nodejs 支付（未完）

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var _contentStr = fnCreateUrlParam(data);
_contentStr += "&key=" + "dkehruteirjfdiheriyterjkjdfdferk";
    console.log('xml:')
    //console.log(_contentStr)
var md5 = crypto.createHash('md5');
var sign = md5.update(_contentStr, 'utf-8').digest('hex').toString().toUpperCase();
    data.sign=sign;
    console.log("生成的订单data：")
    console.log(data)
    delete data.key;
    var _xmlData = fnCreateXml(data);

    var _sendData = "<xml version='1.0' encoding='UTF-8'>" + _xmlData + "</xml>"; //_xmlTemplate.replace(/{content}/)

    //console.log(_sendData);
        var url = "https://api.mch.weixin.qq.com/pay/unifiedorder";

    var opt = {
        host: "api.mch.weixin.qq.com",
        port: '443',
        method: 'POST',
        path: "/pay/unifiedorder"
    };
    var body = '';
    opt.agent = new https.Agent(opt);
    var req = https.request(opt, function(res) {
        res.setEncoding('utf8');
        //console.log("Got response: " + res.statusCode);
        res.on('data',function(d){
            body += d;
        }).on('end', function(){
            //console.log(res.headers);

            console.log('微信返回消息');
            //console.log(body);
            var ret = fnParseReceivedXML(body);
            //如果回调存在就执行回调函数
            //if(typeof callback == 'function'){
                //console.log(body);
                _callback(body,next);
            //}
        });
    }).on('error', function(e) {
        console.log("Got error: " + e.message);
    });