feat: 서버에서 이미지 s3 업로드 구현

backend/src/main/java/com/funeat/common/exception/CommonException.java

@@ -0,0 +1,25 @@
+package com.funeat.common.exception;
+
+import com.funeat.exception.CommonErrorCode;
+import com.funeat.exception.ErrorCode;
+import com.funeat.exception.GlobalException;
+import org.springframework.http.HttpStatus;
+
+public class CommonException extends GlobalException {
+
+    public CommonException(final HttpStatus status, final ErrorCode errorCode) {
+        super(status, errorCode);
+    }
+
+    public static class NotAllowedFileExtensionException extends CommonException {
+        public NotAllowedFileExtensionException(final CommonErrorCode errorCode, final String extension) {
+            super(errorCode.getStatus(), new ErrorCode<>(errorCode.getCode(), errorCode.getMessage(), extension));
+        }
+    }
+
+    public static class S3UploadFailException extends CommonException {
+        public S3UploadFailException(final CommonErrorCode errorCode) {
+            super(errorCode.getStatus(), new ErrorCode<>(errorCode.getCode(), errorCode.getMessage()));
+        }
+    }
+}

backend/src/main/java/com/funeat/common/s3/S3Uploader.java

@@ -1,7 +1,17 @@
 package com.funeat.common.s3;
 
+import static com.funeat.exception.CommonErrorCode.IMAGE_EXTENSION_ERROR_CODE;
+import static com.funeat.exception.CommonErrorCode.UNKNOWN_SERVER_ERROR_CODE;
+
 import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+import com.amazonaws.services.s3.model.PutObjectRequest;
 import com.funeat.common.ImageUploader;
+import com.funeat.common.exception.CommonException.NotAllowedFileExtensionException;
+import com.funeat.common.exception.CommonException.S3UploadFailException;
+import java.io.IOException;
+import java.util.UUID;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Profile;
 import org.springframework.stereotype.Component;
@@ -11,6 +21,9 @@
 @Profile("!test")
 public class S3Uploader implements ImageUploader {
 
+    public static final String JPEG = "image/jpeg";
+    public static final String PNG = "image/png";
+
     @Value("${cloud.aws.s3.bucket}")
     private String bucket;
 
@@ -25,7 +38,42 @@ public S3Uploader(final AmazonS3 amazonS3) {
 
     @Override
     public String upload(final MultipartFile image) {
+        validateExtension(image);
+        final ObjectMetadata metadata = getMetadata(image);
+        final String key = getKey(image);
+        try {
+            amazonS3.putObject(getPutObjectRequest(image, key, metadata));
+            return amazonS3.getUrl(bucket, key).toString();
+        } catch (IOException e) {
+            throw new S3UploadFailException(UNKNOWN_SERVER_ERROR_CODE);
+        }
+    }
+
+    private void validateExtension(final MultipartFile image) {
+        final String contentType = image.getContentType();
+        if (!contentType.equals(JPEG) && !contentType.equals(PNG)) {
+            throw new NotAllowedFileExtensionException(IMAGE_EXTENSION_ERROR_CODE, contentType);
+        }
+    }
+
+    private String getKey(final MultipartFile image) {
+        return folder + getRandomImageName(image);
+    }
+
+    private String getRandomImageName(final MultipartFile image) {
+        return UUID.randomUUID() + image.getOriginalFilename();
+    }
+
+    private ObjectMetadata getMetadata(final MultipartFile image) {
+        final ObjectMetadata metadata = new ObjectMetadata();
+        metadata.setContentType(image.getContentType());
+        metadata.setContentLength(image.getSize());
+        return metadata;
+    }
 
-        return null;
+    private PutObjectRequest getPutObjectRequest(final MultipartFile image, final String key,
+                                                 final ObjectMetadata metadata) throws IOException {
+        return new PutObjectRequest(bucket, key, image.getInputStream(), metadata)
+                .withCannedAcl(CannedAccessControlList.PublicRead);
     }
 }

backend/src/main/java/com/funeat/exception/CommonErrorCode.java

@@ -6,6 +6,7 @@ public enum CommonErrorCode {
 
     UNKNOWN_SERVER_ERROR_CODE(HttpStatus.INTERNAL_SERVER_ERROR, "알 수 없는 에러입니다.", "0000"),
     REQUEST_VALID_ERROR_CODE(HttpStatus.BAD_REQUEST, "요청을 다시 확인해주세요.", "0001"),
+    IMAGE_EXTENSION_ERROR_CODE(HttpStatus.BAD_REQUEST, "파일 확장자를 확인해주세요.", "0002"),
     ;
 
     private final HttpStatus status;