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Merge pull request #3788 from InfinityPacer/feature/cache
feat(cache): optimize serialization with type-based caching
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@@ -218,6 +218,10 @@ class RedisBackend(CacheBackend):
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- Pickle 反序列化可能存在安全风险,需进一步重构调用来源,避免复杂对象缓存
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"""
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# 类型缓存集合,针对非容器简单类型
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_complex_serializable_types = set()
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_simple_serializable_types = set()
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def __init__(self, redis_url: str = "redis://localhost", ttl: int = 1800):
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"""
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初始化 Redis 缓存实例
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@@ -258,19 +262,42 @@ class RedisBackend(CacheBackend):
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logger.error(f"Failed to set Redis maxmemory or policy: {e}")
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@staticmethod
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def serialize(value: Any) -> bytes:
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def is_container_type(t):
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return t in (list, dict, tuple, set)
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@classmethod
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def serialize(cls, value: Any) -> bytes:
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"""
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将值序列化为二进制数据,根据序列化方式标识格式
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"""
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try:
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# 尝试 JSON 序列化
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return b"JSON" + b"\x00" + json.dumps(value).encode("utf-8")
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except TypeError:
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# 如果 JSON 序列化失败,使用 Pickle 序列化
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return b"PICKLE" + b"\x00" + pickle.dumps(value)
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vt = type(value)
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# 针对非容器类型使用缓存策略
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if not cls.is_container_type(vt):
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# 如果已知需要复杂序列化
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if vt in cls._complex_serializable_types:
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return b"PICKLE" + b"\x00" + pickle.dumps(value)
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# 如果已知可以简单序列化
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if vt in cls._simple_serializable_types:
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json_data = json.dumps(value).encode("utf-8")
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return b"JSON" + b"\x00" + json_data
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# 对于未知的非容器类型,尝试简单序列化,如抛出异常,再使用复杂序列化
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try:
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json_data = json.dumps(value).encode("utf-8")
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cls._simple_serializable_types.add(vt)
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return b"JSON" + b"\x00" + json_data
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except TypeError:
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cls._complex_serializable_types.add(vt)
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return b"PICKLE" + b"\x00" + pickle.dumps(value)
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# 针对容器类型,每次尝试简单序列化,不使用缓存
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else:
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try:
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json_data = json.dumps(value).encode("utf-8")
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return b"JSON" + b"\x00" + json_data
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except TypeError:
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return b"PICKLE" + b"\x00" + pickle.dumps(value)
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@staticmethod
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def deserialize(value: bytes) -> Any:
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@classmethod
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def deserialize(cls, value: bytes) -> Any:
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"""
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将二进制数据反序列化为原始值,根据格式标识区分序列化方式
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"""
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