294 lines
8.6 KiB
Python
294 lines
8.6 KiB
Python
"""
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WeChat Work (企业微信) Integration Service
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功能：
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1. 接收企业微信群聊消息事件
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2. AI 判断消息是否为有价值的信号
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3. 自动创建信号并关联到项目
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4. 推送通知给相关角色
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"""
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import asyncio
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import json
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import hashlib
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import hmac
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import base64
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import struct
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from datetime import datetime, timezone
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from typing import Any, Dict, List, Optional
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import httpx
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from sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy.future import select
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from sqlalchemy import text
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from ..models import (
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Signal, Project, Integration
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)
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from .signal_capture import ProactiveSignalCaptureService
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class WeChatWorkIntegrationService:
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"""企业微信集成服务"""
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def __init__(self, db: AsyncSession):
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self.db = db
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# 从数据库获取企业微信配置
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self.corp_id = None
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self.agent_id = None
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self.app_secret = None
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self.token = None
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self.encoding_aes_key = None
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self.tenant_id = 1
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async def load_config(self, tenant_id: int = 1):
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"""从数据库加载企业微信配置"""
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self.tenant_id = tenant_id
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result = await self.db.execute(
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select(Integration).where(
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Integration.tenant_id == tenant_id,
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Integration.type == 'wecom',
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Integration.is_active.is_(True),
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)
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)
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integration = result.scalar_one_or_none()
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if integration:
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if isinstance(integration.config, str):
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config = json.loads(integration.config) if integration.config else {}
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else:
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config = integration.config or {}
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self.corp_id = config.get('corp_id')
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self.agent_id = config.get('agent_id')
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self.app_secret = config.get('app_secret')
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self.token = config.get('token')
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self.encoding_aes_key = config.get('encoding_aes_key')
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else:
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self.corp_id = None
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self.agent_id = None
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self.app_secret = None
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self.token = None
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self.encoding_aes_key = None
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def is_configured(self) -> bool:
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"""检查是否已配置"""
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return all([
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self.corp_id,
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self.agent_id,
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self.app_secret,
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self.token,
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self.encoding_aes_key
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])
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async def save_config(
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self,
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corp_id: str,
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agent_id: str,
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app_secret: str,
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token: str,
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encoding_aes_key: str,
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tenant_id: int = 1
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):
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"""保存企业微信配置到数据库"""
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config = {
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'corp_id': corp_id,
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'agent_id': agent_id,
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'app_secret': app_secret,
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'token': token,
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'encoding_aes_key': encoding_aes_key
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}
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# 查找或创建集成记录
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result = await self.db.execute(
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select(Integration).where(
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Integration.tenant_id == tenant_id,
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Integration.type == 'wecom'
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)
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)
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integration = result.scalar_one_or_none()
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if integration:
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integration.config = config
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integration.is_active = True
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else:
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integration = Integration(
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type='wecom',
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config=config,
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is_active=True,
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tenant_id=tenant_id
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)
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self.db.add(integration)
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await self.db.commit()
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# 更新内存配置
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self.corp_id = corp_id
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self.agent_id = agent_id
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self.app_secret = app_secret
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self.token = token
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self.encoding_aes_key = encoding_aes_key
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self.tenant_id = tenant_id
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def verify_url(self, msg_signature: str, timestamp: str, nonce: str, echostr: str) -> str:
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"""
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验证企业微信事件订阅 URL
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企业微信会发送一个 GET 请求来验证 URL 有效性
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"""
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if not self.is_configured():
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raise ValueError("企业微信未配置")
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# 计算签名
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sign_str = f"{self.token}{timestamp}{nonce}"
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signature = hashlib.sha256(sign_str.encode()).hexdigest()
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if signature != msg_signature:
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raise ValueError("签名验证失败")
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# 解密 echostr
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decrypted = self._decrypt(echostr)
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return decrypted
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def verify_callback(self, msg_signature: str, timestamp: str, nonce: str, data: str) -> bool:
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"""
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验证企业微信回调签名
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"""
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if not self.token:
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return False
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# 计算签名
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sign_str = f"{self.token}{timestamp}{nonce}{data}"
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computed_signature = hashlib.sha256(sign_str.encode()).hexdigest()
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return computed_signature == msg_signature
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async def handle_message_event(
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self,
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event_data: Dict[str, Any]
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) -> Dict[str, Any]:
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"""
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处理企业微信消息事件
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支持的事件类型：
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- add_half_user: 添加企业成员
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- update_user: 更新成员信息
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- send_msg_success: 消息发送成功
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"""
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try:
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event_type = event_data.get('Event', '')
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# 企业微信群聊消息通过其他方式处理，这里主要是事件处理
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return {
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'code': 0,
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'msg': f'Event {event_type} received'
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}
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except Exception as e:
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print(f"[WeCom] Handle event error: {e}")
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return {
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'code': 1,
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'msg': str(e)
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}
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def _decrypt(self, encoded_text: str) -> str:
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"""
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解密企业微信加密消息
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AES 加密的消息格式: base64编码的16字节随机字符串 + 4字节消息长度 + 消息内容
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"""
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try:
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# Base64 解码
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cipher_text = base64.b64decode(encoded_text)
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# AES 密钥处理
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aes_key = base64.b64decode(self.encoding_aes_key + "=")
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# 解密
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from Crypto.Cipher import AES
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cipher = AES.new(aes_key, AES.MODE_CBC, aes_key[:16])
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decrypted = cipher.decrypt(cipher_text)
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# 去除补位字符
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pad = decrypted[-1]
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if isinstance(pad, str):
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pad = ord(pad)
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decrypted = decrypted[:-pad]
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# 提取消息内容（前16字节是随机字符串，接着4字节是消息长度）
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content = decrypted[16:]
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msg_len = struct.unpack(">I", content[:4])[0]
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message = content[4:4 + msg_len].decode('utf-8')
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return message
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except Exception as e:
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print(f"[WeCom] Decrypt error: {e}")
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raise ValueError("消息解密失败")
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async def send_message_to_group(
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self,
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chat_id: str,
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message: str
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) -> Dict[str, Any]:
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"""
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发送消息到企业微信群聊
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用于推送通知、简报等
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"""
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if not self.is_configured():
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raise ValueError("企业微信未配置")
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# 获取 access_token
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access_token = await self._get_access_token()
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# 发送消息 API
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url = "https://qyapi.weixin.qq.com/cgi-bin/message/send"
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params = {"access_token": access_token}
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message_data = {
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"touser": "",
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"msgtype": "text",
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"agentid": int(self.agent_id),
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"text": {
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"content": message
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},
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"safe": 0
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}
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# 如果是群聊，使用 chatid
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if chat_id:
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message_data["chatid"] = chat_id
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message_data["msgtype"] = "text"
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async with httpx.AsyncClient(timeout=20.0, trust_env=False) as client:
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resp = await client.post(url, params=params, json=message_data)
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resp.raise_for_status()
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return resp.json()
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async def _get_access_token(self) -> str:
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"""获取企业微信 access_token"""
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if not self.corp_id or not self.app_secret:
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raise ValueError("企业微信未配置")
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url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken"
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params = {
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"corpid": self.corp_id,
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"corpsecret": self.app_secret
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}
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async with httpx.AsyncClient(timeout=20.0, trust_env=False) as client:
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resp = await client.get(url, params=params)
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resp.raise_for_status()
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result = resp.json()
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if result.get('errcode') == 0:
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return result.get('access_token')
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raise Exception(f"获取 token 失败: {result}")
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# 全局服务实例
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def get_wecom_service(db: AsyncSession) -> WeChatWorkIntegrationService:
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"""获取企业微信服务实例"""
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return WeChatWorkIntegrationService(db)
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