Infra: 운영환경 동기화

개발환경(application-dev.yml)에 맞게 운영환경(application-prod.yml) 변경
- AWS S3 관련 설정 추가

Author: namgigun

src/main/java/com/back/domain/file/controller/FileController.java

@@ -19,9 +19,9 @@ public class FileController {
     private final FileService fileService;
 
     @PostMapping
-    public ResponseEntity<RsData<List<String>>> uploadFile(List<MultipartFile> multipartFiles) {
+    public ResponseEntity<RsData<String>> uploadFile(MultipartFile multipartFile) {
         return ResponseEntity
                 .status(HttpStatus.OK)
-                .body(RsData.success("파일 업로드 성공", fileService.uploadFile(multipartFiles)));
+                .body(RsData.success("파일 업로드 성공", fileService.uploadFile(multipartFile)));
     }
 }

src/main/java/com/back/domain/file/service/FileService.java

@@ -4,6 +4,8 @@
 import com.amazonaws.services.s3.model.CannedAccessControlList;
 import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.PutObjectRequest;
+import com.back.global.exception.CustomException;
+import com.back.global.exception.ErrorCode;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpStatus;
@@ -24,25 +26,25 @@ public class FileService {
 
     private final AmazonS3 amazonS3;
 
-    public List<String> uploadFile(List<MultipartFile> multipartFiles) {
-        List<String> fileNameList = new ArrayList<>();
-
-        multipartFiles.forEach(file -> {
-                    String fileName = file.getOriginalFilename();
-                    ObjectMetadata objectMetadata = new ObjectMetadata();
-                    objectMetadata.setContentLength(file.getSize());
-                    objectMetadata.setContentType(file.getContentType());
-
-                    try (InputStream inputStream = file.getInputStream()) {
-                        amazonS3.putObject(new PutObjectRequest(bucket, fileName, inputStream, objectMetadata)
-                                .withCannedAcl(CannedAccessControlList.PublicRead));
-                    } catch (IOException e) {
-                        throw new ResponseStatusException(HttpStatus.INTERNAL_SERVER_ERROR, "파일 업로드에 실패했습니다.");
-                    }
-
-                    fileNameList.add(fileName);
-                });
-
-        return fileNameList;
+    public String uploadFile(MultipartFile multipartFile) {
+        if (multipartFile == null || multipartFile.isEmpty()) {
+            return null;
+        }
+
+        String fileName = multipartFile.getName();
+        ObjectMetadata objectMetadata = new ObjectMetadata();
+        objectMetadata.setContentLength(multipartFile.getSize());
+        objectMetadata.setContentType(multipartFile.getContentType());
+
+        try(InputStream inputStream = multipartFile.getInputStream()){
+            amazonS3.putObject(
+                    new PutObjectRequest(bucket, fileName, inputStream, objectMetadata
+                    )
+            );
+        } catch (IOException e){
+            throw new CustomException(ErrorCode.FILE_UPLOAD_FAILED);
+        }
+
+        return fileName;
     }
 }

src/main/java/com/back/global/config/S3Config.java

@@ -27,4 +27,4 @@ public AmazonS3Client s3Client() {
                 .withCredentials(new AWSStaticCredentialsProvider(awsCred))
                 .build();
     }
-}
+}

src/main/java/com/back/global/exception/ErrorCode.java

@@ -121,11 +121,16 @@ public enum ErrorCode {
     OAUTH2_ATTRIBUTE_MISSING(HttpStatus.UNAUTHORIZED, "AUTH_009", "소셜 계정에서 필요한 사용자 정보를 가져올 수 없습니다."),
     OAUTH2_AUTHENTICATION_FAILED(HttpStatus.UNAUTHORIZED, "AUTH_010", "소셜 로그인 인증에 실패했습니다."),
 
+    // ======================== 파일 업로드 관련 ========================
+    FILE_UPLOAD_FAILED(HttpStatus.INTERNAL_SERVER_ERROR, "FILE_001", "파일 업로드에 실패했습니다."),
+
+
     // ======================== 토큰 관련 ========================
     INVALID_EMAIL_TOKEN(HttpStatus.UNAUTHORIZED, "TOKEN_001", "유효하지 않은 이메일 인증 토큰입니다."),
     ALREADY_VERIFIED(HttpStatus.CONFLICT, "TOKEN_002", "이미 인증된 계정입니다."),
     INVALID_PASSWORD_RESET_TOKEN(HttpStatus.UNAUTHORIZED, "TOKEN_003", "유효하지 않은 비밀번호 재설정 토큰입니다.");
 
+
     private final HttpStatus status;
     private final String code;
     private final String message;

src/main/resources/application-prod.yml

@@ -1,4 +1,7 @@
 spring:
+  config:
+    import: optional:file:.env[.properties]
+
   datasource:
     url: jdbc:mysql://${MYSQL_HOST}:${MYSQL_PORT}/${MYSQL_DATABASE}?serverTimezone=Asia/Seoul&characterEncoding=UTF-8
     driver-class-name: com.mysql.cj.jdbc.Driver
@@ -11,9 +14,6 @@ spring:
       port: 6379
       password: ${REDIS_PASSWORD}
 
-  config:
-    import: optional:file:.env[.properties]
-
   jpa:
     database-platform: org.hibernate.dialect.MySQLDialect
     hibernate:
@@ -111,4 +111,20 @@ studyroom:
     allow-screen-share: true
 
 frontend:
-  base-url: ${FRONTEND_BASE_URL}
+  base-url: ${FRONTEND_BASE_URL}
+
+# AWS S3
+cloud:
+  aws:
+    credentials:
+      access-key: ${ACCESS_KEY}
+      secret-key: ${SECRET_KEY}
+
+    region:
+      static: ${REGION}
+
+    s3:
+      bucket: ${BUCKET_NAME}
+
+    stack:
+      auto: false