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/**
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* '$RCSfile$'
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* Purpose: A Class that implements login methods
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* Copyright: 2008 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* ors: Michael Daigle
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*
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* '$or: daigle $'
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* '$Date$'
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* '$Revision$'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.admin;
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import java.util.Vector;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.shared.MetacatUtilException;
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import edu.ucsb.nceas.metacat.util.AuthUtil;
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import edu.ucsb.nceas.metacat.util.RequestUtil;
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/**
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* Control the display of the login page
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*/
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public class LoginAdmin extends MetacatAdmin {
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private static LoginAdmin Admin = null;
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private static Logger logMetacat = Logger.getLogger(LoginAdmin.class);
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/**
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* private constructor since this is a singleton
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*/
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private LoginAdmin() {}
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/**
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* Get the single instance of LoginAdmin.
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*
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* @return the single instance of LoginAdmin
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*/
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public static LoginAdmin getInstance() {
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if (Admin == null) {
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Admin = new LoginAdmin();
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}
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return Admin;
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}
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/**
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* Handle configuration of the Authentication properties
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*
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* @param request
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* the http request information
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* @param response
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* the http response to be sent back to the client
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*/
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public void authenticateUser(HttpServletRequest request,
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HttpServletResponse response) throws AdminException {
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String processForm = request.getParameter("processForm");
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String formErrors = (String) request.getAttribute("formErrors");
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if (processForm == null || !processForm.equals("true") || formErrors != null) {
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// The servlet configuration parameters have not been set, or there
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// were form errors on the last attempt to configure, so redirect to
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// the web form for configuring metacat
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try {
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request.setAttribute("adminList", AuthUtil.getAdministrators());
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// Forward the request to the JSP page
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RequestUtil.forwardRequest(request, response,
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"/admin/admin-login.jsp", null);
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} catch (MetacatUtilException mue) {
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throw new AdminException("LoginAdmin.authenticateUser - Utility problem while " +
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"processing login page: " + mue.getMessage());
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}
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} else {
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// The configuration form is being submitted and needs to be
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// processed.
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Vector<String> processingSuccess = new Vector<String>();
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Vector<String> processingErrors = new Vector<String>();
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Vector<String> validationErrors = new Vector<String>();
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String userName = "";
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userName = request.getParameter("username");
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String password = request.getParameter("password");
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// Validate that the options provided are legitimate. Note that
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// we've allowed them to persist their entries. As of this point
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// there is no other easy way to go back to the configure form
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// and preserve their entries.
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validationErrors.addAll(validateOptions(request));
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if (validationErrors.size() == 0) {
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try {
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AuthUtil.logUserIn(request, userName, password);
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} catch (MetacatUtilException ue) {
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String errorMessage = "LoginAdmin.authenticateUser - Could not log in as: " + userName
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+ " : " + ue.getMessage() + ". Please try again";
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processingErrors.add(errorMessage);
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logMetacat.error(errorMessage);
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}
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}
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try {
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if (validationErrors.size() > 0 || processingErrors.size() > 0) {
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setRequestFormErrors(request, validationErrors);
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RequestUtil.setRequestErrors(request, processingErrors);
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RequestUtil.forwardRequest(request, response, "/admin", null);
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} else {
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// Reload the main metacat configuration page
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processingSuccess.add("User logged in as: " + userName);
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RequestUtil.clearRequestMessages(request);
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RequestUtil.setUserId(request, userName);
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RequestUtil.setRequestSuccess(request, processingSuccess);
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RequestUtil.forwardRequest(request, response,
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"/admin?configureType=configure&processForm=false", null);
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}
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} catch (MetacatUtilException mue) {
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throw new AdminException("LoginAdmin.authenticateUser - IO problem while processing login page: "
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+ mue.getMessage());
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}
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}
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}
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/**
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* Validate the most important configuration options submitted by the user.
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*
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* @return a vector holding error message for any fields that fail
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* validation.
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*/
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protected Vector<String> validateOptions(HttpServletRequest request) {
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Vector<String> errorVector = new Vector<String>();
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//TODO MCD validate options.
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return errorVector;
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}
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}
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