[#29] refresh token 재발급 API 추가

src/main/java/com/dnd/dndtravel/auth/controller/AuthController.java

@@ -1,10 +1,12 @@
 package com.dnd.dndtravel.auth.controller;
 
+import com.dnd.dndtravel.auth.controller.request.ReIssueTokenRequest;
 import com.dnd.dndtravel.auth.service.dto.response.AppleIdTokenPayload;
 import com.dnd.dndtravel.auth.service.AppleOAuthService;
 import com.dnd.dndtravel.auth.service.JwtTokenService;
 import com.dnd.dndtravel.auth.controller.request.AppleLoginRequest;
 import com.dnd.dndtravel.auth.service.dto.response.TokenResponse;
+import com.dnd.dndtravel.auth.service.dto.response.ReissueTokenResponse;
 import com.dnd.dndtravel.member.domain.Member;
 import com.dnd.dndtravel.member.service.MemberService;
 
@@ -41,4 +43,9 @@ public ResponseEntity<TokenResponse> appleOAuthLogin(@RequestBody AppleLoginRequ
 
         return ResponseEntity.ok(tokenResponse);
     }
+
+    @PostMapping("/reissue/token")
+    public ReissueTokenResponse reissueToken(@RequestBody ReIssueTokenRequest reissueTokenRequest) {
+        return jwtTokenService.reIssue(reissueTokenRequest.refreshToken());
+    }
 }

src/main/java/com/dnd/dndtravel/auth/controller/request/ReIssueTokenRequest.java

@@ -0,0 +1,6 @@
+package com.dnd.dndtravel.auth.controller.request;
+
+public record ReIssueTokenRequest(
+	String refreshToken
+) {
+}

src/main/java/com/dnd/dndtravel/auth/repository/RefreshTokenRepository.java

@@ -1,10 +1,15 @@
 package com.dnd.dndtravel.auth.repository;
 
+
+import java.util.Optional;
+
 import com.dnd.dndtravel.auth.domain.RefreshToken;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface RefreshTokenRepository extends JpaRepository<RefreshToken, Long> {
     RefreshToken findByMemberId(Long memberId);
+
+    Optional<RefreshToken> findByRefreshToken(String refreshToken);
 }

src/main/java/com/dnd/dndtravel/auth/service/JwtProvider.java

@@ -37,9 +37,8 @@ public String accessToken(Long memberId) {
             .compact();
     }
 
-    public String refreshToken(Long memberId) {
+    public String refreshToken() {
         return Jwts.builder()
-            .claim(CLAIM_CONTENT, memberId)
             .issuedAt(new Date(System.currentTimeMillis()))
             .expiration(new Date(System.currentTimeMillis() + this.refreshTokenExpiredTime))
             .signWith(secretKey)

src/main/java/com/dnd/dndtravel/auth/service/JwtTokenService.java

@@ -6,6 +6,7 @@
 import com.dnd.dndtravel.auth.domain.RefreshToken;
 import com.dnd.dndtravel.auth.repository.RefreshTokenRepository;
 import com.dnd.dndtravel.auth.service.dto.response.TokenResponse;
+import com.dnd.dndtravel.auth.service.dto.response.ReissueTokenResponse;
 
 import lombok.RequiredArgsConstructor;
 
@@ -21,7 +22,7 @@ public TokenResponse generateTokens(Long memberId) {
 		RefreshToken refreshToken = refreshTokenRepository.findByMemberId(memberId);
 
 		if (refreshToken == null) {
-			String newRefreshToken = jwtProvider.refreshToken(memberId);
+			String newRefreshToken = jwtProvider.refreshToken();
 			refreshTokenRepository.save(RefreshToken.of(memberId, newRefreshToken)); // refreshToken은 DB에 저장
 			return new TokenResponse(jwtProvider.accessToken(memberId), newRefreshToken);
 		} else if (refreshToken.isExpire()) {
@@ -30,4 +31,16 @@ public TokenResponse generateTokens(Long memberId) {
 
 		return new TokenResponse(jwtProvider.accessToken(memberId), null);
 	}
+
+	@Transactional
+	public ReissueTokenResponse reIssue(String token) {
+		//validation
+		RefreshToken refreshToken = refreshTokenRepository.findByRefreshToken(token).orElseThrow(() -> new RuntimeException("유효하지 않은 토큰"));
+
+		//RTR
+		refreshTokenRepository.delete(refreshToken);
+		String newRefreshToken = jwtProvider.refreshToken();
+		refreshTokenRepository.save(RefreshToken.of(refreshToken.getMemberId(), newRefreshToken));
+		return new ReissueTokenResponse(jwtProvider.accessToken(refreshToken.getMemberId()), newRefreshToken);
+	}
 }

src/main/java/com/dnd/dndtravel/auth/service/dto/response/ReissueTokenResponse.java

@@ -0,0 +1,7 @@
+package com.dnd.dndtravel.auth.service.dto.response;
+
+public record ReissueTokenResponse(
+	String accessToken,
+	String refreshToken
+) {
+}