贝宝IPN的集成问题 [英] Paypal IPN integration issues

问题描述

我想处理来自贝宝我的网页上的响应。我发现来自PayPal的文档本身这个code。当响应是有效的，有些参数需要像 txn_id 和 payment_completed 进行处理。我应该怎么做？
在code是如下：

I am trying to process the response from paypal on my page. I found this code from paypal documentation itself. When the response is valid, some parameters needs to be processed like txn_id and payment_completed. How should i do that?? the code is as follows

string strSandbox = "https://www.sandbox.paypal.com/cgi-bin/webscr";
        // string strLive = "https://www.paypal.com/cgi-bin/webscr";
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(strSandbox);

        //Set values for the request back
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
        byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength);
        string strRequest = Encoding.ASCII.GetString(param);
        strRequest += "&cmd=_notify-validate";
        req.ContentLength = strRequest.Length;

        //for proxy
        //WebProxy proxy = new WebProxy(new Uri("http://url:port#"));
        //req.Proxy = proxy;

        //Send the request to PayPal and get the response
        StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
        streamOut.Write(strRequest);
        streamOut.Close();
        StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
        string strResponse = streamIn.ReadToEnd();
        streamIn.Close();

        if (strResponse == "VERIFIED")
        {

            //UPDATE YOUR DATABASE

            //TextWriter txWriter = new StreamWriter(Server.MapPath("../uploads/") + Session["orderID"].ToString() + ".txt");
            //txWriter.WriteLine(strResponse);
            //txWriter.Close();

            //check the payment_status is Completed
            //check that txn_id has not been previously processed
            //check that receiver_email is your Primary PayPal email
            //check that payment_amount/payment_currency are correct
            //process payment
        }
        else if (strResponse == "INVALID")
        {
            //UPDATE YOUR DATABASE

            //TextWriter txWriter = new StreamWriter(Server.MapPath("../uploads/") + Session["orderID"].ToString() + ".txt");
            //txWriter.WriteLine(strResponse);
            ////log for manual investigation
            //txWriter.Close();
        }
        else
        {  //UPDATE YOUR DATABASE

            //TextWriter txWriter = new StreamWriter(Server.MapPath("../uploads/") + Session["orderID"].ToString() + ".txt");
            //txWriter.WriteLine("Invalid");
            ////log response/ipn data for manual investigation
            //txWriter.Close();
        }
    }

给我一些投入吧。谢谢

Give me some inputs please. Thanks

推荐答案

在你的反应，你知道这是有效的，参数已经张贴到你，你可以让他们使用。表格例如：

After you get the response and you know that is valid, the parameters have been posted to you and you can get them using the .Form For example:

if (strResponse == "VERIFIED")
{
    // Now All informations are on
    HttpContext.Current.Request.Form;
    // for example you get the invoice like this
    HttpContext.Current.Request.Form["invoice"] 
    // or the payment_status like
    HttpContext.Current.Request.Form["payment_status"] 
}
else
{
  //log for manual investigation
}

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