List objects

To list the objects in a bucket you make a GET request that is scoped to a bucket. You can also use query string parameters to further scope the request. The request returns the list of objects in an XML document in the response body.

You must have bucket READ permission to get the list of objects that are in a bucket, and you must have bucket FULL_CONTROL permission to list a bucket's ACLs or CORS.

You can restrict and organize the list of objects that is returned in a GET Bucket request by using the delimiter, marker, max-keys, and prefix query string parameters. The marker query string parameter is a string of Unicode characters that specifies the object after which you want to start listing objects. Any objects whose names are lexicographically greater than the marker are returned in the list of objects. The max-keys query string parameter is an integer that specifies the maximum number of objects you want returned in the list of objects. If a request can return more objects than max-keys allows, the IsTruncated response element contains a True value and the NextMarker response element returns the name of the last object in the list. The returned NextMarker value can then be used as the new marker in another request.

The prefix query string parameter is a string of Unicode characters that restricts the listing to objects whose names begin with the string specified by the prefix. You can use the prefix query string parameter in conjunction with the delimiter query string parameter to create a smaller subset of objects.

The delimiter is a single character or multiple characters and is used to simplify a list of objects that use a directory-like naming scheme. For more information about using a delimiter, see delimiter.

Cloud Storage does not return lists longer than 1,000 objects.

Query string parameters

Parameter	Description	Required
`delimiter`	A character or multiple characters that can be used to simplify a list of objects that use a directory-like naming scheme. Can be used in conjunction with a `prefix`.	No
`generation-marker`	The object generation after which you want to start listing objects. If you use generation-marker, you must also use marker.	No
`marker`	The object name after which you want to start listing objects.	No
`max-keys`	The maximum number of objects to return in a list object request.	No
`prefix`	A string that can be used to limit the number of objects that are returned in a GET Bucket request. Can be used in conjunction with a `delimiter`.	No
`versions`	If specified on a versioned bucket, returns the list of all object versions. If omitted, only lists current versions.	No

Request headers

See common request headers.

Request body elements

This request does not include an XML document in the request body.

Request syntax

The following syntax applies to GET Bucket requests that use either no parameters, or one or more of the delimiter, generation- marker, marker, max-keys, prefix, and versions query string parameters.

GET /?prefix=a_prefix&marker=a_marker&max-keys=max_number_of_keys&delimiter=a_delimiter HTTP/1.1
Host: <bucket>.storage.googleapis.com
Date: <date>
Content-Length: <request body length>
Authorization: <authentication string>

Response headers

The request can return a variety of response headers depending on the request headers you use.

Response body elements

The following response body elements are applicable only if you use either no parameters, or one or more of the delimiter, generation-marker, marker, max-keys, prefix, or versions query string parameters to list objects in a bucket.

Element	Description
`ListBucketResult`	Container for the object information you are requesting.
`Name`	The bucket name.
`CommonPrefixes`	Container for prefixes that satisfy your `prefix` and `delimiter` constraints. This container is used only if you specify a `delimiter` and a `prefix` in the request.
`Delimiter`	The `delimiter` that you specified in the request.
`MaxKeys`	The `max-keys` that you specified in the request.
`Prefix`	The `prefix` that you specified in the request.
`GenerationMarker`	The `generation-marker` that you specified in the request.
`NextGenerationMarker`	If the list of returned objects is incomplete and `versions` parameter was used, `NextGenerationMarker` provides the generation of the last object that was returned. If the list is already complete, `NextGenerationMarker` is not returned.
`Marker`	The `marker` that you specified in the request.
`NextMarker`	`NextMarker` provides the name of the last object that was returned. The value of `NextMarker` can be provided in the `marker` query string parameter in a future GET Bucket call to continue listing the Bucket after this set of results. If there are no more objects in the Bucket that follow the last object in the list, `NextMarker` is not returned.
`IsTruncated`	Indicates whether or not all of the objects in a bucket appear on the list. If `max-keys` is less than the number of objects in a bucket, this element is True.
`Contents`	Container for object information if `versions` query parameter is not used.
`Version`	Container for object information if `versions` query parameter is used.
`Key`	The name of an object.
`Generation`	The generation of the object.
`MetaGeneration`	Generation of the metadata of the object.
`IsLatest`	If `versions` query parameter specified, this is set to true if the object is currently live. Live meaning that if this object is requested without generation, this object is returned.
`LastModified`	The date and time that the object metadata was last modified.
`DeletedTime`	If `versions` query parameter was specified, contains the date and time that an object was overwritten or deleted for non-current objects (if the bucket has versioning enabled).
`ETag`	An HTTP 1.1 entity tag for the object.
`Size`	Size of the object in bytes.
`KmsKeyName`	The name of the KMS key used to encrypt the object. This element is only present if the object is encrypted with Customer-Managed Encryption Keys.

Examples

The following sample lists the objects in a bucket named travel-maps.

Request

GET / HTTP/1.1
Host: travel-maps.storage.googleapis.com
Date: Wed, 17 Feb 2010 15:31:56 GMT
Content-Length: 0
Content-Type: text/plain
Authorization: Bearer ya29.AHES6ZRVmB7fkLtd1XTmq6mo0S1wqZZi3-Lh_s-6Uw7p8vtgSwg

Response

HTTP/1.1 200 OK
 Content-Length: 4061
 Content-Type: application/xml
 Date: Wed, 17 Feb 2010 23:31:57 GMT
 Expires: Wed, 17 Feb 2010 23:31:57 GMT

<?xml version='1.0' encoding='utf-8'?>
<ListBucketResult xmlns='http://doc.s3.amazonaws.com/2006-03-01'>
  <Name>travel-maps</Name>
  <Prefix></Prefix>
  <Marker></Marker>
  <IsTruncated>false</IsTruncated>
  <Contents>
    <Key>europe/france/cannes.pdf</Key>
    <Generation>1360887759327000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T22:11:12.487Z</LastModified>
    <ETag>"53fc311c15eda0a031809982ccf92aac"</ETag>
    <Size>5061631</Size>
  </Contents>
  <Contents>
    <Key>europe/france/paris.pdf</Key>
    <Generation>1360887759329000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T22:09:57.457Z</LastModified>
    <ETag>"53fc311c15eda0a031809982ccf92aac"</ETag>
    <Size>5061631</Size>
  </Contents>
</ListBucketResult>

The following sample lists the objects in travel-maps, but it restricts the list to 25 objects that begin with the letter "t" and come after "test".

Request

GET /?prefix=t&marker=test&max-keys=25 HTTP/1.1
Host: travel-maps.storage.googleapis.com
Date: Mon, 16 Feb 2010 22:58:38 GMT
Content-Length: 0
Authorization: Bearer ya29.AHES6ZRVmB7fkLtd1XTmq6mo0S1wqZZi3-Lh_s-6Uw7p8vtgSwg

Response

HTTP/1.1 200 OK
Date: Mon, 15 Feb 2010 12:30:40 GMT
Content-Length: 2705
Content-Type: application/xml

<?xml version='1.0' encoding='utf-8'?>
<ListBucketResult xmlns='http://doc.s3.amazonaws.com/2006-03-01'>
  <Name>travel-maps</Name>
  <Prefix>t</Prefix>
  <Marker>test</Marker>
  <MaxKeys>25</MaxKeys>
  <IsTruncated>false</IsTruncated>
  <Contents>
    <Key>test_a.jpg</Key>
    <Generation>1360887659329000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T03:12:55.561Z</LastModified>
    <ETag>"2281880ef78388266ecd7d4c1b472a0e"</ETag>
    <Size>328</Size>
  </Contents>
  <Contents>
    <Key>test_b.jpg</Key>
    <Generation>1360887659323000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T03:12:54.606Z</LastModified>
    <ETag>"2281880ef78388266ecd7d4c1b472a0e"</ETag>
    <Size>328</Size>
  </Contents>
  <Contents>
    <Key>test_c.jpg</Key>
    <LastModified>2010-02-17T03:12:53.734Z</LastModified>
    <ETag>"2281880ef78388266ecd7d4c1b472a0e"</ETag>
    <Size>328</Size>
  </Contents>
</ListBucketResult>

The following example uses a prefix and a delimiter to return a list of objects that are named using a directory-like schema. The prefix and delimiter restrict the list of objects so that only those objects that are in the europe directory are returned. Objects that are in subdirectories of the europe directory are not listed.The sample assumes that the following objects are contained in a bucket named travel- maps:

africa/ghana.jpg
africa/egypt/cairo.jpg
europe/finland.jpg
europe/norway.jpg
europe/france/paris.jpg
europe/italy/rome.jpg
europe/sweden/stockholm.jpg
europe/sweden/stockholm/nordic_museum.jpg

The sample request returns an XML document that lists the following two objects in the Contents element:

europe/finland.jpg
europe/norway.jpg

The following europe subdirectories are listed in the CommonPrefixes element:

europe/france/
europe/italy/
europe/sweden/

Request

GET /travel-maps?delimiter=/&prefix=europe/ HTTP/1.1
Host: storage.googleapis.com
Date: Mon, 16 Feb 2010 22:58:38 GMT
Content-Length: 0
Authorization: Bearer ya29.AHES6ZRVmB7fkLtd1XTmq6mo0S1wqZZi3-Lh_s-6Uw7p8vtgSwg

Response

HTTP/1.1 200 OK
Date: Mon, 15 Feb 2010 12:30:40 GMT
Content-Length: 1200
Content-Type: application/xml

<?xml version="1.0"?>
<ListBucketResult xmlns='http://doc.s3.amazonaws.com/2006-03-01'>
  <Name>mybucket</Name>
  <Prefix>europe/</Prefix>
  <Marker />
  <IsTruncated>false</IsTruncated>
  <Contents>
    <Key>europe/finland.jpg</Key>
    <Generation>1360887659323000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T03:12:55.561Z</LastModified>
    <ETag>"781e5e245d69b566979b86e28d23f2c7"</ETag>
    <Size>10</Size>
  </Contents>
  <Contents>
    <Key>europe/norway.jpg</Key>
    <Generation>1360887659323000</Generation>
    <MetaGeneration>1</MetaGeneration>
    <LastModified>2010-02-17T03:12:55.561Z</LastModified>
    <ETag>"781e5e245d69b566979b86e28d23f2c7"</ETag>
    <Size>10</Size>
  </Contents>
  <CommonPrefixes>
    <Prefix>europe/france/</Prefix>
  </CommonPrefixes>
  <CommonPrefixes>
    <Prefix>europe/italy/</Prefix>
  </CommonPrefixes>
  <CommonPrefixes>
    <Prefix>europe/sweden/</Prefix>
  </CommonPrefixes>
</ListBucketResult>

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上次更新日期：九月 18, 2019

List objects

Query string parameters

Request headers

Request body elements

Request syntax

Response headers

Response body elements

Examples

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