fll.web.DoLogin.java Source code

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Here is the source code for fll.web.DoLogin.java

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/*
 * Copyright (c) 2011 INSciTE.  All rights reserved
 * INSciTE is on the web at: http://www.hightechkids.org
 * This code is released under GPL; see LICENSE.txt for details.
 */

package fll.web;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Map;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;

import net.mtu.eggplant.util.sql.SQLFunctions;

import org.apache.commons.codec.digest.DigestUtils;
import org.apache.log4j.Logger;

import fll.db.Queries;
import fll.util.LogUtils;

/**
 * Handle login credentials and if incorrect redirect back to login page.
 */
@WebServlet("/DoLogin")
public class DoLogin extends BaseFLLServlet {

    private static final Logger LOGGER = LogUtils.getLogger();

    @Override
    protected void processRequest(final HttpServletRequest request, final HttpServletResponse response,
            final ServletContext application, final HttpSession session) throws IOException, ServletException {

        doLogin(request, response, application, session);
    }

    /**
     * Does the work of login. Exists as a separate method so that it can be
     * called from {@link fll.web.admin.CreateUser}
     */
    public static void doLogin(final HttpServletRequest request, final HttpServletResponse response,
            final ServletContext application, final HttpSession session) throws IOException, ServletException {
        final DataSource datasource = ApplicationAttributes.getDataSource(application);
        Connection connection = null;
        try {
            connection = datasource.getConnection();

            // check for authentication table
            if (Queries.isAuthenticationEmpty(connection)) {
                LOGGER.warn("No authentication information in the database");
                session.setAttribute(SessionAttributes.MESSAGE,
                        "<p class='error'>No authentication information in the database - see administrator</p>");
                response.sendRedirect(response.encodeRedirectURL("login.jsp"));
                return;
            }

            // compute hash
            final String user = request.getParameter("user");
            final String pass = request.getParameter("pass");
            if (null == user || user.isEmpty() || null == pass || pass.isEmpty()) {
                LOGGER.warn("Form fields missing");
                session.setAttribute(SessionAttributes.MESSAGE,
                        "<p class='error'>You must fill out all fields in the form.</p>");
                response.sendRedirect(response.encodeRedirectURL("login.jsp"));
                return;
            }
            final String hashedPass = DigestUtils.md5Hex(pass);

            // compare login information
            if (LOGGER.isTraceEnabled()) {
                LOGGER.trace("Checking user: " + user + " hashedPass: " + hashedPass);
            }
            final Map<String, String> authInfo = Queries.getAuthInfo(connection);
            for (final Map.Entry<String, String> entry : authInfo.entrySet()) {
                if (user.equals(entry.getKey()) && hashedPass.equals(entry.getValue())) {
                    // clear out old login cookies first
                    CookieUtils.clearLoginCookies(application, request, response);

                    final String magicKey = String.valueOf(System.currentTimeMillis());
                    Queries.addValidLogin(connection, user, magicKey);
                    CookieUtils.setLoginCookie(response, magicKey);

                    String redirect = SessionAttributes.getRedirectURL(session);
                    if (null == redirect) {
                        redirect = "index.jsp";
                    }
                    response.sendRedirect(response.encodeRedirectURL(redirect));
                    return;
                } else {
                    if (LOGGER.isTraceEnabled()) {
                        LOGGER.trace("Didn't match user: " + entry.getKey() + " pass: " + entry.getValue());
                    }
                }
            }

            LOGGER.warn("Incorrect login credentials user: " + user);
            session.setAttribute(SessionAttributes.MESSAGE,
                    "<p class='error'>Incorrect login information provided</p>");
            response.sendRedirect(response.encodeRedirectURL("login.jsp"));
            return;
        } catch (final SQLException e) {
            throw new RuntimeException(e);
        } finally {
            SQLFunctions.close(connection);
        }
    }

}