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663 lines
21 KiB
C#
663 lines
21 KiB
C#
#region License
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/*
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* WebSocketServer.cs
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*
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* A C# implementation of the WebSocket protocol server.
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*
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* The MIT License
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*
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* Copyright (c) 2012-2013 sta.blockhead
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.Net.Sockets;
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using System.Text;
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using WebSocketSharp.Net;
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using WebSocketSharp.Net.WebSockets;
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namespace WebSocketSharp.Server
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{
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/// <summary>
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/// Provides the functions of the server that receives the WebSocket connection requests.
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/// </summary>
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/// <remarks>
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/// The WebSocketServer class provides the multi WebSocket service.
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/// </remarks>
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public class WebSocketServer : WebSocketServerBase
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{
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#region Private Fields
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private ServiceHostManager _serviceHosts;
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#endregion
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#region Public Constructors
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class.
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/// </summary>
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public WebSocketServer ()
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: this (80)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class that listens for
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/// incoming connection attempts on the specified <paramref name="port"/>.
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/// </summary>
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/// <param name="port">
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/// An <see cref="int"/> that contains a port number.
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/// </param>
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public WebSocketServer (int port)
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: this (System.Net.IPAddress.Any, port)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class that listens for
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/// incoming connection attempts on the specified WebSocket URL.
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/// </summary>
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/// <param name="url">
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/// A <see cref="string"/> that contains a WebSocket URL.
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/// </param>
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public WebSocketServer (string url)
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: base (url)
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{
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if (BaseUri.AbsolutePath != "/")
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throw new ArgumentException ("Must not contain the path component: " + url, "url");
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_serviceHosts = new ServiceHostManager (Log);
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class that listens for
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/// incoming connection attempts on the specified <paramref name="port"/> and <paramref name="secure"/>.
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/// </summary>
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/// <param name="port">
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/// An <see cref="int"/> that contains a port number.
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/// </param>
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/// <param name="secure">
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/// A <see cref="bool"/> that indicates providing a secure connection or not.
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/// (<c>true</c> indicates providing a secure connection.)
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/// </param>
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public WebSocketServer (int port, bool secure)
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: this (System.Net.IPAddress.Any, port, secure)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class that listens for
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/// incoming connection attempts on the specified <paramref name="address"/> and <paramref name="port"/>.
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/// </summary>
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/// <param name="address">
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/// A <see cref="System.Net.IPAddress"/> that contains a local IP address.
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/// </param>
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/// <param name="port">
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/// An <see cref="int"/> that contains a port number.
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/// </param>
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public WebSocketServer (System.Net.IPAddress address, int port)
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: this (address, port, port == 443 ? true : false)
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{
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="WebSocketServer"/> class that listens for
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/// incoming connection attempts on the specified <paramref name="address"/>, <paramref name="port"/>
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/// and <paramref name="secure"/>.
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/// </summary>
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/// <param name="address">
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/// A <see cref="System.Net.IPAddress"/> that contains a local IP address.
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/// </param>
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/// <param name="port">
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/// An <see cref="int"/> that contains a port number.
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/// </param>
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/// <param name="secure">
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/// A <see cref="bool"/> that indicates providing a secure connection or not.
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/// (<c>true</c> indicates providing a secure connection.)
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/// </param>
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public WebSocketServer (System.Net.IPAddress address, int port, bool secure)
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: base (address, port, "/", secure)
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{
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_serviceHosts = new ServiceHostManager (Log);
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}
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#endregion
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#region Public Properties
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/// <summary>
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/// Gets the connection count to the <see cref="WebSocketServer"/>.
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/// </summary>
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/// <value>
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/// An <see cref="int"/> that contains the connection count.
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/// </value>
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public int ConnectionCount {
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get {
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return _serviceHosts.ConnectionCount;
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether the server cleans up the inactive WebSocket service
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/// instances periodically.
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/// </summary>
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/// <value>
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/// <c>true</c> if the server cleans up the inactive WebSocket service instances every 60 seconds;
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/// otherwise, <c>false</c>. The default value is <c>true</c>.
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/// </value>
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public bool KeepClean {
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get {
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return _serviceHosts.KeepClean;
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}
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set {
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_serviceHosts.KeepClean = value;
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}
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}
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/// <summary>
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/// Gets the collection of paths associated with the every WebSocket services that the server provides.
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/// </summary>
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/// <value>
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/// An IEnumerable<string> that contains the collection of paths.
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/// </value>
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public IEnumerable<string> ServicePaths {
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get {
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var url = BaseUri.IsAbsoluteUri
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? BaseUri.ToString ().TrimEnd ('/')
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: String.Empty;
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foreach (var path in _serviceHosts.Paths)
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yield return url + path;
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}
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}
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#endregion
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#region Private Methods
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private void stop (ushort code, string reason)
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{
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var data = code.Append (reason);
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if (data.Length > 125)
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{
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var msg = "The payload length of a Close frame must be 125 bytes or less.";
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Log.Error (String.Format ("{0}\ncode: {1}\nreason: {2}", msg, code, reason));
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Error (msg);
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return;
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}
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base.Stop ();
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_serviceHosts.Stop (code, reason);
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}
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#endregion
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#region Protected Methods
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/// <summary>
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/// Accepts a WebSocket connection request.
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/// </summary>
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/// <param name="context">
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/// A <see cref="TcpListenerWebSocketContext"/> that contains the WebSocket connection request objects.
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/// </param>
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protected override void AcceptWebSocket (TcpListenerWebSocketContext context)
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{
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var ws = context.WebSocket;
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var path = context.Path.UrlDecode ();
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ws.Log = Log;
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IServiceHost host;
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if (!_serviceHosts.TryGetServiceHost (path, out host))
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{
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ws.Close (HttpStatusCode.NotImplemented);
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return;
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}
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if (BaseUri.IsAbsoluteUri)
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ws.Url = new Uri (BaseUri, path);
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host.BindWebSocket (context);
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}
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#endregion
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#region Public Methods
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/// <summary>
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/// Adds the specified typed WebSocket service with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service.
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/// </param>
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/// <typeparam name="T">
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/// The type of the WebSocket service. The T must inherit the <see cref="WebSocketService"/> class.
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/// </typeparam>
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public void AddWebSocketService<T> (string servicePath)
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where T : WebSocketService, new ()
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{
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string msg;
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if (!servicePath.IsValidAbsolutePath (out msg))
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{
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Log.Error (msg);
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Error (msg);
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return;
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}
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var host = new WebSocketServiceHost<T> (Log);
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host.Uri = BaseUri.IsAbsoluteUri
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? new Uri (BaseUri, servicePath)
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: servicePath.ToUri ();
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if (!KeepClean)
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host.KeepClean = false;
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_serviceHosts.Add (servicePath, host);
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}
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/// <summary>
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/// Broadcasts the specified array of <see cref="byte"/> to all clients.
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/// </summary>
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/// <param name="data">
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/// An array of <see cref="byte"/> to broadcast.
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/// </param>
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public void Broadcast (byte [] data)
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{
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if (data == null)
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{
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var msg = "'data' must not be null.";
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Log.Error (msg);
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Error (msg);
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return;
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}
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_serviceHosts.Broadcast (data);
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}
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/// <summary>
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/// Broadcasts the specified <see cref="string"/> to all clients.
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/// </summary>
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/// <param name="data">
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/// A <see cref="string"/> to broadcast.
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/// </param>
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public void Broadcast (string data)
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{
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if (data == null)
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{
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var msg = "'data' must not be null.";
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Log.Error (msg);
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Error (msg);
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return;
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}
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_serviceHosts.Broadcast (data);
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}
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/// <summary>
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/// Broadcasts the specified array of <see cref="byte"/> to all clients of the WebSocket service
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/// with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the WebSocket service is found; otherwise, <c>false</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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/// <param name="data">
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/// An array of <see cref="byte"/> to broadcast.
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/// </param>
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public bool BroadcastTo (string servicePath, byte [] data)
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{
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var msg = servicePath.IsNullOrEmpty ()
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? "'servicePath' must not be null or empty."
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: data == null
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? "'data' must not be null."
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: String.Empty;
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if (msg.Length > 0)
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{
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Log.Error (msg);
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Error (msg);
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return false;
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}
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return _serviceHosts.BroadcastTo (servicePath, data);
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}
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/// <summary>
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/// Broadcasts the specified <see cref="string"/> to all clients of the WebSocket service
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/// with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the WebSocket service is found; otherwise, <c>false</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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/// <param name="data">
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/// A <see cref="string"/> to broadcast.
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/// </param>
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public bool BroadcastTo (string servicePath, string data)
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{
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var msg = servicePath.IsNullOrEmpty ()
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? "'servicePath' must not be null or empty."
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: data == null
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? "'data' must not be null."
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: String.Empty;
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if (msg.Length > 0)
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{
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Log.Error (msg);
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Error (msg);
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return false;
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}
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return _serviceHosts.BroadcastTo (servicePath, data);
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}
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/// <summary>
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/// Sends Pings with the specified <see cref="string"/> to all clients.
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/// </summary>
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/// <returns>
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/// A Dictionary<string, Dictionary<string, bool>> that contains the collection of
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/// service paths and pairs of ID and value indicating whether the <see cref="WebSocketServer"/>
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/// received the Pongs from each clients in a time.
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/// </returns>
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/// <param name="message">
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/// A <see cref="string"/> that contains a message to send.
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/// </param>
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public Dictionary<string, Dictionary<string, bool>> Broadping (string message)
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{
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if (message.IsNullOrEmpty ())
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return _serviceHosts.Broadping (String.Empty);
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var len = Encoding.UTF8.GetBytes (message).Length;
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if (len > 125)
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{
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var msg = "The payload length of a Ping frame must be 125 bytes or less.";
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Log.Error (msg);
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Error (msg);
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return null;
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}
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return _serviceHosts.Broadping (message);
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}
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/// <summary>
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/// Sends Pings with the specified <see cref="string"/> to all clients of the WebSocket service
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/// with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <returns>
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/// A Dictionary<string, bool> that contains the collection of session IDs and values
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/// indicating whether the <see cref="WebSocketServer"/> received the Pongs from each clients
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/// in a time. If the WebSocket service is not found, returns <see langword="null"/>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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/// <param name="message">
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/// A <see cref="string"/> that contains a message to send.
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/// </param>
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public Dictionary<string, bool> BroadpingTo (string servicePath, string message)
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{
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if (message == null)
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message = String.Empty;
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var msg = servicePath.IsNullOrEmpty ()
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? "'servicePath' must not be null or empty."
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: Encoding.UTF8.GetBytes (message).Length > 125
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? "The payload length of a Ping frame must be 125 bytes or less."
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: String.Empty;
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if (msg.Length > 0)
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{
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Log.Error (msg);
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Error (msg);
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return null;
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}
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return _serviceHosts.BroadpingTo (servicePath, message);
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}
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/// <summary>
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/// Gets the connection count to the WebSocket service with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <returns>
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/// An <see cref="int"/> that contains the connection count if the WebSocket service is successfully found;
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/// otherwise, <c>-1</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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public int GetConnectionCount (string servicePath)
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{
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if (servicePath.IsNullOrEmpty ())
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{
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var msg = "'servicePath' must not be null or empty.";
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Log.Error (msg);
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Error (msg);
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return -1;
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}
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return _serviceHosts.GetConnectionCount (servicePath);
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}
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/// <summary>
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/// Sends a Ping with the specified <see cref="string"/> to the client associated with
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/// the specified <paramref name="servicePath"/> and <paramref name="id"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the <see cref="WebSocketServer"/> receives a Pong from the client in a time;
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/// otherwise, <c>false</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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/// <param name="id">
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/// A <see cref="string"/> that contains an ID that represents the destination for the Ping.
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/// </param>
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/// <param name="message">
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/// A <see cref="string"/> that contains a message to send.
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/// </param>
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public bool PingTo (string servicePath, string id, string message)
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{
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if (message == null)
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message = String.Empty;
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var msg = servicePath.IsNullOrEmpty ()
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? "'servicePath' must not be null or empty."
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: id.IsNullOrEmpty ()
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? "'id' must not be null or empty."
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: Encoding.UTF8.GetBytes (message).Length > 125
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? "The payload length of a Ping frame must be 125 bytes or less."
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: String.Empty;
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if (msg.Length > 0)
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{
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Log.Error (msg);
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Error (msg);
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return false;
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}
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return _serviceHosts.PingTo (servicePath, id, message);
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}
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/// <summary>
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/// Removes the WebSocket service with the specified <paramref name="servicePath"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the WebSocket service is successfully found and removed; otherwise, <c>false</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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public bool RemoveWebSocketService (string servicePath)
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{
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if (servicePath.IsNullOrEmpty ())
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{
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var msg = "'servicePath' must not be null or empty.";
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Log.Error (msg);
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Error (msg);
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return false;
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}
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return _serviceHosts.Remove (servicePath);
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}
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/// <summary>
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/// Sends a binary data to the client associated with the specified <paramref name="servicePath"/> and
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/// <paramref name="id"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the client is successfully found; otherwise, <c>false</c>.
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/// </returns>
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/// <param name="servicePath">
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/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
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/// </param>
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/// <param name="id">
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/// A <see cref="string"/> that contains an ID that represents the destination for the data.
|
|
/// </param>
|
|
/// <param name="data">
|
|
/// An array of <see cref="byte"/> that contains a binary data to send.
|
|
/// </param>
|
|
public bool SendTo (string servicePath, string id, byte [] data)
|
|
{
|
|
var msg = servicePath.IsNullOrEmpty ()
|
|
? "'servicePath' must not be null or empty."
|
|
: id.IsNullOrEmpty ()
|
|
? "'id' must not be null or empty."
|
|
: data == null
|
|
? "'data' must not be null."
|
|
: String.Empty;
|
|
|
|
if (msg.Length > 0)
|
|
{
|
|
Log.Error (msg);
|
|
Error (msg);
|
|
|
|
return false;
|
|
}
|
|
|
|
return _serviceHosts.SendTo (servicePath, id, data);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sends a text data to the client associated with the specified <paramref name="servicePath"/> and
|
|
/// <paramref name="id"/>.
|
|
/// </summary>
|
|
/// <returns>
|
|
/// <c>true</c> if the client is successfully found; otherwise, <c>false</c>.
|
|
/// </returns>
|
|
/// <param name="servicePath">
|
|
/// A <see cref="string"/> that contains an absolute path to the WebSocket service to find.
|
|
/// </param>
|
|
/// <param name="id">
|
|
/// A <see cref="string"/> that contains an ID that represents the destination for the data.
|
|
/// </param>
|
|
/// <param name="data">
|
|
/// A <see cref="string"/> that contains a text data to send.
|
|
/// </param>
|
|
public bool SendTo (string servicePath, string id, string data)
|
|
{
|
|
var msg = servicePath.IsNullOrEmpty ()
|
|
? "'servicePath' must not be null or empty."
|
|
: id.IsNullOrEmpty ()
|
|
? "'id' must not be null or empty."
|
|
: data == null
|
|
? "'data' must not be null."
|
|
: String.Empty;
|
|
|
|
if (msg.Length > 0)
|
|
{
|
|
Log.Error (msg);
|
|
Error (msg);
|
|
|
|
return false;
|
|
}
|
|
|
|
return _serviceHosts.SendTo (servicePath, id, data);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops receiving the WebSocket connection requests.
|
|
/// </summary>
|
|
public override void Stop ()
|
|
{
|
|
base.Stop ();
|
|
_serviceHosts.Stop ();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops receiving the WebSocket connection requests with the specified <see cref="ushort"/> and
|
|
/// <see cref="string"/>.
|
|
/// </summary>
|
|
/// <param name="code">
|
|
/// A <see cref="ushort"/> that contains a status code indicating the reason for stop.
|
|
/// </param>
|
|
/// <param name="reason">
|
|
/// A <see cref="string"/> that contains the reason for stop.
|
|
/// </param>
|
|
public void Stop (ushort code, string reason)
|
|
{
|
|
if (!code.IsCloseStatusCode ())
|
|
{
|
|
var msg = "Invalid status code for stop.";
|
|
Log.Error (String.Format ("{0}\ncode: {1}", msg, code));
|
|
Error (msg);
|
|
|
|
return;
|
|
}
|
|
|
|
stop (code, reason);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops receiving the WebSocket connection requests with the specified <see cref="CloseStatusCode"/>
|
|
/// and <see cref="string"/>.
|
|
/// </summary>
|
|
/// <param name="code">
|
|
/// A <see cref="CloseStatusCode"/> that contains a status code indicating the reason for stop.
|
|
/// </param>
|
|
/// <param name="reason">
|
|
/// A <see cref="string"/> that contains the reason for stop.
|
|
/// </param>
|
|
public void Stop (CloseStatusCode code, string reason)
|
|
{
|
|
stop ((ushort) code, reason);
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|