wifi_hotpot/wifi_manager.py

# 逻辑：
# 1. 检测 Wi-Fi 连接状态，若已连接，则退出程序
# 2. 扫描 Wi-Fi 网络并获取Wi-Fi列表
# 3. 关闭Wi-Fi，并启动热点和web服务器
# 4. 等待用户选择 Wi-Fi 网络并输入密码
# 5. 关闭热点并重新扫描 Wi-Fi，连接到用户选择的 Wi-Fi 网络

import subprocess
import re
import os
import time
from flask import Flask, render_template, request, redirect, url_for, make_response

app = Flask(__name__)

# 检测 Wi-Fi 连接状态
def check_wifi_connection():
    try:
        # 使用nmcli命令检查Wi-Fi连接状态
        output = subprocess.check_output(['nmcli', 'device', 'status']).decode('utf-8')
        
        # 分析输出以查找Wi-Fi连接状态
        for line in output.split('\n'):
            if 'wifi' in line and 'connected' in line:
                return True
    except subprocess.CalledProcessError as e:
        print(f"Error checking Wi-Fi status: {e}")
    
    return False

def restart_hotspot():
    try:
        # sudo systemctl stop dnsmasq
        # sudo systemctl restart NetworkManager
        # sudo nmcli radio wifi off
        # sudo nmcli radio wifi on
        # nohup sudo create_ap wlan0 eth0 Takway-Toys --no-virt > create_ap.log 2>&1 &
        subprocess.run(['sudo', 'systemctl', 'stop', 'dnsmasq'], check=True)
        subprocess.run(['sudo', 'systemctl', 'restart', 'NetworkManager'], check=True)
        subprocess.run(['sudo', 'nmcli', 'radio', 'wifi', 'off'], check=True)
        subprocess.run(['sudo', 'nmcli', 'radio', 'wifi', 'on'], check=True)
        subprocess.Popen('sudo nohup create_ap wlan0 eth0 Takway-Toys --no-virt > create_ap.log 2>&1 &', shell=True)
    except subprocess.CalledProcessError as e:
        print(f"Error setting up hotspot: {e}")


def scan_wifi():
    try:
        subprocess.run(['nmcli', 'dev', 'wifi', 'rescan'], check=True)
        time.sleep(1)
        output = subprocess.check_output(['nmcli', 'dev', 'wifi'])
        wifi_list = []
        lines = output.decode().splitlines()
        for idx, line in enumerate(lines[1:]):
            print(f"{idx}: {line}")
            
            # 分割字符串以空格为分隔符
            columns = line.split()

            # 提取第一列和第三列的值
            mac_address = columns[0]
            
            ssid = " ".join(columns[1:3])
            if "Infra" in ssid:
                ssid = ssid.replace(" Infra", "")
            if ":" in ssid:
                # "72:A6:CC:8C:89:6C Takway-AI" 
                # 去除字符串中的MAC地址
                ssid = re.sub(r'\b\w{2}(:\w{2}){5}\b', '', ssid)

            # 提取第六列的强度值
            last_info = columns[4:8]
            # 去除所有的空格
            columns = line.replace(" ", "")
            # 提取"Mbit/s"后的三位以内数字
            strength = int(columns[columns.index("Mbit/s")+6:columns.index("Mbit/s")+8])
            
            
            # print("MAC地址:", mac_address)
            # print("SSID:", ssid)
            # print("强度:", strength)
            
            wifi_list.append({'ssid': ssid, 'signal': strength})
            if len(wifi_list) == 15:
                break
            
        return wifi_list
    except subprocess.CalledProcessError as e:
        print(f"Error scanning for Wi-Fi networks: {e}")
        return []


# 连接 Wi-Fi
def connect_wifi(ssid, password):
    # 关闭热点
    try:
        subprocess.run(['sudo', 'create_ap', '--stop', 'wlan0'], check=True)
        print("Stopping create_ap service")
    except subprocess.CalledProcessError as e:
        print(f"Error stopping hotspot: {e}")
    
    time.sleep(1)
    
    # 扫描 Wi-Fi 网络
    # scan_wifi()
    
    time.sleep(1)
    
    # 连接到用户选择的 Wi-Fi 网络
    try:
        subprocess.run(['nmcli', 'dev', 'wifi', 'connect', ssid, 'password', password], check=True)
        print(f"Successfully connected to Wi-Fi: {ssid}")
        return True
    except subprocess.CalledProcessError as e:
        print(f"Error connecting to Wi-Fi: {e}")
        return False
    
# 主页
@app.route('/')
def index():
    global wifi_list
    print(wifi_list)
    
    response = make_response(render_template('index.html', wifi_list=wifi_list))
    response.headers.set('Content-Type', 'text/html')
    response.headers.set('Apple-Web-App-Capable', 'yes')
    response.headers.set('Apple-Mobile-Web-App-Status-Bar-Style', 'black-translucent')
    return response
    
# 提交 Wi-Fi 信息
@app.route('/submit', methods=['POST'])
def submit():
    ssid = request.form['ssid']
    password = request.form['password']
    print(f"Connecting to Wi-Fi: {ssid} with password {password}")
    connected = connect_wifi(ssid, password)
    
    time.sleep(5)
    # 检查是否成功连接Wi-Fi
    if check_wifi_connection() and connected:
        os._exit(0)  # 成功连接后退出程序
    else:
        print("Wi-Fi连接失败。")
        
    return redirect(url_for('index'))


if __name__ == '__main__':
    debug_mode = False  # 设置为 True 以跳过 Wi-Fi 连接状态检测

    if not debug_mode:
        if check_wifi_connection():
            print("已连接到 Wi-Fi 网络")
        else:
            print("未连接到 Wi-Fi 网络")

    print("Starting Flask server")
    print("----------------------------")
    wifi_list = scan_wifi()
    print("----------------------------")
    # save wifi_list to file
    with open('wifi_list.txt', 'w') as f:
        for wifi in wifi_list:
            f.write(f"{wifi['ssid']},{wifi['signal']}\n")
    
    restart_hotspot()
    # 启动 Flask 服务器
    app.run(host='0.0.0.0', port=80)