微信支付 for node.js
npm install co-wechat-payment
创建统一支付订单
var WXPay = require('co-wechat-payment');
var wxpay = new WXPay({
appId: 'xxxxxxxx',
mchId: '1234567890',
partnerKey: 'xxxxxxxxxxxxxxxxx', //微信商户平台API密钥
pfx: fs.readFileSync('./wxpay_cert.p12'), //微信商户平台证书
});
var result = yield wxpay.unifiedOrder({
body: 'js H5支付',
out_trade_no: '20160701'+Math.random().toString().substr(2, 10),
total_fee: 1, // 1分钱
spbill_create_ip: '10.10.10.10',
notify_url: 'http://xx.xx.xx/wxpay/notify/',
trade_type: 'JSAPI',
product_id: '1234567890'
});
查询订单 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_2
// 通过微信订单号查
var result = yield wxpay.queryOrder({ transaction_id:"xxxxxx" });
// 通过商户订单号查
var result = yield wxpay.queryOrder({ out_trade_no:"xxxxxx" });
关闭订单 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_3
var result = yield wxpay.closeOrder({ out_trade_no:"xxxxxx"});
退款接口
var params = {
appid: 'xxxxxxxx',
mch_id: '1234567890',
op_user_id: '商户号即可',
out_refund_no: '20140703'+Math.random().toString().substr(2, 10),
total_fee: '1', //原支付金额
refund_fee: '1', //退款金额
transaction_id: '微信订单号'
};
var result = yield wxpay.refund(params);
生成JS API支付参数,发给页面
var result = yield wxpay.getBrandWCPayRequestParams({
openid: '微信用户 openid',
body: '公众号支付测试',
detail: '公众号支付测试',
out_trade_no: '20150331'+Math.random().toString().substr(2, 10),
total_fee: 1,
spbill_create_ip: '192.168.2.210',
notify_url: 'http://wxpay_notify_url'
});
yield this.render('/wechat/pay',{payArgs:result});
网页调用参数(以ejs为例)
WeixinJSBridge.invoke(
"getBrandWCPayRequest", <%-JSON.stringify(payArgs)%>, function(res){
if(res.err_msg == "get_brand_wcpay_request:ok" ) {
// success
}
});
根据之前预创建订单接口返回的prepare_id参数,生成JS API支付参数,发给页面
var result = yield wxpay.getJsPayRequestParams('xxxxx');
yield this.render('/wechat/pay',{payArgs:result});
商户服务端处理微信的回调(koa为例)
var wechatBodyParser = require('co-wechat-body');
app.use(wechatBodyParser(options));
// 支付结果异步通知
router.post('/wechat/payment/notify', wechatPayment.middleware(), function* (){
var message = this.request.body;
// 处理你的订单状态更新逻辑. [warn] 注意,分布式并发情况下需要加锁处理.
// do something...
// 向微信返回处理成功信息
this.body = 'OK';
// 如果业务逻辑处理异常, 向微信返回错误信息,微信服务器会继续通知.
// this.body = new Error('server error');
});