Revert "fix: Optimize session expiration"

This reverts commit e1ede580942c1f3d6915a6cec6825a82d094e8eb.

common/expired_dict.py

@@ -1,50 +1,28 @@
 import time
-from collections import OrderedDict
 
 
-class ExpiredDict(OrderedDict):
+class ExpiredDict(dict):
     def __init__(self, expires_in_seconds):
         super().__init__()
-        # 存储键值对的生存时间
         self.expires_in_seconds = expires_in_seconds
-        # 获取当前时间的函数
-        self.now = time.monotonic
 
     def __getitem__(self, key):
-        # 检查键是否存在
-        if key not in self:
-            raise KeyError(key)
-        # 获取值和过期时间
-        value, expiry_time = self[key]
-        # 如果过期时间早于当前时间，删除该键值对并引发 KeyError
-        if expiry_time is not None and self.now() > expiry_time:
+        value, expiry_time = super().__getitem__(key)
+        # 如果元素已过期，则从字典中删除该元素并抛出 KeyError 异常
+        if time.monotonic() > expiry_time:
             del self[key]
-            raise KeyError(key)
-        # 如果存活时间不为 None，更新该键值对的过期时间
-        if self.expires_in_seconds is not None:
-            self[key] = value, self.now() + self.expires_in_seconds
-        # 删除过期的键值对
-        self._delete_expired_items()
-        # 返回值
+            raise KeyError("expired {}".format(key))
         return value
 
     def __setitem__(self, key, value):
-        # 如果存活时间不为 None，设置该键值对的过期时间
-        if self.expires_in_seconds is not None:
-            self[key] = value, self.now() + self.expires_in_seconds
+        # 如果元素已存在，则不需要重新计算过期时间
+        if key in self:
+            super().__setitem__(key, (value, self[key][1]))
         else:
-            self[key] = value, None
-        # 删除过期的键值对
-        self._delete_expired_items()
+            super().__setitem__(key, (value, time.monotonic() + self.expires_in_seconds))
 
     def get(self, key, default=None):
         try:
             return self[key]
         except KeyError:
             return default
-
-    def _delete_expired_items(self):
-        # 遍历所有键值对，删除过期的键值对
-        for key, (value, expiry_time) in list(self.items()):
-            if expiry_time is not None and self.now() > expiry_time:
-                del self[key]