[스프링부트] 34. 인터셉터

✅ WebMvcConfig – 인터셉터 설정 정리

📌 목적

package shop.mtcoding.blog._core.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import shop.mtcoding.blog._core.interceptor.LoginInterceptor;

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        WebMvcConfigurer.super.addInterceptors(registry);
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/user/**")
                .addPathPatterns("/board/**")
                .addPathPatterns("/love/**")
                .addPathPatterns("/reply/**")
                .addPathPatterns("/api/**")
                .excludePathPatterns("/board/{id:\\d+}"); // 정규 표현식
    }
}

✅ LoginInterceptor – 로그인 인증 인터셉터

📌 역할

package shop.mtcoding.blog._core.interceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.web.servlet.HandlerInterceptor;
import shop.mtcoding.blog._core.erorr.ex.Exception401;
import shop.mtcoding.blog._core.erorr.ex.ExceptionApi401;
import shop.mtcoding.blog.user.User;

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String uri = request.getRequestURI();
        System.out.println("uri: " + uri);

        HttpSession session = request.getSession();
        User sessionUser = (User) session.getAttribute("sessionUser");

        if (sessionUser == null) {
            if (uri.contains("/api")) {
                throw new ExceptionApi401("인증이 필요합니다");
//                response.setStatus(401);
//                response.setHeader("Content-Type", "application/json");
//                PrintWriter out = response.getWriter();
//                Resp<?> resp = Resp.fail(401, "인증이 필요합니다");
//                ObjectMapper mapper = new ObjectMapper();
//                String responseBody = mapper.writeValueAsString(resp);
//                out.println(responseBody);
//                return false;
            } else {
                throw new Exception401("인증이 필요합니다");
//                response.setStatus(401);
//                response.setHeader("Content-Type", "text/html");
//                PrintWriter out = response.getWriter();
//                out.println(Script.href("인증이 필요합니다", "/login-form"));
//                return false;
            }
        }

        return true;
    }
}