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快速入门(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

本文介绍如何快速使用 TOS Harmony SDK 完成常见操作,例如创建存储桶、上传、下载和删除对象等。

前提条件

  1. 安装 Harmony SDK
  2. 初始化客户端(Harmony SDK)

创建存储桶

桶是 TOS 的全局唯一的命名空间,相当于数据的容器,用来储存对象数据。以下代码展示如何创建一个存储桶。

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
});
// 存储桶名称
const bucketName = 'harmonyos-sdk-test-bucket';

function handleError(error: 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 {
    // 创建桶
    await client.createBucket({
      Bucket: bucketName,
    });
    // 列举所有桶,将列举出刚刚创建的桶
    const { data } = await client.listBuckets();

    // `theBucket` 即为刚刚创建的桶
    const theBucket = data.Buckets.find(it => it.Name === bucketName);
    console.log('the bucket info', theBucket);
  } catch (error) {
    handleError(error);
  }
}

main();

说明

关于创建桶的更多示例,请参见创建桶(Harmony SDK)

上传对象

存储桶创建成功后,可以往桶中上传对象,以下代码展示如何上传一个对象到已创建的桶中。

说明

关于上传对象的更多示例,请参见上传对象

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: 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'; // 目标桶
    const objectName = 'example_dir/example.txt'; // 目标对象
    // 上传对象
    await client.putObject({
      Bucket: bucketName,
      Key: objectName,
      Content: Content: buffer.from('a123').buffer,
    });

    // 查询刚刚上传对象的大小
    const res = await client.headObject({
      Bucket: bucketName,
      Key: objectName,
    });
    // object size: 4
    console.log('object size:', res.ContentLength);
  } catch (error) {
    handleError(error);
  }
}

main();

说明

关于上传对象的更多示例,请参见上传对象概述(Harmony SDK)

下载对象

以下代码展示如何从桶中下载对象。

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: 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);
  }
}

const toString = (arr: ArrayBuffer) => {
  return buffer.from(arr).toString();
}

async function main() {
  try {
    const bucketName = 'harmonyos-sdk-test-bucket'; // 目标桶
    const objectName = 'example_dir/example.txt'; // 目标对象
    // 返回 res.Content 为 stream
    const res = await client.getObject({
      Bucket: bucketName,
      Key: objectName,
    });

    // 获取返回的 stream 中的所有内容
    let allContent = ''
    while (true) {
      const buf = reader.read(10000);
      allContent += toString(buf)
      if (buf.byteLength === 0) {
        reader.close();
        break;
      }
    }

    console.log('object size:', allContent.length);
  } catch (error) {
    handleError(error);
  }
}

main();

说明

关于下载对象的更多示例,请参见下载对象概述(Harmony SDK)

列举对象

以下代码展示如何列举桶中的对象。

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: 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 res = await client.listObjectsType2({
      Bucket: bucketName,
      MaxKeys: 10,
    })
    console.log(`listObjectsType2 bucketName: ${bucketName}, len is ${res.Contents.length}`);
  } catch (error) {
    handleError(error);
  }
}

main();

说明

关于列举对象的更多示例,请参见列举对象 V2(Harmony SDK)

删除对象

如下代码展示如何从桶中删除对象。

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: 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 = 'delete-object-test'; // 目标对象

    const res = await client.deleteObject({
      Bucket: bucketName,
      Key: objectName,
    });
    console.log(`deleteObject bucketName: ${bucketName} status: ${res3.StatusCode}`);
  } catch (error) {
    handleError(error);
  }
}

main();

说明

关于删除对象的更多示例,请参见删除对象(Harmony SDK)