스프링 서블릿 필터 - 요청 로그

필터

chain.doFilter 무조건 해줘야한다. 안해주면 웹 동작 안함

package hello.login.web.filter;

import lombok.extern.slf4j.Slf4j;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.UUID;

@Slf4j
public class LogFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        log.info("log filter init");
    }


    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        log.info("log filter doFilter");
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        String requestURI = httpRequest.getRequestURI();
        String uuid = UUID.randomUUID().toString();

        try{
            log.info("REQUEST [{}][{}]", uuid, requestURI);
            // 다음 필터 호출 , 없으면 서블릿
            chain.doFilter(request, response);
        } catch (Exception e){
            throw e;
        }finally {
            log.info("RESPONSE [{}][{}]",uuid,requestURI);
        }

    }


    @Override
    public void destroy() {
        log.info("log filter destroy");
    }


}

 

스프링 빈 등록

package hello.login;

import hello.login.web.filter.LogFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.Filter;

@Configuration
public class WebConfig {

    @Bean
    public FilterRegistrationBean logFilter(){
        FilterRegistrationBean<Filter> filterFilterRegistrationBean = new FilterRegistrationBean<>();
        filterFilterRegistrationBean.setFilter(new LogFilter());
        filterFilterRegistrationBean.setOrder(1);
        filterFilterRegistrationBean.addUrlPatterns("/*");

        return filterFilterRegistrationBean;
    }
}

같은 요청