mirror of
https://github.com/xfgryujk/blivechat.git
synced 2024-12-28 05:40:19 +08:00
553 lines
18 KiB
Python
553 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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import asyncio
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import dataclasses
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import datetime
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import hashlib
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import logging
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import re
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import urllib.parse
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from typing import *
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import aiohttp
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import cachetools
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import sqlalchemy.exc
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import config
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import models.bilibili as bl_models
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import models.database
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import utils.request
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logger = logging.getLogger(__name__)
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DEFAULT_AVATAR_URL = '//static.hdslb.com/images/member/noface.gif'
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_avatar_fetchers: List['AvatarFetcher'] = []
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# user_id -> avatar_url
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_avatar_url_cache: Optional[cachetools.TTLCache] = None
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# 正在获取头像的Future，user_id -> Future
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_uid_fetch_future_map: Dict[int, asyncio.Future] = {}
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# 正在获取头像的任务队列
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_task_queue: Optional['asyncio.Queue[FetchTask]'] = None
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@dataclasses.dataclass
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class FetchTask:
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user_id: int
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future: 'asyncio.Future[Optional[str]]'
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def init():
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cfg = config.get_config()
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global _avatar_url_cache, _task_queue
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_avatar_url_cache = cachetools.TTLCache(cfg.avatar_cache_size, 10 * 60)
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_task_queue = asyncio.Queue(cfg.fetch_avatar_max_queue_size)
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asyncio.get_event_loop().create_task(_do_init())
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async def _do_init():
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fetchers = [
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UserSpaceAvatarFetcher(5.5),
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MedalAnchorAvatarFetcher(3),
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UserCardAvatarFetcher(3),
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GameUserCenterAvatarFetcher(3),
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]
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await asyncio.gather(*(fetcher.init() for fetcher in fetchers))
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global _avatar_fetchers
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_avatar_fetchers = fetchers
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async def get_avatar_url(user_id) -> str:
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avatar_url = await get_avatar_url_or_none(user_id)
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if avatar_url is None:
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avatar_url = DEFAULT_AVATAR_URL
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return avatar_url
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async def get_avatar_url_or_none(user_id) -> Optional[str]:
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if user_id == 0:
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return None
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# 查内存
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avatar_url = _get_avatar_url_from_memory(user_id)
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if avatar_url is not None:
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return avatar_url
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# 查数据库
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user = await _get_avatar_url_from_database(user_id)
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if user is not None:
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avatar_url = user.avatar_url
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_update_avatar_cache_in_memory(user_id, avatar_url)
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# 如果距离数据库上次更新太久，则在后台从接口获取，并更新所有缓存
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if (datetime.datetime.now() - user.update_time).days >= 1:
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asyncio.create_task(_refresh_avatar_cache_from_web(user_id))
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return avatar_url
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# 从接口获取
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avatar_url = await _get_avatar_url_from_web(user_id)
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if avatar_url is not None:
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update_avatar_cache(user_id, avatar_url)
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return avatar_url
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return None
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async def _refresh_avatar_cache_from_web(user_id):
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avatar_url = await _get_avatar_url_from_web(user_id)
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if avatar_url is None:
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return
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update_avatar_cache(user_id, avatar_url)
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def update_avatar_cache(user_id, avatar_url):
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_update_avatar_cache_in_memory(user_id, avatar_url)
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_update_avatar_cache_in_database(user_id, avatar_url)
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def update_avatar_cache_if_expired(user_id, avatar_url):
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# 内存缓存过期了才更新，减少写入数据库的频率
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if _get_avatar_url_from_memory(user_id) is None:
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update_avatar_cache(user_id, avatar_url)
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def process_avatar_url(avatar_url):
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# 去掉协议，兼容HTTP、HTTPS
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m = re.fullmatch(r'(?:https?:)?(.*)', avatar_url)
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if m is not None:
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avatar_url = m[1]
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# 缩小图片加快传输
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if not avatar_url.endswith('noface.gif'):
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avatar_url += '@48w_48h'
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return avatar_url
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def _get_avatar_url_from_memory(user_id) -> Optional[str]:
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return _avatar_url_cache.get(user_id, None)
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def _update_avatar_cache_in_memory(user_id, avatar_url):
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_avatar_url_cache[user_id] = avatar_url
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def _get_avatar_url_from_database(user_id) -> Awaitable[Optional[bl_models.BilibiliUser]]:
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loop = asyncio.get_running_loop()
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return loop.run_in_executor(None, _do_get_avatar_url_from_database, user_id)
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def _do_get_avatar_url_from_database(user_id) -> Optional[bl_models.BilibiliUser]:
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try:
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with models.database.get_session() as session:
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user: bl_models.BilibiliUser = session.scalars(
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sqlalchemy.select(bl_models.BilibiliUser).filter(
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bl_models.BilibiliUser.uid == user_id
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)
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).one_or_none()
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if user is None:
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return None
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return user
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except sqlalchemy.exc.OperationalError:
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# SQLite会锁整个文件，忽略就行
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return None
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except sqlalchemy.exc.SQLAlchemyError:
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logger.exception('_do_get_avatar_url_from_database failed:')
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return None
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def _update_avatar_cache_in_database(user_id, avatar_url) -> Awaitable[None]:
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return asyncio.get_running_loop().run_in_executor(
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None, _do_update_avatar_cache_in_database, user_id, avatar_url
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)
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def _do_update_avatar_cache_in_database(user_id, avatar_url):
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try:
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with models.database.get_session() as session:
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user = session.scalars(
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sqlalchemy.select(bl_models.BilibiliUser).filter(
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bl_models.BilibiliUser.uid == user_id
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)
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).one_or_none()
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if user is None:
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user = bl_models.BilibiliUser(
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uid=user_id
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)
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session.add(user)
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user.avatar_url = avatar_url
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user.update_time = datetime.datetime.now()
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session.commit()
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except (sqlalchemy.exc.OperationalError, sqlalchemy.exc.IntegrityError):
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# SQLite会锁整个文件，忽略就行。另外还有多线程导致ID重复的问题，这里对一致性要求不高就没加for update
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pass
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except sqlalchemy.exc.SQLAlchemyError:
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logger.exception('_do_update_avatar_cache_in_database failed:')
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def _get_avatar_url_from_web(user_id) -> Awaitable[Optional[str]]:
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# 如果已有正在获取的future则返回，防止重复获取同一个uid
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future = _uid_fetch_future_map.get(user_id, None)
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if future is not None:
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return future
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# 否则创建一个获取任务
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future = asyncio.get_running_loop().create_future()
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task = FetchTask(
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user_id=user_id,
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future=future
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)
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if not _push_task(task):
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future.set_result(None)
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return future
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_uid_fetch_future_map[user_id] = future
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future.add_done_callback(lambda _future: _uid_fetch_future_map.pop(user_id, None))
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return future
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def _push_task(task: FetchTask):
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if not _has_available_avatar_fetcher():
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return False
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try:
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_task_queue.put_nowait(task)
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return True
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except asyncio.QueueFull:
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return False
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def _pop_task() -> Awaitable[FetchTask]:
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return _task_queue.get()
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def _cancel_all_tasks_if_no_available_avatar_fetcher():
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if _has_available_avatar_fetcher():
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return
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logger.warning('No available avatar fetcher')
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while not _task_queue.empty():
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task = _task_queue.get_nowait()
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task.future.set_result(None)
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def _has_available_avatar_fetcher():
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return any(fetcher.is_available for fetcher in _avatar_fetchers)
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class AvatarFetcher:
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def __init__(self, query_interval):
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self._query_interval = query_interval
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self._be_available_event = asyncio.Event()
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self._be_available_event.set()
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self._cool_down_timer_handle = None
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async def init(self):
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asyncio.create_task(self._fetch_consumer())
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return True
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@property
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def is_available(self):
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return self._cool_down_timer_handle is None
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def _on_availability_change(self):
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if self.is_available:
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self._be_available_event.set()
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else:
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self._be_available_event.clear()
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_cancel_all_tasks_if_no_available_avatar_fetcher()
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async def _fetch_consumer(self):
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cls_name = type(self).__name__
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while True:
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try:
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if not self.is_available:
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logger.info('%s waiting to become available', cls_name)
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await self._be_available_event.wait()
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logger.info('%s became available', cls_name)
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task = await _pop_task()
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# 为了简化代码，约定只会在_fetch_wrapper里变成不可用，所以获取task之后这里还是可用的
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assert self.is_available
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start_time = datetime.datetime.now()
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await self._fetch_wrapper(task)
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cost_time = (datetime.datetime.now() - start_time).total_seconds()
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# 限制频率，防止被B站ban
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await asyncio.sleep(self._query_interval - cost_time)
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except Exception: # noqa
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logger.exception('%s error:', cls_name)
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async def _fetch_wrapper(self, task: FetchTask) -> Optional[str]:
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try:
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avatar_url = await self._do_fetch(task.user_id)
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except BaseException as e:
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task.future.set_exception(e)
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return None
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task.future.set_result(avatar_url)
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return avatar_url
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async def _do_fetch(self, user_id) -> Optional[str]:
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raise NotImplementedError
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def _cool_down(self, sleep_time):
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if self._cool_down_timer_handle is not None:
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return
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self._cool_down_timer_handle = asyncio.get_running_loop().call_later(
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sleep_time, self._on_cool_down_timeout
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)
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self._on_availability_change()
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def _on_cool_down_timeout(self):
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self._cool_down_timer_handle = None
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self._on_availability_change()
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class UserSpaceAvatarFetcher(AvatarFetcher):
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# wbi密码表
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WBI_KEY_INDEX_TABLE = [
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46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35,
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27, 43, 5, 49, 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13
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]
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def __init__(self, query_interval):
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super().__init__(query_interval)
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# wbi鉴权口令
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self._wbi_key = ''
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async def _do_fetch(self, user_id) -> Optional[str]:
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if self._wbi_key == '':
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await self._refresh_wbi_key()
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if self._wbi_key == '':
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return None
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try:
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async with utils.request.http_session.get(
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'https://api.bilibili.com/x/space/wbi/acc/info',
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headers={
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**utils.request.BILIBILI_COMMON_HEADERS,
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'Origin': 'https://space.bilibili.com',
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'Referer': f'https://space.bilibili.com/{user_id}/'
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},
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params=self._add_wbi_sign({'mid': user_id}),
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) as r:
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if r.status != 200:
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logger.warning(
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'UserSpaceAvatarFetcher failed to fetch avatar: status=%d %s uid=%d',
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r.status, r.reason, user_id
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)
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if r.status == 412:
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# 被B站ban了
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self._cool_down(3 * 60)
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await self._refresh_wbi_key()
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return None
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data = await r.json()
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except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
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return None
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code = data['code']
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if code != 0:
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logger.info(
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'UserSpaceAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
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code, data['message'], user_id
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)
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if code == -401:
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# 被B站ban了
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self._cool_down(3 * 60)
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await self._refresh_wbi_key()
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elif code == -403:
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# 签名错误
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self._wbi_key = ''
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await self._refresh_wbi_key()
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return None
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return process_avatar_url(data['data']['face'])
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async def _refresh_wbi_key(self):
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wbi_key = await self._get_wbi_key()
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if wbi_key != '':
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self._wbi_key = wbi_key
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async def _get_wbi_key(self):
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try:
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async with utils.request.http_session.get(
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'https://api.bilibili.com/nav',
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headers=utils.request.BILIBILI_COMMON_HEADERS,
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) as r:
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if r.status != 200:
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logger.warning('UserSpaceAvatarFetcher failed to get wbi key: status=%d %s', r.status, r.reason)
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return ''
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data = await r.json()
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except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
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logger.exception('UserSpaceAvatarFetcher failed to get wbi key:')
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return ''
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try:
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wbi_img = data['data']['wbi_img']
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img_key = wbi_img['img_url'].rpartition('/')[2].partition('.')[0]
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sub_key = wbi_img['sub_url'].rpartition('/')[2].partition('.')[0]
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except KeyError:
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logger.warning('UserSpaceAvatarFetcher failed to get wbi key: data=%s', data)
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return ''
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shuffled_key = img_key + sub_key
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wbi_key = []
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for index in self.WBI_KEY_INDEX_TABLE:
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if index < len(shuffled_key):
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wbi_key.append(shuffled_key[index])
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return ''.join(wbi_key)
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def _add_wbi_sign(self, params: dict):
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if self._wbi_key == '':
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return params
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wts = str(int(datetime.datetime.now().timestamp()))
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params_to_sign = {**params, 'wts': wts}
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# 按key字典序排序
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params_to_sign = {
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key: params_to_sign[key]
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for key in sorted(params_to_sign.keys())
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}
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# 过滤一些字符
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for key, value in params_to_sign.items():
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value = ''.join(
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ch
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for ch in str(value)
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if ch not in "!'()*"
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)
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params_to_sign[key] = value
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str_to_sign = urllib.parse.urlencode(params_to_sign) + self._wbi_key
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w_rid = hashlib.md5(str_to_sign.encode('utf-8')).hexdigest()
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return {
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**params,
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'wts': wts,
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'w_rid': w_rid
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}
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class MedalAnchorAvatarFetcher(AvatarFetcher):
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async def _do_fetch(self, user_id) -> Optional[str]:
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try:
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async with utils.request.http_session.get(
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'https://api.live.bilibili.com/xlive/web-room/v1/index/getDanmuMedalAnchorInfo',
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headers={
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**utils.request.BILIBILI_COMMON_HEADERS,
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'Origin': 'https://live.bilibili.com',
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'Referer': 'https://live.bilibili.com/'
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},
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params={
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'ruid': user_id,
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'token': '',
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'platform': 'web',
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'jsonp': 'jsonp'
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}
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) as r:
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if r.status != 200:
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logger.warning(
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'MedalAnchorAvatarFetcher failed to fetch avatar: status=%d %s uid=%d',
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r.status, r.reason, user_id
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)
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if r.status == 412:
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# 被B站ban了
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self._cool_down(3 * 60)
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return None
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data = await r.json()
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except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
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return None
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code = data['code']
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if code != 0:
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# 这里虽然失败但不会被ban一段时间
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logger.info(
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'MedalAnchorAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
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code, data['message'], user_id
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)
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return None
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return process_avatar_url(data['data']['rface'])
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class UserCardAvatarFetcher(AvatarFetcher):
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async def _do_fetch(self, user_id) -> Optional[str]:
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try:
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async with utils.request.http_session.get(
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'https://api.bilibili.com/x/web-interface/card',
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headers={
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**utils.request.BILIBILI_COMMON_HEADERS,
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'Origin': 'https://t.bilibili.com',
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'Referer': 'https://t.bilibili.com/'
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},
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params={
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'mid': user_id,
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'photo': 'true'
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}
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) as r:
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if r.status != 200:
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logger.warning(
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'UserCardAvatarFetcher failed to fetch avatar: status=%d %s uid=%d',
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r.status, r.reason, user_id
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)
|
||
if r.status == 412:
|
||
# 被B站ban了
|
||
self._cool_down(3 * 60)
|
||
return None
|
||
data = await r.json()
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
return None
|
||
|
||
code = data['code']
|
||
if code != 0:
|
||
# 这里虽然失败但不会被ban一段时间
|
||
logger.info(
|
||
'UserCardAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
|
||
code, data['message'], user_id
|
||
)
|
||
return None
|
||
|
||
return process_avatar_url(data['data']['card']['face'])
|
||
|
||
|
||
class GameUserCenterAvatarFetcher(AvatarFetcher):
|
||
async def _do_fetch(self, user_id) -> Optional[str]:
|
||
try:
|
||
async with utils.request.http_session.get(
|
||
'https://line3-h5-mobile-api.biligame.com/game/center/h5/user/space/info',
|
||
headers={
|
||
**utils.request.BILIBILI_COMMON_HEADERS,
|
||
'Origin': 'https://app.biligame.com',
|
||
'Referer': 'https://app.biligame.com/'
|
||
},
|
||
params={
|
||
'uid': user_id,
|
||
'sdk_type': '1'
|
||
}
|
||
) as r:
|
||
if r.status != 200:
|
||
# 这个接口经常502
|
||
logger.info(
|
||
'GameUserCenterAvatarFetcher failed to fetch avatar: status=%d %s uid=%d',
|
||
r.status, r.reason, user_id
|
||
)
|
||
if r.status == 412:
|
||
# 被B站ban了
|
||
self._cool_down(3 * 60)
|
||
return None
|
||
data = await r.json()
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
return None
|
||
|
||
code = data['code']
|
||
if code != 0:
|
||
# 这里虽然失败但不会被ban一段时间
|
||
logger.info(
|
||
'GameUserCenterAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
|
||
code, data['message'], user_id
|
||
)
|
||
return None
|
||
|
||
return process_avatar_url(data['data']['face'])
|