公眾號支付
統一接口中的openid必須的，trade_type設置為JSAPI
exports.jsapipay = function (req, res) {
var bookingNo = req.query.bookingNo;
var appid = _appid;
var attach = _attach;
var mch_id = _mch_id;
var nonce_str = _nonce_str;
var total_fee = _total_fee;
var notify_url = _notify_url;
var openid = _openid;
var body = _body;
var timeStamp = _timeStamp;
var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
var formData = "<xml>";
formData += "<appid>"+appid+"</appid>"; //appid
formData += "<attach>"+attach+"</attach>"; //附加數據
formData += "<body>"+body+"</body>";
formData += "<mch_id>"+mch_id+"</mch_id>"; //商戶號
formData += "<nonce_str>"+nonce_str+"</nonce_str>"; //隨機字符串，不長于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></spbill_create_ip>";
formData += "<total_fee>"+total_fee+"</total_fee>";
formData += "<trade_type>JSAPI</trade_type>";
formData += "<sign>"+paysignjsapi(appid,attach,body,mch_id,nonce_str,notify_url,openid,bookingNo,'',total_fee,'JSAPI')+"</sign>";
formData += "</xml>";
request({url:url,method:'POST',body: formData},function(err,response,body){
if(!err && response.statusCode == 200){
console.log(body);
var prepay_id = getXMLNodeValue('prepay_id',body.toString("utf-8"));
var tmp = prepay_id.split('[');
var tmp1 = tmp[2].split(']');
//簽名
var _paySignjs = paysignjs(appid,nonce_str,'prepay_id='+tmp1[0],'MD5',timeStamp);
res.render('jsapipay',{prepay_id:tmp1[0],_paySignjs:_paySignjs});
//res.render('jsapipay',{rows:body});
//res.redirect(tmp3[0]);
}
});
}
簽名加密算法
function paysignjsapi(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 = raw(ret);
var key = _key;
string = string + '&key='+key;
var crypto = require('crypto');
return crypto.createHash('md5').update(string,'utf8').digest('hex');
};
簽名算法要注意大小寫，里面有很多坑在
function paysignjs(appid,nonceStr,package,signType,timeStamp) {
var ret = {
appId: appid,
nonceStr: nonceStr,
package:package,
signType:signType,
timeStamp:timeStamp
};
var string = raw1(ret);
var key = _key;
string = string + '&key='+key;
console.log(string);
var crypto = require('crypto');
return crypto.createHash('md5').update(string,'utf8').digest('hex');
};
簽名時候的參數不需要轉換為小寫的
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;
};
解析XML
function getXMLNodeValue(node_name,xml){
var tmp = xml.split("<"+node_name+">");
var _tmp = tmp[1].split("</"+node_name+">");
return _tmp[0];
}
客戶端直接通過WeixinJSBridge來實現彈出支付的窗口
function jsApiCall()
{
WeixinJSBridge.invoke(
'getBrandWCPayRequest',
{
"appId" : "wxebs20ae8d978330b", //公眾號名稱，由商戶傳入
"timeStamp" : "1414211784", //時間戳，自1970年以來的秒數
"nonceStr" : "ibuaiVcKdpRxkhJA", //隨機串
"package" : "prepay_id=<%=prepay_id%>",
"signType" : "MD5", //微信簽名方式：
"paySign" : "<%=_paySignjs%>" //微信簽名
},
function (res)
{
WeixinJSBridge.log(res.err_msg);
//alert(res.err_code+res.err_desc+res.err_msg);
//判斷支付返回的參數是否支付成功并跳轉
}
);
}
function callpay()
{
if (typeof WeixinJSBridge == "undefined")
{
if (document.addEventListener)
{
document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
}
else if (document.attachEvent)
{
document.attachEvent('WeixinJSBridgeReady', jsApiCall);
document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
}
}
else
{
jsApiCall();
}
}
