add:支持使用阿里云OSS进行对象存储服务

fix:删除utils中未使用的第三方库chardet

storage.py

@@ -3,10 +3,58 @@ import asyncio
 from datetime import datetime
 from pathlib import Path
 from typing import BinaryIO
-
 from fastapi import UploadFile
-
 import settings
+import oss2
+
+
+class AliyunFileStore:
+    auth = oss2.Auth(settings.KeyId, settings.KeySecret)
+    bucket = oss2.Bucket(auth, settings.OSS_ENDPOINT, settings.BUCKET_NAME)
+
+    def upload_file(self, upload_filepath, remote_filepath):
+        self.bucket.put_object_from_file(remote_filepath, upload_filepath)
+
+    async def get_text(self, file: UploadFile, key: str):
+        ext = file.filename.split('.')[-1]
+        now = datetime.now()
+        path = f"FileCodeBox/upload/{now.year}/{now.month}/{now.day}"
+        text = f"{path}/{f'{key}.{ext}'}"
+        return text
+
+    async def get_filepath(self, text: str):
+        return text
+
+    @staticmethod
+    async def get_size(file: UploadFile):
+        f = file.file
+        f.seek(0, os.SEEK_END)
+        size = f.tell()
+        f.seek(0, os.SEEK_SET)
+        return size
+
+    @staticmethod
+    def _save(filepath, file: BinaryIO):
+        with open(filepath, 'wb') as f:
+            chunk_size = 256 * 1024
+            chunk = file.read(chunk_size)
+            while chunk:
+                f.write(chunk)
+                chunk = file.read(chunk_size)
+
+    async def save_file(self, file: UploadFile, remote_filepath: str):
+        now = int(datetime.now().timestamp())
+        upload_filepath = settings.DATA_ROOT+str(now)
+        await asyncio.to_thread(self._save, upload_filepath, file.file)
+        self.upload_file(upload_filepath,remote_filepath)
+        await asyncio.to_thread(os.remove,upload_filepath)
+
+    async def delete_files(self, texts):
+        tasks = [self.delete_file(text) for text in texts]
+        await asyncio.gather(*tasks)
+
+    async def delete_file(self, text: str):
+        self.bucket.delete_object(text)
 
 
 class FileSystemStorage:
@@ -68,5 +116,6 @@ class FileSystemStorage:
 
 
 STORAGE_ENGINE = {
-    "filesystem": FileSystemStorage
+    "filesystem": FileSystemStorage,
+    "aliyunsystem": AliyunFileStore
 }