2023/06/28 - Amazon Simple Storage Service - 3 updated api methods
Changes The S3 LISTObjects, ListObjectsV2 and ListObjectVersions API now supports a new optional header x-amz-optional-object-attributes. If header contains RestoreStatus as the value, then S3 will include Glacier restore status i.e. isRestoreInProgress and RestoreExpiryDate in List response.
{'OptionalObjectAttributes': ['RestoreStatus']}
Response {'Versions': {'RestoreStatus': {'IsRestoreInProgress': 'boolean',
'RestoreExpiryDate': 'timestamp'}}}
Returns metadata about all versions of the objects in a bucket. You can also use request parameters as selection criteria to return metadata about a subset of all the object versions.
Warning
To use this operation, you must have permission to perform the s3:ListBucketVersions action. Be aware of the name difference.
Note
A 200 OK response can contain valid or invalid XML. Make sure to design your application to parse the contents of the response and handle it appropriately.
To use this operation, you must have READ access to the bucket.
This action is not supported by Amazon S3 on Outposts.
The following operations are related to ListObjectVersions :
See also: AWS API Documentation
Request Syntax
client.list_object_versions(
Bucket='string',
Delimiter='string',
EncodingType='url',
KeyMarker='string',
MaxKeys=123,
Prefix='string',
VersionIdMarker='string',
ExpectedBucketOwner='string',
RequestPayer='requester',
OptionalObjectAttributes=[
'RestoreStatus',
]
)
string
[REQUIRED]
The bucket name that contains the objects.
string
A delimiter is a character that you specify to group keys. All keys that contain the same string between the prefix and the first occurrence of the delimiter are grouped under a single result element in CommonPrefixes . These groups are counted as one result against the max-keys limitation. These keys are not returned elsewhere in the response.
string
Requests Amazon S3 to encode the object keys in the response and specifies the encoding method to use. An object key can contain any Unicode character; however, the 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 Amazon S3 encode the keys in the response.
string
Specifies the key to start with when listing objects in a bucket.
integer
Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more. If additional keys satisfy the search criteria, but were not returned because max-keys was exceeded, the response contains <isTruncated>true</isTruncated> . To return the additional keys, see key-marker and version-id-marker .
string
Use this parameter to select only those keys that begin with the specified prefix. You can use prefixes to separate a bucket into different groupings of keys. (You can think of using prefix to make groups in the same way that you'd use a folder in a file system.) You can use prefix with delimiter to roll up numerous objects into a single result under CommonPrefixes .
string
Specifies the object version you want to start listing from.
string
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).
string
Confirms that the requester knows that they will be charged for the request. Bucket owners need not specify this parameter in their requests. For information about downloading objects from Requester Pays buckets, see Downloading Objects in Requester Pays Buckets in the Amazon S3 User Guide .
list
Specifies the optional fields that you want returned in the response. Fields that you do not specify are not returned.
(string) --
dict
Response Syntax
{
'IsTruncated': True|False,
'KeyMarker': 'string',
'VersionIdMarker': 'string',
'NextKeyMarker': 'string',
'NextVersionIdMarker': 'string',
'Versions': [
{
'ETag': 'string',
'ChecksumAlgorithm': [
'CRC32'|'CRC32C'|'SHA1'|'SHA256',
],
'Size': 123,
'StorageClass': 'STANDARD',
'Key': 'string',
'VersionId': 'string',
'IsLatest': True|False,
'LastModified': datetime(2015, 1, 1),
'Owner': {
'DisplayName': 'string',
'ID': 'string'
},
'RestoreStatus': {
'IsRestoreInProgress': True|False,
'RestoreExpiryDate': datetime(2015, 1, 1)
}
},
],
'DeleteMarkers': [
{
'Owner': {
'DisplayName': 'string',
'ID': 'string'
},
'Key': 'string',
'VersionId': 'string',
'IsLatest': True|False,
'LastModified': datetime(2015, 1, 1)
},
],
'Name': 'string',
'Prefix': 'string',
'Delimiter': 'string',
'MaxKeys': 123,
'CommonPrefixes': [
{
'Prefix': 'string'
},
],
'EncodingType': 'url',
'RequestCharged': 'requester'
}
Response Structure
(dict) --
IsTruncated (boolean) --
A flag that indicates whether Amazon S3 returned all of the results that satisfied the search criteria. If your results were truncated, you can make a follow-up paginated request by using the NextKeyMarker and NextVersionIdMarker response parameters as a starting place in another request to return the rest of the results.
KeyMarker (string) --
Marks the last key returned in a truncated response.
VersionIdMarker (string) --
Marks the last version of the key returned in a truncated response.
NextKeyMarker (string) --
When the number of responses exceeds the value of MaxKeys , NextKeyMarker specifies the first key not returned that satisfies the search criteria. Use this value for the key-marker request parameter in a subsequent request.
NextVersionIdMarker (string) --
When the number of responses exceeds the value of MaxKeys , NextVersionIdMarker specifies the first object version not returned that satisfies the search criteria. Use this value for the version-id-marker request parameter in a subsequent request.
Versions (list) --
Container for version information.
(dict) --
The version of an object.
ETag (string) --
The entity tag is an MD5 hash of that version of the object.
ChecksumAlgorithm (list) --
The algorithm that was used to create a checksum of the object.
(string) --
Size (integer) --
Size in bytes of the object.
StorageClass (string) --
The class of storage used to store the object.
Key (string) --
The object key.
VersionId (string) --
Version ID of an object.
IsLatest (boolean) --
Specifies whether the object is (true) or is not (false) the latest version of an object.
LastModified (datetime) --
Date and time the object was last modified.
Owner (dict) --
Specifies the owner of the object.
DisplayName (string) --
Container for the display name of the owner. This value is only supported in the following Amazon Web Services Regions:
US East (N. Virginia)
US West (N. California)
US West (Oregon)
Asia Pacific (Singapore)
Asia Pacific (Sydney)
Asia Pacific (Tokyo)
Europe (Ireland)
South America (São Paulo)
ID (string) --
Container for the ID of the owner.
RestoreStatus (dict) --
Specifies the restoration status of an object. Objects in certain storage classes must be restored before they can be retrieved. For more information about these storage classes and how to work with archived objects, see Working with archived objects in the Amazon S3 User Guide .
IsRestoreInProgress (boolean) --
Specifies whether the object is currently being restored. If the object restoration is in progress, the header returns the value TRUE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="true"
If the object restoration has completed, the header returns the value FALSE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
If the object hasn't been restored, there is no header response.
RestoreExpiryDate (datetime) --
Indicates when the restored copy will expire. This value is populated only if the object has already been restored. For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
DeleteMarkers (list) --
Container for an object that is a delete marker.
(dict) --
Information about the delete marker.
Owner (dict) --
The account that created the delete marker.>
DisplayName (string) --
Container for the display name of the owner. This value is only supported in the following Amazon Web Services Regions:
US East (N. Virginia)
US West (N. California)
US West (Oregon)
Asia Pacific (Singapore)
Asia Pacific (Sydney)
Asia Pacific (Tokyo)
Europe (Ireland)
South America (São Paulo)
ID (string) --
Container for the ID of the owner.
Key (string) --
The object key.
VersionId (string) --
Version ID of an object.
IsLatest (boolean) --
Specifies whether the object is (true) or is not (false) the latest version of an object.
LastModified (datetime) --
Date and time the object was last modified.
Name (string) --
The bucket name.
Prefix (string) --
Selects objects that start with the value supplied by this parameter.
Delimiter (string) --
The delimiter grouping the included keys. A delimiter is a character that you specify to group keys. All keys that contain the same string between the prefix and the first occurrence of the delimiter are grouped under a single result element in CommonPrefixes . These groups are counted as one result against the max-keys limitation. These keys are not returned elsewhere in the response.
MaxKeys (integer) --
Specifies the maximum number of objects to return.
CommonPrefixes (list) --
All of the keys rolled up into a common prefix count as a single return when calculating the number of returns.
(dict) --
Container for all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter. CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix. For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/.
Prefix (string) --
Container for the specified common prefix.
EncodingType (string) --
Encoding type used by Amazon S3 to encode object key names in the XML response.
If you specify the encoding-type request parameter, Amazon S3 includes this element in the response, and returns encoded key name values in the following response elements:
KeyMarker, NextKeyMarker, Prefix, Key , and Delimiter .
RequestCharged (string) --
If present, indicates that the requester was successfully charged for the request.
{'OptionalObjectAttributes': ['RestoreStatus']}
Response {'Contents': {'RestoreStatus': {'IsRestoreInProgress': 'boolean',
'RestoreExpiryDate': 'timestamp'}}}
Returns some or all (up to 1,000) of the objects in a bucket. You can use the request parameters as selection criteria to return a subset of the objects in a bucket. A 200 OK response can contain valid or invalid XML. Be sure to design your application to parse the contents of the response and handle it appropriately.
Warning
This action has been revised. We recommend that you use the newer version, ListObjectsV2 , when developing applications. For backward compatibility, Amazon S3 continues to support ListObjects .
The following operations are related to ListObjects :
See also: AWS API Documentation
Request Syntax
client.list_objects(
Bucket='string',
Delimiter='string',
EncodingType='url',
Marker='string',
MaxKeys=123,
Prefix='string',
RequestPayer='requester',
ExpectedBucketOwner='string',
OptionalObjectAttributes=[
'RestoreStatus',
]
)
string
[REQUIRED]
The name of the bucket containing the objects.
When using this action with an access point, you must direct requests to the access point hostname. The access point hostname takes the form AccessPointName -AccountId .s3-accesspoint.*Region* .amazonaws.com. When using this action with an access point through the Amazon Web Services SDKs, you provide the access point ARN in place of the bucket name. For more information about access point ARNs, see Using access points in the Amazon S3 User Guide .
When you use this action with Amazon S3 on Outposts, you must direct requests to the S3 on Outposts hostname. The S3 on Outposts hostname takes the form `` AccessPointName -AccountId .*outpostID* .s3-outposts.*Region* .amazonaws.com`` . When you use this action with S3 on Outposts through the Amazon Web Services SDKs, you provide the Outposts access point ARN in place of the bucket name. For more information about S3 on Outposts ARNs, see What is S3 on Outposts? in the Amazon S3 User Guide .
string
A delimiter is a character that you use to group keys.
string
Requests Amazon S3 to encode the object keys in the response and specifies the encoding method to use. An object key can contain any Unicode character; however, the 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 Amazon S3 encode the keys in the response.
string
Marker is where you want Amazon S3 to start listing from. Amazon S3 starts listing after this specified key. Marker can be any key in the bucket.
integer
Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more.
string
Limits the response to keys that begin with the specified prefix.
string
Confirms that the requester knows that she or he will be charged for the list objects request. Bucket owners need not specify this parameter in their requests.
string
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).
list
Specifies the optional fields that you want returned in the response. Fields that you do not specify are not returned.
(string) --
dict
Response Syntax
{
'IsTruncated': True|False,
'Marker': 'string',
'NextMarker': 'string',
'Contents': [
{
'Key': 'string',
'LastModified': datetime(2015, 1, 1),
'ETag': 'string',
'ChecksumAlgorithm': [
'CRC32'|'CRC32C'|'SHA1'|'SHA256',
],
'Size': 123,
'StorageClass': 'STANDARD'|'REDUCED_REDUNDANCY'|'GLACIER'|'STANDARD_IA'|'ONEZONE_IA'|'INTELLIGENT_TIERING'|'DEEP_ARCHIVE'|'OUTPOSTS'|'GLACIER_IR'|'SNOW',
'Owner': {
'DisplayName': 'string',
'ID': 'string'
},
'RestoreStatus': {
'IsRestoreInProgress': True|False,
'RestoreExpiryDate': datetime(2015, 1, 1)
}
},
],
'Name': 'string',
'Prefix': 'string',
'Delimiter': 'string',
'MaxKeys': 123,
'CommonPrefixes': [
{
'Prefix': 'string'
},
],
'EncodingType': 'url',
'RequestCharged': 'requester'
}
Response Structure
(dict) --
IsTruncated (boolean) --
A flag that indicates whether Amazon S3 returned all of the results that satisfied the search criteria.
Marker (string) --
Indicates where in the bucket listing begins. Marker is included in the response if it was sent with the request.
NextMarker (string) --
When the response is truncated (the IsTruncated element value in the response is true ), you can use the key name in this field as the marker parameter in the subsequent request to get the next set of objects. Amazon S3 lists objects in alphabetical order.
Note
This element is returned only if you have the delimiter request parameter specified. If the response does not include the NextMarker element and it is truncated, you can use the value of the last Key element in the response as the marker parameter in the subsequent request to get the next set of object keys.
Contents (list) --
Metadata about each object returned.
(dict) --
An object consists of data and its descriptive metadata.
Key (string) --
The name that you assign to an object. You use the object key to retrieve the object.
LastModified (datetime) --
Creation date of the object.
ETag (string) --
The entity tag is a hash of the object. The ETag reflects changes only to the contents of an object, not its metadata. The ETag may or may not be an MD5 digest of the object data. Whether or not it is depends on how the object was created and how it is encrypted as described below:
Objects created by the PUT Object, POST Object, or Copy operation, or through the Amazon Web Services Management Console, and are encrypted by SSE-S3 or plaintext, have ETags that are an MD5 digest of their object data.
Objects created by the PUT Object, POST Object, or Copy operation, or through the Amazon Web Services Management Console, and are encrypted by SSE-C or SSE-KMS, have ETags that are not an MD5 digest of their object data.
If an object is created by either the Multipart Upload or Part Copy operation, the ETag is not an MD5 digest, regardless of the method of encryption. If an object is larger than 16 MB, the Amazon Web Services Management Console will upload or copy that object as a Multipart Upload, and therefore the ETag will not be an MD5 digest.
ChecksumAlgorithm (list) --
The algorithm that was used to create a checksum of the object.
(string) --
Size (integer) --
Size in bytes of the object
StorageClass (string) --
The class of storage used to store the object.
Owner (dict) --
The owner of the object
DisplayName (string) --
Container for the display name of the owner. This value is only supported in the following Amazon Web Services Regions:
US East (N. Virginia)
US West (N. California)
US West (Oregon)
Asia Pacific (Singapore)
Asia Pacific (Sydney)
Asia Pacific (Tokyo)
Europe (Ireland)
South America (São Paulo)
ID (string) --
Container for the ID of the owner.
RestoreStatus (dict) --
Specifies the restoration status of an object. Objects in certain storage classes must be restored before they can be retrieved. For more information about these storage classes and how to work with archived objects, see Working with archived objects in the Amazon S3 User Guide .
IsRestoreInProgress (boolean) --
Specifies whether the object is currently being restored. If the object restoration is in progress, the header returns the value TRUE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="true"
If the object restoration has completed, the header returns the value FALSE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
If the object hasn't been restored, there is no header response.
RestoreExpiryDate (datetime) --
Indicates when the restored copy will expire. This value is populated only if the object has already been restored. For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
Name (string) --
The bucket name.
Prefix (string) --
Keys that begin with the indicated prefix.
Delimiter (string) --
Causes keys that contain the same string between the prefix and the first occurrence of the delimiter to be rolled up into a single result element in the CommonPrefixes collection. These rolled-up keys are not returned elsewhere in the response. Each rolled-up result counts as only one return against the MaxKeys value.
MaxKeys (integer) --
The maximum number of keys returned in the response body.
CommonPrefixes (list) --
All of the keys (up to 1,000) rolled up in a common prefix count as a single return when calculating the number of returns.
A response can contain CommonPrefixes only if you specify a delimiter.
CommonPrefixes contains all (if there are any) keys between Prefix and the next occurrence of the string specified by the delimiter.
CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix .
For example, if the prefix is notes/ and the delimiter is a slash (/ ), as in notes/summer/july , the common prefix is notes/summer/ . All of the keys that roll up into a common prefix count as a single return when calculating the number of returns.
(dict) --
Container for all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter. CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix. For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/.
Prefix (string) --
Container for the specified common prefix.
EncodingType (string) --
Encoding type used by Amazon S3 to encode object keys in the response.
RequestCharged (string) --
If present, indicates that the requester was successfully charged for the request.
{'OptionalObjectAttributes': ['RestoreStatus']}
Response {'Contents': {'RestoreStatus': {'IsRestoreInProgress': 'boolean',
'RestoreExpiryDate': 'timestamp'}}}
Returns some or all (up to 1,000) of the objects in a bucket with each request. You can use the request parameters as selection criteria to return a subset of the objects in a bucket. A 200 OK response can contain valid or invalid XML. Make sure to design your application to parse the contents of the response and handle it appropriately. Objects are returned sorted in an ascending order of the respective key names in the list. For more information about listing objects, see Listing object keys programmatically in the Amazon S3 User Guide .
To use this operation, you must have READ access to the bucket.
To use this action in an Identity and Access Management (IAM) policy, you must have permission to perform the s3:ListBucket action. The bucket owner has this permission by default and can grant this permission to others. For more information about permissions, see Permissions Related to Bucket Subresource Operations and Managing Access Permissions to Your Amazon S3 Resources in the Amazon S3 User Guide .
Warning
This section describes the latest revision of this action. We recommend that you use this revised API operation for application development. For backward compatibility, Amazon S3 continues to support the prior version of this API operation, ListObjects .
To get a list of your buckets, see ListBuckets .
The following operations are related to ListObjectsV2 :
See also: AWS API Documentation
Request Syntax
client.list_objects_v2(
Bucket='string',
Delimiter='string',
EncodingType='url',
MaxKeys=123,
Prefix='string',
ContinuationToken='string',
FetchOwner=True|False,
StartAfter='string',
RequestPayer='requester',
ExpectedBucketOwner='string',
OptionalObjectAttributes=[
'RestoreStatus',
]
)
string
[REQUIRED]
Bucket name to list.
When using this action with an access point, you must direct requests to the access point hostname. The access point hostname takes the form AccessPointName -AccountId .s3-accesspoint.*Region* .amazonaws.com. When using this action with an access point through the Amazon Web Services SDKs, you provide the access point ARN in place of the bucket name. For more information about access point ARNs, see Using access points in the Amazon S3 User Guide .
When you use this action with Amazon S3 on Outposts, you must direct requests to the S3 on Outposts hostname. The S3 on Outposts hostname takes the form `` AccessPointName -AccountId .*outpostID* .s3-outposts.*Region* .amazonaws.com`` . When you use this action with S3 on Outposts through the Amazon Web Services SDKs, you provide the Outposts access point ARN in place of the bucket name. For more information about S3 on Outposts ARNs, see What is S3 on Outposts? in the Amazon S3 User Guide .
string
A delimiter is a character that you use to group keys.
string
Encoding type used by Amazon S3 to encode object keys in the response.
integer
Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more.
string
Limits the response to keys that begin with the specified prefix.
string
ContinuationToken indicates to Amazon S3 that the list is being continued on this bucket with a token. ContinuationToken is obfuscated and is not a real key.
boolean
The owner field is not present in ListObjectsV2 by default. If you want to return the owner field with each key in the result, then set the FetchOwner field to true .
string
StartAfter is where you want Amazon S3 to start listing from. Amazon S3 starts listing after this specified key. StartAfter can be any key in the bucket.
string
Confirms that the requester knows that she or he will be charged for the list objects request in V2 style. Bucket owners need not specify this parameter in their requests.
string
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).
list
Specifies the optional fields that you want returned in the response. Fields that you do not specify are not returned.
(string) --
dict
Response Syntax
{
'IsTruncated': True|False,
'Contents': [
{
'Key': 'string',
'LastModified': datetime(2015, 1, 1),
'ETag': 'string',
'ChecksumAlgorithm': [
'CRC32'|'CRC32C'|'SHA1'|'SHA256',
],
'Size': 123,
'StorageClass': 'STANDARD'|'REDUCED_REDUNDANCY'|'GLACIER'|'STANDARD_IA'|'ONEZONE_IA'|'INTELLIGENT_TIERING'|'DEEP_ARCHIVE'|'OUTPOSTS'|'GLACIER_IR'|'SNOW',
'Owner': {
'DisplayName': 'string',
'ID': 'string'
},
'RestoreStatus': {
'IsRestoreInProgress': True|False,
'RestoreExpiryDate': datetime(2015, 1, 1)
}
},
],
'Name': 'string',
'Prefix': 'string',
'Delimiter': 'string',
'MaxKeys': 123,
'CommonPrefixes': [
{
'Prefix': 'string'
},
],
'EncodingType': 'url',
'KeyCount': 123,
'ContinuationToken': 'string',
'NextContinuationToken': 'string',
'StartAfter': 'string',
'RequestCharged': 'requester'
}
Response Structure
(dict) --
IsTruncated (boolean) --
Set to false if all of the results were returned. Set to true if more keys are available to return. If the number of results exceeds that specified by MaxKeys , all of the results might not be returned.
Contents (list) --
Metadata about each object returned.
(dict) --
An object consists of data and its descriptive metadata.
Key (string) --
The name that you assign to an object. You use the object key to retrieve the object.
LastModified (datetime) --
Creation date of the object.
ETag (string) --
The entity tag is a hash of the object. The ETag reflects changes only to the contents of an object, not its metadata. The ETag may or may not be an MD5 digest of the object data. Whether or not it is depends on how the object was created and how it is encrypted as described below:
Objects created by the PUT Object, POST Object, or Copy operation, or through the Amazon Web Services Management Console, and are encrypted by SSE-S3 or plaintext, have ETags that are an MD5 digest of their object data.
Objects created by the PUT Object, POST Object, or Copy operation, or through the Amazon Web Services Management Console, and are encrypted by SSE-C or SSE-KMS, have ETags that are not an MD5 digest of their object data.
If an object is created by either the Multipart Upload or Part Copy operation, the ETag is not an MD5 digest, regardless of the method of encryption. If an object is larger than 16 MB, the Amazon Web Services Management Console will upload or copy that object as a Multipart Upload, and therefore the ETag will not be an MD5 digest.
ChecksumAlgorithm (list) --
The algorithm that was used to create a checksum of the object.
(string) --
Size (integer) --
Size in bytes of the object
StorageClass (string) --
The class of storage used to store the object.
Owner (dict) --
The owner of the object
DisplayName (string) --
Container for the display name of the owner. This value is only supported in the following Amazon Web Services Regions:
US East (N. Virginia)
US West (N. California)
US West (Oregon)
Asia Pacific (Singapore)
Asia Pacific (Sydney)
Asia Pacific (Tokyo)
Europe (Ireland)
South America (São Paulo)
ID (string) --
Container for the ID of the owner.
RestoreStatus (dict) --
Specifies the restoration status of an object. Objects in certain storage classes must be restored before they can be retrieved. For more information about these storage classes and how to work with archived objects, see Working with archived objects in the Amazon S3 User Guide .
IsRestoreInProgress (boolean) --
Specifies whether the object is currently being restored. If the object restoration is in progress, the header returns the value TRUE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="true"
If the object restoration has completed, the header returns the value FALSE . For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
If the object hasn't been restored, there is no header response.
RestoreExpiryDate (datetime) --
Indicates when the restored copy will expire. This value is populated only if the object has already been restored. For example:
x-amz-optional-object-attributes: IsRestoreInProgress="false", RestoreExpiryDate="2012-12-21T00:00:00.000Z"
Name (string) --
The bucket name.
When using this action with an access point, you must direct requests to the access point hostname. The access point hostname takes the form AccessPointName -AccountId .s3-accesspoint.*Region* .amazonaws.com. When using this action with an access point through the Amazon Web Services SDKs, you provide the access point ARN in place of the bucket name. For more information about access point ARNs, see Using access points in the Amazon S3 User Guide .
When you use this action with Amazon S3 on Outposts, you must direct requests to the S3 on Outposts hostname. The S3 on Outposts hostname takes the form `` AccessPointName -AccountId .*outpostID* .s3-outposts.*Region* .amazonaws.com`` . When you use this action with S3 on Outposts through the Amazon Web Services SDKs, you provide the Outposts access point ARN in place of the bucket name. For more information about S3 on Outposts ARNs, see What is S3 on Outposts? in the Amazon S3 User Guide .
Prefix (string) --
Keys that begin with the indicated prefix.
Delimiter (string) --
Causes keys that contain the same string between the prefix and the first occurrence of the delimiter to be rolled up into a single result element in the CommonPrefixes collection. These rolled-up keys are not returned elsewhere in the response. Each rolled-up result counts as only one return against the MaxKeys value.
MaxKeys (integer) --
Sets the maximum number of keys returned in the response. By default, the action returns up to 1,000 key names. The response might contain fewer keys but will never contain more.
CommonPrefixes (list) --
All of the keys (up to 1,000) rolled up into a common prefix count as a single return when calculating the number of returns.
A response can contain CommonPrefixes only if you specify a delimiter.
CommonPrefixes contains all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter.
CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix .
For example, if the prefix is notes/ and the delimiter is a slash (/ ) as in notes/summer/july , the common prefix is notes/summer/ . All of the keys that roll up into a common prefix count as a single return when calculating the number of returns.
(dict) --
Container for all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter. CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix. For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/.
Prefix (string) --
Container for the specified common prefix.
EncodingType (string) --
Encoding type used by Amazon S3 to encode object key names in the XML response.
If you specify the encoding-type request parameter, Amazon S3 includes this element in the response, and returns encoded key name values in the following response elements:
Delimiter, Prefix, Key, and StartAfter .
KeyCount (integer) --
KeyCount is the number of keys returned with this request. KeyCount will always be less than or equal to the MaxKeys field. For example, if you ask for 50 keys, your result will include 50 keys or fewer.
ContinuationToken (string) --
If ContinuationToken was sent with the request, it is included in the response.
NextContinuationToken (string) --
NextContinuationToken is sent when isTruncated is true, which means there are more keys in the bucket that can be listed. The next list requests to Amazon S3 can be continued with this NextContinuationToken . NextContinuationToken is obfuscated and is not a real key
StartAfter (string) --
If StartAfter was sent with the request, it is included in the response.
RequestCharged (string) --
If present, indicates that the requester was successfully charged for the request.