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S3Service.java
S3Service.java 2.82 KiB
package umc.spring.file.service;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.HttpMethod;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.CannedAccessControlList;
import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import java.io.IOException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Date;
/* S3Service.java */
@Slf4j
@RequiredArgsConstructor
@Service
public class S3Service {
@Value("${cloud.aws.s3.bucket}")
private String bucket;
private final AmazonS3 amazonS3;
/* 1. 파일 업로드 */
public String upload(MultipartFile multipartFile, String s3FileName) throws IOException {
// 메타데이터 생성
ObjectMetadata objMeta = new ObjectMetadata();
objMeta.setContentLength(multipartFile.getInputStream().available());
// putObject(버킷명, 파일명, 파일데이터, 메타데이터)로 S3에 객체 등록
amazonS3.putObject(new PutObjectRequest(bucket, s3FileName, multipartFile.getInputStream(), objMeta)
.withCannedAcl(CannedAccessControlList.PublicRead));
// 등록된 객체의 url 반환 (decoder: url 안의 한글 or 특수문자 깨짐 방지)
return URLDecoder.decode(amazonS3.getUrl(bucket, s3FileName).toString(), "utf-8");
}
/* 2. 파일 삭제 */
public void delete (String keyName) {
try {
// deleteObject(버킷명, 키값)으로 객체 삭제
amazonS3.deleteObject(bucket, keyName);
} catch (AmazonServiceException e) {
log.error(e.toString());
}
}
/* 3. 파일의 presigned URL 반환 */
public String getPresignedURL (String keyName) {
String preSignedURL = "";
// presigned URL이 유효하게 동작할 만료기한 설정 (2분)
Date expiration = new Date();
Long expTimeMillis = expiration.getTime();
expTimeMillis += 1000 * 60 * 2;
expiration.setTime(expTimeMillis);
try {
// presigned URL 발급
GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucket, keyName)
.withMethod(HttpMethod.GET)
.withExpiration(expiration);
URL url = amazonS3.generatePresignedUrl(generatePresignedUrlRequest);
preSignedURL = url.toString();
} catch (Exception e) {
log.error(e.toString());
}
return preSignedURL;
}
}