SecurityConfig.java

package DiffLens.back_end.global.security;

import DiffLens.back_end.global.responses.code.status.error.AuthStatus;
import DiffLens.back_end.global.responses.code.status.success.AuthSuccessStatus;
import DiffLens.back_end.global.responses.exception.ApiResponse;
import com.fasterxml.jackson.databind.ObjectMapper;
import jakarta.servlet.http.HttpServletResponse;
import lombok.RequiredArgsConstructor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.method.configuration.EnableMethodSecurity;
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.WebSecurityCustomizer;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.annotation.web.configurers.HeadersConfigurer;
import org.springframework.security.config.annotation.web.configurers.LogoutConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

@EnableWebSecurity
@Configuration
@RequiredArgsConstructor
@EnableMethodSecurity(prePostEnabled = true)
public class SecurityConfig {

    private final CustomLogoutHandler customLogoutHandler;
    private final SecurityAllowOrigins securityProperties;
    private final JwtAuthenticationFilter jwtAuthenticationFilter;

    @Bean
    public WebSecurityCustomizer webSecurityCustomizer() {
        return web -> web.ignoring().requestMatchers("/error", "/favicon.ico");
    }

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {

        http.formLogin(AbstractHttpConfigurer::disable)
                .httpBasic(AbstractHttpConfigurer::disable)
                .csrf(AbstractHttpConfigurer::disable)
                .cors(cors -> cors.configurationSource(corsConfigurationSource()))
                .headers(headers -> headers.frameOptions(HeadersConfigurer.FrameOptionsConfig::disable))
                .sessionManagement(session -> session.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .authorizeHttpRequests(request -> request
                        .requestMatchers(
                                "/images/**",
                                "/swagger-ui/**",
                                "/v3/api-docs/**",
                                "/auth/signup/**",
                                "/auth/login/**",
                                "/auth/reissue",
                                "/oauth2/**",
                                "/actuator/prometheus"
//                                "/admin/**"
                        ).permitAll()
                        .anyRequest().authenticated()
                )
                .addFilterBefore(jwtAuthenticationFilter,
                        UsernamePasswordAuthenticationFilter.class)
                .logout(this::configureLogout);

        return http.build();
    }

    // 로그아웃 처리
    private void configureLogout(LogoutConfigurer<HttpSecurity> logout) {

        ObjectMapper objectMapper = new ObjectMapper();

        logout
                .logoutUrl("/auth/logout")
                .addLogoutHandler(customLogoutHandler)
                .logoutSuccessHandler((request, response, authentication) -> {
                    response.setStatus(HttpServletResponse.SC_OK);
                    response.setContentType("application/json;charset=UTF-8");

                    ApiResponse<?> apiResponse = ApiResponse.onSuccess(AuthSuccessStatus.LOGOUT_SUCCESS);
                    response.getWriter().write(objectMapper.writeValueAsString(apiResponse));
                });
    }

    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();

        securityProperties.getAllowedOrigins().forEach(configuration::addAllowedOriginPattern);
        configuration.setAllowCredentials(true);
        configuration.addAllowedMethod("*");
        configuration.setMaxAge(3600L);

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}