QingStor SDK for JavaScript

The official QingStor SDK for the JavaScript programming language.

Break Changes in 3.0.0

Config should be initialized like this: const config = new Config({ access_key_id, secret_access_key })

Install

Use npm or yarn to install SDK

npm install qingstor-sdk

# or
yarn add qingstor-sdk

Alternatively, you can also use SDK by script tag. Go to the release page, download and save the SDK into you project, then in your HTML:

<script src="https://example.com/path/to/qingstor-sdk.js"></script>
<script>
  // reference sdk by a global variable: qingstor_sdk
  console.log(qingstor_sdk.version);
  console.log(qingstor_sdk.QingStor);
  console.log(qingstor_sdk.Config);
</script>

We recommend using the uncompressed version during development for debugging purposes. Use the qingstor-sdk.min.js in production environment.

Quick Start

QingStor JS SDK is written in ES6 syntax, so make sure you have the right build environment before using it.

Browser Environment

If you are using the SDK in browser, it is recommended to compile the code using Babel and package the code using Webpack.

install Babel firstly:

npm install --save-dev @babel/core @babel/cli @babel/preset-env

then create file babel.config.js in the root folder of your project with the following content:

const presets = [
  [
    "@babel/env",
    {
      targets: {
        edge: "17",
        firefox: "60",
        chrome: "67",
        safari: "11.1",
      },
      useBuiltIns: "usage",
    },
  ],
];

module.exports = { presets };

install webpack:

npm install --save-dev webpack webpack-cli

create the file webpack.config.js in the root folder of project, copy and paste code below:

module.exports = {
  mode: 'development',

  // you can import { QingStor } from 'qingstor-sdk' in this file
  entry: './index.js',

  output: {
    filename: 'dist.js',
    libraryTarget: 'umd',
  },

  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      }
    ]
  }
}

open your terminal and input ./node_modules/.bin/webpack -w for developing. For more details on the configuration and use of Babel and Webpack, please refer to its official documentation.

Node Environment

If you are using the SDK in a Node environment, it is recommended to use esm as the module loader.

install esm:

npm install esm

use esm:

node -r esm index.js

Request Signature

Requests sent to the QingStor must be signed by Access Key and Secret Key. Please go to the [QingCloud Console] (https://console.qingcloud.com/access_keys/) to create and download them. The downloaded key file format is as follows, please save your key properly.

access_key_id: 'ACCESS_KEY_ID_EXAMPLE'
secret_access_key: 'SECRET_ACCESS_KEY_EXAMPLE'

If you use the SDK in the Node environment, you can initialize the Config object as follow:

import { Config } from 'qingstor-sdk';

const config = new Config({
  access_key_id: 'ACCESS_KEY_ID_EXAMPLE',
  secret_access_key: 'SECRET_ACCESS_KEY_EXAMPLE',
});

If you use the SDK in browser environment, we strongly recommend deploying a signature server that is specifically used to sign requests, so the access_key_id and secret_access_key will not exposing to the client.

The code for the signature server is very simple, please refer to the [Express Example] (./docs/examples/signaure_server.js). After the signature server is deployed, initialize the Config object as follows:

import { Config } from 'qingstor-sdk';

const config = new Config({
  signature_server: 'https://your.signserver.com/some_path',
});

Note: If the signature server uses a different domain from user's, you need to configure the corresponding [CORS] (https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) rule.

Get Bucket list

create a file call index.js with following content:

// index.js

import { QingStor, Config } from 'qingstor-sdk';

const config = new Config({
  access_key_id: 'ACCESS_KEY_ID_EXAMPLE',
  secret_access_key: 'SECRET_ACCESS_KEY_EXAMPLE',
});
// or
const config = new Config({
  signature_server: 'https://your.signserver.com/some_path',
});

const qingstor = new QingStor(config);

function listBuckets() {
  qingstor.listBuckets().then((response) => {
    console.log(response.data);
    // output as follow
    // {
    //   "count": 2,
    //   "buckets": [
    //     {
    //       "name": "mybucket",
    //       "location": "pek3a",
    //       "url": "https://mybucket.pek3a.qingstor.com",
    //       "created": "2015-07-11T04:45:57Z"
    //     },
    //     {
    //       "name": "myphotos",
    //       "location": "pek3a",
    //       "url": "https://myphotos.pek3a.qingstor.com",
    //       "created": "2015-07-12T09:40:32Z"
    //     }
    //   ]
    // }
  });
}

listBuckets();

Create Bucket

import { QingStor, Config } from 'qingstor-sdk';

const config = new Config({
  access_key_id: 'ACCESS_KEY_ID_EXAMPLE',
  secret_access_key: 'SECRET_ACCESS_KEY_EXAMPLE',
});
// or
const config = new Config({
  signature_server: 'https://your.signserver.com/some_path',
});

const qingstor = new QingStor(config);

function createBucket() {
  qingstor.Bucket('example-bucket', 'sh1a').put().then(({ status }) => {
    // bucket create succeed, status should be 201
    console.log(status);
  }).catch((error) => {
    // bucket create failed
    console.log(error.response.data);
  });
}

createBucket();

Get object list in a Bucket

import { QingStor, Config } from 'qingstor-sdk';

const config = new Config({
  access_key_id: 'ACCESS_KEY_ID_EXAMPLE',
  secret_access_key: 'SECRET_ACCESS_KEY_EXAMPLE',
});
// or
const config = new Config({
  signature_server: 'https://your.signserver.com/some_path',
});

const bucket = new QingStor(config).Bucket('example-bucket', 'sh1a');

function listObjects() {
  // list objects under perfix '/images'
  bucket.listObjects({
    limit: 10,
    prefix: '/images',
  }).then((response) => {
    console.log(response.data);
  }).catch((error) => {
    console.log(error.response.data);
  });
}

listObjects();

Response format

QingStor SDK uses [axios] (https://github.com/axios/axios) as http client, and all requests are returned as a Promise. The response structure of axios is as follows:

// copied from https://github.com/axios/axios/blob/master/README.md
{
  // `data` is the response that was provided by the server
  data: {},

  // `status` is the HTTP status code from the server response
  status: 200,

  // `statusText` is the HTTP status message from the server response
  statusText: 'OK',

  // `headers` the headers that the server responded with
  // All header names are lower cased
  headers: {},

  // `config` is the config that was provided to `axios` for the request
  config: {},

  // `request` is the request that generated this response
  // It is the last ClientRequest instance in node.js (in redirects)
  // and an XMLHttpRequest instance in the browser
  request: {}
}

yu31/qingstor-sdk-js