Bucket / Action / put_object

put_object#

S3.Bucket.put_object(**kwargs)#

Adds an object to a bucket. You must have WRITE permissions on a bucket to add an object to it.

Note

Amazon S3 never adds partial objects; if you receive a success response, Amazon S3 added the entire object to the bucket. You cannot use PutObject to only update a single piece of metadata for an existing object. You must put the entire object with updated metadata if you want to update some values.

Amazon S3 is a distributed system. If it receives multiple write requests for the same object simultaneously, it overwrites all but the last object written. To prevent objects from being deleted or overwritten, you can use Amazon S3 Object Lock.

To ensure that data is not corrupted traversing the network, use the Content-MD5 header. When you use this header, Amazon S3 checks the object against the provided MD5 value and, if they do not match, returns an error. Additionally, you can calculate the MD5 while putting an object to Amazon S3 and compare the returned ETag to the calculated MD5 value.

Note

To successfully complete the PutObject request, you must have the s3:PutObject in your IAM permissions.
To successfully change the objects acl of your PutObject request, you must have the s3:PutObjectAcl in your IAM permissions.
To successfully set the tag-set with your PutObject request, you must have the s3:PutObjectTagging in your IAM permissions.
The Content-MD5 header is required for any request to upload an object with a retention period configured using Amazon S3 Object Lock. For more information about Amazon S3 Object Lock, see Amazon S3 Object Lock Overview in the Amazon S3 User Guide.

You have three mutually exclusive options to protect data using server-side encryption in Amazon S3, depending on how you choose to manage the encryption keys. Specifically, the encryption key options are Amazon S3 managed keys (SSE-S3), Amazon Web Services KMS keys (SSE-KMS), and customer-provided keys (SSE-C). Amazon S3 encrypts data with server-side encryption by using Amazon S3 managed keys (SSE-S3) by default. You can optionally tell Amazon S3 to encrypt data at by rest using server-side encryption with other key options. For more information, see Using Server-Side Encryption.

When adding a new object, you can use headers to grant ACL-based permissions to individual Amazon Web Services accounts or to predefined groups defined by Amazon S3. These permissions are then added to the ACL on the object. By default, all objects are private. Only the owner has full access control. For more information, see Access Control List (ACL) Overview and Managing ACLs Using the REST API.

If the bucket that you’re uploading objects to uses the bucket owner enforced setting for S3 Object Ownership, ACLs are disabled and no longer affect permissions. Buckets that use this setting only accept PUT requests that don’t specify an ACL or PUT requests that specify bucket owner full control ACLs, such as the bucket-owner-full-control canned ACL or an equivalent form of this ACL expressed in the XML format. PUT requests that contain other ACLs (for example, custom grants to certain Amazon Web Services accounts) fail and return a 400 error with the error code AccessControlListNotSupported. For more information, see Controlling ownership of objects and disabling ACLs in the Amazon S3 User Guide.

Note

If your bucket uses the bucket owner enforced setting for Object Ownership, all objects written to the bucket by any account will be owned by the bucket owner.

By default, Amazon S3 uses the STANDARD Storage Class to store newly created objects. The STANDARD storage class provides high durability and high availability. Depending on performance needs, you can specify a different Storage Class. Amazon S3 on Outposts only uses the OUTPOSTS Storage Class. For more information, see Storage Classes in the Amazon S3 User Guide.

If you enable versioning for a bucket, Amazon S3 automatically generates a unique version ID for the object being stored. Amazon S3 returns this ID in the response. When you enable versioning for a bucket, if Amazon S3 receives multiple write requests for the same object simultaneously, it stores all of the objects. For more information about versioning, see Adding Objects to Versioning Enabled Buckets. For information about returning the versioning state of a bucket, see GetBucketVersioning.

For more information about related Amazon S3 APIs, see the following:

See also: AWS API Documentation

Request Syntax

object = bucket.put_object(
    ACL='private'|'public-read'|'public-read-write'|'authenticated-read'|'aws-exec-read'|'bucket-owner-read'|'bucket-owner-full-control',
    Body=b'bytes'|file,
    CacheControl='string',
    ContentDisposition='string',
    ContentEncoding='string',
    ContentLanguage='string',
    ContentLength=123,
    ContentMD5='string',
    ContentType='string',
    ChecksumAlgorithm='CRC32'|'CRC32C'|'SHA1'|'SHA256',
    ChecksumCRC32='string',
    ChecksumCRC32C='string',
    ChecksumSHA1='string',
    ChecksumSHA256='string',
    Expires=datetime(2015, 1, 1),
    GrantFullControl='string',
    GrantRead='string',
    GrantReadACP='string',
    GrantWriteACP='string',
    Key='string',
    Metadata={
        'string': 'string'
    },
    ServerSideEncryption='AES256'|'aws:kms',
    StorageClass='STANDARD'|'REDUCED_REDUNDANCY'|'STANDARD_IA'|'ONEZONE_IA'|'INTELLIGENT_TIERING'|'GLACIER'|'DEEP_ARCHIVE'|'OUTPOSTS'|'GLACIER_IR',
    WebsiteRedirectLocation='string',
    SSECustomerAlgorithm='string',
    SSECustomerKey='string',
    SSEKMSKeyId='string',
    SSEKMSEncryptionContext='string',
    BucketKeyEnabled=True|False,
    RequestPayer='requester',
    Tagging='string',
    ObjectLockMode='GOVERNANCE'|'COMPLIANCE',
    ObjectLockRetainUntilDate=datetime(2015, 1, 1),
    ObjectLockLegalHoldStatus='ON'|'OFF',
    ExpectedBucketOwner='string'
)

Parameters:

ACL (string) –
The canned ACL to apply to the object. For more information, see Canned ACL.

This action is not supported by Amazon S3 on Outposts.
Body (bytes or seekable file-like object) – Object data.
CacheControl (string) – Can be used to specify caching behavior along the request/reply chain. For more information, see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.
ContentDisposition (string) – Specifies presentational information for the object. For more information, see https://www.rfc-editor.org/rfc/rfc6266#section-4.
ContentEncoding (string) – Specifies what content encodings have been applied to the object and thus what decoding mechanisms must be applied to obtain the media-type referenced by the Content-Type header field. For more information, see https://www.rfc-editor.org/rfc/rfc9110.html#field.content-encoding.
ContentLanguage (string) – The language the content is in.
ContentLength (integer) – Size of the body in bytes. This parameter is useful when the size of the body cannot be determined automatically. For more information, see https://www.rfc-editor.org/rfc/rfc9110.html#name-content-length.
ContentMD5 (string) – The base64-encoded 128-bit MD5 digest of the message (without the headers) according to RFC 1864. This header can be used as a message integrity check to verify that the data is the same data that was originally sent. Although it is optional, we recommend using the Content-MD5 mechanism as an end-to-end integrity check. For more information about REST request authentication, see REST Authentication.
ContentType (string) – A standard MIME type describing the format of the contents. For more information, see https://www.rfc-editor.org/rfc/rfc9110.html#name-content-type.
ChecksumAlgorithm (string) –
Indicates the algorithm used to create the checksum for the object when using the SDK. This header will not provide any additional functionality if not using the SDK. When sending this header, there must be a corresponding x-amz-checksum or x-amz-trailer header sent. Otherwise, Amazon S3 fails the request with the HTTP status code 400 Bad Request. For more information, see Checking object integrity in the Amazon S3 User Guide.

If you provide an individual checksum, Amazon S3 ignores any provided ChecksumAlgorithm parameter.
ChecksumCRC32 (string) – This header can be used as a data integrity check to verify that the data received is the same data that was originally sent. This header specifies the base64-encoded, 32-bit CRC32 checksum of the object. For more information, see Checking object integrity in the Amazon S3 User Guide.
ChecksumCRC32C (string) – This header can be used as a data integrity check to verify that the data received is the same data that was originally sent. This header specifies the base64-encoded, 32-bit CRC32C checksum of the object. For more information, see Checking object integrity in the Amazon S3 User Guide.
ChecksumSHA1 (string) – This header can be used as a data integrity check to verify that the data received is the same data that was originally sent. This header specifies the base64-encoded, 160-bit SHA-1 digest of the object. For more information, see Checking object integrity in the Amazon S3 User Guide.
ChecksumSHA256 (string) – This header can be used as a data integrity check to verify that the data received is the same data that was originally sent. This header specifies the base64-encoded, 256-bit SHA-256 digest of the object. For more information, see Checking object integrity in the Amazon S3 User Guide.
Expires (datetime) – The date and time at which the object is no longer cacheable. For more information, see https://www.rfc-editor.org/rfc/rfc7234#section-5.3.
GrantFullControl (string) –
Gives the grantee READ, READ_ACP, and WRITE_ACP permissions on the object.

This action is not supported by Amazon S3 on Outposts.
GrantRead (string) –
Allows grantee to read the object data and its metadata.

This action is not supported by Amazon S3 on Outposts.
GrantReadACP (string) –
Allows grantee to read the object ACL.

This action is not supported by Amazon S3 on Outposts.
GrantWriteACP (string) –
Allows grantee to write the ACL for the applicable object.

This action is not supported by Amazon S3 on Outposts.
Key (string) –
[REQUIRED]

Object key for which the PUT action was initiated.
Metadata (dict) –
A map of metadata to store with the object in S3.
- (string) –
  - (string) –
ServerSideEncryption (string) – The server-side encryption algorithm used when storing this object in Amazon S3 (for example, AES256, aws:kms).
StorageClass (string) – By default, Amazon S3 uses the STANDARD Storage Class to store newly created objects. The STANDARD storage class provides high durability and high availability. Depending on performance needs, you can specify a different Storage Class. Amazon S3 on Outposts only uses the OUTPOSTS Storage Class. For more information, see Storage Classes in the Amazon S3 User Guide.
WebsiteRedirectLocation (string) –
If the bucket is configured as a website, redirects requests for this object to another object in the same bucket or to an external URL. Amazon S3 stores the value of this header in the object metadata. For information about object metadata, see Object Key and Metadata.

In the following example, the request header sets the redirect to an object (anotherPage.html) in the same bucket:

x-amz-website-redirect-location: /anotherPage.html

In the following example, the request header sets the object redirect to another website:

x-amz-website-redirect-location: http://www.example.com/

For more information about website hosting in Amazon S3, see Hosting Websites on Amazon S3 and How to Configure Website Page Redirects.
SSECustomerAlgorithm (string) – Specifies the algorithm to use to when encrypting the object (for example, AES256).
SSECustomerKey (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.
SSECustomerKeyMD5 (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.

Please note that this parameter is automatically populated if it is not provided. Including this parameter is not required
SSEKMSKeyId (string) – If x-amz-server-side-encryption has a valid value of aws:kms, this header specifies the ID of the Amazon Web Services Key Management Service (Amazon Web Services KMS) symmetric encryption customer managed key that was used for the object. If you specify x-amz-server-side-encryption:aws:kms, but do not provide `` x-amz-server-side-encryption-aws-kms-key-id``, Amazon S3 uses the Amazon Web Services managed key to protect the data. If the KMS key does not exist in the same account issuing the command, you must use the full ARN and not just the ID.
SSEKMSEncryptionContext (string) – Specifies the Amazon Web Services KMS Encryption Context to use for object encryption. The value of this header is a base64-encoded UTF-8 string holding JSON with the encryption context key-value pairs. This value is stored as object metadata and automatically gets passed on to Amazon Web Services KMS for future GetObject or CopyObject operations on this object.
BucketKeyEnabled (boolean) –
Specifies whether Amazon S3 should use an S3 Bucket Key for object encryption with server-side encryption using AWS KMS (SSE-KMS). Setting this header to true causes Amazon S3 to use an S3 Bucket Key for object encryption with SSE-KMS.

Specifying this header with a PUT action doesn’t affect bucket-level settings for S3 Bucket Key.
RequestPayer (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.
Tagging (string) – The tag-set for the object. The tag-set must be encoded as URL Query parameters. (For example, “Key1=Value1”)
ObjectLockMode (string) – The Object Lock mode that you want to apply to this object.
ObjectLockRetainUntilDate (datetime) – The date and time when you want this object’s Object Lock to expire. Must be formatted as a timestamp parameter.
ObjectLockLegalHoldStatus (string) – Specifies whether a legal hold will be applied to this object. For more information about S3 Object Lock, see Object Lock.
ExpectedBucketOwner (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).

Return type:

s3.Object

Returns:

Object resource