NetCoreServer/source/NetCoreServer/WsSession.cs at master · pythonology/NetCoreServer · GitHub

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using System.Net.Sockets;

using System.Text;

namespace NetCoreServer

{

/// <summary>

/// WebSocket session

/// </summary>

/// <remarks> WebSocket session is used to read and write data from the connected WebSocket client. Thread-safe.</remarks>

public class WsSession : HttpSession, IWebSocket

{

internal readonly WebSocket WebSocket;

public WsSession(WsServer server) : base(server) { WebSocket = new WebSocket(this); }

// WebSocket connection methods

public virtual bool Close(int status) { SendCloseAsync(status, null, 0, 0); base.Disconnect(); return true; }

#region WebSocket send text methods

public long SendText(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_TEXT, false, buffer, offset, size);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public long SendText(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_TEXT, false, data, 0, data.Length);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public bool SendTextAsync(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_TEXT, false, buffer, offset, size);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

public bool SendTextAsync(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_TEXT, false, data, 0, data.Length);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

#endregion

#region WebSocket send binary methods

public long SendBinary(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_BINARY, false, buffer, offset, size);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public long SendBinary(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_BINARY, false, data, 0, data.Length);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public bool SendBinaryAsync(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_BINARY, false, buffer, offset, size);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

public bool SendBinaryAsync(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_BINARY, false, data, 0, data.Length);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

#endregion

#region WebSocket send close methods

public long SendClose(int status, byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_CLOSE, false, buffer, offset, size, status);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public long SendClose(int status, string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_CLOSE, false, data, 0, data.Length, status);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public bool SendCloseAsync(int status, byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_CLOSE, false, buffer, offset, size, status);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

public bool SendCloseAsync(int status, string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_CLOSE, false, data, 0, data.Length, status);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

#endregion

#region WebSocket send ping methods

public long SendPing(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PING, false, buffer, offset, size);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public long SendPing(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PING, false, data, 0, data.Length);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public bool SendPingAsync(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PING, false, buffer, offset, size);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

public bool SendPingAsync(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PING, true, data, 0, data.Length);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

#endregion

#region WebSocket send pong methods

public long SendPong(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PONG, false, buffer, offset, size);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public long SendPong(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PONG, false, data, 0, data.Length);

return base.Send(WebSocket.WsSendBuffer.ToArray());

}

public bool SendPongAsync(byte[] buffer, long offset, long size)

{

lock (WebSocket.WsSendLock)

{

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PONG, false, buffer, offset, size);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

public bool SendPongAsync(string text)

{

lock (WebSocket.WsSendLock)

{

var data = Encoding.UTF8.GetBytes(text);

WebSocket.PrepareSendFrame(WebSocket.WS_FIN | WebSocket.WS_PONG, false, data, 0, data.Length);

return base.SendAsync(WebSocket.WsSendBuffer.ToArray());

}

#endregion

#region WebSocket receive methods

public string ReceiveText()

{

Buffer result = new Buffer();

if (!WebSocket.WsHandshaked)

return result.ExtractString(0, result.Data.Length);

Buffer cache = new Buffer();

// Receive WebSocket frame data

while (!WebSocket.WsFinalReceived)

{

while (!WebSocket.WsFrameReceived)

{

int required = WebSocket.RequiredReceiveFrameSize();

cache.Resize(required);

int received = (int)base.Receive(cache.Data, 0, required);

if (received != required)

return result.ExtractString(0, result.Data.Length);

WebSocket.PrepareReceiveFrame(cache.Data, 0, received);

}

if (!WebSocket.WsFinalReceived)

WebSocket.PrepareReceiveFrame(null, 0, 0);

}

// Copy WebSocket frame data

result.Append(WebSocket.WsReceiveFinalBuffer.ToArray(), 0, WebSocket.WsReceiveFinalBuffer.Count);

WebSocket.PrepareReceiveFrame(null, 0, 0);

return result.ExtractString(0, result.Data.Length);

}

public Buffer ReceiveBinary()

{

Buffer result = new Buffer();

if (!WebSocket.WsHandshaked)

return result;

Buffer cache = new Buffer();

// Receive WebSocket frame data

while (!WebSocket.WsFinalReceived)

{

while (!WebSocket.WsFrameReceived)

{

int required = WebSocket.RequiredReceiveFrameSize();

cache.Resize(required);

int received = (int)base.Receive(cache.Data, 0, required);

if (received != required)

return result;

WebSocket.PrepareReceiveFrame(cache.Data, 0, received);

}

if (!WebSocket.WsFinalReceived)

WebSocket.PrepareReceiveFrame(null, 0, 0);

}

// Copy WebSocket frame data

result.Append(WebSocket.WsReceiveFinalBuffer.ToArray(), 0, WebSocket.WsReceiveFinalBuffer.Count);

WebSocket.PrepareReceiveFrame(null, 0, 0);

return result;

}

#endregion

#region Session handlers

protected override void OnDisconnecting()

{

if (WebSocket.WsHandshaked)

OnWsDisconnecting();

}

protected override void OnDisconnected()

{

// Disconnect WebSocket

if (WebSocket.WsHandshaked)

{

WebSocket.WsHandshaked = false;

OnWsDisconnected();

}

// Reset WebSocket upgrade HTTP request and response

Request.Clear();

Response.Clear();

// Clear WebSocket send/receive buffers

WebSocket.ClearWsBuffers();

// Initialize new WebSocket random nonce

WebSocket.InitWsNonce();

}

protected override void OnReceived(byte[] buffer, long offset, long size)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

{

// Prepare receive frame

WebSocket.PrepareReceiveFrame(buffer, offset, size);

return;

}

base.OnReceived(buffer, offset, size);

}

protected override void OnReceivedRequestHeader(HttpRequest request)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

return;

// Try to perform WebSocket upgrade

if (!WebSocket.PerformServerUpgrade(request, Response))

{

base.OnReceivedRequestHeader(request);

return;

}

protected override void OnReceivedRequest(HttpRequest request)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

{

// Prepare receive frame from the remaining request body

var body = Request.Body;

var data = Encoding.UTF8.GetBytes(body);

WebSocket.PrepareReceiveFrame(data, 0, data.Length);

return;

}

base.OnReceivedRequest(request);

}

protected override void OnReceivedRequestError(HttpRequest request, string error)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

{

OnError(new SocketError());

return;

}

base.OnReceivedRequestError(request, error);

}

#endregion

#region Web socket handlers

public virtual void OnWsConnecting(HttpRequest request) {}

public virtual void OnWsConnected(HttpResponse response) {}

public virtual bool OnWsConnecting(HttpRequest request, HttpResponse response) { return true; }

public virtual void OnWsConnected(HttpRequest request) {}

public virtual void OnWsDisconnecting() {}

public virtual void OnWsDisconnected() {}

public virtual void OnWsReceived(byte[] buffer, long offset, long size) {}

public virtual void OnWsClose(byte[] buffer, long offset, long size) { Close(1000); }

public virtual void OnWsPing(byte[] buffer, long offset, long size) { SendPongAsync(buffer, offset, size); }

public virtual void OnWsPong(byte[] buffer, long offset, long size) {}

public virtual void OnWsError(string error) { OnError(SocketError.SocketError); }

public virtual void OnWsError(SocketError error) { OnError(error); }

public void SendUpgrade(HttpResponse response) { SendResponseAsync(response); }

#endregion

}

NetCoreServer/source/NetCoreServer/WsSession.cs at master · pythonology/NetCoreServer · GitHub

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