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[英]Server Error: The request was aborted: Could not create SSL/TLS secure channel
[英]the request was aborted could not create ssl/tls secure channel on shared hosting server C#
我们无法使用webrequest
或htmlagilitypack
连接到https服务器它显示以下错误
The underlying connection was closed: An unexpected error occurred on a receive.System.Net.WebException:
或could not create SSL/TLS secure channel on server
我们的代码在localhost上工作正常,我们还在我的代码文件中添加了以下部分,但我们无法确定它仅在服务器上发生的原因。
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
如果有人对此有任何想法,请与我们分享。
有时这是因为webrequest不接受自签名证书。 我有这个我经常使用的单身课程。 它接受所有自签名证书。 如果您共享了您尝试访问的URL,则更容易确定是否存在更简单的解决方案。
public sealed class Certificates
{
private static Certificates instance = null;
private static readonly object padlock = new object();
Certificates()
{
}
public static Certificates Instance
{
get
{
lock (padlock)
{
if (instance == null)
{
instance = new Certificates();
}
return instance;
}
}
}
public void GetCertificatesAutomatically()
{
ServicePointManager.ServerCertificateValidationCallback +=
new RemoteCertificateValidationCallback((sender, certificate, chain, policyErrors)
=> { return true; });
}
private static bool RemoteCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
//Return true if the server certificate is ok
if (sslPolicyErrors == SslPolicyErrors.None)
return true;
bool acceptCertificate = true;
string msg = "The server could not be validated for the following reason(s):\r\n";
//The server did not present a certificate
if ((sslPolicyErrors &
SslPolicyErrors.RemoteCertificateNotAvailable) == SslPolicyErrors.RemoteCertificateNotAvailable)
{
msg = msg + "\r\n -The server did not present a certificate.\r\n";
acceptCertificate = false;
}
else
{
//The certificate does not match the server name
if ((sslPolicyErrors &
SslPolicyErrors.RemoteCertificateNameMismatch) == SslPolicyErrors.RemoteCertificateNameMismatch)
{
msg = msg + "\r\n -The certificate name does not match the authenticated name.\r\n";
acceptCertificate = false;
}
//There is some other problem with the certificate
if ((sslPolicyErrors &
SslPolicyErrors.RemoteCertificateChainErrors) == SslPolicyErrors.RemoteCertificateChainErrors)
{
foreach (X509ChainStatus item in chain.ChainStatus)
{
if (item.Status != X509ChainStatusFlags.RevocationStatusUnknown &&
item.Status != X509ChainStatusFlags.OfflineRevocation)
break;
if (item.Status != X509ChainStatusFlags.NoError)
{
msg = msg + "\r\n -" + item.StatusInformation;
acceptCertificate = false;
}
}
}
}
//If Validation failed, present message box
if (acceptCertificate == false)
{
msg = msg + "\r\nDo you wish to override the security check?";
// if (MessageBox.Show(msg, "Security Alert: Server could not be validated",
// MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1) == DialogResult.Yes)
acceptCertificate = true;
}
return acceptCertificate;
}
}
只需在执行Web请求之前调用该方法。
Certificates.Instance.GetCertificatesAutomatically();
如果我们能够看到(代码)您如何进行网络请求,它还有助于诊断问题。
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