{
  "tenant_id": "84c9e9a51aea402e95389c08ac562ac5"
}

{
  "credential": {
    "access": "253a3c7ca27f4731a9c757addfac29ca",
    "tenant_id": "84c9e9a51aea402e95389c08ac562ac5",
    "secret": "be057f235abf45ee8e2ba14edc5fb253",
    "user_id": "84db0c80-3c39-11e7-b29c-005056ac1497",
    "trust_id": null
  }
}

{
  "credentials": [
    {
      "access": "253a3c7ca27f4731a9c757addfac29ca",
      "tenant_id": "84c9e9a51aea402e95389c08ac562ac5",
      "secret": "be057f235abf45ee8e2ba14edc5fb253",
      "user_id": "84db0c80-3c39-11e7-b29c-005056ac1497",
      "trust_id": null
    }
  ]
}

<?xml version='1.0' encoding='UTF-8'?>
<ListAllMyBucketsResult
    xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <Owner>
        <ID>user:panther</ID>
        <DisplayName>user:panther</DisplayName>
    </Owner>
    <Buckets>
        <Bucket>
            <Name>log</Name>
            <CreationDate>2009-02-03T16:45:09.000Z</CreationDate>
        </Bucket>
        <Bucket>
            <Name>snapshot</Name>
            <CreationDate>2009-02-03T16:45:09.000Z</CreationDate>
        </Bucket>
    </Buckets>
</ListAllMyBucketsResult>

<?xml version='1.0' encoding='UTF-8'?>
<ListBucketResult
    xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <Name>snapshot</Name>
    <Prefix/>
    <Marker/>
    <MaxKeys>1000</MaxKeys>
    <IsTruncated>false</IsTruncated>
    <Contents>
        <Key>cheetah</Key>
        <LastModified>2023-02-01T04:49:52.995Z</LastModified>
        <ETag>"7d793037a0760186574b0282f2f435e7"</ETag>
        <Size>5</Size>
        <Owner>
            <ID>user:panther</ID>
            <DisplayName>user:panther</DisplayName>
        </Owner>
        <StorageClass>STANDARD</StorageClass>
    </Contents>
    <Contents>
        <Key>leopard</Key>
        <LastModified>2023-02-01T04:49:52.685Z</LastModified>
        <ETag>"5d41402abc4b2a76b9719d911017c592"</ETag>
        <Size>5</Size>
        <Owner>
            <ID>user:panther</ID>
            <DisplayName>user:panther</DisplayName>
        </Owner>
        <StorageClass>STANDARD</StorageClass>
    </Contents>
</ListBucketResult>

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 mb s3://example-bucket
make_bucket: example-bucket

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 ls
2020-07-13 10:07:13 example-bucket

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 ls s3://example-bucket
2020-07-13 10:08:49     104389 0428b9e3e419d4fb7aedffde984ba5b3.jpg
2020-07-13 10:09:09      74448 6dd6d48eef889a5dab5495267944bdc6.jpg

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 rb s3://example-bucket
remove_bucket: example-bucket

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 cp ./3b5ab489edffdea7bf4d914e3e9b8240.jpg s3://example-bucket/3b5ab489edffdea7bf4d914e3e9b8240.jpg
upload: ./3b5ab489edffdea7bf4d914e3e9b8240.jpg to s3://example-bucket/3b5ab489edffdea7bf4d914e3e9b8240.jpg

[참고]
오브젝트의 용량이 8MB 이상이면 AWS 명령줄 인터페이스는 오브젝트를 여러 개의 파트로 나누어 업로드합니다. 파트 오브젝트는 {bucket}+segments라는 버킷에 {object-name}/{upload-id}/{part-number} 형태의 이름으로 저장되고, 모든 파트 업로드가 끝나면 업로드 요청한 버킷에 파트 오브젝트를 연결한 오브젝트가 만들어집니다.

파트 오브젝트가 저장되는 {bucket}+segments 버킷은 S3 호환 API로는 접근할 수 없고, Object Storage API 또는 콘솔을 통해 접근할 수 있습니다.

멀티파트 오브젝트의 ETag는 각 파트 오브젝트의 ETag 값을 이진 데이터로 변환하고 순서대로 연결해(concatenate) MD5 해시한 값입니다.

[주의]
멀티파트로 업로드한 오브젝트의 일부 또는 전체 파트 오브젝트를 삭제하면 오브젝트에 접근할 수 없습니다.

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 cp s3://example-bucket/3b5ab489edffdea7bf4d914e3e9b8240.jpg ./3b5ab489edffdea7bf4d914e3e9b8240.jpg
download: s3://example-bucket/0428b9e3e419d4fb7aedffde984ba5b3.jpg to ./0428b9e3e419d4fb7aedffde984ba5b3.jpg

$ aws --endpoint-url=https://kr1-api-object-storage.gov-nhncloudservice.com s3 rm s3://example-bucket/3b5ab489edffdea7bf4d914e3e9b8240.jpg
delete: s3://example-bucket/3b5ab489edffdea7bf4d914e3e9b8240.jpg

# boto3example.py
from boto3 import client
from boto3.s3.transfer import TransferConfig
from botocore.exceptions import ClientError


class Boto3Example(object):
    _REGION = '{region name}'
    _ENDPOINT = '{endpoint}'
    _ACCESS = '{access}'
    _SECRET = '{secret}'

    def __init__(self):
        self.s3 = client(service_name='s3',
                         region_name=self._REGION,
                         endpoint_url=self._ENDPOINT,
                         aws_access_key_id=self._ACCESS,
                         aws_secret_access_key=self._SECRET)

def create_bucket(self, bucket_name):
    try:
        return self.s3.create_bucket(Bucket=bucket_name)
    except ClientError as e:
        raise RuntimeError(e)

def list_buckets(self):
    try:
        return self.s3.list_buckets().get('Buckets')
    except ClientError as e:
        raise RuntimeError(e)

def list_objs(self, bucket_name):
    try:
        return self.s3.list_objects_v2(Bucket=bucket_name).get('Contents')
    except ClientError as e:
        raise RuntimeError(e)

def delete_bucket(self, bucket_name):
    try:
        return self.s3.delete_bucket(Bucket=bucket_name)
    except ClientError as e:
        raise RuntimeError(e)

[참고] 파트 오브젝트의 개수는 업로드할 오브젝트의 용량과 설정한 파트 크기에 의해 결정됩니다. 기본 파트 크기는 8MiB이고, 최소 5MiB부터 지정할 수 있습니다. 파트 오브젝트의 최대 개수는 1,000개입니다.

def upload(self, bucket_name, key, filename, part_size):
    config = TransferConfig(multipart_chunksize=part_size)
    try:
        self.s3.upload_file(Filename=filename,
                            Bucket=bucket_name,
                            Key=key,
                            Config=config)
    except ClientError as e:
        raise RuntimeError(e)

def download(self, bucket_name, key, filename):
    try:
        response = self.s3.get_object(Bucket=bucket_name, Key=key)

        with io.FileIO(filename, 'w') as fd:
            for chunk in response['Body']:
                fd.write(chunk)

        response.pop('Body')
    except ClientError as e:
        raise RuntimeError(e)
    except OSError as e:
        raise RuntimeError(e)

    return response

def delete(self, bucket_name, key):
    try:
        return self.s3.delete_object(Bucket=bucket_name, Key=key)
    except ClientError as e:
        raise RuntimeError(e)

// AwsSdkExample.java
public class AwsSdkExample {
    private static final String access = "{access}";
    private static final String secret = "{secret}";
    private static final String region = "{region name}";
    private static final String ednpoint = "{endpoint}";

    private AmazonS3 s3Client;

    public AwsSdkExample() {
        BasicAWSCredentials awsCredentials =
            new BasicAWSCredentials(access, secret);
        s3Client = AmazonS3ClientBuilder.standard()
            .withEndpointConfiguration(
                new AwsClientBuilder.EndpointConfiguration(ednpoint, region)
            )
            .withCredentials(
                new AWSStaticCredentialsProvider(awsCredentials)
            )
            .enablePathStyleAccess()
            .disableChunkedEncoding()
            .build();
    }
}

public String createBucket(String bucketName) throws RuntimeException {
    try {
        return s3Client.createBucket(bucketName).toString();
    } catch (AmazonServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

public List<Bucket> listBuckets() throws RuntimeException {
    try {
        return s3Client.listBuckets();
    } catch (AmazonServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

public ListObjectsV2Result listObjects(
    String bucketName
) throws RuntimeException {
    try {
        return s3Client.listObjectsV2(bucketName);
    } catch (AmazonServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

public void deleteBucket(String bucketName) throws RuntimeException {
    try {
        s3Client.deleteBucket(bucketName);
    } catch (AmazonServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

[참고] 파트 오브젝트의 개수는 업로드할 오브젝트의 용량과 설정한 파트 크기에 의해 결정됩니다. 기본 파트 크기는 5MiB이고, 최소 5MiB부터 지정할 수 있습니다. 파트 오브젝트의 최대 개수는 1,000개입니다.

public void uploadObject(String bucketName, String objectKey, String filePath, long partSize) {
    TransferManager tm = TransferManagerBuilder.standard()
        .withS3Client(s3Client)
        .withMinimumUploadPartSize(partSize)
        .build();
    Upload upload = tm.upload(bucketName, objectKey, new File(filePath));

    try {
        upload.waitForCompletion();
    } catch (AmazonServiceException e) {
        upload.abort();
    } catch (AmazonClientException e) {
        upload.abort();
    } catch (InterruptedException e) {
        upload.abort();
    }
}

public String downloadObject(
    String bucketName, String objKeyName, String filePath
) throws RuntimeException {
    try {
        return s3Client.getObject(
            new GetObjectRequest(bucketName, objKeyName),
            new File(filePath)
        ).getETag();
    } catch (NoSuchKeyException e) {
        throw new RuntimeException(e);
    } catch (InvalidObjectStateException e) {
        throw new RuntimeException(e);
    } catch (S3Exception e) {
        throw new RuntimeException(e);
    } catch (AwsServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

public void deleteObject(
    String bucketName, String objKeyName
) throws RuntimeException {
    try {
        s3Client.deleteObject(bucketName, objKeyName);
    } catch (AmazonServiceException e) {
        throw new RuntimeException(e);
    } catch (SdkClientException e) {
        throw new RuntimeException(e);
    }
}

class S3SDKExample
{
    private static string endpoint = "{endpoint}";
    private static string regionName = "{region name}";
    private static string accessKey = "{access}";
    private static string secretKey = "{secret}";

    private static AmazonS3Client GetS3Client()
    {
        var amazonS3Config =
            new AmazonS3Config
            {
                ServiceURL = endpoint,
                AuthenticationRegion = regionName,
                ForcePathStyle = true,
            };
        var basicAWSCredentials = new BasicAWSCredentials(accessKey, secretKey);

        return new AmazonS3Client(basicAWSCredentials, amazonS3Config);
    }
}

static async Task<PutBucketResponse> CreateBucketAsync(
    AmazonS3Client s3Client,
    string bucketName)
{
    try
    {
        if (!(await AmazonS3Util.DoesS3BucketExistAsync(s3Client, bucketName)))
        {
            var putBucketRequest =
                new PutBucketRequest
                {
                    BucketName = bucketName,
                    UseClientRegion = true
                };

            return await s3Client.PutBucketAsync(putBucketRequest);
        }
        throw new Exception("Bucket already exist.");
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}

static async Task<ListBucketsResponse> ListBucketsAsync(AmazonS3Client s3Client)
{
    try
    {
        return await s3Client.ListBucketsAsync();
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}

static async Task<List<ListObjectsV2Response>> ListBucketContentsAsync(
    AmazonS3Client s3Client,
    string bucketName)
{
    try
    {
        List<ListObjectsV2Response> responses =
            new List<ListObjectsV2Response>();
        var request =
            new ListObjectsV2Request
            {
                BucketName = bucketName,
                MaxKeys = 5,
            };
        var response = new ListObjectsV2Response();

        do
        {
            responses.Add(await s3Client.ListObjectsV2Async(request));
            request.ContinuationToken = response.NextContinuationToken;
        }
        while (response.IsTruncated);

        return responses;
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}

static async Task<DeleteBucketResponse> DeleteBucketAsync(
    AmazonS3Client s3Client,
    string bucketName)
{
    try
    {
        return await s3Client.DeleteBucketAsync(
            new DeleteBucketRequest
            {
                BucketName = bucketName
            });
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}

[참고] 파트 오브젝트의 개수는 업로드할 오브젝트의 용량과 설정한 파트 크기에 의해 결정됩니다. 기본 파트 크기는 5MiB이고, 최소 5MiB부터 지정할 수 있습니다. 파트 오브젝트의 최대 개수는 1,000개입니다.

private static async Task UploadObjectAsync(
    AmazonS3Client s3Client,
    string bucketName,
    string keyName,
    string filePath,
    int partSize)
{
    try
    {
        TransferUtility uploader = new TransferUtility(s3Client);
        TransferUtilityUploadRequest uploadRequest = new TransferUtilityUploadRequest()
        {
            FilePath = filePath,
            BucketName = bucketName,
            Key = keyName,
            PartSize = partSize
        };
        uploader.Upload(uploadRequest);
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}

static async Task ReadObjectDataAsync(
    AmazonS3Client s3Client,
    string bucketName,
    string keyName,
    string filePath)
{
    try
    {
        GetObjectRequest request =
            new GetObjectRequest
            {
                BucketName = bucketName,
                Key = keyName
            };

        ResponseHeaderOverrides responseHeaders =
            new ResponseHeaderOverrides();
        responseHeaders.CacheControl = "No-cache";

        request.ResponseHeaderOverrides = responseHeaders;
        var appendToFile = false;

        using (var response = await s3Client.GetObjectAsync(request))
        await response.WriteResponseStreamToFileAsync(
            filePath, appendToFile, CancellationToken.None);
    }
    catch (AmazonS3Exception e)
    {
       throw e;
    }
}

static async Task<DeleteObjectResponse> DeleteObjectNonVersionedBucketAsync(
    AmazonS3Client s3Client,
    string bucketName,
    string keyName)
{
    try
    {
        var deleteObjectRequest =
            new DeleteObjectRequest
            {
                BucketName = bucketName,
                Key = keyName
            };

        return await s3Client.DeleteObjectAsync(deleteObjectRequest);
    }
    catch (AmazonS3Exception e)
    {
        throw e;
    }
}