/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 package org.apache.shiro.samples.spring.web;

 import org.apache.shiro.SecurityUtils;

 import org.apache.shiro.authc.AuthenticationException;

 import org.apache.shiro.authc.UsernamePasswordToken;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 import org.springframework.validation.BindException;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.mvc.SimpleFormController;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 /**

  * Spring MVC controller responsible for authenticating the user.

  *

  * @since 0.1

  */

 public class LoginController extends SimpleFormController {

     private static transient final Logger log = LoggerFactory.getLogger(LoginController.class);

     protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object cmd, BindException errors) throws Exception {

         LoginCommand command = (LoginCommand) cmd;

         UsernamePasswordToken token = new UsernamePasswordToken(command.getUsername(), command.getPassword());

         try {

             SecurityUtils.getSubject().login(token);

         } catch (AuthenticationException e) {

             log.debug("Error authenticating.", e);

             errors.reject("error.invalidLogin", "The username or password was not correct.");

         }

         if (errors.hasErrors()) {

             return showForm(request, response, errors);

         } else {

             return new ModelAndView(getSuccessView());

         }

     }

 }