node 小程序支付接口
//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\');
var key = \'********************\'; //商户后台支付的key
function createOrder(res,reqData,req) {
var total_fee,attach,openid,body,bookingNo;
var apiUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";
for( var k in reqData){ //这里是前端需要传过来的参数
var postData = JSON.parse(k);
total_fee = postData["total_fee"];
openid = postData["openid"];
body = postData[\'body\'];
attach = postData[\'attach\'];
bookingNo = postData[\'bookingNo\'];
break;
}
var wxConfig = {
appid:\'****\',
mch_id : \'*****\'
};
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);
//记录日志
var sql = "INSERT INTO qiming.order (order_num,openid,product_name,price,is_success) VALUES(?,?,?,?,?)";
client.query(sql,[bookingNo,openid,body,total_fee,1],function (err,result) {
if(err){
throw err
}
});
request({
url: apiUrl,
method: \'POST\',
body: formData
},function (err, response, body) {
if (!err && response.statusCode === 200){
console.log(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
//签名
var _paySignjs = paysignjs(wxConfig[\'appid\'], nonce_str, \'prepay_+ prepay_id,\'MD5\',timeStamp);
var args = {
appId: wxConfig[\'appid\'],
timeStamp: timeStamp,
nonceStr: nonce_str,
signType: "MD5",
package: prepay_id,
paySign: _paySignjs,
status:200
};
res.write(JSON.stringify(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)
}
})
}用到的一些工具函数
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=\'+key;
console.log(string);
var crypto = require(\'crypto\');
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
};
var string = raw(ret);
string = string + \'&key=\'+ key;
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) + \'\'
}