The following code is used to generate the POST form signature data required for adding the putObject-from-preSignedPostSignature-test object to the node-sdk-test-bucket bucket using a pre-signed POST form.

import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';​
​
​
const client = new TosClient({​
  accessKeyId: "Provide your ak",​
  accessKeySecret: "Provide your sk",​
  securityToken: 'Provide your securityToken',​
  region: "Provide your region", ​
  endpoint: "Provide your endpoint", ​
});​
function handleError(error) {​
  if (error instanceof TosClientError) {​
    console.log('Client Err Msg:', error.message);​
    console.log('Client Err Stack:', error.stack);​
  } else if (error instanceof TosServerError) {​
    console.log('Request ID:', error.requestId);​
    console.log('Response Status Code:', error.statusCode);​
    console.log('Response Header:', error.headers);​
    console.log('Response Err Code:', error.code);​
    console.log('Response Err Msg:', error.message);​
  } else {​
    console.log('unexpected exception, message: ', error);​
  }​
}​
​
async function main() {​
  try {​
    const bucketName = 'harmonyos-sdk-test-bucket';​
    const objectName = 'putObject-from-preSignedPostSignature-test';​
​
    const res = await client.preSignedPostSignature({​
      Bucket: bucketName,​
      Key: objectName,​
      Expires: 3600,​
    });​
    ​
    console.log('preSignedPostSignature:', res.Signature);​
  } catch (error) {​
    handleError(error);​
  }​
}​
​
main();​

Relevant Documentation

For detailed information on POST form presigning, see Including signatures in browser-based upload forms.

Last updated: 2025.09.26 19:05:17

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