egg-old-pay/lib/utl.js

sandan store pay inclued wechat alipay vista

/**
 * Created by ference on 2017/4/8.
 */

var crypto = require('crypto');
var request = require('request');

var utl = module.exports = {};

Date.prototype.format = function (fmt) {
    var o = {
        "M+": this.getMonth() + 1, //月份
        "d+": this.getDate(), //日
        "h+": this.getHours(), //小时
        "m+": this.getMinutes(), //分
        "s+": this.getSeconds(), //秒
        "q+": Math.floor((this.getMonth() + 3) / 3), //季度
        "S": this.getMilliseconds() //毫秒
    };
    if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
    for (var k in o)
        if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
    return fmt;
}

/**
 * 浅拷贝
 * @param obj
 * @returns {{}}
 */
utl.copy = function (obj) {
    var ret = {};
    for(var k in obj) {
        ret[k] = obj[k];
    }
    return ret;
}

/**
 * 对请求参数进行组装、编码、签名，返回已组装好签名的参数字符串
 * @param {{Object} params  请求参数
 * @param {String} privateKey 商户应用私钥
 * @param {String} [signType] 签名类型 'RSA2' or 'RSA'
 * @returns {String}
 */
utl.processParams = function (params, privateKey, signType) {
    var ret = utl.encodeParams(params);
    var sign = utl.sign(ret.unencode, privateKey, signType);
    return ret.encode + '&sign=' + encodeURIComponent(sign);
};

/**
 * 对请求参数进行组装、编码
 * @param {Object} params  请求参数
 * @returns {Object}
 */
utl.encodeParams = function (params) {
    var keys = [];
    for(var k in params) {
        var v = params[k];
        if (params[k] !== undefined && params[k] !== "") keys.push(k);
    }
    keys.sort();

    var unencodeStr = "";
    var encodeStr = "";
    var len = keys.length;
    for(var i = 0; i < len; ++i) {
        var k = keys[i];
        if(i !== 0) {
            unencodeStr += '&';
            encodeStr += '&';
        }
        unencodeStr += k + '=' + params[k];
        encodeStr += k + '=' + encodeURIComponent(params[k]);
    }
    return {unencode:unencodeStr, encode:encodeStr};
};

/**
 * 对字符串进行签名验证
 * @param {String} str 要验证的参数字符串
 * @param {String} sign 要验证的签名
 * @param {String} publicKey 支付宝公钥
 * @param {String} [signType] 签名类型
 * @returns {Boolean}
 */
utl.signVerify = function (str, sign, publicKey, signType) {
    var verify;
    if(signType === 'RSA2') {
        verify = crypto.createVerify('RSA-SHA256');
    } else {
        verify = crypto.createVerify('RSA-SHA1');
    }
    verify.update(str, 'utf8');
    var result = verify.verify(publicKey, sign, 'base64');
    return result;
};

/**
 * 对字符串进行签名
 * @param {String} str 要签名的字符串
 * @param {String} privateKey 商户应用私钥
 * @param {String} [signType] 签名类型
 * @returns {String}
 */
utl.sign = function (str, privateKey, signType) {
    var sha;
    if(signType === 'RSA2') {
        sha = crypto.createSign('RSA-SHA256');
    } else {
        sha = crypto.createSign('RSA-SHA1');
    }
    sha.update(str, 'utf8');
    return sha.sign(privateKey, 'base64');
}


/**
 * 发送请求 https://github.com/request/request
 * @param {Object} opts 请求参数
 * @param {String} opts.url 请求地址
 * @param {String} opts.method  GET|POST|PUT...
 * @param {String} [opts.type] text/xml | application/json | application/x-www-form-urlencoded ...
 * @param {Object} [opts.headers] {}
 * @param {Object} [opts.qs] query参数
 * @param {Buffer|String|ReadStream} [opts.body] 请求体
 * @param {Object} [opts.form] form表单
 * @returns {Promise.<Object>} resolve({response, body})
 */
utl.request = function(opts){
    return new Promise(function(resolve, reject){
        request(opts, function(err, res, body){
            if(err){
                reject(err);
                return;
            }
            var ret = {response:res, body:body};
            ret.ok = function() {
                return res.statusCode === 200;
            };
            ret.json = function () {
                if(res.body) return JSON.parse(res.body);
                return null;
            };
            resolve(ret);
        });
    });
};