mirror of
https://github.com/xfgryujk/blivechat.git
synced 2024-12-26 21:00:15 +08:00
555 lines
18 KiB
Python
555 lines
18 KiB
Python
# -*- coding: utf-8 -*-
|
||
import asyncio
|
||
import dataclasses
|
||
import datetime
|
||
import hashlib
|
||
import logging
|
||
import re
|
||
import urllib.parse
|
||
from typing import *
|
||
|
||
import aiohttp
|
||
import cachetools
|
||
import sqlalchemy.exc
|
||
|
||
import config
|
||
import models.bilibili as bl_models
|
||
import models.database
|
||
import utils.request
|
||
|
||
logger = logging.getLogger(__name__)
|
||
|
||
|
||
DEFAULT_AVATAR_URL = '//static.hdslb.com/images/member/noface.gif'
|
||
|
||
_avatar_fetchers: List['AvatarFetcher'] = []
|
||
# user_id -> avatar_url
|
||
_avatar_url_cache: Optional[cachetools.TTLCache] = None
|
||
# 正在获取头像的Future，user_id -> Future
|
||
_uid_fetch_future_map: Dict[int, asyncio.Future] = {}
|
||
# 正在获取头像的任务队列
|
||
_task_queue: Optional['asyncio.Queue[FetchTask]'] = None
|
||
|
||
|
||
@dataclasses.dataclass
|
||
class FetchTask:
|
||
user_id: int
|
||
future: 'asyncio.Future[Optional[str]]'
|
||
|
||
|
||
def init():
|
||
cfg = config.get_config()
|
||
global _avatar_url_cache, _task_queue
|
||
_avatar_url_cache = cachetools.TTLCache(cfg.avatar_cache_size, 10 * 60)
|
||
_task_queue = asyncio.Queue(cfg.fetch_avatar_max_queue_size)
|
||
asyncio.get_running_loop().create_task(_do_init())
|
||
|
||
|
||
async def _do_init():
|
||
fetchers = [
|
||
UserSpaceAvatarFetcher(5.5),
|
||
MedalAnchorAvatarFetcher(3),
|
||
UserCardAvatarFetcher(3),
|
||
GameUserCenterAvatarFetcher(3),
|
||
]
|
||
await asyncio.gather(*(fetcher.init() for fetcher in fetchers))
|
||
global _avatar_fetchers
|
||
_avatar_fetchers = fetchers
|
||
|
||
|
||
async def get_avatar_url(user_id) -> str:
|
||
avatar_url = await get_avatar_url_or_none(user_id)
|
||
if avatar_url is None:
|
||
avatar_url = DEFAULT_AVATAR_URL
|
||
return avatar_url
|
||
|
||
|
||
async def get_avatar_url_or_none(user_id) -> Optional[str]:
|
||
if user_id == 0:
|
||
return None
|
||
|
||
# 查内存
|
||
avatar_url = _get_avatar_url_from_memory(user_id)
|
||
if avatar_url is not None:
|
||
return avatar_url
|
||
|
||
# 查数据库
|
||
user = await _get_avatar_url_from_database(user_id)
|
||
if user is not None:
|
||
avatar_url = user.avatar_url
|
||
_update_avatar_cache_in_memory(user_id, avatar_url)
|
||
# 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
|
||
if (datetime.datetime.now() - user.update_time).days >= 1:
|
||
asyncio.create_task(_refresh_avatar_cache_from_web(user_id))
|
||
return avatar_url
|
||
|
||
# 从接口获取
|
||
avatar_url = await _get_avatar_url_from_web(user_id)
|
||
if avatar_url is not None:
|
||
update_avatar_cache(user_id, avatar_url)
|
||
return avatar_url
|
||
|
||
return None
|
||
|
||
|
||
async def _refresh_avatar_cache_from_web(user_id):
|
||
avatar_url = await _get_avatar_url_from_web(user_id)
|
||
if avatar_url is None:
|
||
return
|
||
update_avatar_cache(user_id, avatar_url)
|
||
|
||
|
||
def update_avatar_cache(user_id, avatar_url):
|
||
if user_id == 0:
|
||
return
|
||
_update_avatar_cache_in_memory(user_id, avatar_url)
|
||
_update_avatar_cache_in_database(user_id, avatar_url)
|
||
|
||
|
||
def update_avatar_cache_if_expired(user_id, avatar_url):
|
||
# 内存缓存过期了才更新，减少写入数据库的频率
|
||
if _get_avatar_url_from_memory(user_id) is None:
|
||
update_avatar_cache(user_id, avatar_url)
|
||
|
||
|
||
def process_avatar_url(avatar_url):
|
||
# 去掉协议，兼容HTTP、HTTPS
|
||
m = re.fullmatch(r'(?:https?:)?(.*)', avatar_url)
|
||
if m is not None:
|
||
avatar_url = m[1]
|
||
# 缩小图片加快传输
|
||
if not avatar_url.endswith('noface.gif'):
|
||
avatar_url += '@48w_48h'
|
||
return avatar_url
|
||
|
||
|
||
def _get_avatar_url_from_memory(user_id) -> Optional[str]:
|
||
return _avatar_url_cache.get(user_id, None)
|
||
|
||
|
||
def _update_avatar_cache_in_memory(user_id, avatar_url):
|
||
_avatar_url_cache[user_id] = avatar_url
|
||
|
||
|
||
def _get_avatar_url_from_database(user_id) -> Awaitable[Optional[bl_models.BilibiliUser]]:
|
||
loop = asyncio.get_running_loop()
|
||
return loop.run_in_executor(None, _do_get_avatar_url_from_database, user_id)
|
||
|
||
|
||
def _do_get_avatar_url_from_database(user_id) -> Optional[bl_models.BilibiliUser]:
|
||
try:
|
||
with models.database.get_session() as session:
|
||
user: bl_models.BilibiliUser = session.scalars(
|
||
sqlalchemy.select(bl_models.BilibiliUser).filter(
|
||
bl_models.BilibiliUser.uid == user_id
|
||
)
|
||
).one_or_none()
|
||
if user is None:
|
||
return None
|
||
return user
|
||
except sqlalchemy.exc.OperationalError:
|
||
# SQLite会锁整个文件，忽略就行
|
||
return None
|
||
except sqlalchemy.exc.SQLAlchemyError:
|
||
logger.exception('_do_get_avatar_url_from_database failed:')
|
||
return None
|
||
|
||
|
||
def _update_avatar_cache_in_database(user_id, avatar_url) -> Awaitable[None]:
|
||
return asyncio.get_running_loop().run_in_executor(
|
||
None, _do_update_avatar_cache_in_database, user_id, avatar_url
|
||
)
|
||
|
||
|
||
def _do_update_avatar_cache_in_database(user_id, avatar_url):
|
||
try:
|
||
with models.database.get_session() as session:
|
||
user = session.scalars(
|
||
sqlalchemy.select(bl_models.BilibiliUser).filter(
|
||
bl_models.BilibiliUser.uid == user_id
|
||
)
|
||
).one_or_none()
|
||
if user is None:
|
||
user = bl_models.BilibiliUser(
|
||
uid=user_id
|
||
)
|
||
session.add(user)
|
||
user.avatar_url = avatar_url
|
||
user.update_time = datetime.datetime.now()
|
||
session.commit()
|
||
except (sqlalchemy.exc.OperationalError, sqlalchemy.exc.IntegrityError):
|
||
# 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
|
||
pass
|
||
except sqlalchemy.exc.SQLAlchemyError:
|
||
logger.exception('_do_update_avatar_cache_in_database failed:')
|
||
|
||
|
||
def _get_avatar_url_from_web(user_id) -> Awaitable[Optional[str]]:
|
||
# 如果已有正在获取的future则返回，防止重复获取同一个uid
|
||
future = _uid_fetch_future_map.get(user_id, None)
|
||
if future is not None:
|
||
return future
|
||
# 否则创建一个获取任务
|
||
future = asyncio.get_running_loop().create_future()
|
||
|
||
task = FetchTask(
|
||
user_id=user_id,
|
||
future=future
|
||
)
|
||
if not _push_task(task):
|
||
future.set_result(None)
|
||
return future
|
||
|
||
_uid_fetch_future_map[user_id] = future
|
||
future.add_done_callback(lambda _future: _uid_fetch_future_map.pop(user_id, None))
|
||
return future
|
||
|
||
|
||
def _push_task(task: FetchTask):
|
||
if not _has_available_avatar_fetcher():
|
||
return False
|
||
|
||
try:
|
||
_task_queue.put_nowait(task)
|
||
return True
|
||
except asyncio.QueueFull:
|
||
return False
|
||
|
||
|
||
def _pop_task() -> Awaitable[FetchTask]:
|
||
return _task_queue.get()
|
||
|
||
|
||
def _cancel_all_tasks_if_no_available_avatar_fetcher():
|
||
if _has_available_avatar_fetcher():
|
||
return
|
||
|
||
logger.warning('No available avatar fetcher')
|
||
while not _task_queue.empty():
|
||
task = _task_queue.get_nowait()
|
||
task.future.set_result(None)
|
||
|
||
|
||
def _has_available_avatar_fetcher():
|
||
return any(fetcher.is_available for fetcher in _avatar_fetchers)
|
||
|
||
|
||
class AvatarFetcher:
|
||
def __init__(self, query_interval):
|
||
self._query_interval = query_interval
|
||
self._be_available_event = asyncio.Event()
|
||
self._be_available_event.set()
|
||
|
||
self._cool_down_timer_handle = None
|
||
|
||
async def init(self):
|
||
asyncio.create_task(self._fetch_consumer())
|
||
return True
|
||
|
||
@property
|
||
def is_available(self):
|
||
return self._cool_down_timer_handle is None
|
||
|
||
def _on_availability_change(self):
|
||
if self.is_available:
|
||
self._be_available_event.set()
|
||
else:
|
||
self._be_available_event.clear()
|
||
_cancel_all_tasks_if_no_available_avatar_fetcher()
|
||
|
||
async def _fetch_consumer(self):
|
||
cls_name = type(self).__name__
|
||
while True:
|
||
try:
|
||
if not self.is_available:
|
||
logger.info('%s waiting to become available', cls_name)
|
||
await self._be_available_event.wait()
|
||
logger.info('%s became available', cls_name)
|
||
|
||
task = await _pop_task()
|
||
# 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
|
||
assert self.is_available
|
||
|
||
start_time = datetime.datetime.now()
|
||
await self._fetch_wrapper(task)
|
||
cost_time = (datetime.datetime.now() - start_time).total_seconds()
|
||
|
||
# 限制频率，防止被B站ban
|
||
await asyncio.sleep(self._query_interval - cost_time)
|
||
except Exception: # noqa
|
||
logger.exception('%s error:', cls_name)
|
||
|
||
async def _fetch_wrapper(self, task: FetchTask) -> Optional[str]:
|
||
try:
|
||
avatar_url = await self._do_fetch(task.user_id)
|
||
except BaseException as e:
|
||
task.future.set_exception(e)
|
||
return None
|
||
|
||
task.future.set_result(avatar_url)
|
||
return avatar_url
|
||
|
||
async def _do_fetch(self, user_id) -> Optional[str]:
|
||
raise NotImplementedError
|
||
|
||
def _cool_down(self, sleep_time):
|
||
if self._cool_down_timer_handle is not None:
|
||
return
|
||
|
||
self._cool_down_timer_handle = asyncio.get_running_loop().call_later(
|
||
sleep_time, self._on_cool_down_timeout
|
||
)
|
||
self._on_availability_change()
|
||
|
||
def _on_cool_down_timeout(self):
|
||
self._cool_down_timer_handle = None
|
||
self._on_availability_change()
|
||
|
||
|
||
class UserSpaceAvatarFetcher(AvatarFetcher):
|
||
# wbi密码表
|
||
WBI_KEY_INDEX_TABLE = [
|
||
46, 47, 18, 2, 53, 8, 23, 32, 15, 50, 10, 31, 58, 3, 45, 35,
|
||
27, 43, 5, 49, 33, 9, 42, 19, 29, 28, 14, 39, 12, 38, 41, 13
|
||
]
|
||
|
||
def __init__(self, query_interval):
|
||
super().__init__(query_interval)
|
||
|
||
# wbi鉴权口令
|
||
self._wbi_key = ''
|
||
|
||
async def _do_fetch(self, user_id) -> Optional[str]:
|
||
if self._wbi_key == '':
|
||
await self._refresh_wbi_key()
|
||
if self._wbi_key == '':
|
||
return None
|
||
|
||
try:
|
||
async with utils.request.http_session.get(
|
||
'https://api.bilibili.com/x/space/wbi/acc/info',
|
||
headers={
|
||
**utils.request.BILIBILI_COMMON_HEADERS,
|
||
'Origin': 'https://space.bilibili.com',
|
||
'Referer': f'https://space.bilibili.com/{user_id}/'
|
||
},
|
||
params=self._add_wbi_sign({'mid': user_id}),
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning(
|
||
'UserSpaceAvatarFetcher 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)
|
||
await self._refresh_wbi_key()
|
||
return None
|
||
data = await r.json()
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
return None
|
||
|
||
code = data['code']
|
||
if code != 0:
|
||
logger.info(
|
||
'UserSpaceAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
|
||
code, data['message'], user_id
|
||
)
|
||
if code == -401:
|
||
# 被B站ban了
|
||
self._cool_down(3 * 60)
|
||
await self._refresh_wbi_key()
|
||
elif code == -403:
|
||
# 签名错误
|
||
self._wbi_key = ''
|
||
await self._refresh_wbi_key()
|
||
return None
|
||
|
||
return process_avatar_url(data['data']['face'])
|
||
|
||
async def _refresh_wbi_key(self):
|
||
wbi_key = await self._get_wbi_key()
|
||
if wbi_key != '':
|
||
self._wbi_key = wbi_key
|
||
|
||
async def _get_wbi_key(self):
|
||
try:
|
||
async with utils.request.http_session.get(
|
||
'https://api.bilibili.com/nav',
|
||
headers=utils.request.BILIBILI_COMMON_HEADERS,
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning('UserSpaceAvatarFetcher failed to get wbi key: status=%d %s', r.status, r.reason)
|
||
return ''
|
||
data = await r.json()
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
logger.exception('UserSpaceAvatarFetcher failed to get wbi key:')
|
||
return ''
|
||
|
||
try:
|
||
wbi_img = data['data']['wbi_img']
|
||
img_key = wbi_img['img_url'].rpartition('/')[2].partition('.')[0]
|
||
sub_key = wbi_img['sub_url'].rpartition('/')[2].partition('.')[0]
|
||
except KeyError:
|
||
logger.warning('UserSpaceAvatarFetcher failed to get wbi key: data=%s', data)
|
||
return ''
|
||
|
||
shuffled_key = img_key + sub_key
|
||
wbi_key = []
|
||
for index in self.WBI_KEY_INDEX_TABLE:
|
||
if index < len(shuffled_key):
|
||
wbi_key.append(shuffled_key[index])
|
||
return ''.join(wbi_key)
|
||
|
||
def _add_wbi_sign(self, params: dict):
|
||
if self._wbi_key == '':
|
||
return params
|
||
|
||
wts = str(int(datetime.datetime.now().timestamp()))
|
||
params_to_sign = {**params, 'wts': wts}
|
||
|
||
# 按key字典序排序
|
||
params_to_sign = {
|
||
key: params_to_sign[key]
|
||
for key in sorted(params_to_sign.keys())
|
||
}
|
||
# 过滤一些字符
|
||
for key, value in params_to_sign.items():
|
||
value = ''.join(
|
||
ch
|
||
for ch in str(value)
|
||
if ch not in "!'()*"
|
||
)
|
||
params_to_sign[key] = value
|
||
|
||
str_to_sign = urllib.parse.urlencode(params_to_sign) + self._wbi_key
|
||
w_rid = hashlib.md5(str_to_sign.encode('utf-8')).hexdigest()
|
||
return {
|
||
**params,
|
||
'wts': wts,
|
||
'w_rid': w_rid
|
||
}
|
||
|
||
|
||
class MedalAnchorAvatarFetcher(AvatarFetcher):
|
||
async def _do_fetch(self, user_id) -> Optional[str]:
|
||
try:
|
||
async with utils.request.http_session.get(
|
||
'https://api.live.bilibili.com/xlive/web-room/v1/index/getDanmuMedalAnchorInfo',
|
||
headers={
|
||
**utils.request.BILIBILI_COMMON_HEADERS,
|
||
'Origin': 'https://live.bilibili.com',
|
||
'Referer': 'https://live.bilibili.com/'
|
||
},
|
||
params={
|
||
'ruid': user_id,
|
||
'token': '',
|
||
'platform': 'web',
|
||
'jsonp': 'jsonp'
|
||
}
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning(
|
||
'MedalAnchorAvatarFetcher 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(
|
||
'MedalAnchorAvatarFetcher failed to fetch avatar: code=%d %s uid=%d',
|
||
code, data['message'], user_id
|
||
)
|
||
return None
|
||
|
||
return process_avatar_url(data['data']['rface'])
|
||
|
||
|
||
class UserCardAvatarFetcher(AvatarFetcher):
|
||
async def _do_fetch(self, user_id) -> Optional[str]:
|
||
try:
|
||
async with utils.request.http_session.get(
|
||
'https://api.bilibili.com/x/web-interface/card',
|
||
headers={
|
||
**utils.request.BILIBILI_COMMON_HEADERS,
|
||
'Origin': 'https://t.bilibili.com',
|
||
'Referer': 'https://t.bilibili.com/'
|
||
},
|
||
params={
|
||
'mid': user_id,
|
||
'photo': 'true'
|
||
}
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning(
|
||
'UserCardAvatarFetcher 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(
|
||
'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'])
|