如何检查Azure上现有blob(文件)的字节数(大小)

Question

我找不到一个合适的例子来说明如何使用最新版本的AzureBlobClient来获取现有blob的字节计数。

这是我到目前为止正在使用的代码。我不知道如何过滤我需要找到的斑点。我可以把它们都弄来，但要花很长时间。

protected BlobContainerClient AzureBlobContainer
{
get
{
if (!isConfigurationLoaded) { throw new Exception("AzureCloud currently has no configuration loaded"); }
if (_azureBlobContainer == null)
{
if (!string.IsNullOrEmpty(_configuration.StorageEndpointConnection))
{
BlobServiceClient blobClient = new BlobServiceClient(_configuration.StorageEndpointConnection);
BlobContainerClient container = blobClient.GetBlobContainerClient(_configuration.StorageContainer);
container.CreateIfNotExists();
_azureBlobContainer = container;
}
}
return _azureBlobContainer;
}
}
public async Task<Response<BlobProperties>> GetAzureFileSize(string fileName)
{
BlobClient cloudFile = AzureBlobContainer.GetBlobClient(fileName);
await foreach (BlobItem blobItem in AzureBlobContainer.GetBlobsAsync())
{
Console.WriteLine("t" + blobItem.Name);
}
// Am i supposed to just iterate every single blob on there? how do I filter?

return blobProps;
}

想法吗?

Answer 1

最后是这样做的…我知道这不是正确的方法，但它有效。

public async Task<(BlobClient cloudFile, CopyFromUriOperation result)> MigrateFileToAzureBlobAsync(Uri url, string fileName, long? bytesCount)
{
BlobClient cloudFile = AzureBlobContainer.GetBlobClient(fileName);
cloudFile.DeleteIfExists();

BlobCopyFromUriOptions options = new BlobCopyFromUriOptions();
options.Metadata = new Dictionary<string, string>();
options.Metadata.Add("confexbytecount", bytesCount.ToString());
CopyFromUriOperation result = await cloudFile.StartCopyFromUriAsync(url, options);
Response x = await result.UpdateStatusAsync();
await result.WaitForCompletionAsync();

return (cloudFile, result);
}
public async Task<long> GetAzureFileSize(string fileName)
{
long retVal = 0;
await foreach (BlobItem blobItem in AzureBlobContainer.GetBlobsAsync(BlobTraits.All, BlobStates.All, fileName))
{
if (blobItem.Metadata.TryGetValue("confexbytecount", out string confexByteCount))
{
long.TryParse(confexByteCount, out retVal);
}
}
return retVal;
}