List objects by calling GetBucket (ListObjects) - Object Storage Service

Lists information about all objects in an Object Storage Service (OSS) bucket.

Usage notes

The GetBucket (ListObjects) operation is updated to GetBucketV2 (ListObjectsV2). When you develop your applications, we recommend that you call the GetBucketV2 (ListObjectsV2) operation. To provide backward compatibility, OSS continues to support the GetBucket (ListObjects) operation. For more information about GetBucketV2 (ListObjectsV2), see ListObjectsV2 (GetBucketV2).
The user metadata of objects is not returned for GetBucket (ListObjects) requests.
The GetBucket (ListObjects) operation is performed on buckets. You are charged for PUT requests based on the storage class of the bucket. You are charged an API calling fee each time you call the GetBucket (ListObjects) operation. For more information, see API operation calling fees.

Request syntax

GET / HTTP/1.1
Host: BucketName.oss-cn-hangzhou.aliyuncs.com
Date: GMT Date
Authorization: SignatureValue

Request headers

A GetBucket (ListObjects) request contains only common request headers, such as Authorization and Host. For more information, see Common request headers.

Request parameters

Parameter	Type	Required	Example	Description
delimiter	String	No	/	The character that you want to use to group objects by name. If you specify the delimiter parameter in the request, the response contains the CommonPrefixes parameter. The objects whose names contain the same string from the prefix to the next occurrence of the delimiter are grouped as a single result element in CommonPrefixes. By default, this parameter is left empty.
marker	String	No	test1.txt	The name of the object after which the ListObjects (GetBucket) operation starts. If this parameter is specified, objects whose names are alphabetically after the marker are returned. The marker parameter is used to list the returned objects by page, and the value of marker must be smaller than 1,024 bytes in length. Even if the specified marker does not exist in the list during a conditional query, the list starts from the object whose name is alphabetically after the value of the marker parameter. By default, this parameter is left empty.
max-keys	String	No	200	The maximum number of objects that can be returned. If the list operation cannot be complete at a time due to the max-keys parameter settings, the NextMarker parameter is included in the response as the marker for the next list operation. Valid values: 1 to 1000 Default value: 100
prefix	String	No	fun	The prefix in the names of the objects that you want to list. The value of prefix must be smaller than 1,024 bytes in length. If you specify a prefix, the names of the returned objects contain the prefix. If prefix is set to a directory name in the request, the objects whose names contain this prefix are listed, which includes all objects and subdirectories in the directory. If prefix is specified and delimiter is set to a forward slash (/), only objects in the directory are listed. The names of the subdirectories in the directory are returned in the CommonPrefixes parameter. However, objects and directories in the subdirectories are not listed. For example, a bucket contains the following objects: fun/test.jpg, fun/movie/001.avi, and fun/movie/007.avi. If prefix is set to fun/, the three objects are returned. If prefix is set to fun/ and delimiter is set to a forward slash (/), fun/test.jpg and fun/movie/ are returned. By default, this parameter is left empty.
encoding-type	String	No	URL	The encoding type of the object names in the response. By default, this parameter is left empty. Valid value: URL Important The values of delimiter, marker, prefix, NextMarker, and Key are UTF-8 encoded. If the value of delimiter, marker, prefix, NextMarker, or Key contains a control character that is not supported by the XML 1.0 standard, you can specify the encoding-type parameter to encode the value in the response.

Response elements

Element	Type	Example	Description
ListBucketResult	Container	N/A	The container that stores the response to the GetBucket (ListObjects) operation. Child nodes: Name, Prefix, Marker, MaxKeys, Delimiter, IsTruncated, NextMarker, and Contents Parent node: None
Name	String	oss-example	The name of the bucket. Parent nodes: ListBucketResult
Prefix	String	fun/	The prefix contained in the names of the returned buckets. Parent nodes: ListBucketResult or CommonPrefixes
Marker	String	test1.txt	The name of the object after which the list operation starts. Parent nodes: ListBucketResult
MaxKeys	String	100	The maximum number of returned objects in the response. Parent nodes: ListBucketResult
Delimiter	String	/	The character that is used to group objects by name. The objects whose names contain the same string from the prefix to the next occurrence of the delimiter are grouped as a single result element in the CommonPrefixes parameter. Parent nodes: ListBucketResult
EncodingType	String	url	The encoding type of the object name in the response. If you specify the encoding-type parameter in the request, the following parameters in the response are encoded: Delimiter, Marker, Prefix, NextMarker, and Key. Parent nodes: ListBucketResult
IsTruncated	Enumerated string	false	Indicates whether the returned results are truncated. Valid values: true and false true indicates that not all results are returned this time. false indicates that all results are returned this time. Parent nodes: ListBucketResult
NextMarker	String	test100.txt	The position from which the next list operation starts. Parent nodes: ListBucketResult
Contents	Container	N/A	The container that stores the metadata of each returned object. Parent nodes: ListBucketResult
Key	String	fun/test.jpg	The key of the object. Parent nodes: ListBucketResult.Contents
TransitionTime	Time	2024-04-23T07:21:42.000Z	The time when the storage class of the object is converted to Cold Archive or Deep Cold Archive based on lifecycle rules. Note If the object is stored for more than 180 days after the storage class of the object is converted, you are not charged for the storage usage of the Cold Archive or Deep Cold Archive object that is stored for less than the minimum storage duration. If the object is stored for less than 180 days after the storage class of the object is converted, you are charged for the storage usage of the Cold Archive or Deep Cold Archive object that is stored for less than the minimum storage duration. You cannot use this header to query the time when the storage class of the object is converted to Infrequent Access (IA) or Archive based on lifecycle rules. You can determine whether the object is stored for more than the minimum storage duration based on the value of the `Last-Modified` header. Parent nodes: ListBucketResult.Contents
LastModified	Time	2012-02-24T08:42:32.000Z	The last modified time of the object. Note The minimum storage duration (30 days) of IA objects is calculated based on the last modified time of the objects. If the value of the Last-Modified header is 30 days earlier than the current time, you are not charged for the storage usage of the IA object that is stored for less than the minimum storage duration. The minimum storage duration (60 days) of Archive objects is calculated based on the last modified time of the objects. If the value of the Last-Modified header is 60 days earlier than the current time, you are not charged for the storage usage of the Archive object that is stored for less than the minimum storage duration. Parent nodes: ListBucketResult.Contents
ETag	String	5B3C1A2E053D763E1B002CC607C5A0FE1****	The entity tag (ETag). An ETag is created when an object is created to identify the content of the object. If an object is created by calling the PutObject operation, the ETag value of the object is the MD5 hash of the object content. If an object is created by using another method, the ETag value is not the MD5 hash of the object content but a unique value that is calculated based on a specific rule. The ETag value of an object can be used to check whether the object content is modified. We recommend that you use the MD5 hash of an object rather than the ETag value of the object to verify data integrity. Parent nodes: ListBucketResult.Contents
Type	String	Normal	The type of the object. Valid values: Normal: The object is uploaded by using simple upload. Multipart: The object is uploaded by using multipart upload. Appendable: The object is uploaded by using append upload.
Size	String	344606	The size of the returned object. Unit: bytes. Parent nodes: ListBucketResult.Contents
StorageClass	String	Standard	The storage class of the object. Parent nodes: ListBucketResult.Contents
RestoreInfo	String	ongoing-request="true"	The restoration status of the object. If no RestoreObject requests are sent or the requests expire, this element is not included in the response. If a RestoreObject request is sent but the restoration is not complete, the value of the RestoreInfo element is `ongoing-request="true"`. If a RestoreObject request is sent and the restoration is complete, the value of the RestoreInfo element is in the `ongoing-request="false", expiry-date="Thu, 24 Sep 2020 12:40:33 GMT"` format, in which the `expiry-date` element indicates the time before which the restored object can be read.
Owner	Container	N/A	The container that stores information about the bucket owner. Child nodes: DisplayName and ID Parent nodes: Contents
ID	String	0022012****	The user ID of the bucket owner. Parent nodes: ListBucketResult.Contents.Owner
DisplayName	String	user_example	The name of the object owner. Parent nodes: ListBucketResult.Contents.Owner
CommonPrefixes	Container	N/A	If Delimiter is specified in the request, the response contains the CommonPrefixes parameter. The objects whose names contain the same string from the prefix to the next occurrence of the delimiter are grouped as a single result element in the CommonPrefixes parameter. Parent nodes: ListBucketResult

For more information about common response headers, such as x-oss-request-id and Content-Type, see Common response headers.

Examples

Sample request for a simple ListObjectsV2 (GetBucketV2) operation

GET / HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 24 Feb 2012 08:43:27 GMT
Authorization: OSS qn6q**************:77Dv****************

Sample success responses

HTTP/1.1 200 OK
x-oss-request-id: 534B371674E88A4D8906****
Date: Fri, 24 Feb 2012 08:43:27 GMT
Content-Type: application/xml
Content-Length: 1866
Connection: keep-alive
Server: AliyunOSS
<?xml version="1.0" encoding="UTF-8"?>
<ListBucketResult xmlns="http://doc.oss-cn-hangzhou.aliyuncs.com">
<Name>examplebucket</Name>
<Prefix></Prefix>
<Marker></Marker>
<MaxKeys>100</MaxKeys>
<Delimiter></Delimiter>
<IsTruncated>false</IsTruncated>
<Contents>
      <Key>fun/movie/001.avi</Key>
      <TransitionTime>2024-04-23T07:21:42.000Z</TransitionTime>
      <LastModified>2012-02-24T08:43:07.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user-example</DisplayName>
      </Owner>
</Contents>
<Contents>
      <Key>fun/movie/007.avi</Key>
      <LastModified>2012-02-24T08:43:27.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user-example</DisplayName>
      </Owner>
</Contents>
<Contents>
      <Key>fun/test.jpg</Key>
      <LastModified>2012-02-24T08:42:32.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user-example</DisplayName>
      </Owner>
</Contents>
<Contents>
      <Key>oss.jpg</Key>
      <LastModified>2012-02-24T06:07:48.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user-example</DisplayName>
      </Owner>
</Contents>
</ListBucketResult>

Sample request in which the prefix parameter is specified

GET /?prefix=fun HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 24 Feb 2012 08:43:27 GMT
Authorization: OSS qn6q**************:77Dv****************

Sample success responses

HTTP/1.1 200 OK
x-oss-request-id: 534B371674E88A4D8906****
Date: Fri, 24 Feb 2012 08:43:27 GMT
Content-Type: application/xml
Content-Length: 1464
Connection: keep-alive
Server: AliyunOSS
<?xml version="1.0" encoding="UTF-8"?>
<ListBucketResult xmlns="http://doc.oss-cn-hangzhou.aliyuncs.com">
<Name>examplebucket</Name>
<Prefix>fun</Prefix>
<Marker></Marker>
<MaxKeys>100</MaxKeys>
<Delimiter></Delimiter>
<IsTruncated>false</IsTruncated>
<Contents>
      <Key>fun/movie/001.avi</Key>
      <LastModified>2012-02-24T08:43:07.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user_example</DisplayName>
      </Owner>
</Contents>
<Contents>
      <Key>fun/movie/007.avi</Key>
      <LastModified>2012-02-24T08:43:27.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user_example</DisplayName>
      </Owner>
</Contents>
<Contents>
      <Key>fun/test.jpg</Key>
      <LastModified>2012-02-24T08:42:32.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user_example</DisplayName>
      </Owner>
</Contents>
</ListBucketResult>

Sample request in which prefix and delimiter parameters are specified

GET /?prefix=fun/&delimiter=/ HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 24 Feb 2012 08:43:27 GMT
Authorization: OSS qn6q**************:77Dv****************

Sample success responses

HTTP/1.1 200 OK
x-oss-request-id: 534B371674E88A4D8906****
Date: Fri, 24 Feb 2012 08:43:27 GMT
Content-Type: application/xml
Content-Length: 712
Connection: keep-alive
Server: AliyunOSS
<?xml version="1.0" encoding="UTF-8"?>
<ListBucketResult xmlns="http://doc.oss-cn-hangzhou.aliyuncs.com">
<Name>examplebucket</Name>
<Prefix>fun/</Prefix>
<Marker></Marker>
<MaxKeys>100</MaxKeys>
<Delimiter>/</Delimiter>
<IsTruncated>false</IsTruncated>
<Contents>
      <Key>fun/test.jpg</Key>
      <LastModified>2012-02-24T08:42:32.000Z</LastModified>
      <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
      <Type>Normal</Type>
      <Size>344606</Size>
      <StorageClass>Standard</StorageClass>
      <Owner>
          <ID>0022012****</ID>
          <DisplayName>user_example</DisplayName>
      </Owner>
</Contents>
<CommonPrefixes>
      <Prefix>fun/movie/</Prefix>
</CommonPrefixes>
</ListBucketResult>

Sample request in which marker parameter is specified

In this example, the max-keys parameter is set to 2, which indicates that the maximum number of objects to return is 2.

GET /?max-keys=2&marker=test1.txt HTTP/1.1
Host: examplebucket.oss-cn-shenzhen.aliyuncs.com
Accept-Encoding: identity
Accept: */*
Connection: keep-alive
User-Agent: aliyun-sdk-python/2.11.0(Darwin/18.2.0/x86_64;3.4.1)
date: Tue, 26 May 2020 08:39:48 GMT
authorization: OSS qn6q**************:77Dv****************

Sample success responses

The NextMarker parameter in the response indicates the marker for the next list operation.

HTTP/1.1 200 OK
Server: AliyunOSS
Date: Tue, 26 May 2020 08:39:48 GMT
Content-Type: application/xml
Content-Length: 1032
Connection: keep-alive
x-oss-request-id: 5ECCD5D4881816373582xxx
x-oss-server-time: 3

<?xml version="1.0" encoding="UTF-8"?>
<ListBucketResult>
  <Name>examplebucket</Name>
  <Prefix></Prefix>
  <Marker>test1.txt</Marker>
  <MaxKeys>2</MaxKeys>
  <Delimiter></Delimiter>
  <EncodingType>url</EncodingType>
  <IsTruncated>true</IsTruncated>
  <NextMarker>test100.txt</NextMarker>
  <Contents>
    <Key>test10.txt</Key>
    <LastModified>2020-05-26T07:50:18.000Z</LastModified>
    <ETag>"C4CA4238A0B923820DCC509A6F75****"</ETag>
    <Type>Normal</Type>
    <Size>1</Size>
    <StorageClass>Standard</StorageClass>
    <Owner>
      <ID>1305433xxx</ID>
      <DisplayName>1305433xxx</DisplayName>
    </Owner>
  </Contents>
  <Contents>
    <Key>test100.txt</Key>
    <LastModified>2020-05-26T07:50:20.000Z</LastModified>
    <ETag>"C4CA4238A0B923820DCC509A6F75****"</ETag>
    <Type>Normal</Type>
    <Size>1</Size>
    <StorageClass>Standard</StorageClass>
    <Owner>
      <ID>1305433xxx</ID>
      <DisplayName>1305433xxx</DisplayName>
    </Owner>
  </Contents>
</ListBucketResult>

Sample request that lists all objects in a bucket, including Archive or Cold Archive objects

In this example, the examplebucket bucket contains the following Cold Archive objects: exampleobject1.txt, exampleobject2.txt, and exampleobject3.txt. The three objects are in the following states:

No RestoreObject requests are sent to restore exampleobject1.txt or the RestoreObject requests sent to restore the object have expired.
A RestoreObject request is sent to restore exampleobject2.txt and the object is being restored.
A RestoreObject request is sent to restore exampleobject3.txt and the object is restored.

Sample requests

GET / HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Date: Fri, 24 Feb 2012 08:43:27 GMT
Authorization: OSS qn6q**************:77Dv****************

Sample success responses

HTTP/1.1 200 OK
x-oss-request-id: 534B371674E88A4D8906****
Date: Date: Fri, 24 Feb 2012 08:43:27 GMT
Content-Type: application/xml
Content-Length: 1866
Connection: keep-alive
Server: AliyunOSS
<?xml version="1.0" encoding="UTF-8"?>
<ListBucketResult xmlns="http://doc.oss-cn-hangzhou.aliyuncs.com">
  <Name>examplebucket</Name>
  <Prefix></Prefix>
  <Marker></Marker>
  <MaxKeys></MaxKeys>
  <Delimiter></Delimiter>
  <IsTruncated>false</IsTruncated>
  <Contents>
        <Key>exampleobject1.txt</Key>
        <LastModified>2020-06-22T11:42:32.000Z</LastModified>
        <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
        <Type>Normal</Type>
        <Size>344606</Size>
        <StorageClass>ColdArchive</StorageClass>
        <Owner>
            <ID>0022012****</ID>
            <DisplayName>user-example</DisplayName>
        </Owner>
  </Contents>
  <Contents>
        <Key>exampleobject2.txt</Key>
        <LastModified>2020-06-22T11:42:32.000Z</LastModified>
        <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
        <Type>Normal</Type>
        <Size>344606</Size>
        <StorageClass>Standard</StorageClass>
        <RestoreInfo>ongoing-request="true"</RestoreInfo>
        <Owner>
            <ID>0022012****</ID>
            <DisplayName>user-example</DisplayName>
        </Owner>
  </Contents>
  <Contents>
        <Key>exampleobject3.txt</Key>
        <LastModified>2020-06-22T11:42:32.000Z</LastModified>
        <ETag>"5B3C1A2E053D763E1B002CC607C5A0FE1****"</ETag>
        <Type>Normal</Type>
        <Size>344606</Size>
        <StorageClass>Standard</StorageClass>
        <RestoreInfo>ongoing-request="false", expiry-date="Thu, 24 Sep 2020 12:40:33 GMT"</RestoreInfo>
        <Owner>
            <ID>0022012****</ID>
            <DisplayName>user-example</DisplayName>
        </Owner>
  </Contents>
</ListBucketResult>

SDK

You can use OSS SDKs for the following programming languages to call the GetBucket (ListObjects) operation:

Error codes

Error code	HTTP status code	Description
NoSuchBucket	404	The requested bucket does not exist. Check whether the name of the requested bucket complies with the naming rules.
AccessDenied	403	You do not have the permissions to access the bucket. Only the bucket owner and RAM users who are granted the `oss:ListObjects` permission can access the bucket.
InvalidArgument	400	The value of max-keys is less than 0 or greater than 1,000. The length of the value of prefix, marker, or delimiter is invalid.