NodeJS微信支付签名代码
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NodeJS微信支付签名代码
cooleone 发表于3个月前
NodeJS微信支付签名代码
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//统一下单签名参数顺序
let ss1Str = ['appid', 'body', 'mch_id', 'nonce_str', 'notify_url', 'out_trade_no', 'spbill_create_ip', 'total_fee', 'trade_type'];
//支付签名参数顺序(公众号)
let ss2Str = ['appId', 'nonceStr', 'package', 'signType', 'timeStamp'];
//支付签名参数顺序(APP)
let ss3Str = ['appid', 'noncestr', 'package', 'partnerid', 'prepayid', 'timestamp'];
/**
 * 微信签名
 */
router.get('/wxpay/sign2', function (req, res) {
    let statementId = req.queryData.statementId;
    let userId = req.queryData.userId;
    let ids = statementId.split(',');
    Statement.findAll({
        where: {
            id: {$in: ids}
        }
    }).then((list) => {
        let sum = 0;
        let ids = '';
        let contractId = '';
        let remark = '';
        list.forEach(function (st) {
            if (st.state == 0) {
                sum += st.sum;
                ids += st.id + ',';
                contractId = st.contractId;
                if (st.num > 0) {
                    remark += '第' + st.num + '期' + st.remark + ',';
                } else if (st.num == 0) {
                    remark += st.remark + ',';
                } else if (st.num == -1) {
                    remark += st.title + ' ' + st.remark + ',';
                }
            }
        });

        if (sum == 0 || ids.length == 0) {
            res.json({result: false, message: '未找到可以支付的记录'});
        } else {
            OrderPay.build({
                sum: sum,
                type: 1,
                contractId: contractId,
                statementIds: ids,
                payerId: userId,
                remark: remark
            }).save().then(function (orderPay) {
                let ipAddress = getClientIp(req);
                console.log('ipAddress===' + ipAddress);
                ipAddress = '218.205.52.3';
                let cost = parseInt(orderPay.sum*100);
                console.log('cost=' + cost);
                //调用微信接口下单
                let map = initMap();
                map['notify_url'] = config.jhkj.weixin.notify_url; //通知地址
                map['spbill_create_ip'] = ipAddress;
                map['body'] = config.jhkj.weixin.appname + '-' + orderPay.remark; //商品描述
                map['out_trade_no'] = orderPay.id; //商户订单号
                map['total_fee'] = cost; //总金额

                let signData = signup(map, ss1Str);

                unifiedorder(signData, function(body) {
                    xml2js.parseString(body, function(err, result) {
                        if (result.xml.return_code[0] == 'FAIL') {
                            res.json({result: false, message: result.xml.return_msg[0]});
                            return;
                        } else if (result.xml.result_code[0] == 'FAIL') {
                            if (result.xml.err_code[0] == 'OUT_TRADE_NO_USED') { //商户订单号重复
                            } else if (result.xml.err_code[0] == 'ORDERPAID') { //商户订单已支付
                            }
                            res.json({result: false, message: result.xml.err_code_des[0]});
                        } else {
                            //统一下单成功,返回签名信息
                            let prepayId = result.xml.prepay_id[0];
                            let map2 = {
                                "appid": config.jhkj.weixin.appid
                                ,"timestamp": new Date().getTime().toString().substring(0, 10)
                                ,"noncestr": uuid.v1().replace(/\-/g,"")
                                ,"package": "Sign=WXPay"
                                ,"prepayid": prepayId
                                ,"partnerid": config.jhkj.weixin.mch_id
                            };
                            map2.paySign = getSignStr(map2, ss3Str);
                            res.json({result: true, payJSON: map2, prepayId: prepayId, out_trade_no: orderPay.id });
                        }
                    });
                });
            });
        }
    });
});

/**
 * 微信统一下单
 * @param data
 * @param callback
 */
function unifiedorder(data, callback) {
    let opt = {
        method: 'POST'
        ,host: 'api.mch.weixin.qq.com'
        ,port: 443
        ,path: '/pay/unifiedorder'
        ,headers: {
            'Content-Type': 'text/xml;charset=utf-8'
            ,'Content-Length': iconv.encode(data, 'utf8').length
        }
    };

    let reqVideo = https.request(opt, function(serverFeedback) {
        serverFeedback.setEncoding('utf-8');
        console.log('getVideo:' + serverFeedback.statusCode);
        if (serverFeedback.statusCode == 200) {
            let body = "";
            serverFeedback
                .on('data', function (data) { body += data; })
                .on('end', function () {
                    console.log(body);
                    callback(body);
                });
        } else {
            console.log(serverFeedback.statusCode);
        }
    });
    reqVideo.write(iconv.encode(data, 'utf8'));
    reqVideo.end();
}

/**
 * 生成签名字符串
 * @param map
 * @param arrStr
 * @returns {string}
 */
function getSignStr(map, arrStr) {
    let stringA = '';
    let index = 0;
    arrStr.forEach(function(key) {
        stringA += (index++ != 0 ? '&' : '') + key + '=' + map[key];
    });
    stringA += '&key=' + config.jhkj.weixin.paykey;
    return utils.md5(stringA).toUpperCase();
}

/**
 * 获取签名数据
 * @param map
 * @param arrStr
 */
function signup(map, arrStr) {
    let sign = getSignStr(map, arrStr);
    let data = '<xml>';
    arrStr.forEach(function(key) {
        if (key == 'body') {
            data += '<' + key + '><![CDATA[' + map[key] + ']]></' + key + '>';
        } else {
            data += '<' + key + '>' + map[key] + '</' + key + '>';
        }
    });
    data += '<sign>' + sign + '</sign>';
    data += '</xml>';

    return data;
}

/**
 * 初始化基础参数map
 * @returns {{}}
 */
function initMap() {
    let map = {};
    map['appid'] = config.jhkj.weixin.appid;
    map['mch_id'] = config.jhkj.weixin.mch_id;
    map['trade_type'] = 'APP';
    map['nonce_str'] = uuid.v1().replace(/\-/g,"");
    return map;
}

/**
 * 获取用户端IP地址
 * @param req
 * @returns {*}
 */
function getClientIp(req) {
    let ipaddress = req.headers['x-forwarded-for'] ||
        req.connection.remoteAddress ||
        req.socket.remoteAddress ||
        req.connection.socket.remoteAddress;
    if (ipaddress.indexOf(',') >= 0) {
        ipaddress = ipaddress.split(',')[0];
    }
    return ipaddress;
}
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