List Parts

The List Parts operation catalogs the parts that have been uploaded for a specific multipart upload. The operation must include the upload ID, which is obtained when the initiate multipart upload request is sent (refer to Initiate Multipart Upload).

List Parts returns a maximum of 1,000 parts (which is also the default setting for parts returned, adjustable via the max-parts request parameter). If the 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 List Parts requests it is possible to include the part-number-marker query string parameter and set its value to the NextPartNumberMarker field value from the previous response.



GET /{{ObjectName}}?uploadId={{UploadId}} HTTP/1.1
Host: {{BucketName}}.{{StorageService}}.com
Date: {{date}}
Authorization: {{authorizationString}}


The List Parts operation’s GET implementation uses fixed parameters to return a subset of a bucket’s objects.

Parameter Type Description
encoding-type string

Requests that Zenko encode the response and specifies the encoding method to use. An object key can contain any Unicode character; however, XML 1.0 parser cannot parse some characters, such as characters with an ASCII value from 0 to 10. For characters that are not supported in XML 1.0, you can add this parameter to request that Zenko encode the keys in the response.

Default: None

uploadID string

Upload ID identifying the multipart upload whose parts are being listed

Default: None

max-parts string

Sets the maximum number of parts to return in the response body

Default: None

part-number-marker string

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

Default: None


The List Parts operation uses only request headers that are common to all operations (refer to Common Request Headers).


The List Parts operation does not use request elements.



The List Parts operation uses only the common response headers supported by Zenko (see Common Response Headers).


The List Parts operation can return the following XML elements in its response (includes XML containers):

Element Type Description
ListPartsResult container Container for the response
Bucket string Name of the bucket to which the multipart upload was initiated
Encoding-Type string

Encoding type used by Zenko to encode object key names in the XML response.

If the encoding-type request parameter is specified, Zenko includes this element in the response, and returns encoded key name values in the Key element.

Key string Object key for which the multipart upload was initiated
UploadId string Upload ID identifying the multipart upload whose parts are being listed
Initiator container Container element that identifies who initiated the multipart upload
ID string User ID
DisplayName string Principal’s name
Owner container Container element that identifies the object owner, after the object is created
PartNumberMarker integer Part number after which listing begins
NextPartNumberMarker integer 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.
MaxParts integer Maximum number of parts allowed in the response
IsTruncated Boolean 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.
Part string Container for elements related to a particular part. A response can contain zero or more Part elements.
PartNumber integer Part number identifying the part
LastModified date Date and time when the part was uploaded
ETag string Entity tag returned when the part was uploaded
Size integer Size of the uploaded part data


List Parts

Assume parts have been uploaded with sequential part numbers starting with 1.

The following example request specifies max-parts and part-number-marker query parameters. It lists the first two parts that follow part 1 (i.e., parts 2 and 3) in the response. If more parts exist, the result is truncated and the response returns an IsTruncated element with the value true. The response also returns 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 List Parts request.


GET /example-object?uploadId=XXBsb2FkIElEIGZvciBlbHZpbmcncyVcdS1tb3ZpZS5tMnRzEEEwbG9hZA&max-parts=2&part-number-marker=1 HTTP/1.1
Host:  example-bucket.{{StorageService}}.com
Date: Mon, 1 Nov 2010 20:34:56 GMT
Authorization: {{authorizationString}}


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: ScalityS3
<?xml version="1.0" encoding="UTF-8"?>
<ListPartsResult xmlns="">