752 lines
22 KiB
C#
752 lines
22 KiB
C#
#region License
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/*
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* HttpListener.cs
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*
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* This code is derived from System.Net.HttpListener.cs of Mono
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* (http://www.mono-project.com).
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*
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* The MIT License
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*
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* Copyright (c) 2005 Novell, Inc. (http://www.novell.com)
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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 Authors
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/*
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* Authors:
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* - Gonzalo Paniagua Javier <gonzalo@novell.com>
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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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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// TODO: Logging.
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namespace WebSocketSharp.Net
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{
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/// <summary>
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/// Provides a simple, programmatically controlled HTTP listener.
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/// </summary>
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public sealed class HttpListener : IDisposable
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{
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#region Private Fields
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private AuthenticationSchemes _authSchemes;
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private Func<HttpListenerRequest, AuthenticationSchemes> _authSchemeSelector;
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private string _certFolderPath;
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private Dictionary<HttpConnection, HttpConnection> _connections;
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private object _connectionsSync;
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private List<HttpListenerContext> _ctxQueue;
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private object _ctxQueueSync;
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private Dictionary<HttpListenerContext, HttpListenerContext> _ctxRegistry;
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private object _ctxRegistrySync;
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private Func<IIdentity, NetworkCredential> _credFinder;
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private X509Certificate2 _defaultCert;
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private bool _disposed;
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private bool _ignoreWriteExceptions;
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private bool _listening;
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private HttpListenerPrefixCollection _prefixes;
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private string _realm;
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private List<ListenerAsyncResult> _waitQueue;
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private object _waitQueueSync;
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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="HttpListener"/> class.
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/// </summary>
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public HttpListener ()
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{
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_authSchemes = AuthenticationSchemes.Anonymous;
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_connections = new Dictionary<HttpConnection, HttpConnection> ();
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_connectionsSync = ((ICollection) _connections).SyncRoot;
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_ctxQueue = new List<HttpListenerContext> ();
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_ctxQueueSync = ((ICollection) _ctxQueue).SyncRoot;
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_ctxRegistry = new Dictionary<HttpListenerContext, HttpListenerContext> ();
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_ctxRegistrySync = ((ICollection) _ctxRegistry).SyncRoot;
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_prefixes = new HttpListenerPrefixCollection (this);
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_waitQueue = new List<ListenerAsyncResult> ();
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_waitQueueSync = ((ICollection) _waitQueue).SyncRoot;
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}
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#endregion
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#region Internal Properties
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internal bool IsDisposed {
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get {
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return _disposed;
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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 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 values,
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/// represents the scheme used to authenticate the clients. The default value is
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/// <see cref="WebSocketSharp.Net.AuthenticationSchemes.Anonymous"/>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public AuthenticationSchemes AuthenticationSchemes {
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get {
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CheckDisposed ();
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return _authSchemes;
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}
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set {
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CheckDisposed ();
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_authSchemes = 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 select the scheme used to authenticate the clients.
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/// </summary>
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/// <remarks>
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/// If you set this property, the listener uses the authentication scheme selected by
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/// the delegate for each request. Or if you don't set, the listener uses the value of
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/// the <see cref="HttpListener.AuthenticationSchemes"/> property as the authentication
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/// scheme for all requests.
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/// </remarks>
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/// <value>
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/// A <c>Func<<see cref="HttpListenerRequest"/>, <see cref="AuthenticationSchemes"/>></c>
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/// delegate that references the method used to select an authentication scheme. The default
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/// value is <see langword="null"/>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public Func<HttpListenerRequest, AuthenticationSchemes> AuthenticationSchemeSelector {
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get {
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CheckDisposed ();
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return _authSchemeSelector;
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}
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set {
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CheckDisposed ();
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_authSchemeSelector = value;
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}
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}
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/// <summary>
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/// Gets or sets the path to the folder in which stores the certificate files used to
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/// authenticate the server on the secure connection.
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/// </summary>
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/// <remarks>
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/// <para>
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/// This property represents the path to the folder in which stores the certificate files
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/// associated with each port number of added URI prefixes. A set of the certificate files
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/// is a pair of the <c>'port number'.cer</c> (DER) and <c>'port number'.key</c>
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/// (DER, RSA Private Key).
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/// </para>
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/// <para>
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/// If this property is <see langword="null"/> or empty, the result of
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/// <c>System.Environment.GetFolderPath
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/// (<see cref="Environment.SpecialFolder.ApplicationData"/>)</c> is used as the default path.
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/// </para>
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/// </remarks>
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/// <value>
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/// A <see cref="string"/> that represents the path to the folder in which stores
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/// the certificate files. The default value is <see langword="null"/>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public string CertificateFolderPath {
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get {
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CheckDisposed ();
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return _certFolderPath;
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}
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set {
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CheckDisposed ();
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_certFolderPath = value;
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}
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}
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/// <summary>
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/// Gets or sets the default certificate used to authenticate the server on the secure
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/// connection.
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/// </summary>
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/// <value>
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/// A <see cref="X509Certificate2"/> used to authenticate the server if the certificate
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/// files aren't found in the <see cref="CertificateFolderPath"/>. The default value is
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/// <see langword="null"/>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public X509Certificate2 DefaultCertificate {
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get {
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CheckDisposed ();
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return _defaultCert;
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}
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set {
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CheckDisposed ();
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_defaultCert = value;
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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 listener returns exceptions that occur when
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/// sending the response to the client.
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/// </summary>
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/// <value>
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/// <c>true</c> if the listener shouldn't return those exceptions; otherwise, <c>false</c>.
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/// The default value is <c>false</c>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public bool IgnoreWriteExceptions {
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get {
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CheckDisposed ();
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return _ignoreWriteExceptions;
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}
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set {
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CheckDisposed ();
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_ignoreWriteExceptions = value;
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}
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}
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/// <summary>
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/// Gets a value indicating whether the listener has been started.
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/// </summary>
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/// <value>
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/// <c>true</c> if the listener 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 _listening;
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}
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}
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/// <summary>
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/// Gets a value indicating whether the listener can be used with the current operating system.
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/// </summary>
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/// <value>
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/// <c>true</c>.
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/// </value>
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public static bool IsSupported {
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get {
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return true;
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}
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}
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/// <summary>
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/// Gets the URI prefixes handled by the listener.
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/// </summary>
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/// <value>
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/// A <see cref="HttpListenerPrefixCollection"/> that contains the URI prefixes.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public HttpListenerPrefixCollection Prefixes {
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get {
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CheckDisposed ();
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return _prefixes;
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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 listener.
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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. The default value is
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/// <c>"SECRET AREA"</c>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public string Realm {
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get {
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CheckDisposed ();
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return _realm != null && _realm.Length > 0
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? _realm
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: (_realm = "SECRET AREA");
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}
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set {
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CheckDisposed ();
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_realm = value;
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether, when NTLM authentication is used,
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/// the authentication information of first request is used to authenticate
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/// additional requests on the same connection.
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/// </summary>
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/// <remarks>
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/// This property isn't currently supported and always throws
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/// a <see cref="NotSupportedException"/>.
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/// </remarks>
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/// <value>
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/// <c>true</c> if the authentication information of first request is used;
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/// otherwise, <c>false</c>.
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/// </value>
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/// <exception cref="NotSupportedException">
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/// Any use of this property.
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/// </exception>
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public bool UnsafeConnectionNtlmAuthentication {
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get {
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throw new NotSupportedException ();
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}
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set {
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throw new NotSupportedException ();
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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 used to
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/// authenticate a client.
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/// </summary>
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/// <value>
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/// A <c>Func<<see cref="IIdentity"/>, <see cref="NetworkCredential"/>></c> delegate
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/// that references the method used to find the credentials. The default value is a function
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/// that only returns <see langword="null"/>.
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/// </value>
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/// <exception cref="ObjectDisposedException">
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/// This listener has been closed.
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/// </exception>
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public Func<IIdentity, NetworkCredential> UserCredentialsFinder {
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get {
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CheckDisposed ();
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return _credFinder ?? (_credFinder = id => null);
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}
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set {
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CheckDisposed ();
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_credFinder = value;
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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 cleanup (bool force)
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{
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lock (_ctxRegistrySync) {
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if (!force)
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sendServiceUnavailable ();
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cleanupContextRegistry ();
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cleanupConnections ();
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cleanupWaitQueue ();
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}
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}
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private void cleanupConnections ()
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{
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lock (_connectionsSync) {
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if (_connections.Count == 0)
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return;
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// Need to copy this since closing will call RemoveConnection.
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var keys = _connections.Keys;
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var conns = new HttpConnection[keys.Count];
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keys.CopyTo (conns, 0);
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_connections.Clear ();
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for (var i = conns.Length - 1; i >= 0; i--)
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conns[i].Close (true);
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}
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}
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private void cleanupContextRegistry ()
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{
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lock (_ctxRegistrySync) {
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if (_ctxRegistry.Count == 0)
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return;
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// Need to copy this since closing will call UnregisterContext.
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var keys = _ctxRegistry.Keys;
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var ctxs = new HttpListenerContext[keys.Count];
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keys.CopyTo (ctxs, 0);
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_ctxRegistry.Clear ();
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for (var i = ctxs.Length - 1; i >= 0; i--)
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ctxs[i].Connection.Close (true);
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}
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}
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private void cleanupWaitQueue ()
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{
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lock (_waitQueueSync) {
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if (_waitQueue.Count == 0)
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return;
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var ex = new ObjectDisposedException (GetType ().ToString ());
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foreach (var ares in _waitQueue)
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ares.Complete (ex);
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_waitQueue.Clear ();
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}
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}
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private void close (bool force)
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{
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EndPointManager.RemoveListener (this);
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cleanup (force);
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}
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// Must be called with a lock on _ctxQueue.
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private HttpListenerContext getContextFromQueue ()
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{
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if (_ctxQueue.Count == 0)
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return null;
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var ctx = _ctxQueue[0];
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_ctxQueue.RemoveAt (0);
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return ctx;
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}
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private void sendServiceUnavailable ()
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{
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lock (_ctxQueueSync) {
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if (_ctxQueue.Count == 0)
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return;
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var ctxs = _ctxQueue.ToArray ();
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_ctxQueue.Clear ();
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foreach (var ctx in ctxs) {
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var res = ctx.Response;
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res.StatusCode = (int) HttpStatusCode.ServiceUnavailable;
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res.Close ();
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}
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}
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}
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#endregion
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#region Internal Methods
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internal void AddConnection (HttpConnection connection)
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{
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lock (_connectionsSync)
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_connections[connection] = connection;
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}
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internal ListenerAsyncResult BeginGetContext (ListenerAsyncResult asyncResult)
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{
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CheckDisposed ();
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if (_prefixes.Count == 0)
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throw new InvalidOperationException ("The listener has no URI prefix on which listens.");
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if (!_listening)
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throw new InvalidOperationException ("The listener hasn't been started.");
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// Lock _waitQueue early to avoid race conditions.
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lock (_waitQueueSync) {
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lock (_ctxQueueSync) {
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var ctx = getContextFromQueue ();
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if (ctx != null) {
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asyncResult.Complete (ctx, true);
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return asyncResult;
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}
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}
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_waitQueue.Add (asyncResult);
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}
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return asyncResult;
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}
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internal void CheckDisposed ()
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{
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if (_disposed)
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throw new ObjectDisposedException (GetType ().ToString ());
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}
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internal void RegisterContext (HttpListenerContext context)
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{
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lock (_ctxRegistrySync)
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_ctxRegistry[context] = context;
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ListenerAsyncResult ares = null;
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lock (_waitQueueSync) {
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if (_waitQueue.Count == 0) {
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lock (_ctxQueueSync)
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_ctxQueue.Add (context);
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}
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else {
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ares = _waitQueue[0];
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_waitQueue.RemoveAt (0);
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}
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}
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if (ares != null)
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ares.Complete (context);
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}
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internal void RemoveConnection (HttpConnection connection)
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{
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lock (_connectionsSync)
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_connections.Remove (connection);
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}
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internal AuthenticationSchemes SelectAuthenticationScheme (HttpListenerContext context)
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{
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return AuthenticationSchemeSelector != null
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? AuthenticationSchemeSelector (context.Request)
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: _authSchemes;
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}
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internal void UnregisterContext (HttpListenerContext context)
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{
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lock (_ctxRegistrySync)
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_ctxRegistry.Remove (context);
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lock (_ctxQueueSync) {
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var i = _ctxQueue.IndexOf (context);
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if (i >= 0)
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_ctxQueue.RemoveAt (i);
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}
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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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/// Shuts down the listener immediately.
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/// </summary>
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public void Abort ()
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{
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if (_disposed)
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return;
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close (true);
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_disposed = true;
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}
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/// <summary>
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/// Begins getting an incoming request asynchronously.
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/// </summary>
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/// <remarks>
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/// This asynchronous operation must be completed by calling the <c>EndGetContext</c> method.
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/// Typically, the method is invoked by the <paramref name="callback"/> delegate.
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/// </remarks>
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/// <returns>
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/// An <see cref="IAsyncResult"/> that represents the status of the asynchronous operation.
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/// </returns>
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/// <param name="callback">
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/// An <see cref="AsyncCallback"/> delegate that references the method to invoke
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/// when the asynchronous operation completes.
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/// </param>
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/// <param name="state">
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/// An <see cref="object"/> that represents a user defined object to pass to
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/// the <paramref name="callback"/> delegate.
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/// </param>
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/// <exception cref="InvalidOperationException">
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/// <para>
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/// This listener has no URI prefix on which listens.
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/// </para>
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/// <para>
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/// -or-
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/// </para>
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/// <para>
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/// This listener hasn't been started, or is currently stopped.
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/// </para>
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/// </exception>
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/// <exception cref="ObjectDisposedException">
|
|
/// This listener has been closed.
|
|
/// </exception>
|
|
public IAsyncResult BeginGetContext (AsyncCallback callback, Object state)
|
|
{
|
|
return BeginGetContext (new ListenerAsyncResult (callback, state));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Shuts down the listener.
|
|
/// </summary>
|
|
public void Close ()
|
|
{
|
|
if (_disposed)
|
|
return;
|
|
|
|
close (false);
|
|
_disposed = true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Ends an asynchronous operation to get an incoming request.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This method completes an asynchronous operation started by calling
|
|
/// the <c>BeginGetContext</c> method.
|
|
/// </remarks>
|
|
/// <returns>
|
|
/// A <see cref="HttpListenerContext"/> that represents a request.
|
|
/// </returns>
|
|
/// <param name="asyncResult">
|
|
/// An <see cref="IAsyncResult"/> obtained by calling the <c>BeginGetContext</c> method.
|
|
/// </param>
|
|
/// <exception cref="ArgumentNullException">
|
|
/// <paramref name="asyncResult"/> is <see langword="null"/>.
|
|
/// </exception>
|
|
/// <exception cref="ArgumentException">
|
|
/// <paramref name="asyncResult"/> wasn't obtained by calling the <c>BeginGetContext</c> method.
|
|
/// </exception>
|
|
/// <exception cref="InvalidOperationException">
|
|
/// This method was already called for the specified <paramref name="asyncResult"/>.
|
|
/// </exception>
|
|
/// <exception cref="ObjectDisposedException">
|
|
/// This listener has been closed.
|
|
/// </exception>
|
|
public HttpListenerContext EndGetContext (IAsyncResult asyncResult)
|
|
{
|
|
CheckDisposed ();
|
|
if (asyncResult == null)
|
|
throw new ArgumentNullException ("asyncResult");
|
|
|
|
var ares = asyncResult as ListenerAsyncResult;
|
|
if (ares == null)
|
|
throw new ArgumentException ("A wrong IAsyncResult.", "asyncResult");
|
|
|
|
if (ares.EndCalled)
|
|
throw new InvalidOperationException ("This IAsyncResult cannot be reused.");
|
|
|
|
ares.EndCalled = true;
|
|
if (!ares.IsCompleted)
|
|
ares.AsyncWaitHandle.WaitOne ();
|
|
|
|
lock (_waitQueueSync) {
|
|
var i = _waitQueue.IndexOf (ares);
|
|
if (i >= 0)
|
|
_waitQueue.RemoveAt (i);
|
|
}
|
|
|
|
var ctx = ares.GetContext ();
|
|
var schm = SelectAuthenticationScheme (ctx);
|
|
if (schm != AuthenticationSchemes.Anonymous)
|
|
ctx.SetUser (schm, Realm, UserCredentialsFinder);
|
|
|
|
return ctx; // This will throw on error.
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets an incoming request.
|
|
/// </summary>
|
|
/// <remarks>
|
|
/// This method waits for an incoming request, and returns when a request is received.
|
|
/// </remarks>
|
|
/// <returns>
|
|
/// A <see cref="HttpListenerContext"/> that represents a request.
|
|
/// </returns>
|
|
/// <exception cref="InvalidOperationException">
|
|
/// <para>
|
|
/// This listener has no URI prefix on which listens.
|
|
/// </para>
|
|
/// <para>
|
|
/// -or-
|
|
/// </para>
|
|
/// <para>
|
|
/// This listener hasn't been started, or is currently stopped.
|
|
/// </para>
|
|
/// </exception>
|
|
/// <exception cref="ObjectDisposedException">
|
|
/// This listener has been closed.
|
|
/// </exception>
|
|
public HttpListenerContext GetContext ()
|
|
{
|
|
var ares = BeginGetContext (new ListenerAsyncResult (null, null));
|
|
ares.InGet = true;
|
|
|
|
return EndGetContext (ares);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Starts receiving incoming requests.
|
|
/// </summary>
|
|
/// <exception cref="ObjectDisposedException">
|
|
/// This listener has been closed.
|
|
/// </exception>
|
|
public void Start ()
|
|
{
|
|
CheckDisposed ();
|
|
if (_listening)
|
|
return;
|
|
|
|
EndPointManager.AddListener (this);
|
|
_listening = true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops receiving incoming requests.
|
|
/// </summary>
|
|
/// <exception cref="ObjectDisposedException">
|
|
/// This listener has been closed.
|
|
/// </exception>
|
|
public void Stop ()
|
|
{
|
|
CheckDisposed ();
|
|
if (!_listening)
|
|
return;
|
|
|
|
_listening = false;
|
|
EndPointManager.RemoveListener (this);
|
|
sendServiceUnavailable ();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Explicit Interface Implementations
|
|
|
|
/// <summary>
|
|
/// Releases all resources used by the listener.
|
|
/// </summary>
|
|
void IDisposable.Dispose ()
|
|
{
|
|
if (_disposed)
|
|
return;
|
|
|
|
close (true);
|
|
_disposed = true;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|