使用Python 3.8的asyncio特性

api/chat.py

@@ -129,21 +129,21 @@ def __init__(self, *args, **kwargs):
 
     def open(self):
         logger.info('client=%s connected', self.request.remote_ip)
-        self._heartbeat_timer_handle = asyncio.get_event_loop().call_later(
+        self._heartbeat_timer_handle = asyncio.get_running_loop().call_later(
             self.HEARTBEAT_INTERVAL, self._on_send_heartbeat
         )
         self._refresh_receive_timeout_timer()
 
     def _on_send_heartbeat(self):
         self.send_cmd_data(Command.HEARTBEAT, {})
-        self._heartbeat_timer_handle = asyncio.get_event_loop().call_later(
+        self._heartbeat_timer_handle = asyncio.get_running_loop().call_later(
             self.HEARTBEAT_INTERVAL, self._on_send_heartbeat
         )
 
     def _refresh_receive_timeout_timer(self):
         if self._receive_timeout_timer_handle is not None:
             self._receive_timeout_timer_handle.cancel()
-        self._receive_timeout_timer_handle = asyncio.get_event_loop().call_later(
+        self._receive_timeout_timer_handle = asyncio.get_running_loop().call_later(
             self.RECEIVE_TIMEOUT, self._on_receive_timeout
         )
 
@@ -189,7 +189,7 @@ def on_message(self, message):
                     pass
 
                 services.chat.client_room_manager.add_client(self.room_id, self)
-                asyncio.ensure_future(self._on_joined_room())
+                asyncio.create_task(self._on_joined_room())
 
             else:
                 logger.warning('client=%s unknown cmd=%d, body=%s', self.request.remote_ip, cmd, body)

api/main.py

@@ -56,7 +56,7 @@ async def post(self):
         if not file.content_type.lower().startswith('image/'):
             raise tornado.web.HTTPError(415)
 
-        url = await asyncio.get_event_loop().run_in_executor(
+        url = await asyncio.get_running_loop().run_in_executor(
             None, self._save_file, file.body, self.request.remote_ip
         )
         self.write({

main.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
 import argparse
-import asyncio
 import logging
 import logging.handlers
 import os
@@ -40,7 +39,7 @@ def main():
     init_logging(args.debug)
     config.init()
 
-    asyncio.get_event_loop().run_until_complete(utils.request.init())
+    utils.request.init()
     models.database.init(args.debug)
 
     services.avatar.init()

services/avatar.py

@@ -20,7 +20,6 @@
 
 DEFAULT_AVATAR_URL = '//static.hdslb.com/images/member/noface.gif'
 
-_main_event_loop = asyncio.get_event_loop()
 # user_id -> avatar_url
 _avatar_url_cache: Dict[int, str] = {}
 # 正在获取头像的Future，user_id -> Future
@@ -43,7 +42,7 @@ def init():
     cfg = config.get_config()
     global _uid_queue_to_fetch
     _uid_queue_to_fetch = asyncio.Queue(cfg.fetch_avatar_max_queue_size)
-    asyncio.ensure_future(_get_avatar_url_from_web_consumer())
+    asyncio.get_event_loop().create_task(_get_avatar_url_from_web_consumer())
 
 
 async def get_avatar_url(user_id):
@@ -71,12 +70,11 @@ def get_avatar_url_from_memory(user_id):
 
 
 def get_avatar_url_from_database(user_id) -> Awaitable[Optional[str]]:
-    return asyncio.get_event_loop().run_in_executor(
-        None, _do_get_avatar_url_from_database, user_id
-    )
+    loop = asyncio.get_running_loop()
+    return loop.run_in_executor(None, _do_get_avatar_url_from_database, user_id, loop)
 
 
-def _do_get_avatar_url_from_database(user_id):
+def _do_get_avatar_url_from_database(user_id, loop: asyncio.AbstractEventLoop):
     try:
         with models.database.get_session() as session:
             user = session.scalars(
@@ -94,7 +92,7 @@ def refresh_cache():
                     _avatar_url_cache.pop(user_id, None)
                     get_avatar_url_from_web(user_id)
 
-                _main_event_loop.call_soon(refresh_cache)
+                loop.call_soon_threadsafe(refresh_cache)
             else:
                 # 否则只更新内存缓存
                 _update_avatar_cache_in_memory(user_id, avatar_url)
@@ -113,7 +111,7 @@ def get_avatar_url_from_web(user_id) -> Awaitable[Optional[str]]:
     if future is not None:
         return future
     # 否则创建一个获取任务
-    _uid_fetch_future_map[user_id] = future = _main_event_loop.create_future()
+    _uid_fetch_future_map[user_id] = future = asyncio.get_running_loop().create_future()
     future.add_done_callback(lambda _future: _uid_fetch_future_map.pop(user_id, None))
     try:
         _uid_queue_to_fetch.put_nowait(user_id)
@@ -141,7 +139,7 @@ async def _get_avatar_url_from_web_consumer():
                 else:
                     _last_fetch_banned_time = None
 
-            asyncio.ensure_future(_get_avatar_url_from_web_coroutine(user_id, future))
+            asyncio.create_task(_get_avatar_url_from_web_coroutine(user_id, future))
 
             # 限制频率，防止被B站ban
             cfg = config.get_config()
@@ -271,7 +269,7 @@ def process_avatar_url(avatar_url):
 
 def update_avatar_cache(user_id, avatar_url):
     _update_avatar_cache_in_memory(user_id, avatar_url)
-    asyncio.get_event_loop().run_in_executor(
+    asyncio.get_running_loop().run_in_executor(
         None, _update_avatar_cache_in_database, user_id, avatar_url
     )
 

services/chat.py

@@ -39,7 +39,7 @@ def add_live_client(self, room_id):
         logger.info('room=%d creating live client', room_id)
         self._live_clients[room_id] = live_client = LiveClient(room_id)
         live_client.add_handler(_live_msg_handler)
-        asyncio.ensure_future(self._init_live_client(live_client))
+        asyncio.create_task(self._init_live_client(live_client))
         logger.info('room=%d live client created, %d live clients', room_id, len(self._live_clients))
 
     async def _init_live_client(self, live_client: 'LiveClient'):
@@ -56,7 +56,7 @@ def del_live_client(self, room_id):
             return
         logger.info('room=%d removing live client', room_id)
         live_client.remove_handler(_live_msg_handler)
-        asyncio.ensure_future(live_client.stop_and_close())
+        asyncio.create_task(live_client.stop_and_close())
         logger.info('room=%d live client removed, %d live clients', room_id, len(self._live_clients))
 
         client_room_manager.del_room(room_id)
@@ -130,7 +130,7 @@ def del_room(self, room_id):
 
     def delay_del_room(self, room_id, timeout):
         self._clear_delay_del_timer(room_id)
-        self._delay_del_timer_handles[room_id] = asyncio.get_event_loop().call_later(
+        self._delay_del_timer_handles[room_id] = asyncio.get_running_loop().call_later(
             timeout, self._on_delay_del_room, room_id
         )
 
@@ -279,7 +279,7 @@ def __super_chat_message_callback(self, client: LiveClient, command: dict):
     }
 
     async def _on_danmaku(self, client: LiveClient, message: blivedm.DanmakuMessage):
-        asyncio.ensure_future(self.__on_danmaku(client, message))
+        asyncio.create_task(self.__on_danmaku(client, message))
 
     async def __on_danmaku(self, client: LiveClient, message: blivedm.DanmakuMessage):
         # 先异步调用再获取房间，因为返回时房间可能已经不存在了
@@ -364,7 +364,7 @@ async def _on_gift(self, client: LiveClient, message: blivedm.GiftMessage):
         })
 
     async def _on_buy_guard(self, client: LiveClient, message: blivedm.GuardBuyMessage):
-        asyncio.ensure_future(self.__on_buy_guard(client, message))
+        asyncio.create_task(self.__on_buy_guard(client, message))
 
     @staticmethod
     async def __on_buy_guard(client: LiveClient, message: blivedm.GuardBuyMessage):
@@ -415,7 +415,7 @@ async def _on_super_chat(self, client: LiveClient, message: blivedm.SuperChatMes
         })
 
         if need_translate:
-            asyncio.ensure_future(self._translate_and_response(message.message, room.room_id, msg_id))
+            asyncio.create_task(self._translate_and_response(message.message, room.room_id, msg_id))
 
     async def _on_super_chat_delete(self, client: LiveClient, message: blivedm.SuperChatDeleteMessage):
         room = client_room_manager.get_room(client.tmp_room_id)

services/translate.py

@@ -33,7 +33,7 @@
 
 
 def init():
-    asyncio.ensure_future(_do_init())
+    asyncio.get_event_loop().create_task(_do_init())
 
 
 async def _do_init():
@@ -100,7 +100,7 @@ def translate(text) -> Awaitable[Optional[str]]:
     if future is not None:
         return future
     # 否则创建一个翻译任务
-    future = asyncio.get_event_loop().create_future()
+    future = asyncio.get_running_loop().create_future()
 
     # 查缓存
     res = _translate_cache.get(key, None)
@@ -168,7 +168,7 @@ def __init__(self, query_interval, max_queue_size):
         self._text_queue = asyncio.Queue(max_queue_size)
 
     async def init(self):
-        asyncio.ensure_future(self._translate_consumer())
+        asyncio.create_task(self._translate_consumer())
         return True
 
     @property
@@ -189,7 +189,7 @@ async def _translate_consumer(self):
         while True:
             try:
                 text, future = await self._text_queue.get()
-                asyncio.ensure_future(self._translate_coroutine(text, future))
+                asyncio.create_task(self._translate_coroutine(text, future))
                 # 频率限制
                 await asyncio.sleep(self._query_interval)
             except Exception:  # noqa
@@ -226,7 +226,7 @@ async def init(self):
             return False
         if not await self._do_init():
             return False
-        self._reinit_future = asyncio.ensure_future(self._reinit_coroutine())
+        self._reinit_future = asyncio.create_task(self._reinit_coroutine())
         return True
 
     async def _do_init(self):
@@ -303,7 +303,7 @@ async def _reinit_coroutine(self):
             while True:
                 await asyncio.sleep(30)
                 logger.debug('TencentTranslateFree reinit')
-                asyncio.ensure_future(self._do_init())
+                asyncio.create_task(self._do_init())
         except asyncio.CancelledError:
             pass
 
@@ -515,7 +515,7 @@ def _on_fail(self, code):
             # 需要手动处理，等5分钟
             sleep_time = 5 * 60
         if sleep_time != 0:
-            self._cool_down_timer_handle = asyncio.get_event_loop().call_later(
+            self._cool_down_timer_handle = asyncio.get_running_loop().call_later(
                 sleep_time, self._on_cool_down_timeout
             )
 
@@ -577,7 +577,7 @@ def _on_fail(self, code):
             # 账户余额不足，需要手动处理，等5分钟
             sleep_time = 5 * 60
         if sleep_time != 0:
-            self._cool_down_timer_handle = asyncio.get_event_loop().call_later(
+            self._cool_down_timer_handle = asyncio.get_running_loop().call_later(
                 sleep_time, self._on_cool_down_timeout
             )
 

update.py

@@ -9,7 +9,7 @@
 
 
 def check_update():
-    asyncio.ensure_future(_do_check_update())
+    asyncio.get_event_loop().create_task(_do_check_update())
 
 
 async def _do_check_update():

utils/request.py

@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+import asyncio
 from typing import *
 
 import aiohttp
@@ -14,7 +15,10 @@
 http_session: Optional[aiohttp.ClientSession] = None
 
 
-# ClientSession要在异步函数中创建
-async def init():
-    global http_session
-    http_session = aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=10))
+def init():
+    # ClientSession要在异步函数中创建
+    async def do_init():
+        global http_session
+        http_session = aiohttp.ClientSession(timeout=aiohttp.ClientTimeout(total=10))
+
+    asyncio.get_event_loop().run_until_complete(do_init())