Object Storage Service:Query information about a bucket by using OSS SDK for Go

A bucket is a container that is used to store objects in Object Storage Service (OSS). You can use OSS SDK for Go to query bucket information such as the access tracking state, region, creation date, access control list (ACL), name and ID of the owner, storage class, redundancy type, public endpoint, internal endpoint, cross-region replication (CRR) state, versioning state, and encryption method. This helps you perform subsequent operations. For example, you can use the obtained public endpoint together with the name of an object to access the object.

Usage notes

• In this topic, the public endpoint of the China (Hangzhou) region is used. If you want to access OSS from other Alibaba Cloud services in the same region as OSS, use an internal endpoint. For more information about OSS regions and endpoints, see Regions, endpoints and open ports.

• In this topic, access credentials are obtained from environment variables. For more information about how to configure access credentials, see Configure access credentials.

• In this topic, an OSSClient instance is created by using an OSS endpoint. If you want to create an OSSClient instance by using custom domain names or Security Token Service (STS), see Initialization.

• To query information about a bucket, you must have the oss:GetBucketInfo permission. For more information, see Attach a custom policy to a RAM user.

• Object Storage Service (OSS) SDK for Go 2.2.5 or later supports all attributes that are included in the following sample code.

Examples

The following sample code provides an example on how to query information about a bucket:

package main

import (
	"log"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Obtain access credentials from environment variables. 
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		log.Fatalf("Failed to get credentials from environment variables: %v", err)
	}

	// Create an OSSClient instance. 
	// Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
	// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		log.Fatalf("Failed to create new OSS client: %v", err)
	}

	// Specify the name of the bucket. Example: examplebucket. 
	bucketName := "examplebucket"
	res, err := client.GetBucketInfo(bucketName)
	if err != nil {
		log.Fatalf("Failed to get bucket info for bucket '%s': %v", bucketName, err)
	}

	log.Printf("Bucket Info Name: %s\n", res.BucketInfo.Name)         // Display the name of the bucket.
	log.Printf("Bucket Info Location: %s\n", res.BucketInfo.Location) // Display the region in which the bucket is located.
}

Common parameters for bucket information

References

• For more information about buckets, see Overview.

• For more information about the API operation that you can call to query information about a bucket, see GetBucketInfo.