private async void buttonLogin_Click(object sender, EventArgs e)
{
Task <LoginRequestResult> returnedTask = Task.Run(() => LoginRequest());
LoginRequestResult result = await returnedTask;
this.textBoxUsername.Text = result.username;
this.textBoxPassword.Text = result.password;
}
/// <summary>
/// Starts the login service. Overrides abstract base method.
/// </summary>
public override void Run()
{
try
{
base.Start();
while (true)
{
TcpClient client = base.AcceptTcpClient();
Logger.Log(new LogMessage("Client connect request accepted."));
NetworkStream stream = client.GetStream();
byte[] readBuffer = new byte[1024];
if (stream.CanRead)
{
int numbersOfBytesToRead = 0;
do
{
numbersOfBytesToRead = stream.Read(readBuffer, offset: 0, size: readBuffer.Length);
} while(stream.DataAvailable);
UserCredentials credentials = Serializer <UserCredentials> .Deserialize(readBuffer);
LoginRequestResult result = ( LoginRequestResult )HandleLogInRequest(credentials);
if (stream.CanWrite)
{
byte[] writeBuffer = Serializer <LoginRequestResult> .Serialize(result);
stream.Write(writeBuffer, offset: 0, size: writeBuffer.Length);
Logger.Log(new LogMessage("Response to client sent."));
}
client.Close();
Logger.Log(new LogMessage("Client connection closed."));
}
}
}
catch (Exception e)
{
// throw?
Logger.Log(new LogMessage(e));
}
}
/// <summary>
/// Attempts to verify the credentials on the server.
/// </summary>
/// <param name="credentials">The credentials to verify.</param>
/// <param name="user">The instance of the User who has logged in. If login fails this output variable is null.</param>
/// <returns>A value indicating the state of the log in request.</returns>
/// <exception cref="ControllerException"></exception>
public LogInRequestStatus TryLogin(UserCredentials credentials, out User user)
{
NetworkStream stream = null;
try
{
TcpClient client = new TcpClient(serverEndpoint.Address.ToString(), serverEndpoint.Port);
stream = client.GetStream();
}
catch (SocketException se)
{
throw new ControllerException("A networking error occured while atttempting to contact remote server. See inner exception for details.", se);
}
catch (ObjectDisposedException ode)
{
throw new ControllerException("A networking error occured while atttempting to contact remote server. See inner exception for details.", ode);
}
catch (InvalidOperationException ioe)
{
throw new ControllerException("A networking error occured while atttempting to contact remote server. See inner exception for details.", ioe);
}
catch (ArgumentOutOfRangeException aoore)
{
throw new ControllerException("A networking error occured while atttempting to contact remote server. See inner exception for details.", aoore);
}
catch (ArgumentNullException ane)
{
throw new ControllerException("A networking error occured while atttempting to contact remote server. See inner exception for details.", ane);
}
LoginRequestResult result = default(LoginRequestResult);
if (stream.CanWrite)
{
byte[] writeBuffer = Serializer <UserCredentials> .Serialize(credentials);
stream.Write(writeBuffer, offset: 0, size: writeBuffer.Length);
byte[] readBuffer = new byte[1024];
if (stream.CanRead)
{
int numberOfBytesToRead = 0;
do
{
numberOfBytesToRead = stream.Read(readBuffer, offset: 0, size: readBuffer.Length);
} while(stream.DataAvailable);
result = Serializer <LoginRequestResult> .Deserialize(readBuffer);
}
stream.Close();
} // The rest could be nicer and cleaner...
else
{
result = new LoginRequestResult(LogInRequestStatus.NetworkError, user: null);
}
if (result.Status == LogInRequestStatus.Success)
{
user = result.User;
}
else
{
user = null;
}
return(result.Status);
}
