I'm trying to include Google ReCaptcha validation on my project, so in my C# class a have the following code doing the request to validate the key:
try
{
string Response = Request["g-recaptcha-response"];
bool Valid = false;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls | SecurityProtocolType.Ssl3;
ServicePointManager.ServerCertificateValidationCallback = delegate
{
return true;
};
HttpWebRequest req = (HttpWebRequest)WebRequest.Create
("https://www.google.com/recaptcha/api/siteverify?secret=MYKEY&response=" + Response);
using (WebResponse wResponse = req.GetResponse())
{
using (StreamReader readStream = new StreamReader(wResponse.GetResponseStream()))
{
string jsonResponse = readStream.ReadToEnd();
...
}
}
}
catch (WebException ex)
{
...
}
But I keep getting the exception bellow. As I'm including the SecurityProtocol switch I didn't expect to receive this kind of error. Am I missing something here? My project is based on .NET framework 4.5. I already had this kind of error but it was resolved by including the SecurityProtocol switch, but not this time.
The underlying connection was closed: An unexpected error occurred on a send. System.IO.IOException: Authentication failed because the remote party has closed the transport stream. at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async)
