You need to enable JavaScript to run this app.
导航
判断对象是否存在(Harmony SDK)
最近更新时间:2024.12.23 17:29:48首次发布时间:2024.12.23 17:29:48

您可以通过 Harmony SDK 的 headObject 接口判断对象是否存在。

注意事项

判断对象是否存在前,您的账号必须具备 tos:GetObject 权限,具体操作请参见权限配置指南

示例代码

import { TosClient, TosClientError, TosServerError } from '@volcengine/tos_harmonyos_sdk';

// 创建客户端
const client = new TosClient({
  accessKeyId: "Provide your ak", 
  accessKeySecret: "Provide your sk", 
  securityToken: 'Provide your securityToken',
  region: "Provide your region", // 填写 Bucket 所在地域。以华北2(北京)为例,"Provide your region" 填写为 cn-beijing。
  endpoint: "Provide your endpoint", // 填写域名地址
});

function handleError(error) {
  if (error instanceof TosClientError) {
    console.log('Client Err Name:', error.name);
    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 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 = 'node-sdk-test-bucket';
    // 存储桶中的对象名
    const objectKey = 'example_dir/example.txt';

    const res = await client.headObject({
      Bucket: bucketName,
      Key: objectKey,
    });
    console.log('The object exists.');
    console.log('headObject Request ID:', res.RequestId);
  } catch (error) {
    if (error instanceof TosServerError) {
      if (error.StatusCode === 404) {
        // 对象不存在
        console.log(`The object doesn't exist`);
        return;
      }
    }

    handleError(error);
  }
}

main();

相关文档

关于判断对象是否存在的 API 接口,请参见 HeadObject