ListParts - Amazon Simple Storage Service
Request SyntaxURI Request ParametersRequest BodyResponse SyntaxResponse ElementsExamplesSee Also
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ListParts

Lists the parts that have been uploaded for a specific multipart upload. This operation must include the upload ID, which you obtain by sending the initiate multipart upload request (see CreateMultipartUpload). This request returns a maximum of 1,000 uploaded parts. The default number of parts returned is 1,000 parts. You can restrict the number of parts returned by specifying the max-parts request parameter. If your multipart upload consists of more than 1,000 parts, the response returns an IsTruncated field with the value of true, and a NextPartNumberMarker element. In subsequent ListParts requests you can include the part-number-marker query string parameter and set its value to the NextPartNumberMarker field value from the previous response.

If the upload was created using a checksum algorithm, you will need to have permission to the kms:Decrypt action for the request to succeed.

For more information on multipart uploads, see Uploading Objects Using Multipart Upload.

For information on permissions required to use the multipart upload API, see Multipart Upload and Permissions.

The following operations are related to ListParts:

Request Syntax

GET /Key+?max-parts=MaxParts&part-number-marker=PartNumberMarker&uploadId=UploadId HTTP/1.1
Host: Bucket.s3.amazonaws.com
x-amz-request-payer: RequestPayer
x-amz-expected-bucket-owner: ExpectedBucketOwner
x-amz-server-side-encryption-customer-algorithm: SSECustomerAlgorithm
x-amz-server-side-encryption-customer-key: SSECustomerKey
x-amz-server-side-encryption-customer-key-MD5: SSECustomerKeyMD5

URI Request Parameters

The request uses the following URI parameters.

Bucket

The name of the bucket to which the parts are being uploaded.

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 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.

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

Key

Object key for which the multipart upload was initiated.

Length Constraints: Minimum length of 1.

Required: Yes

max-parts

Sets the maximum number of parts to return.

part-number-marker

Specifies the part after which listing should begin. Only parts with higher part numbers will be listed.

uploadId

Upload ID identifying the multipart upload whose parts are being listed.

Required: Yes

x-amz-expected-bucket-owner

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).

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 Amazon 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.

Valid Values: requester

x-amz-server-side-encryption-customer-algorithm

The server-side encryption (SSE) algorithm used to encrypt the object. This parameter is needed only when the object was created using a checksum algorithm. For more information, see Protecting data using SSE-C keys in the Amazon S3 User Guide.

x-amz-server-side-encryption-customer-key

The server-side encryption (SSE) customer managed key. This parameter is needed only when the object was created using a checksum algorithm. For more information, see Protecting data using SSE-C keys in the Amazon S3 User Guide.

x-amz-server-side-encryption-customer-key-MD5

The MD5 server-side encryption (SSE) customer managed key. This parameter is needed only when the object was created using a checksum algorithm. For more information, see Protecting data using SSE-C keys in the Amazon S3 User Guide.

Request Body

The request does not have a request body.

Response Syntax

HTTP/1.1 200
x-amz-abort-date: AbortDate
x-amz-abort-rule-id: AbortRuleId
x-amz-request-charged: RequestCharged
<?xml version="1.0" encoding="UTF-8"?>
<ListPartsResult>
   <Bucket>string</Bucket>
   <Key>string</Key>
   <UploadId>string</UploadId>
   <PartNumberMarker>integer</PartNumberMarker>
   <NextPartNumberMarker>integer</NextPartNumberMarker>
   <MaxParts>integer</MaxParts>
   <IsTruncated>boolean</IsTruncated>
   <Part>
      <ChecksumCRC32>string</ChecksumCRC32>
      <ChecksumCRC32C>string</ChecksumCRC32C>
      <ChecksumSHA1>string</ChecksumSHA1>
      <ChecksumSHA256>string</ChecksumSHA256>
      <ETag>string</ETag>
      <LastModified>timestamp</LastModified>
      <PartNumber>integer</PartNumber>
      <Size>long</Size>
   </Part>
   ...
   <Initiator>
      <DisplayName>string</DisplayName>
      <ID>string</ID>
   </Initiator>
   <Owner>
      <DisplayName>string</DisplayName>
      <ID>string</ID>
   </Owner>
   <StorageClass>string</StorageClass>
   <ChecksumAlgorithm>string</ChecksumAlgorithm>
</ListPartsResult>

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The response returns the following HTTP headers.

x-amz-abort-date

If the bucket has a lifecycle rule configured with an action to abort incomplete multipart uploads and the prefix in the lifecycle rule matches the object name in the request, then the response includes this header indicating when the initiated multipart upload will become eligible for abort operation. For more information, see Aborting Incomplete Multipart Uploads Using a Bucket Lifecycle Configuration.

The response will also include the x-amz-abort-rule-id header that will provide the ID of the lifecycle configuration rule that defines this action.

x-amz-abort-rule-id

This header is returned along with the x-amz-abort-date header. It identifies applicable lifecycle configuration rule that defines the action to abort incomplete multipart uploads.

x-amz-request-charged

If present, indicates that the requester was successfully charged for the request.

Valid Values: requester

The following data is returned in XML format by the service.

ListPartsResult

Root level tag for the ListPartsResult 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

ChecksumAlgorithm

The algorithm that was used to create a checksum of the object.

Type: String

Valid Values: CRC32 | CRC32C | SHA1 | SHA256

Initiator

Container element that identifies who initiated the multipart upload. If the initiator is an Amazon Web Services account, this element provides the same information as the Owner element. If the initiator is an IAM User, this element provides the user ARN and display name.

Type: Initiator data type

IsTruncated

Indicates whether the returned list of parts is truncated. A true value indicates that the list was truncated. A list can be truncated if the number of parts exceeds the limit returned in the MaxParts element.

Type: Boolean

Key

Object key for which the multipart upload was initiated.

Type: String

Length Constraints: Minimum length of 1.

MaxParts

Maximum number of parts that were allowed in the response.

Type: Integer

NextPartNumberMarker

When a list is truncated, this element specifies the last part in the list, as well as the value to use for the part-number-marker request parameter in a subsequent request.

Type: Integer

Owner

Container element that identifies the object owner, after the object is created. If multipart upload is initiated by an IAM user, this element provides the parent account ID and display name.

Type: Owner data type

Part

Container for elements related to a particular part. A response can contain zero or more Part elements.

Type: Array of Part data types

PartNumberMarker

When a list is truncated, this element specifies the last part in the list, as well as the value to use for the part-number-marker request parameter in a subsequent request.

Type: Integer

StorageClass

Class of storage (STANDARD or REDUCED_REDUNDANCY) used to store the uploaded object.

Type: String

Valid Values: STANDARD | REDUCED_REDUNDANCY | STANDARD_IA | ONEZONE_IA | INTELLIGENT_TIERING | GLACIER | DEEP_ARCHIVE | OUTPOSTS | GLACIER_IR | SNOW

UploadId

Upload ID identifying the multipart upload whose parts are being listed.

Type: String

Examples

Sample Request

Assume you have uploaded parts with sequential part numbers starting with 1. The following List Parts request specifies max-parts and part-number-marker query parameters. The request lists the first two parts that follow part number 1, that is, you will get parts 2 and 3 in the response. If more parts exist, the result is a truncated result and therefore the response will return an IsTruncated element with the value true. The response will also return the NextPartNumberMarker element with the value 3, which should be used for the value of the part-number-marker request query string parameter in the next ListParts request. 


GET /example-object?uploadId=XXBsb2FkIElEIGZvciBlbHZpbmcncyVcdS1tb3ZpZS5tMnRzEEEwbG9hZA&max-parts=2&part-number-marker=1 HTTP/1.1
Host: example-bucket.s3.<Region>.amazonaws.com
Date: Mon, 1 Nov 2010 20:34:56 GMT
Authorization: authorization string

Sample Response

This example illustrates one usage of ListParts.


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: 985
Connection: keep-alive
Server: AmazonS3

<?xml version="1.0" encoding="UTF-8"?>
<ListPartsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
  <Bucket>example-bucket</Bucket>
  <Key>example-object</Key>
  <UploadId>XXBsb2FkIElEIGZvciBlbHZpbmcncyVcdS1tb3ZpZS5tMnRzEEEwbG9hZA</UploadId>
  <Initiator>
      <ID>arn:aws:iam::111122223333:user/some-user-11116a31-17b5-4fb7-9df5-b288870f11xx</ID>
      <DisplayName>umat-user-11116a31-17b5-4fb7-9df5-b288870f11xx</DisplayName>
  </Initiator>
  <Owner>
    <ID>75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a</ID>
    <DisplayName>someName</DisplayName>
  </Owner>
  <StorageClass>STANDARD</StorageClass>
  <PartNumberMarker>1</PartNumberMarker>
  <NextPartNumberMarker>3</NextPartNumberMarker>
  <MaxParts>2</MaxParts>
  <IsTruncated>true</IsTruncated>
  <Part>
    <PartNumber>2</PartNumber>
    <LastModified>2010-11-10T20:48:34.000Z</LastModified>
    <ETag>"7778aef83f66abc1fa1e8477f296d394"</ETag>
    <Size>10485760</Size>
  </Part>
  <Part>
    <PartNumber>3</PartNumber>
    <LastModified>2010-11-10T20:48:33.000Z</LastModified>
    <ETag>"aaaa18db4cc2f85cedef654fccc4a4x8"</ETag>
    <Size>10485760</Size>
  </Part>
</ListPartsResult>

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: