FEAT: (#47) Refresh Token 구현

src/main/java/com/zerozero/auth/AuthenticationResponse.java

@@ -11,5 +11,6 @@
 @NoArgsConstructor
 public class AuthenticationResponse {
 
-  private String token;
+  private String accessToken;
+  private String refreshToken;
 }

src/main/java/com/zerozero/auth/DuplicateEmailException.java

@@ -1,7 +1,7 @@
 package com.zerozero.auth;
 
-import com.zerozero.core.exception.error.ErrorCode;
 import com.zerozero.core.exception.ServiceException;
+import com.zerozero.core.exception.error.ErrorCode;
 
 public class DuplicateEmailException extends ServiceException {
 

src/main/java/com/zerozero/auth/DuplicateNicknameException.java

@@ -1,7 +1,7 @@
 package com.zerozero.auth;
 
-import com.zerozero.core.exception.error.ErrorCode;
 import com.zerozero.core.exception.ServiceException;
+import com.zerozero.core.exception.error.ErrorCode;
 
 public class DuplicateNicknameException extends ServiceException {
 

src/main/java/com/zerozero/auth/InvalidTokenException.java

@@ -0,0 +1,11 @@
+package com.zerozero.auth;
+
+import com.zerozero.core.exception.ServiceException;
+import com.zerozero.core.exception.error.ErrorCode;
+
+public class InvalidTokenException extends ServiceException {
+
+  public InvalidTokenException() {
+    super(ErrorCode.INVALID_TOKEN_EXCEPTION);
+  }
+}

src/main/java/com/zerozero/auth/TokenDto.java

@@ -0,0 +1,12 @@
+package com.zerozero.auth;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class TokenDto {
+
+  private String accessToken;
+  private String refreshToken;
+}

src/main/java/com/zerozero/auth/TokenRequest.java

@@ -0,0 +1,9 @@
+package com.zerozero.auth;
+
+import lombok.Getter;
+
+@Getter
+public class TokenRequest {
+
+  private String refreshToken;
+}

src/main/java/com/zerozero/auth/UserNotFoundException.java

@@ -1,7 +1,7 @@
 package com.zerozero.auth;
 
-import com.zerozero.core.exception.error.ErrorCode;
 import com.zerozero.core.exception.ServiceException;
+import com.zerozero.core.exception.error.ErrorCode;
 
 public class UserNotFoundException extends ServiceException {
 

src/main/java/com/zerozero/auth/application/AuthenticationService.java

@@ -1,15 +1,20 @@
 package com.zerozero.auth.application;
 
 import com.zerozero.auth.AuthenticationRequest;
-import com.zerozero.user.Role;
-import com.zerozero.core.domain.entity.User;
-import com.zerozero.core.domain.infra.repository.UserJPARepository;
-import com.zerozero.auth.RegisterRequest;
 import com.zerozero.auth.AuthenticationResponse;
 import com.zerozero.auth.DuplicateEmailException;
 import com.zerozero.auth.DuplicateNicknameException;
+import com.zerozero.auth.InvalidTokenException;
+import com.zerozero.auth.RegisterRequest;
+import com.zerozero.auth.TokenDto;
 import com.zerozero.auth.UserNotFoundException;
+import com.zerozero.core.domain.entity.RefreshToken;
+import com.zerozero.core.domain.entity.User;
+import com.zerozero.core.domain.infra.repository.RefreshTokenRepository;
+import com.zerozero.core.domain.infra.repository.UserJPARepository;
 import com.zerozero.core.util.JwtService;
+import com.zerozero.user.Role;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
@@ -24,6 +29,7 @@ public class AuthenticationService {
   private final PasswordEncoder passwordEncoder;
   private final JwtService jwtService;
   private final AuthenticationManager authenticationManager;
+  private final RefreshTokenRepository refreshTokenRepository;
 
   public AuthenticationResponse register(RegisterRequest request) {
     User user = User.builder()
@@ -34,10 +40,11 @@ public AuthenticationResponse register(RegisterRequest request) {
         .build();
 
     userJPARepository.save(user);
-    String jwtToken = jwtService.generateToken(user);
+    TokenDto tokens = jwtService.generateToken(user);
 
     return AuthenticationResponse.builder()
-        .token(jwtToken)
+        .accessToken(tokens.getAccessToken())
+        .refreshToken(tokens.getRefreshToken())
         .build();
   }
 
@@ -46,10 +53,20 @@ public AuthenticationResponse authenticate(AuthenticationRequest request) {
         new UsernamePasswordAuthenticationToken(request.getEmail(), request.getPassword()));
 
     User user = userJPARepository.findByEmail(request.getEmail()).orElseThrow(UserNotFoundException::new);
-    String jwtToken = jwtService.generateToken(user);
+    TokenDto tokens = jwtService.generateToken(user);
+
+    Optional<RefreshToken> refreshToken = refreshTokenRepository.findByUser(user);
+
+    if (refreshToken.isPresent()) {
+      refreshTokenRepository.save(refreshToken.get().update(tokens.getRefreshToken()));
+    } else {
+      RefreshToken newRefreshToken = new RefreshToken(tokens.getRefreshToken(), user);
+      refreshTokenRepository.save(newRefreshToken);
+    }
 
     return AuthenticationResponse.builder()
-        .token(jwtToken)
+        .accessToken(tokens.getAccessToken())
+        .refreshToken(tokens.getRefreshToken())
         .build();
   }
 
@@ -64,4 +81,22 @@ public void checkNickname(String nickname) {
       throw new DuplicateNicknameException();
     }
   }
+
+  public AuthenticationResponse refreshToken(String refreshToken) {
+
+    String userEmail = jwtService.extractUsername(refreshToken);
+    if (userEmail != null) {
+      User user = userJPARepository.findByEmail(userEmail).orElseThrow(UserNotFoundException::new);
+      String storedRefreshToken = refreshTokenRepository.findByUser(user).orElseThrow(
+          InvalidTokenException::new).getRefreshToken();
+      if (storedRefreshToken.equals(refreshToken) && jwtService.isTokenValid(refreshToken, user)) {
+        TokenDto tokens = jwtService.generateToken(user);
+        return AuthenticationResponse.builder()
+            .accessToken(tokens.getAccessToken())
+            .refreshToken(refreshToken)
+            .build();
+      }
+    }
+    throw new InvalidTokenException();
+  }
 }

src/main/java/com/zerozero/auth/presentation/AuthenticationController.java

@@ -1,9 +1,10 @@
 package com.zerozero.auth.presentation;
 
-import com.zerozero.auth.application.AuthenticationService;
 import com.zerozero.auth.AuthenticationRequest;
-import com.zerozero.auth.RegisterRequest;
 import com.zerozero.auth.AuthenticationResponse;
+import com.zerozero.auth.RegisterRequest;
+import com.zerozero.auth.TokenRequest;
+import com.zerozero.auth.application.AuthenticationService;
 import com.zerozero.core.presentation.ApiResponse;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
@@ -49,4 +50,10 @@ public ApiResponse<String> checkNickname(@PathVariable String nickname) {
     service.checkNickname(nickname);
     return ApiResponse.ok();
   }
+
+  @Operation(summary = "리프레시 토큰", description = "액세스 토큰 만료시, 리프레시 토큰을 이용해 액세스 토큰을 재발급합니다.")
+  @PostMapping("/refresh-token")
+  public ApiResponse<AuthenticationResponse> refreshToken(@RequestBody TokenRequest request) {
+    return ApiResponse.ok(service.refreshToken(request.getRefreshToken()));
+  }
 }

src/main/java/com/zerozero/configuration/filter/ExceptionHandleFilter.java

@@ -1,9 +1,9 @@
 package com.zerozero.configuration.filter;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.zerozero.core.exception.ServiceException;
 import com.zerozero.core.exception.error.ErrorCode;
 import com.zerozero.core.presentation.ErrorResponse;
-import com.zerozero.core.exception.ServiceException;
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
@@ -32,7 +32,7 @@ private void sendErrorResponse(HttpServletResponse response, ErrorCode errorCode
     response.setCharacterEncoding("UTF-8");
     response.setContentType("application/json");
     ObjectMapper objectMapper = new ObjectMapper();
-    ErrorResponse errorResponse = ErrorResponse.of(errorCode);
+    ErrorResponse errorResponse = ErrorResponse.from(errorCode);
     Map<String, ErrorResponse> result = new HashMap<>();
     result.put("result", errorResponse);
     response.getWriter().write(objectMapper.writeValueAsString(result));

src/main/java/com/zerozero/configuration/filter/JwtAuthenticationFilter.java

@@ -26,6 +26,11 @@ public class JwtAuthenticationFilter extends OncePerRequestFilter {
   protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
       FilterChain filterChain) throws ServletException, IOException {
 
+    if (request.getServletPath().contains("/api/v1/auth")) {
+      filterChain.doFilter(request, response);
+      return;
+    }
+
     final String authHeader = request.getHeader("Authorization");
     final String jwt;
     final String userEmail;

src/main/java/com/zerozero/configuration/filter/JwtExceptionFilter.java

@@ -1,12 +1,16 @@
 package com.zerozero.configuration.filter;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.zerozero.core.exception.error.ErrorCode;
+import com.zerozero.core.presentation.ErrorResponse;
 import io.jsonwebtoken.JwtException;
 import jakarta.servlet.FilterChain;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
-import org.springframework.http.HttpStatus;
+import java.util.HashMap;
+import java.util.Map;
 import org.springframework.web.filter.OncePerRequestFilter;
 
 public class JwtExceptionFilter extends OncePerRequestFilter {
@@ -18,13 +22,18 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
     try {
       filterChain.doFilter(request, response);
     } catch (JwtException e) {
-      sendErrorResponse(HttpStatus.UNAUTHORIZED, response, e);
+      sendErrorResponse(response, ErrorCode.EXPIRED_JWT_EXCEPTION);
     }
   }
 
-  private void sendErrorResponse(HttpStatus status, HttpServletResponse response, Exception e) throws IOException {
-    response.setStatus(status.value());
+  private void sendErrorResponse(HttpServletResponse response, ErrorCode errorCode) throws IOException {
+    response.setStatus(errorCode.getHttpStatus());
+    response.setCharacterEncoding("UTF-8");
     response.setContentType("application/json");
-    response.getWriter().write("{\"error\": \"" + e.getMessage() + "\"}");
+    ObjectMapper objectMapper = new ObjectMapper();
+    ErrorResponse errorResponse = ErrorResponse.from(errorCode);
+    Map<String, ErrorResponse> result = new HashMap<>();
+    result.put("result", errorResponse);
+    response.getWriter().write(objectMapper.writeValueAsString(result));
   }
 }

src/main/java/com/zerozero/configuration/security/ApplicationConfiguration.java

@@ -1,7 +1,7 @@
 package com.zerozero.configuration.security;
 
-import com.zerozero.core.domain.infra.repository.UserJPARepository;
 import com.zerozero.auth.UserNotFoundException;
+import com.zerozero.core.domain.infra.repository.UserJPARepository;
 import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;

src/main/java/com/zerozero/core/domain/entity/RefreshToken.java

@@ -0,0 +1,38 @@
+package com.zerozero.core.domain.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToOne;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Getter
+public class RefreshToken {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  private String refreshToken;
+
+  @OneToOne(fetch = FetchType.LAZY)
+  @JoinColumn(name = "user_id")
+  private User user;
+
+  public RefreshToken(String refreshToken, User user) {
+    this.refreshToken = refreshToken;
+    this.user = user;
+  }
+
+  public RefreshToken update(String refreshToken) {
+    this.refreshToken = refreshToken;
+    return this;
+  }
+}

src/main/java/com/zerozero/core/domain/entity/Review.java

@@ -1,8 +1,8 @@
 package com.zerozero.core.domain.entity;
 
-import com.zerozero.review.ZeroDrinks;
-import com.zerozero.review.ReviewRequest;
 import com.zerozero.core.domain.shared.BaseEntity;
+import com.zerozero.review.ReviewRequest;
+import com.zerozero.review.ZeroDrinks;
 import jakarta.persistence.CollectionTable;
 import jakarta.persistence.ElementCollection;
 import jakarta.persistence.Entity;

src/main/java/com/zerozero/core/domain/entity/Store.java

@@ -1,7 +1,7 @@
 package com.zerozero.core.domain.entity;
 
-import com.zerozero.external.naver.SearchLocalResponse.SearchLocalItem;
 import com.zerozero.core.domain.shared.BaseEntity;
+import com.zerozero.external.naver.SearchLocalResponse.SearchLocalItem;
 import jakarta.persistence.ElementCollection;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;

src/main/java/com/zerozero/core/domain/infra/repository/RefreshTokenRepository.java

@@ -0,0 +1,10 @@
+package com.zerozero.core.domain.infra.repository;
+
+import com.zerozero.core.domain.entity.RefreshToken;
+import com.zerozero.core.domain.entity.User;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface RefreshTokenRepository extends JpaRepository<RefreshToken, Long> {
+  Optional<RefreshToken> findByUser(User user);
+}

src/main/java/com/zerozero/core/exception/ExceptionManager.java

@@ -10,7 +10,7 @@ public class ExceptionManager {
 
   @ExceptionHandler(ServiceException.class)
   public ApiResponse<?> handleException(ServiceException e) {
-    ErrorResponse errorResponse = ErrorResponse.of(e.getErrorCode());
+    ErrorResponse errorResponse = ErrorResponse.from(e.getErrorCode());
     return ApiResponse.fail(errorResponse, errorResponse.getCode());
   }
 }

src/main/java/com/zerozero/core/exception/error/ErrorCode.java

@@ -14,7 +14,9 @@ public enum ErrorCode {
   STORE_NOT_FOUND_EXCEPTION(404, "STORE_NOT_FOUND_EXCEPTION", "판매점이 존재하지 않습니다."),
   REVIEW_NOT_FOUND_EXCEPTION(404, "REVIEW_NOT_FOUND_EXCEPTION", "리뷰가 존재하지 않습니다."),
   ACCESS_DENIED_EXCEPTION(500, "ACCESS_DENIED_EXCEPTION", "권한이 없습니다."),
-  ALREADY_REVIEWED_EXCEPTION(409, "ALREADY_REVIEWED_EXCEPTION", "해당 판매점에 리뷰가 이미 등록돼있습니다.");
+  ALREADY_REVIEWED_EXCEPTION(409, "ALREADY_REVIEWED_EXCEPTION", "해당 판매점에 리뷰가 이미 등록돼있습니다."),
+  INVALID_TOKEN_EXCEPTION(404, "INVALID_TOKEN_EXCEPTION", "유효하지 않은 토큰입니다."),
+  EXPIRED_JWT_EXCEPTION(401, "EXPIRED_JWT_EXCEPTION", "토큰이 만료되었습니다.");
 
   private final int httpStatus;
   private final String code;

src/main/java/com/zerozero/core/presentation/ErrorResponse.java

@@ -15,7 +15,7 @@ public ErrorResponse(ErrorCode errorCode) {
     this.code = errorCode.getCode();
   }
 
-  public static ErrorResponse of(ErrorCode errorCode) {
+  public static ErrorResponse from(ErrorCode errorCode) {
     return new ErrorResponse(errorCode);
   }
 }