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1.windows上安装NodeJS

2.新建项目目录，如nodejs_wechat_bot，进入目录后安装express和weixin-api模块，具体方法是:

npm install express  
npm install weixin-api  

3.新建文件index.js,写入如下内容

var weixin      = require('weixin-api');  
var express     = require('express');  
var app         = express(); 

// 接入验证
app.get('/', function(req, res) {

    // 签名成功
    if (weixin.checkSignature(req)) {
        res.status(200).send(req.query.echostr);
    } else {
        res.status(200).send('fail');
    }
});

// config 根据自己的实际配置填写
weixin.token = 'qbtest';

// 监听文本消息
weixin.textMsg(function(msg) {  
    console.log("textMsg received");
    console.log(JSON.stringify(msg));

    var resMsg = {};

    switch (msg.content) {
        case "文本" :
            // 返回文本消息
            resMsg = {
                fromUserName : msg.toUserName,
                toUserName : msg.fromUserName,
                msgType : "text",
                content : "这是文本回复",
                funcFlag : 0
            };
            break;

        case "音乐" :
            // 返回音乐消息
            resMsg = {
                fromUserName : msg.toUserName,
                toUserName : msg.fromUserName,
                msgType : "music",
                title : "音乐标题",
                description : "音乐描述",
                musicUrl : "音乐url",
                HQMusicUrl : "高质量音乐url",
                funcFlag : 0
            };
            break;

        case "图文" :

            var articles = [];
            articles[0] = {
                title : "PHP依赖管理工具Composer入门",
                description : "PHP依赖管理工具Composer入门",
                picUrl : "http://weizhifeng.net/images/tech/composer.png",
                url : "http://weizhifeng.net/manage-php-dependency-with-composer.html"
            };

            articles[1] = {
                title : "八月西湖",
                description : "八月西湖",
                picUrl : "http://weizhifeng.net/images/poem/bayuexihu.jpg",
                url : "http://weizhifeng.net/bayuexihu.html"
            };

            articles[2] = {
                title : "「翻译」Redis协议",
                description : "「翻译」Redis协议",
                picUrl : "http://weizhifeng.net/images/tech/redis.png",
                url : "http://weizhifeng.net/redis-protocol.html"
            };

            // 返回图文消息
            resMsg = {
                fromUserName : msg.toUserName,
                toUserName : msg.fromUserName,
                msgType : "news",
                articles : articles,
                funcFlag : 0
            }
    }

    weixin.sendMsg(resMsg);
});

// 监听图片消息
weixin.imageMsg(function(msg) {  
    console.log("imageMsg received");
    console.log(JSON.stringify(msg));
});

// 监听位置消息
weixin.locationMsg(function(msg) {  
    console.log("locationMsg received");
    console.log(JSON.stringify(msg));
});

// 监听链接消息
weixin.urlMsg(function(msg) {  
    console.log("urlMsg received");
    console.log(JSON.stringify(msg));
});

// 监听事件消息
weixin.eventMsg(function(msg) {  
    console.log("eventMsg received");
    console.log(JSON.stringify(msg));
});

// Start
app.post('/', function(req, res) {

    // loop
    weixin.loop(req, res);

});

app.listen(3000);  

4.执行node index.js启动node server。注意到weixin.token 被赋值了qbtest，后面会用到。

本篇文章借鉴https://www.cnblogs.com/josjo/p/6099646.html

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