인터셉터 1

 

스프링 인터셉터 순서

 

was -> DispatcherServlet -> preHandle -> 핸들러 어댑터 -> 핸들러(컨트롤러) -> postHandle -> view -> afterCompletion

 

만약 핸들러(컨트롤러에서 오류가 날경우) postHandle은 작동하지 않는다. 하지만 afterCompletion은 작동한다. 그래서 afterCompletion에서는 오류를 파라미터로 받아서 표시 할 수 있다.

 

 

 

로그인터셉터

package hello.login.web.Interceptor;

import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import lombok.extern.slf4j.Slf4j;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.UUID;

@Slf4j
public class LogInterceptor implements HandlerInterceptor {

    public static final String LOG_ID = "logId";

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestURI = request.getRequestURI();
        String uuid = UUID.randomUUID().toString();

        request.setAttribute(LOG_ID,uuid);

        //@RequestMapping : HandlerMethod
        //정적 리소스 : ResourceHttpRequestHandler
        if(handler instanceof HandlerMethod) {
            HandlerMethod hm = (HandlerMethod) handler; //호출할 컨트롤러 메서드의 모든 정보가 포함되어 있다.
        }

        log.info("REQUEST [{}][{}][{}}",uuid,requestURI,handler);

        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("postHendle[{}]",modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
        String requestURI = request.getRequestURI();
        Object logId = request.getAttribute(LOG_ID);

        log.info("RESPONSE[{}][{}}[{}]",logId,requestURI,handler);

        if(ex != null){
            log.error("afterCompletion Error",ex);

        }
    }
}

 

 

등록

package hello.login;

import hello.login.web.Interceptor.LogInterceptor;
import hello.login.web.filter.LogFilter;
import hello.login.web.filter.LoginCheckFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import javax.servlet.Filter;

@Configuration
public class WebConfig implements WebMvcConfigurer {//WebMvcConfigurer은 인터셉터 등록 시 필요

    // 오버라이드 단축키 command + N
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LogInterceptor())
                .order(1)
                .addPathPatterns("/**")//허용 패턴
                .excludePathPatterns("/css/**","/*.ico","/error"); //미허용 패턴
    }

 //   @Bean
    public FilterRegistrationBean logFilter(){
        FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<>();
        filterRegistrationBean.setFilter(new LogFilter()); //만든 필터를 넣는다.
        filterRegistrationBean.setOrder(1); //작동 순서를 정한다.
        filterRegistrationBean.addUrlPatterns("/*"); //어떤 url일 때에 작동할지를 적는다.

        return filterRegistrationBean;

    }

    //@Bean
    public FilterRegistrationBean loginFilter(){
        FilterRegistrationBean<Filter> filterRegistrationBean = new FilterRegistrationBean<>();
        filterRegistrationBean.setFilter(new LoginCheckFilter()); //만든 필터를 넣는다.
        filterRegistrationBean.setOrder(2); //작동 순서를 정한다.
        filterRegistrationBean.addUrlPatterns("/*"); //어떤 url일 때에 작동할지를 적는다.

        return filterRegistrationBean;

    }

}