C# · 12月 23, 2021

c# – Http post error:远程主机强行关闭现有连接

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.

下面是我目前使用的代码,但我已经尝试了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;

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他们的结尾出现问题,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.

有任何想法吗?

解决方法 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;

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.