Http post error：远程主机强行关闭现有连接

I realise there have been a number of similar posts to this but I haven't found a solution yet. Am trying to post some xml to an MPI gateway but keep getting the following error:

我知道有很多类似的帖子，但我还没有找到解决方案。我试图将一些xml发布到MPI网关，但不断收到以下错误：

Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

无法从传输连接读取数据：远程主机强制关闭现有连接。

Below is the code I'm currently using but have tried just about every different approach I can think of and they all return the same error:

下面是我目前正在使用的代码，但我已经尝试过几乎所有我能想到的不同方法，它们都返回相同的错误：

        string result = "";

        string xml = "<TNSAuthRequest><CardNumber>0123456789</CardNumber><ExpiryDate>1801</ExpiryDate><PurchaseAmt>750</PurchaseAmt><CurrencyCode>826</CurrencyCode><CurrencyExponent>2</CurrencyExponent><CountryCode>826</CountryCode><MerchantName>Mayflower</MerchantName><MerchantId>0123456789</MerchantId><MerchantData>abcdefghijklmnopqrstuvwxyz0123456789</MerchantData><MerchantUrl>example.com</MerchantUrl><NotificationURL>example.com/basket</NotificationURL></TNSAuthRequest>";

        var url = "https://mpi.securecxl.com";
        byte[] bytes = System.Text.Encoding.ASCII.GetBytes("xmldata=" + xml.ToString());

        ServicePointManager.ServerCertificateValidationCallback += new System.Net.Security.RemoteCertificateValidationCallback(ValidateRemoteCertificate);

        var req = (HttpWebRequest)WebRequest.Create(url);
        req.AllowWriteStreamBuffering = true;
        req.ContentType = "text/xml";
        req.Method = "POST";
        //req.ContentLength = bytes.Length;
        req.KeepAlive = false;
        req.ProtocolVersion = HttpVersion.Version10;
        req.ServicePoint.ConnectionLimit = 1;
        //req.Timeout = -1;

        try
        {
            using (var writer = new StreamWriter(req.GetRequestStream(), Encoding.ASCII))
            {
                writer.WriteLine(bytes);
            }
            using (WebResponse resp = req.GetResponse())
            {
                using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
                {
                    result = sr.ReadToEnd().Trim();
                }
            }
        }
        catch (Exception ex)
        {
            result = ex.Message + "<br />" + ex.InnerException.Message + "<br /><br />" + xml.Replace("<", "&lt;");
        }

        ViewBag.result = result;

Am basically wandering if anyone can see anything that might be wrong with the code that could be causing this error or if it's most likely I problem on the their end? Have tried running on my localhost, our live server and my own private server (with a completely different IP) and still get same result.

如果任何人都可以看到可能导致此错误的代码可能出错的任何内容，或者如果它最有可能在我们的结尾出现问题，那么我基本上会徘徊吗？尝试在我的localhost，我们的实时服务器和我自己的私有服务器（具有完全不同的IP）上运行，并且仍然得到相同的结果。

Any ideas?

有任何想法吗？

1 个解决方案

#1

I think its because you are connecting to "https" url. In this case you have to add following line to your code.

我认为是因为你连接到“https”网址。在这种情况下，您必须在代码中添加以下行。

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

It will accept "ssl" protocol for your request. "ServicePointManager.ServerCertificateValidationCallback" handler just controls certificate validity.

它将接受您的请求的“ssl”协议。 “ServicePointManager.ServerCertificateValidationCallback”处理程序只控制证书有效性。

#1