fix:修复音频代理缓存报错

app/dependencies/database.py

@@ -39,6 +39,9 @@ engine = create_async_engine(
 # Redis 连接
 redis_client = redis.from_url(settings.redis_url, decode_responses=True)
 
+# Redis 二进制数据连接 (不自动解码响应，用于存储音频等二进制数据)
+redis_binary_client = redis.from_url(settings.redis_url, decode_responses=False)
+
 # Redis 消息缓存连接 (db1) - 使用同步客户端在线程池中执行
 redis_message_client = sync_redis.from_url(settings.redis_url, decode_responses=True, db=1)
 
@@ -82,6 +85,11 @@ def get_redis():
     return redis_client
 
 
+def get_redis_binary():
+    """获取二进制数据专用的 Redis 客户端 (不自动解码响应)"""
+    return redis_binary_client
+
+
 def get_redis_message():
     """获取消息专用的 Redis 客户端 (db1)"""
     return redis_message_client

app/router/private/audio_proxy.py

@@ -7,7 +7,7 @@ from __future__ import annotations
 
 from typing import Annotated
 
-from app.dependencies.database import get_redis
+from app.dependencies.database import get_redis, get_redis_binary
 from app.service.audio_proxy_service import AudioProxyService, get_audio_proxy_service
 
 from fastapi import APIRouter, Depends, HTTPException, Path
@@ -18,9 +18,12 @@ import redis.asyncio as redis
 router = APIRouter(prefix="/audio", tags=["Audio Proxy"])
 
 
-async def get_audio_proxy_dependency(redis_client: Annotated[redis.Redis, Depends(get_redis)]) -> AudioProxyService:
+async def get_audio_proxy_dependency(
+    redis_binary_client: Annotated[redis.Redis, Depends(get_redis_binary)],
+    redis_text_client: Annotated[redis.Redis, Depends(get_redis)],
+) -> AudioProxyService:
     """音频代理服务依赖注入"""
-    return get_audio_proxy_service(redis_client)
+    return get_audio_proxy_service(redis_binary_client, redis_text_client)
 
 
 @router.get("/beatmapset/{beatmapset_id}")

app/service/audio_proxy_service.py

@@ -14,10 +14,11 @@ import redis.asyncio as redis
 class AudioProxyService:
     """音频代理服务"""
 
-    def __init__(self, redis_client: redis.Redis):
-        self.redis = redis_client
+    def __init__(self, redis_binary_client: redis.Redis, redis_text_client: redis.Redis):
+        self.redis_binary = redis_binary_client
+        self.redis_text = redis_text_client
         self.http_client = httpx.AsyncClient(timeout=30.0)
-        self._cache_ttl = 7 * 24 * 60 * 60  # 7天缓存
+        self._cache_ttl = 7 * 24 * 60 * 60
 
     async def close(self):
         """关闭HTTP客户端"""
@@ -37,14 +38,14 @@ class AudioProxyService:
             cache_key = self._get_beatmapset_cache_key(beatmapset_id)
             metadata_key = self._get_beatmapset_metadata_key(beatmapset_id)
 
-            # 获取音频数据和元数据
-            audio_data = await self.redis.get(cache_key)
-            metadata = await self.redis.get(metadata_key)
+            # 获取音频数据（二进制）和元数据（文本）
+            audio_data = await self.redis_binary.get(cache_key)
+            metadata = await self.redis_text.get(metadata_key)
 
             if audio_data and metadata:
                 logger.debug(f"Beatmapset audio cache hit for ID: {beatmapset_id}")
-                # metadata 格式为 "content_type"
-                return audio_data, metadata.decode()
+                # audio_data 已经是 bytes 类型，metadata 是 str 类型
+                return audio_data, metadata
             return None
         except (redis.RedisError, redis.ConnectionError) as e:
             logger.error(f"Error getting beatmapset audio from cache: {e}")
@@ -56,9 +57,9 @@ class AudioProxyService:
             cache_key = self._get_beatmapset_cache_key(beatmapset_id)
             metadata_key = self._get_beatmapset_metadata_key(beatmapset_id)
 
-            # 缓存音频数据和元数据
-            await self.redis.setex(cache_key, self._cache_ttl, audio_data)
-            await self.redis.setex(metadata_key, self._cache_ttl, content_type)
+            # 缓存音频数据（二进制）和元数据（文本）
+            await self.redis_binary.setex(cache_key, self._cache_ttl, audio_data)
+            await self.redis_text.setex(metadata_key, self._cache_ttl, content_type)
 
             logger.debug(f"Cached beatmapset audio for ID: {beatmapset_id}, size: {len(audio_data)} bytes")
         except (redis.RedisError, redis.ConnectionError) as e:
@@ -122,7 +123,7 @@ class AudioProxyService:
         return audio_data, content_type
 
 
-def get_audio_proxy_service(redis_client: redis.Redis) -> AudioProxyService:
+def get_audio_proxy_service(redis_binary_client: redis.Redis, redis_text_client: redis.Redis) -> AudioProxyService:
     """获取音频代理服务实例"""
     # 每次创建新实例，避免全局状态
-    return AudioProxyService(redis_client)
+    return AudioProxyService(redis_binary_client, redis_text_client)