Caching

2026-06-13 14:38:43 +00:00 · 2026-06-02 19:27:40 +03:00
parent f3bfed4f77
commit 24cf15dec7
3 changed files with 0 additions and 520 deletions
@@ -1,520 +0,0 @@
 /*
 Copyright (c) 2017 Ahmed Kh. Zamil
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Net.Sockets;
 using System.Net;
 using Esiur.Misc;
 using Esiur.Core;
 using System.Threading;
 using Esiur.Resource;
 using System.Threading.Tasks;
 using Esiur.Data;
 namespace Esiur.Net.Sockets;
 public class TcpSocket : ISocket
 {
    public INetworkReceiver<ISocket> Receiver { get; set; }
    Socket sock;
    byte[] receiveBuffer;
    bool held;
    public Socket Socket => sock;
    int bytesSent, bytesReceived;
    public int BytesSent => bytesSent;
    public int BytesReceived => bytesReceived; 
    //ArraySegment<byte> receiveBufferSegment;
    NetworkBuffer receiveNetworkBuffer = new NetworkBuffer();
    readonly object sendLock = new object();
    Queue<KeyValuePair<AsyncReply<bool>, byte[]>> sendBufferQueue = new Queue<KeyValuePair<AsyncReply<bool>, byte[]>>();// Queue<byte[]>();
    bool asyncSending;
    bool began = false;
    SocketState state = SocketState.Initial;
    //public event ISocketReceiveEvent OnReceive;
    //public event ISocketConnectEvent OnConnect;
    //public event ISocketCloseEvent OnClose;
    public event DestroyedEvent OnDestroy;
    //SocketAsyncEventArgs socketArgs = new SocketAsyncEventArgs();
    //private AsyncCallback receiveCallback;
    //private AsyncCallback sendCallback;
    public AsyncReply<bool> BeginAsync()
    {
        return new AsyncReply<bool>(Begin());
    }
    private AsyncReply<bool> currentReply = null;
    public bool Begin()
    {
        // Socket destroyed
        if (receiveBuffer == null)
            return false;
        if (began)
            return false;
        began = true;
        /*
        socketArgs.SetBuffer(receiveBuffer, 0, receiveBuffer.Length);
        socketArgs.Completed += SocketArgs_Completed;
        if (!sock.ReceiveAsync(socketArgs))
            SocketArgs_Completed(null, socketArgs);
            */
        //receiveCallback = new AsyncCallback(ReceiveCallback);
        //sendCallback = new AsyncCallback(SendCallback);
        sock.BeginReceive(receiveBuffer, 0, receiveBuffer.Length, SocketFlags.None, ReceiveCallback, this);
        //sock.ReceiveAsync(receiveBufferSegment, SocketFlags.None).ContinueWith(DataReceived);
        return true;
    }
    private static void ReceiveCallback(IAsyncResult ar)
    {
        var socket = ar.AsyncState as TcpSocket;
        try
        {
            if (socket.state != SocketState.Established)
                return;
            var recCount = socket.sock.EndReceive(ar);
            if (recCount > 0)
            {
                socket.bytesReceived += recCount;
                socket.receiveNetworkBuffer.Write(socket.receiveBuffer, 0, (uint)recCount);
                socket.Receiver?.NetworkReceive(socket, socket.receiveNetworkBuffer);
                if (socket.state == SocketState.Established)
                    socket.sock.BeginReceive(socket.receiveBuffer, 0, socket.receiveBuffer.Length, SocketFlags.None, ReceiveCallback, socket);
            }
            else
            {
                socket.Close();
                return;
            }
        }
        catch //(Exception ex)
        {
            if (socket.state != SocketState.Closed && !socket.sock.Connected)
            {
                //socket.state = SocketState.Terminated;
                socket.Close();
            }
            //Global.Log("TCPSocket", LogType.Error, ex.ToString());
        }
    }
    public AsyncReply<bool> Connect(string hostname, ushort port)
    {
        var rt = new AsyncReply<bool>();
        try
        {
            state = SocketState.Connecting;
            sock.ConnectAsync(hostname, port).ContinueWith((x) =>
            {
                if (x.IsFaulted)
                    rt.TriggerError(x.Exception);
                else
                {
                    state = SocketState.Established;
                    //OnConnect?.Invoke();
                    Receiver?.NetworkConnect(this);
                    Begin();
                    rt.Trigger(true);
                }
            });
        }
        catch (Exception ex)
        {
            rt.TriggerError(ex);
        }
        return rt;
    }
    public IPEndPoint LocalEndPoint
    {
        get { return (IPEndPoint)sock.LocalEndPoint; }
    }
    public TcpSocket()
    {
        sock = new Socket(AddressFamily.InterNetwork,
                             SocketType.Stream,
                             ProtocolType.Tcp);
        receiveBuffer = new byte[sock.ReceiveBufferSize];
        //receiveBufferSegment = new ArraySegment<byte>(receiveBuffer);
    }
    public TcpSocket(string hostname, ushort port)
    {
        // create the socket
        sock = new Socket(AddressFamily.InterNetwork,
                                         SocketType.Stream,
                                         ProtocolType.Tcp);
        receiveBuffer = new byte[sock.ReceiveBufferSize];
        //receiveBufferSegment = new ArraySegment<byte>(receiveBuffer);
        Connect(hostname, port);
    }
    public TcpSocket(IPEndPoint localEndPoint)
    {
        // create the socket
        sock = new Socket(AddressFamily.InterNetwork,
                                         SocketType.Stream,
                                         ProtocolType.Tcp);
        receiveBuffer = new byte[sock.ReceiveBufferSize];
        state = SocketState.Listening;
        // bind
        sock.Bind(localEndPoint);
        // start listening
        sock.Listen(UInt16.MaxValue);
    }
    public IPEndPoint RemoteEndPoint
    {
        get { return (IPEndPoint)sock.RemoteEndPoint; }
    }
    public SocketState State
    {
        get
        {
            return state;
        }
    }
    public TcpSocket(Socket socket)
    {
        sock = socket;
        receiveBuffer = new byte[sock.ReceiveBufferSize];
        // receiveBufferSegment = new ArraySegment<byte>(receiveBuffer);
        if (socket.Connected)
            state = SocketState.Established;
    }
    public void Close()
    {
        if (state == SocketState.Closed)
            return; // && state != SocketState.Terminated)
        state = SocketState.Closed;
        if (sock.Connected)
        {
            try
            {
                sock.Shutdown(SocketShutdown.Both);
            }
            catch
            {
            }
        }
        try
        {
            sendBufferQueue?.Clear();
            Receiver?.NetworkClose(this);
        }
        catch (Exception ex)
        {
            Global.Log(ex);
        }
    }
    public void Send(byte[] message)
    {
        Send(message, 0, message.Length);
    }
    public void Send(byte[] message, int offset, int size)
    {
        if (state == SocketState.Closed)// || state == SocketState.Terminated)
            return;
        bytesSent += size;
        var msg = message.Clip((uint)offset, (uint)size);
        lock (sendLock)
        {
            if (state == SocketState.Closed)// || state == SocketState.Terminated)
                return;
            if (!sock.Connected)
                return;
            if (asyncSending || held)
            {
                sendBufferQueue.Enqueue(new KeyValuePair<AsyncReply<bool>, byte[]>(null, msg));// message.Clip((uint)offset, (uint)size));
            }
            else
            {
                asyncSending = true;
                try
                {
                    sock.BeginSend(msg, 0, msg.Length, SocketFlags.None, SendCallback, this);
                }
                catch
                {
                    asyncSending = false;
                    //state = SocketState.Closed;//.Terminated;
                    Close();
                }
                //sock.SendAsync(new ArraySegment<byte>(msg), SocketFlags.None).ContinueWith(DataSent);
            }
        }
    }
    private static void Flush(TcpSocket socket)
    {
        lock (socket.sendLock)
        {
            socket.currentReply?.Trigger(true);
            socket.currentReply = null;
            if (socket.state == SocketState.Closed) //|| socket.state == SocketState.Terminated)
                return;
            if (socket.sendBufferQueue.Count > 0)
            {
                var kv = socket.sendBufferQueue.Dequeue();
                try
                {
                    socket.currentReply = kv.Key;
                    socket.sock.BeginSend(kv.Value, 0, kv.Value.Length, SocketFlags.None,
                                                SendCallback, socket);
                }
                catch (Exception ex)
                {
                    socket.asyncSending = false;
                    try
                    {
                        kv.Key?.Trigger(false);
                        if (socket.state != SocketState.Closed && !socket.sock.Connected)
                        {
                            // socket.state = SocketState.Closed;// Terminated;
                            socket.Close();
                        }
                    }
                    catch //(Exception ex2)
                    {
                        socket.Close();
                        //socket.state = SocketState.Closed;// .Terminated;
                    }
                    Global.Log("TCPSocket", LogType.Error, ex.ToString());
                }
            }
            else
            {
                socket.asyncSending = false;
            }
        }
    }
    private static void SendCallback(IAsyncResult ar)
    {
        try
        {
            var socket = (TcpSocket)ar.AsyncState;
            socket.sock?.EndSend(ar);
            Flush(socket);
        }
        catch (Exception ex)
        {
            Global.Log(ex);
        }
    }
    public bool Trigger(ResourceTrigger trigger)
    {
        return true;
    }
    public void Destroy()
    {
        Close();
        receiveNetworkBuffer = null;
        //receiveCallback = null;
        //sendCallback = null;
        sock = null;
        receiveBuffer = null;
        receiveNetworkBuffer = null;
        sendBufferQueue = null;
        //socketArgs.Completed -= SocketArgs_Completed;
        //socketArgs.Dispose();
        //socketArgs = null;
        OnDestroy?.Invoke(this);
        OnDestroy = null;
    }
    public ISocket Accept()
    {
        try
        {
            var s = sock.Accept();
            return new TcpSocket(s);
        }
        catch
        {
            state = SocketState.Closed;// Terminated;
            return null;
        }
    }
    public async AsyncReply<ISocket> AcceptAsync()
    {
        try
        {
            var s = await sock.AcceptAsync();
            return new TcpSocket(s);
        }
        catch
        {
            state = SocketState.Closed;// Terminated;
            return null;
        }
    }
    public void Hold()
    {
        held = true;
    }
    public void Unhold()
    {
        try
        {
            Flush(this);
            //SendCallback(null);
        }
        catch (Exception ex)
        {
            Global.Log(ex);
        }
        finally
        {
            held = false;
        }
    }
    public AsyncReply<bool> SendAsync(byte[] message, int offset, int length)
    {
        if (state == SocketState.Closed) 
            return new AsyncReply<bool>(false);
        var msg = message.Clip((uint)offset, (uint)length);
        lock (sendLock)
        {
            if (state == SocketState.Closed) 
                return new AsyncReply<bool>(false);
            if (!sock.Connected)
                return new AsyncReply<bool>(false);
            var rt = new AsyncReply<bool>();
            if (asyncSending || held)
            {
                sendBufferQueue.Enqueue(new KeyValuePair<AsyncReply<bool>, byte[]>(rt, msg));
            }
            else
            {
                asyncSending = true;
                try
                {
                    currentReply = rt;
                    sock.BeginSend(msg, 0, msg.Length, SocketFlags.None, SendCallback, this); 
                }
                catch (Exception ex)
                {
                    rt.TriggerError(ex);
                    asyncSending = false;
                    Close();
                }
                //sock.SendAsync(new ArraySegment<byte>(msg), SocketFlags.None).ContinueWith(DataSent);
            }
            return rt;
        }
    }
 }