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Class: Aws::S3::ObjectVersion

Inherits:
Resources::Resource show all
Defined in:
(unknown)

Instance Attribute Summary collapse

Attributes inherited from Resources::Resource

#client, #identifiers

Instance Method Summary collapse

Methods inherited from Resources::Resource

add_data_attribute, add_identifier, #data, data_attributes, #data_loaded?, identifiers, #load, #wait_until

Methods included from Resources::OperationMethods

#add_batch_operation, #add_operation, #batch_operation, #batch_operation_names, #batch_operations, #operation, #operation_names, #operations

Constructor Details

#initialize(bucket_name, object_key, id, options = {}) ⇒ Object #initialize(options = {}) ⇒ Object

Overloads:

  • #initialize(bucket_name, object_key, id, options = {}) ⇒ Object

    Parameters:

    • bucket_name (String)
    • object_key (String)
    • id (String)

    Options Hash (options):

    • :client (Client)

      When `:client is not given, the options hash is used to construct a new Client object.

  • #initialize(options = {}) ⇒ Object

    Options Hash (options):

    • :bucket_name (required, String)
    • :object_key (required, String)
    • :id (required, String)
    • :client (Client)

      When `:client is not given, the options hash is used to construct a new Client object.

Instance Attribute Details

#bucket_nameString (readonly)

Returns:

  • (String)

#etagString (readonly)

The entity tag is an MD5 hash of that version of the object.

Returns:

  • (String)

    The entity tag is an MD5 hash of that version of the object.

#idString (readonly)

Returns:

  • (String)

#is_latestBoolean (readonly)

Specifies whether the object is (true) or is not (false) the latest version of an object.

Returns:

  • (Boolean)

    Specifies whether the object is (true) or is not (false) the latest version of an object.

#keyString (readonly)

The object key.

Returns:

  • (String)

    The object key.

#last_modifiedTime (readonly)

Date and time the object was last modified.

Returns:

  • (Time)

    Date and time the object was last modified.

#object_keyString (readonly)

Returns:

  • (String)

#ownerTypes::Owner (readonly)

Specifies the owner of the object.

Returns:

#sizeInteger (readonly)

Size in bytes of the object.

Returns:

  • (Integer)

    Size in bytes of the object.

#storage_classString (readonly)

The class of storage used to store the object.

Possible values:

  • STANDARD

Returns:

  • (String)

    The class of storage used to store the object.

#version_idString (readonly)

Version ID of an object.

Returns:

  • (String)

    Version ID of an object.

Instance Method Details

#delete(options = {}) ⇒ Types::DeleteObjectOutput

Removes the null version (if there is one) of an object and inserts a delete marker, which becomes the latest version of the object. If there isn't a null version, Amazon S3 does not remove any objects.

To remove a specific version, you must be the bucket owner and you must use the version Id subresource. Using this subresource permanently deletes the version. If the object deleted is a delete marker, Amazon S3 sets the response header, x-amz-delete-marker, to true.

If the object you want to delete is in a bucket where the bucket versioning configuration is MFA Delete enabled, you must include the x-amz-mfa request header in the DELETE versionId request. Requests that include x-amz-mfa must use HTTPS.

For more information about MFA Delete, see Using MFA Delete. To see sample requests that use versioning, see Sample Request.

You can delete objects by explicitly calling the DELETE Object API or configure its lifecycle (PutBucketLifecycle) to enable Amazon S3 to remove them for you. If you want to block users or accounts from removing or deleting objects from your bucket, you must deny them the s3:DeleteObject, s3:DeleteObjectVersion, and s3:PutLifeCycleConfiguration actions.

The following operation is related to DeleteObject:

Examples:

Request syntax example with placeholder values


objectversion.delete({
  mfa: "MFA",
  request_payer: "requester", # accepts requester
  bypass_governance_retention: false,
  use_accelerate_endpoint: false,
})

Options Hash (options):

  • :mfa (String)

    The concatenation of the authentication device\'s serial number, a space, and the value that is displayed on your authentication device. Required to permanently delete a versioned object if versioning is configured with MFA delete enabled.

  • :request_payer (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 Requestor Pays Buckets in the Amazon S3 Developer Guide.

  • :bypass_governance_retention (Boolean)

    Indicates whether S3 Object Lock should bypass Governance-mode restrictions to process this operation.

  • :use_accelerate_endpoint (Boolean)

    When true, the "https://BUCKETNAME.s3-accelerate.amazonaws.com" endpoint will be used.

Returns:

See Also:

#get(options = {}) ⇒ Types::GetObjectOutput

Retrieves objects from Amazon S3. To use GET, you must have READ access to the object. If you grant READ access to the anonymous user, you can return the object without using an authorization header.

An Amazon S3 bucket has no directory hierarchy such as you would find in a typical computer file system. You can, however, create a logical hierarchy by using object key names that imply a folder structure. For example, instead of naming an object sample.jpg, you can name it photos/2006/February/sample.jpg.

To get an object from such a logical hierarchy, specify the full key name for the object in the GET operation. For a virtual hosted-style request example, if you have the object photos/2006/February/sample.jpg, specify the resource as /photos/2006/February/sample.jpg. For a path-style request example, if you have the object photos/2006/February/sample.jpg in the bucket named examplebucket, specify the resource as /examplebucket/photos/2006/February/sample.jpg. For more information about request types, see HTTP Host Header Bucket Specification.

To distribute large files to many people, you can save bandwidth costs by using BitTorrent. For more information, see Amazon S3 Torrent. For more information about returning the ACL of an object, see GetObjectAcl.

If the object you are retrieving is stored in the GLACIER or DEEP_ARCHIVE storage classes, before you can retrieve the object you must first restore a copy using . Otherwise, this operation returns an InvalidObjectStateError error. For information about restoring archived objects, see Restoring Archived Objects.

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 AWS 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.

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 GET 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).

Assuming you have permission to read object tags (permission for the s3:GetObjectVersionTagging action), the response also returns the x-amz-tagging-count header that provides the count of number of tags associated with the object. You can use GetObjectTagging to retrieve the tag set associated with an object.

Permissions

You need the s3:GetObject 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 will return an HTTP status code 404 ("no such key") error.

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

Versioning

By default, the GET operation returns the current version of an object. To return a different version, use the versionId subresource.

If the current version of the object is a delete marker, Amazon S3 behaves as if the object was deleted and includes x-amz-delete-marker: true in the response.

For more information about versioning, see PutBucketVersioning.

Overriding Response Header Values

There are times when you want to override certain response header values in a GET response. For example, you might override the Content-Disposition response header value in your GET request.

You can override values for a set of response headers using the following query parameters. These response header values are sent only on a successful request, that is, when status code 200 OK is returned. The set of headers you can override using these parameters is a subset of the headers that Amazon S3 accepts when you create an object. The response headers that you can override for the GET response are Content-Type, Content-Language, Expires, Cache-Control, Content-Disposition, and Content-Encoding. To override these header values in the GET response, you use the following request parameters.

You must sign the request, either using an Authorization header or a presigned URL, when using these parameters. They cannot be used with an unsigned (anonymous) request.

  • response-content-type

  • response-content-language

  • response-expires

  • response-cache-control

  • response-content-disposition

  • response-content-encoding

Additional Considerations about Request Headers

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, S3 returns 200 OK and the data requested.

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, S3 returns 304 Not Modified response code.

For more information about conditional requests, see RFC 7232.

The following operations are related to GetObject:

Examples:

Request syntax example with placeholder values


objectversion.get({
  response_target: "/path/to/file", # where to write response data, file path, or IO object
  if_match: "IfMatch",
  if_modified_since: Time.now,
  if_none_match: "IfNoneMatch",
  if_unmodified_since: Time.now,
  range: "Range",
  response_cache_control: "ResponseCacheControl",
  response_content_disposition: "ResponseContentDisposition",
  response_content_encoding: "ResponseContentEncoding",
  response_content_language: "ResponseContentLanguage",
  response_content_type: "ResponseContentType",
  response_expires: Time.now,
  sse_customer_algorithm: "SSECustomerAlgorithm",
  sse_customer_key: "SSECustomerKey",
  sse_customer_key_md5: "SSECustomerKeyMD5",
  request_payer: "requester", # accepts requester
  part_number: 1,
  use_accelerate_endpoint: false,
})

Options Hash (options):

  • :response_target (IO, String)

    Specifies where to stream response data. You can provide the path where a file will be created on disk, or you can provide an IO object. If omitted, the response data will be loaded into memory and written to a StringIO object.

  • :if_match (String)

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

  • :if_modified_since (Time)

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

  • :if_none_match (String)

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

  • :if_unmodified_since (Time)

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

  • :range (String)

    Downloads the specified range bytes of an object. For more information about the HTTP Range header, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.

  • :response_cache_control (String)

    Sets the Cache-Control header of the response.

  • :response_content_disposition (String)

    Sets the Content-Disposition header of the response

  • :response_content_encoding (String)

    Sets the Content-Encoding header of the response.

  • :response_content_language (String)

    Sets the Content-Language header of the response.

  • :response_content_type (String)

    Sets the Content-Type header of the response.

  • :response_expires (Time)

    Sets the Expires header of the response.

  • :sse_customer_algorithm (String)

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

  • :sse_customer_key (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.

  • :sse_customer_key_md5 (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.

  • :request_payer (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 Requestor Pays Buckets in the Amazon S3 Developer Guide.

  • :part_number (Integer)

    Part number of the object being read. This is a positive integer between 1 and 10,000. Effectively performs a \'ranged\' GET request for the part specified. Useful for downloading just a part of an object.

  • :use_accelerate_endpoint (Boolean)

    When true, the "https://BUCKETNAME.s3-accelerate.amazonaws.com" endpoint will be used.

Returns:

See Also:

#head(options = {}) ⇒ Types::HeadObjectOutput

The HEAD operation retrieves metadata from an object without returning the object itself. This operation 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 operation on an object. The response is identical to the GET response except that there is no response body.

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 AWS 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.

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

You need the s3:GetObject 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 operation is related to HeadObject:

Examples:

Request syntax example with placeholder values


objectversion.head({
  if_match: "IfMatch",
  if_modified_since: Time.now,
  if_none_match: "IfNoneMatch",
  if_unmodified_since: Time.now,
  range: "Range",
  sse_customer_algorithm: "SSECustomerAlgorithm",
  sse_customer_key: "SSECustomerKey",
  sse_customer_key_md5: "SSECustomerKeyMD5",
  request_payer: "requester", # accepts requester
  part_number: 1,
  use_accelerate_endpoint: false,
})

Options Hash (options):

  • :if_match (String)

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

  • :if_modified_since (Time)

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

  • :if_none_match (String)

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

  • :if_unmodified_since (Time)

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

  • :range (String)

    Downloads the specified range bytes of an object. For more information about the HTTP Range header, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.

  • :sse_customer_algorithm (String)

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

  • :sse_customer_key (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.

  • :sse_customer_key_md5 (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.

  • :request_payer (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 Requestor Pays Buckets in the Amazon S3 Developer Guide.

  • :part_number (Integer)

    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.

  • :use_accelerate_endpoint (Boolean)

    When true, the "https://BUCKETNAME.s3-accelerate.amazonaws.com" endpoint will be used.

Returns:

See Also:

#objectObject

Returns: