基于nodejs微信支付

来源：互联网发布：拳击实战知乎编辑：程序博客网时间：2024/06/05 16:57

通过nodejs使用微信支付最重要的就是微信的签名，在这里md5后的字符必须转化为大写

一、回复微信通知消息模版

message.ejs

<xml>    <return_code><![CDATA[<%-return_code%>]]></return_code>    <return_msg><![CDATA[<%=return_msg%>]]></return_msg></xml>

二、微信支付model文件代码如下：

wxpay.js

var config = require('../config'); ／／配置文件 appid 等信息var Q = require("q");var request = require("request");var crypto = require('crypto');var ejs = require('ejs');var fs = require('fs');var key = "此处为申请微信支付的API密码";var messageTpl = fs.readFileSync(__dirname + '/message.ejs', 'utf-8');var WxPay = {    getXMLNodeValue: function(node_name, xml) {        var tmp = xml.split("<" + node_name + ">");        var _tmp = tmp[1].split("</" + node_name + ">");        return _tmp[0];    },    raw: function(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;    },    paysignjs: function(appid, nonceStr, package, signType, timeStamp) {        var ret = {            appId: appid,            nonceStr: nonceStr,            package: package,            signType: signType,            timeStamp: timeStamp        };        var string = this.raw(ret);        string = string + '&key=' + key;        var sign = crypto.createHash('md5').update(string, 'utf8').digest('hex');        return sign.toUpperCase();    },    paysignjsapi: function(appid, attach, body, mch_id, nonce_str, notify_url, openid, out_trade_no, spbill_create_ip, total_fee, trade_type) {        var ret = {            appid: appid,            attach: attach,            body: body,            mch_id: mch_id,            nonce_str: nonce_str,            notify_url: notify_url,            openid: openid,            out_trade_no: out_trade_no,            spbill_create_ip: spbill_create_ip,            total_fee: total_fee,            trade_type: trade_type        };        var string = this.raw(ret);        string = string + '&key=' + key; //key为在微信商户平台(pay.weixin.qq.com)-->账户设置-->API安全-->密钥设置        var crypto = require('crypto');        var sign = crypto.createHash('md5').update(string, 'utf8').digest('hex');        return sign.toUpperCase();    },    // 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) + '';    },

    // 此处的attach不能为空值 否则微信提示签名错误    order: function(attach, body, mch_id, openid, bookingNo, total_fee, notify_url) {        var deferred = Q.defer();        var appid = config.member_config.appid;        var nonce_str = this.createNonceStr();        var timeStamp = this.createTimeStamp();        var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";        var formData = "<xml>";        formData += "<appid>" + appid + "</appid>"; //appid        formData += "<attach>" + attach + "</attach>"; //附加数据        formData += "<body>" + body + "</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 += "<openid>" + openid + "</openid>";        formData += "<out_trade_no>" + bookingNo + "</out_trade_no>";        formData += "<spbill_create_ip>61.50.221.43</spbill_create_ip>";        formData += "<total_fee>" + total_fee + "</total_fee>";        formData += "<trade_type>JSAPI</trade_type>";        formData += "<sign>" + this.paysignjsapi(appid, attach, body, mch_id, nonce_str, notify_url, openid, bookingNo, '61.50.221.43', total_fee, 'JSAPI') + "</sign>";        formData += "</xml>";        var self = this;        request({            url: url,            method: 'POST',            body: formData        }, function(err, response, body) {            if (!err && response.statusCode == 200) {                console.log(body);                var prepay_id = self.getXMLNodeValue('prepay_id', body.toString("utf-8"));                var tmp = prepay_id.split('[');                var tmp1 = tmp[2].split(']');                //签名                var _paySignjs = self.paysignjs(appid, nonce_str, 'prepay_id=' + tmp1[0], 'MD5', timeStamp);                var args = {                    appId: appid,                    timeStamp: timeStamp,                    nonceStr: nonce_str,                    signType: "MD5",                    package: tmp1[0],                    paySign: _paySignjs                };                deferred.resolve(args);            } else {                console.log(body);            }        });        return deferred.promise;    },    //支付回调通知    notify: function(obj) {        var output = "";        if (obj.return_code == "SUCCESS") {            var reply = {                return_code: "SUCCESS",                return_msg: "OK"            };        } else {            var reply = {                return_code: "FAIL",                return_msg: "FAIL"            };        }        output = ejs.render(messageTpl, reply);        return output;    },};module.exports = WxPay;

三、在express router中调用wxpay

//微信支付demorouter.get('/order', function(req, res, next){var attach = "1276687601";var body = "测试支付";var mch_id = "1111111"; ／／商户IDvar openid = "111111";var bookingNo = "201501806125346"; ／／订单号var total_fee = 10;var notify_url = "http://localhost/wxpay/notify"; //通知地址wxpay.order(attach, body, mch_id, openid, bookingNo, total_fee, notify_url).then(function(data){res.render('wxpay', {args: data});});});

／／微信回调通知 采用数据流形式读取微信返回的xml数据 此处不在累赘router.post('/notify', function(req, res, next){});

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