845 lines
24 KiB
C#
845 lines
24 KiB
C#
#region License
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/*
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* HttpServer.cs
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*
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* A simple HTTP server that allows to accept the WebSocket connection requests.
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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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#region Contributors
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/*
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* Contributors:
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* Juan Manuel Lallana <juan.manuel.lallana@gmail.com>
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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.Diagnostics;
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using System.IO;
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using System.Security.Cryptography.X509Certificates;
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using System.Security.Principal;
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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 a simple HTTP server that allows to accept the WebSocket
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/// connection requests.
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/// </summary>
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/// <remarks>
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/// The HttpServer class can provide the multi WebSocket services.
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/// </remarks>
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public class HttpServer
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{
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#region Private Fields
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private HttpListener _listener;
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private Logger _logger;
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private int _port;
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private Thread _receiveRequestThread;
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private string _rootPath;
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private bool _secure;
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private WebSocketServiceHostManager _serviceHosts;
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private volatile ServerState _state;
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private object _sync;
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private bool _windows;
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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="HttpServer"/> class.
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/// </summary>
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/// <remarks>
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/// An instance initialized by this constructor listens for the incoming
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/// requests on port 80.
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/// </remarks>
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public HttpServer ()
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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="HttpServer"/> class with
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/// the specified <paramref name="port"/>.
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/// </summary>
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/// <remarks>
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/// <para>
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/// An instance initialized by this constructor listens for the incoming
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/// requests on <paramref name="port"/>.
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/// </para>
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/// <para>
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/// And if <paramref name="port"/> is 443, that instance provides a secure
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/// connection.
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/// </para>
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/// </remarks>
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/// <param name="port">
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/// An <see cref="int"/> that represents the port number to listen.
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/// </param>
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/// <exception cref="ArgumentOutOfRangeException">
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/// <paramref name="port"/> is not between 1 and 65535.
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/// </exception>
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public HttpServer (int port)
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: this (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="HttpServer"/> class with
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/// the specified <paramref name="port"/> and <paramref name="secure"/>.
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/// </summary>
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/// <remarks>
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/// An instance initialized by this constructor listens for the incoming
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/// requests on <paramref name="port"/>.
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/// </remarks>
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/// <param name="port">
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/// An <see cref="int"/> that represents the port number to listen.
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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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/// <exception cref="ArgumentOutOfRangeException">
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/// <paramref name="port"/> is not between 1 and 65535.
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/// </exception>
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/// <exception cref="ArgumentException">
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/// Pair of <paramref name="port"/> and <paramref name="secure"/> is invalid.
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/// </exception>
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public HttpServer (int port, bool secure)
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{
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if (!port.IsPortNumber ())
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throw new ArgumentOutOfRangeException (
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"port", "Must be between 1 and 65535: " + port);
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if ((port == 80 && secure) || (port == 443 && !secure))
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throw new ArgumentException (
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String.Format (
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"Invalid pair of 'port' and 'secure': {0}, {1}", port, secure));
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_port = port;
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_secure = secure;
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_listener = new HttpListener ();
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_logger = new Logger ();
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_serviceHosts = new WebSocketServiceHostManager (_logger);
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_state = ServerState.READY;
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_sync = new object ();
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var os = Environment.OSVersion;
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if (os.Platform != PlatformID.Unix && os.Platform != PlatformID.MacOSX)
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_windows = true;
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var prefix = String.Format ("http{0}://*:{1}/", _secure ? "s" : "", _port);
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_listener.Prefixes.Add (prefix);
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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 or sets the scheme used to authenticate the clients.
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/// </summary>
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/// <value>
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/// One of the <see cref="WebSocketSharp.Net.AuthenticationSchemes"/> enum
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/// values, indicates the scheme used to authenticate the clients. The default
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/// value is <see cref="WebSocketSharp.Net.AuthenticationSchemes.Anonymous"/>.
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/// </value>
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public AuthenticationSchemes AuthenticationSchemes {
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get {
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return _listener.AuthenticationSchemes;
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}
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set {
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if (!canSet ("AuthenticationSchemes"))
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return;
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_listener.AuthenticationSchemes = value;
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}
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}
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/// <summary>
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/// Gets or sets the certificate used to authenticate the server on the
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/// secure connection.
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/// </summary>
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/// <value>
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/// A <see cref="X509Certificate2"/> used to authenticate the server.
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/// </value>
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public X509Certificate2 Certificate {
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get {
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return _listener.DefaultCertificate;
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}
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set {
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if (!canSet ("Certificate"))
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return;
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if (EndPointListener.CertificateExists (_port, _listener.CertificateFolderPath))
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_logger.Warn (
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"The server certificate associated with the port number already exists.");
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_listener.DefaultCertificate = value;
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}
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}
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/// <summary>
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/// Gets a value indicating whether the server has been started.
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/// </summary>
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/// <value>
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/// <c>true</c> if the server has been started; otherwise, <c>false</c>.
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/// </value>
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public bool IsListening {
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get {
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return _state == ServerState.START;
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}
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}
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/// <summary>
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/// Gets a value indicating whether the server provides secure connection.
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/// </summary>
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/// <value>
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/// <c>true</c> if the server provides secure connection; otherwise,
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/// <c>false</c>.
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/// </value>
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public bool IsSecure {
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get {
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return _secure;
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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
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/// WebSocket sessions 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 sessions every
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/// 60 seconds; 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 logging functions.
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/// </summary>
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/// <remarks>
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/// The default logging level is <see cref="LogLevel.ERROR"/>. If you would
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/// like to change it, you should set the <c>Log.Level</c> property to any of
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/// the <see cref="LogLevel"/> enum values.
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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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public Logger Log {
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get {
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return _logger;
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}
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}
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/// <summary>
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/// Gets the port on which to listen for incoming requests.
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/// </summary>
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/// <value>
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/// An <see cref="int"/> that represents the port number to listen.
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/// </value>
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public int Port {
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get {
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return _port;
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}
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}
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/// <summary>
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/// Gets or sets the name of the realm associated with the
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/// <see cref="HttpServer"/>.
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/// </summary>
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/// <value>
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/// A <see cref="string"/> that represents the name of the realm.
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/// The default value is <c>SECRET AREA</c>.
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/// </value>
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public string Realm {
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get {
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return _listener.Realm;
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}
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set {
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if (!canSet ("Realm"))
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return;
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_listener.Realm = value;
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}
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}
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/// <summary>
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/// Gets or sets the document root path of server.
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/// </summary>
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/// <value>
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/// A <see cref="string"/> that represents the document root path of server.
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/// The default value is <c>./Public</c>.
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/// </value>
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public string RootPath {
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get {
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return _rootPath.IsNullOrEmpty ()
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? (_rootPath = "./Public")
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: _rootPath;
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}
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set {
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if (!canSet ("RootPath"))
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return;
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_rootPath = value;
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}
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}
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/// <summary>
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/// Gets or sets the delegate called to find the credentials for an identity
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/// used to authenticate a client.
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/// </summary>
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/// <value>
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/// A Func<<see cref="IIdentity"/>, <see cref="NetworkCredential"/>>
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/// delegate that references the method(s) used to find the credentials.
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/// The default value is a function that only returns <see langword="null"/>.
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/// </value>
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public Func<IIdentity, NetworkCredential> UserCredentialsFinder {
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get {
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return _listener.UserCredentialsFinder;
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}
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set {
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if (!canSet ("UserCredentialsFinder"))
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return;
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_listener.UserCredentialsFinder = value;
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}
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}
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/// <summary>
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/// Gets the access to the WebSocket services provided by the
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/// <see cref="HttpServer"/>.
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/// </summary>
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/// <value>
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/// A <see cref="WebSocketServiceHostManager"/> that manages the WebSocket
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/// services.
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/// </value>
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public WebSocketServiceHostManager WebSocketServices {
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get {
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return _serviceHosts;
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}
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}
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#endregion
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#region Public Events
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/// <summary>
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/// Occurs when the server receives an HTTP CONNECT request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnConnect;
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/// <summary>
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/// Occurs when the server receives an HTTP DELETE request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnDelete;
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/// <summary>
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/// Occurs when the server receives an HTTP GET request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnGet;
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/// <summary>
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/// Occurs when the server receives an HTTP HEAD request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnHead;
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/// <summary>
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/// Occurs when the server receives an HTTP OPTIONS request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnOptions;
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/// <summary>
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/// Occurs when the server receives an HTTP PATCH request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnPatch;
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/// <summary>
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/// Occurs when the server receives an HTTP POST request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnPost;
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/// <summary>
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/// Occurs when the server receives an HTTP PUT request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnPut;
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/// <summary>
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/// Occurs when the server receives an HTTP TRACE request.
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/// </summary>
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public event EventHandler<HttpRequestEventArgs> OnTrace;
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#endregion
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#region Private Methods
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private void abort ()
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{
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lock (_sync) {
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if (!IsListening)
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return;
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_state = ServerState.SHUTDOWN;
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}
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_serviceHosts.Stop (
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((ushort) CloseStatusCode.SERVER_ERROR).ToByteArrayInternally (ByteOrder.BIG),
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true);
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_listener.Abort ();
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_state = ServerState.STOP;
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}
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private void acceptHttpRequest (HttpListenerContext context)
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{
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var args = new HttpRequestEventArgs (context);
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var method = context.Request.HttpMethod;
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if (method == "GET" && OnGet != null) {
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OnGet (this, args);
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return;
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}
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if (method == "HEAD" && OnHead != null) {
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OnHead (this, args);
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return;
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}
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if (method == "POST" && OnPost != null) {
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OnPost (this, args);
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return;
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}
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if (method == "PUT" && OnPut != null) {
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OnPut (this, args);
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return;
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}
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if (method == "DELETE" && OnDelete != null) {
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OnDelete (this, args);
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return;
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}
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if (method == "OPTIONS" && OnOptions != null) {
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OnOptions (this, args);
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return;
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}
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if (method == "TRACE" && OnTrace != null) {
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OnTrace (this, args);
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return;
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}
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if (method == "CONNECT" && OnConnect != null) {
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OnConnect (this, args);
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return;
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}
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if (method == "PATCH" && OnPatch != null) {
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OnPatch (this, args);
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return;
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}
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context.Response.Close (HttpStatusCode.NotImplemented);
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}
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private void acceptRequestAsync (HttpListenerContext context)
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{
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ThreadPool.QueueUserWorkItem (
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state => {
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try {
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var authScheme = _listener.SelectAuthenticationScheme (context);
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if (authScheme != AuthenticationSchemes.Anonymous &&
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!authenticateRequest (authScheme, context))
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return;
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if (context.Request.IsUpgradeTo ("websocket")) {
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acceptWebSocketRequest (context.AcceptWebSocket (_logger));
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return;
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}
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acceptHttpRequest (context);
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context.Response.Close ();
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}
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catch (Exception ex) {
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_logger.Fatal (ex.ToString ());
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context.Connection.Close (true);
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}
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});
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}
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private void acceptWebSocketRequest (HttpListenerWebSocketContext context)
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{
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var path = context.Path;
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WebSocketServiceHost host;
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if (path == null ||
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!_serviceHosts.TryGetServiceHostInternally (path, out host)) {
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context.Close (HttpStatusCode.NotImplemented);
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return;
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}
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host.StartSession (context);
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}
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private bool authenticateRequest (
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AuthenticationSchemes scheme, HttpListenerContext context)
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{
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if (context.Request.IsAuthenticated)
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return true;
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if (scheme == AuthenticationSchemes.Basic)
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context.Response.CloseWithAuthChallenge (
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HttpUtility.CreateBasicAuthChallenge (_listener.Realm));
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else if (scheme == AuthenticationSchemes.Digest)
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context.Response.CloseWithAuthChallenge (
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HttpUtility.CreateDigestAuthChallenge (_listener.Realm));
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else
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context.Response.Close (HttpStatusCode.Forbidden);
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return false;
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}
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|
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private bool canSet (string property)
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{
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if (_state == ServerState.START || _state == ServerState.SHUTDOWN) {
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_logger.Error (
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String.Format (
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"The '{0}' property cannot set a value because the server has already been started.",
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property));
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return false;
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}
|
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return true;
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}
|
|
|
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private string checkIfCertExists ()
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{
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return _secure &&
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!EndPointListener.CertificateExists (_port, _listener.CertificateFolderPath) &&
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Certificate == null
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? "The secure connection requires a server certificate."
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: null;
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}
|
|
|
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private void receiveRequest ()
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{
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while (true) {
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try {
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acceptRequestAsync (_listener.GetContext ());
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}
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catch (HttpListenerException ex) {
|
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_logger.Warn (
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String.Format (
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"Receiving has been stopped.\nreason: {0}.", ex.Message));
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break;
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}
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catch (Exception ex) {
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_logger.Fatal (ex.ToString ());
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break;
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}
|
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}
|
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|
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if (IsListening)
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abort ();
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}
|
|
|
|
private void startReceiving ()
|
|
{
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_receiveRequestThread = new Thread (new ThreadStart (receiveRequest));
|
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_receiveRequestThread.IsBackground = true;
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_receiveRequestThread.Start ();
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}
|
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|
|
private void stopListener (int timeOut)
|
|
{
|
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_listener.Close ();
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_receiveRequestThread.Join (timeOut);
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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
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/// <paramref name="servicePath"/>.
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/// </summary>
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/// <remarks>
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/// This method converts <paramref name="servicePath"/> to URL-decoded string
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/// and removes <c>'/'</c> from tail end of <paramref name="servicePath"/>.
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/// </remarks>
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/// <param name="servicePath">
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/// A <see cref="string"/> that represents the absolute path to the WebSocket
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/// service.
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/// </param>
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/// <typeparam name="TWithNew">
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/// The type of the WebSocket service. The TWithNew must inherit the
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/// <see cref="WebSocketService"/> class and must have a public parameterless
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/// constructor.
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/// </typeparam>
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public void AddWebSocketService<TWithNew> (string servicePath)
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where TWithNew : WebSocketService, new ()
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{
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AddWebSocketService<TWithNew> (servicePath, () => new TWithNew ());
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}
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/// <summary>
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/// Adds the specified typed WebSocket service with the specified
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/// <paramref name="servicePath"/> and <paramref name="serviceConstructor"/>.
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/// </summary>
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/// <remarks>
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/// <para>
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/// This method converts <paramref name="servicePath"/> to URL-decoded
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/// string and removes <c>'/'</c> from tail end of
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/// <paramref name="servicePath"/>.
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/// </para>
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/// <para>
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/// <paramref name="serviceConstructor"/> returns a initialized specified
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/// typed WebSocket service instance.
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/// </para>
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/// </remarks>
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/// <param name="servicePath">
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/// A <see cref="string"/> that represents the absolute path to the WebSocket
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/// service.
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/// </param>
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/// <param name="serviceConstructor">
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/// A Func<T> delegate that references the method used to initialize
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/// a new WebSocket service instance (a new WebSocket session).
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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
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/// <see cref="WebSocketService"/> class.
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/// </typeparam>
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public void AddWebSocketService<T> (
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string servicePath, Func<T> serviceConstructor)
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where T : WebSocketService
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{
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var msg = servicePath.CheckIfValidServicePath () ??
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(serviceConstructor == null
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? "'serviceConstructor' must not be null."
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: null);
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if (msg != null) {
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_logger.Error (
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String.Format ("{0}\nservice path: {1}", msg, servicePath ?? ""));
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return;
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}
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var host = new WebSocketServiceHost<T> (
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servicePath, serviceConstructor, _logger);
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if (!KeepClean)
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host.KeepClean = false;
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_serviceHosts.Add (host.ServicePath, host);
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}
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/// <summary>
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/// Gets the contents of the file with the specified <paramref name="path"/>.
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/// </summary>
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/// <returns>
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/// An array of <see cref="byte"/> that receives the contents of the file if
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/// it exists; otherwise, <see langword="null"/>.
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/// </returns>
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/// <param name="path">
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/// A <see cref="string"/> that represents the virtual path to the file
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/// to get.
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/// </param>
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public byte [] GetFile (string path)
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{
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var filePath = RootPath + path;
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if (_windows)
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filePath = filePath.Replace ("/", "\\");
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return File.Exists (filePath)
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? File.ReadAllBytes (filePath)
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: null;
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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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/// <remarks>
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/// This method converts <paramref name="servicePath"/> to URL-decoded string
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/// and removes <c>'/'</c> from tail end of <paramref name="servicePath"/>.
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/// </remarks>
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/// <returns>
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/// <c>true</c> if the WebSocket service is successfully found and removed;
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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 represents the absolute path to the WebSocket
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/// 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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var msg = servicePath.CheckIfValidServicePath ();
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if (msg != null) {
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_logger.Error (
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String.Format ("{0}\nservice path: {1}", msg, servicePath));
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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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/// Starts receiving the HTTP requests.
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/// </summary>
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public void Start ()
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{
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lock (_sync) {
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var msg = _state.CheckIfStartable () ?? checkIfCertExists ();
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if (msg != null) {
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_logger.Error (
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String.Format (
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"{0}\nstate: {1}\nsecure: {2}", msg, _state, _secure));
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return;
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}
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_serviceHosts.Start ();
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_listener.Start ();
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startReceiving ();
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_state = ServerState.START;
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}
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}
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/// <summary>
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/// Stops receiving the HTTP requests.
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/// </summary>
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public void Stop ()
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{
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lock (_sync) {
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var msg = _state.CheckIfStart ();
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if (msg != null) {
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_logger.Error (String.Format ("{0}\nstate: {1}", msg, _state));
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return;
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}
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_state = ServerState.SHUTDOWN;
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}
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_serviceHosts.Stop (new byte [0], true);
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stopListener (5000);
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_state = ServerState.STOP;
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}
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/// <summary>
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/// Stops receiving the HTTP requests with the specified <see cref="ushort"/>
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/// and <see cref="string"/> used to stop the WebSocket services.
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/// </summary>
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/// <param name="code">
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/// A <see cref="ushort"/> that represents the status code indicating the
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/// reason for stop.
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/// </param>
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/// <param name="reason">
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/// A <see cref="string"/> that represents 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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byte [] data = null;
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lock (_sync) {
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var msg = _state.CheckIfStart () ??
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code.CheckIfValidCloseStatusCode () ??
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(data = code.Append (reason)).CheckIfValidControlData ("reason");
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if (msg != null) {
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_logger.Error (
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String.Format (
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"{0}\nstate: {1}\ncode: {2}\nreason: {3}", msg, _state, code, reason));
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return;
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}
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_state = ServerState.SHUTDOWN;
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}
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_serviceHosts.Stop (data, !code.IsReserved ());
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stopListener (5000);
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_state = ServerState.STOP;
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}
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/// <summary>
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/// Stops receiving the HTTP requests with the specified <see cref="CloseStatusCode"/>
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/// and <see cref="string"/> used to stop the WebSocket services.
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/// </summary>
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/// <param name="code">
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/// One of the <see cref="CloseStatusCode"/> enum values, represents the
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/// status code indicating the reasons for stop.
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/// </param>
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/// <param name="reason">
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/// A <see cref="string"/> that represents 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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byte [] data = null;
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lock (_sync) {
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var msg = _state.CheckIfStart () ??
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(data = ((ushort) code).Append (reason)).CheckIfValidControlData ("reason");
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if (msg != null) {
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_logger.Error (
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String.Format ("{0}\nstate: {1}\nreason: {2}", msg, _state, reason));
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return;
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}
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_state = ServerState.SHUTDOWN;
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}
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_serviceHosts.Stop (data, !code.IsReserved ());
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stopListener (5000);
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_state = ServerState.STOP;
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}
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#endregion
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}
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}
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