Listing Buckets (SDK for Node.js)

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Function

OBS buckets are containers for storing objects you upload to OBS. This API returns a list of all buckets that meet the specified conditions in all regions of the current account. Returned buckets are listed in alphabetical order by bucket name.

Restrictions

To list buckets, you must have the obs:bucket:ListAllMyBuckets permission. IAM is recommended for granting permissions. For details, see IAM Custom Policies.

To learn about the mappings between OBS regions and endpoints, see Regions and Endpoints.

Method

ObsClient.listBuckets(params)

Request Parameters

**Table 1** List of request parameters
Parameter	Type	Mandatory (Yes/No)	Description
QueryLocation	boolean	No	Explanation: Whether to query the bucket location Restrictions: None Value range: true: The bucket location is queried. false: The bucket location is not queried. Default value: false
BucketType	string	No	Explanation: Type of bucket. Restrictions: None Value range: See BucketType. Default value: None. If this parameter is not specified, all buckets and parallel file systems are listed.

**Table 2** BucketType
Constant	Description
OBJECT	An object bucket
POSIX	A parallel file system (POSIX)

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	ListBucketsOutput	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** ListBucketsOutput
Parameter	Type	Description
RequestId	string	Explanation: Request ID returned by the OBS server Default value: None
Owner	Owner	Explanation: Bucket owner Value range: See Table 7.
Buckets	Bucket[]	Explanation: Bucket information list Value range: See Table 8.

**Table 7** Owner
Parameter	Type	Mandatory (Yes/No)	Description
ID	string	Yes if used as a request parameter	Explanation: Account (domain) ID of the owner Value range: To obtain the account ID, see How Do I Get My Account ID and User ID? (SDK for Node.js) Default value: None
DisplayName	string	No	Explanation: Account name of the owner Default value: None

**Table 8** Bucket
Parameter	Type	Description
BucketName	string	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 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. Default value: None
CreationDate	string	Explanation: When the bucket was created. Default value: None
Location	string	Explanation: Where a bucket is located. Restrictions: If the used endpoint is obs.myhuaweicloud.com, this parameter is not required. If any other endpoint is used, this parameter is required. Value range: To learn about valid regions and endpoints, see Regions and Endpoints. An endpoint is the request address for calling an API. Endpoints vary depending on services and regions. To obtain the regions and endpoints, contact the enterprise administrator. Default value: If obs.myhuaweicloud.com is used as the endpoint and no region is specified, cn-north-1 (the CN North-Beijing1 region) is used by default.
BucketType	string	Explanation: Bucket type Value range: Object bucket: OBJECT Parallel file system: POSIX Default value: None

Code Examples

You can call ObsClient.listBuckets to list buckets. This example lists all buckets.

    
     
       
       
         // 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 listBuckets() {
  try {
    const params = {
      // Specify whether to query the bucket location in the listing. The default value is false. true is used in this example.
      QueryLocation: true,
      // Specify a bucket type (object buckets in this example). If this parameter is not specified, object buckets and parallel file systems are listed by default.
      BucketType: "OBJECT",
    };
    // List buckets.
    const result = await obsClient.listBuckets(params);
    if (result.CommonMsg.Status <= 300) {
      console.log("List buckets successful!", params.Bucket);
      console.log("RequestId: %s", result.CommonMsg.RequestId);
      console.log('Owner:');
      console.log('ID: %s', result.InterfaceResult.Owner.ID);
      console.log('Name: %s', result.InterfaceResult.Owner.Name);
      console.log('Buckets:');
      for (let i = 0; i < result.InterfaceResult.Buckets.length; i++) {
          const val = result.InterfaceResult.Buckets[i];
          console.log("Bucket[%d]-Name:%s,CreationDate:%s,Location: %s",
            i, val.BucketName, val.CreationDate, val.Location);
      };
      return;
    };
    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);
  };
};

listBuckets();

        

      

    
   