PasswordServlet.java from DSpace at Krugle

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/*
 * PasswordServlet.java
 *
 * Version: $Revision: 2168 $
 *
 * Date: $Date: 2007-08-27 15:40:09 -0700 (Mon, 27 Aug 2007) $
 *
 * Copyright (c) 2002-2005, Hewlett-Packard Company and Massachusetts
 * Institute of Technology.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - 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.
 *
 * - Neither the name of the Hewlett-Packard Company nor the name of the
 * Massachusetts Institute of Technology nor the names of their
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS 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 COPYRIGHT
 * HOLDERS OR 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.
 */
package org.dspace.app.webui.servlet;

import java.io.IOException;
import java.sql.SQLException;
import java.util.Locale;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.jstl.core.Config;

import org.apache.log4j.Logger;
import org.dspace.app.webui.util.Authenticate;
import org.dspace.app.webui.util.JSPManager;
import org.dspace.authenticate.AuthenticationManager;
import org.dspace.authenticate.AuthenticationMethod;
import org.dspace.authorize.AuthorizeException;
import org.dspace.core.Context;
import org.dspace.core.I18nUtil;
import org.dspace.core.LogManager;

/**
 * Simple username and password authentication servlet. Displays the login form
 * <code>/login/password.jsp</code> on a GET, otherwise process the parameters
 * as an email and password.
 * 
 * Calls stackable authentication to give credentials to all
 * authentication methods that can make use of them, not just DSpace-internal.
 *
 * @author Robert Tansley
 * @version $Revision: 2168 $
 */
public class PasswordServlet extends DSpaceServlet
{
    /** log4j logger */
    private static Logger log = Logger.getLogger(PasswordServlet.class);

    protected void doDSGet(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {
        // Simply forward to the plain form
        JSPManager.showJSP(request, response, "/login/password.jsp");
    }

    protected void doDSPost(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {
        // Process the POSTed email and password
        String email = request.getParameter("login_email");
        String password = request.getParameter("login_password");
        String jsp = null;

        // Locate the eperson
        int status = AuthenticationManager.authenticate(context, email, password,
                        null, request);
 
       
        if (status == AuthenticationMethod.SUCCESS)
        {
            // Logged in OK.
            Authenticate.loggedIn(context, request, context.getCurrentUser());

            // Set the Locale according to user preferences
            String preferredLanguage = context.getCurrentUser().getLanguage();
            Locale epersonLocale = I18nUtil.getSupportedLocale(new Locale(preferredLanguage));
            context.setCurrentLocale(epersonLocale);
            Config.set(request.getSession(), Config.FMT_LOCALE, epersonLocale);

            log.info(LogManager.getHeader(context, "login", "type=explicit"));

                // resume previous request
                Authenticate.resumeInterruptedRequest(request, response);

                return;
        }
        else if (status == AuthenticationMethod.CERT_REQUIRED)
            jsp = "/error/require-certificate.jsp";
        else
            jsp = "/login/incorrect.jsp";

        // If we reach here, supplied email/password was duff.
        log.info(LogManager.getHeader(context, "failed_login",
                "email=" + email + ", result=" + String.valueOf(status)));
        JSPManager.showJSP(request, response, jsp);
    }
}
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