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blivechat/api/open_live.py

246 lines
7.9 KiB
Python

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# -*- coding: utf-8 -*-
import asyncio
import datetime
import hashlib
import hmac
import json
import logging
import random
import re
from typing import *
import aiohttp
import cachetools
import tornado.web
import api.base
import config
import utils.request
logger = logging.getLogger(__name__)
START_GAME_OPEN_LIVE_URL = 'https://live-open.biliapi.com/v2/app/start'
END_GAME_OPEN_LIVE_URL = 'https://live-open.biliapi.com/v2/app/end'
GAME_HEARTBEAT_OPEN_LIVE_URL = 'https://live-open.biliapi.com/v2/app/heartbeat'
COMMON_SERVER_BASE_URL = 'https://chat.bilisc.com'
START_GAME_COMMON_SERVER_URL = COMMON_SERVER_BASE_URL + '/api/internal/open_live/start_game'
END_GAME_COMMON_SERVER_URL = COMMON_SERVER_BASE_URL + '/api/internal/open_live/end_game'
GAME_HEARTBEAT_COMMON_SERVER_URL = COMMON_SERVER_BASE_URL + '/api/internal/open_live/game_heartbeat'
_error_auth_code_cache = cachetools.LRUCache(256)
class TransportError(Exception):
"""网络错误或HTTP状态码错误"""
class BusinessError(Exception):
"""业务返回码错误"""
def __init__(self, data: dict):
super().__init__(f"code={data['code']}, message={data['message']}, request_id={data['request_id']}")
self.data = data
@property
def code(self) -> int:
return self.data['code']
async def request_open_live_or_common_server(open_live_url, common_server_url, body: dict) -> dict:
"""如果配置了开放平台,则直接请求,否则转发请求到公共服务器的内部接口"""
cfg = config.get_config()
if cfg.is_open_live_configured:
return await _request_open_live(open_live_url, body)
try:
req_ctx_mgr = utils.request.http_session.post(common_server_url, json=body)
return await _read_response(req_ctx_mgr)
except TransportError:
logger.exception('Request common server failed:')
raise
except BusinessError as e:
logger.warning('Request common server failed: %s', e)
raise
async def _request_open_live(url, body: dict) -> dict:
cfg = config.get_config()
assert cfg.is_open_live_configured
# 输错身份码的人太多了屏蔽掉明显错误的请求防止B站抱怨
if url == START_GAME_OPEN_LIVE_URL:
auth_code = body.get('code', '')
_validate_auth_code(auth_code)
else:
auth_code = ''
body_bytes = json.dumps(body).encode('utf-8')
headers = {
'x-bili-accesskeyid': cfg.open_live_access_key_id,
'x-bili-content-md5': hashlib.md5(body_bytes).hexdigest(),
'x-bili-signature-method': 'HMAC-SHA256',
'x-bili-signature-nonce': str(random.randint(0, 999999999)),
'x-bili-signature-version': '1.0',
'x-bili-timestamp': str(int(datetime.datetime.now().timestamp())),
}
str_to_sign = '\n'.join(
f'{key}:{value}'
for key, value in headers.items()
)
signature = hmac.new(
cfg.open_live_access_key_secret.encode('utf-8'), str_to_sign.encode('utf-8'), hashlib.sha256
).hexdigest()
headers['Authorization'] = signature
headers['Content-Type'] = 'application/json'
headers['Accept'] = 'application/json'
try:
req_ctx_mgr = utils.request.http_session.post(url, headers=headers, data=body_bytes)
return await _read_response(req_ctx_mgr)
except TransportError:
logger.exception('Request open live failed:')
raise
except BusinessError as e:
logger.warning('Request open live failed: %s', e)
if e.code == 7007:
_error_auth_code_cache[auth_code] = True
raise
async def _read_response(req_ctx_mgr: AsyncContextManager[aiohttp.ClientResponse]) -> dict:
try:
async with req_ctx_mgr as r:
r.raise_for_status()
data = await r.json()
code = data['code']
if code != 0:
raise BusinessError(data)
return data
except (aiohttp.ClientError, asyncio.TimeoutError) as e:
raise TransportError(f'{type(e).__name__}: {e}')
def _validate_auth_code(auth_code):
if (
auth_code in _error_auth_code_cache
# 我也不知道是不是一定是这个格式,先这么处理
or not re.fullmatch(r'[0-9A-Z]{12,14}', auth_code)
):
raise BusinessError({
'code': 7007,
'message': 'oioioi你的身份码错误了别再重试了',
'request_id': '0',
'data': None
})
class _OpenLiveHandlerBase(api.base.ApiHandler):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.res: Optional[dict] = None
def prepare(self):
super().prepare()
if not isinstance(self.json_args, dict):
raise tornado.web.MissingArgumentError('body')
if 'app_id' in self.json_args:
cfg = config.get_config()
self.json_args['app_id'] = cfg.open_live_app_id
logger.info('client=%s requesting open live, cls=%s', self.request.remote_ip, type(self).__name__)
class _PublicHandlerBase(_OpenLiveHandlerBase):
"""外部接口,如果配置了开放平台,则直接请求,否则转发请求到公共服务器的内部接口"""
_OPEN_LIVE_URL: str
_COMMON_SERVER_URL: str
async def post(self):
try:
self.res = await request_open_live_or_common_server(
self._OPEN_LIVE_URL, self._COMMON_SERVER_URL, self.json_args
)
except TransportError:
raise tornado.web.HTTPError(500)
except BusinessError as e:
self.res = e.data
self.write(self.res)
class _PrivateHandlerBase(_OpenLiveHandlerBase):
"""内部接口,如果配置了开放平台,则直接请求,否则响应错误"""
_OPEN_LIVE_URL: str
async def post(self):
cfg = config.get_config()
if not cfg.is_open_live_configured:
raise tornado.web.HTTPError(501)
try:
self.res = await _request_open_live(self._OPEN_LIVE_URL, self.json_args)
except TransportError:
raise tornado.web.HTTPError(500)
except BusinessError as e:
self.res = e.data
self.write(self.res)
class _StartGameMixin(_OpenLiveHandlerBase):
_OPEN_LIVE_URL = START_GAME_OPEN_LIVE_URL
_COMMON_SERVER_URL = START_GAME_COMMON_SERVER_URL
async def post(self):
await super().post() # noqa
if self.res is None:
return
try:
room_id = self.res['data']['anchor_info']['room_id']
except (TypeError, KeyError):
room_id = None
code = self.res['code']
logger.info('room_id=%s start game res: %s %s', room_id, code, self.res['message'])
if code == 7007:
# 身份码错误
# 让我看看是哪个混蛋把房间ID、UID当做身份码
logger.info('Auth code error! auth_code=%s', self.json_args.get('code', None))
class StartGamePublicHandler(_StartGameMixin, _PublicHandlerBase):
pass
class StartGamePrivateHandler(_StartGameMixin, _PrivateHandlerBase):
pass
class EndGamePublicHandler(_PublicHandlerBase):
_OPEN_LIVE_URL = END_GAME_OPEN_LIVE_URL
_COMMON_SERVER_URL = END_GAME_COMMON_SERVER_URL
class EndGamePrivateHandler(_PrivateHandlerBase):
_OPEN_LIVE_URL = END_GAME_OPEN_LIVE_URL
class GameHeartbeatPublicHandler(_PublicHandlerBase):
_OPEN_LIVE_URL = GAME_HEARTBEAT_OPEN_LIVE_URL
_COMMON_SERVER_URL = GAME_HEARTBEAT_COMMON_SERVER_URL
class GameHeartbeatPrivateHandler(_PrivateHandlerBase):
_OPEN_LIVE_URL = GAME_HEARTBEAT_OPEN_LIVE_URL
ROUTES = [
(r'/api/open_live/start_game', StartGamePublicHandler),
(r'/api/internal/open_live/start_game', StartGamePrivateHandler),
(r'/api/open_live/end_game', EndGamePublicHandler),
(r'/api/internal/open_live/end_game', EndGamePrivateHandler),
(r'/api/open_live/game_heartbeat', GameHeartbeatPublicHandler),
(r'/api/internal/open_live/game_heartbeat', GameHeartbeatPrivateHandler),
]