mirror of
https://github.com/langgenius/dify.git
synced 2025-11-04 12:53:38 +00:00
85 lines
3.4 KiB
Python
85 lines
3.4 KiB
Python
from collections.abc import Generator
|
|
from datetime import UTC, datetime, timedelta
|
|
from typing import Optional
|
|
|
|
from azure.identity import ChainedTokenCredential, DefaultAzureCredential
|
|
from azure.storage.blob import AccountSasPermissions, BlobServiceClient, ResourceTypes, generate_account_sas
|
|
|
|
from configs import dify_config
|
|
from extensions.ext_redis import redis_client
|
|
from extensions.storage.base_storage import BaseStorage
|
|
|
|
|
|
class AzureBlobStorage(BaseStorage):
|
|
"""Implementation for Azure Blob storage."""
|
|
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.bucket_name = dify_config.AZURE_BLOB_CONTAINER_NAME
|
|
self.account_url = dify_config.AZURE_BLOB_ACCOUNT_URL
|
|
self.account_name = dify_config.AZURE_BLOB_ACCOUNT_NAME
|
|
self.account_key = dify_config.AZURE_BLOB_ACCOUNT_KEY
|
|
|
|
self.credential: Optional[ChainedTokenCredential] = None
|
|
if self.account_key == "managedidentity":
|
|
self.credential = DefaultAzureCredential()
|
|
else:
|
|
self.credential = None
|
|
|
|
def save(self, filename, data):
|
|
client = self._sync_client()
|
|
blob_container = client.get_container_client(container=self.bucket_name)
|
|
blob_container.upload_blob(filename, data)
|
|
|
|
def load_once(self, filename: str) -> bytes:
|
|
client = self._sync_client()
|
|
blob = client.get_container_client(container=self.bucket_name)
|
|
blob = blob.get_blob_client(blob=filename)
|
|
data: bytes = blob.download_blob().readall()
|
|
return data
|
|
|
|
def load_stream(self, filename: str) -> Generator:
|
|
client = self._sync_client()
|
|
blob = client.get_blob_client(container=self.bucket_name, blob=filename)
|
|
blob_data = blob.download_blob()
|
|
yield from blob_data.chunks()
|
|
|
|
def download(self, filename, target_filepath):
|
|
client = self._sync_client()
|
|
|
|
blob = client.get_blob_client(container=self.bucket_name, blob=filename)
|
|
with open(target_filepath, "wb") as my_blob:
|
|
blob_data = blob.download_blob()
|
|
blob_data.readinto(my_blob)
|
|
|
|
def exists(self, filename):
|
|
client = self._sync_client()
|
|
|
|
blob = client.get_blob_client(container=self.bucket_name, blob=filename)
|
|
return blob.exists()
|
|
|
|
def delete(self, filename):
|
|
client = self._sync_client()
|
|
|
|
blob_container = client.get_container_client(container=self.bucket_name)
|
|
blob_container.delete_blob(filename)
|
|
|
|
def _sync_client(self):
|
|
if self.account_key == "managedidentity":
|
|
return BlobServiceClient(account_url=self.account_url, credential=self.credential) # type: ignore
|
|
|
|
cache_key = "azure_blob_sas_token_{}_{}".format(self.account_name, self.account_key)
|
|
cache_result = redis_client.get(cache_key)
|
|
if cache_result is not None:
|
|
sas_token = cache_result.decode("utf-8")
|
|
else:
|
|
sas_token = generate_account_sas(
|
|
account_name=self.account_name or "",
|
|
account_key=self.account_key or "",
|
|
resource_types=ResourceTypes(service=True, container=True, object=True),
|
|
permission=AccountSasPermissions(read=True, write=True, delete=True, list=True, add=True, create=True),
|
|
expiry=datetime.now(UTC).replace(tzinfo=None) + timedelta(hours=1),
|
|
)
|
|
redis_client.set(cache_key, sas_token, ex=3000)
|
|
return BlobServiceClient(account_url=self.account_url or "", credential=sas_token)
|