mirror of
https://github.com/xfgryujk/blivechat.git
synced 2024-12-26 21:00:15 +08:00
677 lines
23 KiB
Python
677 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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import asyncio
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import base64
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import dataclasses
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import datetime
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import enum
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import functools
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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 random
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import re
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from typing import *
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import Crypto.Cipher.AES as cry_aes # noqa
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import Crypto.Util.Padding as cry_pad # noqa
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import aiohttp
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import cachetools
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import config
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import utils.request
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logger = logging.getLogger(__name__)
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NO_TRANSLATE_TEXTS = {
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'草', '草草', '草草草', '草生', '大草原', '上手', '上手上手', '理解', '理解理解', '天才', '天才天才',
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'强', '余裕', '余裕余裕', '大丈夫', '再放送', '放送事故', '清楚', '清楚清楚'
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}
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_translate_providers: List['TranslateProvider'] = []
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# text -> res
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_translate_cache: Optional[cachetools.LRUCache] = None
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# 正在翻译的Future，text -> Future
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_text_future_map: Dict[str, asyncio.Future] = {}
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# 正在翻译的任务队列，索引是优先级
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_task_queues: List['asyncio.Queue[TranslateTask]'] = []
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class Priority(enum.IntEnum):
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HIGH = 0
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NORMAL = 1
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@dataclasses.dataclass
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class TranslateTask:
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priority: Priority
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text: str
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future: 'asyncio.Future[Optional[str]]'
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remain_retry_count: int
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def init():
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cfg = config.get_config()
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global _translate_cache, _task_queues
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_translate_cache = cachetools.LRUCache(cfg.translation_cache_size)
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# 总队列长度会超过translate_max_queue_size，不用这么严格
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_task_queues = [asyncio.Queue(cfg.translate_max_queue_size) for _ in range(len(Priority))]
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asyncio.get_running_loop().create_task(_do_init())
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async def _do_init():
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cfg = config.get_config()
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if not cfg.enable_translate:
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return
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providers = []
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for trans_cfg in cfg.translator_configs:
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provider = create_translate_provider(trans_cfg)
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if provider is not None:
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providers.append(provider)
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await asyncio.gather(*(provider.init() for provider in providers))
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global _translate_providers
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_translate_providers = providers
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def create_translate_provider(cfg):
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type_ = cfg['type']
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if type_ == 'TencentTranslateFree':
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return TencentTranslateFree(
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cfg['query_interval'], cfg['source_language'], cfg['target_language']
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)
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elif type_ == 'TencentTranslate':
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return TencentTranslate(
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cfg['query_interval'], cfg['source_language'], cfg['target_language'],
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cfg['secret_id'], cfg['secret_key'], cfg['region']
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)
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elif type_ == 'BaiduTranslate':
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return BaiduTranslate(
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cfg['query_interval'], cfg['source_language'], cfg['target_language'],
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cfg['app_id'], cfg['secret']
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)
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return None
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def need_translate(text):
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text = text.strip()
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# 没有中文，平时打不出的字不管
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if not any(0x4E00 <= ord(c) <= 0x9FFF for c in text):
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return False
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# 含有日文假名
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if any(0x3040 <= ord(c) <= 0x30FF for c in text):
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return False
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# 弹幕同传
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if '【' in text:
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return False
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# 中日双语
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if text in NO_TRANSLATE_TEXTS:
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return False
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return True
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def get_translation_from_cache(text):
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key = text.strip().lower()
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return _translate_cache.get(key, None)
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def translate(text, priority=Priority.NORMAL) -> Awaitable[Optional[str]]:
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key = text.strip().lower()
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# 如果已有正在翻译的future则返回，防止重复翻译
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future = _text_future_map.get(key, None)
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if future is not None:
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return future
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# 否则创建一个翻译任务
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future = asyncio.get_running_loop().create_future()
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# 查缓存
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res = _translate_cache.get(key, None)
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if res is not None:
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future.set_result(res)
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return future
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task = TranslateTask(
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priority=priority,
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text=text,
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future=future,
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remain_retry_count=3 if priority == Priority.HIGH else 1
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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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_text_future_map[key] = future
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future.add_done_callback(functools.partial(_on_translate_done, key))
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return future
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def _on_translate_done(key, future):
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_text_future_map.pop(key, None)
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# 缓存
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try:
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res = future.result()
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except Exception: # noqa
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return
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if res is None:
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return
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_translate_cache[key] = res
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def _push_task(task: TranslateTask):
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if not _has_available_translate_provider():
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return False
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queue = _task_queues[task.priority]
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if not queue.full():
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queue.put_nowait(task)
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return True
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if task.priority != Priority.HIGH:
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return False
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# 高优先级的尝试降级，挤掉低优先级的任务
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queue = _task_queues[Priority.NORMAL]
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if queue.full():
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lower_task = queue.get_nowait()
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lower_task.future.set_result(None)
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queue.put_nowait(task)
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return True
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async def _pop_task() -> TranslateTask:
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# 按优先级遍历，看是否已经有任务
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for queue in _task_queues:
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if not queue.empty():
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return queue.get_nowait()
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done_future_set, pending_future_set = await asyncio.wait(
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[asyncio.create_task(queue.get()) for queue in _task_queues],
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return_when=asyncio.FIRST_COMPLETED
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)
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for future in pending_future_set:
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future.cancel()
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# 如果有多个队列都取到任务了，只返回优先级最高的那一个，剩下的放回队列
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assert len(done_future_set) != 0
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tasks = [await future for future in done_future_set]
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if len(tasks) > 1:
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tasks.sort(key=lambda task_: task_.priority)
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res = None
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for task in tasks:
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if res is None:
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res = task
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continue
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if not _push_task(task):
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task.future.set_result(None)
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return res
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def _cancel_all_tasks_if_no_available_translate_provider():
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if _has_available_translate_provider():
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return
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logger.warning('No available translate provider')
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for queue in _task_queues:
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while not queue.empty():
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task = queue.get_nowait()
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task.future.set_result(None)
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def _has_available_translate_provider():
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return any(provider.is_available for provider in _translate_providers)
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class TranslateProvider:
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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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async def init(self):
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asyncio.create_task(self._translate_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 True
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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_translate_provider()
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async def _translate_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_translate_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._translate_wrapper(task)
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cost_time = (datetime.datetime.now() - start_time).total_seconds()
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# 频率限制
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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 _translate_wrapper(self, task: TranslateTask) -> Optional[str]:
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try:
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exc = None
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task.remain_retry_count -= 1
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res = await self._do_translate(task.text)
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except BaseException as e:
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exc = e
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res = None
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if res is not None:
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task.future.set_result(res)
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return res
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if task.remain_retry_count > 0:
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# 还可以重试则放回队列
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if not _push_task(task):
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task.future.set_result(None)
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else:
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# 否则设置异常或None结果
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if exc is not None:
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task.future.set_exception(exc)
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else:
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task.future.set_result(None)
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return None
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async def _do_translate(self, text) -> Optional[str]:
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raise NotImplementedError
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class TencentTranslateFree(TranslateProvider):
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def __init__(self, query_interval, source_language, target_language):
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super().__init__(query_interval)
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self._be_available_event.clear() # _do_init之后才可用
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self._source_language = source_language
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self._target_language = target_language
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self._server_time_delta = 0
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self._uc_key = self._uc_iv = ''
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self._qtv = self._qtk = ''
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self._reinit_future = None
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# 连续失败的次数
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self._fail_count = 0
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async def init(self):
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if not await super().init():
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return False
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self._reinit_future = asyncio.create_task(self._reinit_coroutine())
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return True
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async def _do_init(self):
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try:
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async with utils.request.http_session.get('https://fanyi.qq.com/') as r:
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if r.status != 200:
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logger.warning('TencentTranslateFree init request failed: status=%d %s', r.status, r.reason)
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return False
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html = await r.text()
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try:
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server_time = r.headers['Date']
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server_time = datetime.datetime.strptime(server_time, '%a, %d %b %Y %H:%M:%S GMT')
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server_time = server_time.replace(tzinfo=datetime.timezone.utc).timestamp()
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self._server_time_delta = int((datetime.datetime.now().timestamp() - server_time) * 1000)
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except (KeyError, ValueError):
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self._server_time_delta = 0
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except (aiohttp.ClientError, asyncio.TimeoutError):
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logger.exception('TencentTranslateFree init error:')
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return False
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# 获取token URL
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m = re.search(r"""\breauthuri\s*=\s*['"](.+?)['"]""", html)
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if m is None:
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logger.exception('TencentTranslateFree init failed: reauthuri not found')
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return False
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reauthuri = m[1]
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# 获取验证用的key、iv
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m = re.search(r"""\s*=\s*['"]((?:\w+\|\w+-)+\w+\|\w+)['"]""", html)
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if m is None:
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logger.exception('TencentTranslateFree init failed: initial global variables not found')
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return False
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uc_key = None
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uc_iv = None
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for item in m[1].split('-'):
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key, _, value = item.partition('|')
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if key == 'a137':
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uc_key = value
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elif key == 'E74':
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uc_iv = value
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if uc_key is not None and uc_iv is not None:
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break
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# 获取token
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try:
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async with utils.request.http_session.post('https://fanyi.qq.com/api/' + reauthuri) as r:
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if r.status != 200:
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logger.warning('TencentTranslateFree init request failed: reauthuri=%s, status=%d %s',
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reauthuri, r.status, r.reason)
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return False
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data = await r.json()
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except (aiohttp.ClientError, asyncio.TimeoutError):
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logger.exception('TencentTranslateFree init error:')
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return False
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qtv = data.get('qtv', None)
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if qtv is None:
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logger.warning('TencentTranslateFree init failed: qtv not found')
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return False
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qtk = data.get('qtk', None)
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if qtk is None:
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logger.warning('TencentTranslateFree init failed: qtk not found')
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return False
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self._uc_key = uc_key
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self._uc_iv = uc_iv
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self._qtv = qtv
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self._qtk = qtk
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self._on_availability_change()
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return True
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async def _reinit_coroutine(self):
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while True:
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logger.debug('TencentTranslateFree reinit')
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start_time = datetime.datetime.now()
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try:
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await self._do_init()
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except Exception: # noqa
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pass
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cost_time = (datetime.datetime.now() - start_time).total_seconds()
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await asyncio.sleep(30 - cost_time)
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@property
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def is_available(self):
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return '' not in (self._uc_key, self._uc_iv, self._qtv, self._qtk) and super().is_available
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async def _translate_wrapper(self, task: TranslateTask) -> Optional[str]:
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res = await super()._translate_wrapper(task)
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if res is not None:
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self._fail_count = 0
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else:
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self._on_fail()
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return res
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async def _do_translate(self, text) -> Optional[str]:
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try:
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async with utils.request.http_session.post(
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'https://fanyi.qq.com/api/translate',
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headers={
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'Referer': 'https://fanyi.qq.com/',
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'uc': self._get_uc()
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},
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data={
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'source': self._source_language,
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'target': self._target_language,
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'sourceText': text,
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'qtv': self._qtv,
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'qtk': self._qtk
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}
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) as r:
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if r.status != 200:
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logger.warning('TencentTranslateFree request failed: status=%d %s', r.status, r.reason)
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return None
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self._update_uc_key(r)
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data = await r.json()
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except (aiohttp.ClientError, asyncio.TimeoutError):
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return None
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if data['errCode'] != 0:
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logger.warning('TencentTranslateFree failed: %d %s', data['errCode'], data['errMsg'])
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return None
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res = ''.join(record['targetText'] for record in data['translate']['records'])
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if res == '' and text.strip() != '':
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# qtv、qtk过期
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logger.info('TencentTranslateFree result is empty %s', data)
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return None
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return res
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def _get_uc(self):
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user_actions = self._gen_user_actions()
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cur_timestamp = str(int(datetime.datetime.now().timestamp() * 1000))
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server_time_delta = str(self._server_time_delta)
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uc = '|'.join([user_actions, cur_timestamp, server_time_delta])
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aes = cry_aes.new(self._uc_key.encode('utf-8'), cry_aes.MODE_CBC, self._uc_iv.encode('utf-8'))
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uc = cry_pad.pad(uc.encode('utf-8'), aes.block_size, 'pkcs7')
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uc = aes.encrypt(uc)
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uc = base64.b64encode(uc).decode('utf-8')
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return uc
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@staticmethod
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def _gen_user_actions():
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# 1：点击翻译；2：源输入框聚焦或失去焦点；3：点击源语言列表；4：点击交换语言；5：点击目标语言列表；6：源输入框输入、粘贴
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user_actions = []
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if random.randint(1, 5) == 1:
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for i in range(random.randint(1, 2)):
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user_actions.append('2')
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user_actions.append('6')
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for i in range(random.randint(0, 6)):
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user_actions.append(random.choice('26'))
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if random.randint(1, 5) == 1:
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user_actions.append('1')
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return ''.join(user_actions)
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def _update_uc_key(self, r):
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try:
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hf_f = r.headers['f']
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hf_ts = int(r.headers['ts'])
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except (KeyError, ValueError):
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return
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cur_timestamp = int(datetime.datetime.now().timestamp() * 1000)
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hf_f = base64.b64decode(hf_f.encode('utf-8')).decode('utf-8')
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pos = int(hf_f[72: 72 + 4])
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uc_key = hf_f[pos: pos + 16]
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uc_iv = hf_f[pos + 16: pos + 16 + 16]
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self._server_time_delta = cur_timestamp - hf_ts
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self._uc_key = uc_key
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self._uc_iv = uc_iv
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def _on_fail(self):
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self._fail_count += 1
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# 为了可靠性，连续失败5次时冷却直到下次重新init
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if self._fail_count >= 5:
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self._cool_down()
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def _cool_down(self):
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logger.info('TencentTranslateFree is cooling down')
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# 下次_do_init后恢复
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self._uc_key = self._uc_iv = ''
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self._qtv = self._qtk = ''
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||
self._fail_count = 0
|
||
|
||
self._on_availability_change()
|
||
|
||
|
||
class TencentTranslate(TranslateProvider):
|
||
def __init__(self, query_interval, source_language, target_language,
|
||
secret_id, secret_key, region):
|
||
super().__init__(query_interval)
|
||
self._source_language = source_language
|
||
self._target_language = target_language
|
||
self._secret_id = secret_id
|
||
self._secret_key = secret_key
|
||
self._region = region
|
||
|
||
self._cool_down_timer_handle = None
|
||
|
||
@property
|
||
def is_available(self):
|
||
return self._cool_down_timer_handle is None and super().is_available
|
||
|
||
async def _do_translate(self, text) -> Optional[str]:
|
||
try:
|
||
async with self._request_tencent_cloud(
|
||
'TextTranslate',
|
||
'2018-03-21',
|
||
{
|
||
'SourceText': text,
|
||
'Source': self._source_language,
|
||
'Target': self._target_language,
|
||
'ProjectId': 0
|
||
}
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning('TencentTranslate request failed: status=%d %s', r.status, r.reason)
|
||
return None
|
||
data = (await r.json())['Response']
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
return None
|
||
error = data.get('Error', None)
|
||
if error is not None:
|
||
logger.warning('TencentTranslate failed: %s %s, RequestId=%s', error['Code'],
|
||
error['Message'], data['RequestId'])
|
||
self._on_fail(error['Code'])
|
||
return None
|
||
return data['TargetText']
|
||
|
||
def _request_tencent_cloud(self, action, version, body):
|
||
body_bytes = json.dumps(body).encode('utf-8')
|
||
|
||
canonical_headers = 'content-type:application/json; charset=utf-8\nhost:tmt.tencentcloudapi.com\n'
|
||
signed_headers = 'content-type;host'
|
||
hashed_request_payload = hashlib.sha256(body_bytes).hexdigest()
|
||
canonical_request = f'POST\n/\n\n{canonical_headers}\n{signed_headers}\n{hashed_request_payload}'
|
||
|
||
request_timestamp = int(datetime.datetime.now().timestamp())
|
||
date = datetime.datetime.utcfromtimestamp(request_timestamp).strftime('%Y-%m-%d')
|
||
credential_scope = f'{date}/tmt/tc3_request'
|
||
hashed_canonical_request = hashlib.sha256(canonical_request.encode('utf-8')).hexdigest()
|
||
string_to_sign = f'TC3-HMAC-SHA256\n{request_timestamp}\n{credential_scope}\n{hashed_canonical_request}'
|
||
|
||
def sign(key, msg):
|
||
return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()
|
||
|
||
secret_date = sign(('TC3' + self._secret_key).encode('utf-8'), date)
|
||
secret_service = sign(secret_date, 'tmt')
|
||
secret_signing = sign(secret_service, 'tc3_request')
|
||
signature = hmac.new(secret_signing, string_to_sign.encode('utf-8'), hashlib.sha256).hexdigest()
|
||
|
||
authorization = (
|
||
f'TC3-HMAC-SHA256 Credential={self._secret_id}/{credential_scope}, '
|
||
f'SignedHeaders={signed_headers}, Signature={signature}'
|
||
)
|
||
|
||
headers = {
|
||
'Authorization': authorization,
|
||
'Content-Type': 'application/json; charset=utf-8',
|
||
'X-TC-Action': action,
|
||
'X-TC-Version': version,
|
||
'X-TC-Timestamp': str(request_timestamp),
|
||
'X-TC-Region': self._region
|
||
}
|
||
|
||
return utils.request.http_session.post('https://tmt.tencentcloudapi.com/', headers=headers, data=body_bytes)
|
||
|
||
def _on_fail(self, code):
|
||
if self._cool_down_timer_handle is not None:
|
||
return
|
||
|
||
sleep_time = 0
|
||
if code == 'FailedOperation.NoFreeAmount':
|
||
# 下个月恢复免费额度
|
||
cur_time = datetime.datetime.now()
|
||
year = cur_time.year
|
||
month = cur_time.month + 1
|
||
if month > 12:
|
||
year += 1
|
||
month = 1
|
||
next_month_time = datetime.datetime(year, month, 1, minute=5)
|
||
sleep_time = (next_month_time - cur_time).total_seconds()
|
||
# Python 3.8之前不能超过一天
|
||
sleep_time = min(sleep_time, 24 * 60 * 60 - 1)
|
||
elif code in ('FailedOperation.ServiceIsolate', 'LimitExceeded'):
|
||
# 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_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 BaiduTranslate(TranslateProvider):
|
||
def __init__(self, query_interval, source_language, target_language,
|
||
app_id, secret):
|
||
super().__init__(query_interval)
|
||
self._source_language = source_language
|
||
self._target_language = target_language
|
||
self._app_id = app_id
|
||
self._secret = secret
|
||
|
||
self._cool_down_timer_handle = None
|
||
|
||
@property
|
||
def is_available(self):
|
||
return self._cool_down_timer_handle is None and super().is_available
|
||
|
||
async def _do_translate(self, text) -> Optional[str]:
|
||
try:
|
||
async with utils.request.http_session.post(
|
||
'https://fanyi-api.baidu.com/api/trans/vip/translate',
|
||
data=self._add_sign({
|
||
'q': text,
|
||
'from': self._source_language,
|
||
'to': self._target_language,
|
||
'appid': self._app_id,
|
||
'salt': random.randint(1, 999999999)
|
||
})
|
||
) as r:
|
||
if r.status != 200:
|
||
logger.warning('BaiduTranslate request failed: status=%d %s', r.status, r.reason)
|
||
return None
|
||
data = await r.json()
|
||
except (aiohttp.ClientConnectionError, asyncio.TimeoutError):
|
||
return None
|
||
error_code = data.get('error_code', None)
|
||
if error_code is not None:
|
||
logger.warning('BaiduTranslate failed: %s %s', error_code, data['error_msg'])
|
||
self._on_fail(error_code)
|
||
return None
|
||
return ''.join(result['dst'] for result in data['trans_result'])
|
||
|
||
def _add_sign(self, data):
|
||
str_to_sign = f"{self._app_id}{data['q']}{data['salt']}{self._secret}"
|
||
sign = hashlib.md5(str_to_sign.encode('utf-8')).hexdigest()
|
||
return {**data, 'sign': sign}
|
||
|
||
def _on_fail(self, code):
|
||
if self._cool_down_timer_handle is not None:
|
||
return
|
||
|
||
sleep_time = 0
|
||
if code == '54004':
|
||
# 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_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()
|