Struct HeadObjectInput

#[non_exhaustive]
pub struct HeadObjectInput {

    pub bucket: Option<String>,
    pub if_match: Option<String>,
    pub if_modified_since: Option<DateTime>,
    pub if_none_match: Option<String>,
    pub if_unmodified_since: Option<DateTime>,
    pub key: Option<String>,
    pub range: Option<String>,
    pub response_cache_control: Option<String>,
    pub response_content_disposition: Option<String>,
    pub response_content_encoding: Option<String>,
    pub response_content_language: Option<String>,
    pub response_content_type: Option<String>,
    pub response_expires: Option<DateTime>,
    pub version_id: Option<String>,
    pub sse_customer_algorithm: Option<String>,
    pub sse_customer_key: Option<String>,
    pub sse_customer_key_md5: Option<String>,
    pub request_payer: Option<RequestPayer>,
    pub part_number: Option<i32>,
    pub expected_bucket_owner: Option<String>,
    pub checksum_mode: Option<ChecksumMode>,
}

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

bucket: Option<String>

The name of the bucket that contains the object.

Directory buckets - When you use this operation with a directory bucket, you must use virtual-hosted-style requests in the format Bucket_name.s3express-az_id.region.amazonaws.com. Path-style requests are not supported. Directory bucket names must be unique in the chosen Availability Zone. Bucket names must follow the format bucket_base_name--az-id--x-s3 (for example, DOC-EXAMPLE-BUCKET--usw2-az1--x-s3). For information about bucket naming restrictions, see Directory bucket naming rules in the Amazon S3 User Guide.

Access points - When you use this action with an access point, you must provide the alias of the access point in place of the bucket name or specify the access point ARN. When using the access point ARN, 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.

Access points and Object Lambda access points are not supported by directory buckets.

S3 on Outposts - 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.

if_match: Option<String>

Return the object only if its entity tag (ETag) is the same as the one specified; otherwise, return a 412 (precondition failed) error.

If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:

• If-Match condition evaluates to true, and;

• If-Unmodified-Since condition evaluates to false;

Then Amazon S3 returns 200 OK and the data requested.

For more information about conditional requests, see RFC 7232.

if_modified_since: Option<DateTime>

Return the object only if it has been modified since the specified time; otherwise, return a 304 (not modified) error.

If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:

• If-None-Match condition evaluates to false, and;

• If-Modified-Since condition evaluates to true;

Then Amazon S3 returns the 304 Not Modified response code.

For more information about conditional requests, see RFC 7232.

if_none_match: Option<String>

Return the object only if its entity tag (ETag) is different from the one specified; otherwise, return a 304 (not modified) error.

If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:

• If-None-Match condition evaluates to false, and;

• If-Modified-Since condition evaluates to true;

Then Amazon S3 returns the 304 Not Modified response code.

For more information about conditional requests, see RFC 7232.

if_unmodified_since: Option<DateTime>

Return the object only if it has not been modified since the specified time; otherwise, return a 412 (precondition failed) error.

If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:

• If-Match condition evaluates to true, and;

• If-Unmodified-Since condition evaluates to false;

Then Amazon S3 returns 200 OK and the data requested.

For more information about conditional requests, see RFC 7232.

key: Option<String>

The object key.

range: Option<String>

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.

response_cache_control: Option<String>

Sets the Cache-Control header of the response.

response_content_disposition: Option<String>

Sets the Content-Disposition header of the response.

response_content_encoding: Option<String>

Sets the Content-Encoding header of the response.

response_content_language: Option<String>

Sets the Content-Language header of the response.

response_content_type: Option<String>

Sets the Content-Type header of the response.

response_expires: Option<DateTime>

Sets the Expires header of the response.

version_id: Option<String>

Version ID used to reference a specific version of the object.

For directory buckets in this API operation, only the null value of the version ID is supported.

sse_customer_algorithm: Option<String>

Specifies the algorithm to use when encrypting the object (for example, AES256).

This functionality is not supported for directory buckets.

sse_customer_key: Option<String>

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.

This functionality is not supported for directory buckets.

sse_customer_key_md5: Option<String>

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.

This functionality is not supported for directory buckets.

request_payer: Option<RequestPayer>

Confirms that the requester knows that they will be charged for the request. Bucket owners need not specify this parameter in their requests. If either the source or destination S3 bucket has Requester Pays enabled, the requester will pay for corresponding charges to copy the object. For information about downloading objects from Requester Pays buckets, see Downloading Objects in Requester Pays Buckets in the Amazon S3 User Guide.

This functionality is not supported for directory buckets.

part_number: Option<i32>

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.

expected_bucket_owner: Option<String>

The account ID of the expected bucket owner. If the account ID that you provide does not match the actual owner of the bucket, the request fails with the HTTP status code 403 Forbidden (access denied).

checksum_mode: Option<ChecksumMode>

To retrieve the checksum, this parameter must be enabled.

General purpose buckets - If you enable checksum mode and the object is uploaded with a checksum and encrypted with an Key Management Service (KMS) key, you must have permission to use the kms:Decrypt action to retrieve the checksum.

Directory buckets - If you enable ChecksumMode and the object is encrypted with Amazon Web Services Key Management Service (Amazon Web Services KMS), you must also have the kms:GenerateDataKey and kms:Decrypt permissions in IAM identity-based policies and KMS key policies for the KMS key to retrieve the checksum of the object.

Implementations

impl HeadObjectInput

pub fn bucket(&self) -> Option<&str>

The name of the bucket that contains the object.

Directory buckets - When you use this operation with a directory bucket, you must use virtual-hosted-style requests in the format Bucket_name.s3express-az_id.region.amazonaws.com. Path-style requests are not supported. Directory bucket names must be unique in the chosen Availability Zone. Bucket names must follow the format bucket_base_name--az-id--x-s3 (for example, DOC-EXAMPLE-BUCKET--usw2-az1--x-s3). For information about bucket naming restrictions, see Directory bucket naming rules in the Amazon S3 User Guide.

Access points - When you use this action with an access point, you must provide the alias of the access point in place of the bucket name or specify the access point ARN. When using the access point ARN, 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.

Access points and Object Lambda access points are not supported by directory buckets.

S3 on Outposts - 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.

pub fn if_match(&self) -> Option<&str>

Return the object only if its entity tag (ETag) is the same as the one specified; otherwise, return a 412 (precondition failed) error.

If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:

• If-Match condition evaluates to true, and;

• If-Unmodified-Since condition evaluates to false;

Then Amazon S3 returns 200 OK and the data requested.

For more information about conditional requests, see RFC 7232.

pub fn if_modified_since(&self) -> Option<&DateTime>

Return the object only if it has been modified since the specified time; otherwise, return a 304 (not modified) error.

If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:

• If-None-Match condition evaluates to false, and;

• If-Modified-Since condition evaluates to true;

Then Amazon S3 returns the 304 Not Modified response code.

For more information about conditional requests, see RFC 7232.

pub fn if_none_match(&self) -> Option<&str>

Return the object only if its entity tag (ETag) is different from the one specified; otherwise, return a 304 (not modified) error.

If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:

• If-None-Match condition evaluates to false, and;

• If-Modified-Since condition evaluates to true;

Then Amazon S3 returns the 304 Not Modified response code.

For more information about conditional requests, see RFC 7232.

pub fn if_unmodified_since(&self) -> Option<&DateTime>

Return the object only if it has not been modified since the specified time; otherwise, return a 412 (precondition failed) error.

If both of the If-Match and If-Unmodified-Since headers are present in the request as follows:

• If-Match condition evaluates to true, and;

• If-Unmodified-Since condition evaluates to false;

Then Amazon S3 returns 200 OK and the data requested.

For more information about conditional requests, see RFC 7232.

pub fn key(&self) -> Option<&str>

The object key.

pub fn range(&self) -> Option<&str>

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.

pub fn response_cache_control(&self) -> Option<&str>

Sets the Cache-Control header of the response.

pub fn response_content_disposition(&self) -> Option<&str>

Sets the Content-Disposition header of the response.

pub fn response_content_encoding(&self) -> Option<&str>

Sets the Content-Encoding header of the response.

pub fn response_content_language(&self) -> Option<&str>

Sets the Content-Language header of the response.

pub fn response_content_type(&self) -> Option<&str>

Sets the Content-Type header of the response.

pub fn response_expires(&self) -> Option<&DateTime>

Sets the Expires header of the response.

pub fn version_id(&self) -> Option<&str>

Version ID used to reference a specific version of the object.

For directory buckets in this API operation, only the null value of the version ID is supported.

pub fn sse_customer_algorithm(&self) -> Option<&str>

Specifies the algorithm to use when encrypting the object (for example, AES256).

This functionality is not supported for directory buckets.

pub fn sse_customer_key(&self) -> Option<&str>

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.

This functionality is not supported for directory buckets.

pub fn sse_customer_key_md5(&self) -> Option<&str>

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.

This functionality is not supported for directory buckets.

pub fn request_payer(&self) -> Option<&RequestPayer>

Confirms that the requester knows that they will be charged for the request. Bucket owners need not specify this parameter in their requests. If either the source or destination S3 bucket has Requester Pays enabled, the requester will pay for corresponding charges to copy the object. For information about downloading objects from Requester Pays buckets, see Downloading Objects in Requester Pays Buckets in the Amazon S3 User Guide.

This functionality is not supported for directory buckets.

pub fn part_number(&self) -> Option<i32>

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.

pub fn expected_bucket_owner(&self) -> Option<&str>

The account ID of the expected bucket owner. If the account ID that you provide does not match the actual owner of the bucket, the request fails with the HTTP status code 403 Forbidden (access denied).

pub fn checksum_mode(&self) -> Option<&ChecksumMode>

To retrieve the checksum, this parameter must be enabled.

General purpose buckets - If you enable checksum mode and the object is uploaded with a checksum and encrypted with an Key Management Service (KMS) key, you must have permission to use the kms:Decrypt action to retrieve the checksum.

Directory buckets - If you enable ChecksumMode and the object is encrypted with Amazon Web Services Key Management Service (Amazon Web Services KMS), you must also have the kms:GenerateDataKey and kms:Decrypt permissions in IAM identity-based policies and KMS key policies for the KMS key to retrieve the checksum of the object.

impl HeadObjectInput

pub fn builder() -> HeadObjectInputBuilder

Creates a new builder-style object to manufacture HeadObjectInput.

Trait Implementations

impl Clone for HeadObjectInput

fn clone(&self) -> HeadObjectInput

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HeadObjectInput

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for HeadObjectInput

fn eq(&self, other: &HeadObjectInput) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for HeadObjectInput