Socket Async Receive Data to LinkedList Buffer (echo server)

namespace Test
{
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.IO;
using System.Threading;
using Microshaoft;
public class AsyncSocketAsyncDataQueueHandlerEchoServer
{
public static void StartListening()
{
//IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
IPAddress ipAddress;
IPAddress.TryParse("127.0.0.1", out ipAddress);
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 12021);
Socket listener = new Socket
(
AddressFamily.InterNetwork
, SocketType.Stream
, ProtocolType.Tcp
);
listener.Bind(localEndPoint);
Console.WriteLine("Listening ...");
listener.Listen(10);
int i = 0;
while (true)
{
int id = i++;
UserToken token = new UserToken();
token.ConnectionID = id;
Socket socket = listener.Accept();
Console.WriteLine("accept");
SocketAsyncDataHandler<UserToken> handler = new SocketAsyncDataHandler<UserToken>(socket, token);
handler.ReceiveDataBufferLength = 1;
handler.ID = id;
handler.StartReceiveData();
new Thread
(
delegate()
{
StartReadData(handler);
}
).Start();
}
}
static void StartReadData(SocketAsyncDataHandler<UserToken> handler)
{
while (true)
{
string s = Console.ReadLine();
int l = 4;
int.TryParse(s, out l);
if (l == 0)
{
l = 4095;
}
byte[] buffer = new byte[l];
int r = handler.ReadData(buffer);
if (r < l)
{
Array.Resize<byte>(ref buffer, r);
}
s = Encoding.ASCII.GetString(buffer);
//Console.WriteLine("[{0}],[{1}],[{2}]", sender.Token.ConnectionID, s, data.Length);
Console.WriteLine("[{0}]",s);
}
}
static void handler_AsyncDataReceivedCompleted(SocketAsyncDataHandler<UserToken> sender, byte[] data)
{
//throw new NotImplementedException();
string s = Encoding.ASCII.GetString(data);
//Console.WriteLine("[{0}],[{1}],[{2}]", sender.Token.ConnectionID, s, data.Length);
Console.Write(s);
//sender.SendDataAsync(data);
}
public static int Main(String[] args)
{
StartListening();
return 0;
}
}
public class UserToken
{
public string UserID;
public int ConnectionID;
}
}
namespace Microshaoft
{
using System;
using System.Net.Sockets;
using System.Collections.Generic;
public class SocketAsyncDataHandler<T>
{
private LinkedList<byte[]> _receivedDataLinkedList = new LinkedList<byte[]>();
public delegate void DataEventHandler(SocketAsyncDataHandler<T> sender, byte[] data);
public event DataEventHandler AsyncDataReceivedCompleted;
private object _syncLockObject = new object();
private T _token;
public T Token
{
get
{
return _token;
}
}
public SocketAsyncDataHandler(Socket socket, T token)
{
_socket = socket;
_token = token;
}
public int ReadData(byte[] buffer)
{
int l = buffer.Length;
int p = 0;
while (p < l)
{
if (_receivedDataLinkedList.Count <= 0)
{
break;
}
if (_receivedDataLinkedList.First == null)
{
break;
}
byte[] data = _receivedDataLinkedList.First.Value;

int size = ((l - p) > data.Length ? data.Length : (l - p));
if ((l - p) >= data.Length)
{
lock (_syncLockObject)
{
_receivedDataLinkedList.RemoveFirst();
}
}
Buffer.BlockCopy(data, 0, buffer, p, size);
if ((l - p) < data.Length)
{
byte[] newData = new byte[size];
Buffer.BlockCopy(data, data.Length - size, newData, 0, newData.Length);
_receivedDataLinkedList.First.Value = newData;
}
p += size;
}
return p;
}
private Socket _socket;
private int _id;
public int ID
{
set
{
_id = value;
}
get
{
return _id;
}
}
private int _receiveDataBufferLength = 1024;
public int ReceiveDataBufferLength
{
set
{
_receiveDataBufferLength = value;
}
}
public void SendData(byte[] data)
{
_socket.Send(data);
}
public void SendDataAsync(byte[] data)
{
SocketAsyncEventArgs e = new SocketAsyncEventArgs();
e.AcceptSocket = _socket;
e.SetBuffer(data, 0, data.Length);
_socket.SendAsync(e);
}
public void StartReceiveData()
{
SocketAsyncEventArgs e = new SocketAsyncEventArgs();
e.AcceptSocket = _socket;
e.Completed += new EventHandler<SocketAsyncEventArgs>(ReceivedData_Completed);
byte[] buffer = new byte[_receiveDataBufferLength];
e.SetBuffer(buffer, 0, buffer.Length);
_socket.ReceiveAsync(e);
}
private void ReceivedData_Completed(object sender, SocketAsyncEventArgs e)
{
int l = e.BytesTransferred;
if (l > 0)
{
byte[] data = new byte[l];
Buffer.BlockCopy(e.Buffer, 0, data, 0, data.Length);
lock (_syncLockObject)
{
_receivedDataLinkedList.AddLast(data);
}
if (AsyncDataReceivedCompleted != null)
{
AsyncDataReceivedCompleted(this, data);
}

}
_socket.ReceiveAsync(e);
}
}
}