677 lines
20 KiB
C#
677 lines
20 KiB
C#
//
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// System.Web.HttpRuntime.cs
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//
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// Authors:
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// Miguel de Icaza (miguel@novell.com)
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// Marek Habersack <mhabersack@novell.com>
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//
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//
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// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in 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,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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//
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// TODO: Call HttpRequest.CloseInputStream when we finish a request, as we are using the IntPtr stream.
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//
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using System.IO;
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using System.Text;
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using System.Globalization;
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using System.Collections;
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using System.Collections.Concurrent;
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using System.Reflection;
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using System.Security;
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using System.Security.Permissions;
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using System.Web.Caching;
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using System.Web.Configuration;
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using System.Web.Management;
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using System.Web.UI;
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using System.Web.Util;
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using Mono.Web.Util;
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using System.Threading;
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using System.CodeDom.Compiler;
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using System.Web.Compilation;
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namespace System.Web
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{
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// CAS - no InheritanceDemand here as the class is sealed
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[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public sealed class HttpRuntime
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{
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static bool domainUnloading;
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static SplitOrderedList <string, string> registeredAssemblies;
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static QueueManager queue_manager;
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static TraceManager trace_manager;
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static Cache cache;
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static Cache internalCache;
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static WaitCallback do_RealProcessRequest;
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static HttpWorkerRequest.EndOfSendNotification end_of_send_cb;
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static Exception initialException;
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static bool firstRun;
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static bool assemblyMappingEnabled;
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static object assemblyMappingLock = new object ();
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static object appOfflineLock = new object ();
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static HttpRuntimeSection runtime_section;
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public HttpRuntime ()
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{
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}
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static HttpRuntime ()
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{
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firstRun = true;
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try {
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WebConfigurationManager.Init ();
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SettingsMappingManager.Init ();
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runtime_section = (HttpRuntimeSection) WebConfigurationManager.GetSection ("system.web/httpRuntime");
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} catch (Exception ex) {
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initialException = ex;
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}
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// The classes in whose constructors exceptions may be thrown, should be handled the same way QueueManager
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// and TraceManager are below. The constructors themselves MUST NOT throw any exceptions - we MUST be sure
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// the objects are created here. The exceptions will be dealt with below, in RealProcessRequest.
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queue_manager = new QueueManager ();
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if (queue_manager.HasException) {
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if (initialException == null)
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initialException = queue_manager.InitialException;
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else {
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Console.Error.WriteLine ("Exception during QueueManager initialization:");
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Console.Error.WriteLine (queue_manager.InitialException);
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}
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}
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trace_manager = new TraceManager ();
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if (trace_manager.HasException) {
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if (initialException == null)
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initialException = trace_manager.InitialException;
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else {
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Console.Error.WriteLine ("Exception during TraceManager initialization:");
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Console.Error.WriteLine (trace_manager.InitialException);
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}
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}
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registeredAssemblies = new SplitOrderedList <string, string> (StringComparer.Ordinal);
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cache = new Cache ();
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internalCache = new Cache ();
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internalCache.DependencyCache = internalCache;
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do_RealProcessRequest = new WaitCallback (state => {
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try {
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RealProcessRequest (state);
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} catch {}
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});
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end_of_send_cb = new HttpWorkerRequest.EndOfSendNotification (EndOfSend);
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}
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internal static SplitOrderedList <string, string> RegisteredAssemblies {
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get { return registeredAssemblies; }
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}
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#region AppDomain handling
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internal static bool DomainUnloading {
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get { return domainUnloading; }
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}
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[MonoDocumentationNote ("Currently returns path to the application root")]
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public static string AspClientScriptPhysicalPath { get { return AppDomainAppPath; } }
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[MonoDocumentationNote ("Currently returns path to the application root")]
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public static string AspClientScriptVirtualPath { get { return AppDomainAppVirtualPath; } }
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//
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// http://radio.weblogs.com/0105476/stories/2002/07/12/executingAspxPagesWithoutAWebServer.html
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//
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public static string AppDomainAppId {
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[AspNetHostingPermission (SecurityAction.Demand, Level = AspNetHostingPermissionLevel.High)]
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get {
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//
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// This value should not change across invocations
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//
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string dirname = (string) AppDomain.CurrentDomain.GetData (".appId");
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if ((dirname != null) && (dirname.Length > 0) && SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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// Physical directory for the application
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public static string AppDomainAppPath {
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get {
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string dirname = (string) AppDomain.CurrentDomain.GetData (".appPath");
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if (SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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public static string AppDomainAppVirtualPath {
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get {
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return (string) AppDomain.CurrentDomain.GetData (".appVPath");
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}
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}
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public static string AppDomainId {
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[AspNetHostingPermission (SecurityAction.Demand, Level = AspNetHostingPermissionLevel.High)]
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get {
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return (string) AppDomain.CurrentDomain.GetData (".domainId");
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}
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}
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public static string AspInstallDirectory {
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get {
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string dirname = (string) AppDomain.CurrentDomain.GetData (".hostingInstallDir");
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if ((dirname != null) && (dirname.Length > 0) && SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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#endregion
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static string _actual_bin_directory;
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public static string BinDirectory {
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get {
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if (_actual_bin_directory == null) {
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string[] parts = AppDomain.CurrentDomain.SetupInformation.PrivateBinPath.Split (';');
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string mypath = AppDomainAppPath;
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string tmp;
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foreach (string p in parts) {
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tmp = Path.Combine (mypath, p);
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if (Directory.Exists (tmp)) {
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_actual_bin_directory = tmp;
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break;
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}
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}
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if (_actual_bin_directory == null)
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_actual_bin_directory = Path.Combine (mypath, "bin");
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if (_actual_bin_directory [_actual_bin_directory.Length - 1] != Path.DirectorySeparatorChar)
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_actual_bin_directory += Path.DirectorySeparatorChar;
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}
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if (SecurityManager.SecurityEnabled)
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, _actual_bin_directory).Demand ();
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return _actual_bin_directory;
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}
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}
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public static Cache Cache {
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get {
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return cache;
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}
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}
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internal static Cache InternalCache {
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get {
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return internalCache;
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}
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}
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public static string ClrInstallDirectory {
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get {
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string dirname = Path.GetDirectoryName (typeof (Object).Assembly.Location);
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if ((dirname != null) && (dirname.Length > 0) && SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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public static string CodegenDir {
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get {
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string dirname = AppDomain.CurrentDomain.SetupInformation.DynamicBase;
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if (SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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public static bool IsOnUNCShare {
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[AspNetHostingPermission (SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Low)]
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get {
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return RuntimeHelpers.IsUncShare;
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}
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}
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public static string MachineConfigurationDirectory {
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get {
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string dirname = Path.GetDirectoryName (ICalls.GetMachineConfigPath ());
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if ((dirname != null) && (dirname.Length > 0) && SecurityManager.SecurityEnabled) {
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new FileIOPermission (FileIOPermissionAccess.PathDiscovery, dirname).Demand ();
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}
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return dirname;
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}
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}
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internal static HttpRuntimeSection Section { get { return runtime_section; } }
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public static bool UsingIntegratedPipeline { get { return false; } }
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public static Version IISVersion {
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get {
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// Null means not hosted by IIS
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return null;
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}
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}
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public static Version TargetFramework {
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get {
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return runtime_section.TargetFramework;
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}
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}
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[SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
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public static void Close ()
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{
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// Remove all items from cache.
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}
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internal static HttpWorkerRequest QueuePendingRequest (bool started_internally)
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{
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HttpWorkerRequest next = queue_manager.GetNextRequest (null);
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if (next == null)
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return null;
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if (!started_internally) {
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next.StartedInternally = true;
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ThreadPool.QueueUserWorkItem (do_RealProcessRequest, next);
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return null;
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}
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return next;
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}
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static readonly string[] app_offline_files = {"app_offline.htm", "App_Offline.htm", "APP_OFFLINE.HTM"};
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static string app_offline_file;
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static bool AppIsOffline (HttpContext context)
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{
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if (!HttpApplicationFactory.ApplicationDisabled || app_offline_file == null)
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return false;
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HttpResponse response = context.Response;
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response.Clear ();
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response.ContentType = "text/html";
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response.ExpiresAbsolute = DateTime.UtcNow;
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response.StatusCode = 503;
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response.TransmitFile (app_offline_file, true);
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context.Request.ReleaseResources ();
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context.Response.ReleaseResources ();
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HttpContext.Current = null;
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HttpApplication.requests_total_counter.Increment ();
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return true;
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}
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static void AppOfflineFileRenamed (object sender, RenamedEventArgs args)
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{
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AppOfflineFileChanged (sender, args);
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}
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static void AppOfflineFileChanged (object sender, FileSystemEventArgs args)
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{
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lock (appOfflineLock) {
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bool offline;
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switch (args.ChangeType) {
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case WatcherChangeTypes.Created:
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case WatcherChangeTypes.Changed:
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offline = true;
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break;
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case WatcherChangeTypes.Deleted:
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offline = false;
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break;
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case WatcherChangeTypes.Renamed:
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RenamedEventArgs rargs = args as RenamedEventArgs;
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if (rargs != null &&
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String.Compare (rargs.Name, "app_offline.htm", StringComparison.OrdinalIgnoreCase) == 0)
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offline = true;
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else
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offline = false;
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break;
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default:
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offline = false;
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break;
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}
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SetOfflineMode (offline, args.FullPath);
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}
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}
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static void SetOfflineMode (bool offline, string filePath)
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{
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if (!offline) {
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app_offline_file = null;
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if (HttpApplicationFactory.ApplicationDisabled)
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HttpRuntime.UnloadAppDomain ();
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} else {
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app_offline_file = filePath;
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HttpApplicationFactory.DisableWatchers ();
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HttpApplicationFactory.ApplicationDisabled = true;
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InternalCache.InvokePrivateCallbacks ();
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HttpApplicationFactory.Dispose ();
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}
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}
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static void SetupOfflineWatch ()
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{
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lock (appOfflineLock) {
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FileSystemEventHandler seh = new FileSystemEventHandler (AppOfflineFileChanged);
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RenamedEventHandler reh = new RenamedEventHandler (AppOfflineFileRenamed);
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string app_dir = AppDomainAppPath;
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FileSystemWatcher watcher;
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string offlineFile = null, tmp;
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foreach (string f in app_offline_files) {
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watcher = new FileSystemWatcher ();
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watcher.Path = Path.GetDirectoryName (app_dir);
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watcher.Filter = Path.GetFileName (f);
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watcher.NotifyFilter |= NotifyFilters.Size;
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watcher.Deleted += seh;
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watcher.Changed += seh;
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watcher.Created += seh;
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watcher.Renamed += reh;
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watcher.EnableRaisingEvents = true;
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tmp = Path.Combine (app_dir, f);
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if (File.Exists (tmp))
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offlineFile = tmp;
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}
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if (offlineFile != null)
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SetOfflineMode (true, offlineFile);
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}
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}
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static void RealProcessRequest (object o)
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{
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if (domainUnloading) {
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Console.Error.WriteLine ("Domain is unloading, not processing the request.");
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return;
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}
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HttpWorkerRequest req = (HttpWorkerRequest) o;
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bool started_internally = req.StartedInternally;
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do {
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Process (req);
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req = QueuePendingRequest (started_internally);
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} while (started_internally && req != null);
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}
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static void Process (HttpWorkerRequest req)
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{
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bool error = false;
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if (firstRun) {
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firstRun = false;
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if (initialException != null) {
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FinishWithException (req, HttpException.NewWithCode ("Initial exception", initialException, WebEventCodes.RuntimeErrorRequestAbort));
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error = true;
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}
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SetupOfflineWatch ();
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}
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HttpContext context = new HttpContext (req);
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HttpContext.Current = context;
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if (AppIsOffline (context))
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return;
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//
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// Get application instance (create or reuse an instance of the correct class)
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//
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HttpApplication app = null;
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if (!error) {
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try {
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app = HttpApplicationFactory.GetApplication (context);
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} catch (Exception e) {
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FinishWithException (req, HttpException.NewWithCode (String.Empty, e, WebEventCodes.RuntimeErrorRequestAbort));
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error = true;
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}
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}
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if (error) {
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context.Request.ReleaseResources ();
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context.Response.ReleaseResources ();
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HttpContext.Current = null;
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} else {
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context.ApplicationInstance = app;
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req.SetEndOfSendNotification (end_of_send_cb, context);
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//
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// Ask application to service the request
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//
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IHttpHandler ihh = app;
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// IAsyncResult appiar = ihah.BeginProcessRequest (context, new AsyncCallback (request_processed), context);
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// ihah.EndProcessRequest (appiar);
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ihh.ProcessRequest (context);
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HttpApplicationFactory.Recycle (app);
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}
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}
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static void EndOfSend (HttpWorkerRequest ignored1, object ignored2)
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{
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}
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//
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// ProcessRequest method is executed in the AppDomain of the application
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//
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// Observations:
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// ProcessRequest does not guarantee that `wr' will be processed synchronously,
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// the request can be queued and processed later.
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//
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[AspNetHostingPermission (SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Medium)]
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public static void ProcessRequest (HttpWorkerRequest wr)
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{
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if (wr == null)
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throw new ArgumentNullException ("wr");
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//
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// Queue our request, fetch the next available one from the queue
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//
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HttpWorkerRequest request = queue_manager.GetNextRequest (wr);
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if (request == null)
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return;
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QueuePendingRequest (false);
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RealProcessRequest (request);
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}
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//
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// Called when we are shutting down or we need to reload an application
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// that has been modified (touch global.asax)
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//
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[SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
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public static void UnloadAppDomain ()
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{
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//
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// TODO: call ReleaseResources
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//
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domainUnloading = true;
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HttpApplicationFactory.DisableWatchers ();
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ThreadPool.QueueUserWorkItem (delegate {
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try {
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ShutdownAppDomain ();
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} catch (Exception e){
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Console.Error.WriteLine (e);
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}
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});
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}
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//
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// Shuts down the AppDomain
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//
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static void ShutdownAppDomain ()
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{
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queue_manager.Dispose ();
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// This will call Session_End if needed.
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InternalCache.InvokePrivateCallbacks ();
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// Kill our application.
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HttpApplicationFactory.Dispose ();
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ThreadPool.QueueUserWorkItem (delegate {
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try {
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DoUnload ();
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} catch {
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}});
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}
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static void DoUnload ()
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{
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AppDomain.Unload (AppDomain.CurrentDomain);
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}
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static string content503 = "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n" +
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"<html><head>\n<title>503 Server Unavailable</title>\n</head><body>\n" +
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"<h1>Server Unavailable</h1>\n" +
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"</body></html>\n";
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static void FinishWithException (HttpWorkerRequest wr, HttpException e)
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{
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int code = e.GetHttpCode ();
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wr.SendStatus (code, HttpWorkerRequest.GetStatusDescription (code));
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wr.SendUnknownResponseHeader ("Connection", "close");
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Encoding enc = Encoding.ASCII;
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wr.SendUnknownResponseHeader ("Content-Type", "text/html; charset=" + enc.WebName);
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|
string msg = e.GetHtmlErrorMessage ();
|
|
byte [] contentBytes = enc.GetBytes (msg);
|
|
wr.SendUnknownResponseHeader ("Content-Length", contentBytes.Length.ToString ());
|
|
wr.SendResponseFromMemory (contentBytes, contentBytes.Length);
|
|
wr.FlushResponse (true);
|
|
wr.CloseConnection ();
|
|
HttpApplication.requests_total_counter.Increment ();
|
|
}
|
|
|
|
//
|
|
// This is called from the QueueManager if a request
|
|
// can not be processed (load, no resources, or
|
|
// appdomain unload).
|
|
//
|
|
static internal void FinishUnavailable (HttpWorkerRequest wr)
|
|
{
|
|
wr.SendStatus (503, "Service unavailable");
|
|
wr.SendUnknownResponseHeader ("Connection", "close");
|
|
Encoding enc = Encoding.ASCII;
|
|
wr.SendUnknownResponseHeader ("Content-Type", "text/html; charset=" + enc.WebName);
|
|
byte [] contentBytes = enc.GetBytes (content503);
|
|
wr.SendUnknownResponseHeader ("Content-Length", contentBytes.Length.ToString ());
|
|
wr.SendResponseFromMemory (contentBytes, contentBytes.Length);
|
|
wr.FlushResponse (true);
|
|
wr.CloseConnection ();
|
|
HttpApplication.requests_total_counter.Increment ();
|
|
}
|
|
|
|
[AspNetHostingPermissionAttribute(SecurityAction.Demand, Level = AspNetHostingPermissionLevel.Unrestricted)]
|
|
[MonoDocumentationNote ("Always returns null on Mono")]
|
|
public static NamedPermissionSet GetNamedPermissionSet ()
|
|
{
|
|
return null;
|
|
}
|
|
|
|
static internal void WritePreservationFile (Assembly asm, string genericNameBase)
|
|
{
|
|
if (asm == null)
|
|
throw new ArgumentNullException ("asm");
|
|
if (String.IsNullOrEmpty (genericNameBase))
|
|
throw new ArgumentNullException ("genericNameBase");
|
|
|
|
string compiled = Path.Combine (AppDomain.CurrentDomain.SetupInformation.DynamicBase,
|
|
genericNameBase + ".compiled");
|
|
PreservationFile pf = new PreservationFile ();
|
|
try {
|
|
pf.VirtualPath = String.Concat ("/", genericNameBase, "/");
|
|
|
|
AssemblyName an = asm.GetName ();
|
|
pf.Assembly = an.Name;
|
|
pf.ResultType = BuildResultTypeCode.TopLevelAssembly;
|
|
pf.Save (compiled);
|
|
} catch (Exception ex) {
|
|
throw new HttpException (
|
|
String.Format ("Failed to write preservation file {0}", genericNameBase + ".compiled"),
|
|
ex);
|
|
}
|
|
}
|
|
|
|
static Assembly ResolveAssemblyHandler(object sender, ResolveEventArgs e)
|
|
{
|
|
AssemblyName an = new AssemblyName (e.Name);
|
|
string dynamic_base = AppDomain.CurrentDomain.SetupInformation.DynamicBase;
|
|
string compiled = Path.Combine (dynamic_base, an.Name + ".compiled");
|
|
string asmPath;
|
|
|
|
if (!File.Exists (compiled)) {
|
|
string fn = an.FullName;
|
|
if (!RegisteredAssemblies.Find ((uint)fn.GetHashCode (), fn, out asmPath))
|
|
return null;
|
|
} else {
|
|
PreservationFile pf;
|
|
try {
|
|
pf = new PreservationFile (compiled);
|
|
} catch (Exception ex) {
|
|
throw new HttpException (
|
|
String.Format ("Failed to read preservation file {0}", an.Name + ".compiled"),
|
|
ex);
|
|
}
|
|
asmPath = Path.Combine (dynamic_base, pf.Assembly + ".dll");
|
|
}
|
|
|
|
if (String.IsNullOrEmpty (asmPath))
|
|
return null;
|
|
|
|
Assembly ret = null;
|
|
try {
|
|
ret = Assembly.LoadFrom (asmPath);
|
|
} catch (Exception) {
|
|
// ignore
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
internal static void EnableAssemblyMapping (bool enable)
|
|
{
|
|
lock (assemblyMappingLock) {
|
|
if (assemblyMappingEnabled == enable)
|
|
return;
|
|
if (enable)
|
|
AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler (ResolveAssemblyHandler);
|
|
else
|
|
AppDomain.CurrentDomain.AssemblyResolve -= new ResolveEventHandler (ResolveAssemblyHandler);
|
|
assemblyMappingEnabled = enable;
|
|
}
|
|
}
|
|
|
|
internal static TraceManager TraceManager {
|
|
get {
|
|
return trace_manager;
|
|
}
|
|
}
|
|
}
|
|
}
|