node.js - 获取 Azure Blob 存储中可用元素数量的总文件大小

Question

我正在尝试获取容器内每个用户可用的文件的总大小。我正在使用 map 函数进行迭代，当我尝试控制台记录值时，它会正确显示它们，但在 map 函数完成后它会给出 0。任何帮助将不胜感激。

const connString: string = process.env.AZURE_STORAGE_CONNECTION_STRING!;

const blobServiceClient = BlobServiceClient.fromConnectionString(
  connString
);

const containerClient = blobServiceClient.getContainerClient("mycontainer");

 try {
      let userId = req.params["user_id"];
      let storageInfo: any = await AddToHiveModel.find({ user_id: userId });
      let storageInfoTotal: number = 0;

      console.log(storageInfo.length);
      await AddToHiveModel.find({ user_id: userId }).then((result:any)=> {
        if(result.length > 0){
          result.map( async (element: any) => {
            let blobName = `uploads/${element.user_id}/${element.filename}`;
            await containerClient.getBlobClient(blobName).getProperties()
              .then(
                (result: any) => {
                  storageInfoTotal += Number(result.contentLength);
                })
              .catch((err: any) => {
                return err;
              });
            
            return null;
  
          }
          );
          console.log(storageInfoTotal);
          resp.json(storageInfoTotal);
        }else {
          resp.json(storageInfoTotal);
        }
      });

    } catch (err) {
      console.error("Caught error", err);
      resp.status(500).send(err);
      resp.end();
    }

Answer 1

尝试获取 blob 的属性。

var blob = _container.GetBlockBlobReference(blobName);
if (blob.Exists())
{
    blob.FetchAttributes();
    return blob.Properties.Length;
}

throw new Exception("Blob doesn't exist");

尝试使用此代码来确定 blob 的大小:

val blob: CloudBlockBlob = container.getBlockBlobReference(blobPath)
blob.downloadAttributes()
blob.getProperties.getLength

为避免属性为空，请确保调用 downloadAttributes。

引用文献:

1. Calculate blob count and total size per container using Azure Storage inventory
2. Calculate the size/capacity of storage account and it services
3. CloudBlockBlob Class