Configuring a Lifecycle Rule When Uploading an Object (SDK for Node.js)

Function

When uploading an object or initiating a multipart upload, you can set an expiration time for the object using Expires. This method only supports setting the object expiration time in days, and the expired objects will be automatically deleted by OBS, with a higher priority than bucket lifecycle rules.

Code Examples: Uploading an Object

When uploading an object, you can specify when it expires after being created.

// 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/eu/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. EU-Dublin is used here as an example. Replace it with the one currently in use.
  server: "https://obs.eu-west-101.myhuaweicloud.eu"
});

async function putObject() {
  try {
    const params = {
      // Specify the bucket name.
      Bucket: "examplebucket",
      // Specify an object (example/objectname in this example).
      Key: "example/objectname",
      // localfile indicates the path of the local file to be uploaded, which must include the file name.
      SourceFile : 'localfile',
      // Specify how many days can pass before the object expires (30 in this example).
      Expires : 30
    };
    // Upload a file.
    const result = await obsClient.putObject(params);
    if (result.CommonMsg.Status <= 300) {
      console.log("Put bucket(%s) successful!", params.Bucket);
      console.log("RequestId: %s", result.CommonMsg.RequestId);
      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);
  };
};

putObject()

Code Examples: Initiating a Multipart Upload

When initiating a multipart upload, you can specify when the object expires after it is created.

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// 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/eu/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. EU-Dublin is used here as an example. Replace it with the one currently in use.
  server: "https://obs.eu-west-101.myhuaweicloud.eu"
});

async function initiateMultipartUpload() {
  try {
    const params = {
      // Specify the bucket name.
      Bucket: "examplebucket",
      // Specify an object (example/objectname in this example).
      Key: "example/objectname",
      // Specify how many days can pass before the object expires (30 in this example).
      Expires : 30
    };
    // Initiate the multipart upload.
    const result = await obsClient.initiateMultipartUpload(params);
    if (result.CommonMsg.Status <= 300) {
      console.log("Initiate multipart upload successfull with bucket(%s) and object(%s)!", params.Bucket, params.Key);
      console.log("RequestId: %s", result.CommonMsg.RequestId);
      console.log("UploadId: %s", result.InterfaceResult.UploadId);
      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);
  };
};

initiateMultipartUpload();