content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.nacos.console.filter;
  
  import com.alibaba.nacos.console.config.WebSecurityConfig;
  import com.alibaba.nacos.console.utils.JwtTokenUtils;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.context.SecurityContextHolder;
  import org.springframework.util.StringUtils;
  import org.springframework.web.filter.OncePerRequestFilter;
  
  import javax.servlet.FilterChain;
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  
  /**
   * jwt auth token filter
   *
   * @author wfnuser
   */
  public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
  
      private static final String TOKEN_PREFIX = "Bearer ";
  
      private JwtTokenUtils tokenProvider;
  
      public JwtAuthenticationTokenFilter(JwtTokenUtils tokenProvider) {
          this.tokenProvider = tokenProvider;
      }
  
      @Override
      protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
          String jwt = resolveToken(request);
  
          if (jwt != null && !"".equals(jwt.trim()) && SecurityContextHolder.getContext().getAuthentication() == null) {
              if (this.tokenProvider.validateToken(jwt)) {
                  /**
                   * get auth info
                   */
                  Authentication authentication = this.tokenProvider.getAuthentication(jwt);
                  /**
                   * save user info to securityContext
                   */
                  SecurityContextHolder.getContext().setAuthentication(authentication);
              }
          }
  
          chain.doFilter(request, response);
      }
  
      /**
       * Get token from header
       */
      private String resolveToken(HttpServletRequest request) {
          String bearerToken = request.getHeader(WebSecurityConfig.AUTHORIZATION_HEADER);
          if (StringUtils.hasText(bearerToken) && bearerToken.startsWith(TOKEN_PREFIX)) {
              return bearerToken.substring(7, bearerToken.length());
          }
          String jwt = request.getParameter(WebSecurityConfig.AUTHORIZATION_TOKEN);
          if (StringUtils.hasText(jwt)) {
              return jwt;
          }
          return null;
      }
  }
  