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基于nodejs实现微信支付功能

程序员文章站 2022-07-28 19:38:54
本文实例为大家分享了nodejs实现微信支付的具体代码,供大家参考,具体内容如下 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...

本文实例为大家分享了nodejs实现微信支付的具体代码,供大家参考,具体内容如下

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

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demo 
router.get('/order', function(req, res, next){ 
  var attach = "1276687601"; 
  var body = "测试支付"; 
  var mch_id = "1111111"; //商户id 
  var 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){ 
 
}); 

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。