From 8ef442c2e8f39307f72bc98d6c79a9b5f09e6d72 Mon Sep 17 00:00:00 2001
From: Luke Pulverenti <luke.pulverenti@gmail.com>
Date: Thu, 3 Nov 2016 18:53:02 -0400
Subject: move classes

---
 .../ServerManager/WebSocketConnection.cs           | 295 +++++++++++++++++++++
 1 file changed, 295 insertions(+)
 create mode 100644 Emby.Server.Implementations/ServerManager/WebSocketConnection.cs

(limited to 'Emby.Server.Implementations/ServerManager/WebSocketConnection.cs')

diff --git a/Emby.Server.Implementations/ServerManager/WebSocketConnection.cs b/Emby.Server.Implementations/ServerManager/WebSocketConnection.cs
new file mode 100644
index 000000000..dd17edea5
--- /dev/null
+++ b/Emby.Server.Implementations/ServerManager/WebSocketConnection.cs
@@ -0,0 +1,295 @@
+using System.Text;
+using MediaBrowser.Common.Events;
+using MediaBrowser.Controller.Net;
+using MediaBrowser.Model.Logging;
+using MediaBrowser.Model.Net;
+using MediaBrowser.Model.Serialization;
+using System;
+using System.Collections.Specialized;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MediaBrowser.Common.IO;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Services;
+using MediaBrowser.Model.TextEncoding;
+using UniversalDetector;
+
+namespace Emby.Server.Implementations.ServerManager
+{
+    /// <summary>
+    /// Class WebSocketConnection
+    /// </summary>
+    public class WebSocketConnection : IWebSocketConnection
+    {
+        public event EventHandler<EventArgs> Closed;
+
+        /// <summary>
+        /// The _socket
+        /// </summary>
+        private readonly IWebSocket _socket;
+
+        /// <summary>
+        /// The _remote end point
+        /// </summary>
+        public string RemoteEndPoint { get; private set; }
+
+        /// <summary>
+        /// The _cancellation token source
+        /// </summary>
+        private readonly CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();
+
+        /// <summary>
+        /// The logger
+        /// </summary>
+        private readonly ILogger _logger;
+
+        /// <summary>
+        /// The _json serializer
+        /// </summary>
+        private readonly IJsonSerializer _jsonSerializer;
+
+        /// <summary>
+        /// Gets or sets the receive action.
+        /// </summary>
+        /// <value>The receive action.</value>
+        public Action<WebSocketMessageInfo> OnReceive { get; set; }
+
+        /// <summary>
+        /// Gets the last activity date.
+        /// </summary>
+        /// <value>The last activity date.</value>
+        public DateTime LastActivityDate { get; private set; }
+
+        /// <summary>
+        /// Gets the id.
+        /// </summary>
+        /// <value>The id.</value>
+        public Guid Id { get; private set; }
+
+        /// <summary>
+        /// Gets or sets the URL.
+        /// </summary>
+        /// <value>The URL.</value>
+        public string Url { get; set; }
+        /// <summary>
+        /// Gets or sets the query string.
+        /// </summary>
+        /// <value>The query string.</value>
+        public QueryParamCollection QueryString { get; set; }
+        private readonly IMemoryStreamProvider _memoryStreamProvider;
+        private readonly IEncoding _textEncoding;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebSocketConnection" /> class.
+        /// </summary>
+        /// <param name="socket">The socket.</param>
+        /// <param name="remoteEndPoint">The remote end point.</param>
+        /// <param name="jsonSerializer">The json serializer.</param>
+        /// <param name="logger">The logger.</param>
+        /// <exception cref="System.ArgumentNullException">socket</exception>
+        public WebSocketConnection(IWebSocket socket, string remoteEndPoint, IJsonSerializer jsonSerializer, ILogger logger, IMemoryStreamProvider memoryStreamProvider, IEncoding textEncoding)
+        {
+            if (socket == null)
+            {
+                throw new ArgumentNullException("socket");
+            }
+            if (string.IsNullOrEmpty(remoteEndPoint))
+            {
+                throw new ArgumentNullException("remoteEndPoint");
+            }
+            if (jsonSerializer == null)
+            {
+                throw new ArgumentNullException("jsonSerializer");
+            }
+            if (logger == null)
+            {
+                throw new ArgumentNullException("logger");
+            }
+
+            Id = Guid.NewGuid();
+            _jsonSerializer = jsonSerializer;
+            _socket = socket;
+            _socket.OnReceiveBytes = OnReceiveInternal;
+            _socket.OnReceive = OnReceiveInternal;
+            RemoteEndPoint = remoteEndPoint;
+            _logger = logger;
+            _memoryStreamProvider = memoryStreamProvider;
+            _textEncoding = textEncoding;
+
+            socket.Closed += socket_Closed;
+        }
+
+        void socket_Closed(object sender, EventArgs e)
+        {
+            EventHelper.FireEventIfNotNull(Closed, this, EventArgs.Empty, _logger);
+        }
+
+        /// <summary>
+        /// Called when [receive].
+        /// </summary>
+        /// <param name="bytes">The bytes.</param>
+        private void OnReceiveInternal(byte[] bytes)
+        {
+            LastActivityDate = DateTime.UtcNow;
+
+            if (OnReceive == null)
+            {
+                return;
+            }
+            var charset = DetectCharset(bytes);
+
+            if (string.Equals(charset, "utf-8", StringComparison.OrdinalIgnoreCase))
+            {
+                OnReceiveInternal(Encoding.UTF8.GetString(bytes, 0, bytes.Length));
+            }
+            else
+            {
+                OnReceiveInternal(_textEncoding.GetASCIIString(bytes, 0, bytes.Length));
+            }
+        }
+        private string DetectCharset(byte[] bytes)
+        {
+            try
+            {
+                using (var ms = _memoryStreamProvider.CreateNew(bytes))
+                {
+                    var detector = new CharsetDetector();
+                    detector.Feed(ms);
+                    detector.DataEnd();
+
+                    var charset = detector.Charset;
+
+                    if (!string.IsNullOrWhiteSpace(charset))
+                    {
+                        //_logger.Debug("UniversalDetector detected charset {0}", charset);
+                    }
+
+                    return charset;
+                }
+            }
+            catch (IOException ex)
+            {
+                _logger.ErrorException("Error attempting to determine web socket message charset", ex);
+            }
+
+            return null;
+        }
+
+        private void OnReceiveInternal(string message)
+        {
+            LastActivityDate = DateTime.UtcNow;
+
+            if (!message.StartsWith("{", StringComparison.OrdinalIgnoreCase))
+            {
+                // This info is useful sometimes but also clogs up the log
+                //_logger.Error("Received web socket message that is not a json structure: " + message);
+                return;
+            }
+
+            if (OnReceive == null)
+            {
+                return;
+            }
+
+            try
+            {
+                var stub = (WebSocketMessage<object>)_jsonSerializer.DeserializeFromString(message, typeof(WebSocketMessage<object>));
+
+                var info = new WebSocketMessageInfo
+                {
+                    MessageType = stub.MessageType,
+                    Data = stub.Data == null ? null : stub.Data.ToString(),
+                    Connection = this
+                };
+
+                OnReceive(info);
+            }
+            catch (Exception ex)
+            {
+                _logger.ErrorException("Error processing web socket message", ex);
+            }
+        }
+
+        /// <summary>
+        /// Sends a message asynchronously.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="message">The message.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">message</exception>
+        public Task SendAsync<T>(WebSocketMessage<T> message, CancellationToken cancellationToken)
+        {
+            if (message == null)
+            {
+                throw new ArgumentNullException("message");
+            }
+
+            var json = _jsonSerializer.SerializeToString(message);
+
+            return SendAsync(json, cancellationToken);
+        }
+
+        /// <summary>
+        /// Sends a message asynchronously.
+        /// </summary>
+        /// <param name="buffer">The buffer.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        public Task SendAsync(byte[] buffer, CancellationToken cancellationToken)
+        {
+            if (buffer == null)
+            {
+                throw new ArgumentNullException("buffer");
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            return _socket.SendAsync(buffer, true, cancellationToken);
+        }
+
+        public Task SendAsync(string text, CancellationToken cancellationToken)
+        {
+            if (string.IsNullOrWhiteSpace(text))
+            {
+                throw new ArgumentNullException("text");
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            return _socket.SendAsync(text, true, cancellationToken);
+        }
+
+        /// <summary>
+        /// Gets the state.
+        /// </summary>
+        /// <value>The state.</value>
+        public WebSocketState State
+        {
+            get { return _socket.State; }
+        }
+
+        /// <summary>
+        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
+        /// </summary>
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        /// <summary>
+        /// Releases unmanaged and - optionally - managed resources.
+        /// </summary>
+        /// <param name="dispose"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
+        protected virtual void Dispose(bool dispose)
+        {
+            if (dispose)
+            {
+                _cancellationTokenSource.Dispose();
+                _socket.Dispose();
+            }
+        }
+    }
+}
-- 
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