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EasyClientBase.cs
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EasyClientBase.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using SuperSocket.ProtoBase;
namespace SuperSocket.ClientEngine
{
public abstract class EasyClientBase
{
private IClientSession m_Session;
private TaskCompletionSource<bool> m_ConnectTaskSource;
private TaskCompletionSource<bool> m_CloseTaskSource;
private bool m_Connected = false;
protected IPipelineProcessor PipeLineProcessor { get; set; }
#if !NETFX_CORE || NETSTANDARD
public SecurityOption Security { get; set; }
#endif
#if !SILVERLIGHT
private EndPoint m_EndPointToBind;
private EndPoint m_LocalEndPoint;
public EndPoint LocalEndPoint
{
get
{
if (m_LocalEndPoint != null)
return m_LocalEndPoint;
return m_EndPointToBind;
}
set
{
m_EndPointToBind = value;
}
}
#endif
public bool NoDelay { get; set; }
public int ReceiveBufferSize { get; set; }
public IProxyConnector Proxy { get; set; }
public Socket Socket
{
get
{
var session = m_Session;
if (session == null)
return null;
return session.Socket;
}
}
public EasyClientBase()
{
}
public bool IsConnected { get { return m_Connected; } }
#if AWAIT
public async Task<bool> ConnectAsync(EndPoint remoteEndPoint)
{
if (PipeLineProcessor == null)
throw new Exception("This client has not been initialized.");
var connectTaskSrc = InitConnect(remoteEndPoint);
return await connectTaskSrc.Task.ConfigureAwait(false);
}
#else
public Task<bool> ConnectAsync(EndPoint remoteEndPoint)
{
if (PipeLineProcessor == null)
throw new Exception("This client has not been initialized.");
var connectTaskSrc = InitConnect(remoteEndPoint);
return connectTaskSrc.Task;
}
#endif
private TcpClientSession GetUnderlyingSession()
{
#if NETFX_CORE && !NETSTANDARD
return new AsyncTcpSession();
#else
var security = Security;
if (security == null)
{
return new AsyncTcpSession();
}
#if SILVERLIGHT
// no SSL/TLS enabled
if (!security.EnabledSslProtocols)
{
return new AsyncTcpSession();
}
return new SslStreamTcpSession();
#else
// no SSL/TLS enabled
if (security.EnabledSslProtocols == System.Security.Authentication.SslProtocols.None)
{
return new AsyncTcpSession();
}
return new SslStreamTcpSession()
{
Security = security
};
#endif
#endif
}
private TaskCompletionSource<bool> InitConnect(EndPoint remoteEndPoint)
{
var session = GetUnderlyingSession();
#if !SILVERLIGHT
var localEndPoint = m_EndPointToBind;
if (localEndPoint != null)
{
session.LocalEndPoint = m_EndPointToBind;
}
#endif
session.NoDelay = NoDelay;
if (Proxy != null)
session.Proxy = Proxy;
session.Connected += new EventHandler(OnSessionConnected);
session.Error += new EventHandler<ErrorEventArgs>(OnSessionError);
session.Closed += new EventHandler(OnSessionClosed);
session.DataReceived += new EventHandler<DataEventArgs>(OnSessionDataReceived);
if (ReceiveBufferSize > 0)
session.ReceiveBufferSize = ReceiveBufferSize;
m_Session = session;
var taskSrc = m_ConnectTaskSource = new TaskCompletionSource<bool>();
session.Connect(remoteEndPoint);
return taskSrc;
}
public void Send(byte[] data)
{
Send(new ArraySegment<byte>(data, 0, data.Length));
}
public void Send(ArraySegment<byte> segment)
{
var session = m_Session;
if(!m_Connected || session == null)
throw new Exception("The socket is not connected.");
session.Send(segment);
}
public void Send(List<ArraySegment<byte>> segments)
{
var session = m_Session;
if(!m_Connected || session == null)
throw new Exception("The socket is not connected.");
session.Send(segments);
}
#if AWAIT
public async Task<bool> Close()
{
var session = m_Session;
if(session != null && m_Connected)
{
var closeTaskSrc = new TaskCompletionSource<bool>();
m_CloseTaskSource = closeTaskSrc;
session.Close();
return await closeTaskSrc.Task.ConfigureAwait(false);
}
return await Task.FromResult(false);
}
#else
public Task<bool> Close()
{
var session = m_Session;
if(session != null && m_Connected)
{
var closeTaskSrc = new TaskCompletionSource<bool>();
m_CloseTaskSource = closeTaskSrc;
session.Close();
return closeTaskSrc.Task;
}
return new Task<bool>(() => false);
}
#endif
void OnSessionDataReceived(object sender, DataEventArgs e)
{
ProcessResult result;
try
{
result = PipeLineProcessor.Process(new ArraySegment<byte>(e.Data, e.Offset, e.Length));
}
catch(Exception exc)
{
OnError(exc);
m_Session.Close();
return;
}
if (result.State == ProcessState.Error)
{
m_Session.Close();
return;
}
else if (result.State == ProcessState.Cached)
{
// allocate new receive buffer if the previous one was cached
var session = m_Session;
if (session != null)
{
var bufferSetter = session as IBufferSetter;
if (bufferSetter != null)
{
bufferSetter.SetBuffer(new ArraySegment<byte>(new byte[session.ReceiveBufferSize]));
}
}
}
if (result.Packages != null && result.Packages.Count > 0)
{
foreach (var item in result.Packages)
{
HandlePackage(item);
}
}
}
void OnSessionError(object sender, ErrorEventArgs e)
{
if (!m_Connected)
{
FinishConnectTask(false);
}
OnError(e);
}
bool FinishConnectTask(bool result)
{
var connectTaskSource = m_ConnectTaskSource;
if (connectTaskSource == null)
return false;
if (Interlocked.CompareExchange(ref m_ConnectTaskSource, null, connectTaskSource) == connectTaskSource)
{
connectTaskSource.SetResult(result);
return true;
}
return false;
}
private void OnError(Exception e)
{
OnError(new ErrorEventArgs(e));
}
private void OnError(ErrorEventArgs args)
{
var handler = Error;
if(handler != null)
handler(this, args);
}
public event EventHandler<ErrorEventArgs> Error;
void OnSessionClosed(object sender, EventArgs e)
{
m_Connected = false;
#if !SILVERLIGHT
m_LocalEndPoint = null;
#endif
var pipelineProcessor = PipeLineProcessor;
if (pipelineProcessor != null)
pipelineProcessor.Reset();
var handler = Closed;
if (handler != null)
handler(this, EventArgs.Empty);
var closeTaskSrc = m_CloseTaskSource;
if(closeTaskSrc != null)
{
if(Interlocked.CompareExchange(ref m_CloseTaskSource, null, closeTaskSrc) == closeTaskSrc)
{
closeTaskSrc.SetResult(true);
}
}
}
public event EventHandler Closed;
void OnSessionConnected(object sender, EventArgs e)
{
m_Connected = true;
#if !SILVERLIGHT
TcpClientSession session = sender as TcpClientSession;
if (session != null)
{
m_LocalEndPoint = session.LocalEndPoint;
}
#endif
FinishConnectTask(true);
var handler = Connected;
if(handler != null)
{
handler(this, EventArgs.Empty);
}
}
public event EventHandler Connected;
protected abstract void HandlePackage(IPackageInfo package);
}
}