Configuring Object Metadata

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.

You can call ObsClient.setObjectMetadata to set object attributes, including system-defined metadata (CacheControl, ContentDisposition, ContentType, StorageClass, and Expires).

This example configures the Content-Disposition metadata for objectname in bucketname.

The example code is as follows:

// Create an ObsClient instance.
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 object, so you need to use a module bundler like webpack to define environment variables.
    // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/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.ap-southeast-1.myhuaweicloud.com'
});
obsClient.setObjectMetadata({
       Bucket : 'bucketname',
       Key : 'objectname',
       Content-Disposition : 'attchment;filename=1.txt',
       MetadataDirective : 'REPLACE_NEW'
}, function (err, result){
       if(err){              
          console.error('Error-->' + err);       
       }else{              
          console.log('Status-->' + result.CommonMsg.Status);        
       }
});

• To handle the error codes possibly returned during the operation, see OBS Server-Side Error Codes.