Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Web / System / Web / Services / Discovery / DynamicVirtualDiscoSearcher.cs / 1305376 / DynamicVirtualDiscoSearcher.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Services.Discovery { using System; using System.IO; using System.Collections; using System.Web; using System.Web.Caching; using System.Diagnostics; using System.Text; using System.DirectoryServices; using System.Web.Services.Configuration; using System.ComponentModel; using System.Globalization; using System.Threading; using System.Web.Services.Diagnostics; ////// /// Does a recursive search of virtual subdirectories to find stuff to /// make a disco file from. *.disco files (or whatever the PrimarySearchPattern is) are /// treated as end-points - recursion stops where they are found. /// internal class DynamicVirtualDiscoSearcher : DynamicDiscoSearcher { private string rootPathAsdi; // ADSI search root path with prefix private string entryPathPrefix; private string startDir; // If we could get an event back from IIS Admin Object that some directory is addred/removed/renamed // then the following memeber should become static, so we get 5-10 _times_ performace gain on // processing .vsdisco in the Web Root // !!SEE ALSO!! CleanupCache method private /*static*/ Hashtable webApps = new Hashtable(); private Hashtable Adsi = new Hashtable(); // ------------------------------------------------------------------------------- internal DynamicVirtualDiscoSearcher(string startDir, string[] excludedUrls, string rootUrl) : base(excludedUrls) { origUrl = rootUrl; entryPathPrefix = GetWebServerForUrl( rootUrl ) + "/ROOT"; this.startDir = startDir; string localPath = (new System.Uri(rootUrl)).LocalPath; if ( localPath.Equals("/") ) localPath = ""; // empty local path should be "" rootPathAsdi = entryPathPrefix + localPath; } // ------------------------------------------------------------------------------- ////// /// Main function. Searches dir recursively for primary (.vsdisco) and seconary (.asmx) files. /// internal override void Search(string fileToSkipAtBegin) { SearchInit(fileToSkipAtBegin); ScanDirectory( rootPathAsdi ); CleanupCache(); } // -------------------------------------------------------------------------------- // Look in virtual subdirectories. protected override void SearchSubDirectories(string nameAdsiDir) { if ( CompModSwitches.DynamicDiscoverySearcher.TraceVerbose ) Debug.WriteLine( "DynamicVirtualDiscoSearcher.SearchSubDirectories(): nameAdsiDir=" + nameAdsiDir); DirectoryEntry vdir = (DirectoryEntry)Adsi[nameAdsiDir]; //may be already bound if (vdir == null) { if ( !DirectoryEntry.Exists(nameAdsiDir) ) return; vdir = new DirectoryEntry(nameAdsiDir); Adsi[nameAdsiDir] = vdir; } foreach (DirectoryEntry obj in vdir.Children) { DirectoryEntry child = (DirectoryEntry)Adsi[obj.Path]; if (child == null) { child = obj; Adsi[obj.Path] = obj; }else { obj.Dispose(); } AppSettings settings = GetAppSettings(child); if (settings != null) { ScanDirectory(child.Path); //go down ADSI path } } } // ------------------------------------------------------------------------------- protected override DirectoryInfo GetPhysicalDir(string dir ) { DirectoryEntry vdir = (DirectoryEntry)Adsi[dir]; if (vdir == null) { if (!DirectoryEntry.Exists(dir) ) { return null; } vdir = new DirectoryEntry(dir); Adsi[dir] = vdir; } try { DirectoryInfo directory = null; AppSettings settings = GetAppSettings(vdir); if (settings == null) { return null; } if (settings.VPath == null) { //SchemaClassName == "IIsWebDirectory" //NOTE This assumes there was a known physical directory //corresponding to a parent WebDirectory. //And incoming 'dir' is a child of that parent. if( !dir.StartsWith(rootPathAsdi, StringComparison.Ordinal) ) { throw new ArgumentException(Res.GetString(Res.WebVirtualDisoRoot,dir,rootPathAsdi),"dir"); } string physicalDir = dir.Substring(rootPathAsdi.Length); physicalDir = physicalDir.Replace('/','\\'); //it always begins with '/' or is empty directory = new DirectoryInfo(startDir + physicalDir); } else { directory = new DirectoryInfo(settings.VPath);//SchemaClassName == "IIsWebVirtualDir } if ( directory.Exists ) return directory; } catch (Exception e) { if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) { throw; } if ( CompModSwitches.DynamicDiscoverySearcher.TraceVerbose ) Debug.WriteLine( "+++ DynamicVirtualDiscoSearcher.GetPhysicalDir(): dir=" + dir + " Exception=" + e.ToString() ); if (Tracing.On) Tracing.ExceptionCatch(TraceEventType.Warning, this, "GetPhysicalDir", e); return null; } return null; } // -------------------------------------------------------------------------------- // Calculate root ADSI virtual directory name (func by '[....]'). private string GetWebServerForUrl(string url) { Uri uri = new Uri(url); DirectoryEntry w3Service = new DirectoryEntry("IIS://" + uri.Host + "/W3SVC"); foreach (DirectoryEntry obj in w3Service.Children) { DirectoryEntry site = (DirectoryEntry)Adsi[obj.Path]; //may be already bound if (site == null) { site = obj; Adsi[obj.Path] = obj; } else { obj.Dispose(); } AppSettings settings = GetAppSettings(site); if (settings == null || settings.Bindings == null) { //SchemaClassName != "IIsWebServer" continue; } foreach (string bindingsEntry in settings.Bindings) { if ( CompModSwitches.DynamicDiscoverySearcher.TraceVerbose ) Debug.WriteLine("GetWebServerForUrl() bindingsEntry=" + bindingsEntry); string[] bindings = bindingsEntry.Split(':'); string ip = bindings[0]; string port = bindings[1]; string hostname = bindings[2]; if (Convert.ToInt32(port, CultureInfo.InvariantCulture) != uri.Port) continue; if (uri.HostNameType == UriHostNameType.Dns) { if (hostname.Length == 0 || string.Compare(hostname, uri.Host, StringComparison.OrdinalIgnoreCase) == 0) return site.Path; } else { if (ip.Length == 0 || string.Compare(ip, uri.Host, StringComparison.OrdinalIgnoreCase) == 0) return site.Path; } } } return null; } // -------------------------------------------------------------------------------- // Makes result URL found file path from diectory name and short file name. protected override string MakeResultPath(string dirName, string fileName) { string res = origUrl + dirName.Substring(rootPathAsdi.Length, dirName.Length - rootPathAsdi.Length) + '/' + fileName; return res; } // ------------------------------------------------------------------------------- // Makes exclusion path absolute for quick comparision on search. protected override string MakeAbsExcludedPath(string pathRelativ) { return rootPathAsdi + '/' + pathRelativ.Replace('\\', '/'); } // -------------------------------------------------------------------------------- protected override bool IsVirtualSearch { get { return true; } } private AppSettings GetAppSettings(DirectoryEntry entry) { string key = entry.Path; //this is fast since does not cause bind() AppSettings result = null; object obj = webApps[key]; if (obj == null) { // We provie a write lock while Hashtable supports multiple readers under single writer lock (webApps) { obj = webApps[key]; if (obj == null) { //make sure other thread not taken care of result = new AppSettings(entry); //that consumes a 50-2000 ms webApps[key] = result; } } } else { result = (AppSettings)obj; } return result.AccessRead? result: null; //ignore denied object on upper level } private void CleanupCache() { //Destroy system resources excplicitly since the destructor is called sometime late foreach (DictionaryEntry obj in Adsi) { ((DirectoryEntry)(obj.Value)).Dispose(); } rootPathAsdi = null; entryPathPrefix = null; startDir = null; Adsi = null; //REMOVE NEXT LINE IF the member webApps has turned into static (see webApps declaration line) webApps = null; } private class AppSettings { internal readonly bool AccessRead = false; // if false the caller will ignore the object internal readonly string[] Bindings = null; // the field is only for WebServers internal readonly string VPath = null; // the filed is only for VirtualDirs internal AppSettings(DirectoryEntry entry) { string schema = entry.SchemaClassName; AccessRead = true; if (schema == "IIsWebVirtualDir" || schema == "IIsWebDirectory"){ if (!(bool)(entry.Properties["AccessRead"][0])) { AccessRead = false; return; } if (schema == "IIsWebVirtualDir") { VPath = (string) (entry.Properties["Path"][0]); } } else if (schema == "IIsWebServer") { Bindings = new string[entry.Properties["ServerBindings"].Count]; for (int i = 0; i < Bindings.Length; ++i) { Bindings[i] = (string) (entry.Properties["ServerBindings"][i]); } } else { //schema is not recognized add to the cache but never look at the object AccessRead = false; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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