mirror of
https://github.com/xfgryujk/blivechat.git
synced 2025-01-14 06:10:23 +08:00
350 lines
12 KiB
Python
350 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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import asyncio
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import datetime
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import hashlib
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import hmac
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import json
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import logging
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import re
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import uuid
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from typing import *
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import aiohttp
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import cachetools
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import tornado.web
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import api.base
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import config
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import services.open_live
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import utils.rate_limit
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import utils.request
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logger = logging.getLogger(__name__)
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OPEN_LIVE_BASE_URL = 'https://live-open.biliapi.com'
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START_GAME_OPEN_LIVE_URL = OPEN_LIVE_BASE_URL + '/v2/app/start'
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END_GAME_OPEN_LIVE_URL = OPEN_LIVE_BASE_URL + '/v2/app/end'
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GAME_HEARTBEAT_OPEN_LIVE_URL = OPEN_LIVE_BASE_URL + '/v2/app/heartbeat'
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GAME_BATCH_HEARTBEAT_OPEN_LIVE_URL = OPEN_LIVE_BASE_URL + '/v2/app/batchHeartbeat'
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START_GAME_COMMON_SERVER_URL = '/api/internal/open_live/start_game'
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END_GAME_COMMON_SERVER_URL = '/api/internal/open_live/end_game'
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GAME_HEARTBEAT_COMMON_SERVER_URL = '/api/internal/open_live/game_heartbeat'
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_error_auth_code_cache = cachetools.LRUCache(256)
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# 应B站要求，抓一下刷请求的人，不会用于其他用途
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auth_code_room_id_cache = cachetools.LRUCache(256)
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# 用于限制请求开放平台的频率
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_open_live_rate_limiter = utils.rate_limit.TokenBucket(8, 8)
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class TransportError(Exception):
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"""网络错误或HTTP状态码错误"""
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class BusinessError(Exception):
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"""业务返回码错误"""
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def __init__(self, data: dict):
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super().__init__(f"code={data['code']}, message={data['message']}, request_id={data['request_id']}")
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self.data = data
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@property
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def code(self) -> int:
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return self.data['code']
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async def request_open_live_or_common_server(open_live_url, common_server_url, body: dict, **kwargs) -> dict:
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"""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"""
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cfg = config.get_config()
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if cfg.is_open_live_configured:
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return await request_open_live(open_live_url, body, **kwargs)
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return await request_common_server(common_server_url, body, **kwargs)
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async def request_open_live(url, body: dict, *, ignore_rate_limit=False, **kwargs) -> dict:
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cfg = config.get_config()
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assert cfg.is_open_live_configured
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# 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
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if url == START_GAME_OPEN_LIVE_URL:
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auth_code = body.get('code', '')
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_validate_auth_code(auth_code)
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else:
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auth_code = ''
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# 频率限制，防止触发B站风控被下架
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if not _open_live_rate_limiter.try_decrease_token() and not ignore_rate_limit:
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raise BusinessError({'code': 4009, 'message': 'BLC接口访问限制', 'request_id': '0', 'data': None})
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body_bytes = json.dumps(body).encode('utf-8')
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headers = {
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'x-bili-accesskeyid': cfg.open_live_access_key_id,
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'x-bili-content-md5': hashlib.md5(body_bytes).hexdigest(),
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'x-bili-signature-method': 'HMAC-SHA256',
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'x-bili-signature-nonce': uuid.uuid4().hex,
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'x-bili-signature-version': '1.0',
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'x-bili-timestamp': str(int(datetime.datetime.now().timestamp())),
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}
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str_to_sign = '\n'.join(
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f'{key}:{value}'
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for key, value in headers.items()
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)
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signature = hmac.new(
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cfg.open_live_access_key_secret.encode('utf-8'), str_to_sign.encode('utf-8'), hashlib.sha256
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).hexdigest()
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headers['Authorization'] = signature
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headers['Content-Type'] = 'application/json'
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headers['Accept'] = 'application/json'
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try:
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req_ctx_mgr = utils.request.http_session.post(url, headers=headers, data=body_bytes, **kwargs)
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return await _read_response(req_ctx_mgr)
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except TransportError:
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logger.exception('Request open live failed:')
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raise
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except BusinessError as e:
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msg = str(e)
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if e.code == 7010:
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# 新版本日志可以截断，避免日志太长了
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msg = msg[:30] + '...'
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logger.warning('Request open live failed: %s', msg)
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if e.code == 7007:
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_error_auth_code_cache[auth_code] = True
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raise
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async def request_common_server(rel_url, body: dict, **kwargs) -> dict:
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base_url, breaker = utils.request.get_common_server_base_url_and_circuit_breaker()
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if base_url is None:
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logger.error('No available common server endpoint')
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raise TransportError('No available common server endpoint')
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url = base_url + rel_url
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with breaker:
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try:
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req_ctx_mgr = utils.request.http_session.post(url, json=body, **kwargs)
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return await _read_response(req_ctx_mgr, is_common_server=True)
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except TransportError:
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logger.exception('Request common server failed:')
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raise
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except BusinessError as e:
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logger.warning('Request common server failed: %s', e)
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raise
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async def _read_response(req_ctx_mgr: AsyncContextManager[aiohttp.ClientResponse], is_common_server=False) -> dict:
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try:
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async with req_ctx_mgr as r:
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r.raise_for_status()
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data = await r.json()
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code = data['code']
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if code != 0:
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if code == 7010 and not is_common_server:
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data['message'] += (
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' 解决方法：https://github.com/xfgryujk/blivechat/wiki/%E6%B3%A8%E6%84%8F%E4%BA%8B%E9%A1%B9%E5'
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'%92%8C%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98#%E6%8A%A5%E9%94%997010-%E8%B6%85%E8%BF%87%E4%B8%8'
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'A%E9%99%90%E5%90%8C%E4%B8%80%E4%B8%AA%E5%BA%94%E7%94%A8%E5%8D%95%E4%B8%AA%E7%9B%B4%E6%92%AD%'
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'E9%97%B4%E6%9C%80%E5%A4%9A%E5%90%8C%E6%97%B6%E6%89%93%E5%BC%805%E4%B8%AA'
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)
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raise BusinessError(data)
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return data
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except (aiohttp.ClientError, asyncio.TimeoutError) as e:
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raise TransportError(f'{type(e).__name__}: {e}')
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def _validate_auth_code(auth_code):
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if (
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auth_code in _error_auth_code_cache
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# 我也不知道是不是一定是这个格式，先这么处理
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or not re.fullmatch(r'[0-9A-Z]{12,14}', auth_code)
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):
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raise BusinessError({
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'code': 7007,
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'message': 'CNM！你的身份码错误了！别再重试了！！！！！！！！！！',
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'request_id': '0',
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'data': None
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})
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class _OpenLiveHandlerBase(api.base.ApiHandler):
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_LOG_REQUEST = True
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.res: Optional[dict] = None
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def prepare(self):
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super().prepare()
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if self.request.method == 'OPTIONS':
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return
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if not isinstance(self.json_args, dict):
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raise tornado.web.MissingArgumentError('body')
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if 'app_id' in self.json_args:
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cfg = config.get_config()
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self.json_args['app_id'] = cfg.open_live_app_id
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if self._LOG_REQUEST:
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logger.info('client=%s requesting open live, cls=%s', self.request.remote_ip, type(self).__name__)
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class _PublicHandlerBase(_OpenLiveHandlerBase):
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"""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"""
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_OPEN_LIVE_URL: str
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_COMMON_SERVER_URL: str
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async def post(self):
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try:
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self.res = await request_open_live_or_common_server(
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self._OPEN_LIVE_URL, self._COMMON_SERVER_URL, self.json_args
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)
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except TransportError:
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raise tornado.web.HTTPError(500)
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except BusinessError as e:
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self.res = e.data
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self.write(self.res)
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class _PrivateHandlerBase(_OpenLiveHandlerBase):
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"""内部接口，如果配置了开放平台，则直接请求，否则响应错误"""
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_OPEN_LIVE_URL: str
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async def post(self):
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cfg = config.get_config()
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if not cfg.is_open_live_configured:
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raise tornado.web.HTTPError(501)
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try:
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self.res = await request_open_live(self._OPEN_LIVE_URL, self.json_args)
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except TransportError:
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raise tornado.web.HTTPError(500)
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except BusinessError as e:
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self.res = e.data
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self.write(self.res)
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class _StartGameMixin(_OpenLiveHandlerBase):
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_OPEN_LIVE_URL = START_GAME_OPEN_LIVE_URL
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_COMMON_SERVER_URL = START_GAME_COMMON_SERVER_URL
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async def post(self):
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await super().post() # noqa
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if self.res is None:
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return
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auth_code = self.json_args.get('code', None)
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try:
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room_id = self.res['data']['anchor_info']['room_id']
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except (TypeError, KeyError):
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room_id = auth_code_room_id_cache.get(auth_code, None)
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else:
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auth_code_room_id_cache[auth_code] = room_id
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try:
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game_id = self.res['data']['game_info']['game_id']
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except (TypeError, KeyError):
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game_id = None
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code = self.res['code']
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msg = self.res['message']
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if code == 7010:
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# 新版本日志可以截断，避免日志太长了
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msg = msg[:10] + '...'
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logger.info(
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'client=%s room_id=%s start game res: %s %s, game_id=%s', self.request.remote_ip, room_id,
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code, msg, game_id
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)
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if code == 7007:
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# 身份码错误
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# 让我看看是哪个混蛋把房间ID、UID当做身份码
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logger.info('client=%s auth code error! auth_code=%s', self.request.remote_ip, auth_code)
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class StartGamePublicHandler(_StartGameMixin, _PublicHandlerBase):
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pass
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class StartGamePrivateHandler(_StartGameMixin, _PrivateHandlerBase):
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pass
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class EndGamePublicHandler(_PublicHandlerBase):
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_OPEN_LIVE_URL = END_GAME_OPEN_LIVE_URL
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_COMMON_SERVER_URL = END_GAME_COMMON_SERVER_URL
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class EndGamePrivateHandler(_PrivateHandlerBase):
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_OPEN_LIVE_URL = END_GAME_OPEN_LIVE_URL
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class GameHeartbeatPublicHandler(_OpenLiveHandlerBase):
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_LOG_REQUEST = False
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async def post(self):
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game_id = self.json_args.get('game_id', None)
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if not isinstance(game_id, str) or game_id == '':
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raise tornado.web.MissingArgumentError('game_id')
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try:
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self.res = await send_game_heartbeat_by_service_or_common_server(game_id)
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except TransportError as e:
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logger.error(
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'client=%s game heartbeat failed, game_id=%s, error: %s', self.request.remote_ip, game_id, e
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)
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raise tornado.web.HTTPError(500)
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except BusinessError as e:
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logger.info(
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'client=%s game heartbeat failed, game_id=%s, error: %s', self.request.remote_ip, game_id, e
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)
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self.res = e.data
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self.write(self.res)
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async def send_game_heartbeat_by_service_or_common_server(game_id):
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cfg = config.get_config()
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if cfg.is_open_live_configured:
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return await services.open_live.send_game_heartbeat(game_id)
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return await request_common_server(
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GAME_HEARTBEAT_COMMON_SERVER_URL, {'game_id': game_id}, timeout=aiohttp.ClientTimeout(total=15)
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)
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class GameHeartbeatPrivateHandler(_OpenLiveHandlerBase):
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_LOG_REQUEST = False
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async def post(self):
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cfg = config.get_config()
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if not cfg.is_open_live_configured:
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raise tornado.web.HTTPError(501)
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game_id = self.json_args.get('game_id', None)
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if not isinstance(game_id, str) or game_id == '':
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raise tornado.web.MissingArgumentError('game_id')
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try:
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self.res = await services.open_live.send_game_heartbeat(game_id)
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except TransportError as e:
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logger.error(
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'client=%s game heartbeat failed, game_id=%s, error: %s', self.request.remote_ip, game_id, e
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)
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raise tornado.web.HTTPError(500)
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except BusinessError as e:
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logger.info(
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'client=%s game heartbeat failed, game_id=%s, error: %s', self.request.remote_ip, game_id, e
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)
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self.res = e.data
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self.write(self.res)
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ROUTES = [
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(r'/api/open_live/start_game', StartGamePublicHandler),
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(r'/api/internal/open_live/start_game', StartGamePrivateHandler),
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(r'/api/open_live/end_game', EndGamePublicHandler),
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(r'/api/internal/open_live/end_game', EndGamePrivateHandler),
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(r'/api/open_live/game_heartbeat', GameHeartbeatPublicHandler),
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(r'/api/internal/open_live/game_heartbeat', GameHeartbeatPrivateHandler),
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]
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