最近利用ALists创建了个网盘资源站，想着如何增加个动态验证码进行验证后才能进行访问下载，动态获取验证码，使用了禁止打开控制台校验等方式减少绕过几率，现在分享给大家。

NodeJS后端代码

利用json存储验证码数据，并且用户无法重复获取验证码

require('dotenv').config();
const express = require('express');
const wechat = require('wechat');
const fs = require('fs');
const axios = require('axios');
const cors = require('cors');

const app = express();
const dbPath = './codes.json';

// CORS 中间件
app.use(cors({
    origin: function (origin, callback) {
        if (!origin || origin.endsWith('*')) {
            callback(null, true);
        } else {
            callback(new Error('Not allowed by CORS'));
        }
    }
}));

app.use(express.json());

// 读取 JSON 数据
function readData() {
    if (!fs.existsSync(dbPath)) {
        fs.writeFileSync(dbPath, JSON.stringify({}));
    }
    return JSON.parse(fs.readFileSync(dbPath));
}

// 保存 JSON 数据
function saveData(data) {
    fs.writeFileSync(dbPath, JSON.stringify(data));
}

// 处理微信请求
app.use('/', wechat({
    token: process.env.WECHAT_TOKEN,
    appid: process.env.WECHAT_APPID,
    encodingAESKey: process.env.ENCODING_AES_KEY,
    checkSignature: false
}, async (req, res, next) => {
    const { FromUserName, Content } = req.weixin;

    // 处理“验证码”请求
    if (Content.trim() === '验证码') {
        const userKey = FromUserName;
        const data = readData();

        // 检查是否已经生成过验证码
        const userData = data[userKey];
        const today = new Date().toISOString().split('T')[0];

        if (userData && userData.date === today) {
            return res.reply(`今天已经获取过验证码了, 您的验证码是: ${userData.code}`);
        }

        // 生成新的验证码
        const newCode = Math.floor(100000 + Math.random() * 900000).toString(); // 生成6位随机数字
        const timestamp = Date.now();

        // 插入或更新验证码
        data[userKey] = {
            code: newCode,
            date: today,
            timestamp: timestamp
        };
        saveData(data);

        return res.reply(`您的验证码是: ${newCode}（12小时内有效）`);
    }
    res.reply('未知指令，请回复“验证码”获取验证码');
}));

// 验证验证码的接口
app.post('/verify', (req, res) => {
    const { code } = req.body;
    const data = readData();

    const isValid = Object.values(data).some(userData => userData.code === code);

    if (isValid) {
        return res.json({ success: true, message: '验证码有效' });
    } else {
        return res.json({ success: false, message: '验证码无效或已过期' });
    }
});

// 启动服务器
const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
    console.log(`Server listening at http://localhost:${PORT}`);
});

前端代码

<script disable-devtool-auto src='https://cdn.jsdelivr.net/npm/disable-devtool'></script>
<script src="https://unpkg.com/sweetalert/dist/sweetalert.min.js"></script>

<script>
document.addEventListener('keydown', function(event) {
    if (event.key === 'F12' || (event.ctrlKey && event.shiftKey && ['I', 'J', 'C'].includes(event.key.toUpperCase()))) {
        event.preventDefault();
    }
});

document.addEventListener("DOMContentLoaded", function() {
    promptPassword("success", "请输入验证码以继续访问");
});

// 验证验证码函数
function validateCaptcha(captcha) {
    const xhr = new XMLHttpRequest();
    xhr.open("POST", "验证接口, true);
    xhr.setRequestHeader("Content-Type", "application/json");

    xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
            try {
                const response = JSON.parse(xhr.responseText);
                if (xhr.status === 200 && response.code === 200) {
                    welcomeUser();
                } else {
                    swal("错误", response.msg || "验证码错误，请重试", "error").then(() => {
                        promptPassword("error", "请重新输入验证码");
                    });
                }
            } catch (e) {
                console.error("JSON 解析错误:", e);
                swal("错误", "响应格式不正确，请稍后重试", "error").then(() => {
                    promptPassword("error", "请重新输入验证码");
                });
            }
        }
    };

    xhr.send(JSON.stringify({ code: captcha }));
}

// 提示输入验证码的函数
function promptPassword(icon, title) {
    swal({
        title: title,
        text: "请确认您已获取正确的验证码。请点击下方按钮关注我们的微信公众号以获取验证码。",
        closeOnClickOutside: false,
        icon: icon,
        buttons: {
            confirm: {
                text: "确认提交",
                value: "confirm",
                className: "custom-swal-button swal-button--confirm"
            },
            getCode: {
                text: "微信公众号",
                value: "get_code",
                className: "custom-swal-button swal-button--copy"
            }
        },
        content: {
            element: "input",
            attributes: {
                placeholder: "请输入验证码",
                type: "text",
                style: "width: 100%; padding: 10px; border: 1px solid #ccc; border-radius: 4px;"
            }
        }
    })
    .then((value) => {
        if (value === '') {
            promptPassword("warning", "请输入正确的验证码");
        } else if (value === "get_code") {
            showWeChatCode();
        } else if (!/^\d{6}$/.test(value)) {
            promptPassword("warning", "验证码格式不正确，请输入6位数字");
        } else {
            validateCaptcha(value);
        }
    });
}

// 显示微信公众号二维码
function showWeChatCode() {
    swal({
        title: "关注微信公众号获取验证码",
        text: "请扫描以下二维码关注我们的微信公众号以获取验证码。",
        icon: "info",
        closeOnClickOutside: false,
        content: {
            element: "img",
            attributes: {
                src: "公众号图片",
                style: "width: 100%; height: auto; border-radius: 4px;"
            }
        },
        buttons: {
            confirm: {
                text: "返回输入",
                value: "confirm",
                className: "custom-swal-button swal-button--confirm"
            }
        }
    }).then(() => {
        promptPassword("info", "请输入验证码以继续访问");
    });
}

// 欢迎用户函数
function welcomeUser() {
    swal("欢迎！", {
        icon: "success",
        buttons: false,
        timer: 1000, //1秒后自动消失
    });
}


// 防止查看页面源代码
window.onbeforeunload = function() {
    return "您确定要离开此页面吗？";
};

// 检测并阻止右键菜单
window.addEventListener('contextmenu', function(event) {
    event.preventDefault();
}, false);

// 检测并阻止选中文本
window.addEventListener('selectstart', function(event) {
    event.preventDefault();
}, false);
</script>

效果图