Listing Multipart Uploads (SDK for Python)

Function

This API lists ongoing multipart uploads.

Ongoing multipart uploads are the multipart uploads that have been initiated but have not been completed or aborted. A maximum of 1,000 multipart uploads can be returned in a response. If there are over 1,000 ongoing tasks satisfying the list criteria, you need to send more requests to query additional multipart uploads.

Restrictions

To list multipart uploads, you must be the bucket owner or have the required permission (obs:bucket:ListBucketMultipartUploads in IAM or ListBucketMultipartUploads in a bucket policy). For details, see Introduction to OBS Access Control, IAM Custom Policies, and Configuring an Object Policy.
To list ongoing multipart uploads in a bucket, you must have the ListBucketMultipartUploads permission.
By default, only the bucket owner and multipart upload initiator have this permission. The bucket owner can grant others the ListBucketMultipartUploads permission.

Method

ObsClient.listMultipartUploads(bucketName, multipart)

Request Parameters

**Table 1** List of request parameters
Parameter	Type	Mandatory (Yes/No)	Description
bucket	str	Yes	Explanation: Bucket name Restrictions: A bucket name must be unique across all accounts and regions. A bucket name: Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed. Cannot be formatted as an IP address. Cannot start or end with a hyphen (-) or period (.). Cannot contain two consecutive periods (..), for example, my..bucket. Cannot contain periods (.) and hyphens (-) adjacent to each other, for example, my-.bucket or my.-bucket. If you repeatedly create buckets of the same name in the same region, no error will be reported and the bucket attributes comply with those set in the first creation request. Default value: None
multipart	ListMultipartUploadsRequest	No	Explanation: Request parameters for listing multipart uploads. For details, see Table 2.
encoding_type	str	No	Explanation: Encoding type for Key in the response. If Key in the response contains control characters that are not supported by the XML 1.0 standard, you can specify this parameter to encode Key. Value range: url Default value: None. If you leave this parameter blank, encoding is not applied to Key.

**Table 2** ListMultipartUploadsRequest
Parameter	Type	Mandatory (Yes/No)	Description
prefix	str	No	Explanation: Name prefix that the objects in the multipart uploads to be listed must contain Assume that you have the following objects: logs/day1, logs/day2, logs/day3, and ExampleObject.jpg. If you specify logs/ as the prefix, the multipart uploads of logs/day1, logs/day2, and logs/day3 will be returned. If you leave this parameter blank, all multipart uploads in the bucket will be returned. Restrictions: The value must contain 1 to 1,024 characters. Default value: None
max_uploads	int or str	No	Explanation: Maximum number of listed multipart uploads Restrictions: If the specified value is greater than 1000, only 1,000 multipart uploads are returned. Value range: An integer from 1 to 1000 Default value: 1000
delimiter	str	No	Explanation: Object names are grouped by this parameter, which is often used with prefix. If a prefix is specified, objects with the same string from the prefix to the first delimiter are grouped into one CommonPrefix. If no prefix is specified, objects with the same string from the first character to the first delimiter are grouped into one CommonPrefix. Assume that a bucket has objects abcd, abcde, and bbcde in it. If delimiter is set to d and prefix is set to a, objects abcd and abcde are grouped into a CommonPrefix with abcd as the prefix. If only delimiter is set to d, objects abcd and abcde are grouped into a CommonPrefix with abcd as the prefix, and bbcde is grouped separately into another CommonPrefix with bbcd as the prefix. Value range: The value must contain 1 to 1,024 characters. Default value: None
key_marker	str	No	Explanation: Object name after which the multipart upload listing begins Value range: The value of nextKeyMarker in the response body of the last request Default value: None
upload_id_marker	str	No	Explanation: Upload ID after which the multipart upload listing begins Restrictions: This parameter is valid only when used with key_marker. If both parameters are specified, multipart uploads with IDs greater than the specified uploadIdMarker for the specified keyMarker are listed. Value range: The value of nextUploadIdMarker in the response body of the last request Default value: None

Responses

**Table 3** List of returned results
Type	Description
GetResult	Explanation: SDK common results

**Table 4** GetResult
Parameter	Type	Description
status	int	Explanation: HTTP status code Value range: A status code is a group of digits ranging from 2xx (indicating successes) to 4xx or 5xx (indicating errors). It indicates the status of a response. For more information, see Status Code. Default value: None
reason	str	Explanation: Reason description. Default value: None
errorCode	str	Explanation: Error code returned by the OBS server. If the value of status is less than 300, this parameter is left blank. Default value: None
errorMessage	str	Explanation: Error message returned by the OBS server. If the value of status is less than 300, this parameter is left blank. Default value: None
requestId	str	Explanation: Request ID returned by the OBS server Default value: None
indicator	str	Explanation: Error indicator returned by the OBS server. Default value: None
hostId	str	Explanation: Requested server ID. If the value of status is less than 300, this parameter is left blank. Default value: None
resource	str	Explanation: Error source (a bucket or an object). If the value of status is less than 300, this parameter is left blank. Default value: None
header	list	Explanation: Response header list, composed of tuples. Each tuple consists of two elements, respectively corresponding to the key and value of a response header. Default value: None
body	object	Explanation: Result content returned after the operation is successful. If the value of status is larger than 300, this parameter is left blank. The value varies with the API being called. For details, see Bucket-Related APIs (SDK for Python) and Object-Related APIs (SDK for Python). Default value: None

**Table 5** GetResult.body
GetResult.body Type	Description
ListMultipartUploadsResponse	Explanation: Response to the request for listing multipart uploads

**Table 6** ListMultipartUploadsResponse
Parameter	Type	Description
bucket	str	Explanation: Bucket name Restrictions: A bucket name must be unique across all accounts and regions. A bucket name: Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed. Cannot be formatted as an IP address. Cannot start or end with a hyphen (-) or period (.). Cannot contain two consecutive periods (..), for example, my..bucket. Cannot contain periods (.) and hyphens (-) adjacent to each other, for example, my-.bucket or my.-bucket. If you repeatedly create buckets of the same name in the same region, no error will be reported and the bucket attributes comply with those set in the first creation request. Default value: None
keyMarker	str	Explanation: Object name after which the multipart upload listing begins, which is consistent with that set in the request. Value range: The value must contain 1 to 1,024 characters. Default value: None
uploadIdMarker	str	Explanation: Upload ID after which the multipart upload listing begins, which is consistent with that set in the request Value range: The value must contain 1 to 32 characters. Default value: None
nextKeyMarker	str	Explanation: Object name to start with for the next multipart upload listing request. nextKeyMarker is returned when not all the objects are listed. You can set key_marker to this value in the next request to list the remaining multipart uploads. Value range: The value must contain 1 to 1,024 characters. Default value: None
nextUploadIdMarker	str	Explanation: Upload ID to start with for the next multipart upload listing request. This parameter is used together with nextKeyMarker. nextUploadIdMarker is returned when not all the objects are listed. You can set upload_id_marker to this value in the next request to list the remaining multipart uploads. Value range: The value must contain 1 to 32 characters. Default value: None
maxUploads	int	Explanation: Maximum number of listed multipart uploads, which is consistent with that in the request Restrictions: If the specified value is greater than 1000, only 1,000 multipart uploads are returned. Value range: An integer from 1 to 1000 Default value: 1000
isTruncated	bool	Explanation: Whether all results are returned in the response Value range: true: Not all results are returned. false: All results are returned. Default value: None
prefix	str	Explanation: Prefix that the object names in the multipart uploads to be listed must contain. This parameter is consistent with that set in the request. Assume that you have the following objects: logs/day1, logs/day2, logs/day3, and ExampleObject.jpg. If you specify logs/ as the prefix, the multipart uploads of logs/day1, logs/day2, and logs/day3 will be returned. If you leave this parameter blank, all multipart uploads in the bucket will be returned. Restrictions: The value must contain 1 to 1,024 characters. Default value: None
delimiter	str	Explanation: A character used to group object names in multipart uploads, which is consistent with that set in the request. This parameter is often used with prefix. If a prefix is specified, objects with the same string from the prefix to the first delimiter are grouped into one CommonPrefixes. If no prefix is specified, objects with the same string from the first character to the first delimiter are grouped into one CommonPrefixes. Assume that a bucket has objects abcd, abcde, and bbcde in it. If delimiter is set to d and prefix is set to a, objects abcd and abcde are grouped into a CommonPrefixes with abcd as the prefix. If only delimiter is set to d, objects abcd and abcde are grouped into a CommonPrefixes with abcd as the prefix, and bbcde is grouped separately into another CommonPrefixes with bbcd as the prefix. Value range: The value must contain 1 to 1,024 characters. Default value: None
upload	list of Upload	Explanation: List of multipart uploads. For details, see Table 7. Default value: None
commonPrefixs	list of CommonPrefix	Explanation: List of object name prefixes grouped according to the delimiter parameter (if specified) Value range: The value must contain 1 to 1,024 characters. Default value: None
encoding_type	str	Explanation: Encoding type for key in the response. If key in the response contains control characters that are not supported by the XML 1.0 standard, you can specify this parameter to encode key. Value range: url Default value: None. If you leave this parameter blank, encoding is not applied to Key.

**Table 7** Upload
Parameter	Type	Description
key	str	Explanation: Name of the object to be uploaded. An object is uniquely identified by an object name in a bucket. An object name is a complete path that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.eu-west-101.myhuaweicloud.eu/folder/test.txt, the object name is folder/test.txt. Value range: The value must contain 1 to 1,024 characters. Default value: None
uploadId	str	Explanation: Multipart upload ID, for example, 000001648453845DBB78F2340DD460D8 Value range: The value must contain 1 to 32 characters. Default value: None
initiator	Initiator	Explanation: Initiator of the multipart upload. For details, see Table 9. Default value: None
owner	Owner	Explanation: Owner of the multipart upload, which is consistent with initiator. For details, see Table 10. Default value: None
storageClass	str	Explanation: Storage class of the object to be uploaded Value range: See Table 11. Default value: None
initiated	str	Explanation: Time when the multipart upload is initiated Restrictions: The time must be in the ISO8601 format, for example, 2018-01-01T00:00:00.000Z. Sample code: DateTime(year=2023, month=9, day=12) Default value: None

**Table 8** CommonPrefix
Parameter	Type	Description
prefix	str	Explanation: List of object name prefixes grouped according to the delimiter parameter (if specified) Value range: The value must contain 1 to 1,024 characters. Default value: None

**Table 9** Initiator
Parameter	Type	Mandatory (Yes/No)	Description
id	str	Yes if used as a request parameter	Explanation: Account (domain) ID of the initiator Value range: To obtain an account ID, see Obtaining the Account ID. Default value: None
name	str	No if used as a request parameter	Explanation: Account name of the initiator Restrictions: The account name can contain 6 to 32 characters and must start with a letter. Only letters, digits, hyphens (-), and underscores (_) are allowed. Default value: None

**Table 10** Owner
Parameter	Type	Mandatory (Yes/No)	Description
owner_id	str	Yes if used as a request parameter	Explanation: Account (domain) ID of the owner Value range: To obtain the account ID, see How Do I Get My Account ID and IAM User ID? (SDK for Python) Default value: None
owner_name	str	No if used as a request parameter	Explanation: Account name of the owner Value range: To obtain the account ID, see How Do I Get My Account ID and IAM User ID? (SDK for Python) Default value: None

**Table 11** StorageClass
Parameter	Type	Description
STANDARD	Standard storage class	Explanation: Features low access latency and high throughput and is used for storing massive, frequently accessed (multiple times a month) or small objects (< 1 MB) requiring quick response.
WARM	Infrequent Access storage class	Explanation: Used for storing data that is semi-frequently accessed (fewer than 12 times a year) but is instantly available when needed.
COLD	Archive storage class	Explanation: Used for storing rarely accessed (once a year) data.

Code Examples

This example lists multipart uploads in a bucket.

    
     
       
       
         from obs import ObsClient
from obs import ListMultipartUploadsRequest
import os
import traceback

# Obtain an AK and SK pair using environment variables or import the AK and SK pair in other ways. Using hard coding may result in leakage.
# Obtain an AK and SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
ak = os.getenv("AccessKeyID")
sk = os.getenv("SecretAccessKey")
# (Optional) If you use a temporary AK and SK pair and a security token to access OBS, obtain them from environment variables.
security_token = os.getenv("SecurityToken")
# Set server to the endpoint corresponding to the bucket. Here uses EU-Dublin as an example. Replace it with the one in use.
server = "https://obs.eu-west-101.myhuaweicloud.eu" 

# Create an obsClient instance.
# If you use a temporary AK and SK pair and a security token to access OBS, you must specify security_token when creating an instance.
obsClient = ObsClient(access_key_id=ak, secret_access_key=sk, server=server)
try:
    bucketName = "examplebucket"
    # Specify the prefix that the object names in the multipart uploads to be listed must contain.
    prefix = 'prefix'
    # Specify the maximum number (10 as an example) of returned multipart uploads. The value ranges from 1 to 1,000. If the value is not in this range, 1,000 is returned by default.
    max_uploads = 10
    # Specify request parameters for listing multipart uploads.
    multipart = ListMultipartUploadsRequest(prefix=prefix, max_uploads=max_uploads)
    # List multipart uploads in a bucket.
    resp = obsClient.listMultipartUploads(bucketName, multipart, encoding_type='url')

    # If status code 2xx is returned, the API is called successfully. Otherwise, the API call fails.
    if resp.status < 300:
        print('List Multipart Uploads Succeeded')
        print('requestId:', resp.requestId)
        print('bucket:', resp.body.bucket)
        print('prefix:', resp.body.prefix)
        print('maxUploads:', resp.body.maxUploads)
        print('isTruncated:', resp.body.isTruncated)
        index = 1
        for upload in resp.body.upload:
            print('upload [' + str(index) + ']')
            print('key:', upload.key)
            print('uploadId:', upload.uploadId)
            print('storageClass:', upload.storageClass)
            print('initiated:', upload.initiated)
            print('owner_id:', upload.owner.owner_id)
            print('owner_name:', upload.owner.owner_name)
            index += 1
    else:
        print('List Multipart Uploads Failed')
        print('requestId:', resp.requestId)
        print('errorCode:', resp.errorCode)
        print('errorMessage:', resp.errorMessage)
except:
    print('List Multipart Uploads Failed')
    print(traceback.format_exc())

        

      

    
   