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using System;

using System.IO;

using System.Collections.Generic;

using System.Net;

using System.Net.Sockets;

using System.Text;

using System.Threading;

public class ClientSocket : BaseSocket, IDisposable {

private bool _isDisposed;

private IPEndPoint _remotePoint;

private TcpClient _tcpClient;

private Thread _thread;

private bool _running;

private int _receives;

private int _errors;

private object _errors_lock = new object();

private object _write_lock = new object();

private Dictionary<int, SyncReceive> _receiveHandlers = new Dictionary<int, SyncReceive>();

private object _receiveHandlers_lock = new object();

private DateTime _lastActive;

public event ClientSocketClosedEventHandler Closed;

public event ClientSocketReceiveEventHandler Receive;

public event ClientSocketErrorEventHandler Error;

public void Connect(string hostname, int port) {

if (this._isDisposed == false && this._running == false) {

this._running = true;

try {

IPAddress[] ips = Dns.GetHostAddresses(hostname);

if (ips.Length == 0) throw new Exception("无法解析“" + hostname + "”");

this._remotePoint = new IPEndPoint(ips[0], port);

this._tcpClient = new TcpClient();

this._tcpClient.Connect(this._remotePoint);

} catch (Exception ex) {

this._running = false;

this.OnError(ex);

this.OnClosed();

return;

}

this._receives = 0;

this._errors = 0;

this._lastActive = DateTime.Now;

this._thread = new Thread(delegate() {

while (this._running) {

try {

NetworkStream ns = this._tcpClient.GetStream();

ns.ReadTimeout = 1000 * 20;

if (ns.DataAvailable) {

SocketMessager messager = base.Read(ns);

if (string.Compare(messager.Action, SocketMessager.SYS_TEST_LINK.Action) == 0) {

} else if (this._receives == 0 &&

string.Compare(messager.Action, SocketMessager.SYS_HELLO_WELCOME.Action) == 0) {

this._receives++;

this.Write(messager);

} else if (string.Compare(messager.Action, SocketMessager.SYS_ACCESS_DENIED.Action) == 0) {

throw new Exception(SocketMessager.SYS_ACCESS_DENIED.Action);

} else {

ClientSocketReceiveEventArgs e = new ClientSocketReceiveEventArgs(this._receives++, messager);

SyncReceive receive = null;

if (this._receiveHandlers.TryGetValue(messager.Id, out receive)) {

new Thread(delegate() {

try {

receive.ReceiveHandler(this, e);

} catch (Exception ex) {

this.OnError(ex);

} finally {

receive.Wait.Set();

}

}).Start();

} else if (this.Receive != null) {

new Thread(delegate() {

this.OnReceive(e);

}).Start();

}

}

this._lastActive = DateTime.Now;

} else {

TimeSpan ts = DateTime.Now - _lastActive;

if (ts.TotalSeconds > 3) {

this.Write(SocketMessager.SYS_TEST_LINK);

}

}

if (!ns.DataAvailable) Thread.CurrentThread.Join(1);

} catch (Exception ex) {

this._running = false;

this.OnError(ex);

}

}

this.Close();

this.OnClosed();

});

this._thread.Start();

}

}

public void Close() {

this._running = false;

if (this._tcpClient != null) {

this._tcpClient.Close();

}

int[] keys = new int[this._receiveHandlers.Count];

try {

this._receiveHandlers.Keys.CopyTo(keys, 0);

} catch {

lock (this._receiveHandlers_lock) {

keys = new int[this._receiveHandlers.Count];

this._receiveHandlers.Keys.CopyTo(keys, 0);

}

}

foreach (int key in keys) {

SyncReceive receiveHandler = null;

if (this._receiveHandlers.TryGetValue(key, out receiveHandler)) {

receiveHandler.Wait.Set();

}

}

lock (this._receiveHandlers_lock) {

this._receiveHandlers.Clear();

}

}

public void Write(SocketMessager messager) {

this.Write(messager, null, TimeSpan.Zero);

}

public void Write(SocketMessager messager, ClientSocketReceiveEventHandler receiveHandler) {

this.Write(messager, receiveHandler, TimeSpan.FromSeconds(20));

}

public void Write(SocketMessager messager, ClientSocketReceiveEventHandler receiveHandler, TimeSpan timeout) {

SyncReceive syncReceive = null;

try {

if (receiveHandler != null) {

syncReceive = new SyncReceive(receiveHandler);

lock (this._receiveHandlers_lock) {

if (!this._receiveHandlers.ContainsKey(messager.Id)) {

this._receiveHandlers.Add(messager.Id, syncReceive);

} else {

this._receiveHandlers[messager.Id] = syncReceive;

}

}

}

lock (_write_lock) {

NetworkStream ns = this._tcpClient.GetStream();

base.Write(ns, messager);

}

this._lastActive = DateTime.Now;

if (syncReceive != null) {

syncReceive.Wait.Reset();

syncReceive.Wait.WaitOne(timeout, false);

syncReceive.Wait.Set();

lock (this._receiveHandlers_lock) {

this._receiveHandlers.Remove(messager.Id);

}

}

} catch (Exception ex) {

this._running = false;

this.OnError(ex);

if (syncReceive != null) {

syncReceive.Wait.Set();

lock (this._receiveHandlers_lock) {

this._receiveHandlers.Remove(messager.Id);

}

}

}

}

protected virtual void OnClosed(EventArgs e) {

if (this.Closed != null) {

new Thread(delegate() {

try {

this.Closed(this, e);

} catch (Exception ex) {

this.OnError(ex);

}

}).Start();

}

}

protected void OnClosed() {

this.OnClosed(new EventArgs());

}

protected virtual void OnReceive(ClientSocketReceiveEventArgs e) {

if (this.Receive != null) {

try {

this.Receive(this, e);

} catch (Exception ex) {

this.OnError(ex);

}

}

}

protected virtual void OnError(ClientSocketErrorEventArgs e) {

if (this.Error != null) {

this.Error(this, e);

}

}

protected void OnError(Exception ex) {

int errors = 0;

lock (this._errors_lock) {

errors = ++this._errors;

}

ClientSocketErrorEventArgs e = new ClientSocketErrorEventArgs(ex, errors);

this.OnError(e);

}

public bool Running {

get { return this._running; }

}

class SyncReceive : IDisposable {

private ClientSocketReceiveEventHandler _receiveHandler;

private ManualResetEvent _wait;

public SyncReceive(ClientSocketReceiveEventHandler receiveHandler) {

this._receiveHandler = receiveHandler;

this._wait = new ManualResetEvent(false);

}

public ClientSocketReceiveEventHandler ReceiveHandler {

get { return _receiveHandler; }

}

public ManualResetEvent Wait {

get { return _wait; }

}

#region IDisposable 成员

public void Dispose() {

this._wait.Set();

this._wait.Close();

}

#endregion

}

#region IDisposable 成员

public void Dispose() {

this._isDisposed = true;

this.Close();

}

#endregion

}

public delegate void ClientSocketClosedEventHandler(object sender, EventArgs e);

public delegate void ClientSocketErrorEventHandler(object sender, ClientSocketErrorEventArgs e);

public delegate void ClientSocketReceiveEventHandler(object sender, ClientSocketReceiveEventArgs e);

public class ClientSocketErrorEventArgs : EventArgs {

private int _errors;

private Exception _exception;

public ClientSocketErrorEventArgs(Exception exception, int errors) {

this._exception = exception;

this._errors = errors;

}

public int Errors {

get { return _errors; }

}

public Exception Exception {

get { return _exception; }

}

}

public class ClientSocketReceiveEventArgs : EventArgs {

private int _receives;

private SocketMessager _messager;

public ClientSocketReceiveEventArgs(int receives, SocketMessager messager) {

this._receives = receives;

this._messager = messager;

}

public int Receives {

get { return _receives; }

}

public SocketMessager Messager {

get { return _messager; }

}

}