AmazonS3Client.PutBucketPolicy Method (PutBucketPolicyRequest)

Applies an Amazon S3 bucket policy to an Amazon S3 bucket.

Directory buckets - For directory buckets, you must make requests for this API operation to the Regional endpoint. These endpoints support path-style requests in the format https://s3express-control.region_code.amazonaws.com/bucket-name. Virtual-hosted-style requests aren't supported. For more information, see Regional and Zonal endpoints in the Amazon S3 User Guide.

Permissions

If you are using an identity other than the root user of the Amazon Web Services account that owns the bucket, the calling identity must both have the PutBucketPolicy permissions on the specified bucket and belong to the bucket owner's account in order to use this operation.

If you don't have PutBucketPolicy permissions, Amazon S3 returns a

403
            Access Denied

error. If you have the correct permissions, but you're not using an identity that belongs to the bucket owner's account, Amazon S3 returns a

405
            Method Not Allowed

error.

To ensure that bucket owners don't inadvertently lock themselves out of their own buckets, the root principal in a bucket owner's Amazon Web Services account can perform the GetBucketPolicy, PutBucketPolicy, and DeleteBucketPolicy API actions, even if their bucket policy explicitly denies the root principal's access. Bucket owner root principals can only be blocked from performing these API actions by VPC endpoint policies and Amazon Web Services Organizations policies.

General purpose bucket permissions - The s3:PutBucketPolicy permission is required in a policy. For more information about general purpose buckets bucket policies, see Using Bucket Policies and User Policies in the Amazon S3 User Guide.
Directory bucket permissions - To grant access to this API operation, you must have the s3express:PutBucketPolicy permission in an IAM identity-based policy instead of a bucket policy. Cross-account access to this API operation isn't supported. This operation can only be performed by the Amazon Web Services account that owns the resource. For more information about directory bucket policies and permissions, see Amazon Web Services Identity and Access Management (IAM) for S3 Express One Zone in the Amazon S3 User Guide.

Example bucket policies

General purpose buckets example bucket policies - See Bucket policy examples in the Amazon S3 User Guide.

Directory bucket example bucket policies - See Example bucket policies for S3 Express One Zone in the Amazon S3 User Guide.

HTTP Host header syntax

Directory buckets - The HTTP Host header syntax is s3express-control.region.amazonaws.com.

The following operations are related to PutBucketPolicy:

Note:

For .NET Core this operation is only available in asynchronous form. Please refer to PutBucketPolicyAsync.

Namespace: Amazon.S3
Assembly: AWSSDK.S3.dll
Version: 3.x.y.z

Syntax

public virtual PutBucketPolicyResponse PutBucketPolicy(
         PutBucketPolicyRequest request
)

Parameters

request: Type: Amazon.S3.Model.PutBucketPolicyRequest

Container for the necessary parameters to execute the PutBucketPolicy service method.

Return Value

Type: PutBucketPolicyResponse

The response from the PutBucketPolicy service method, as returned by S3.

Examples

This example shows how to Get, Put and Delete bucket policies.

BucketPolicy samples


                // Create a client
                AmazonS3Client client = new AmazonS3Client();

                // Put sample bucket policy (overwrite an existing policy)
                string newPolicy = @"{ 
    ""Statement"":[{ 
    ""Sid"":""BasicPerms"", 
    ""Effect"":""Allow"", 
    ""Principal"": ""*"", 
    ""Action"":[""s3:PutObject"",""s3:GetObject""], 
    ""Resource"":[""arn:aws:s3:::samplebucketname/*""] 
}]}";
                PutBucketPolicyRequest putRequest = new PutBucketPolicyRequest
                {
                    BucketName = "SampleBucket",
                    Policy = newPolicy
                };
                client.PutBucketPolicy(putRequest);


                // Retrieve current policy
                GetBucketPolicyRequest getRequest = new GetBucketPolicyRequest
                {
                    BucketName = "SampleBucket"
                };
                string policy = client.GetBucketPolicy(getRequest).Policy;

                Console.WriteLine(policy);
                Debug.Assert(policy.Contains("BasicPerms"));


                // Delete current policy
                DeleteBucketPolicyRequest deleteRequest = new DeleteBucketPolicyRequest
                {
                    BucketName = "SampleBucket"
                };
                client.DeleteBucketPolicy(deleteRequest);


                // Retrieve current policy and verify that it is null
                policy = client.GetBucketPolicy(getRequest).Policy;
                Debug.Assert(policy == null);

Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

AmazonS3Client.PutBucketPolicy (PutBucketPolicyRequest)