Configuring a Storage Class for a Bucket

Function

This API configures a storage class for a bucket. If you do not specify a storage class when uploading or copying an object, or initiating a multipart upload, the object will inherit the bucket's storage class.

Restrictions

• To configure a storage class for a bucket, you must be the bucket owner or have the required permission (obs:PutBucketStoragePolicy in IAM or PutBucketStoragePolicy in a bucket policy).

Method

func (obsClient ObsClient) SetBucketStoragePolicy(input *SetBucketStoragePolicyInput) (output *BaseModel, err error)

Request Parameters

Table 1 List of request parameters

Parameter	Type	Mandatory (Yes/No)	Description
input	*SetBucketStoragePolicyInput	Yes	Explanation: Input parameters for configuring a bucket storage class. For details, see Table 2.

Table 2 SetBucketStoragePolicyInput

Parameter	Type	Mandatory (Yes/No)	Description
Bucket	string	Yes	Explanation: Bucket name Restrictions: A bucket name must be unique across all accounts and regions. A bucket name: Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed. Cannot be formatted as an IP address. Cannot start or end with a hyphen (-) or period (.). Cannot contain two consecutive periods (..), for example, my..bucket. Cannot contain a period (.) and a hyphen (-) adjacent to each other, for example, my-.bucket or my.-bucket. If you repeatedly create buckets of the same name in the same region, no error will be reported and the bucket attributes comply with those set in the first creation request. Value range: The value must contain 3 to 63 characters. Default value: None
StorageClass	StorageClassType	Yes	Explanation: Storage class of the bucket Value range: For details about storage classes, see Table 3. Default value: None

Table 3 StorageClassType

Constant	Default Value	Description
StorageClassStandard	STANDARD	OBS Standard Features low access latency and high throughput and is used for storing massive, frequently accessed (multiple times a month) or small objects (< 1 MB) requiring quick response.
StorageClassWarm	WARM	OBS Warm Used for storing data that is semi-frequently accessed (fewer than 12 times a year) but is instantly available when needed.
StorageClassCold	COLD	OBS Cold Used for storing rarely accessed (once a year) data.

Responses

Table 4 List of returned results

Parameter	Type	Description
output	*BaseModel	Explanation: Returned results. For details, see Table 5.
err	error	Explanation: Error messages returned by the API

Table 5 BaseModel

Parameter	Type	Description
StatusCode	int	Explanation: HTTP status code Value range: A status code is a group of digits that can be 2xx (indicating successes) or 4xx or 5xx (indicating errors). It indicates the status of a response. Default value: None
RequestId	string	Explanation: Request ID returned by the OBS server Default value: None
ResponseHeaders	map[string][]string	Explanation: HTTP response headers Default value: None

Code Examples

This example returns the storage class of bucket examplebucket.

package main
import (
    "fmt"
    "os"
    "obs-sdk-go/obs"
)
func main() {
    //Obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways. Using hard coding may result in leakage.
    //Obtain an AK/SK pair on the management console.
    ak := os.Getenv("AccessKeyID")
    sk := os.Getenv("SecretAccessKey")
    // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding to reduce leakage risks. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
    // securityToken := os.Getenv("SecurityToken")
    // Enter the endpoint of the region where the bucket locates.
    endPoint := "https://your-endpoint"
    // Create an obsClient instance.
    // If you use a temporary AK/SK pair and a security token to access OBS, use the obs.WithSecurityToken method to specify a security token when creating an instance.
    obsClient, err := obs.New(ak, sk, endPoint/*, obs.WithSecurityToken(securityToken)*/)
    if err != nil {
        fmt.Printf("Create obsClient error, errMsg: %s", err.Error())
    }
    input := &obs.SetBucketStoragePolicyInput{}
    // Specify a bucket name.
    input.Bucket = "bucketname"
    // Specify a storage class (obs.StorageClassWarm as an example) for the bucket.
    input.StorageClass = obs.StorageClassWarm
    // Configure a storage class for the bucket.
    output, err := obsClient.SetBucketStoragePolicy(input)
    if err == nil {
        fmt.Printf("Set bucket(%s)'s storage-class successful!\n", input.Bucket)
        fmt.Printf("Set bucket storage-class successful!\n")
        fmt.Printf("RequestId:%s\n", output.RequestId)
        return
    }
    fmt.Printf("Set bucket(%s)'s storage-class fail!\n", input.Bucket)
    if obsError, ok := err.(obs.ObsError); ok {
        fmt.Println("An ObsError was found, which means your request sent to OBS was rejected with an error response.")
        fmt.Println(obsError.Error())
    } else {
        fmt.Println("An Exception was found, which means the client encountered an internal problem when attempting to communicate with OBS, for example, the client was unable to access the network.")
        fmt.Println(err)
    }
}

last updated: 2025-08-28 14:06 UTC - commit: 39882e2dd8910deda6bee60c54bef141ea2cac76