.net core 3.1 webapi调用支付宝支付接口以及回调函数

1使用场景在APP(是APP,不是其他,网页或者其他调用方式不同)中内集成支付宝支付

2去支付平台申请一个APPID(唯一标识) ,商家账号(PID,没有就自己申请一个)

3下载一个支付宝开放平台开发助手(其他的也行,只有能生成公钥私钥),生成公钥和私钥(私钥不能泄露),然后上传公钥生成支付宝公钥

应用公钥:商户自己生成的RSA公钥(与应用私钥必须匹配,生成的时候注意是java版本还是其他版本),需要将这个公钥上传到开发平台,验证是否是商户发起的,支付宝会生成对应的公钥。

应用私钥:商户自己生成RSA私钥(与应用公钥必须匹配,不能泄露),使用私钥对请求字符串加密

支付宝公钥:商户使用该公钥验证该结果是否是支付宝返回的

4服务端.net core webapi) sdk,用nuget包管理(也可以去支付宝官网下载https://docs.open.alipay.com/54/106370/

5设置相关类

    /// <summary>
    /// 调用阿里支付接口参数设置
    /// </summary>
    public class AlipayConfig
    {
        /// <summary>
        /// 发起请求的应用ID。沙箱与线上不同,请更换代码中配置;
        /// </summary>
        public string AppId { get; set; }

        /// <summary>
        /// 用于支付宝账户登录授权业务的入参 pid
        /// </summary>
        public string PId { get; set; }

        /// <summary>
        /// 支付宝私匙
        /// </summary>
        public string PrivateKey { get; set; }

        /// <summary>
        /// 应用公钥
        /// </summary>
        public string Publickey { get; set; }

        /// <summary>
        /// 支付宝公匙
        /// </summary>
        public string AlipayPublicKey { get; set; }

        /// <summary>
        ///  服务器异步通知路径
        /// </summary>
        public string notify_url { get; set; }

        /// <summary>
        ///  公匙类型/签名类型
        /// </summary>
        public string SignType { get; set; }

        /// <summary>
        ///  编码格式
        /// </summary>
        public string CharSet { get; set; }

        /// <summary>
        /// 向支付宝发起请求的网关。沙箱与线上不同,请更换代码中配置;沙箱:https://openapi.alipaydev.com/gateway.do上线https://openapi.alipay.com/gateway.do
        /// </summary>
        public string GatewayUrl { get; set; }

        /// <summary>
        /// 调用的接口版本
        /// </summary>
        public string Version { get; set; }

        /// <summary>
        /// 仅支持JSON
        /// </summary>
        public string Format { get; set; }

        public bool KeyFromFile { get; set; }
    }

这些都是必填的,在appsetting中读取

"Alipay": {
    "AppId": "申请的appid","PId": "商户id","PrivateKey": "私钥","Publickey": "公钥",
    "AlipayPublicKey": "阿里公钥",
    "notify_url": "回调函数地址",
    "SignType": "RSA2",
    "CharSet": "UTF-8",
    "GatewayUrl": "https://openapi.alipay.com/gateway.do",
    "Version": "2.0",
    "Format": "json",
    "KeyFromFile": false
  }        /// <summary>

6 在startup注入

var alipay = Configuration.GetSection("Alipay");
services.Configure<AlipayConfig>(alipay);

7 在业务逻辑层

 public class OrderService : IOrderService, IBaseService
    {
        private readonly IAopClient _client;
        private readonly AlipayConfig _alipayConfig;public OrderService(IOptionsMonitor<AlipayConfig> alipayConfig)
        {
            _alipayConfig = alipayConfig.CurrentValue;
            _client = new DefaultAopClient(_alipayConfig.GatewayUrl, _alipayConfig.AppId, _alipayConfig.PrivateKey, _alipayConfig.Format, _alipayConfig.Version, _alipayConfig.SignType, _alipayConfig.AlipayPublicKey, _alipayConfig.CharSet, _alipayConfig.KeyFromFile);
        }

        /// <summary>
        /// 支付宝统一下单
        /// </summary>
        /// <param name="price"></param>
        /// <param name="orderNumber"></param>
        /// <returns></returns>
        public async Task<string> AliOrderAsync(int price, string orderNumber)
        {
            //SDK已经封装掉了公共参数,这里只需要传入业务参数。以下方法为sdk的model入参方式(model和biz_content同时存在的情况下取biz_content)。
            // 组装业务参数model
            AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
            //订单总金额,单位为元,精确到小数点后两位,取值范围[0.01,100000000],必选
            model.TotalAmount = (price).ToString();
            //商品的标题 / 交易标题 / 订单标题 / 订单关键字等。必选
            model.Subject = "购买商品的标题";
            ///外部第三方的订单号,必选
            model.OutTradeNo = orderNumber;
            AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
            // 设置同步回调地址
            request.SetReturnUrl("");
            // 设置异步通知接收地址()
            request.SetNotifyUrl(_alipayConfig.notify_url);
            // 将业务model载入到request
            request.SetBizModel(model);
            var response = _client.SdkExecute(request);
            // Console.WriteLine($"订单支付发起成功,订单号:{response.Body}");
            //直接传客户端,不需要做form表单转换为json格式
            return response.Body;
        }

8 然后在控制器中调用就可以了

9 客户端唤起支付宝界面进行支付,支付成功之后,会调用服务器的回调函数,主要作用是来验证订单信息,更新数据库

需要注意的是回调函数不能带有参数,只能post请求

        /// <summary>
        /// Alipay回调通知
        /// </summary>
        /// <returns></returns>
        [HttpPost]
        public async Task<string> Alipaynotify()
        {
            string result = "success";
            SortedDictionary<string, string> sarray = new SortedDictionary<string, string>();
            var keys = Request.Form.Keys;
            if (keys != null)
            {
                foreach (string key in keys)
                {
                    sarray.Add(key, Request.Form[key]);
                }
            }
            if (sarray.Count > 0)
            {
                var notifyId = Request.Form["notify_id"].ToString();
                var sign = Request.Form["sign"].ToString();
                bool verifyresult = _paynotifyservice.GetVerifyResult(sarray, notifyId, sign);
                if (verifyresult) //验签成功 && 关键业务参数校验成功
                {
                    string out_trade_no = Request.Form["out_trade_no"];   //获取ali传过来的参数的值
                    string trade_no = Request.Form["trade_no"];
                    string trade_status = Request.Form["trade_status"];
                    string total_amount = Request.Form["total_amount"];
                    string buyer_id = Request.Form["buyer_id"];
                    string buyer_logon_id = Request.Form["buyer_logon_id"];
                    string app_id = Request.Form["app_id"];
                    var status = await _paynotifyservice.AlipayNotifyAsync(out_trade_no, trade_no, trade_status, float.Parse(total_amount), buyer_logon_id);  //进行数据的更新
                    if (status != 1)
                    {
                        result = "fail";
                    }
                }
                else//验证失败
                {
                    result = "fail";
                }
            }
            return result;
        }
         /// <summary>
        /// 调用阿里支付接口回调函数更新数据库
        /// </summary>
        /// <param name="OrderNumber"></param>
        /// <param name="aliOrderNo"></param>
        /// <param name="payStauts"></param>
        /// <param name="totalAmout"></param>
        /// <param name="buyerId"></param>
        /// <returns></returns>                       
        public async Task<int> AlipayNotifyAsync(string OrderNumber, string aliOrderNo, string payStauts, double totalAmout, string buyerId)
        {
            var result = -1;
            if (payStauts.Equals("TRADE_SUCCESS") || payStauts.Equals("TRADE_FINISHED"))
            {
                //此处应该校验交易金额是否正确。需要比对float或者double类型数据
                //逻辑处理,更新数据库中订单状态
                result = 1;
            }
            return result;
        }

        public bool GetVerifyResult(SortedDictionary<string, string> sarray, string notifyId, string sign)
        {
            var alinotify = new Notify(_alipayConfig.CharSet, _alipayConfig.SignType, _alipayConfig.PId, _alipayConfig.GatewayUrl, _alipayConfig.AlipayPublicKey);
            //对异步通知进行验签
            bool verifyresult = alinotify.Verify(sarray, notifyId, sign);
            return verifyresult;
        }

至此,订单的整个流程就完成了

 

posted @ 2020-08-10 11:44  青兰柳  阅读(2754)  评论(5编辑  收藏  举报