Object Storage Service:Restore objects (Go SDK V2)

Before you begin

• The sample code uses the China (Hangzhou) region (cn-hangzhou). The public endpoint is used by default. To access OSS from other Alibaba Cloud services in the same region, use the internal endpoint. For region-to-endpoint mappings, see Regions and endpoints.

• The sample code retrieves access credentials from environment variables. For other options, see Configure access credentials.

• Restoring an object requires the oss:RestoreObject permission. For details, see Attach a custom policy to a RAM user.

Sample code

The following code restores Archive, Cold Archive, or Deep Cold Archive objects:

package main

import (
	"context"
	"flag"
	"log"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

// Define global variables.
var (
	region     string // The region.
	bucketName string // The bucket name.
	objectName string // The object name.
)

// Specify command-line parameters.
func init() {
	flag.StringVar(&region, "region", "", "The region in which the bucket is located.")
	flag.StringVar(&bucketName, "bucket", "", "The name of the bucket.")
	flag.StringVar(&objectName, "object", "", "The name of the object.")
}

func main() {
	// Parse command-line parameters.
	flag.Parse()

	// Validate the bucket name.
	if len(bucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, bucket name required")
	}

	// Validate the region.
	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}

	// Validate the object name.
	if len(objectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, object name required")
	}

	// Load the default configuration and set the credential provider and region.
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region)

	// Create an OSS client.
	client := oss.NewClient(cfg)

	// Build the restore request.
	request := &oss.RestoreObjectRequest{
		Bucket:    oss.Ptr(bucketName),      // The bucket name.
		Key:       oss.Ptr(objectName),      // The object name.
		VersionId: oss.Ptr("yourVersionId"), // Specify the actual version ID.
		RestoreRequest: &oss.RestoreRequest{
			Days: 3, // Number of days the restored state is retained.
		},
	}

	// Send the restore request.
	result, err := client.RestoreObject(context.TODO(), request)
	if err != nil {
		log.Fatalf("failed to restore object %v", err)
	}

	// Print the restore result.
	log.Printf("restore object result:%#v\n", result)
}

References

• For the complete sample code, see GitHub sample.

• For RestoreObject API details, see RestoreObject.

• For general information about restoring objects, see Restore objects.