diff --git a/app/core/cache.py b/app/core/cache.py
index 21bfd803..85f6e9bd 100644
--- a/app/core/cache.py
+++ b/app/core/cache.py
@@ -28,6 +28,49 @@ class CacheBackend(ABC):
     缓存后端基类，定义通用的缓存接口
     """
 
+    # Dict-like operations
+    def __getitem__(self, key: str) -> Any:
+        """
+        获取缓存项，类似 dict[key]
+        """
+        value = self.get(key)
+        if value is None:
+            raise KeyError(key)
+        return value
+
+    def __setitem__(self, key: str, value: Any) -> None:
+        """
+        设置缓存项，类似 dict[key] = value
+        """
+        self.set(key, value)
+
+    def __delitem__(self, key: str) -> None:
+        """
+        删除缓存项，类似 del dict[key]
+        """
+        if not self.exists(key):
+            raise KeyError(key)
+        self.delete(key)
+
+    def __contains__(self, key: str) -> bool:
+        """
+        检查键是否存在，类似 key in dict
+        """
+        return self.exists(key)
+
+    def __iter__(self):
+        """
+        返回缓存的迭代器，类似 iter(dict)
+        """
+        for key, _ in self.items():
+            yield key
+
+    def __len__(self) -> int:
+        """
+        返回缓存项的数量，类似 len(dict)
+        """
+        return sum(1 for _ in self.items())
+
     @abstractmethod
     def set(self, key: str, value: Any, ttl: Optional[int] = None,
             region: Optional[str] = DEFAULT_CACHE_REGION, **kwargs) -> None:
@@ -74,15 +117,6 @@ class CacheBackend(ABC):
         """
         pass
 
-    @abstractmethod
-    def clear(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> None:
-        """
-        清除指定区域的缓存或全部缓存
-
-        :param region: 缓存的区，为None时清空所有区缓存
-        """
-        pass
-
     @abstractmethod
     def items(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> Generator[Tuple[str, Any], None, None]:
         """
@@ -93,56 +127,6 @@ class CacheBackend(ABC):
         """
         pass
 
-    @abstractmethod
-    def close(self) -> None:
-        """
-        关闭缓存连接
-        """
-        pass
-
-    # Dict-like operations
-    def __getitem__(self, key: str) -> Any:
-        """
-        获取缓存项，类似 dict[key]
-        """
-        value = self.get(key)
-        if value is None:
-            raise KeyError(key)
-        return value
-
-    def __setitem__(self, key: str, value: Any) -> None:
-        """
-        设置缓存项，类似 dict[key] = value
-        """
-        self.set(key, value)
-
-    def __delitem__(self, key: str) -> None:
-        """
-        删除缓存项，类似 del dict[key]
-        """
-        if not self.exists(key):
-            raise KeyError(key)
-        self.delete(key)
-
-    def __contains__(self, key: str) -> bool:
-        """
-        检查键是否存在，类似 key in dict
-        """
-        return self.exists(key)
-
-    def __iter__(self):
-        """
-        返回缓存的迭代器，类似 iter(dict)
-        """
-        for key, _ in self.items():
-            yield key
-
-    def __len__(self) -> int:
-        """
-        返回缓存项的数量，类似 len(dict)
-        """
-        return sum(1 for _ in self.items())
-
     def keys(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> Generator[str, None, None]:
         """
         获取所有缓存键，类似 dict.keys()
@@ -157,7 +141,7 @@ class CacheBackend(ABC):
         for _, value in self.items(region=region):
             yield value
 
-    def update(self, other: Dict[str, Any], region: Optional[str] = DEFAULT_CACHE_REGION, 
+    def update(self, other: Dict[str, Any], region: Optional[str] = DEFAULT_CACHE_REGION,
                ttl: Optional[int] = None, **kwargs) -> None:
         """
         更新缓存，类似 dict.update()
@@ -199,13 +183,31 @@ class CacheBackend(ABC):
             return default
         return value
 
-    def get_region(self, region: Optional[str] = None) -> str:
+    @abstractmethod
+    def clear(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> None:
+        """
+        清除指定区域的缓存或全部缓存
+
+        :param region: 缓存的区，为None时清空所有区缓存
+        """
+        pass
+
+    @abstractmethod
+    def close(self) -> None:
+        """
+        关闭缓存连接
+        """
+        pass
+
+    @staticmethod
+    def get_region(region: Optional[str] = None) -> str:
         """
         获取缓存的区
         """
         return f"region:{region}" if region else "region:default"
 
-    def get_cache_key(self, func, args, kwargs) -> str:
+    @staticmethod
+    def get_cache_key(func, args, kwargs) -> str:
         """
         根据函数和参数生成缓存键
 
@@ -229,14 +231,15 @@ class CacheBackend(ABC):
         # 使用有序参数生成缓存键
         return f"{func.__name__}_{hashkey(*keys)}"
 
-    def is_redis(self) -> bool:
+    @staticmethod
+    def is_redis() -> bool:
         """
         判断当前缓存后端是否为 Redis
         """
-        return isinstance(self, RedisBackend) or isinstance(self, AsyncRedisBackend)
+        return settings.CACHE_BACKEND_TYPE == "redis"
 
 
-class AsyncCacheBackend(ABC):
+class AsyncCacheBackend(CacheBackend):
     """
     缓存后端基类，定义通用的缓存接口（异步）
     """
@@ -313,67 +316,21 @@ class AsyncCacheBackend(ABC):
         """
         pass
 
-    # Async dict-like operations
-    async def __getitem__(self, key: str) -> Any:
-        """
-        获取缓存项，类似 dict[key]（异步）
-        """
-        value = await self.get(key)
-        if value is None:
-            raise KeyError(key)
-        return value
-
-    async def __setitem__(self, key: str, value: Any) -> None:
-        """
-        设置缓存项，类似 dict[key] = value（异步）
-        """
-        await self.set(key, value)
-
-    async def __delitem__(self, key: str) -> None:
-        """
-        删除缓存项，类似 del dict[key]（异步）
-        """
-        if not await self.exists(key):
-            raise KeyError(key)
-        await self.delete(key)
-
-    async def __contains__(self, key: str) -> bool:
-        """
-        检查键是否存在，类似 key in dict（异步）
-        """
-        return await self.exists(key)
-
-    async def __aiter__(self):
-        """
-        返回缓存的异步迭代器，类似 aiter(dict)
-        """
-        async for key, _ in self.items():
-            yield key
-
-    async def __len__(self) -> int:
-        """
-        返回缓存项的数量，类似 len(dict)（异步）
-        """
-        count = 0
-        async for _ in self.items():
-            count += 1
-        return count
-
     async def keys(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> AsyncGenerator[str, None]:
         """
         获取所有缓存键，类似 dict.keys()（异步）
         """
-        async for key, _ in self.items(region=region):
+        async for key, _ in await self.items(region=region):
             yield key
 
     async def values(self, region: Optional[str] = DEFAULT_CACHE_REGION) -> AsyncGenerator[Any, None]:
         """
         获取所有缓存值，类似 dict.values()（异步）
         """
-        async for _, value in self.items(region=region):
+        async for _, value in await self.items(region=region):
             yield value
 
-    async def update(self, other: Dict[str, Any], region: Optional[str] = DEFAULT_CACHE_REGION, 
+    async def update(self, other: Dict[str, Any], region: Optional[str] = DEFAULT_CACHE_REGION,
                      ttl: Optional[int] = None, **kwargs) -> None:
         """
         更新缓存，类似 dict.update()（异步）
@@ -398,7 +355,7 @@ class AsyncCacheBackend(ABC):
         弹出最后一个缓存项，类似 dict.popitem()（异步）
         """
         items = []
-        async for item in self.items(region=region):
+        async for item in await self.items(region=region):
             items.append(item)
         if not items:
             raise KeyError("popitem(): cache is empty")
@@ -417,42 +374,6 @@ class AsyncCacheBackend(ABC):
             return default
         return value
 
-    def get_region(self, region: Optional[str] = None) -> str:
-        """
-        获取缓存的区
-        """
-        return f"region:{region}" if region else "region:default"
-
-    def get_cache_key(self, func, args, kwargs) -> str:
-        """
-        根据函数和参数生成缓存键
-
-        :param func: 函数对象
-        :param args: 位置参数
-        :param kwargs: 关键字参数
-        :return: 缓存键
-        """
-        signature = inspect.signature(func)
-        # 绑定传入的参数并应用默认值
-        bound = signature.bind(*args, **kwargs)
-        bound.apply_defaults()
-        # 忽略第一个参数，如果它是实例(self)或类(cls)
-        parameters = list(signature.parameters.keys())
-        if parameters and parameters[0] in ("self", "cls"):
-            bound.arguments.pop(parameters[0], None)
-        # 按照函数签名顺序提取参数值列表
-        keys = [
-            bound.arguments[param] for param in signature.parameters if param in bound.arguments
-        ]
-        # 使用有序参数生成缓存键
-        return f"{func.__name__}_{hashkey(*keys)}"
-
-    def is_redis(self) -> bool:
-        """
-        判断当前缓存后端是否为 Redis
-        """
-        return isinstance(self, RedisBackend) or isinstance(self, AsyncRedisBackend)
-
 
 class MemoryBackend(CacheBackend):
     """
@@ -1005,84 +926,6 @@ def Cache(maxsize: Optional[int] = None, ttl: Optional[int] = None) -> CacheBack
         return MemoryBackend(maxsize=maxsize, ttl=ttl)
 
 
-class TTLCache:
-    """
-    TTL缓存类，现在只是一个简单的包装器，建议直接使用Cache类
-    
-    注意：此类已过时，建议直接使用Cache类，它提供了完整的dict操作特性
-    """
-
-    def __init__(self, region: Optional[str] = DEFAULT_CACHE_REGION,
-                 maxsize: int = None, ttl: int = None):
-        """
-        初始化TTL缓存
-
-        :param region: 缓存的区，默认为 DEFAULT_CACHE_REGION
-        :param maxsize: 缓存的最大条目数
-        :param ttl: 缓存的存活时间，单位秒
-        """
-        self.region = region
-        self.maxsize = maxsize
-        self.ttl = ttl
-        self._backend = Cache(maxsize=maxsize, ttl=ttl)
-
-    def set(self, key: str, value: Any, ttl: Optional[int] = None):
-        """
-        设置缓存项，支持自定义 TTL
-        """
-        try:
-            ttl = ttl or self.ttl
-            self._backend.set(key, value, ttl=ttl, region=self.region)
-        except Exception as e:
-            logger.warning(f"缓存设置失败: {e}")
-
-    def get(self, key: str, default: Any = None):
-        """
-        获取缓存项，如果不存在返回默认值
-        """
-        try:
-            value = self._backend.get(key, region=self.region)
-            if value is not None:
-                return value
-        except Exception as e:
-            logger.warning(f"缓存获取失败: {e}")
-
-        return default
-
-    def delete(self, key: str):
-        """
-        删除缓存项
-        """
-        try:
-            self._backend.delete(key, region=self.region)
-        except Exception as e:
-            logger.warning(f"缓存删除失败: {e}")
-
-    def clear(self):
-        """
-        清空缓存
-        """
-        try:
-            self._backend.clear(region=self.region)
-        except Exception as e:
-            logger.warning(f"缓存清空失败: {e}")
-
-    def is_redis(self) -> bool:
-        """
-        判断当前缓存后端是否为 Redis
-        """
-        return self._backend.is_redis()
-
-    def close(self):
-        """
-        关闭缓存连接
-        """
-        try:
-            self._backend.close()
-        except Exception as e:
-            logger.warning(f"缓存关闭失败: {e}")
-
-
 def cached(region: Optional[str] = None, maxsize: Optional[int] = 1024, ttl: Optional[int] = None,
            skip_none: Optional[bool] = True, skip_empty: Optional[bool] = False):
     """
diff --git a/app/helper/torrent.py b/app/helper/torrent.py
index 8989f2ca..4b4d372f 100644
--- a/app/helper/torrent.py
+++ b/app/helper/torrent.py
@@ -16,11 +16,10 @@ from app.db.systemconfig_oper import SystemConfigOper
 from app.log import logger
 from app.schemas.types import MediaType, SystemConfigKey
 from app.utils.http import RequestUtils
-from app.utils.singleton import WeakSingleton
 from app.utils.string import StringUtils
 
 
-class TorrentHelper(metaclass=WeakSingleton):
+class TorrentHelper:
     """
     种子帮助类
     """
@@ -199,17 +198,14 @@ class TorrentHelper(metaclass=WeakSingleton):
         :param torrent_content: 种子内容
         :return: 文件夹名、文件清单，单文件种子返回空文件夹名
         """
+
         if not torrent_content:
             return "", []
-        
+
         # 检查是否为磁力链接
-        if isinstance(torrent_content, str) and torrent_content.startswith("magnet:"):
-            # 磁力链接无法预先获取文件信息，返回空
+        if StringUtils.is_magnet_link(torrent_content):
             return "", []
-        elif isinstance(torrent_content, bytes) and torrent_content.startswith(b"magnet:"):
-            # 磁力链接无法预先获取文件信息，返回空
-            return "", []
-        
+
         try:
             # 解析种子内容
             torrentinfo = Torrent.from_string(torrent_content)
diff --git a/app/modules/qbittorrent/__init__.py b/app/modules/qbittorrent/__init__.py
index f018541d..ac568a1f 100644
--- a/app/modules/qbittorrent/__init__.py
+++ b/app/modules/qbittorrent/__init__.py
@@ -118,23 +118,17 @@ class QbittorrentModule(_ModuleBase, _DownloaderBase[Qbittorrent]):
                     if content.exists():
                         torrent_content = content.read_bytes()
                     else:
-                        # 缓存处理器
-                        cache_backend = FileCache()
                         # 读取缓存的种子文件
-                        torrent_content = cache_backend.get(content.as_posix(), region="torrents")
+                        torrent_content = FileCache().get(content.as_posix(), region="torrents")
                 else:
                     torrent_content = content
 
-                # 检查是否为磁力链接
-                if isinstance(torrent_content, str) and torrent_content.startswith("magnet:"):
-                    # 磁力链接不需要解析种子文件
-                    return None, torrent_content
-                elif isinstance(torrent_content, bytes) and torrent_content.startswith(b"magnet:"):
-                    # 磁力链接不需要解析种子文件
-                    return None, torrent_content
-
                 if torrent_content:
-                    torrent_info = Torrent.from_string(torrent_content)
+                    # 检查是否为磁力链接
+                    if StringUtils.is_magnet_link(torrent_content):
+                        return None, torrent_content
+                    else:
+                        torrent_info = Torrent.from_string(torrent_content)
 
                 return torrent_info, torrent_content
             except Exception as e:
@@ -147,7 +141,9 @@ class QbittorrentModule(_ModuleBase, _DownloaderBase[Qbittorrent]):
         # 读取种子的名称
         torrent, content = __get_torrent_info()
         # 检查是否为磁力链接
-        is_magnet = isinstance(content, str) and content.startswith("magnet:") or isinstance(content, bytes) and content.startswith(b"magnet:")
+        is_magnet = isinstance(content, str) and content.startswith("magnet:") or isinstance(content,
+                                                                                             bytes) and content.startswith(
+            b"magnet:")
         if not torrent and not is_magnet:
             return None, None, None, f"添加种子任务失败：无法读取种子文件"
 
diff --git a/app/modules/transmission/__init__.py b/app/modules/transmission/__init__.py
index 9b5fd654..5294fae6 100644
--- a/app/modules/transmission/__init__.py
+++ b/app/modules/transmission/__init__.py
@@ -119,23 +119,17 @@ class TransmissionModule(_ModuleBase, _DownloaderBase[Transmission]):
                     if content.exists():
                         torrent_content = content.read_bytes()
                     else:
-                        # 缓存处理器
-                        cache_backend = FileCache()
                         # 读取缓存的种子文件
-                        torrent_content = cache_backend.get(content.as_posix(), region="torrents")
+                        torrent_content = FileCache().get(content.as_posix(), region="torrents")
                 else:
                     torrent_content = content
 
-                # 检查是否为磁力链接
-                if isinstance(torrent_content, str) and torrent_content.startswith("magnet:"):
-                    # 磁力链接不需要解析种子文件
-                    return None, torrent_content
-                elif isinstance(torrent_content, bytes) and torrent_content.startswith(b"magnet:"):
-                    # 磁力链接不需要解析种子文件
-                    return None, torrent_content
-
                 if torrent_content:
-                    torrent_info = Torrent.from_string(torrent_content)
+                    # 检查是否为磁力链接
+                    if StringUtils.is_magnet_link(torrent_content):
+                        return None, torrent_content
+                    else:
+                        torrent_info = Torrent.from_string(torrent_content)
 
                 return torrent_info, torrent_content
             except Exception as e:
@@ -148,7 +142,9 @@ class TransmissionModule(_ModuleBase, _DownloaderBase[Transmission]):
         # 读取种子的名称
         torrent, content = __get_torrent_info()
         # 检查是否为磁力链接
-        is_magnet = isinstance(content, str) and content.startswith("magnet:") or isinstance(content, bytes) and content.startswith(b"magnet:")
+        is_magnet = isinstance(content, str) and content.startswith("magnet:") or isinstance(content,
+                                                                                             bytes) and content.startswith(
+            b"magnet:")
         if not torrent and not is_magnet:
             return None, None, None, f"添加种子任务失败：无法读取种子文件"
 
diff --git a/app/utils/string.py b/app/utils/string.py
index 4adf193c..353f807c 100644
--- a/app/utils/string.py
+++ b/app/utils/string.py
@@ -229,7 +229,7 @@ class StringUtils:
                 size = float(size)
                 d = [(1024 - 1, 'K'), (1024 ** 2 - 1, 'M'), (1024 ** 3 - 1, 'G'), (1024 ** 4 - 1, 'T')]
                 s = [x[0] for x in d]
-                index = bisect.bisect_left(s, size) - 1 # noqa
+                index = bisect.bisect_left(s, size) - 1  # noqa
                 if index == -1:
                     return str(size) + "B"
                 else:
@@ -925,3 +925,16 @@ class StringUtils:
         if re.match(r'^[a-zA-Z0-9.-]+(\.[a-zA-Z]{2,})?$', text):
             return True
         return False
+
+    @staticmethod
+    def is_magnet_link(content: Union[str, bytes]) -> bool:
+        """
+        判断内容是否为磁力链接
+        """
+        if not content:
+            return False
+        if isinstance(content, str) and content.startswith("magnet:"):
+            return True
+        if isinstance(content, bytes) and content.startswith(b"magnet:"):
+            return True
+        return False