公众号配置

在开启服务器配置的时候需要验证自己的url.

router.get('/api/send', (req, res) => {
    let token = wxToken;
    let signature = req.query.signature;
    let timestamp = req.query.timestamp;
    let nonce = req.query.nonce;
    let echostr = req.query.echostr;
    let arr = [token, timestamp, nonce];
    arr = arr.sort();
    let str = arr.join('');
    str = sh1(str);
    if (str == signature) {
        res.send(echostr)

    } else {
        res.json({})
    }
})

接收短信

router.post('/api/send', (req, res) => {
    var _da;
    req.on("data", function (data) {
        _da = data.toString("utf-8");
    });
    req.on("end", async function () {
        var ToUserName = getXMLNodeValue('ToUserName', _da);
        var FromUserName = getXMLNodeValue('FromUserName', _da);
        var CreateTime = getXMLNodeValue('CreateTime', _da);
        var MsgType = getXMLNodeValue('MsgType', _da);
        var Content = getXMLNodeValue('Content', _da);
        var MsgId = getXMLNodeValue('MsgId', _da);
        // console.log(ToUserName);
        // console.log(FromUserName);
        // console.log(CreateTime);
        // console.log(MsgType);
        // console.log(Content);
        // console.log(MsgId);
        // Content = '<![CDATA[667898]]>'
        var xml = joinXml(_da,'这个是回复的内容')
        res.send(xml);
    });
})

function getXMLNodeValue(node_name, xml) {
    var tmp = xml.split("<" + node_name + ">");
    var _tmp = tmp[1].split("</" + node_name + ">");
    return _tmp[0];
}

function getXMLVal(xml){
    return xml.split(']')[0].split('[').reverse()[0]
}

function joinXml(_da, val = '') {
    var ToUserName = getXMLNodeValue('ToUserName', _da);
    var FromUserName = getXMLNodeValue('FromUserName', _da);
    var CreateTime = getXMLNodeValue('CreateTime', _da);
    var MsgType = getXMLNodeValue('MsgType', _da);
    var Content = getXMLNodeValue('Content', _da);
    // var MsgId = getXMLNodeValue('MsgId', _da);
    let resTxt = ''
    if (val == '') {
        resTxt = Content;
    } else {
        resTxt = '<![CDATA[' + val + ']]>'
    }
    return '<xml><ToUserName>' + FromUserName + '</ToUserName><FromUserName>' + ToUserName + '</FromUserName><CreateTime>' + CreateTime + '</CreateTime><MsgType>' + MsgType + '</MsgType><Content>' + resTxt + '</Content></xml>';
}