python - 从远程 URL 将 Azure Blob 复制为 BlockBlob

Question

我正在使用azure-sdk-for-python BlobClient start_copy_from_url 将远程文件复制到本地存储。

但是，文件最终总是作为 AppendBlob 而不是 BlockBlob。我不明白如何强制目标 BlockType 为 BlockBlob。

connection_string = "connection string to my dest blob storage account"
container_name = "myContainerName"
dest_file_name = "myDestFile.csv"
remote_blob_url = "http://path/to/remote/blobfile.csv"

client = BlobServiceClient.from_connection_string(connection_string)
dest_blob = client.get_blob_client(container_name, dest_file_name)
dest_blob.start_copy_from_url(remote_blob_url)

Answer 1

一旦创建 blob 类型，就无法更改它。请参阅 Copy Blob From URL REST API ，没有 blob-types header 。

您可以引用我的代码从附加 blob 创建 block blob:

from azure.storage.blob import BlobPermissions
from datetime import datetime, timedelta
from azure.storage.blob import BlockBlobService
import requests
from io import BytesIO

account_name = "***"
account_key = "***"
container_name = "test"
blob_name = "test2.csv"

block_blob_service = BlockBlobService(account_name, account_key)

sas_token = block_blob_service.generate_blob_shared_access_signature(container_name, blob_name,
                                                                     permission=BlobPermissions.READ,
                                                                     expiry=datetime.utcnow() + timedelta(hours=1))
blob_url_with_sas = block_blob_service.make_blob_url(container_name, blob_name, sas_token=sas_token)

r = requests.get(blob_url_with_sas, stream=True)
block_blob_service.create_blob_from_stream("test", "jay.block", stream=BytesIO(r.content))