Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / Web / Routing / RouteCollection.cs / 1305376 / RouteCollection.cs
namespace System.Web.Routing { using System.Collections.Generic; using System.Collections.ObjectModel; using System.Diagnostics.CodeAnalysis; using System.Globalization; using System.Threading; using System.Web.Hosting; using System.Runtime.CompilerServices; [TypeForwardedFrom("System.Web.Routing, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=31bf3856ad364e35")] public class RouteCollection : Collection{ private Dictionary _namedMap = new Dictionary (StringComparer.OrdinalIgnoreCase); private VirtualPathProvider _vpp; private ReaderWriterLockSlim _rwLock = new ReaderWriterLockSlim(); public RouteCollection() : this(HostingEnvironment.VirtualPathProvider) { } public RouteCollection(VirtualPathProvider virtualPathProvider) { _vpp = virtualPathProvider; } public bool RouteExistingFiles { get; set; } public RouteBase this[string name] { get { if (String.IsNullOrEmpty(name)) { return null; } RouteBase route; if (_namedMap.TryGetValue(name, out route)) { return route; } return null; } } public void Add(string name, RouteBase item) { if (item == null) { throw new ArgumentNullException("item"); } if (!String.IsNullOrEmpty(name)) { if (_namedMap.ContainsKey(name)) { throw new ArgumentException( String.Format( CultureInfo.CurrentUICulture, SR.GetString(SR.RouteCollection_DuplicateName), name), "name"); } } Add(item); if (!String.IsNullOrEmpty(name)) { _namedMap[name] = item; } } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "Warning was suppressed for consistency with existing similar routing API")] public Route MapPageRoute(string routeName, string routeUrl, string physicalFile) { return MapPageRoute(routeName, routeUrl, physicalFile, true /* checkPhysicalUrlAccess */, null, null, null); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "Warning was suppressed for consistency with existing similar routing API")] public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess) { return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, null, null, null); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "Warning was suppressed for consistency with existing similar routing API")] public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults) { return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, defaults, null, null); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "Warning was suppressed for consistency with existing similar routing API")] public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults, RouteValueDictionary constraints) { return MapPageRoute(routeName, routeUrl, physicalFile, checkPhysicalUrlAccess, defaults, constraints, null); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "Warning was suppressed for consistency with existing similar routing API")] public Route MapPageRoute(string routeName, string routeUrl, string physicalFile, bool checkPhysicalUrlAccess, RouteValueDictionary defaults, RouteValueDictionary constraints, RouteValueDictionary dataTokens) { if (routeUrl == null) { throw new ArgumentNullException("routeUrl"); } Route route = new Route(routeUrl, defaults, constraints, dataTokens, new PageRouteHandler(physicalFile, checkPhysicalUrlAccess)); Add(routeName, route); return route; } [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] protected override void ClearItems() { _namedMap.Clear(); base.ClearItems(); } [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "Not worth a breaking change.")] public IDisposable GetReadLock() { _rwLock.EnterReadLock(); return new ReadLockDisposable(_rwLock); } private RequestContext GetRequestContext(RequestContext requestContext) { if (requestContext != null) { return requestContext; } HttpContext httpContext = HttpContext.Current; if (httpContext == null) { throw new InvalidOperationException(SR.GetString(SR.RouteCollection_RequiresContext)); } return new RequestContext(new HttpContextWrapper(httpContext), new RouteData()); } public RouteData GetRouteData(HttpContextBase httpContext) { if (httpContext == null) { throw new ArgumentNullException("httpContext"); } if (httpContext.Request == null) { throw new ArgumentException(SR.GetString(SR.RouteTable_ContextMissingRequest), "httpContext"); } // Optimize performance when the route collection is empty. The main improvement is that we avoid taking // a read lock when the collection is empty. Without this check, the UrlRoutingModule causes a 25%-50% // regression in HelloWorld RPS due to lock contention. The UrlRoutingModule is now in the root web.config, // so we need to ensure the module is performant, especially when you are not using routing. // This check does introduce a slight bug, in that if a writer clears the collection as part of a write // transaction, a reader may see the collection when it's empty, which the read lock is supposed to prevent. // We will investigate a better fix in Dev10 Beta2. The Beta1 bug is Dev10 652986. if (Count == 0) { return null; } if (!RouteExistingFiles) { string requestPath = httpContext.Request.AppRelativeCurrentExecutionFilePath; if ((requestPath != "~/") && (_vpp != null) && (_vpp.FileExists(requestPath) || _vpp.DirectoryExists(requestPath))) { // If we're not routing existing files and the file exists, we stop processing routes return null; } } // Go through all the configured routes and find the first one that returns a match using (GetReadLock()) { foreach (RouteBase route in this) { RouteData routeData = route.GetRouteData(httpContext); if (routeData != null) { return routeData; } } } return null; } public VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values) { requestContext = GetRequestContext(requestContext); // Go through all the configured routes and find the first one that returns a match using (GetReadLock()) { foreach (RouteBase route in this) { VirtualPathData vpd = route.GetVirtualPath(requestContext, values); if (vpd != null) { vpd.VirtualPath = GetUrlWithApplicationPath(requestContext, vpd.VirtualPath); return vpd; } } } return null; } public VirtualPathData GetVirtualPath(RequestContext requestContext, string name, RouteValueDictionary values) { requestContext = GetRequestContext(requestContext); if (!String.IsNullOrEmpty(name)) { RouteBase namedRoute; bool routeFound; using (GetReadLock()) { routeFound = _namedMap.TryGetValue(name, out namedRoute); } if (routeFound) { VirtualPathData vpd = namedRoute.GetVirtualPath(requestContext, values); if (vpd != null) { vpd.VirtualPath = GetUrlWithApplicationPath(requestContext, vpd.VirtualPath); return vpd; } return null; } else { throw new ArgumentException( String.Format( CultureInfo.CurrentUICulture, SR.GetString(SR.RouteCollection_NameNotFound), name), "name"); } } else { return GetVirtualPath(requestContext, values); } } private static string GetUrlWithApplicationPath(RequestContext requestContext, string url) { string appPath = requestContext.HttpContext.Request.ApplicationPath ?? String.Empty; if (!appPath.EndsWith("/", StringComparison.OrdinalIgnoreCase)) { appPath += "/"; } return requestContext.HttpContext.Response.ApplyAppPathModifier(appPath + url); } [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate", Justification = "Not worth a breaking change.")] public IDisposable GetWriteLock() { _rwLock.EnterWriteLock(); return new WriteLockDisposable(_rwLock); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "This is not a regular URL as it may contain special routing characters.")] public void Ignore(string url) { Ignore(url, null /* constraints */); } [SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", Justification = "This is not a regular URL as it may contain special routing characters.")] public void Ignore(string url, object constraints) { if (url == null) { throw new ArgumentNullException("url"); } IgnoreRouteInternal route = new IgnoreRouteInternal(url) { Constraints = new RouteValueDictionary(constraints) }; Add(route); } [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] protected override void InsertItem(int index, RouteBase item) { if (item == null) { throw new ArgumentNullException("item"); } if (Contains(item)) { throw new ArgumentException( String.Format( CultureInfo.CurrentUICulture, SR.GetString(SR.RouteCollection_DuplicateEntry)), "item"); } base.InsertItem(index, item); } [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] protected override void RemoveItem(int index) { RemoveRouteName(index); base.RemoveItem(index); } private void RemoveRouteName(int index) { // Search for the specified route and clear out its name if we have one RouteBase route = this[index]; foreach (KeyValuePair namedRoute in _namedMap) { if (namedRoute.Value == route) { _namedMap.Remove(namedRoute.Key); break; } } } [SuppressMessage("Microsoft.Security", "CA2123:OverrideLinkDemandsShouldBeIdenticalToBase")] protected override void SetItem(int index, RouteBase item) { if (item == null) { throw new ArgumentNullException("item"); } if (Contains(item)) { throw new ArgumentException( String.Format( CultureInfo.CurrentUICulture, SR.GetString(SR.RouteCollection_DuplicateEntry)), "item"); } RemoveRouteName(index); base.SetItem(index, item); } private class ReadLockDisposable : IDisposable { private ReaderWriterLockSlim _rwLock; public ReadLockDisposable(ReaderWriterLockSlim rwLock) { _rwLock = rwLock; } [SuppressMessage("Microsoft.Usage", "CA1816:CallGCSuppressFinalizeCorrectly", Justification = "Type does not have a finalizer.")] void IDisposable.Dispose() { _rwLock.ExitReadLock(); } } private class WriteLockDisposable : IDisposable { private ReaderWriterLockSlim _rwLock; public WriteLockDisposable(ReaderWriterLockSlim rwLock) { _rwLock = rwLock; } [SuppressMessage("Microsoft.Usage", "CA1816:CallGCSuppressFinalizeCorrectly", Justification = "Type does not have a finalizer.")] void IDisposable.Dispose() { _rwLock.ExitWriteLock(); } } private sealed class IgnoreRouteInternal : Route { public IgnoreRouteInternal(string url) : base(url, new StopRoutingHandler()) { } public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary routeValues) { // Never match during route generation. This avoids the scenario where an IgnoreRoute with // fairly relaxed constraints ends up eagerly matching all generated URLs. return null; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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