app.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from flask import Flask, request, make_response
import hashlib
import time
import xml.etree.ElementTree as ET
import os
import json
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from openai import OpenAI
from dotenv import load_dotenv

# 加载环境变量
load_dotenv()

app = Flask(__name__)

# 配置
TOKEN = os.getenv('TOKEN')
API_KEY = os.getenv("API_KEY")
BASE_URL = os.getenv("OPENAI_BASE_URL")
EMAIL_KEY = os.getenv("EMAIL_KEY")
client = OpenAI(api_key=API_KEY, base_url=BASE_URL)

# 存储用户会话信息
user_sessions = {}

# 定义发送邮件的函数
FUNCTIONS = [
    {
        "name": "send_email",
        "description": "发送电子邮件。",
        "parameters": {
            "type": "object",
            "properties": {
                "to": {
                    "type": "string",
                    "description": "收件人邮箱地址"
                },
                "subject": {
                    "type": "string",
                    "description": "邮件主题"
                },
                "content": {
                    "type": "string",
                    "description": "邮件内容"
                }
            },
            "required": ["to", "subject", "content"]
        }
    }
]

def verify_wechat(request):
    # 获取微信服务器发送过来的参数
    data = request.args
    signature = data.get('signature')
    timestamp = data.get('timestamp')
    nonce = data.get('nonce')
    echostr = data.get('echostr')
    
    # 对参数进行字典排序，拼接字符串
    temp = [timestamp, nonce, TOKEN]
    temp.sort()
    temp = ''.join(temp)
    
    # 加密
    if (hashlib.sha1(temp.encode('utf8')).hexdigest() == signature):
        return echostr
    else:
        return 'error', 403

def getUserMessageContentFromXML(xml_content):
    # 解析XML字符串
    root = ET.fromstring(xml_content)
    # 提取数据
    content = root.find('Content').text
    from_user_name = root.find('FromUserName').text
    to_user_name = root.find('ToUserName').text
    return content, from_user_name, to_user_name

def generate_response_xml(from_user_name, to_user_name, output_content):
    output_xml = '''
    <xml>
        <ToUserName><![CDATA[%s]]></ToUserName>
        <FromUserName><![CDATA[%s]]></FromUserName>
        <CreateTime>%s</CreateTime>
        <MsgType><![CDATA[text]]></MsgType>
        <Content><![CDATA[%s]]></Content>
    </xml>'''
    
    response = make_response(output_xml % (from_user_name, to_user_name, str(int(time.time())), output_content))
    response.content_type = 'application/xml'
    return response

def get_openai_response(messages, functions=None, function_call=None):
    try:
        response = client.chat.completions.create(
            model="gpt-4o-mini",
            messages=messages,
            functions=functions,
            function_call=function_call
        )
        return response.choices[0].message
    except Exception as e:
        print(f"调用OpenAI API时出错: {str(e)}")
        return None

def send_email(to, subject, content):
    try:
        with smtplib.SMTP('106.15.184.28', 8025) as smtp:
            smtp.login("jwt", EMAIL_KEY)
            message = MIMEMultipart()
            message['From'] = "Me <[email protected]>"
            message['To'] = to
            message['Subject'] = subject
            message.attach(MIMEText(content, 'html'))
            smtp.sendmail("[email protected]", to, message.as_string())
        return True
    except Exception as e:
        print(f"发送邮件时出错: {str(e)}")
        return False

def process_function_call(response_message):
    function_name = response_message.function_call.name
    function_args = json.loads(response_message.function_call.arguments)
    if function_name == "send_email":
        to = function_args.get('to', '')
        subject = function_args.get('subject', '')
        content = function_args.get('content', '')
        if not to or not subject or not content:
            return None
        success = send_email(to, subject, content)
        return {
            "success": success,
            "to": to,
            "subject": subject,
            "content": content
        }
    else:
        return None

def split_message(message, max_length=500):
    return [message[i:i+max_length] for i in range(0, len(message), max_length)]

@app.route('/api/wx', methods=['GET', 'POST'])
def wechatai():
    if request.method == 'GET':
        return verify_wechat(request)
    else:
        # 处理POST请求
        print("user request data: ", request.data)
        user_message_content, from_user_name, to_user_name = getUserMessageContentFromXML(request.data)
        print("user message content: ", user_message_content)

        if user_message_content.lower() == '继续':
            if from_user_name in user_sessions and user_sessions[from_user_name]['pending_response']:
                response_content = user_sessions[from_user_name]['pending_response'].pop(0)
                if user_sessions[from_user_name]['pending_response']:
                    response_content += '\n\n回复"继续"获取下一部分。'
                else:
                    response_content += '\n\n回复结束。'
            else:
                response_content = "没有待发送的消息。"
        else:
            if from_user_name not in user_sessions:
                user_sessions[from_user_name] = {'messages': [], 'pending_response': [], 'email_sent': False}

            session = user_sessions[from_user_name]
            session['messages'].append({"role": "user", "content": user_message_content})
            
            # 检查是否需要调用函数
            decision_response = get_openai_response(session['messages'], functions=FUNCTIONS, function_call="auto")
            
            if decision_response.function_call and not session['email_sent']:
                # 处理函数调用
                function_result = process_function_call(decision_response)
                if function_result:
                    session['email_sent'] = True
                    if function_result['success']:
                        response_content = f"邮件已成功发送到 {function_result['to']}。\n\n主题：{function_result['subject']}\n\n内容：\n{function_result['content']}"
                    else:
                        response_content = "邮件发送失败，请稍后再试。"
                else:
                    response_content = "无法处理该请求，请重试。"
            else:
                # 正常的对话响应
                gpt_response = get_openai_response(session['messages'])
                response_content = gpt_response.content if gpt_response else "抱歉，我遇到了一些问题，无法回答您的问题。"

            session['messages'].append({"role": "assistant", "content": response_content})

            # 重置email_sent标志，为下一次消息做准备
            session['email_sent'] = False

            response_parts = split_message(response_content)
            
            if len(response_parts) > 1:
                response_content = response_parts[0] + '\n\n回复"继续"获取下一部分。'
                session['pending_response'] = response_parts[1:]
            else:
                response_content = response_parts[0]

        return generate_response_xml(from_user_name, to_user_name, response_content)

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860, debug=True)