mirror of
https://github.com/nonebot/nonebot2.git
synced 2024-12-01 09:34:46 +08:00
447 lines
14 KiB
Python
447 lines
14 KiB
Python
import re
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import sys
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import hmac
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import json
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import asyncio
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from typing import Any, Dict, Union, Optional, TYPE_CHECKING
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import httpx
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from nonebot.log import logger
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from nonebot.config import Config
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from nonebot.typing import overrides
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from nonebot.message import handle_event
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from nonebot.adapters import Bot as BaseBot
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from nonebot.exception import RequestDenied
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from .utils import log, escape
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from .message import Message, MessageSegment
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from .event import Reply, Event, MessageEvent, get_event_model
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from .exception import NetworkError, ApiNotAvailable, ActionFailed
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if TYPE_CHECKING:
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from nonebot.drivers import Driver, WebSocket
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def get_auth_bearer(access_token: Optional[str] = None) -> Optional[str]:
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if not access_token:
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return None
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scheme, _, param = access_token.partition(" ")
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if scheme.lower() not in ["bearer", "token"]:
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raise RequestDenied(401, "Not authenticated")
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return param
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async def _check_reply(bot: "Bot", event: "Event"):
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"""
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:说明:
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检查消息中存在的回复，去除并赋值 ``event.reply``, ``event.to_me``
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:参数:
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* ``bot: Bot``: Bot 对象
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* ``event: Event``: Event 对象
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"""
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if not isinstance(event, MessageEvent):
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return
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try:
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index = list(map(lambda x: x.type == "reply",
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event.message)).index(True)
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except ValueError:
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return
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msg_seg = event.message[index]
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event.reply = Reply.parse_obj(await
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bot.get_msg(message_id=msg_seg.data["id"]))
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# ensure string comparation
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if str(event.reply.sender.user_id) == str(event.self_id):
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event.to_me = True
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del event.message[index]
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if len(event.message) > index and event.message[index].type == "at":
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del event.message[index]
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if len(event.message) > index and event.message[index].type == "text":
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event.message[index].data["text"] = event.message[index].data[
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"text"].lstrip()
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if not event.message[index].data["text"]:
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del event.message[index]
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if not event.message:
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event.message.append(MessageSegment.text(""))
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def _check_at_me(bot: "Bot", event: "Event"):
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"""
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:说明:
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检查消息开头或结尾是否存在 @机器人，去除并赋值 ``event.to_me``
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:参数:
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* ``bot: Bot``: Bot 对象
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* ``event: Event``: Event 对象
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"""
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if not isinstance(event, MessageEvent):
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return
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if event.message_type == "private":
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event.to_me = True
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else:
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at_me_seg = MessageSegment.at(event.self_id)
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# check the first segment
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if event.message[0] == at_me_seg:
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event.to_me = True
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del event.message[0]
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if event.message and event.message[0].type == "text":
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event.message[0].data["text"] = event.message[0].data[
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"text"].lstrip()
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if not event.message[0].data["text"]:
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del event.message[0]
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if event.message and event.message[0] == at_me_seg:
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del event.message[0]
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if event.message and event.message[0].type == "text":
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event.message[0].data["text"] = event.message[0].data[
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"text"].lstrip()
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if not event.message[0].data["text"]:
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del event.message[0]
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if not event.to_me:
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# check the last segment
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i = -1
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last_msg_seg = event.message[i]
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if last_msg_seg.type == "text" and \
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not last_msg_seg.data["text"].strip() and \
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len(event.message) >= 2:
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i -= 1
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last_msg_seg = event.message[i]
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if last_msg_seg == at_me_seg:
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event.to_me = True
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del event.message[i:]
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if not event.message:
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event.message.append(MessageSegment.text(""))
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def _check_nickname(bot: "Bot", event: "Event"):
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"""
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:说明:
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检查消息开头是否存在，去除并赋值 ``event.to_me``
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:参数:
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* ``bot: Bot``: Bot 对象
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* ``event: Event``: Event 对象
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"""
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if not isinstance(event, MessageEvent):
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return
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first_msg_seg = event.message[0]
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if first_msg_seg.type != "text":
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return
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first_text = first_msg_seg.data["text"]
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nicknames = set(filter(lambda n: n, bot.config.nickname))
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if nicknames:
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# check if the user is calling me with my nickname
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nickname_regex = "|".join(nicknames)
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m = re.search(rf"^({nickname_regex})([\s,，]*|$)", first_text,
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re.IGNORECASE)
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if m:
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nickname = m.group(1)
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log("DEBUG", f"User is calling me {nickname}")
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event.to_me = True
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first_msg_seg.data["text"] = first_text[m.end():]
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def _handle_api_result(result: Optional[Dict[str, Any]]) -> Any:
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"""
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:说明:
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处理 API 请求返回值。
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:参数:
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* ``result: Optional[Dict[str, Any]]``: API 返回数据
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:返回:
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- ``Any``: API 调用返回数据
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:异常:
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- ``ActionFailed``: API 调用失败
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"""
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if isinstance(result, dict):
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if result.get("status") == "failed":
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raise ActionFailed(**result)
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return result.get("data")
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class ResultStore:
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_seq = 1
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_futures: Dict[int, asyncio.Future] = {}
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@classmethod
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def get_seq(cls) -> int:
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s = cls._seq
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cls._seq = (cls._seq + 1) % sys.maxsize
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return s
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@classmethod
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def add_result(cls, result: Dict[str, Any]):
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if isinstance(result.get("echo"), dict) and \
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isinstance(result["echo"].get("seq"), int):
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future = cls._futures.get(result["echo"]["seq"])
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if future:
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future.set_result(result)
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@classmethod
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async def fetch(cls, seq: int, timeout: Optional[float]) -> Dict[str, Any]:
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future = asyncio.get_event_loop().create_future()
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cls._futures[seq] = future
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try:
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return await asyncio.wait_for(future, timeout)
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except asyncio.TimeoutError:
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raise NetworkError("WebSocket API call timeout") from None
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finally:
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del cls._futures[seq]
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class Bot(BaseBot):
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"""
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CQHTTP 协议 Bot 适配。继承属性参考 `BaseBot <./#class-basebot>`_ 。
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"""
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def __init__(self,
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driver: "Driver",
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connection_type: str,
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config: Config,
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self_id: str,
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*,
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websocket: Optional["WebSocket"] = None):
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super().__init__(driver,
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connection_type,
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config,
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self_id,
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websocket=websocket)
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@property
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@overrides(BaseBot)
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def type(self) -> str:
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"""
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- 返回: ``"cqhttp"``
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"""
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return "cqhttp"
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@classmethod
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@overrides(BaseBot)
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async def check_permission(cls, driver: "Driver", connection_type: str,
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headers: dict, body: Optional[dict]) -> str:
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"""
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:说明:
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CQHTTP (OneBot) 协议鉴权。参考 `鉴权 <https://github.com/howmanybots/onebot/blob/master/v11/specs/communication/authorization.md>`_
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"""
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x_self_id = headers.get("x-self-id")
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x_signature = headers.get("x-signature")
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token = get_auth_bearer(headers.get("authorization"))
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# 检查连接方式
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if connection_type not in ["http", "websocket"]:
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log("WARNING", "Unsupported connection type")
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raise RequestDenied(405, "Unsupported connection type")
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# 检查self_id
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if not x_self_id:
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log("WARNING", "Missing X-Self-ID Header")
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raise RequestDenied(400, "Missing X-Self-ID Header")
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# 检查签名
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secret = driver.config.secret
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if secret and connection_type == "http":
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if not x_signature:
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log("WARNING", "Missing Signature Header")
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raise RequestDenied(401, "Missing Signature")
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sig = hmac.new(secret.encode("utf-8"),
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json.dumps(body).encode(), "sha1").hexdigest()
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if x_signature != "sha1=" + sig:
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log("WARNING", "Signature Header is invalid")
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raise RequestDenied(403, "Signature is invalid")
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access_token = driver.config.access_token
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if access_token and access_token != token:
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log(
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"WARNING", "Authorization Header is invalid"
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if token else "Missing Authorization Header")
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raise RequestDenied(
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403, "Authorization Header is invalid"
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if token else "Missing Authorization Header")
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return str(x_self_id)
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@overrides(BaseBot)
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async def handle_message(self, message: dict):
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"""
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:说明:
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调用 `_check_reply <#async-check-reply-bot-event>`_, `_check_at_me <#check-at-me-bot-event>`_, `_check_nickname <#check-nickname-bot-event>`_ 处理事件并转换为 `Event <#class-event>`_
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"""
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if not message:
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return
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if "post_type" not in message:
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ResultStore.add_result(message)
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return
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try:
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post_type = message['post_type']
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detail_type = message.get(f"{post_type}_type")
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detail_type = f".{detail_type}" if detail_type else ""
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sub_type = message.get("sub_type")
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sub_type = f".{sub_type}" if sub_type else ""
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models = get_event_model(post_type + detail_type + sub_type)
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for model in models:
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try:
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event = model.parse_obj(message)
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break
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except Exception as e:
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log("DEBUG", "Event Parser Error", e)
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else:
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event = Event.parse_obj(message)
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# Check whether user is calling me
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await _check_reply(self, event)
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_check_at_me(self, event)
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_check_nickname(self, event)
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await handle_event(self, event)
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except Exception as e:
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logger.opt(colors=True, exception=e).error(
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f"<r><bg #f8bbd0>Failed to handle event. Raw: {message}</bg #f8bbd0></r>"
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)
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@overrides(BaseBot)
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async def call_api(self, api: str, **data) -> Any:
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"""
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:说明:
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调用 CQHTTP 协议 API
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:参数:
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* ``api: str``: API 名称
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* ``**data: Any``: API 参数
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:返回:
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- ``Any``: API 调用返回数据
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:异常:
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- ``NetworkError``: 网络错误
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- ``ActionFailed``: API 调用失败
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"""
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if "self_id" in data:
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self_id = data.pop("self_id")
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if self_id:
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bot = self.driver.bots[str(self_id)]
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return await bot.call_api(api, **data)
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log("DEBUG", f"Calling API <y>{api}</y>")
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if self.connection_type == "websocket":
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seq = ResultStore.get_seq()
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await self.websocket.send({
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"action": api,
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"params": data,
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"echo": {
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"seq": seq
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}
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})
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return _handle_api_result(await ResultStore.fetch(
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seq, self.config.api_timeout))
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elif self.connection_type == "http":
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api_root = self.config.api_root.get(self.self_id)
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if not api_root:
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raise ApiNotAvailable
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elif not api_root.endswith("/"):
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api_root += "/"
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headers = {}
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if self.config.access_token is not None:
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headers["Authorization"] = "Bearer " + self.config.access_token
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try:
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async with httpx.AsyncClient(headers=headers) as client:
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response = await client.post(
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api_root + api,
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json=data,
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timeout=self.config.api_timeout)
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if 200 <= response.status_code < 300:
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result = response.json()
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return _handle_api_result(result)
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raise NetworkError(f"HTTP request received unexpected "
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f"status code: {response.status_code}")
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except httpx.InvalidURL:
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raise NetworkError("API root url invalid")
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except httpx.HTTPError:
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raise NetworkError("HTTP request failed")
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@overrides(BaseBot)
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async def send(self,
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event: Event,
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message: Union[str, Message, MessageSegment],
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at_sender: bool = False,
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**kwargs) -> Any:
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"""
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:说明:
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根据 ``event`` 向触发事件的主体发送消息。
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:参数:
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* ``event: Event``: Event 对象
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* ``message: Union[str, Message, MessageSegment]``: 要发送的消息
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* ``at_sender: bool``: 是否 @ 事件主体
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* ``**kwargs``: 覆盖默认参数
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:返回:
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- ``Any``: API 调用返回数据
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:异常:
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- ``ValueError``: 缺少 ``user_id``, ``group_id``
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- ``NetworkError``: 网络错误
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- ``ActionFailed``: API 调用失败
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"""
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message = escape(message) if isinstance(message, str) else message
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msg = message if isinstance(message, Message) else Message(message)
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at_sender = at_sender and getattr(event, "user_id", None)
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params = {}
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if getattr(event, "user_id", None):
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params["user_id"] = getattr(event, "user_id")
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if getattr(event, "group_id", None):
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params["group_id"] = getattr(event, "group_id")
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params.update(kwargs)
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if "message_type" not in params:
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if params.get("group_id", None):
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params["message_type"] = "group"
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elif params.get("user_id", None):
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params["message_type"] = "private"
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else:
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raise ValueError("Cannot guess message type to reply!")
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if at_sender and params["message_type"] != "private":
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params["message"] = MessageSegment.at(params["user_id"]) + \
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MessageSegment.text(" ") + msg
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else:
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params["message"] = msg
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return await self.send_msg(**params)
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