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

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using System.Net;

using System.Net.Sockets;

using System.Text;

namespace NetCoreServer

{

/// <summary>

/// WebSocket secure client

/// </summary>

/// <remarks>WebSocket secure client is used to communicate with secure WebSocket server. Thread-safe.</remarks>

public class WssClient : HttpsClient, IWebSocket

{

internal readonly WebSocket WebSocket;

/// <summary>

/// Initialize WebSocket client with a given IP address and port number

/// </summary>

/// <param name="context">SSL context</param>

/// <param name="address">IP address</param>

/// <param name="port">Port number</param>

public WssClient(SslContext context, IPAddress address, int port) : base(context, address, port) { WebSocket = new WebSocket(this); }

/// <summary>

/// Initialize WebSocket client with a given IP address and port number

/// </summary>

/// <param name="context">SSL context</param>

/// <param name="address">IP address</param>

/// <param name="port">Port number</param>

public WssClient(SslContext context, string address, int port) : base(context, address, port) { WebSocket = new WebSocket(this); }

/// <summary>

/// Initialize WebSocket client with a given DNS endpoint

/// </summary>

/// <param name="context">SSL context</param>

/// <param name="endpoint">DNS endpoint</param>

public WssClient(SslContext context, DnsEndPoint endpoint) : base(context, endpoint) { WebSocket = new WebSocket(this); }

/// <summary>

/// Initialize WebSocket client with a given IP endpoint

/// </summary>

/// <param name="context">SSL context</param>

/// <param name="endpoint">IP endpoint</param>

public WssClient(SslContext context, IPEndPoint endpoint) : base(context, endpoint) { WebSocket = new WebSocket(this); }

/// <summary>

/// WebSocket random nonce

/// </summary>

public byte[] WsNonce => WebSocket.WsNonce;

#region WebSocket connection methods

public override bool Connect() { _syncConnect = true; return base.Connect(); }

public override bool ConnectAsync() { _syncConnect = false; return base.ConnectAsync(); }

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

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

#endregion

#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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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, true, 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 OnHandshaked()

{

// Clear WebSocket send/receive buffers

WebSocket.ClearWsBuffers();

// Fill the WebSocket upgrade HTTP request

OnWsConnecting(Request);

// Send the WebSocket upgrade HTTP request

if (_syncConnect)

SendRequest(Request);

else

SendRequestAsync(Request);

}

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 OnReceivedResponseHeader(HttpResponse response)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

return;

// Try to perform WebSocket upgrade

if (!WebSocket.PerformClientUpgrade(response, Id))

{

base.OnReceivedResponseHeader(response);

return;

}

protected override void OnReceivedResponse(HttpResponse response)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

{

// Prepare receive frame from the remaining response body

var body = Response.Body;

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

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

return;

}

base.OnReceivedResponse(response);

}

protected override void OnReceivedResponseError(HttpResponse response, string error)

{

// Check for WebSocket handshaked status

if (WebSocket.WsHandshaked)

{

OnError(new SocketError());

return;

}

base.OnReceivedResponseError(response, 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) { CloseAsync(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); }

#endregion

// Sync connect flag

private bool _syncConnect;

}

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

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