com.amazonaws.services.s3.model

Class GetObjectMetadataRequest

java.lang.Object

com.amazonaws.AmazonWebServiceRequest

com.amazonaws.services.s3.model.GetObjectMetadataRequest

All Implemented Interfaces:

HandlerContextAware, ReadLimitInfo, ExpectedBucketOwnerRequest, SSECustomerKeyProvider, Serializable, Cloneable

public class GetObjectMetadataRequest
extends AmazonWebServiceRequest
implements SSECustomerKeyProvider, Serializable, ExpectedBucketOwnerRequest

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.

A HEAD request has the same options as a GET action on an object. The response is identical to the GET response except that there is no response body. Because of this, if the HEAD request generates an error, it returns a generic 404 Not Found or 403 Forbidden code. It is not possible to retrieve the exact exception beyond these error codes.

If you encrypt an object by using server-side encryption with customer-provided encryption keys (SSE-C) when you store the object in Amazon S3, then when you retrieve the metadata from the object, you must use the following headers:

• x-amz-server-side-encryption-customer-algorithm

• x-amz-server-side-encryption-customer-key

• x-amz-server-side-encryption-customer-key-MD5

For more information about SSE-C, see Server-Side Encryption (Using Customer-Provided Encryption Keys).

• Encryption request headers, like x-amz-server-side-encryption, should not be sent for GET requests if your object uses server-side encryption with CMKs stored in Amazon Web Services KMS (SSE-KMS) or server-side encryption with Amazon S3–managed encryption keys (SSE-S3). If your object does use these types of keys, you’ll get an HTTP 400 BadRequest error.

• The last modified property in this case is the creation date of the object.

Request headers are limited to 8 KB in size. For more information, see Common Request Headers.

Consider the following when using request headers:

• Consideration 1 – 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.

• Consideration 2 – 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.

Permissions

< p>You need the relevant read object (or version) permission for this operation. For more information, see Specifying Permissions in a Policy. If the object you request does not exist, the error Amazon S3 returns depends on whether you also have the s3:ListBucket permission.

• If you have the s3:ListBucket permission on the bucket, Amazon S3 returns an HTTP status code 404 (\"no such key\") error.

• If you don’t have the s3:ListBucket permission, Amazon S3 returns an HTTP status code 403 (\"access denied\") error.

The following action is related to HeadObject:

• GetObject

See Also:

GetObjectMetadataRequest(String, String), GetObjectMetadataRequest(String, String, String), GetObjectRequest, Serialized Form

Field Summary

Fields inherited from class com.amazonaws.AmazonWebServiceRequest

NOOP

Constructor Summary

Constructors

Constructor and Description
GetObjectMetadataRequest(String bucketName, String key) Constructs a new GetObjectMetadataRequest used to retrieve a specified object's metadata.
GetObjectMetadataRequest(String bucketName, String key, String versionId) Constructs a new GetObjectMetadataRequest with basic options.

Method Summary

Modifier and Type	Method and Description
String	getBucketName() The name of the bucket containing the object.
String	getExpectedBucketOwner() Returns he account id of the expected bucket owner.
String	getKey() Gets the key of the object whose metadata is being retrieved.
Integer	getPartNumber() Returns the optional part number that indicates a part in multipart object.
SSECustomerKey	getSSECustomerKey() Returns the optional customer-provided server-side encryption key to use to encrypt the uploaded object.
String	getVersionId() Gets the optional version ID of the object version whose metadata is being retrieved.
boolean	isRequesterPays() Returns true if the user has enabled Requester Pays option when downloading the object metadata from Requester Pays Bucket; else false.
void	setBucketName(String bucketName) Sets the name of the bucket containing the object whose metadata is being retrieved.
void	setExpectedBucketOwner(String expectedBucketOwner) Set the account id of the expected bucket owner.
void	setKey(String key) Sets the key of the object whose metadata is being retrieved.
void	setPartNumber(Integer partNumber) Sets the optional part number to find the number of parts of an object.
void	setRequesterPays(boolean isRequesterPays) Used for downloading an Amazon S3 Object metadata from a Requester Pays Bucket.
void	setSSECustomerKey(SSECustomerKey sseKey) Sets the optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object.
void	setVersionId(String versionId) Sets the optional version ID of the object version whose metadata is being retrieved.
GetObjectMetadataRequest	withBucketName(String bucketName) The name of the bucket containing the object.
GetObjectMetadataRequest	withExpectedBucketOwner(String expectedBucketOwner) Set the account id of the expected bucket owner.
GetObjectMetadataRequest	withKey(String key) Sets the key of the object whose metadata is being retrieved.
GetObjectMetadataRequest	withPartNumber(Integer partNumber) Sets the optional part number to find the number of parts of an object.
GetObjectMetadataRequest	withRequesterPays(boolean isRequesterPays) Used for conducting this operation from a Requester Pays Bucket.
GetObjectMetadataRequest	withSSECustomerKey(SSECustomerKey sseKey) Sets the optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object, and retuns the updated request object so that additional method calls can be chained together.
GetObjectMetadataRequest	withVersionId(String versionId) Sets the optional version ID of the object version whose metadata is being retrieved.

Methods inherited from class com.amazonaws.AmazonWebServiceRequest

addHandlerContext, clone, getCloneRoot, getCloneSource, getCustomQueryParameters, getCustomRequestHeaders, getGeneralProgressListener, getHandlerContext, getReadLimit, getRequestClientOptions, getRequestCredentials, getRequestCredentialsProvider, getRequestMetricCollector, getSdkClientExecutionTimeout, getSdkRequestTimeout, putCustomQueryParameter, putCustomRequestHeader, setGeneralProgressListener, setRequestCredentials, setRequestCredentialsProvider, setRequestMetricCollector, setSdkClientExecutionTimeout, setSdkRequestTimeout, withGeneralProgressListener, withRequestCredentialsProvider, withRequestMetricCollector, withSdkClientExecutionTimeout, withSdkRequestTimeout

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GetObjectMetadataRequest

public GetObjectMetadataRequest(String bucketName,
                                String key)

Constructs a new GetObjectMetadataRequest used to retrieve a specified object's metadata.

Parameters:

bucketName - The name of the bucket containing the object whose metadata is being retrieved.

key - The key of the object whose metadata is being retrieved.

See Also:

GetObjectMetadataRequest(String bucketName, String key, String versionId)

GetObjectMetadataRequest

public GetObjectMetadataRequest(String bucketName,
                                String key,
                                String versionId)

Constructs a new GetObjectMetadataRequest with basic options.

Parameters:

bucketName - The name of the bucket containing the object whose metadata is being retrieved.

key - The key of the object whose metadata is being retrieved.

versionId - The version ID of the object version whose metadata is being retrieved.

See Also:

GetObjectMetadataRequest(String bucketName, String key)

Method Detail

getExpectedBucketOwner

public String getExpectedBucketOwner()

Description copied from interface: ExpectedBucketOwnerRequest

Returns he account id of the expected bucket owner. If the bucket is owned by a different account, the request will fail with an HTTP 403 (Access Denied) error.

Specified by:

getExpectedBucketOwner in interface ExpectedBucketOwnerRequest

withExpectedBucketOwner

public GetObjectMetadataRequest withExpectedBucketOwner(String expectedBucketOwner)

Description copied from interface: ExpectedBucketOwnerRequest

Set the account id of the expected bucket owner. If the bucket is owned by a different account, the request will fail with an HTTP 403 (Access Denied) error.

Specified by:

withExpectedBucketOwner in interface ExpectedBucketOwnerRequest

setExpectedBucketOwner

public void setExpectedBucketOwner(String expectedBucketOwner)

Description copied from interface: ExpectedBucketOwnerRequest

Set the account id of the expected bucket owner. If the bucket is owned by a different account, the request will fail with an HTTP 403 (Access Denied) error.

Specified by:

setExpectedBucketOwner in interface ExpectedBucketOwnerRequest

getBucketName

public String getBucketName()

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 using 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.

Returns:

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 using 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.

See Also:

setBucketName(String bucketName), withBucketName(String)

setBucketName

public void setBucketName(String bucketName)

Sets the name of the bucket containing the object whose metadata is being retrieved.

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 using 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.

Parameters:

bucketName - The name of the bucket, or access point ARN, containing the object's whose metadata is being retrieved.

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 using 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.

See Also:

getBucketName(), withBucketName(String)

withBucketName

public GetObjectMetadataRequest withBucketName(String bucketName)

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 using 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.

Parameters:

bucketName - 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 using 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.

Returns:

This GetObjectMetadataRequest, enabling additional method calls to be chained together.

See Also:

getBucketName(), setBucketName(String bucketName)

getKey

public String getKey()

Gets the key of the object whose metadata is being retrieved.

Returns:

The key of the object whose metadata is being retrieved.

See Also:

setKey(String), withKey(String)

setKey

public void setKey(String key)

Sets the key of the object whose metadata is being retrieved.

Parameters:

key - The key of the object whose metadata is being retrieved.

See Also:

getKey(), withKey(String)

withKey

public GetObjectMetadataRequest withKey(String key)

Sets the key of the object whose metadata is being retrieved. Returns this GetObjectMetadataRequest, enabling additional method calls to be chained together.

Parameters:

key - The key of the object whose metadata is being retrieved.

Returns:

This GetObjectMetadataRequest, enabling additional method calls to be chained together.

See Also:

getKey(), setKey(String)

getVersionId

public String getVersionId()

Gets the optional version ID of the object version whose metadata is being retrieved. If not specified, the latest version will be used.

Returns:

The optional version ID of the object version whose metadata is being retrieved. If not specified, the latest version will be used.

See Also:

setVersionId(String), withVersionId(String)

setVersionId

public void setVersionId(String versionId)

Sets the optional version ID of the object version whose metadata is being retrieved. If not specified, the latest version will be used.

Parameters:

versionId - The optional version ID of the object version whose metadata is being retrieved. If not specified, the latest version will be used.

See Also:

getVersionId(), withVersionId(String)

withVersionId

public GetObjectMetadataRequest withVersionId(String versionId)

Sets the optional version ID of the object version whose metadata is being retrieved. Returns this GetObjectMetadataRequest, enabling additional method calls to be chained together. If not specified, the latest version will be used.

Parameters:

versionId - The optional version ID of the object version whose metadata is being retrieved.

Returns:

This GetObjectMetadataRequest, enabling additional method calls to be chained together.

See Also:

getVersionId(), setVersionId(String)

isRequesterPays

public boolean isRequesterPays()

Returns true if the user has enabled Requester Pays option when downloading the object metadata from Requester Pays Bucket; else false.

If a bucket is enabled for Requester Pays, then any attempt to read an object from it without Requester Pays enabled will result in a 403 error and the bucket owner will be charged for the request.

Enabling Requester Pays disables the ability to have anonymous access to this bucket

Returns:

true if the user has enabled Requester Pays option for downloading the object metadata from Requester Pays Bucket.

setRequesterPays

public void setRequesterPays(boolean isRequesterPays)

Used for downloading an Amazon S3 Object metadata from a Requester Pays Bucket. If set the requester is charged for downloading the data from the bucket.

If a bucket is enabled for Requester Pays, then any attempt to read an object metadata from it without Requester Pays enabled will result in a 403 error and the bucket owner will be charged for the request.

Enabling Requester Pays disables the ability to have anonymous access to this bucket

Parameters:

isRequesterPays - Enable Requester Pays option for the operation.

withRequesterPays

public GetObjectMetadataRequest withRequesterPays(boolean isRequesterPays)

Used for conducting this operation from a Requester Pays Bucket. If set the requester is charged for requests from the bucket. It returns this updated GetObjectMetadataRequest object so that additional method calls can be chained together.

If a bucket is enabled for Requester Pays, then any attempt to upload or download an object from it without Requester Pays enabled will result in a 403 error and the bucket owner will be charged for the request.

Enabling Requester Pays disables the ability to have anonymous access to this bucket.

Parameters:

isRequesterPays - Enable Requester Pays option for the operation.

Returns:

The updated GetObjectMetadataRequest object.

getSSECustomerKey

public SSECustomerKey getSSECustomerKey()

Description copied from interface: SSECustomerKeyProvider

Returns the optional customer-provided server-side encryption key to use to encrypt the uploaded object.

Specified by:

getSSECustomerKey in interface SSECustomerKeyProvider

Returns:

The optional customer-provided server-side encryption key to use to encrypt the uploaded object.

setSSECustomerKey

public void setSSECustomerKey(SSECustomerKey sseKey)

Sets the optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object.

Parameters:

sseKey - The optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object.

withSSECustomerKey

public GetObjectMetadataRequest withSSECustomerKey(SSECustomerKey sseKey)

Sets the optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object, and retuns the updated request object so that additional method calls can be chained together.

Parameters:

sseKey - The optional customer-provided server-side encryption key to use when retrieving the metadata of a server-side encrypted object.

Returns:

This updated request object so that additional method calls can be chained together.

getPartNumber

public Integer getPartNumber()

Returns the optional part number that indicates a part in multipart object.

Returns:

The part number representing a part in a multipart object.

See Also:

setPartNumber(Integer), withPartNumber(Integer)

setPartNumber

public void setPartNumber(Integer partNumber)

Sets the optional part number to find the number of parts of an object.

To find the number of parts of an object, set partNumber to 1 and observe the x-amz-mp-parts-count response. If the object exists and x-amz-mp-parts-count is missing it's implicitly 1. Otherwise number of parts is equal to the value returned by x-amz-mp-parts-count.

The valid range for part number is 1 - 10000 inclusive. For partNumber < 1, an AmazonS3Exception is thrown with response code 400 bad request For partNumber larger than actual part count, an AmazonS3Exception is thrown with response code 416 Request Range Not Satisfiable

Parameters:

partNumber - The part number representing a part in a multipart object.

See Also:

getPartNumber(), withPartNumber(Integer)

withPartNumber

public GetObjectMetadataRequest withPartNumber(Integer partNumber)

Sets the optional part number to find the number of parts of an object.

To find the number of parts of an object, set partNumber to 1 and observe the x-amz-mp-parts-count response. If the object exists and x-amz-mp-parts-count is missing it's implicitly 1. Otherwise number of parts is equal to the value returned by x-amz-mp-parts-count.

The valid range for part number is 1 - 10000 inclusive. For partNumber < 1, an AmazonS3Exception is thrown with response code 400 bad request For partNumber larger than actual part count, an AmazonS3Exception is thrown with response code 416 Request Range Not Satisfiable

Parameters:

partNumber - The part number representing a part in a multipart object.

Returns:

This GetObjectRequest, enabling additional method calls to be chained together.

See Also:

getPartNumber(), setPartNumber(Integer)