Python：如何将 Azure Blob 从一个容器移动或复制到另一个容器

Question

我在项目中使用Microsoft Azure SDK for Python。我想将 Blob 从一个容器移动或复制到另一个容器。例如

https://demostorage.blob.core.windows.net/image-container/pretty.jpg

我想将此 blob 移动到

https://demostorage.blob.core.windows.net/demo-container/

我在python SDK中找到了以下方法但无法理解。

def copy_blob(self, container_name, blob_name,...):

我该怎么做？谢谢

Answer 1

我是这样做的。

from azure.storage.blob import BlobService

def copy_azure_files(self):

        blob_service = BlobService(account_name='account_name', account_key='account_key')
        blob_name = 'pretty.jpg'
        copy_from_container = 'image-container'
        copy_to_container = 'demo-container'

        blob_url = blob_service.make_blob_url(copy_from_container, blob_name)
        # blob_url:https://demostorage.blob.core.windows.net/image-container/pretty.jpg

        blob_service.copy_blob(copy_to_container, blob_name, blob_url)

        #for move the file use this line
        blob_service.delete_blob(copy_from_container, blob_name)

我还没有找到任何 Blob Move 方法。所以我使用了复制方法，然后执行 Blob 函数。

这是我的解决方案。如果您有更好的方法来处理这一切，请与我分享。

注意：我没有使用任何自定义方法，所有这些方法都包含在 SDK 中。

Answer 2

使用当前版本的 azure-storage-blob（目前为 v12.3.2），您将收到 ImportError：

cannot import name 'BlockBlobService' from 'azure.storage.blob'

此代码适用于我的情况：

from azure.storage.blob import BlobServiceClient

# Azure
# Get this from Settings/Access keys in your Storage account on Azure portal
account_name = "YOUR_AZURE_ACCOUNT_NAME"
connection_string = "YOUR_AZURE_CONNECTION_STRING"

# Source
source_container_name = "sourcecontainer"
source_file_path = "soure.jpg"
blob_service_client = BlobServiceClient.from_connection_string(connection_string)
source_blob = (f"https://{account_name}.blob.core.windows.net/{source_container_name}/{source_file_path}")

# Target
target_container_name = "targetcontainer"
target_file_path = "target.jpg"
copied_blob = blob_service_client.get_blob_client(target_container_name, target_file_path)
copied_blob.start_copy_from_url(source_blob)

# If you would like to delete the source file
remove_blob = blob_service_client.get_blob_client(source_container_name, source_file_path)
remove_blob.delete_blob()

Answer 3

使用最新的Azure Blob Storage SDK。

from azure.storage.blob import BlockBlobService

account_name = "demostorage"
account_key = "lkjASDRwelriJfou3lkjksdfjLj349u9LJfasdjfs/dlkjfjLKSjdfi8ulksjdfAlkjsdfkL762FDSDFSDAfju==" 

source_container_name = "image-container"
source_file_path = "pretty.jpg"

target_container_name = "demo-container"
target_file_path = "pretty_copy.jpg"

service = BlockBlobService(account_name, account_key)

service.copy_blob(
    target_container_name, 
    target_file_path, 
    f"https://{account_name}.blob.core.windows.net/{source_container_name}/{source_file_path}",
)

Answer 4

sdk 版本 12.0.0b，他们将 copy_blob 更改为 start_copy_from_url。方法大家可以看here

这是一个关于如何在不下载数据的情况下执行移动机制的快照。

    from azure.storage.blob import BlobServiceClient

    blob_service_client = BlobServiceClient.from_connection_string(
            os.getenv("AZURE_STORAGE_CONNECTION_STRING")
        ).get_container_client(self.container)

    # azure storage sdk does not have _move method
    source_blob = blob_service_client.get_blob_client(source_blob_path)
    dest_blob = blob_service_client.get_blob_client(dest_blob_path)

    dest_blob.start_copy_from_url(source_blob.url, requires_sync=True)
    copy_properties = dest_blob.get_blob_properties().copy

    if copy_properties.status != "success":
        dest_blob.abort_copy(copy_properties.id)
        raise Exception(
            f"Unable to copy blob %s with status %s"
            % (source_blob_path, copy_properties.status)
        )
    source_blob.delete_blob()