Generate S3 Presigned-url

build.gradle

@@ -58,6 +58,7 @@ dependencies {
     // aws - s3
     implementation group: 'org.springframework.cloud', name: 'spring-cloud-starter-aws', version: '2.2.6.RELEASE'
     testImplementation group: 'io.findify', name: 's3mock_2.12', version: '0.2.6'
+    testImplementation group: 'software.amazon.awssdk', name: 's3', version: '2.20.151'
 
     // sentry
     implementation 'io.sentry:sentry-spring-boot-starter-jakarta:6.27.0'

src/main/java/org/swmaestro/repl/gifthub/vouchers/controller/VoucherController.java

@@ -13,13 +13,12 @@
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
-import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.bind.annotation.RestController;
-import org.springframework.web.multipart.MultipartFile;
 import org.swmaestro.repl.gifthub.util.HttpJsonHeaders;
 import org.swmaestro.repl.gifthub.util.JwtProvider;
 import org.swmaestro.repl.gifthub.util.Message;
 import org.swmaestro.repl.gifthub.util.StatusEnum;
+import org.swmaestro.repl.gifthub.vouchers.dto.PresignedUrlResponseDto;
 import org.swmaestro.repl.gifthub.vouchers.dto.VoucherSaveRequestDto;
 import org.swmaestro.repl.gifthub.vouchers.dto.VoucherUpdateRequestDto;
 import org.swmaestro.repl.gifthub.vouchers.dto.VoucherUseRequestDto;
@@ -44,21 +43,21 @@ public class VoucherController {
 	private final StorageService storageService;
 	private final JwtProvider jwtProvider;
 
-	@PostMapping("/images")
-	@Operation(summary = "Voucher 이미지 등록 메서드", description = "클라이언트에서 요청한 기프티콘 이미지를 Amazon S3에 저장하기 위한 메서드입니다.")
+	@GetMapping("/images")
+	@Operation(summary = "Voucher 이미지 등록 메서드", description = "클라이언트에서 요청한 기프티콘 이미지를 Amazon S3에 저장하기 위한 메서드입니다. 요청 시 S3 PreSigned URL이 반환됩니다.")
 	@ApiResponses({
-			@ApiResponse(responseCode = "200", description = "기프티콘 이미지 등록 성공"),
-			@ApiResponse(responseCode = "400(404)", description = "존재하지 않는 브랜드 조회 시도")
+			@ApiResponse(responseCode = "200", description = "성공적으로 S3 Presigned URL 반환"),
 	})
-	public ResponseEntity<Message> saveVoucherImage(@RequestPart("image_file") MultipartFile imageFile) throws IOException {
-		return new ResponseEntity<>(
-				Message.builder()
-						.status(StatusEnum.OK)
-						.message("기프티콘 이미지가 성공적으로 등록되었습니다!")
-						.data(storageService.save(voucherDirName, imageFile))
-						.build(),
-				new HttpJsonHeaders(),
-				HttpStatus.OK
+	public ResponseEntity<Message> saveVoucherImage() throws IOException {
+		PresignedUrlResponseDto presignedUrlResponseDto = PresignedUrlResponseDto.builder()
+				.presignedUrl(storageService.getPresignedUrlForSaveVoucher("voucher", "PNG"))
+				.build();
+
+		return ResponseEntity.ok(Message.builder()
+				.status(StatusEnum.OK)
+				.message("성공적으로 S3 Presigned URL 반환되었습니다!")
+				.data(presignedUrlResponseDto)
+				.build()
 		);
 	}
 

src/main/java/org/swmaestro/repl/gifthub/vouchers/dto/PresignedUrlResponseDto.java

@@ -0,0 +1,21 @@
+package org.swmaestro.repl.gifthub.vouchers.dto;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)
+public class PresignedUrlResponseDto {
+	private String presignedUrl;
+
+	@Builder
+	public PresignedUrlResponseDto(String presignedUrl) {
+		this.presignedUrl = presignedUrl;
+	}
+}

src/main/java/org/swmaestro/repl/gifthub/vouchers/service/StorageService.java

@@ -2,14 +2,17 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Date;
 import java.util.UUID;
 
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 import org.springframework.web.multipart.MultipartFile;
 import org.swmaestro.repl.gifthub.vouchers.dto.S3FileDto;
 
+import com.amazonaws.HttpMethod;
 import com.amazonaws.services.s3.AmazonS3Client;
+import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
 import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.PutObjectRequest;
 
@@ -57,4 +60,12 @@ private String getUUidFileName(String fileName) {
 	public String getDefaultImagePath(String dirName) {
 		return "http://" + bucketName + "/" + dirName + "/" + defaultImageFile;
 	}
+
+	public String getPresignedUrlForSaveVoucher(String dirName, String extension) {
+		String key = dirName + "/" + UUID.randomUUID().toString() + "." + extension;
+		GeneratePresignedUrlRequest generatePresignedUrlRequest =
+				new GeneratePresignedUrlRequest(bucketName, key, HttpMethod.PUT)
+						.withExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 5));
+		return amazonS3Client.generatePresignedUrl(generatePresignedUrlRequest).toString();
+	}
 }