#region MIT License /** * WsStream.cs * * The MIT License * * Copyright (c) 2010-2012 sta.blockhead * * 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. */ #endregion using System; using System.Collections.Generic; using System.Configuration; using System.IO; using System.Net; using System.Net.Sockets; using System.Security.Cryptography.X509Certificates; using System.Text; using WebSocketSharp.Frame; using WebSocketSharp.Net.Security; namespace WebSocketSharp { internal class WsStream : IDisposable { #region Fields private Stream _innerStream; private bool _isSecure; private Object _forRead; private Object _forWrite; #endregion #region Private Constructor private WsStream() { _forRead = new object(); _forWrite = new object(); } #endregion #region Public Constructors public WsStream(NetworkStream innerStream) : this() { if (innerStream == null) throw new ArgumentNullException("innerStream"); _innerStream = innerStream; _isSecure = false; } public WsStream(SslStream innerStream) : this() { if (innerStream == null) throw new ArgumentNullException("innerStream"); _innerStream = innerStream; _isSecure = true; } #endregion #region Properties public bool DataAvailable { get { return _isSecure ? ((SslStream)_innerStream).DataAvailable : ((NetworkStream)_innerStream).DataAvailable; } } public bool IsSecure { get { return _isSecure; } } #endregion #region Private Methods private int read(byte[] buffer, int offset, int size) { var readLen = _innerStream.Read(buffer, offset, size); if (readLen < size) { var msg = String.Format("Data can not be read from {0}.", _innerStream.GetType().Name); throw new IOException(msg); } return readLen; } private int readByte() { return _innerStream.ReadByte(); } private string[] readHandshake() { var buffer = new List(); while (true) { if (Ext.EqualsAndSaveTo(readByte(), '\r', buffer) && Ext.EqualsAndSaveTo(readByte(), '\n', buffer) && Ext.EqualsAndSaveTo(readByte(), '\r', buffer) && Ext.EqualsAndSaveTo(readByte(), '\n', buffer)) break; } return Encoding.UTF8.GetString(buffer.ToArray()) .Replace("\r\n", "\n").Replace("\n\n", "\n").TrimEnd('\n') .Split('\n'); } private void write(byte[] buffer, int offset, int count) { _innerStream.Write(buffer, offset, count); } private void writeByte(byte value) { _innerStream.WriteByte(value); } #endregion #region Internal Methods internal static WsStream CreateClientStream(TcpClient client, string host, bool secure) { var netStream = client.GetStream(); if (secure) { System.Net.Security.RemoteCertificateValidationCallback validationCb = (sender, certificate, chain, sslPolicyErrors) => { // FIXME: Always returns true return true; }; var sslStream = new SslStream(netStream, false, validationCb); sslStream.AuthenticateAsClient(host); return new WsStream(sslStream); } return new WsStream(netStream); } internal static WsStream CreateServerStream(TcpClient client, bool secure) { var netStream = client.GetStream(); if (secure) { var sslStream = new SslStream(netStream, false); var certPath = ConfigurationManager.AppSettings["ServerCertPath"]; sslStream.AuthenticateAsServer(new X509Certificate2(certPath)); return new WsStream(sslStream); } return new WsStream(netStream); } internal static WsStream CreateServerStream(WebSocketSharp.Net.HttpListenerContext context) { var conn = context.Connection; var stream = conn.Stream; return conn.IsSecure ? new WsStream((SslStream)stream) : new WsStream((NetworkStream)stream); } #endregion #region Public Methods public void Close() { _innerStream.Close(); } public void Dispose() { _innerStream.Dispose(); } public WsFrame ReadFrame() { lock (_forRead) { try { return WsFrame.Parse(_innerStream); } catch { return null; } } } public void ReadFrameAsync(Action completed) { WsFrame.ParseAsync(_innerStream, completed); } public string[] ReadHandshake() { lock (_forRead) { try { return readHandshake(); } catch { return null; } } } public bool WriteFrame(WsFrame frame) { lock (_forWrite) { try { var buffer = frame.ToBytes(); write(buffer, 0, buffer.Length); return true; } catch { return false; } } } public bool WriteHandshake(Handshake handshake) { lock (_forWrite) { try { var buffer = handshake.ToBytes(); write(buffer, 0, buffer.Length); return true; } catch { return false; } } } #endregion } }