init

services/cache.py

@@ -2,6 +2,11 @@ from __future__ import annotations
 
 from typing import Optional
 
+try:
+    import redis
+except Exception:
+    redis = None
+
 
 class CacheBase:
     """缓存接口"""
@@ -23,3 +28,18 @@ class NoopCache(CacheBase):
         return None
 
 
+class RedisCache(CacheBase):
+    """Redis 缓存实现"""
+
+    def __init__(self, url: str, db: int = 0):
+        if redis is None:
+            raise ImportError("未安装 redis 依赖")
+        self._client = redis.Redis.from_url(url, db=db, decode_responses=True)
+
+    def get(self, key: str) -> Optional[str]:
+        return self._client.get(key)
+
+    def set(self, key: str, value: str, ttl: int) -> None:
+        self._client.set(key, value, ex=ttl)
+
+