Batch Deleting Objects (SDK for Node.js)

If you have any questions during development, post them on the Issues page of GitHub.

Exercise caution when performing this operation. If versioning is disabled for the bucket where objects are located, objects cannot be restored after being deleted.

Function

This API deletes objects in a batch from a specific bucket. Deleted objects cannot be restored.

In a batch deletion, OBS concurrently deletes the specified objects and returns the deletion result of each object.

Restrictions

To delete objects in a batch, you must be the bucket owner or have the required permission (obs:object:DeleteObject in IAM or DeleteObject in a bucket policy). For details, see Introduction to OBS Access Control, IAM Custom Policies, and Configuring an Object Policy.
To learn about the mappings between OBS regions and endpoints, see Regions and Endpoints.
If versioning is not enabled for a bucket, deleted objects cannot be restored.
A maximum of 1,000 objects can be deleted at a time. If you send a request for deleting more than 1,000 objects, OBS returns an error message.
After concurrent tasks are assigned, if an internal error occurs during cyclic deletion of multiple objects, an object may be deleted in the index data but still exist in the metadata.

Method

ObsClient.deleteObjects(params)

Request Parameters

**Table 1** List of request parameters
Parameter	Type	Mandatory (Yes/No)	Description
Bucket	string	Yes	Explanation: Bucket name Restrictions: A bucket name must be unique across all accounts and regions. A bucket name: Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed. Cannot be formatted as an IP address. Cannot start or end with a hyphen (-) or period (.). Cannot contain two consecutive periods (..), for example, my..bucket. Cannot contain a period (.) and a hyphen (-) adjacent to each other, for example, my-.bucket or my.-bucket. If you repeatedly create buckets with the same name in the same region, no error will be reported, and the bucket attributes comply with those set in the first creation request. Value range: The value can contain 3 to 63 characters. Default value: None
Quiet	boolean	No	Explanation: Mode of the response to the request for deleting objects in a batch Restrictions: None Value range: false: The detailed mode. Results of both successful and failed deletions are returned. true: The quiet mode. Only results of failed deletions are returned. Default value: false
Objects	ObjectToDelete[]	Yes	Explanation: List of objects to be deleted. For details, see Table 2. Restrictions: A maximum of 1000 objects can be deleted at a time. Value range: None Default value: None
EncodingType	string	No	Explanation: Encoding type for Key in the response. If Key in the response contains control characters that are not supported by the XML 1.0 standard, you can specify this parameter to encode Key. Restrictions: None Value range: url Default value: None. If you leave this parameter blank, encoding is not applied.

**Table 2** ObjectToDelete
Parameter	Type	Mandatory (Yes/No)	Description
Key	string	Yes	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path of the object that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt. Restrictions: None Value range: The value can contain 1 to 1,024 characters. Default value: None
VersionId	string	No	Explanation: ID of the object version to be deleted, for example, G001117FCE89978B0000401205D5DC9. Restrictions: None Value range: The value must contain 32 characters. Default value: None. If this parameter is left blank, the latest version of the object is deleted.

Responses

**Table 3** Responses
Type	Description
Table 4 NOTE: This API returns a Promise response, which requires the Promise or async/await syntax.	Explanation: Returned results. For details, see Table 4.

**Table 4** Response
Parameter	Type	Description
CommonMsg	ICommonMsg	Explanation: Common information generated after an API call is complete, including the HTTP status code and error code. For details, see Table 5.
InterfaceResult	Table 6	Explanation: Results outputted for a successful call. For details, see Table 6. Restrictions: This parameter is not included if the value of Status is greater than 300.

**Table 5** ICommonMsg
Parameter	Type	Description
Status	number	Explanation: HTTP status code returned by the OBS server. Value range: A status code is a group of digits indicating the status of a response. It ranges from 2xx (indicating successes) to 4xx or 5xx (indicating errors). For details, see Status Codes.
Code	string	Explanation: Error code returned by the OBS server.
Message	string	Explanation: Error description returned by the OBS server.
HostId	string	Explanation: Request server ID returned by the OBS server.
RequestId	string	Explanation: Request ID returned by the OBS server.
Id2	string	Explanation: Request ID2 returned by the OBS server.
Indicator	string	Explanation: Error code details returned by the OBS server.

**Table 6** DeleteObjectsOutput
Parameter	Type	Description
RequestId	string	Explanation: Request ID returned by the OBS server
Deleteds	Deleted[]	Explanation: List of objects that were successfully deleted. For details, see Table 7.
Errors	Error[]	Explanation: List of objects that failed to be deleted. For details, see Table 8.
EncodingType	string	Explanation: Encoding type for Key in the response. If Key in the response contains control characters that are not supported by the XML 1.0 standard, you can specify this parameter to encode Key.

**Table 7** Deleted
Parameter	Type	Description
Key	string	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path of the object that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt.
VersionId	string	Explanation: Object version ID, for example, G001117FCE89978B0000401205D5DC9.
DeleteMarker	bool	Explanation: Whether the deleted object is a delete marker. Value range: true: The deleted object is a delete marker. false: The deleted object is not a delete marker.
DeleteMarkerVersionId	string	Explanation: Version ID of a delete marker to create or delete. OBS returns this element in the response when a delete marker is created or deleted for a versioning-enabled bucket. This element will be returned in either of the following cases: You send a delete request specifying an object's name without providing a version ID. In this case, OBS creates a delete marker and returns its version ID in the response. You send a delete request specifying both an object's name and its version ID, but this version ID points to a delete marker. In this case, OBS deletes the delete marker and returns its version ID in the response.

**Table 8** Error
Parameter	Type	Description
Key	string	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path of the object that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt.
VersionId	string	Explanation: Object version ID, for example, G001117FCE89978B0000401205D5DC9.
Code	string	Explanation: Error code for the failed deletion. For details, see OBS Error Codes.
Message	string	Explanation: Error message for the failed deletion. For details, see OBS Error Codes.

Code Examples

Sample code:

    
     
       
       
         // Import the OBS library.
// Use npm to install the client.
const ObsClient = require("esdk-obs-nodejs");
// Use the source code to install the client.
// var ObsClient = require('./lib/obs');

// Create an instance of ObsClient.
const obsClient = new ObsClient({
  // Obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways. Using hard coding may result in leakage.
  // 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.ACCESS_KEY_ID,
  secret_access_key: process.env.SECRET_ACCESS_KEY,
  // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
  // security_token: process.env.SECURITY_TOKEN,
  // Enter the endpoint corresponding to the region where the bucket is located. CN-Hong Kong is used here in this example. Replace it with the one currently in use.
  server: "https://obs.ap-southeast-1.myhuaweicloud.com"
});

async function deleteObjects() {
  try {
    const params = {
      // Specify the bucket name.
      Bucket: "examplebucket",
      // Specify the object list to delete.
      Objects: [
        { Key: 'objectname1', VersionId: "version1" },
        { Key: 'objectname2', VersionId: "version2" },
        { Key: 'objectname3', VersionId: "version3" }
      ]
    };
    // Delete the objects in a batch.
    const result = await obsClient.deleteObjects(params);
    if (result.CommonMsg.Status <= 300) {
      console.log("Delete objects under the bucket(%s) successful!", params.Bucket);
      console.log("RequestId: %s", result.CommonMsg.RequestId);
      // Return details about which objects were deleted.
      console.log('Deleteds:');
      for (let i = 0; i < result.InterfaceResult.Deleteds.length; i++) {
        const deleted = result.InterfaceResult.Deleteds[i];
        console.log("Deleted[%d]-Key:%s, VersionId:%s", i, deleted.Key, deleted.VersionId);
      };
      // Return details about which objects were not deleted.
      console.log('Errors:');
      for (let i = 0; i < result.InterfaceResult.Errors.length; i++) {
        const err = result.InterfaceResult.Errors[i];
        console.log("Errors[%d]-Key:%s, Code:%s", i, err.Key, err.Code);
      };
    };
    console.log("An ObsError was found, which means your request sent to OBS was rejected with an error response.");
    console.log("Status: %d", result.CommonMsg.Status);
    console.log("Code: %s", result.CommonMsg.Code);
    console.log("Message: %s", result.CommonMsg.Message);
    console.log("RequestId: %s", result.CommonMsg.RequestId);
  } catch (error) {
    console.log("An Exception was found, which means the client encountered an internal problem when attempting to communicate with OBS, for example, the client was unable to access the network.");
    console.log(error);
  };
};

deleteObjects();

        

      

    
   