/*
    * 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.stereotype.Component;
  import org.springframework.ui.Model;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  
  /**
   * Spring MVC controller responsible for authenticating the user.
   *
   * @since 0.1
   */
  @Component
  @RequestMapping("/s/login")
  public class LoginController {
  
      private static transient final Logger log = LoggerFactory.getLogger(LoginController.class);
  
      private static String loginView = "login";
  
      @RequestMapping(method = RequestMethod.GET)
      protected String view() {
          return loginView;
      }
  
      @RequestMapping(method = RequestMethod.POST)
      protected String onSubmit(@RequestParam("username") String username,
                                @RequestParam("password") String password,
                                Model model) throws Exception {
  
          UsernamePasswordTokenordToken.html#UsernamePasswordToken">UsernamePasswordToken token = new UsernamePasswordToken(username, password);
  
          try {
              SecurityUtils.getSubject().login(token);
          } catch (AuthenticationException e) {
              log.debug("Error authenticating.", e);
              model.addAttribute("errorInvalidLogin", "The username or password was not correct.");
  
              return loginView;
          }
  
          return "redirect:/s/index";
      }
  }