/// <summary>
/// Asynchronously connects to Rserve identified by an IP address.
/// </summary>
/// <param name="addr">
/// Address of the Rserve server, or nothing for localhost
/// </param>
/// <param name="port">
/// Port on which the server listens
/// </param>
/// <param name="credentials">
/// Credentials for authentication or <c>null</c> for anonymous
/// </param>
/// <param name="timeout">
/// Optional timeout, defaults to one second
/// </param>
public static async Task <RConnection> ConnectAsync(
IPAddress addr = null,
int port = 6311,
NetworkCredential credentials = null,
TimeSpan?timeout = null)
{
var ipe = new IPEndPoint(addr ?? new IPAddress(new byte[] { 127, 0, 0, 1 }), port);
Socket socket = null;
try
{
socket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
// Connect with timeout
// From http://stackoverflow.com/questions/1062035/how-to-config-socket-connect-timeout-in-c-sharp
var connectTask = socket.ConnectAsync(ipe);
var timeoutTask = Task.Delay(timeout ?? TimeSpan.FromSeconds(1));
var completedTask = await Task.WhenAny(connectTask, timeoutTask).ContinueContextFree();
if (completedTask == timeoutTask)
{
connectTask.IgnoreFault();
await timeoutTask.ContinueContextFree();
throw new SocketException((int)SocketError.TimedOut);
}
await connectTask.ContinueContextFree();
if (!socket.Connected)
{
return(null);
}
var connection = new RConnection(ref socket);
await connection.InitAsync(credentials?.UserName, credentials?.Password).ContinueContextFree();
return(connection);
}
finally
{
socket?.Dispose();
}
}
/// <summary>
/// Asynchronously connects to Rserve identified by an IP address.
/// </summary>
/// <param name="addr">
/// Address of the Rserve server, or nothing for localhost
/// </param>
/// <param name="port">
/// Port on which the server listens
/// </param>
/// <param name="credentials">
/// Credentials for authentication or <c>null</c> for anonymous
/// </param>
public static async Task<RConnection> ConnectAsync(IPAddress addr = null, int port = 6311, NetworkCredential credentials = null)
{
var ipe = new IPEndPoint(addr ?? new IPAddress(new byte[] { 127, 0, 0, 1 }), port);
Socket socket = null;
try
{
socket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
// Connect with a one-second timeout
// From http://stackoverflow.com/questions/1062035/how-to-config-socket-connect-timeout-in-c-sharp
var connectTask = socket.ConnectAsync(ipe);
var timeoutTask = Task.Delay(TimeSpan.FromSeconds(1));
var completedTask = await Task.WhenAny(connectTask, timeoutTask)
.ContinueContextFree();
if (completedTask == timeoutTask)
{
connectTask.IgnoreFault();
await timeoutTask.ContinueContextFree();
throw new SocketException((int)SocketError.TimedOut);
}
await connectTask.ContinueContextFree();
if (!socket.Connected)
return null;
var connection = new RConnection(ref socket);
await connection.InitAsync(credentials?.UserName, credentials?.Password).ContinueContextFree();
return connection;
}
finally
{
socket?.Dispose();
}
}
RConnection(RConnection connection) :
this(ref connection._socket)
{
_protocol = connection._protocol;
_connectionParameters = connection._connectionParameters;
}
RConnection(RConnection connection) :
this(ref connection._socket)
{
_protocol = connection._protocol;
_connectionParameters = connection._connectionParameters;
}