466 lines
14 KiB
C#
466 lines
14 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) 2012-2014 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.IO;
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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 provided by the
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/// <see cref="HttpServer"/> or <see cref="WebSocketServer"/>.
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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 WebSocketContext _context;
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private string _protocol;
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private WebSocketSessionManager _sessions;
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private DateTime _start;
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private WebSocket _websocket;
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#endregion
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#region Protected 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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protected WebSocketService ()
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{
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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
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/// set this property 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 _websocket != null
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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 (_websocket != null)
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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
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/// 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 represents the WebSocket connection
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/// request.
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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 represents the unique ID of the current
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/// <see cref="WebSocketService"/> instance.
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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 or sets the subprotocol used on the WebSocket connection.
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/// </summary>
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/// <remarks>
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/// Set operation of this property is available before the connection has
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/// been established.
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/// </remarks>
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/// <value>
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/// <para>
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/// A <see cref="string"/> that represents the subprotocol if any.
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/// </para>
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/// <para>
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/// The value to set must be a token defined in
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/// <see href="http://tools.ietf.org/html/rfc2616#section-2.2">RFC 2616</see>.
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/// </para>
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/// <para>
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/// The default value is <see cref="String.Empty"/>.
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/// </para>
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/// </value>
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public string Protocol {
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get {
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return _websocket != null
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? _websocket.Protocol
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: _protocol ?? String.Empty;
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}
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set {
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if (State == WebSocketState.CONNECTING &&
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value != null &&
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value.Length > 0 &&
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value.IsToken ())
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_protocol = value;
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}
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}
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/// <summary>
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/// Gets the time that the current <see cref="WebSocketService"/> instance
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/// 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
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/// <see cref="WebSocketService"/> 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 that indicate the state of
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/// the WebSocket connection.
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/// </value>
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public WebSocketState State {
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get {
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return _websocket != null
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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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_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 Start (WebSocketContext context, WebSocketSessionManager sessions)
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{
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_context = context;
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_sessions = sessions;
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_websocket = context.WebSocket;
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_websocket.Protocol = _protocol;
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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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_websocket.ConnectAsServer ();
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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
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/// <paramref name="message"/>.
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/// </summary>
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/// <param name="message">
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/// A <see cref="string"/> that represents the error message.
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/// </param>
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protected void Error (string message)
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{
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if (message != null && message.Length > 0)
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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 the event data associated
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/// with 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
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/// <see cref="WebSocketService"/> 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 the event data associated
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/// with 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 the event data associated
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/// with 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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/// Sends a binary <paramref name="data"/> to the client on the current
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/// session in the WebSocket service.
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/// </summary>
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/// <param name="data">
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/// An array of <see cref="byte"/> that represents the binary data to send.
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/// </param>
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protected void Send (byte [] data)
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{
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if (_websocket != null)
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_websocket.Send (data);
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}
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/// <summary>
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/// Sends the specified <paramref name="file"/> as a binary data
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/// to the client on the current session in the WebSocket service.
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/// </summary>
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/// <param name="file">
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/// A <see cref="FileInfo"/> that represents the file to send.
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/// </param>
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protected void Send (FileInfo file)
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{
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if (_websocket != null)
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_websocket.Send (file);
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}
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/// <summary>
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/// Sends a text <paramref name="data"/> to the client on the current
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/// session in the WebSocket service.
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/// </summary>
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/// <param name="data">
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/// A <see cref="string"/> that represents the text data to send.
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/// </param>
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protected void Send (string data)
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{
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if (_websocket != null)
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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"/> asynchronously to the client
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/// on the current session in the WebSocket service.
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/// </summary>
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/// <remarks>
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/// This method doesn't wait for the send to be complete.
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/// </remarks>
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/// <param name="data">
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/// An array of <see cref="byte"/> that represents the binary data to send.
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/// </param>
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/// <param name="completed">
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/// An Action<bool> delegate that references the method(s) called when
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/// the send is complete. A <see cref="bool"/> passed to this delegate is
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/// <c>true</c> if the send is complete successfully; otherwise, <c>false</c>.
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/// </param>
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protected void SendAsync (byte [] data, Action<bool> completed)
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{
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if (_websocket != null)
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_websocket.SendAsync (data, completed);
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}
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/// <summary>
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/// Sends the specified <paramref name="file"/> as a binary data
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/// asynchronously to the client on the current session in the WebSocket
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/// service.
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/// </summary>
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/// <remarks>
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/// This method doesn't wait for the send to be complete.
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/// </remarks>
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/// <param name="file">
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/// A <see cref="FileInfo"/> that represents the file to send.
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/// </param>
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/// <param name="completed">
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/// An Action<bool> delegate that references the method(s) called when
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/// the send is complete. A <see cref="bool"/> passed to this delegate is
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/// <c>true</c> if the send is complete successfully; otherwise, <c>false</c>.
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/// </param>
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protected void SendAsync (FileInfo file, Action<bool> completed)
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{
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if (_websocket != null)
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_websocket.SendAsync (file, completed);
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}
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/// <summary>
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/// Sends a text <paramref name="data"/> asynchronously to the client
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/// on the current session in the WebSocket service.
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/// </summary>
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/// <remarks>
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/// This method doesn't wait for the send to be complete.
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/// </remarks>
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/// <param name="data">
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/// A <see cref="string"/> that represents the text data to send.
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/// </param>
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/// <param name="completed">
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/// An Action<bool> delegate that references the method(s) called when
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/// the send is complete. A <see cref="bool"/> passed to this delegate is
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/// <c>true</c> if the send is complete successfully; otherwise, <c>false</c>.
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/// </param>
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protected void SendAsync (string data, Action<bool> completed)
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{
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if (_websocket != null)
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_websocket.SendAsync (data, completed);
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}
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/// <summary>
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/// Sends a binary data from the specified <see cref="Stream"/> asynchronously
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/// to the client on the current session in the WebSocket service.
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/// </summary>
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/// <remarks>
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/// This method doesn't wait for the send to be complete.
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/// </remarks>
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/// <param name="stream">
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/// A <see cref="Stream"/> from which contains the binary data to send.
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/// </param>
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/// <param name="length">
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/// An <see cref="int"/> that represents the number of bytes to send.
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/// </param>
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/// <param name="completed">
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/// An Action<bool> delegate that references the method(s) called when
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/// the send is complete. A <see cref="bool"/> passed to this delegate is
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/// <c>true</c> if the send is complete successfully; otherwise, <c>false</c>.
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/// </param>
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protected void SendAsync (Stream stream, int length, Action<bool> completed)
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{
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if (_websocket != null)
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_websocket.SendAsync (stream, length, completed);
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}
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/// <summary>
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/// Validates the HTTP 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>. This method
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/// returns <c>true</c> as default.
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/// </returns>
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/// <param name="request">
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/// A <see cref="CookieCollection"/> that contains the collection of the
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/// cookies 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 cookies to send to the
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/// client.
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/// </param>
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protected virtual bool ValidateCookies (
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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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}
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}
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