Downloading an Archive Object

If you have any questions during development, post them on the Issues page of GitHub. For details about parameters and usage of each API, see the API Reference.

Before you can download an Archive object, you must restore it. Archive objects can be restored in either of the following ways.

To prolong the validity period of the Archive data restored, you can repeatedly restore the Archive data, but you will be billed for each restore. After a second restore, the validity period of Standard object copies will be prolonged, and you need to pay for storing these copies during the prolonged period.

You can call ObsClient.restoreObject to restore an Archive object. Sample code is as follows:

// Create an instance of ObsClient.
var obsClient = new ObsClient({
    // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables AccessKeyID and SecretAccessKey.
    // The front-end code does not have the process environment variable, so you need to use a module bundler like webpack to define the process variable.
    // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
    access_key_id: process.env.AccessKeyID,
    secret_access_key: process.env.SecretAccessKey,
    // Replace the example endpoint with the actual one in your case.
    server: 'https://obs.eu-west-101.myhuaweicloud.eu'
});

// Restore an object in the Archive storage class.
obsClient.restoreObject({
       Bucket : 'bucketname',
       Key : 'objectname',
       Days : 1,
       Tier : obsClient.enums.RestoreTierExpedited
}, function (err, result) {
       if(err){
              console.error('Error-->' + err);
       }else{
              console.log('Status-->' + result.CommonMsg.Status);
              
// Wait for the object to be restored.
              setTimeout(function () {
                     
                     // Download the object and obtain the object content.
                     obsClient.getObject({
                           Bucket : 'bucketname',
                           Key : 'objectname'
                     }, function (err, result) {
                            if(err){              
                               console.error('Error-->' + err);       
                            }else{              
                               console.log('Status-->' + result.CommonMsg.Status); 
                               if(result.CommonMsg.Status < 300 && result.InterfaceResult){     
                                   // Obtain the object content.
                                   console.log('Object Content:');                            
                                   console.log(result.InterfaceResult.Content);   
                               }    
                            }
                     });
              }, 6 * 60 * 1000);
       }
});

• The object specified in ObsClient.restoreObject must be in the OBS Archive storage class. Otherwise, an error will be reported when you call this API.
• Use the Days parameter to specify the retention period (from 1 to 30 days) of the restored objects and the Tier parameter to specify the time spent on restoring the objects.