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yl-wechat-pay

v1.0.5

Published

南宁引力互动科技 微信支付 for Nodejs

Downloads

8

Readme

南宁引力互动科技 微信支付 for Nodejs

初始化

var Payment = require('wechat-pay').Payment;
var initConfig = {
  partnerKey: "<partnerkey>",
  appId: "<appid>",
  mchId: "<mchid>",
  notifyUrl: "<notifyurl>",
  pfx: fs.readFileSync("<location-of-your-apiclient-cert.p12>")
};
var payment = new Payment(initConfig);

所有参数都不是必须的,不过这样配置最省事。实际调用时候的参数若有同名会覆盖。

付个钱

var order = {
  body: '吮指原味鸡 * 1',
  attach: '{"部位":"三角"}',
  out_trade_no: 'kfc' + (+new Date),
  total_fee: 10 * 100,
  spbill_create_ip: req.ip,
  openid: req.user.openid,
  trade_type: 'JSAPI'
};

payment.getBrandWCPayRequestParams(order, function(err, payargs){
  res.json(payargs);
});

注:

  1. 页面的路径需要位于支付授权目录
  2. 由于每次呼出支付界面,无论用户是否支付成功,out_trade_no 都会失效(OUT_TRADE_NO_USED),所以这里使用timestamp保证每次的id不同。业务逻辑中应该自行维护之

前端通过

WeixinJSBridge.invoke('getBrandWCPayRequest', payargs, function(res){
  if(res.err_msg == "get_brand_wcpay_request:ok"){
    alert("支付成功");
    // 这里可以跳转到订单完成页面向用户展示
  }else{
    alert("支付失败,请重试");
  }
});

来呼出微信的支付界面

接收微信付款确认请求

var middleware = require('wechat-pay').middleware;
app.use('<notifyUrl>', middleware(initConfig).getNotify().done(function(message, req, res, next) {
  var openid = message.openid;
  var order_id = message.out_trade_no;
  var attach = {};
  try{
   attach = JSON.parse(message.attach);
  }catch(e){}

  /**
   * 查询订单,在自己系统里把订单标为已处理
   * 如果订单之前已经处理过了直接返回成功
   */
  res.reply('success');

  /**
   * 有错误返回错误,不然微信会在一段时间里以一定频次请求你
   * res.reply(new Error('...'))
   */
}));

退个款

payment.refund({
  out_trade_no: "kfc001",
  out_refund_no: 'kfc001_refund',
  total_fee: 10 * 100,
  refund_fee: 10 * 100
}, function(err, result){
  /**
   * 微信收到正确的请求后会给用户退款提醒
   * 这里一般不用处理,有需要的话有err的时候记录一下以便排查
   */
});

查询历史订单

payment.downloadBill({
  bill_date: "20140913",
  bill_type: "ALL"
}, function(err, data){
  // 账单列表
  var list = data.list;
  // 账单统计信息
  var stat = data.stat;
});

错误处理

在回调的Error上的以name做了区分,有需要可以拿来做判断

  • ProtocolError 协议错误,看看有没有必须要传的参数没传
  • BusinessError 业务错误,可以从返回的data里面看看错误细节