生成带授权信息的表单上传参数(Harmony SDK)

// 引入依赖包
import ObsClient from '@obs/esdk-obs-harmony';

// 指定存储桶名称
const bucketName = "examplebucket";
// 指定对象，此处以 example/objectname 为例
const objectKey = "example/objectname";
 // Server填写Bucket对应的Endpoint, 这里以华北-北京四为例，其他地区请按实际情况填写
const server = "https://obs.cn-north-4.myhuaweicloud.com";
// 文件的本地存储路径。仅支持"internal"协议类型，"internal://cache/"为应用的私有目录，是必填字段
const sourceFile = "internal://cache/hello.txt";

// 创建ObsClient实例
const obsClient = new ObsClient({
  // 推荐通过环境变量获取AKSK，这里也可以使用其他外部引入方式传入，如果使用硬编码可能会存在泄露风险
  // 您可以登录访问管理控制台获取访问密钥AK/SK，获取方式请参见https://support.huaweicloud.com/usermanual-ca/ca_01_0003.html
  AccessKeyId: process.env.ACCESS_KEY_ID,
  SecretAccessKey: process.env.SECRET_ACCESS_KEY,
  // 【可选】如果使用临时AK/SK和SecurityToken访问OBS，同样建议您尽量避免使用硬编码，以降低信息泄露风险。您可以通过环境变量获取访问密钥AK/SK，也可以使用其他外部引入方式传入
  // SecurityToken: process.env.SECURITY_TOKEN,
  Server,
});

const postObject = async () => {
  const result = obsClient.createPostSignatureSync({
    // 指定存储桶名称
    Bucket: bucketName,
    // 指定对象名
    Key: objectKey,
    // 指定带授权信息的URL的过期时间。
    Expires: 3600,
    // 指定请求中携带的头域
    Headers: {
      "Content-Type": "text/plain"
    }
    // 指定表单上传时参数
    FormParams: {
      "x-obs-acl": "public-read",
      "content-type": "text/plain",
    }
  });

  let uploadTask: request.UploadTask;
  // 指定上传的配置信息，可参考鸿蒙开发者文档https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-request-V5#uploadconfig6
  let uploadConfig: request.UploadConfig = {
    url: `https://${bucketName}.${server}`,
    method: "POST",
    header: {},
    files: [{ filename: objectKey, name: "file", uri: sourceFile, type: "text/plain" }],
    data: [
      { name: "key", value: this.objectKey },
      { name: "AccessKeyId", value: this.ak },
      { name: "policy", value: result.Policy },
      { name: "signature", value: result.Signature },
      { name: "x-obs-acl", value: "public-read" },
    ],
  };
  try {
    request.uploadFile(getContext(), uploadConfig).then((data: request.UploadTask) => {
      uploadTask = data;

      uploadTask.on('progress',  (uploadedSize: number, totalSize: number) => {
        console.info('Upload delete progress notification.' + 'totalSize:' + totalSize + 'uploadedSize:' + uploadedSize);
      });
      let upCompleteCallback = (taskStates: Array<request.TaskState>) => {
        for (let i = 0; i < taskStates.length; i++) {
          console.info("upOnComplete taskState:" + JSON.stringify(taskStates[i]));
        }
      };
      uploadTask.on('complete', upCompleteCallback);

      let upFailCallback = (taskStates: Array<request.TaskState>) => {
        for (let i = 0; i < taskStates.length; i++) {
          console.info("upOnFail taskState:" + JSON.stringify(taskStates[i]));
        }
      };
      uploadTask.on('fail', upFailCallback);

    }).catch((err: BusinessError) => {
      console.error(`Failed to request the upload. Code: ${err.code}, message: ${err.message}`);
    });
  } catch (err) {
    console.error(`Failed to request the upload. err: ${JSON.stringify(err)}`);
  }
}

postObject();