feat: CustomLogoutFilter 구현

- 로그아웃 요청 발생 시 catch 하여 토큰 만료 처리 진행

Author: ysw789

src/main/java/dmu/dasom/api/global/auth/filter/CustomLogoutFilter.java

@@ -0,0 +1,38 @@
+package dmu.dasom.api.global.auth.filter;
+
+import dmu.dasom.api.global.auth.jwt.JwtUtil;
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import java.io.IOException;
+
+@Component
+@RequiredArgsConstructor
+public class CustomLogoutFilter extends OncePerRequestFilter {
+
+    private static final String LOGOUT_URI = "/api/auth/logout";
+
+    private final JwtUtil jwtUtil;
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
+        // 로그아웃 요청 검증
+        if (request.getRequestURI().equals(LOGOUT_URI) && request.getMethod().equals(HttpMethod.POST.name()) && SecurityContextHolder.getContext().getAuthentication() != null) {
+            // 로그아웃 요청 시 토큰 만료 처리
+            jwtUtil.blacklistTokens(SecurityContextHolder.getContext().getAuthentication().getName());
+            response.setStatus(HttpStatus.OK.value());
+            return;
+        }
+
+        filterChain.doFilter(request, response);
+    }
+
+}