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Object Storage Service:Restore an object

Last Updated:Dec 14, 2023

You must restore Archive, Cold Archive, and Deep Cold Archive objects before you can read the objects. This topic describes how to restore Archive, Cold Archive, and Deep Cold Archive objects.

Usage notes

  • You can call the RestoreObject operation to restore only Archive and Cold Archive objects.

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

  • 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 restore objects, you must have the oss:RestoreObject permission. For more information, see Attach a custom policy to a RAM user.

Restore an Archive object

The following sample code provides an example on how to restore an Archive object:

package main

import (
  "fmt"
  "github.com/aliyun/aliyun-oss-go-sdk/oss"
  "os"
)

func HandleError(err error) {
  fmt.Println("Error:", err)
  os.Exit(-1)
}

func main() {
  // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
  provider, err := oss.NewEnvironmentVariableCredentialsProvider()
  if err != nil {
    fmt.Println("Error:", err)
    os.Exit(-1)
  }

  // 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. 
  client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
  if err != nil {
    HandleError(err)
  }

  // Specify the name of the bucket. Example: examplebucket. 
  bucketName := "examplebucket"
  // Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. 
  objectName := "exampledir/exampleobject.txt" 
  archiveBucket, err := client.Bucket(bucketName)
  if err != nil {
    HandleError(err)
  }
  // Restore the Archive object. 
  err = archiveBucket.RestoreObject(objectName)
  if err != nil {
    HandleError(err)
  }

  fmt.Println("ArchiveSample completed")
}

Restore a Cold Archive or Deep Cold Archive object

The following sample code provides an example on how to restore a Cold Archive or Deep Cold Archive object:

package main

import (
    "fmt"
    "os"

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

func main() {
    // Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
    provider, err := oss.NewEnvironmentVariableCredentialsProvider()
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // 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. 
    client, err := oss.New("yourEndpoint", "", "", oss.SetCredentialsProvider(&provider))
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    // Specify the name of the bucket. Example: examplebucket. 
    bucket, err := client.Bucket("examplebucket")
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }

    var restoreConfig oss.RestoreConfiguration

    // Specify that the object is restored within 1 hour. 
    // restoreConfig.Tier = string(oss.RestoreExpedited)
    // Specify that the object is restored within 2 to 5 hours. 
    // restoreConfig.Tier = string(oss.RestoreStandard)
    // Specify that the object is restored within 5 to 12 hours. 
    // restoreConfig.Tier = string(oss.RestoreBulk)

    // Specify the duration for which the object remains in the restored state. Unit: days. Valid values: 1 to 365. 
    restoreConfig.Days = 1
    // Restore the Cold Archive or Deep Cold Archive object. // Specify the full path of the object. Do not include the bucket name in the full path. Example: exampledir/exampleobject.txt. 
    err = bucket.RestoreObjectDetail("yourObjectName", restoreConfig)
    if err != nil {
        fmt.Println("Error:", err)
        os.Exit(-1)
    }
}

References

For more information about the API operation that you can call to restore Archive, Cold Archive, and Cold archive objects, see RestoreObject.