When setting a bucket policy, the Principal or NotPrincipal value in a policy is invalid, such as being empty or not matching the request protocol format.

Example

You set an empty Principal value in a bucket policy.

PUT /?policy HTTP/1.1​
Host: <Bucket name>.<TOS endpoint>​
Date: Fri, 30 Jul 2021 13:59:18 GMT​
Authorization: authorization xxx​
​
{​
    "Version": "2012-10-17",​
    "Statement": [​
        {​
            "Sid": "1",​
            "Effect": "Allow",​
            "Principal": "",​
            "Action": ["tos:Get*"],​
            "Resource": ["trn:tos:::bucketname/*"]​
        }        ​
    ]​
}​

Solution

Refer to bucket policy templates and parameter descriptions to properly construct the bucket policy and ensure the Principal or NotPrincipal values are valid in a single policy.

Last updated: 2025.10.11 17:59:23

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