文章目录

• 前言
• OncePerRequestFilter 使用
• • • 检查是否登录过期过滤器
    • 检查是否登录过期过滤器
    • SecurityConfiguration 配置

      前言

      OncePerRequestFilter 是一个过滤器，每个请求都会执行一次；一般开发中主要是做检查是否已登录、Token是否过期和授权等操作，而每个操作都是一个过滤器，下面演示一下。

      OncePerRequestFilter 使用

      检查是否登录过期过滤器

      import lombok.extern.slf4j.Slf4j;
      import org.springframework.stereotype.Component;
      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;
      /**
       * 检查是否登录过期
       *
       * @author francis
       * @create: 2023-08-30 16:45
       **/
      @Component
      @Slf4j
      public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {
          @Override
          protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
              log.info("进入 JwtAuthenticationTokenFilter ...");
              /**
               * 从 request 的 header 中拿出来 token
               */
              String token = request.getHeader("token");
              if (token == null || token.isEmpty()) {
                  // 没有携带 token 则 放行
                  filterChain.doFilter(request, response);
                  return;
              }
              /**
               * 检查 token 是否过期逻辑 .....
               */
              // 放行
              filterChain.doFilter(request, response);
          }
      }
      

      检查是否登录过期过滤器

      import lombok.extern.slf4j.Slf4j;
      import org.springframework.stereotype.Component;
      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;
      /**
       * 请求日志
       *
       * @author francis
       * @create: 2023-08-31 10:15
       **/
      @Component
      @Slf4j
      public class OperationLogFilter extends OncePerRequestFilter {
          @Override
          protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
              log.info("OperationLogFilter ...");
              /**
               * 操作日志记录 ...
               */
              // 放行
              filterChain.doFilter(request, response);
          }
      }
      

      SecurityConfiguration 配置

      import com.security.filter.JwtAuthenticationTokenFilter;
      import com.security.filter.OperationLogFilter;
      import org.springframework.beans.factory.annotation.Autowired;
      import org.springframework.context.annotation.Bean;
      import org.springframework.context.annotation.Configuration;
      import org.springframework.security.authentication.AuthenticationManager;
      import org.springframework.security.config.annotation.web.builders.HttpSecurity;
      import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
      import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
      import org.springframework.security.config.http.SessionCreationPolicy;
      import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
      /**
       * Security 配置类
       *
       * @author francis
       * @create: 2023-08-30 14:19
       **/
      @Configuration
      @EnableWebSecurity
      public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
          @Autowired
          private JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;
          @Autowired
          private OperationLogFilter operationLogFilter;
          @Override
          protected void configure(HttpSecurity http) throws Exception {
              http
                      // 关闭csrf
                      .csrf().disable()
                      // 不通过 Session 获取 SecurityContext
                      .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                      .and()
                          .authorizeRequests()
                              // 对于登录接口 允许匿名访问
                              .antMatchers("/login")
                                  .permitAll()
                              // 除上面外的所有请求全部需要鉴权认证
                              .anyRequest()
                                  .authenticated();
              // 在 UsernamePasswordAuthenticationFilter（验证用户） 之前执行
              // TODO 需要注意的是下面过滤器的顺序就是执行的顺序，使用 @Order 也没办法改变
              http
              		// 登录是否过期
                      .addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class)
                      // 请求日志
                      .addFilterBefore(operationLogFilter, UsernamePasswordAuthenticationFilter.class);
          }
          @Bean
          @Override
          public AuthenticationManager authenticationManagerBean() throws Exception {
              return super.authenticationManagerBean();
          }
      }
      

      End
       
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