s3manager

package
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Published: Aug 3, 2023 License: Apache-2.0 Imports: 21 Imported by: 0

Documentation

Overview

Package s3manager provides utilities to upload and download objects from S3 concurrently. Helpful for when working with large objects.

Index

Examples

Constants

View Source
const (
	// DefaultBatchSize is the batch size we initialize when constructing a batch delete client.
	// This value is used when calling DeleteObjects. This represents how many objects to delete
	// per DeleteObjects call.
	DefaultBatchSize = 100
)
View Source
const DefaultDownloadConcurrency = 5

DefaultDownloadConcurrency is the default number of goroutines to spin up when using Download().

View Source
const DefaultDownloadPartSize = 1024 * 1024 * 5

DefaultDownloadPartSize is the default range of bytes to get at a time when using Download().

View Source
const DefaultUploadConcurrency = 5

DefaultUploadConcurrency is the default number of goroutines to spin up when using Upload().

View Source
const DefaultUploadPartSize = MinUploadPartSize

DefaultUploadPartSize is the default part size to buffer chunks of a payload into.

View Source
const (
	// ErrDeleteBatchFailCode represents an error code which will be returned
	// only when DeleteObjects.Errors has an error that does not contain a code.
	ErrDeleteBatchFailCode = "DeleteBatchError"
)
View Source
const MaxUploadParts = 10000

MaxUploadParts is the maximum allowed number of parts in a multi-part upload on Amazon S3.

View Source
const MinUploadPartSize int64 = 1024 * 1024 * 5

MinUploadPartSize is the minimum allowed part size when uploading a part to Amazon S3.

Variables

This section is empty.

Functions

func GetBucketRegion

func GetBucketRegion(ctx aws.Context, c client.ConfigProvider, bucket, regionHint string, opts ...request.Option) (string, error)

GetBucketRegion will attempt to get the region for a bucket using the regionHint to determine which AWS partition to perform the query on.

The request will not be signed, and will not use your AWS credentials.

A "NotFound" error code will be returned if the bucket does not exist in the AWS partition the regionHint belongs to. If the regionHint parameter is an empty string GetBucketRegion will fallback to the ConfigProvider's region config. If the regionHint is empty, and the ConfigProvider does not have a region value, an error will be returned..

For example to get the region of a bucket which exists in "eu-central-1" you could provide a region hint of "us-west-2".

sess := session.Must(session.NewSession())

bucket := "my-bucket"
region, err := s3manager.GetBucketRegion(ctx, sess, bucket, "us-west-2")
if err != nil {
    if aerr, ok := err.(awserr.Error); ok && aerr.Code() == "NotFound" {
         fmt.Fprintf(os.Stderr, "unable to find bucket %s's region not found\n", bucket)
    }
    return err
}
fmt.Printf("Bucket %s is in %s region\n", bucket, region)

By default the request will be made to the Amazon S3 endpoint using the Path style addressing.

s3.us-west-2.amazonaws.com/bucketname

This is not compatible with Amazon S3's FIPS endpoints. To override this behavior to use Virtual Host style addressing, provide a functional option that will set the Request's Config.S3ForcePathStyle to aws.Bool(false).

region, err := s3manager.GetBucketRegion(ctx, sess, "bucketname", "us-west-2", func(r *request.Request) {
    r.S3ForcePathStyle = aws.Bool(false)
})

To configure the GetBucketRegion to make a request via the Amazon S3 FIPS endpoints directly when a FIPS region name is not available, (e.g. fips-us-gov-west-1) set the Config.Endpoint on the Session, or client the utility is called with. The hint region will be ignored if an endpoint URL is configured on the session or client.

sess, err := session.NewSession(&aws.Config{
    Endpoint: aws.String("https://s3-fips.us-west-2.amazonaws.com"),
})

region, err := s3manager.GetBucketRegion(context.Background(), sess, "bucketname", "")

func GetBucketRegionWithClient

func GetBucketRegionWithClient(ctx aws.Context, svc s3iface.S3API, bucket string, opts ...request.Option) (string, error)

GetBucketRegionWithClient is the same as GetBucketRegion with the exception that it takes a S3 service client instead of a Session. The regionHint is derived from the region the S3 service client was created in.

By default the request will be made to the Amazon S3 endpoint using the Path style addressing.

s3.us-west-2.amazonaws.com/bucketname

This is not compatible with Amazon S3's FIPS endpoints. To override this behavior to use Virtual Host style addressing, provide a functional option that will set the Request's Config.S3ForcePathStyle to aws.Bool(false).

region, err := s3manager.GetBucketRegionWithClient(ctx, client, "bucketname", func(r *request.Request) {
    r.S3ForcePathStyle = aws.Bool(false)
})

To configure the GetBucketRegion to make a request via the Amazon S3 FIPS endpoints directly when a FIPS region name is not available, (e.g. fips-us-gov-west-1) set the Config.Endpoint on the Session, or client the utility is called with. The hint region will be ignored if an endpoint URL is configured on the session or client.

region, err := s3manager.GetBucketRegionWithClient(context.Background(),
s3.New(sess, &aws.Config{
    Endpoint: aws.String("https://s3-fips.us-west-2.amazonaws.com"),
}),
"bucketname")

See GetBucketRegion for more information.

func NewBatchError

func NewBatchError(code, message string, err []Error) awserr.Error

NewBatchError will return a BatchError that satisfies the awserr.Error interface.

func WithDownloaderRequestOptions

func WithDownloaderRequestOptions(opts ...request.Option) func(*Downloader)

WithDownloaderRequestOptions appends to the Downloader's API request options.

func WithUploaderRequestOptions

func WithUploaderRequestOptions(opts ...request.Option) func(*Uploader)

WithUploaderRequestOptions appends to the Uploader's API request options.

Types

type BatchDelete

type BatchDelete struct {
	Client    s3iface.S3API
	BatchSize int
}

BatchDelete will use the s3 package's service client to perform a batch delete.

func NewBatchDelete

func NewBatchDelete(c client.ConfigProvider, options ...func(*BatchDelete)) *BatchDelete

NewBatchDelete will return a new delete client that can delete a batched amount of objects.

Example:

batcher := s3manager.NewBatchDelete(sess, size)

objects := []BatchDeleteObject{
	{
		Object:	&s3.DeleteObjectInput {
			Key: aws.String("key"),
			Bucket: aws.String("bucket"),
		},
	},
}

if err := batcher.Delete(aws.BackgroundContext(), &s3manager.DeleteObjectsIterator{
	Objects: objects,
}); err != nil {
	return err
}

func NewBatchDeleteWithClient

func NewBatchDeleteWithClient(client s3iface.S3API, options ...func(*BatchDelete)) *BatchDelete

NewBatchDeleteWithClient will return a new delete client that can delete a batched amount of objects.

Example:

batcher := s3manager.NewBatchDeleteWithClient(client, size)

objects := []BatchDeleteObject{
	{
		Object:	&s3.DeleteObjectInput {
			Key: aws.String("key"),
			Bucket: aws.String("bucket"),
		},
	},
}

if err := batcher.Delete(aws.BackgroundContext(), &s3manager.DeleteObjectsIterator{
	Objects: objects,
}); err != nil {
	return err
}

func (*BatchDelete) Delete

func (d *BatchDelete) Delete(ctx aws.Context, iter BatchDeleteIterator) error

Delete will use the iterator to queue up objects that need to be deleted. Once the batch size is met, this will call the deleteBatch function.

type BatchDeleteIterator

type BatchDeleteIterator interface {
	Next() bool
	Err() error
	DeleteObject() BatchDeleteObject
}

BatchDeleteIterator is an interface that uses the scanner pattern to iterate through what needs to be deleted.

func NewDeleteListIterator

func NewDeleteListIterator(svc s3iface.S3API, input *s3.ListObjectsInput, opts ...func(*DeleteListIterator)) BatchDeleteIterator

NewDeleteListIterator will return a new DeleteListIterator.

type BatchDeleteObject

type BatchDeleteObject struct {
	Object *s3.DeleteObjectInput
	// After will run after each iteration during the batch process. This function will
	// be executed whether or not the request was successful.
	After func() error
}

BatchDeleteObject is a wrapper object for calling the batch delete operation.

type BatchDownloadIterator

type BatchDownloadIterator interface {
	Next() bool
	Err() error
	DownloadObject() BatchDownloadObject
}

BatchDownloadIterator is an interface that uses the scanner pattern to iterate through a series of objects to be downloaded.

type BatchDownloadObject

type BatchDownloadObject struct {
	Object *s3.GetObjectInput
	Writer io.WriterAt
	// After will run after each iteration during the batch process. This function will
	// be executed whether or not the request was successful.
	After func() error
}

BatchDownloadObject contains all necessary information to run a batch operation once.

type BatchError

type BatchError struct {
	Errors Errors
	// contains filtered or unexported fields
}

BatchError will contain the key and bucket of the object that failed to either upload or download.

func (*BatchError) Code

func (err *BatchError) Code() string

Code will return the code associated with the batch error.

func (*BatchError) Error

func (err *BatchError) Error() string

func (*BatchError) Message

func (err *BatchError) Message() string

Message will return the message associated with the batch error.

func (*BatchError) OrigErr

func (err *BatchError) OrigErr() error

OrigErr will return the original error. Which, in this case, will always be nil for batched operations.

type BatchUploadIterator

type BatchUploadIterator interface {
	Next() bool
	Err() error
	UploadObject() BatchUploadObject
}

BatchUploadIterator is an interface that uses the scanner pattern to iterate through what needs to be uploaded.

type BatchUploadObject

type BatchUploadObject struct {
	Object *UploadInput
	// After will run after each iteration during the batch process. This function will
	// be executed whether or not the request was successful.
	After func() error
}

BatchUploadObject contains all necessary information to run a batch operation once.

type BufferedReadSeeker

type BufferedReadSeeker struct {
	// contains filtered or unexported fields
}

BufferedReadSeeker is buffered io.ReadSeeker

func NewBufferedReadSeeker

func NewBufferedReadSeeker(r io.ReadSeeker, b []byte) *BufferedReadSeeker

NewBufferedReadSeeker returns a new BufferedReadSeeker if len(b) == 0 then the buffer will be initialized to 64 KiB.

func (*BufferedReadSeeker) Read

func (b *BufferedReadSeeker) Read(p []byte) (n int, err error)

Read will read up len(p) bytes into p and will return the number of bytes read and any error that occurred. If the len(p) > the buffer size then a single read request will be issued to the underlying io.ReadSeeker for len(p) bytes. A Read request will at most perform a single Read to the underlying io.ReadSeeker, and may return < len(p) if serviced from the buffer.

func (*BufferedReadSeeker) ReadAt

func (b *BufferedReadSeeker) ReadAt(p []byte, off int64) (int, error)

ReadAt will read up to len(p) bytes at the given file offset. This will result in the buffer being cleared.

func (*BufferedReadSeeker) Seek

func (b *BufferedReadSeeker) Seek(offset int64, whence int) (int64, error)

Seek will position then underlying io.ReadSeeker to the given offset and will clear the buffer.

type BufferedReadSeekerWriteTo

type BufferedReadSeekerWriteTo struct {
	*BufferedReadSeeker
}

BufferedReadSeekerWriteTo wraps a BufferedReadSeeker with an io.WriteAt implementation.

func (*BufferedReadSeekerWriteTo) WriteTo

func (b *BufferedReadSeekerWriteTo) WriteTo(writer io.Writer) (int64, error)

WriteTo writes to the given io.Writer from BufferedReadSeeker until there's no more data to write or an error occurs. Returns the number of bytes written and any error encountered during the write.

type BufferedReadSeekerWriteToPool

type BufferedReadSeekerWriteToPool struct {
	// contains filtered or unexported fields
}

BufferedReadSeekerWriteToPool uses a sync.Pool to create and reuse []byte slices for buffering parts in memory

func NewBufferedReadSeekerWriteToPool

func NewBufferedReadSeekerWriteToPool(size int) *BufferedReadSeekerWriteToPool

NewBufferedReadSeekerWriteToPool will return a new BufferedReadSeekerWriteToPool that will create a pool of reusable buffers . If size is less then < 64 KiB then the buffer will default to 64 KiB. Reason: io.Copy from writers or readers that don't support io.WriteTo or io.ReadFrom respectively will default to copying 32 KiB.

func (*BufferedReadSeekerWriteToPool) GetWriteTo

func (p *BufferedReadSeekerWriteToPool) GetWriteTo(seeker io.ReadSeeker) (r ReadSeekerWriteTo, cleanup func())

GetWriteTo will wrap the provided io.ReadSeeker with a BufferedReadSeekerWriteTo. The provided cleanup must be called after operations have been completed on the returned io.ReadSeekerWriteTo in order to signal the return of resources to the pool.

type DeleteListIterator

type DeleteListIterator struct {
	Bucket    *string
	Paginator request.Pagination
	// contains filtered or unexported fields
}

DeleteListIterator is an alternative iterator for the BatchDelete client. This will iterate through a list of objects and delete the objects.

Example:

iter := &s3manager.DeleteListIterator{
	Client: svc,
	Input: &s3.ListObjectsInput{
		Bucket:  aws.String("bucket"),
		MaxKeys: aws.Int64(5),
	},
	Paginator: request.Pagination{
		NewRequest: func() (*request.Request, error) {
			var inCpy *ListObjectsInput
			if input != nil {
				tmp := *input
				inCpy = &tmp
			}
			req, _ := c.ListObjectsRequest(inCpy)
			return req, nil
		},
	},
}

batcher := s3manager.NewBatchDeleteWithClient(svc)
if err := batcher.Delete(aws.BackgroundContext(), iter); err != nil {
	return err
}

func (*DeleteListIterator) DeleteObject

func (iter *DeleteListIterator) DeleteObject() BatchDeleteObject

DeleteObject will return the current object to be deleted.

func (*DeleteListIterator) Err

func (iter *DeleteListIterator) Err() error

Err will return the last known error from Next.

func (*DeleteListIterator) Next

func (iter *DeleteListIterator) Next() bool

Next will use the S3API client to iterate through a list of objects.

type DeleteObjectsIterator

type DeleteObjectsIterator struct {
	Objects []BatchDeleteObject
	// contains filtered or unexported fields
}

DeleteObjectsIterator is an interface that uses the scanner pattern to iterate through a series of objects to be deleted.

func (*DeleteObjectsIterator) DeleteObject

func (iter *DeleteObjectsIterator) DeleteObject() BatchDeleteObject

DeleteObject will return the BatchDeleteObject at the current batched index.

func (*DeleteObjectsIterator) Err

func (iter *DeleteObjectsIterator) Err() error

Err will return an error. Since this is just used to satisfy the BatchDeleteIterator interface this will only return nil.

func (*DeleteObjectsIterator) Next

func (iter *DeleteObjectsIterator) Next() bool

Next will increment the default iterator's index and ensure that there is another object to iterator to.

type DownloadObjectsIterator

type DownloadObjectsIterator struct {
	Objects []BatchDownloadObject
	// contains filtered or unexported fields
}

DownloadObjectsIterator implements the BatchDownloadIterator interface and allows for batched download of objects.

func (*DownloadObjectsIterator) DownloadObject

func (batcher *DownloadObjectsIterator) DownloadObject() BatchDownloadObject

DownloadObject will return the BatchDownloadObject at the current batched index.

func (*DownloadObjectsIterator) Err

func (batcher *DownloadObjectsIterator) Err() error

Err will return an error. Since this is just used to satisfy the BatchDeleteIterator interface this will only return nil.

func (*DownloadObjectsIterator) Next

func (batcher *DownloadObjectsIterator) Next() bool

Next will increment the default iterator's index and ensure that there is another object to iterator to.

type Downloader

type Downloader struct {
	// The size (in bytes) to request from S3 for each part.
	// The minimum allowed part size is 5MB, and  if this value is set to zero,
	// the DefaultDownloadPartSize value will be used.
	//
	// PartSize is ignored if the Range input parameter is provided.
	PartSize int64

	// The number of goroutines to spin up in parallel when sending parts.
	// If this is set to zero, the DefaultDownloadConcurrency value will be used.
	//
	// Concurrency of 1 will download the parts sequentially.
	//
	// Concurrency is ignored if the Range input parameter is provided.
	Concurrency int

	// An S3 client to use when performing downloads.
	S3 s3iface.S3API

	// List of request options that will be passed down to individual API
	// operation requests made by the downloader.
	RequestOptions []request.Option

	// Defines the buffer strategy used when downloading a part.
	//
	// If a WriterReadFromProvider is given the Download manager
	// will pass the io.WriterAt of the Download request to the provider
	// and will use the returned WriterReadFrom from the provider as the
	// destination writer when copying from http response body.
	BufferProvider WriterReadFromProvider
}

The Downloader structure that calls Download(). It is safe to call Download() on this structure for multiple objects and across concurrent goroutines. Mutating the Downloader's properties is not safe to be done concurrently.

func NewDownloader

func NewDownloader(c client.ConfigProvider, options ...func(*Downloader)) *Downloader

NewDownloader creates a new Downloader instance to downloads objects from S3 in concurrent chunks. Pass in additional functional options to customize the downloader behavior. Requires a client.ConfigProvider in order to create a S3 service client. The session.Session satisfies the client.ConfigProvider interface.

Example:

// The session the S3 Downloader will use
sess := session.Must(session.NewSession())

// Create a downloader with the session and default options
downloader := s3manager.NewDownloader(sess)

// Create a downloader with the session and custom options
downloader := s3manager.NewDownloader(sess, func(d *s3manager.Downloader) {
     d.PartSize = 64 * 1024 * 1024 // 64MB per part
})

func NewDownloaderWithClient

func NewDownloaderWithClient(svc s3iface.S3API, options ...func(*Downloader)) *Downloader

NewDownloaderWithClient creates a new Downloader instance to downloads objects from S3 in concurrent chunks. Pass in additional functional options to customize the downloader behavior. Requires a S3 service client to make S3 API calls.

Example:

// The session the S3 Downloader will use
sess := session.Must(session.NewSession())

// The S3 client the S3 Downloader will use
s3Svc := s3.New(sess)

// Create a downloader with the s3 client and default options
downloader := s3manager.NewDownloaderWithClient(s3Svc)

// Create a downloader with the s3 client and custom options
downloader := s3manager.NewDownloaderWithClient(s3Svc, func(d *s3manager.Downloader) {
     d.PartSize = 64 * 1024 * 1024 // 64MB per part
})

func (Downloader) Download

func (d Downloader) Download(w io.WriterAt, input *s3.GetObjectInput, options ...func(*Downloader)) (n int64, err error)

Download downloads an object in S3 and writes the payload into w using concurrent GET requests. The n int64 returned is the size of the object downloaded in bytes.

Additional functional options can be provided to configure the individual download. These options are copies of the Downloader instance Download is called from. Modifying the options will not impact the original Downloader instance.

It is safe to call this method concurrently across goroutines.

The w io.WriterAt can be satisfied by an os.File to do multipart concurrent downloads, or in memory []byte wrapper using aws.WriteAtBuffer.

Specifying a Downloader.Concurrency of 1 will cause the Downloader to download the parts from S3 sequentially.

If the GetObjectInput's Range value is provided that will cause the downloader to perform a single GetObjectInput request for that object's range. This will caused the part size, and concurrency configurations to be ignored.

func (Downloader) DownloadWithContext

func (d Downloader) DownloadWithContext(ctx aws.Context, w io.WriterAt, input *s3.GetObjectInput, options ...func(*Downloader)) (n int64, err error)

DownloadWithContext downloads an object in S3 and writes the payload into w using concurrent GET requests. The n int64 returned is the size of the object downloaded in bytes.

DownloadWithContext is the same as Download with the additional support for Context input parameters. The Context must not be nil. A nil Context will cause a panic. Use the Context to add deadlining, timeouts, etc. The DownloadWithContext may create sub-contexts for individual underlying requests.

Additional functional options can be provided to configure the individual download. These options are copies of the Downloader instance Download is called from. Modifying the options will not impact the original Downloader instance. Use the WithDownloaderRequestOptions helper function to pass in request options that will be applied to all API operations made with this downloader.

The w io.WriterAt can be satisfied by an os.File to do multipart concurrent downloads, or in memory []byte wrapper using aws.WriteAtBuffer.

Specifying a Downloader.Concurrency of 1 will cause the Downloader to download the parts from S3 sequentially.

It is safe to call this method concurrently across goroutines.

If the GetObjectInput's Range value is provided that will cause the downloader to perform a single GetObjectInput request for that object's range. This will caused the part size, and concurrency configurations to be ignored.

func (Downloader) DownloadWithIterator

func (d Downloader) DownloadWithIterator(ctx aws.Context, iter BatchDownloadIterator, opts ...func(*Downloader)) error

DownloadWithIterator will download a batched amount of objects in S3 and writes them to the io.WriterAt specificed in the iterator.

Example:

svc := s3manager.NewDownloader(session)

fooFile, err := os.Open("/tmp/foo.file")
if err != nil {
	return err
}

barFile, err := os.Open("/tmp/bar.file")
if err != nil {
	return err
}

objects := []s3manager.BatchDownloadObject {
	{
		Object: &s3.GetObjectInput {
			Bucket: aws.String("bucket"),
			Key: aws.String("foo"),
		},
		Writer: fooFile,
	},
	{
		Object: &s3.GetObjectInput {
			Bucket: aws.String("bucket"),
			Key: aws.String("bar"),
		},
		Writer: barFile,
	},
}

iter := &s3manager.DownloadObjectsIterator{Objects: objects}
if err := svc.DownloadWithIterator(aws.BackgroundContext(), iter); err != nil {
	return err
}

type Error

type Error struct {
	OrigErr error
	Bucket  *string
	Key     *string
}

Error will contain the original error, bucket, and key of the operation that failed during batch operations.

func (*Error) Error

func (err *Error) Error() string

type Errors

type Errors []Error

Errors is a typed alias for a slice of errors to satisfy the error interface.

func (Errors) Error

func (errs Errors) Error() string

type MultiUploadFailure

type MultiUploadFailure interface {
	awserr.Error

	// Returns the upload id for the S3 multipart upload that failed.
	UploadID() string
}

A MultiUploadFailure wraps a failed S3 multipart upload. An error returned will satisfy this interface when a multi part upload failed to upload all chucks to S3. In the case of a failure the UploadID is needed to operate on the chunks, if any, which were uploaded.

Example:

u := s3manager.NewUploader(opts)
output, err := u.upload(input)
if err != nil {
    if multierr, ok := err.(s3manager.MultiUploadFailure); ok {
        // Process error and its associated uploadID
        fmt.Println("Error:", multierr.Code(), multierr.Message(), multierr.UploadID())
    } else {
        // Process error generically
        fmt.Println("Error:", err.Error())
    }
}

type PooledBufferedReadFromProvider

type PooledBufferedReadFromProvider struct {
	// contains filtered or unexported fields
}

PooledBufferedReadFromProvider is a WriterReadFromProvider that uses a sync.Pool to manage allocation and reuse of *bufio.Writer structures.

func NewPooledBufferedWriterReadFromProvider

func NewPooledBufferedWriterReadFromProvider(size int) *PooledBufferedReadFromProvider

NewPooledBufferedWriterReadFromProvider returns a new PooledBufferedReadFromProvider Size is used to control the size of the underlying *bufio.Writer created for calls to GetReadFrom.

func (*PooledBufferedReadFromProvider) GetReadFrom

func (p *PooledBufferedReadFromProvider) GetReadFrom(writer io.Writer) (r WriterReadFrom, cleanup func())

GetReadFrom takes an io.Writer and wraps it with a type which satisfies the WriterReadFrom interface/ Additionally a cleanup function is provided which must be called after usage of the WriterReadFrom has been completed in order to allow the reuse of the *bufio.Writer

type ReadSeekerWriteTo

type ReadSeekerWriteTo interface {
	io.ReadSeeker
	io.WriterTo
}

ReadSeekerWriteTo defines an interface implementing io.WriteTo and io.ReadSeeker

type ReadSeekerWriteToProvider

type ReadSeekerWriteToProvider interface {
	GetWriteTo(seeker io.ReadSeeker) (r ReadSeekerWriteTo, cleanup func())
}

ReadSeekerWriteToProvider provides an implementation of io.WriteTo for an io.ReadSeeker

type UploadInput

type UploadInput struct {

	// The canned ACL to apply to the object. For more information, see Canned ACL
	// (https://docs.aws.amazon.com/AmazonS3/latest/dev/acl-overview.html#CannedACL).
	//
	// This action is not supported by Amazon S3 on Outposts.
	ACL *string `location:"header" locationName:"x-amz-acl" type:"string" enum:"ObjectCannedACL"`

	// The readable body payload to send to S3.
	Body io.Reader

	// The bucket name to which the PUT action was initiated.
	//
	// When using this action with an access point, you must direct requests to
	// the access point hostname. The access point hostname takes the form AccessPointName-AccountId.s3-accesspoint.Region.amazonaws.com.
	// When using this action with an access point through the Amazon Web Services
	// SDKs, you provide the access point ARN in place of the bucket name. For more
	// information about access point ARNs, see Using access points (https://docs.aws.amazon.com/AmazonS3/latest/userguide/using-access-points.html)
	// in the Amazon S3 User Guide.
	//
	// When you use this action with Amazon S3 on Outposts, you must direct requests
	// to the S3 on Outposts hostname. The S3 on Outposts hostname takes the form
	// AccessPointName-AccountId.outpostID.s3-outposts.Region.amazonaws.com. When
	// you use this action with S3 on Outposts through the Amazon Web Services SDKs,
	// you provide the Outposts access point ARN in place of the bucket name. For
	// more information about S3 on Outposts ARNs, see What is S3 on Outposts? (https://docs.aws.amazon.com/AmazonS3/latest/userguide/S3onOutposts.html)
	// in the Amazon S3 User Guide.
	//
	// Bucket is a required field
	Bucket *string `location:"uri" locationName:"Bucket" type:"string" required:"true"`

	// Specifies whether Amazon S3 should use an S3 Bucket Key for object encryption
	// with server-side encryption using Key Management Service (KMS) keys (SSE-KMS).
	// Setting this header to true causes Amazon S3 to use an S3 Bucket Key for
	// object encryption with SSE-KMS.
	//
	// Specifying this header with a PUT action doesn’t affect bucket-level settings
	// for S3 Bucket Key.
	BucketKeyEnabled *bool `location:"header" locationName:"x-amz-server-side-encryption-bucket-key-enabled" type:"boolean"`

	// Can be used to specify caching behavior along the request/reply chain. For
	// more information, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9
	// (http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9).
	CacheControl *string `location:"header" locationName:"Cache-Control" type:"string"`

	// Indicates the algorithm used to create the checksum for the object when using
	// the SDK. This header will not provide any additional functionality if not
	// using the SDK. When sending this header, there must be a corresponding x-amz-checksum
	// or x-amz-trailer header sent. Otherwise, Amazon S3 fails the request with
	// the HTTP status code 400 Bad Request. For more information, see Checking
	// object integrity (https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html)
	// in the Amazon S3 User Guide.
	//
	// If you provide an individual checksum, Amazon S3 ignores any provided ChecksumAlgorithm
	// parameter.
	//
	// The AWS SDK for Go v1 does not support automatic computing request payload
	// checksum. This feature is available in the AWS SDK for Go v2. If a value
	// is specified for this parameter, the matching algorithm's checksum member
	// must be populated with the algorithm's checksum of the request payload.
	ChecksumAlgorithm *string `location:"header" locationName:"x-amz-sdk-checksum-algorithm" type:"string" enum:"ChecksumAlgorithm"`

	// This header can be used as a data integrity check to verify that the data
	// received is the same data that was originally sent. This header specifies
	// the base64-encoded, 32-bit CRC32 checksum of the object. For more information,
	// see Checking object integrity (https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html)
	// in the Amazon S3 User Guide.
	ChecksumCRC32 *string `location:"header" locationName:"x-amz-checksum-crc32" type:"string"`

	// This header can be used as a data integrity check to verify that the data
	// received is the same data that was originally sent. This header specifies
	// the base64-encoded, 32-bit CRC32C checksum of the object. For more information,
	// see Checking object integrity (https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html)
	// in the Amazon S3 User Guide.
	ChecksumCRC32C *string `location:"header" locationName:"x-amz-checksum-crc32c" type:"string"`

	// This header can be used as a data integrity check to verify that the data
	// received is the same data that was originally sent. This header specifies
	// the base64-encoded, 160-bit SHA-1 digest of the object. For more information,
	// see Checking object integrity (https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html)
	// in the Amazon S3 User Guide.
	ChecksumSHA1 *string `location:"header" locationName:"x-amz-checksum-sha1" type:"string"`

	// This header can be used as a data integrity check to verify that the data
	// received is the same data that was originally sent. This header specifies
	// the base64-encoded, 256-bit SHA-256 digest of the object. For more information,
	// see Checking object integrity (https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html)
	// in the Amazon S3 User Guide.
	ChecksumSHA256 *string `location:"header" locationName:"x-amz-checksum-sha256" type:"string"`

	// Specifies presentational information for the object. For more information,
	// see https://www.rfc-editor.org/rfc/rfc6266#section-4 (https://www.rfc-editor.org/rfc/rfc6266#section-4).
	ContentDisposition *string `location:"header" locationName:"Content-Disposition" type:"string"`

	// Specifies what content encodings have been applied to the object and thus
	// what decoding mechanisms must be applied to obtain the media-type referenced
	// by the Content-Type header field. For more information, see https://www.rfc-editor.org/rfc/rfc9110.html#field.content-encoding
	// (https://www.rfc-editor.org/rfc/rfc9110.html#field.content-encoding).
	ContentEncoding *string `location:"header" locationName:"Content-Encoding" type:"string"`

	// The language the content is in.
	ContentLanguage *string `location:"header" locationName:"Content-Language" type:"string"`

	// The base64-encoded 128-bit MD5 digest of the message (without the headers)
	// according to RFC 1864. This header can be used as a message integrity check
	// to verify that the data is the same data that was originally sent. Although
	// it is optional, we recommend using the Content-MD5 mechanism as an end-to-end
	// integrity check. For more information about REST request authentication,
	// see REST Authentication (https://docs.aws.amazon.com/AmazonS3/latest/dev/RESTAuthentication.html).
	//
	// If the ContentMD5 is provided for a multipart upload, it will be ignored.
	// Objects that will be uploaded in a single part, the ContentMD5 will be used.
	ContentMD5 *string `location:"header" locationName:"Content-MD5" type:"string"`

	// A standard MIME type describing the format of the contents. For more information,
	// see https://www.rfc-editor.org/rfc/rfc9110.html#name-content-type (https://www.rfc-editor.org/rfc/rfc9110.html#name-content-type).
	ContentType *string `location:"header" locationName:"Content-Type" type:"string"`

	// The account ID of the expected bucket owner. If the bucket is owned by a
	// different account, the request fails with the HTTP status code 403 Forbidden
	// (access denied).
	ExpectedBucketOwner *string `location:"header" locationName:"x-amz-expected-bucket-owner" type:"string"`

	// The date and time at which the object is no longer cacheable. For more information,
	// see https://www.rfc-editor.org/rfc/rfc7234#section-5.3 (https://www.rfc-editor.org/rfc/rfc7234#section-5.3).
	Expires *time.Time `location:"header" locationName:"Expires" type:"timestamp"`

	// Gives the grantee READ, READ_ACP, and WRITE_ACP permissions on the object.
	//
	// This action is not supported by Amazon S3 on Outposts.
	GrantFullControl *string `location:"header" locationName:"x-amz-grant-full-control" type:"string"`

	// Allows grantee to read the object data and its metadata.
	//
	// This action is not supported by Amazon S3 on Outposts.
	GrantRead *string `location:"header" locationName:"x-amz-grant-read" type:"string"`

	// Allows grantee to read the object ACL.
	//
	// This action is not supported by Amazon S3 on Outposts.
	GrantReadACP *string `location:"header" locationName:"x-amz-grant-read-acp" type:"string"`

	// Allows grantee to write the ACL for the applicable object.
	//
	// This action is not supported by Amazon S3 on Outposts.
	GrantWriteACP *string `location:"header" locationName:"x-amz-grant-write-acp" type:"string"`

	// Object key for which the PUT action was initiated.
	//
	// Key is a required field
	Key *string `location:"uri" locationName:"Key" min:"1" type:"string" required:"true"`

	// A map of metadata to store with the object in S3.
	Metadata map[string]*string `location:"headers" locationName:"x-amz-meta-" type:"map"`

	// Specifies whether a legal hold will be applied to this object. For more information
	// about S3 Object Lock, see Object Lock (https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lock.html).
	ObjectLockLegalHoldStatus *string `location:"header" locationName:"x-amz-object-lock-legal-hold" type:"string" enum:"ObjectLockLegalHoldStatus"`

	// The Object Lock mode that you want to apply to this object.
	ObjectLockMode *string `location:"header" locationName:"x-amz-object-lock-mode" type:"string" enum:"ObjectLockMode"`

	// The date and time when you want this object's Object Lock to expire. Must
	// be formatted as a timestamp parameter.
	ObjectLockRetainUntilDate *time.Time `location:"header" locationName:"x-amz-object-lock-retain-until-date" type:"timestamp" timestampFormat:"iso8601"`

	// Confirms that the requester knows that they will be charged for the request.
	// Bucket owners need not specify this parameter in their requests. For information
	// about downloading objects from Requester Pays buckets, see Downloading Objects
	// in Requester Pays Buckets (https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectsinRequesterPaysBuckets.html)
	// in the Amazon S3 User Guide.
	RequestPayer *string `location:"header" locationName:"x-amz-request-payer" type:"string" enum:"RequestPayer"`

	// Specifies the algorithm to use to when encrypting the object (for example,
	// AES256).
	SSECustomerAlgorithm *string `location:"header" locationName:"x-amz-server-side-encryption-customer-algorithm" type:"string"`

	// Specifies the customer-provided encryption key for Amazon S3 to use in encrypting
	// data. This value is used to store the object and then it is discarded; Amazon
	// S3 does not store the encryption key. The key must be appropriate for use
	// with the algorithm specified in the x-amz-server-side-encryption-customer-algorithm
	// header.
	SSECustomerKey *string `marshal-as:"blob" location:"header" locationName:"x-amz-server-side-encryption-customer-key" type:"string" sensitive:"true"`

	// Specifies the 128-bit MD5 digest of the encryption key according to RFC 1321.
	// Amazon S3 uses this header for a message integrity check to ensure that the
	// encryption key was transmitted without error.
	SSECustomerKeyMD5 *string `location:"header" locationName:"x-amz-server-side-encryption-customer-key-MD5" type:"string"`

	// Specifies the Amazon Web Services KMS Encryption Context to use for object
	// encryption. The value of this header is a base64-encoded UTF-8 string holding
	// JSON with the encryption context key-value pairs. This value is stored as
	// object metadata and automatically gets passed on to Amazon Web Services KMS
	// for future GetObject or CopyObject operations on this object.
	SSEKMSEncryptionContext *string `location:"header" locationName:"x-amz-server-side-encryption-context" type:"string" sensitive:"true"`

	// If x-amz-server-side-encryption has a valid value of aws:kms or aws:kms:dsse,
	// this header specifies the ID of the Key Management Service (KMS) symmetric
	// encryption customer managed key that was used for the object. If you specify
	// x-amz-server-side-encryption:aws:kms or x-amz-server-side-encryption:aws:kms:dsse,
	// but do not providex-amz-server-side-encryption-aws-kms-key-id, Amazon S3
	// uses the Amazon Web Services managed key (aws/s3) to protect the data. If
	// the KMS key does not exist in the same account that's issuing the command,
	// you must use the full ARN and not just the ID.
	SSEKMSKeyId *string `location:"header" locationName:"x-amz-server-side-encryption-aws-kms-key-id" type:"string" sensitive:"true"`

	// The server-side encryption algorithm used when storing this object in Amazon
	// S3 (for example, AES256, aws:kms, aws:kms:dsse).
	ServerSideEncryption *string `location:"header" locationName:"x-amz-server-side-encryption" type:"string" enum:"ServerSideEncryption"`

	// By default, Amazon S3 uses the STANDARD Storage Class to store newly created
	// objects. The STANDARD storage class provides high durability and high availability.
	// Depending on performance needs, you can specify a different Storage Class.
	// Amazon S3 on Outposts only uses the OUTPOSTS Storage Class. For more information,
	// see Storage Classes (https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html)
	// in the Amazon S3 User Guide.
	StorageClass *string `location:"header" locationName:"x-amz-storage-class" type:"string" enum:"StorageClass"`

	// The tag-set for the object. The tag-set must be encoded as URL Query parameters.
	// (For example, "Key1=Value1")
	Tagging *string `location:"header" locationName:"x-amz-tagging" type:"string"`

	// If the bucket is configured as a website, redirects requests for this object
	// to another object in the same bucket or to an external URL. Amazon S3 stores
	// the value of this header in the object metadata. For information about object
	// metadata, see Object Key and Metadata (https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingMetadata.html).
	//
	// In the following example, the request header sets the redirect to an object
	// (anotherPage.html) in the same bucket:
	//
	// x-amz-website-redirect-location: /anotherPage.html
	//
	// In the following example, the request header sets the object redirect to
	// another website:
	//
	// x-amz-website-redirect-location: http://www.example.com/
	//
	// For more information about website hosting in Amazon S3, see Hosting Websites
	// on Amazon S3 (https://docs.aws.amazon.com/AmazonS3/latest/dev/WebsiteHosting.html)
	// and How to Configure Website Page Redirects (https://docs.aws.amazon.com/AmazonS3/latest/dev/how-to-page-redirect.html).
	WebsiteRedirectLocation *string `location:"header" locationName:"x-amz-website-redirect-location" type:"string"`
	// contains filtered or unexported fields
}

UploadInput provides the input parameters for uploading a stream or buffer to an object in an Amazon S3 bucket. This type is similar to the s3 package's PutObjectInput with the exception that the Body member is an io.Reader instead of an io.ReadSeeker.

The ContentMD5 member for pre-computed MD5 checksums will be ignored for multipart uploads. Objects that will be uploaded in a single part, the ContentMD5 will be used.

The Checksum members for pre-computed checksums will be ignored for multipart uploads. Objects that will be uploaded in a single part, will include the checksum member in the request.

type UploadObjectsIterator

type UploadObjectsIterator struct {
	Objects []BatchUploadObject
	// contains filtered or unexported fields
}

UploadObjectsIterator implements the BatchUploadIterator interface and allows for batched upload of objects.

func (*UploadObjectsIterator) Err

func (batcher *UploadObjectsIterator) Err() error

Err will return an error. Since this is just used to satisfy the BatchUploadIterator interface this will only return nil.

func (*UploadObjectsIterator) Next

func (batcher *UploadObjectsIterator) Next() bool

Next will increment the default iterator's index and ensure that there is another object to iterator to.

func (*UploadObjectsIterator) UploadObject

func (batcher *UploadObjectsIterator) UploadObject() BatchUploadObject

UploadObject will return the BatchUploadObject at the current batched index.

type UploadOutput

type UploadOutput struct {
	// The URL where the object was uploaded to.
	Location string

	// The version of the object that was uploaded. Will only be populated if
	// the S3 Bucket is versioned. If the bucket is not versioned this field
	// will not be set.
	VersionID *string

	// The ID for a multipart upload to S3. In the case of an error the error
	// can be cast to the MultiUploadFailure interface to extract the upload ID.
	UploadID string

	// Entity tag of the object.
	ETag *string
}

UploadOutput represents a response from the Upload() call.

type Uploader

type Uploader struct {
	// The buffer size (in bytes) to use when buffering data into chunks and
	// sending them as parts to S3. The minimum allowed part size is 5MB, and
	// if this value is set to zero, the DefaultUploadPartSize value will be used.
	PartSize int64

	// The number of goroutines to spin up in parallel per call to Upload when
	// sending parts. If this is set to zero, the DefaultUploadConcurrency value
	// will be used.
	//
	// The concurrency pool is not shared between calls to Upload.
	Concurrency int

	// Setting this value to true will cause the SDK to avoid calling
	// AbortMultipartUpload on a failure, leaving all successfully uploaded
	// parts on S3 for manual recovery.
	//
	// Note that storing parts of an incomplete multipart upload counts towards
	// space usage on S3 and will add additional costs if not cleaned up.
	LeavePartsOnError bool

	// MaxUploadParts is the max number of parts which will be uploaded to S3.
	// Will be used to calculate the partsize of the object to be uploaded.
	// E.g: 5GB file, with MaxUploadParts set to 100, will upload the file
	// as 100, 50MB parts. With a limited of s3.MaxUploadParts (10,000 parts).
	//
	// MaxUploadParts must not be used to limit the total number of bytes uploaded.
	// Use a type like to io.LimitReader (https://golang.org/pkg/io/#LimitedReader)
	// instead. An io.LimitReader is helpful when uploading an unbounded reader
	// to S3, and you know its maximum size. Otherwise the reader's io.EOF returned
	// error must be used to signal end of stream.
	//
	// Defaults to package const's MaxUploadParts value.
	MaxUploadParts int

	// The client to use when uploading to S3.
	S3 s3iface.S3API

	// List of request options that will be passed down to individual API
	// operation requests made by the uploader.
	RequestOptions []request.Option

	// Defines the buffer strategy used when uploading a part
	BufferProvider ReadSeekerWriteToProvider
	// contains filtered or unexported fields
}

The Uploader structure that calls Upload(). It is safe to call Upload() on this structure for multiple objects and across concurrent goroutines. Mutating the Uploader's properties is not safe to be done concurrently.

The ContentMD5 member for pre-computed MD5 checksums will be ignored for multipart uploads. Objects that will be uploaded in a single part, the ContentMD5 will be used.

The Checksum members for pre-computed checksums will be ignored for multipart uploads. Objects that will be uploaded in a single part, will include the checksum member in the request.

func NewUploader

func NewUploader(c client.ConfigProvider, options ...func(*Uploader)) *Uploader

NewUploader creates a new Uploader instance to upload objects to S3. Pass In additional functional options to customize the uploader's behavior. Requires a client.ConfigProvider in order to create a S3 service client. The session.Session satisfies the client.ConfigProvider interface.

Example:

// The session the S3 Uploader will use
sess := session.Must(session.NewSession())

// Create an uploader with the session and default options
uploader := s3manager.NewUploader(sess)

// Create an uploader with the session and custom options
uploader := s3manager.NewUploader(session, func(u *s3manager.Uploader) {
     u.PartSize = 64 * 1024 * 1024 // 64MB per part
})
Example (OverrideReadSeekerProvider)

ExampleNewUploader_overrideReadSeekerProvider gives an example on a custom ReadSeekerWriteToProvider can be provided to Uploader to define how parts will be buffered in memory.

package main

import (
	"bytes"
	"fmt"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3/s3manager"
)

func main() {
	sess := session.Must(session.NewSession())

	uploader := s3manager.NewUploader(sess, func(u *s3manager.Uploader) {
		// Define a strategy that will buffer 25 MiB in memory
		u.BufferProvider = s3manager.NewBufferedReadSeekerWriteToPool(25 * 1024 * 1024)
	})

	_, err := uploader.Upload(&s3manager.UploadInput{
		Bucket: aws.String("examplebucket"),
		Key:    aws.String("largeobject"),
		Body:   bytes.NewReader([]byte("large_multi_part_upload")),
	})
	if err != nil {
		fmt.Println(err.Error())
	}
}
Output:

Example (OverrideTransport)

ExampleNewUploader_overrideTransport gives an example on how to override the default HTTP transport. This can be used to tune timeouts such as response headers, or write / read buffer usage when writing or reading respectively from the net/http transport.

package main

import (
	"bytes"
	"fmt"
	"net/http"
	"time"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/s3/s3manager"
)

func main() {
	// Create Transport
	tr := &http.Transport{
		ResponseHeaderTimeout: 1 * time.Second,
		// WriteBufferSize: 1024*1024 // Go 1.13
		// ReadBufferSize: 1024*1024 // Go 1.13
	}

	sess := session.Must(session.NewSession(&aws.Config{
		HTTPClient: &http.Client{Transport: tr},
	}))

	uploader := s3manager.NewUploader(sess)

	_, err := uploader.Upload(&s3manager.UploadInput{
		Bucket: aws.String("examplebucket"),
		Key:    aws.String("largeobject"),
		Body:   bytes.NewReader([]byte("large_multi_part_upload")),
	})
	if err != nil {
		fmt.Println(err.Error())
	}
}
Output:

func NewUploaderWithClient

func NewUploaderWithClient(svc s3iface.S3API, options ...func(*Uploader)) *Uploader

NewUploaderWithClient creates a new Uploader instance to upload objects to S3. Pass in additional functional options to customize the uploader's behavior. Requires a S3 service client to make S3 API calls.

Example:

// The session the S3 Uploader will use
sess := session.Must(session.NewSession())

// S3 service client the Upload manager will use.
s3Svc := s3.New(sess)

// Create an uploader with S3 client and default options
uploader := s3manager.NewUploaderWithClient(s3Svc)

// Create an uploader with S3 client and custom options
uploader := s3manager.NewUploaderWithClient(s3Svc, func(u *s3manager.Uploader) {
     u.PartSize = 64 * 1024 * 1024 // 64MB per part
})

func (Uploader) Upload

func (u Uploader) Upload(input *UploadInput, options ...func(*Uploader)) (*UploadOutput, error)

Upload uploads an object to S3, intelligently buffering large files into smaller chunks and sending them in parallel across multiple goroutines. You can configure the buffer size and concurrency through the Uploader's parameters.

Additional functional options can be provided to configure the individual upload. These options are copies of the Uploader instance Upload is called from. Modifying the options will not impact the original Uploader instance.

Use the WithUploaderRequestOptions helper function to pass in request options that will be applied to all API operations made with this uploader.

It is safe to call this method concurrently across goroutines.

Example:

// Upload input parameters
upParams := &s3manager.UploadInput{
    Bucket: &bucketName,
    Key:    &keyName,
    Body:   file,
}

// Perform an upload.
result, err := uploader.Upload(upParams)

// Perform upload with options different than the those in the Uploader.
result, err := uploader.Upload(upParams, func(u *s3manager.Uploader) {
     u.PartSize = 10 * 1024 * 1024 // 10MB part size
     u.LeavePartsOnError = true    // Don't delete the parts if the upload fails.
})

func (Uploader) UploadWithContext

func (u Uploader) UploadWithContext(ctx aws.Context, input *UploadInput, opts ...func(*Uploader)) (*UploadOutput, error)

UploadWithContext uploads an object to S3, intelligently buffering large files into smaller chunks and sending them in parallel across multiple goroutines. You can configure the buffer size and concurrency through the Uploader's parameters.

UploadWithContext is the same as Upload with the additional support for Context input parameters. The Context must not be nil. A nil Context will cause a panic. Use the context to add deadlining, timeouts, etc. The UploadWithContext may create sub-contexts for individual underlying requests.

Additional functional options can be provided to configure the individual upload. These options are copies of the Uploader instance Upload is called from. Modifying the options will not impact the original Uploader instance.

Use the WithUploaderRequestOptions helper function to pass in request options that will be applied to all API operations made with this uploader.

It is safe to call this method concurrently across goroutines.

func (Uploader) UploadWithIterator

func (u Uploader) UploadWithIterator(ctx aws.Context, iter BatchUploadIterator, opts ...func(*Uploader)) error

UploadWithIterator will upload a batched amount of objects to S3. This operation uses the iterator pattern to know which object to upload next. Since this is an interface this allows for custom defined functionality.

Example:

svc:= s3manager.NewUploader(sess)

objects := []BatchUploadObject{
	{
		Object:	&s3manager.UploadInput {
			Key: aws.String("key"),
			Bucket: aws.String("bucket"),
		},
	},
}

iter := &s3manager.UploadObjectsIterator{Objects: objects}
if err := svc.UploadWithIterator(aws.BackgroundContext(), iter); err != nil {
	return err
}

type WriterReadFrom

type WriterReadFrom interface {
	io.Writer
	io.ReaderFrom
}

WriterReadFrom defines an interface implementing io.Writer and io.ReaderFrom

type WriterReadFromProvider

type WriterReadFromProvider interface {
	GetReadFrom(writer io.Writer) (w WriterReadFrom, cleanup func())
}

WriterReadFromProvider provides an implementation of io.ReadFrom for the given io.Writer

Directories

Path Synopsis
Package s3manageriface provides an interface for the s3manager package
Package s3manageriface provides an interface for the s3manager package

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