> For the complete documentation index, see [llms.txt](https://docs.petabox.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.petabox.io/http-api-compatible-with-amazon-s3/api-reference/listparts.md).

# 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](/http-api-compatible-with-amazon-s3/api-reference/multipart-upload/startupload.md)). 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.

## Request Syntax <a href="#api_listparts_requestsyntax" id="api_listparts_requestsyntax"></a>

```http
GET /Key+?max-parts=MaxParts&part-number-marker=PartNumberMarker&uploadId=UploadId HTTP/1.1
Host: Bucket.s3.petabox.io
x-amz-request-payer: RequestPayer
x-amz-expected-bucket-owner: ExpectedBucketOwner
x-amz-server-side-encryption-customer-algorithm: SSECustomerAlgorithm
```

## URI Request Parameters <a href="#api_listparts_requestparameters" id="api_listparts_requestparameters"></a>

The request uses the following URI parameters.

#### Bucket

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

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.&#x20;

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.&#x20;

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

Not supported at the moment.

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

Not supported at the moment.

## Request Body <a href="#api_listparts_requestbody" id="api_listparts_requestbody"></a>

The request does not have a request body.

## Response Elements <a href="#api_listparts_responseelements" id="api_listparts_responseelements"></a>

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.&#x20;

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

#### Initiator

Container element that identifies who initiated the multipart upload. If the initiator is an Petabox 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`

#### UploadId

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

Type: String

## Examples <a href="#api_listparts_examples" id="api_listparts_examples"></a>

### Sample Request <a href="#api_listparts_example_1" id="api_listparts_example_1"></a>

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.

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

### Sample Response <a href="#api_listparts_example_2" id="api_listparts_example_2"></a>

This example illustrates one usage of ListParts.

```http
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: Petabox

<?xml version="1.0" encoding="UTF-8"?>
<ListPartsResult xmlns="http://s3.petabox.io/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>
```