The HEAD action retrieves metadata from an object without returning the object itself. This action is useful if you're only interested in an object's metadata. To use HEAD, you must have READ access to the object.
See https://www.paws-r-sdk.com/docs/s3_head_object/ for full documentation.
s3_head_object(
Bucket,
IfMatch = NULL,
IfModifiedSince = NULL,
IfNoneMatch = NULL,
IfUnmodifiedSince = NULL,
Key,
Range = NULL,
VersionId = NULL,
SSECustomerAlgorithm = NULL,
SSECustomerKey = NULL,
SSECustomerKeyMD5 = NULL,
RequestPayer = NULL,
PartNumber = NULL,
ExpectedBucketOwner = NULL,
ChecksumMode = NULL
)[required] The name of the bucket containing the object.
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.
Return the object only if its entity tag (ETag) is the same as the one specified; otherwise, return a 412 (precondition failed) error.
Return the object only if it has been modified since the specified time; otherwise, return a 304 (not modified) error.
Return the object only if its entity tag (ETag) is different from the one specified; otherwise, return a 304 (not modified) error.
Return the object only if it has not been modified since the specified time; otherwise, return a 412 (precondition failed) error.
[required] The object key.
HeadObject returns only the metadata for an object. If the Range is
satisfiable, only the ContentLength is affected in the response. If
the Range is not satisfiable, S3 returns a
416 - Requested Range Not Satisfiable error.
VersionId used to reference a specific version of the object.
Specifies the algorithm to use to when encrypting the object (for example, AES256).
Specifies the customer-provided encryption key for Amazon S3 to use in
encrypting data. This value is used to store the object and then it is
discarded; Amazon S3 does not store the encryption key. The key must be
appropriate for use with the algorithm specified in the
x-amz-server-side-encryption-customer-algorithm header.
Specifies the 128-bit MD5 digest of the encryption key according to RFC 1321. Amazon S3 uses this header for a message integrity check to ensure that the encryption key was transmitted without error.
Part number of the object being read. This is a positive integer between 1 and 10,000. Effectively performs a 'ranged' HEAD request for the part specified. Useful querying about the size of the part and the number of parts in this object.
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).
To retrieve the checksum, this parameter must be enabled.
In addition, if you enable ChecksumMode and the object is encrypted
with Amazon Web Services Key Management Service (Amazon Web Services
KMS), you must have permission to use the kms:Decrypt action for the
request to succeed.