Help Center/ Object Storage Service/ API Reference (ME-Abu Dhabi Region)/ APIs/ Advanced Bucket Settings/ Configuring a Bucket Policy
Updated on 2024-01-02 GMT+08:00
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Configuring a Bucket Policy

Functions

This operation creates or modifies policies for buckets. If the specified bucket already has a policy, the policy in the request will overwrite the existing one. There is no limit on the number of bucket policies (statements) for a bucket. However, the total size of JSON descriptions of all bucket policies in a bucket cannot exceed 20 KB.

To perform this operation, the user must be the bucket owner or the bucket owner's IAM user that has permissions required for configuring bucket policies.

Request Syntax

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PUT /?policy HTTP/1.1   
Host: bucketname.obs.region.example.com
Date: date
Authorization: signatureValue
Policy written in JSON

Request Parameters

This request contains no message parameters.

Request Headers

This request uses common headers. For details, see Table 3.

Request Elements

The request body is a JSON string that contains the bucket policy information.

Response Syntax

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HTTP/1.1 status_code
Date: date
Content-Length: length

Response Headers

The response to the request uses common headers. For details, see Table 1.

Response Elements

This response contains no elements.

Error Responses

No special error responses are returned. For details, see Table 2.

Sample Request 1

Grant permissions to an OBS tenant.

Grant permissions to the tenant whose ID is 783fc6652cf246c096ea836694f71855.

For details about how to obtain the tenant ID, see Obtaining a Domain ID and a User ID.

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PUT /?policy HTTP/1.1
Host: examplebucket.obs.region.example.com
Date: WED, 01 Jul 2015 02:32:25 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:jZiAT8Vx4azWEvPRMWi0X5BpJMA=

{
    "Statement": [
        {
            "Sid": "Stmt1375240018061",
            "Action": [
                "GetBucketLogging"
            ],
            "Effect": "Allow",
            "Resource": "logging.bucket",
            "Principal": {
                "ID": [
                    "domain/783fc6652cf246c096ea836694f71855:user/*"
                ]
            }
        }
    ]
}

Sample Response 1

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HTTP/1.1 204 No Content
x-obs-request-id: 7B6DFC9BC71DD58B061285551605709
x-obs-id-2: N0I2REZDOUJDNzFERDU4QjA2MTI4NTU1MTYwNTcwOUFBQUFBQUFBYmJiYmJiYmJD
Date: WED, 01 Jul 2015 02:32:25 GMT
Content-Length: 0
Server: OBS

Sample Request 2

Grant permissions to an OBS user.

The user ID is 71f3901173514e6988115ea2c26d1999, and the account ID is 783fc6652cf246c096ea836694f71855.

For details about how to obtain the account ID and user ID, see Obtaining a Domain ID and a User ID.

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PUT /?policy HTTP/1.1
Host: examplebucket.obs.region.example.com
Date: WED, 01 Jul 2015 02:33:28 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:jZiAT8Vx4azWEvPRMWi0X5BpJMA=

{
    "Statement": [
        {
            "Sid": "Stmt1375240018062",
            "Action": [
                "PutBucketLogging"
            ],
            "Effect": "Allow",
            "Resource": "examplebucket",
            "Principal": {
                "ID": [
                    "domain/783fc6652cf246c096ea836694f71855:user/71f3901173514e6988115ea2c26d1999"
                ]
            }
        }
    ]
}

Sample Response 2

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HTTP/1.1 204 No Content
x-obs-request-id: 7B6DFC9BC71DD58B061285551605709
x-obs-id-2: N0I2REZDOUJDNzFERDU4QjA2MTI4NTU1MTYwNTcwOUFBQUFBQUFBYmJiYmJiYmJD
Date: WED, 01 Jul 2015 02:33:28 GMT
Content-Length: 0
Server: OBS

Sample Request 3

Deny all users except the specified one all the operation permissions.

The user ID is 71f3901173514e6988115ea2c26d1999, and the account ID is 783fc6652cf246c096ea836694f71855.

For details about how to obtain the account ID and user ID, see Obtaining a Domain ID and a User ID.

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PUT /?policy HTTP/1.1 
Host: examplebucket.obs.region.example.com
Date: WED, 01 Jul 2015 02:34:34 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:jZiAT8Vx4azWEvPRMWi0X5BpJMA=
 
{
    "Statement": [
        {
            "Effect": "Deny", 
            "Action": ["*"], 
            "Resource": [
                "examplebucket/*", 
                "examplebucket"
            ], 
            "NotPrincipal": {
                "ID": [
                    "domain/783fc6652cf246c096ea836694f71855:user/71f3901173514e6988115ea2c26d1999", 
                    "domain/783fc6652cf246c096ea836694f71855"
                ]
            }
        }
     ]
}

Sample Response 3

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HTTP/1.1 204 No Content 
x-obs-request-id: A603000001604A7DFE4A4AF31E301891
x-obs-id-2: BKOvGmTlt6sda5X4G89PuMO4fabObGYmnpRGkaMba1LqPt0fCACEuCMllAObRK1n
Date: WED, 01 Jul 2015 02:34:34 GMT
Content-Length: 0
Server: OBS

Sample Request 4

Request to allow only the specified domain name and external link requests that have no referer headers by using the URL validation whitelist.

URL validation whitelist: http://storage.example.com

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PUT /?policy HTTP/1.1 
Host: examplebucket.obs.region.example.com
Date: WED, 01 Jul 2015 02:34:34 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:jZiAT8Vx4azWEvPRMWi0X5BpJMA=
 
{
	"Statement": [{
		"Effect": "Deny",
		"Action": [
		"GetObject",
		"GetObjectVersion"
		],
		"Principal": {
			"ID": ["*"]
		},
		"Resource": ["examplebucket/*"],
		"Condition": {
			"StringNotLike": {
				"Referer": [
				"http://storage.example.com*",
				"${null}"
				]
			}
		}
	}]
}

Sample Response 4

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HTTP/1.1 204 No Content 
x-obs-request-id: A603000001604A7DFE4A4AF31E301891
x-obs-id-2: BKOvGmTlt6sda5X4G89PuMO4fabObGYmnpRGkaMba1LqPt0fCACEuCMllAObRK1n
Date: WED, 01 Jul 2015 02:34:34 GMT
Content-Length: 0
Server: OBS
Parent topic: Advanced Bucket Settings