refresh 토큰 유효성 검증, 엑세스 토큰 재발급 API 구현 완료

src/main/java/com/chzzk/cushion/member/application/MemberService.java

@@ -1,5 +1,9 @@
 package com.chzzk.cushion.member.application;
 
+import static com.chzzk.cushion.global.exception.ErrorCode.INVALID_JWT_TOKEN;
+
+import com.chzzk.cushion.global.exception.CushionException;
+import com.chzzk.cushion.global.jwt.JwtTokenProvider;
 import com.chzzk.cushion.member.domain.Member;
 import com.chzzk.cushion.member.domain.MemberRepository;
 import com.chzzk.cushion.member.dto.ApiMember;
@@ -23,6 +27,7 @@
 public class MemberService {
 
     private final MemberRepository memberRepository;
+    private final JwtTokenProvider jwtTokenProvider;
 
     @Transactional
     public void logout(HttpServletRequest request, HttpServletResponse response, Authentication authentication) {
@@ -64,4 +69,30 @@ private void clearCookies(HttpServletRequest request, HttpServletResponse respon
             log.info("쿠키가 존재하지 않습니다.");
         }
     }
+
+    public String reissueAccessToken(HttpServletRequest request) {
+        Cookie[] cookies = request.getCookies();
+        for (Cookie cookie : cookies) {
+            String name = cookie.getName();
+            if (name.equals("refreshToken")) {
+                String refreshToken = cookie.getValue();
+                Long memberId = jwtTokenProvider.extractMemberId(refreshToken);
+                jwtTokenProvider.validateToken(refreshToken);
+                return jwtTokenProvider.reissueAccessToken(refreshToken, memberId);
+            }
+        }
+        return null;
+    }
+
+    public boolean validateToken(HttpServletRequest request) {
+        Cookie[] cookies = request.getCookies();
+        for (Cookie cookie : cookies) {
+            String name = cookie.getName();
+            if (name.equals("refreshToken")) {
+                String refreshToken = cookie.getValue();
+                return jwtTokenProvider.validateToken(refreshToken);
+            }
+        }
+        throw new CushionException(INVALID_JWT_TOKEN);
+    }
 }

src/main/java/com/chzzk/cushion/member/presentation/MemberController.java

@@ -72,9 +72,15 @@ public void deleteMember(HttpServletRequest request, HttpServletResponse respons
 
     }
 
-    @GetMapping("/validate")
-    @Operation(summary = "토큰 유효성 검증", description = "토큰의 유효성을 검증합니다.")
-    public void validateToken(@Parameter(hidden = true) @RequestHeader("Authorization") String token) {
-        jwtTokenProvider.validateToken(token);
+    @GetMapping("/validate-token")
+    @Operation(summary = "refresh 토큰 유효성 검증", description = "refresh 토큰의 유효성을 검증합니다.")
+    public boolean validateToken(HttpServletRequest request) {
+        return memberService.validateToken(request);
+    }
+
+    @GetMapping("/reissue")
+    @Operation(summary = "액세스 토큰 재발급", description = "만료된 액세스 토큰을 재발급 받는다.")
+    public String reissueAccessToken(HttpServletRequest request) {
+        return memberService.reissueAccessToken(request);
     }
 }