node-微信h5支付功能

#支付条件

1.微信公众号-申请支付 （https://mp.weixin.qq.com）

2.微信商户平台-申请支付（https://pay.weixin.qq.com）

#支付参数

var appid     = 'wxxxxxxxxxxxxxxxxxx'; //微信公众号appid

var mchid     = '159xxxxxxx'  //微信商户平台账号mchid

var mchkey    = 'haixxxxxxxxxxxxxxxxxx'; //微信商户平台秘钥

var wxurl     = 'http://xxxxxx.com';//支付回调地址

 

#封装微信转换参数方法

var xmlreader = require("xmlreader");

 
var wxpay = {
 
    //把金额转为分
    getmoney: function (money) {
        return parseFloat(money) * 100;
    },
 
    // 随机字符串产生函数  
    createNonceStr: function () {
        return Math.random().toString(36).substr(2, 15);
    },
 
    // 时间戳产生函数  
    createTimeStamp: function () {
        return parseInt(new Date().getTime() / 1000) + '';
    },
 
    //签名加密算法
    paysignjsapi: function (appid, body, mch_id, nonce_str, notify_url, out_trade_no, spbill_create_ip, total_fee, trade_type, mchkey) {
        var ret = {
            appid: appid,
            mch_id: mch_id,
            nonce_str: nonce_str,
            body: body,
            notify_url: notify_url,
            out_trade_no: out_trade_no,
            spbill_create_ip: spbill_create_ip,
            total_fee: total_fee,
            trade_type: trade_type
        };
        //console.log('ret==', ret);
        var string = raw(ret);
        var key = mchkey;
        string = string + '&key=' + key;
        //console.log('string=', string);
        var crypto = require('crypto');
        return crypto.createHash('md5').update(string, 'utf8').digest('hex').toUpperCase();
    },
    //签名加密算法,第二次的签名
    paysignjsapifinal: function (appid,mch_id,prepayid,noncestr,timestamp,mchkey) {
        var ret = {
            appid: appid,
            partnerid: mch_id,
            prepayid: prepayid,
            package: 'Sign=WXPay',
            noncestr: noncestr,
            timestamp: timestamp,
        };
        //console.log('retretret==', ret);
        var string = raw(ret);
        var key = mchkey;
        string = string + '&key=' + key;
        //console.log('stringstringstring=', string);
        var crypto = require('crypto');
        return crypto.createHash('md5').update(string, 'utf8').digest('hex').toUpperCase();
    },
    //签名加密算法ss
    paysignss: function (appid,mch_id,out_trade_no,nonce_str,mchkey) {
        var ret = {
            appid: appid,
            mch_id: mch_id,
            out_trade_no: out_trade_no,
            nonce_str : nonce_str
        };
        //console.log('retretret==', ret);
        var string = raw(ret);
        var key = mchkey;
        string = string + '&key=' + key;
        //console.log('stringstringstring=', string);
        var crypto = require('crypto');
        return crypto.createHash('md5').update(string, 'utf8').digest('hex').toUpperCase();
    },
    getXMLNodeValue: function (xml) {
        // var tmp = xml.split("<"+node_name+">");
        // console.log('tmp',tmp);
        // var _tmp = tmp[1].split("</"+node_name+">");
        // console.log('_tmp',_tmp);
        // return _tmp[0];
        xmlreader.read(xml, function (errors, response) {
            if (null !== errors) {
                //console.log(errors)
                return;
            }
            //console.log('长度===', response.xml.prepay_id.text().length);
            var prepay_id = response.xml.prepay_id.text();
            //console.log('解析后的prepay_id==',prepay_id);
            return prepay_id;
        });
    }
 
}
function raw(args) {
    var keys = Object.keys(args);
    keys = keys.sort()
    var newArgs = {};
    keys.forEach(function (key) {
        newArgs[key] = args[key];
    });
    var string = '';
    for (var k in newArgs) {
        string += '&' + k + '=' + newArgs[k];
    }
    string = string.substr(1);
    return string;
}
 
module.exports = wxpay;

 

#api接口方法，传入后台订单号和订单金额

static async wxpay(sorder,smoney) {
        //首先拿到前端传过来的参数
        let orderCode = sorder;
        let money     = smoney;

        //首先生成签名sign
        let mch_id = mchid;
        let nonce_str = wxpay.createNonceStr();
        let timestamp = wxpay.createTimeStamp();
        let body = '微信支付';
        let out_trade_no = orderCode;
        let total_fee = wxpay.getmoney(money);
        let spbill_create_ip = '49.235.115.11';//终端ip
        let notify_url = wxurl;
        let trade_type = 'NATIVE';
        let sign = wxpay.paysignjsapi(appid,body,mch_id,nonce_str,notify_url,out_trade_no,spbill_create_ip,total_fee,trade_type,mchkey);
        //组装xml数据
        var formData  = "<xml>";
        formData  += "<appid>"+appid+"</appid>";  //appid
        formData  += "<body><![CDATA["+"微信支付"+"]]></body>";
        formData  += "<mch_id>"+mch_id+"</mch_id>";  //商户号
        formData  += "<nonce_str>"+nonce_str+"</nonce_str>"; //随机字符串，不长于32位。
        formData  += "<notify_url>"+notify_url+"</notify_url>";
        formData  += "<out_trade_no>"+out_trade_no+"</out_trade_no>";
        formData  += "<spbill_create_ip>"+spbill_create_ip+"</spbill_create_ip>";
        formData  += "<total_fee>"+total_fee+"</total_fee>";
        formData  += "<trade_type>"+trade_type+"</trade_type>";
        formData  += "<sign>"+sign+"</sign>";
        formData  += "</xml>";
        var url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';

        let promise = new Promise(function(resolve, reject) {
            request({url:url,method:'POST',body: formData},function(err,response,body){
                if(!err && response.statusCode == 200){
                    //console.log(body);
                    xmlreader.read(body.toString("utf-8"), function (errors, response) {
                        var code_url = response.xml.code_url.text();
                        resolve(code_url)
                    });
                }
            })
        });
        return promise
}

 

#node插件

xmlreader（转义微信生成支付订单回调数据）