpServletResponse response, Exception e)
			 throws ServletException, IOException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out.println("<HTML>");
		out.println("<H1>" + mFrenchColor + "Rapport d'erreur / " + mEnglishColor + "Error report");
		Enumeration enum = request.getParameterNames();
		if (enum.hasMoreElements()) {
			out.println("<HR>");
			out.println("<PRE>");
			out.println("<H2>" + mFrenchColor + "Voici les paramètres définis / " + mEnglishColor + "Here are the defined parameters");
			while (enum.hasMoreElements()) {
				String param = (String) enum.nextElement();
				out.print(param + " = ");
				out.println(request.getParameter(param));
			}
			out.println("</PRE>");
			out.println("<HR>");
		}
		if (e != null) {
			out.println("<PRE>");
			out.println(mFrenchColor + "Condition avec exception</FONT> / " + mEnglishColor + "Exception thrown");
			e.printStackTrace(out);
			out.println("</PRE>");
		} else {
			out.println("<P>" + mFrenchColor + "Erreur sans exception / " + mEnglishColor + "No exception thrown");
			out.println("<P>" + mFrenchColor + "Vous n'avez sans doute pas indiqué de forum pour cette servlet. L'URL utilisé n'est pas accessible directement et certains paramètres cachés sont manquants.");
			out.println("<P>" + mEnglishColor + "You probably haven't specified a forum for this servlet. This URL cannot be called directly, some hidden parameters are required.");
		}
		out.println("<P>" + mFrenchColor + "Veuillez faire rapport du problème au besoin en donnant ces quelques informations.");
		out.println("<P>" + mEnglishColor + "Please report this problem if necessary with the above information.");
		ServletCopyright.printFooter(out);
		out.flush();
	}

}

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