Recientemente, estaba pensando en la función de usar el nodo para conectarme a la función de pago del applet, y finalmente pagué con éxito después de algunos golpes y golpes. El siguiente es mi código
//需要引入的包
var xml2js = require(‘xml2js‘);
var qs = require(‘querystring‘);
var https = require(‘https‘);
var http = require(‘http‘);
var request = require(‘request‘);
var crypto = require(‘crypto‘);
var mysql = require(‘mysql‘);código principal
exports.pay = (req, res) => {
let time = new Date().getTime();
var total_fee,attach,openid,body,bookingNo;
let postData = req.body;
var apiUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";
total_fee = 100;
openid = postData.openid;
body = '商品详情-支付';
bookingNo=time;
var wxConfig = {
appid:'小程序APPID',
mch_id : '微信支付商户号'
};
var timeStamp = createTimeStamp(); //时间节点
var nonce_str = createNonceStr() + createTimeStamp(); //随机字符串
var create_ip = get_client_ip(req); //请求ip
var notify_url ='https://tqmsq.7dar.com/notifypay';
var formData = "<xml>";
formData += "<appid>"+wxConfig['appid']+"</appid>"; //appid
formData += "<mch_id>"+wxConfig['mch_id']+"</mch_id>"; //商户号
formData += "<nonce_str>"+nonce_str+"</nonce_str>"; //随机字符串
formData += "<body>" + body + "</body>"; //商品描述
formData += "<notify_url>"+notify_url+"</notify_url>";
formData += "<openid>" + openid + "</openid>";
formData += "<out_trade_no>" + bookingNo + "</out_trade_no>";
formData += "<spbill_create_ip>"+create_ip+"</spbill_create_ip>";
formData += "<total_fee>" + total_fee + "</total_fee>";
formData += "<trade_type>JSAPI</trade_type>";
formData += "<sign>" + paysignjsapi(wxConfig['appid'],body,wxConfig['mch_id'],nonce_str,notify_url,openid,bookingNo,create_ip,total_fee,'JSAPI') + "</sign>";
formData += "</xml>";
console.log(formData);
request({
url: apiUrl,
method: 'POST',
body: formData
},function (err, response, body) {
if (!err && response.statusCode === 200){
console.log('成功',body);
var result_code = getXMLNodeValue('result_code', body.toString("utf-8"));
var resultCode = result_code.split('[')[2].split(']')[0];
if(resultCode === 'SUCCESS'){ //成功
var prepay_id = getXMLNodeValue('prepay_id', body.toString("utf-8")).split('[')[2].split(']')[0]; //获取到prepay_id
console.log('prepay_id',prepay_id)
//签名
var _paySignjs = paysignjs(wxConfig['appid'], nonce_str, 'prepay_id='+ prepay_id,'MD5',timeStamp);
var args = {
appId: wxConfig['appid'],
timeStamp: timeStamp,
nonceStr: nonce_str,
signType: "MD5",
package: prepay_id,
paySign: _paySignjs,
status:200
};
return res.send({
status: 0,
message: '获取成功',
data: args
})
res.end();
}else{ //失败
var err_code_des = getXMLNodeValue('err_code_des',body.toString("utf-8"));
var errDes = err_code_des.split('[')[2].split(']')[0];
var errArg = {
status:400,
errMsg: errDes
};
res.write(JSON.stringify(errArg));
res.end();
}
console.log('prepay_id是'+resultCode)
}
})
}Lo que debe tenerse en cuenta anteriormente es que se debe obtener el openid del usuario antes de poder realizar el pago.
Algunas funciones de utilidad utilizadas
function paysignjs(appid, nonceStr, package, signType, timeStamp) {
var ret = {
appId: appid,
nonceStr: nonceStr,
package: package,
signType: signType,
timeStamp: timeStamp,
};
var string = raw1(ret);
string = string + '&key=支付商户号密钥';
console.log(string);
return crypto.createHash('md5').update(string, 'utf8').digest('hex');
}
function raw1(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;
}
//生成签名
function paysignjsapi(appid,body,mch_id,nonce_str,notify_url,openid,out_trade_no,spbill_create_ip,total_fee,trade_type) {
var ret = {
appid: appid,
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
};
console.log('ret',ret)
var string = raw(ret);
string = string + '&key=支付商户号密钥';
var sign = crypto.createHash('md5').update(string, 'utf8').digest('hex');
return sign.toUpperCase()
}
function raw(args) {
var keys = Object.keys(args);
keys = keys.sort();
var newArgs = {};
keys.forEach(function(key) {
newArgs[key.toLowerCase()] = args[key];
});
var string = '';
for(var k in newArgs) {
string += '&' + k + '=' + newArgs[k];
}
string = string.substr(1);
return string;
}
//解析xml
function getXMLNodeValue(node_name, xml) {
var tmp = xml.split("<" + node_name + ">");
var _tmp = tmp[1].split("</" + node_name + ">");
return _tmp[0];
}
//获取url请求客户端ip
var get_client_ip = function(req) {
var ip = req.headers['x-forwarded-for'] ||
req.ip ||
req.connection.remoteAddress ||
req.socket.remoteAddress ||
req.connection.socket.remoteAddress || '';
if(ip.split(',').length>0){
ip = ip.split(',')[0]
}
return ip;
};
// 随机字符串产生函数
function createNonceStr() {
return Math.random().toString(36).substr(2, 15)
}
// 时间戳产生函数
function createTimeStamp() {
return parseInt(new Date().getTime() / 1000) + ''
}El front-end invoca la API de pago de WeChat después de recibir los parámetros devueltos
services.order.pay(data).then(res => {
wx.requestPayment({
timeStamp: res.data.timeStamp,
nonceStr: res.data.nonceStr,
package: 'prepay_id='+res.data.package,
signType: 'MD5',
paySign: res.data.paySign,
success(res) {
console.log(res)
},
fail(err) {
console.log(err);
}
})
})Tenga en cuenta que "prepay_id=" debe agregarse al parámetro del paquete aquí; de lo contrario, se informará el siguiente error
Busqué este problema durante dos días antes de encontrar el motivo. Resultó que no leí el desarrollo del documento y finalmente pagué con éxito ~