/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.app.xmlui.aspect.eperson;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.acting.AbstractAction;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.environment.http.HttpEnvironment;
import org.apache.cocoon.sitemap.PatternException;
import org.dspace.app.xmlui.utils.AuthenticationUtil;
import org.dspace.core.ConfigurationManager;
import org.dspace.core.Context;
import org.dspace.eperson.EPerson;
/**
* Attempt to authenticate the user based upon their presented credentials.
* This action uses the http parameters of login_email, login_password, and
* login_realm as credentials.
*
* If the authentication attempt is successful then an HTTP redirect will be
* sent to the browser redirecting them to their original location in the
* system before authenticated or if none is supplied back to the DSpace
* homepage. The action will also return true, thus contents of the action will
* be excuted.
*
* If the authentication attempt fails, the action returns false.
*
* Example use:
*
* <map:act name="Authenticate">
* <map:serialize type="xml"/>
* </map:act>
* <map:transform type="try-to-login-again-transformer">
*
* @author Scott Phillips
*/
public class AuthenticateAction extends AbstractAction
{
/**
* Attempt to authenticate the user.
*/
public Map act(Redirector redirector, SourceResolver resolver, Map objectModel,
String source, Parameters parameters) throws Exception
{
// First check if we are performing a new login
Request request = ObjectModelHelper.getRequest(objectModel);
String email = request.getParameter("login_email");
String password = request.getParameter("login_password");
String realm = request.getParameter("login_realm");
// Protect against NPE errors inside the authentication
// class.
if ((email == null) || (password == null))
{
return null;
}
try
{
Context context = AuthenticationUtil.authenticate(objectModel, email,password, realm);
EPerson eperson = context.getCurrentUser();
if (eperson != null)
{
// The user has successfully logged in
String redirectURL = request.getContextPath();
if (AuthenticationUtil.isInterupptedRequest(objectModel))
{
// Resume the request and set the redirect target URL to
// that of the originally interrupted request.
redirectURL += AuthenticationUtil.resumeInterruptedRequest(objectModel);
}
else
{
// Otherwise direct the user to the specified 'loginredirect' page (or homepage by default)
String loginRedirect = ConfigurationManager.getProperty("xmlui.user.loginredirect");
redirectURL += (loginRedirect != null) ? loginRedirect.trim() : "/";
}
// Authentication successful send a redirect.
final HttpServletResponse httpResponse = (HttpServletResponse) objectModel.get(HttpEnvironment.HTTP_RESPONSE_OBJECT);
httpResponse.sendRedirect(redirectURL);
// log the user out for the rest of this current request, however they will be reauthenticated
// fully when they come back from the redirect. This prevents caching problems where part of the
// request is performed before the user was authenticated and the other half after it succeeded. This
// way the user is fully authenticated from the start of the request.
context.setCurrentUser(null);
return new HashMap();
}
}
catch (SQLException sqle)
{
throw new PatternException("Unable to perform authentication",
sqle);
}
return null;
}
}