{
  "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

[Note]
If the object is larger than 8 MB, the AWS Command Line Interface splits the object into multiple parts and uploads them. The part object is stored in a bucket called {bucket}+segments It is saved in the form of part-number{object-name}/{upload-id}/{part-number}, and when all parts are uploaded, an object linked to the part object is created in the bucket requested for upload.

The {bucket}+segments bucket where the part object is stored cannot be accessed through the S3 compatible API, but can be accessed through the Object Storage API or the console.

The ETag of a multipart object is an MD5 hashed value by converting the ETag values of each part object into binary data and concatenating them in order.

[Caution]
If you delete some or all parts of an object uploaded as multipart, the object cannot be accessed.

$ 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)

[Note] The number of part objects is determined by the size of the object being uploaded and the part size you set. The default part size is 8MiB, and you can specify an object size as small as 5MiB. The maximum number of part objects is 1000.

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);
    }
}

[Note] The number of part objects is determined by the size of the object being uploaded and the part size you set. The default part size is 5MiB, and you can specify an object size as small as 5MiB. The maximum number of part objects is 1000.

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;
    }
}

[Note] The number of part objects is determined by the size of the object being uploaded and the part size you set. The default part size is 5MiB, and you can set the object size as small as 5MiB. The maximum number of part objects is 1000.

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;
    }
}