mirror of
https://github.com/langbot-app/LangBot.git
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338 lines
12 KiB
Python
338 lines
12 KiB
Python
# 微信公众号的加解密算法与企业微信一样，所以直接使用企业微信的加解密算法文件
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import time
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import traceback
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from libs.wecom_api.WXBizMsgCrypt3 import WXBizMsgCrypt
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import xml.etree.ElementTree as ET
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from quart import Quart, request
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import hashlib
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from typing import Callable
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from .oaevent import OAEvent
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import asyncio
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xml_template = """
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<xml>
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<ToUserName><![CDATA[{to_user}]]></ToUserName>
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<FromUserName><![CDATA[{from_user}]]></FromUserName>
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<CreateTime>{create_time}</CreateTime>
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<MsgType><![CDATA[text]]></MsgType>
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<Content><![CDATA[{content}]]></Content>
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</xml>
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"""
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class OAClient:
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def __init__(self, token: str, EncodingAESKey: str, AppID: str, Appsecret: str, logger: None):
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self.token = token
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self.aes = EncodingAESKey
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self.appid = AppID
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self.appsecret = Appsecret
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self.base_url = 'https://api.weixin.qq.com'
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self.access_token = ''
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self.app = Quart(__name__)
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self.app.add_url_rule(
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'/callback/command',
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'handle_callback',
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self.handle_callback_request,
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methods=['GET', 'POST'],
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)
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self._message_handlers = {
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'example': [],
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}
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self.access_token_expiry_time = None
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self.msg_id_map = {}
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self.generated_content = {}
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self.logger = logger
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async def handle_callback_request(self):
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try:
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# 每隔100毫秒查询是否生成ai回答
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start_time = time.time()
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signature = request.args.get('signature', '')
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timestamp = request.args.get('timestamp', '')
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nonce = request.args.get('nonce', '')
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echostr = request.args.get('echostr', '')
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msg_signature = request.args.get('msg_signature', '')
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if msg_signature is None:
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await self.logger.error('msg_signature不在请求体中')
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raise Exception('msg_signature不在请求体中')
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if request.method == 'GET':
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# 校验签名
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check_str = ''.join(sorted([self.token, timestamp, nonce]))
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check_signature = hashlib.sha1(check_str.encode('utf-8')).hexdigest()
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if check_signature == signature:
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return echostr # 验证成功返回echostr
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else:
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await self.logger.error('拒绝请求')
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raise Exception('拒绝请求')
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elif request.method == 'POST':
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encryt_msg = await request.data
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wxcpt = WXBizMsgCrypt(self.token, self.aes, self.appid)
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ret, xml_msg = wxcpt.DecryptMsg(encryt_msg, msg_signature, timestamp, nonce)
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xml_msg = xml_msg.decode('utf-8')
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if ret != 0:
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await self.logger.error('消息解密失败')
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raise Exception('消息解密失败')
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message_data = await self.get_message(xml_msg)
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if message_data:
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event = OAEvent.from_payload(message_data)
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if event:
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await self._handle_message(event)
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root = ET.fromstring(xml_msg)
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from_user = root.find('FromUserName').text # 发送者
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to_user = root.find('ToUserName').text # 机器人
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timeout = 4.80
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interval = 0.1
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while True:
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content = self.generated_content.pop(message_data['MsgId'], None)
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if content:
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response_xml = xml_template.format(
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to_user=from_user,
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from_user=to_user,
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create_time=int(time.time()),
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content=content,
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)
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return response_xml
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if time.time() - start_time >= timeout:
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break
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await asyncio.sleep(interval)
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if self.msg_id_map.get(message_data['MsgId'], 1) == 3:
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# response_xml = xml_template.format(
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# to_user=from_user,
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# from_user=to_user,
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# create_time=int(time.time()),
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# content = "请求失效：暂不支持公众号超过15秒的请求，如有需求，请联系 LangBot 团队。"
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# )
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print('请求失效：暂不支持公众号超过15秒的请求，如有需求，请联系 LangBot 团队。')
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return ''
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except Exception:
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await self.logger.error(f'handle_callback_request失败: {traceback.format_exc()}')
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traceback.print_exc()
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async def get_message(self, xml_msg: str):
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root = ET.fromstring(xml_msg)
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message_data = {
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'ToUserName': root.find('ToUserName').text,
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'FromUserName': root.find('FromUserName').text,
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'CreateTime': int(root.find('CreateTime').text),
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'MsgType': root.find('MsgType').text,
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'Content': root.find('Content').text if root.find('Content') is not None else None,
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'MsgId': int(root.find('MsgId').text) if root.find('MsgId') is not None else None,
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}
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return message_data
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async def run_task(self, host: str, port: int, *args, **kwargs):
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"""
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启动 Quart 应用。
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"""
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await self.app.run_task(host=host, port=port, *args, **kwargs)
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def on_message(self, msg_type: str):
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"""
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注册消息类型处理器。
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"""
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def decorator(func: Callable[[OAEvent], None]):
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if msg_type not in self._message_handlers:
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self._message_handlers[msg_type] = []
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self._message_handlers[msg_type].append(func)
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return func
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return decorator
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async def _handle_message(self, event: OAEvent):
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"""
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处理消息事件。
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"""
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message_id = event.message_id
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if message_id in self.msg_id_map.keys():
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self.msg_id_map[message_id] += 1
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return
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self.msg_id_map[message_id] = 1
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msg_type = event.type
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if msg_type in self._message_handlers:
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for handler in self._message_handlers[msg_type]:
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await handler(event)
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async def set_message(self, msg_id: int, content: str):
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self.generated_content[msg_id] = content
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class OAClientForLongerResponse:
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def __init__(
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self,
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token: str,
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EncodingAESKey: str,
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AppID: str,
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Appsecret: str,
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LoadingMessage: str,
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logger: None,
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):
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self.token = token
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self.aes = EncodingAESKey
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self.appid = AppID
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self.appsecret = Appsecret
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self.base_url = 'https://api.weixin.qq.com'
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self.access_token = ''
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self.app = Quart(__name__)
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self.app.add_url_rule(
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'/callback/command',
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'handle_callback',
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self.handle_callback_request,
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methods=['GET', 'POST'],
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)
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self._message_handlers = {
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'example': [],
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}
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self.access_token_expiry_time = None
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self.loading_message = LoadingMessage
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self.msg_queue = {}
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self.user_msg_queue = {}
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self.logger = logger
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async def handle_callback_request(self):
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try:
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signature = request.args.get('signature', '')
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timestamp = request.args.get('timestamp', '')
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nonce = request.args.get('nonce', '')
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echostr = request.args.get('echostr', '')
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msg_signature = request.args.get('msg_signature', '')
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if msg_signature is None:
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await self.logger.error('msg_signature不在请求体中')
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raise Exception('msg_signature不在请求体中')
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if request.method == 'GET':
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check_str = ''.join(sorted([self.token, timestamp, nonce]))
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check_signature = hashlib.sha1(check_str.encode('utf-8')).hexdigest()
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return echostr if check_signature == signature else '拒绝请求'
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elif request.method == 'POST':
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encryt_msg = await request.data
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wxcpt = WXBizMsgCrypt(self.token, self.aes, self.appid)
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ret, xml_msg = wxcpt.DecryptMsg(encryt_msg, msg_signature, timestamp, nonce)
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xml_msg = xml_msg.decode('utf-8')
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if ret != 0:
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await self.logger.error('消息解密失败')
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raise Exception('消息解密失败')
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# 解析 XML
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root = ET.fromstring(xml_msg)
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from_user = root.find('FromUserName').text
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to_user = root.find('ToUserName').text
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if self.msg_queue.get(from_user) and self.msg_queue[from_user][0]['content']:
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queue_top = self.msg_queue[from_user].pop(0)
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queue_content = queue_top['content']
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# 弹出用户消息
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if self.user_msg_queue.get(from_user) and self.user_msg_queue[from_user]:
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self.user_msg_queue[from_user].pop(0)
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response_xml = xml_template.format(
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to_user=from_user,
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from_user=to_user,
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create_time=int(time.time()),
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content=queue_content,
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)
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return response_xml
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else:
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response_xml = xml_template.format(
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to_user=from_user,
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from_user=to_user,
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create_time=int(time.time()),
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content=self.loading_message,
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)
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if self.user_msg_queue.get(from_user) and self.user_msg_queue[from_user][0]['content']:
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return response_xml
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else:
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message_data = await self.get_message(xml_msg)
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if message_data:
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event = OAEvent.from_payload(message_data)
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if event:
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self.user_msg_queue.setdefault(from_user, []).append(
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{
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'content': event.message,
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}
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)
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await self._handle_message(event)
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return response_xml
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except Exception:
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await self.logger.error(f'handle_callback_request失败: {traceback.format_exc()}')
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traceback.print_exc()
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async def get_message(self, xml_msg: str):
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root = ET.fromstring(xml_msg)
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message_data = {
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'ToUserName': root.find('ToUserName').text,
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'FromUserName': root.find('FromUserName').text,
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'CreateTime': int(root.find('CreateTime').text),
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'MsgType': root.find('MsgType').text,
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'Content': root.find('Content').text if root.find('Content') is not None else None,
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'MsgId': int(root.find('MsgId').text) if root.find('MsgId') is not None else None,
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}
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return message_data
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async def run_task(self, host: str, port: int, *args, **kwargs):
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"""
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启动 Quart 应用。
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"""
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await self.app.run_task(host=host, port=port, *args, **kwargs)
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def on_message(self, msg_type: str):
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"""
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注册消息类型处理器。
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"""
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def decorator(func: Callable[[OAEvent], None]):
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if msg_type not in self._message_handlers:
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self._message_handlers[msg_type] = []
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self._message_handlers[msg_type].append(func)
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return func
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return decorator
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async def _handle_message(self, event: OAEvent):
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"""
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处理消息事件。
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"""
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msg_type = event.type
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if msg_type in self._message_handlers:
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for handler in self._message_handlers[msg_type]:
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await handler(event)
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async def set_message(self, from_user: int, message_id: int, content: str):
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if from_user not in self.msg_queue:
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self.msg_queue[from_user] = []
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self.msg_queue[from_user].append(
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{
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'msg_id': message_id,
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'content': content,
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}
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)
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