{
  "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.nhncloudservice.com s3 mb s3://example-bucket
make_bucket: example-bucket

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

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

$ aws --endpoint-url=https://kr1-api-object-storage.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.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.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 8MiB이며, 파트 오브젝트의 최대 개수는 1000개입니다.

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 5MiB이며, 파트 오브젝트의 최대 개수는 1000개입니다.

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 5MiB이며, 파트 오브젝트의 최대 개수는 1000개입니다.

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;
    }
}