ListMultipartUploads
This operation lists in-progress multipart uploads in a bucket. An in-progress multipart
upload is a multipart upload that has been initiated by the
CreateMultipartUpload
request, but has not yet been completed or
aborted.
Note
Directory buckets - If multipart uploads in
a directory bucket are in progress, you can't delete the bucket until all the
in-progress multipart uploads are aborted or completed. To delete these in-progress
multipart uploads, use the ListMultipartUploads
operation to list the
in-progress multipart uploads in the bucket and use the
AbortMultipartUpload
operation to abort all the in-progress multipart
uploads.
The ListMultipartUploads
operation returns a maximum of 1,000 multipart
uploads in the response. The limit of 1,000 multipart uploads is also the default value.
You can further limit the number of uploads in a response by specifying the
max-uploads
request parameter. If there are more than 1,000 multipart
uploads that satisfy your ListMultipartUploads
request, the response returns
an IsTruncated
element with the value of true
, a
NextKeyMarker
element, and a NextUploadIdMarker
element. To
list the remaining multipart uploads, you need to make subsequent
ListMultipartUploads
requests. In these requests, include two query
parameters: key-marker
and upload-id-marker
. Set the value of
key-marker
to the NextKeyMarker
value from the previous
response. Similarly, set the value of upload-id-marker
to the
NextUploadIdMarker
value from the previous response.
Note
Directory buckets - The
upload-id-marker
element and the NextUploadIdMarker
element
aren't supported by directory buckets. To list the additional multipart uploads, you
only need to set the value of key-marker
to the NextKeyMarker
value from the previous response.
For more information about multipart uploads, see Uploading Objects Using Multipart Upload in the Amazon S3 User Guide.
Note
Directory buckets -
For directory buckets, you must make requests for this API operation to the Zonal endpoint. These endpoints support virtual-hosted-style requests in the format https://bucket-name.s3express-zone-id.region-code.amazonaws.com/key-name
. Path-style requests are not supported. For more information about endpoints in Availability Zones, see Regional and Zonal endpoints for directory buckets in Availability Zones in the
Amazon S3 User Guide. For more information about endpoints in Local Zones, see Concepts for directory buckets in Local Zones in the
Amazon S3 User Guide.
- Permissions
-
-
General purpose bucket permissions - For information about permissions required to use the multipart upload API, see Multipart Upload and Permissions in the Amazon S3 User Guide.
-
Directory bucket permissions - To grant access to this API operation on a directory bucket, we recommend that you use the
CreateSession
API operation for session-based authorization. Specifically, you grant thes3express:CreateSession
permission to the directory bucket in a bucket policy or an IAM identity-based policy. Then, you make theCreateSession
API call on the bucket to obtain a session token. With the session token in your request header, you can make API requests to this operation. After the session token expires, you make anotherCreateSession
API call to generate a new session token for use. Amazon CLI or SDKs create session and refresh the session token automatically to avoid service interruptions when a session expires. For more information about authorization, seeCreateSession
.
-
- Sorting of multipart uploads in response
-
-
General purpose bucket - In the
ListMultipartUploads
response, the multipart uploads are sorted based on two criteria:-
Key-based sorting - Multipart uploads are initially sorted in ascending order based on their object keys.
-
Time-based sorting - For uploads that share the same object key, they are further sorted in ascending order based on the upload initiation time. Among uploads with the same key, the one that was initiated first will appear before the ones that were initiated later.
-
-
Directory bucket - In the
ListMultipartUploads
response, the multipart uploads aren't sorted lexicographically based on the object keys.
-
- HTTP Host header syntax
-
Directory buckets - The HTTP Host header syntax is
Bucket-name.s3express-zone-id.region-code.amazonaws.com
.
The following operations are related to ListMultipartUploads
:
Request Syntax
GET /?uploads&delimiter=Delimiter
&encoding-type=EncodingType
&key-marker=KeyMarker
&max-uploads=MaxUploads
&prefix=Prefix
&upload-id-marker=UploadIdMarker
HTTP/1.1
Host: Bucket
.s3.amazonaws.com
x-amz-expected-bucket-owner: ExpectedBucketOwner
x-amz-request-payer: RequestPayer
URI Request Parameters
The request uses the following URI parameters.
- Bucket
-
The name of the bucket to which the multipart upload was initiated.
Directory buckets - When you use this operation with a directory bucket, you must use virtual-hosted-style requests in the format
Bucket-name.s3express-zone-id.region-code.amazonaws.com
. Path-style requests are not supported. Directory bucket names must be unique in the chosen Zone (Availability Zone or Local Zone). Bucket names must follow the formatbucket-base-name--zone-id--x-s3
(for example,DOC-EXAMPLE-BUCKET--usw2-az1--x-s3
). For information about bucket naming restrictions, see Directory bucket naming rules in the Amazon S3 User Guide.Access points - When you use this action with an access point, you must provide the alias of the access point in place of the bucket name or specify the access point ARN. When using the access point ARN, 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 SDKs, you provide the access point ARN in place of the bucket name. For more information about access point ARNs, see Using access points in the Amazon S3 User Guide.
Note
Access points and Object Lambda access points are not supported by directory buckets.
S3 on Outposts - 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 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? in the Amazon S3 User Guide.Required: Yes
- delimiter
-
Character you use to group keys.
All keys that contain the same string between the prefix, if specified, and the first occurrence of the delimiter after the prefix are grouped under a single result element,
CommonPrefixes
. If you don't specify the prefix parameter, then the substring starts at the beginning of the key. The keys that are grouped underCommonPrefixes
result element are not returned elsewhere in the response.Note
Directory buckets - For directory buckets,
/
is the only supported delimiter. - encoding-type
-
Encoding type used by Amazon S3 to encode the object keys in the response. Responses are encoded only in UTF-8. An object key can contain any Unicode character. However, the XML 1.0 parser can't parse certain characters, such as characters with an ASCII value from 0 to 10. For characters that aren't supported in XML 1.0, you can add this parameter to request that Amazon S3 encode the keys in the response. For more information about characters to avoid in object key names, see Object key naming guidelines.
Note
When using the URL encoding type, non-ASCII characters that are used in an object's key name will be percent-encoded according to UTF-8 code values. For example, the object
test_file(3).png
will appear astest_file%283%29.png
.Valid Values:
url
- key-marker
-
Specifies the multipart upload after which listing should begin.
Note
-
General purpose buckets - For general purpose buckets,
key-marker
is an object key. Together withupload-id-marker
, this parameter specifies the multipart upload after which listing should begin.If
upload-id-marker
is not specified, only the keys lexicographically greater than the specifiedkey-marker
will be included in the list.If
upload-id-marker
is specified, any multipart uploads for a key equal to thekey-marker
might also be included, provided those multipart uploads have upload IDs lexicographically greater than the specifiedupload-id-marker
. -
Directory buckets - For directory buckets,
key-marker
is obfuscated and isn't a real object key. Theupload-id-marker
parameter isn't supported by directory buckets. To list the additional multipart uploads, you only need to set the value ofkey-marker
to theNextKeyMarker
value from the previous response.In the
ListMultipartUploads
response, the multipart uploads aren't sorted lexicographically based on the object keys.
-
- max-uploads
-
Sets the maximum number of multipart uploads, from 1 to 1,000, to return in the response body. 1,000 is the maximum number of uploads that can be returned in a response.
- prefix
-
Lists in-progress uploads only for those keys that begin with the specified prefix. You can use prefixes to separate a bucket into different grouping of keys. (You can think of using
prefix
to make groups in the same way that you'd use a folder in a file system.)Note
Directory buckets - For directory buckets, only prefixes that end in a delimiter (
/
) are supported. - upload-id-marker
-
Together with key-marker, specifies the multipart upload after which listing should begin. If key-marker is not specified, the upload-id-marker parameter is ignored. Otherwise, any multipart uploads for a key equal to the key-marker might be included in the list only if they have an upload ID lexicographically greater than the specified
upload-id-marker
.Note
This functionality is not supported for directory buckets.
- x-amz-expected-bucket-owner
-
The account ID of the expected bucket owner. If the account ID that you provide does not match the actual owner of the bucket, the request fails with the HTTP status code
403 Forbidden
(access denied). - x-amz-request-payer
-
Confirms that the requester knows that they will be charged for the request. Bucket owners need not specify this parameter in their requests. If either the source or destination S3 bucket has Requester Pays enabled, the requester will pay for corresponding charges to copy the object. For information about downloading objects from Requester Pays buckets, see Downloading Objects in Requester Pays Buckets in the Amazon S3 User Guide.
Note
This functionality is not supported for directory buckets.
Valid Values:
requester
Request Body
The request does not have a request body.
Response Syntax
HTTP/1.1 200
x-amz-request-charged: RequestCharged
<?xml version="1.0" encoding="UTF-8"?>
<ListMultipartUploadsResult>
<Bucket>string</Bucket>
<KeyMarker>string</KeyMarker>
<UploadIdMarker>string</UploadIdMarker>
<NextKeyMarker>string</NextKeyMarker>
<Prefix>string</Prefix>
<Delimiter>string</Delimiter>
<NextUploadIdMarker>string</NextUploadIdMarker>
<MaxUploads>integer</MaxUploads>
<IsTruncated>boolean</IsTruncated>
<Upload>
<ChecksumAlgorithm>string</ChecksumAlgorithm>
<Initiated>timestamp</Initiated>
<Initiator>
<DisplayName>string</DisplayName>
<ID>string</ID>
</Initiator>
<Key>string</Key>
<Owner>
<DisplayName>string</DisplayName>
<ID>string</ID>
</Owner>
<StorageClass>string</StorageClass>
<UploadId>string</UploadId>
</Upload>
...
<CommonPrefixes>
<Prefix>string</Prefix>
</CommonPrefixes>
...
<EncodingType>string</EncodingType>
</ListMultipartUploadsResult>
Response Elements
If the action is successful, the service sends back an HTTP 200 response.
The response returns the following HTTP headers.
- x-amz-request-charged
-
If present, indicates that the requester was successfully charged for the request.
Note
This functionality is not supported for directory buckets.
Valid Values:
requester
The following data is returned in XML format by the service.
- ListMultipartUploadsResult
-
Root level tag for the ListMultipartUploadsResult parameters.
Required: Yes
- Bucket
-
The name of the bucket to which the multipart upload was initiated. Does not return the access point ARN or access point alias if used.
Type: String
- CommonPrefixes
-
If you specify a delimiter in the request, then the result returns each distinct key prefix containing the delimiter in a
CommonPrefixes
element. The distinct key prefixes are returned in thePrefix
child element.Note
Directory buckets - For directory buckets, only prefixes that end in a delimiter (
/
) are supported.Type: Array of CommonPrefix data types
- Delimiter
-
Contains the delimiter you specified in the request. If you don't specify a delimiter in your request, this element is absent from the response.
Note
Directory buckets - For directory buckets,
/
is the only supported delimiter.Type: String
- EncodingType
-
Encoding type used by Amazon S3 to encode object keys in the response.
If you specify the
encoding-type
request parameter, Amazon S3 includes this element in the response, and returns encoded key name values in the following response elements:Delimiter
,KeyMarker
,Prefix
,NextKeyMarker
,Key
.Type: String
Valid Values:
url
- IsTruncated
-
Indicates whether the returned list of multipart uploads is truncated. A value of true indicates that the list was truncated. The list can be truncated if the number of multipart uploads exceeds the limit allowed or specified by max uploads.
Type: Boolean
- KeyMarker
-
The key at or after which the listing began.
Type: String
- MaxUploads
-
Maximum number of multipart uploads that could have been included in the response.
Type: Integer
- NextKeyMarker
-
When a list is truncated, this element specifies the value that should be used for the key-marker request parameter in a subsequent request.
Type: String
- NextUploadIdMarker
-
When a list is truncated, this element specifies the value that should be used for the
upload-id-marker
request parameter in a subsequent request.Note
This functionality is not supported for directory buckets.
Type: String
- Prefix
-
When a prefix is provided in the request, this field contains the specified prefix. The result contains only keys starting with the specified prefix.
Note
Directory buckets - For directory buckets, only prefixes that end in a delimiter (
/
) are supported.Type: String
- Upload
-
Container for elements related to a particular multipart upload. A response can contain zero or more
Upload
elements.Type: Array of MultipartUpload data types
- UploadIdMarker
-
Together with key-marker, specifies the multipart upload after which listing should begin. If key-marker is not specified, the upload-id-marker parameter is ignored. Otherwise, any multipart uploads for a key equal to the key-marker might be included in the list only if they have an upload ID lexicographically greater than the specified
upload-id-marker
.Note
This functionality is not supported for directory buckets.
Type: String
Examples
Sample Request for general purpose buckets
The following request lists three multipart uploads. The request specifies the
max-uploads
request parameter to set the maximum number of multipart
uploads to return in the response body.
GET /?uploads&max-uploads=3 HTTP/1.1 Host: example-bucket.s3.<Region>.amazonaws.com Date: Mon, 1 Nov 2010 20:34:56 GMT Authorization: authorization string
Sample Response for general purpose buckets
The following sample response indicates that the multipart upload list was
truncated and provides the NextKeyMarker
and the
NextUploadIdMarker
elements. You specify these values in your
subsequent requests to read the next set of multipart uploads. That is, send a
subsequent request specifying key-marker=my-movie2.m2ts
(value of the
NextKeyMarker
element) and
upload-id-marker=YW55IGlkZWEgd2h5IGVsdmluZydzIHVwbG9hZCBmYWlsZWQ
(value of the NextUploadIdMarker
).
The sample response also shows a case of two multipart uploads in progress with
the same key (my-movie.m2ts
). That is, the response shows two uploads
with the same key. This response shows the uploads sorted by key, and within each key
the uploads are sorted in ascending order by the time the multipart upload was
initiated.
HTTP/1.1 200 OK x-amz-id-2: Uuag1LuByRx9e6j5Onimru9pO4ZVKnJ2Qz7/C1NPcfTWAtRPfTaOFg== x-amz-request-id: 656c76696e6727732072657175657374 Date: Mon, 1 Nov 2010 20:34:56 GMT Content-Length: 1330 Connection: keep-alive Server: AmazonS3 <?xml version="1.0" encoding="UTF-8"?> <ListMultipartUploadsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Bucket>bucket</Bucket> <KeyMarker></KeyMarker> <UploadIdMarker></UploadIdMarker> <NextKeyMarker>my-movie.m2ts</NextKeyMarker> <NextUploadIdMarker>YW55IGlkZWEgd2h5IGVsdmluZydzIHVwbG9hZCBmYWlsZWQ</NextUploadIdMarker> <MaxUploads>3</MaxUploads> <IsTruncated>true</IsTruncated> <Upload> <Key>my-divisor</Key> <UploadId>XMgbGlrZSBlbHZpbmcncyBub3QgaGF2aW5nIG11Y2ggbHVjaw</UploadId> <Initiator> <ID>arn:aws:iam::111122223333:user/user1-11111a31-17b5-4fb7-9df5-b111111f13de</ID> <DisplayName>user1-11111a31-17b5-4fb7-9df5-b111111f13de</DisplayName> </Initiator> <Owner> <ID>75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a</ID> <DisplayName>OwnerDisplayName</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> <Initiated>2010-11-10T20:48:33.000Z</Initiated> </Upload> <Upload> <Key>my-movie.m2ts</Key> <UploadId>VXBsb2FkIElEIGZvciBlbHZpbmcncyBteS1tb3ZpZS5tMnRzIHVwbG9hZA</UploadId> <Initiator> <ID>b1d16700c70b0b05597d7acd6a3f92be</ID> <DisplayName>InitiatorDisplayName</DisplayName> </Initiator> <Owner> <ID>b1d16700c70b0b05597d7acd6a3f92be</ID> <DisplayName>OwnerDisplayName</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> <Initiated>2010-11-10T20:48:33.000Z</Initiated> </Upload> <Upload> <Key>my-movie.m2ts</Key> <UploadId>YW55IGlkZWEgd2h5IGVsdmluZydzIHVwbG9hZCBmYWlsZWQ</UploadId> <Initiator> <ID>arn:aws:iam::444455556666:user/user1-22222a31-17b5-4fb7-9df5-b222222f13de</ID> <DisplayName>user1-22222a31-17b5-4fb7-9df5-b222222f13de</DisplayName> </Initiator> <Owner> <ID>b1d16700c70b0b05597d7acd6a3f92be</ID> <DisplayName>OwnerDisplayName</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> <Initiated>2010-11-10T20:49:33.000Z</Initiated> </Upload> </ListMultipartUploadsResult>
Sample Request for general purpose buckets: Using the delimiter and the prefix parameters
Assume you have a multipart upload in progress for the following keys in your
bucket, example-bucket
.
-
photos/2006/January/sample.jpg
-
photos/2006/February/sample.jpg
-
photos/2006/March/sample.jpg
-
videos/2006/March/sample.wmv
-
sample.jpg
The following list multipart upload request specifies the delimiter parameter with value "/".
GET /?uploads&delimiter=/ HTTP/1.1 Host: example-bucket.s3.<Region>.amazonaws.com Date: Mon, 1 Nov 2010 20:34:56 GMT Authorization: authorization string
Sample Response for general purpose buckets
The following sample response lists multipart uploads on the specified bucket,
example-bucket
.
The response returns multipart upload for the sample.jpg
key in an
<Upload>
element.
However, because all the other keys contain the specified delimiter, a distinct
substring, from the beginning of the key to the first occurrence of the delimiter,
from each of these keys is returned in a <CommonPrefixes> element. The key
substrings, photos/
and videos/
in the
<CommonPrefixes> element, indicate that there are one or more in-progress
multipart uploads with these key prefixes.
This is a useful scenario if you use key prefixes for your objects to create a
logical folder like structure. In this case, you can interpret the result as the
folders photos/
and videos/
have one or more multipart
uploads in progress.
<ListMultipartUploadsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Bucket>example-bucket</Bucket> <KeyMarker/> <UploadIdMarker/> <NextKeyMarker>sample.jpg</NextKeyMarker> <NextUploadIdMarker>Xgw4MJT6ZPAVxpY0SAuGN7q4uWJJM22ZYg1W99trdp4tpO88.PT6.MhO0w2E17eutfAvQfQWoajgE_W2gpcxQw--</NextUploadIdMarker> <Delimiter>/</Delimiter> <Prefix/> <MaxUploads>1000</MaxUploads> <IsTruncated>false</IsTruncated> <Upload> <Key>sample.jpg</Key> <UploadId>Agw4MJT6ZPAVxpY0SAuGN7q4uWJJM22ZYg1N99trdp4tpO88.PT6.MhO0w2E17eutfAvQfQWoajgE_W2gpcxQw--</UploadId> <Initiator> <ID>314133b66967d86f031c7249d1d9a80249109428335cd0ef1cdc487b4566cb1b</ID> <DisplayName>string</DisplayName> </Initiator> <Owner> <ID>314133b66967d86f031c7249d1d9a80249109428335cd0ef1cdc487b4566cb1b</ID> <DisplayName>string</DisplayName> </Owner> <StorageClass>STANDARD</StorageClass> <Initiated>2010-11-26T19:24:17.000Z</Initiated> </Upload> <CommonPrefixes> <Prefix>photos/</Prefix> </CommonPrefixes> <CommonPrefixes> <Prefix>videos/</Prefix> </CommonPrefixes> </ListMultipartUploadsResult>
Sample Request for general purpose buckets
In addition to the delimiter parameter, you can filter results by adding a prefix parameter as shown in the following request.
GET /?uploads&delimiter=/&prefix=photos/2006/ HTTP/1.1 Host: example-bucket.s3.<Region>.amazonaws.com Date: Mon, 1 Nov 2010 20:34:56 GMT Authorization: authorization string
Sample Response for general purpose buckets
In this case, the response will include only multipart uploads for keys that start with the specified prefix. The value returned in the <CommonPrefixes> element is a substring from the beginning of the key to the first occurrence of the specified delimiter after the prefix.
<?xml version="1.0" encoding="UTF-8"?> <ListMultipartUploadsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Bucket>example-bucket</Bucket> <KeyMarker/> <UploadIdMarker/> <NextKeyMarker/> <NextUploadIdMarker/> <Delimiter>/</Delimiter> <Prefix>photos/2006/</Prefix> <MaxUploads>1000</MaxUploads> <IsTruncated>false</IsTruncated> <CommonPrefixes> <Prefix>photos/2006/February/</Prefix> </CommonPrefixes> <CommonPrefixes> <Prefix>photos/2006/January/</Prefix> </CommonPrefixes> <CommonPrefixes> <Prefix>photos/2006/March/</Prefix> </CommonPrefixes> </ListMultipartUploadsResult>
See Also
For more information about using this API in one of the language-specific Amazon SDKs, see the following: