JavaScript Azure Blob存储移动blob

Question

我有一个存储后端，它使用微软官方的blob存储库(@azure/ NodeJS - Blob )来管理我的Blob存储：

https://www.npmjs.com/package/@azure/storage-blob

有必要将blob从一个文件夹移动到另一个文件夹。不幸的是，我找不到任何关于这方面的文档。

到目前为止，我所做的是：

const { BlobServiceClient } = require("@azure/storage-blob");

const blobServiceClient = BlobServiceClient.fromConnectionString(process.env.storageconnection);
const containerClient = blobServiceClient.getContainerClient('import');
const blobClient = containerClient.getBlobClient('toImport/' + req.body.file);
const downloadBlockBlobResponse = await blobClient.download();
... do some stuff with the value of the files

正如您在代码中看到的，我从文件夹"toImport“中读取了一个文件。之后，我想移动文件到另一个文件夹“完成”。这有可能吗？也许我需要创建该文件的副本并删除旧文件？

Answer 1

因此，Azure Blob存储中不支持移动操作。您需要做的是将blob从源复制到目标，监视复制进度(因为复制操作是异步的)，并在复制完成后删除blob。

对于复制，您希望使用的方法是beginCopyFromURL(string, BlobBeginCopyFromURLOptions)。

请看下面的代码：

const { BlobServiceClient } = require("@azure/storage-blob");

const connectionString = "DefaultEndpointsProtocol=https;AccountName=account-name;AccountKey=account-key;EndpointSuffix=core.windows.net";
const container = "container-name";
const sourceFolder = "source";
const targetFolder = "target";
const blobName = "blob.png";

async function moveBlob() {
  const blobServiceClient = BlobServiceClient.fromConnectionString(connectionString);
  const containerClient = blobServiceClient.getContainerClient(container);
  const sourceBlobClient = containerClient.getBlobClient(`${sourceFolder}/${blobName}`);
  const targetBlobClient = containerClient.getBlobClient(`${targetFolder}/${blobName}`);
  console.log('Copying source blob to target blob...');
  const copyResult = await targetBlobClient.beginCopyFromURL(sourceBlobClient.url);
  console.log('Blob copy operation started successfully...');
  console.log(copyResult);
  do {
    console.log('Checking copy status...')
    const blobCopiedSuccessfully = await checkIfBlobCopiedSuccessfully(targetBlobClient);
    if (blobCopiedSuccessfully) {
      break;
    }
  } while (true);
  console.log('Now deleting source blob...');
  await sourceBlobClient.delete();
  console.log('Source blob deleted successfully....');
  console.log('Move operation complete.');
}

async function checkIfBlobCopiedSuccessfully(targetBlobClient) {
  const blobPropertiesResult = await targetBlobClient.getProperties();
  const copyStatus = blobPropertiesResult.copyStatus;
  return copyStatus === 'success';
}

moveBlob();