是否有 PayPal IPN 的样本 [英] Is there any sample for PayPal IPN

问题描述

我有一个 Asp.Net WEB API 2 项目，我想实现一个即时付款通知 (IPN) 侦听器控制器.

I have an Asp.Net WEB API 2 project and I would like to implement an Instant Payment Notification (IPN) listener controller.

我找不到任何示例和 nuget 包.我所需要的只是确认用户使用 Paypal 上的标准 html 按钮付款.这很简单.

I can't find any example and nuget package. All I need is to acknowledge that the user paid with the standard html button on Paypal. It's quite simple.

所有 nuget 包都是创建发票或自定义按钮.这不是我需要的

All the nuget packages are to create invoice or custom button. It's not what I need

paypal 上的示例适用于经典的 asp.net，不适用于 MVC 或 WEB API MVC

The samples on paypal are for classic asp.net and not for MVC or WEB API MVC

我确信有人已经这样做了，当我开始编码时，我有一种自己在重新发明轮子的感觉.

I'm sure somebody did that already and when I started coding I had a feeling that I was reinventing the wheel.

是否有任何 IPN 侦听器控制器示例?

Is there any IPN listener controller example?

至少有一个 PaypalIPNBindingModel 来绑定 Paypal 查询.

At least a PaypalIPNBindingModel to bind the Paypal query.

    [Route("IPN")]
    [HttpPost]
    public IHttpActionResult IPN(PaypalIPNBindingModel model)
    {
        if (!ModelState.IsValid)
        {
            return BadRequest();
        }

        return Ok();
    }

编辑

到目前为止我有以下代码

So far I have the following code

        [Route("IPN")]
        [HttpPost]
        public void IPN(PaypalIPNBindingModel model)
        {
            if (!ModelState.IsValid)
            {
                // if you want to use the PayPal sandbox change this from false to true
                string response = GetPayPalResponse(model, true);

                if (response == "VERIFIED")
                {

                }
            }
        }

        string GetPayPalResponse(PaypalIPNBindingModel model, bool useSandbox)
        {
            string responseState = "INVALID";

            // Parse the variables
            // Choose whether to use sandbox or live environment
            string paypalUrl = useSandbox ? "https://www.sandbox.paypal.com/"
            : "https://www.paypal.com/";

            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(paypalUrl);
                client.DefaultRequestHeaders.Accept.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));

                //STEP 2 in the paypal protocol
                //Send HTTP CODE 200
                HttpResponseMessage response = client.PostAsJsonAsync("cgi-bin/webscr", "").Result;

                if (response.IsSuccessStatusCode)
                {
                    //STEP 3
                    //Send the paypal request back with _notify-validate
                    model.cmd = "_notify-validate";
                    response = client.PostAsync("cgi-bin/webscr", THE RAW PAYPAL REQUEST in THE SAME ORDER ).Result;

                    if(response.IsSuccessStatusCode)
                    {
                        responseState = response.Content.ReadAsStringAsync().Result;
                    }
                }
            }

            return responseState;
        }

但是对于第 3 步，我尝试将我的模型发布为 json，但 paypal 返回一个 HTML 页面，而不是 VALIDATED 或 INVALID.我发现我必须使用 application/x-www-form-urlencoded 并且它的参数顺序相同.

but for the step 3 I tried to post my model as json but paypal returns a HTML page instead of VALIDATED or INVALID. I figured out that I have to use application/x-www-form-urlencoded and it the parameters as to be in the same order.

如何获取请求 URL?

How can I get the request URL?

我会使用查询 Url 并将 &cmd=_notify-validate 添加到它

I would use the query Url and add &cmd=_notify-validate to it

推荐答案

This is my code

This is my code

如果有什么问题，请随时查看

Feel free to review is something is wrong

        [Route("IPN")]
        [HttpPost]
        public IHttpActionResult IPN()
        {
            // if you want to use the PayPal sandbox change this from false to true
            string response = GetPayPalResponse(true);

            if (response == "VERIFIED")
            {
                //Database stuff
            }
            else
            {
                return BadRequest();
            }

            return Ok();
        }

        string GetPayPalResponse(bool useSandbox)
        {
            string responseState = "INVALID";
            // Parse the variables
            // Choose whether to use sandbox or live environment
            string paypalUrl = useSandbox ? "https://www.sandbox.paypal.com/"
            : "https://www.paypal.com/";

            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(paypalUrl);
                client.DefaultRequestHeaders.Accept.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));

                //STEP 2 in the paypal protocol
                //Send HTTP CODE 200
                HttpResponseMessage response = client.PostAsJsonAsync("cgi-bin/webscr", "").Result;

                if (response.IsSuccessStatusCode)
                {
                    //STEP 3
                    //Send the paypal request back with _notify-validate
                    string rawRequest = response.Content.ReadAsStringAsync().Result;
                    rawRequest += "&cmd=_notify-validate";

                    HttpContent content = new StringContent(rawRequest);

                    response = client.PostAsync("cgi-bin/webscr", content).Result;

                    if(response.IsSuccessStatusCode)
                    {
                        responseState = response.Content.ReadAsStringAsync().Result;
                    }
                }
            }

            return responseState;
        }

这篇关于是否有 PayPal IPN 的样本的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！