458 lines
13 KiB
C#
458 lines
13 KiB
C#
#region License
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/*
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* WebSocketService.cs
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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.Collections.Specialized;
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using System.Text;
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using System.Threading;
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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 basic functions of the WebSocket service used by the WebSocket service host.
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/// </summary>
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/// <remarks>
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/// The WebSocketService class is an abstract class.
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/// </remarks>
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public abstract class WebSocketService : IWebSocketSession
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{
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#region Private Fields
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private WebSocket _websocket;
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private WebSocketContext _context;
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private WebSocketSessionManager _sessions;
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private DateTime _start;
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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="WebSocketService"/> class.
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/// </summary>
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public WebSocketService ()
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{
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IsBound = false;
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_start = DateTime.MaxValue;
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}
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#endregion
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#region Protected Properties
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/// <summary>
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/// Gets or sets the logging functions.
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/// </summary>
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/// <remarks>
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/// If you want to change the current logger to the service own logger, you set this property
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/// to a new <see cref="Logger"/> instance that you created.
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/// </remarks>
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/// <value>
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/// A <see cref="Logger"/> that provides the logging functions.
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/// </value>
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protected Logger Log {
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get {
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return IsBound
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? _websocket.Log
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: null;
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}
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set {
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if (IsBound)
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_websocket.Log = value;
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}
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}
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/// <summary>
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/// Gets the manager of the sessions to the WebSocket service.
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/// </summary>
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/// <value>
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/// A <see cref="WebSocketSessionManager"/> that manages the sessions to the WebSocket service.
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/// </value>
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protected WebSocketSessionManager Sessions {
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get {
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return _sessions;
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}
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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 WebSocket connection request information.
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/// </summary>
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/// <value>
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/// A <see cref="WebSocketContext"/> that contains the WebSocket connection request information.
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/// </value>
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public WebSocketContext Context {
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get {
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return _context;
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}
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}
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/// <summary>
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/// Gets the unique ID of the current <see cref="WebSocketService"/> instance.
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/// </summary>
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/// <value>
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/// A <see cref="string"/> that contains the unique ID.
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/// </value>
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public string ID {
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get; private set;
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}
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/// <summary>
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/// Gets a value indicating whether the current <see cref="WebSocketService"/> instance
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/// has been bound to a <see cref="WebSocket"/>.
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/// </summary>
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/// <value>
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/// <c>true</c> if the current <see cref="WebSocketService"/> instance has been bound to
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/// a <see cref="WebSocket"/>; otherwise, <c>false</c>.
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/// </value>
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public bool IsBound {
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get; private set;
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}
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/// <summary>
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/// Gets the time that the current <see cref="WebSocketService"/> instance has been started.
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/// </summary>
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/// <value>
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/// A <see cref="DateTime"/> that represents the time that the current <see cref="WebSocketService"/>
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/// instance has been started.
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/// </value>
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public DateTime StartTime {
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get {
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return _start;
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}
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}
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/// <summary>
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/// Gets the state of the WebSocket connection.
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/// </summary>
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/// <value>
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/// One of the <see cref="WebSocketState"/> values.
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/// </value>
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public WebSocketState State {
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get {
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return IsBound
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? _websocket.ReadyState
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: WebSocketState.CONNECTING;
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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 onClose (object sender, CloseEventArgs e)
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{
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if (ID == null)
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return;
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_sessions.Remove (ID);
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OnClose (e);
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}
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private void onError (object sender, ErrorEventArgs e)
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{
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OnError (e);
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}
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private void onMessage (object sender, MessageEventArgs e)
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{
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OnMessage (e);
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}
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private void onOpen (object sender, EventArgs e)
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{
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ID = _sessions.Add (this);
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if (ID == null)
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{
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_websocket.Close (CloseStatusCode.AWAY);
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return;
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}
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_start = DateTime.Now;
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OnOpen ();
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}
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#endregion
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#region Internal Methods
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internal void Bind (WebSocketContext context, WebSocketSessionManager sessions)
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{
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if (IsBound)
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return;
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_context = context;
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_sessions = sessions;
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_websocket = context.WebSocket;
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_websocket.CookiesValidation = ValidateCookies;
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_websocket.OnOpen += onOpen;
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_websocket.OnMessage += onMessage;
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_websocket.OnError += onError;
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_websocket.OnClose += onClose;
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IsBound = true;
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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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/// Calls the <see cref="OnError"/> method with the specified <paramref name="message"/>.
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/// </summary>
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/// <param name="message">
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/// A <see cref="string"/> that contains an error message.
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/// </param>
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protected virtual void Error (string message)
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{
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if (!message.IsNullOrEmpty ())
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OnError (new ErrorEventArgs (message));
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}
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/// <summary>
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/// Is called when the WebSocket connection has been closed.
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/// </summary>
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/// <param name="e">
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/// A <see cref="CloseEventArgs"/> that contains an event data associated with
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/// an inner <see cref="WebSocket.OnClose"/> event.
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/// </param>
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protected virtual void OnClose (CloseEventArgs e)
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{
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}
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/// <summary>
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/// Is called when the inner <see cref="WebSocket"/> or current <see cref="WebSocketService"/>
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/// gets an error.
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/// </summary>
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/// <param name="e">
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/// An <see cref="ErrorEventArgs"/> that contains an event data associated with
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/// an inner <see cref="WebSocket.OnError"/> event.
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/// </param>
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protected virtual void OnError (ErrorEventArgs e)
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{
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}
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/// <summary>
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/// Is called when the inner <see cref="WebSocket"/> receives a data frame.
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/// </summary>
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/// <param name="e">
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/// A <see cref="MessageEventArgs"/> that contains an event data associated with
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/// an inner <see cref="WebSocket.OnMessage"/> event.
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/// </param>
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protected virtual void OnMessage (MessageEventArgs e)
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{
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}
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/// <summary>
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/// Is called when the WebSocket connection has been established.
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/// </summary>
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protected virtual void OnOpen ()
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{
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}
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/// <summary>
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/// Validates the cookies used in the WebSocket connection request.
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/// </summary>
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/// <remarks>
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/// This method is called when the inner <see cref="WebSocket"/> validates
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/// the WebSocket connection request.
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/// </remarks>
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/// <returns>
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/// <c>true</c> if the cookies is valid; otherwise, <c>false</c>.
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/// The default returns <c>true</c>.
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/// </returns>
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/// <param name="request">
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/// A <see cref="CookieCollection"/> that contains a collection of the HTTP Cookies
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/// to validate.
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/// </param>
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/// <param name="response">
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/// A <see cref="CookieCollection"/> that receives the HTTP Cookies to send to the client.
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/// </param>
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protected virtual bool ValidateCookies (CookieCollection request, CookieCollection response)
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{
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return true;
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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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/// Sends a Ping to the client of the current <see cref="WebSocketService"/> instance.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the current <see cref="WebSocketService"/> instance receives a Pong
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/// from the client in a time; otherwise, <c>false</c>.
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/// </returns>
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public bool Ping ()
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{
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return IsBound
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? _websocket.Ping ()
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: false;
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}
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/// <summary>
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/// Sends a Ping with the specified <paramref name="message"/> to the client of
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/// the current <see cref="WebSocketService"/> instance.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the current <see cref="WebSocketService"/> instance receives a Pong
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/// from the client in a time; otherwise, <c>false</c>.
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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 bool Ping (string message)
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{
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return IsBound
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? _websocket.Ping (message)
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: false;
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}
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/// <summary>
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/// Sends a binary <paramref name="data"/> to the client of the current
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/// <see cref="WebSocketService"/> instance.
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/// </summary>
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/// <param name="data">
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/// An array of <see cref="byte"/> that contains a binary data to send.
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/// </param>
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public virtual void Send (byte [] data)
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{
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if (IsBound)
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_websocket.Send (data);
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}
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/// <summary>
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/// Sends a text <paramref name="data"/> to the client of the current
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/// <see cref="WebSocketService"/> instance.
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/// </summary>
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/// <param name="data">
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/// A <see cref="string"/> that contains a text data to send.
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/// </param>
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public virtual void Send (string data)
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{
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if (IsBound)
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_websocket.Send (data);
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}
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/// <summary>
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/// Sends a binary <paramref name="data"/> to the client of the current
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/// <see cref="WebSocketService"/> instance asynchronously.
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/// </summary>
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/// <param name="data">
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/// An array of <see cref="byte"/> that contains a binary data to send.
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/// </param>
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/// <param name="completed">
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/// An <see cref="Action"/> delegate that references the method(s) called when
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/// the asynchronous operation completes.
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/// </param>
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public virtual void SendAsync (byte [] data, Action completed)
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{
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if (IsBound)
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_websocket.SendAsync (data, completed);
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}
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/// <summary>
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/// Sends a text <paramref name="data"/> to the client of the current
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/// <see cref="WebSocketService"/> instance asynchronously.
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/// </summary>
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/// <param name="data">
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/// A <see cref="string"/> that contains a text data to send.
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/// </param>
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/// <param name="completed">
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/// An <see cref="Action"/> delegate that references the method(s) called when
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/// the asynchronous operation completes.
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/// </param>
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public virtual void SendAsync (string data, Action completed)
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{
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if (IsBound)
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_websocket.SendAsync (data, completed);
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}
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/// <summary>
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/// Starts the current <see cref="WebSocketService"/> instance.
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/// </summary>
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public void Start ()
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{
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if (IsBound)
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_websocket.Connect ();
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}
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/// <summary>
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/// Stops the current <see cref="WebSocketService"/> instance.
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/// </summary>
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public void Stop ()
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{
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if (IsBound)
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_websocket.Close ();
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}
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/// <summary>
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/// Stops the current <see cref="WebSocketService"/> instance with the specified
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/// <see cref="ushort"/> and <see cref="string"/>.
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/// </summary>
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/// <param name="code">
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/// A <see cref="ushort"/> that contains a status code indicating the reason for stop.
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/// </param>
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/// <param name="reason">
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/// A <see cref="string"/> that contains the reason for stop.
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/// </param>
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public void Stop (ushort code, string reason)
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{
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if (IsBound)
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_websocket.Close (code, reason);
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}
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/// <summary>
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/// Stops the current <see cref="WebSocketService"/> instance with the specified
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/// <see cref="CloseStatusCode"/> and <see cref="string"/>.
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/// </summary>
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/// <param name="code">
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/// One of the <see cref="CloseStatusCode"/> values that indicates a status code
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/// indicating the reason for stop.
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/// </param>
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/// <param name="reason">
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/// A <see cref="string"/> that contains the reason for stop.
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/// </param>
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public void Stop (CloseStatusCode code, string reason)
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{
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if (IsBound)
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_websocket.Close (code, reason);
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}
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#endregion
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}
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}
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