Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Configuration / ProcessHostMapPath.cs / 3 / ProcessHostMapPath.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Configuration { using System.Configuration; using System.Collections; using System.Globalization; using System.Runtime.InteropServices; using System.Xml; using System.Text; using System.Web.Caching; using System.Web.Util; using System.Web.UI; using System.IO; using System.Web.Hosting; // // Uses IIS 7 native config // internal sealed class ProcessHostMapPath : IConfigMapPath, IConfigMapPath2 { IProcessHostSupportFunctions _functions; object _mapPathCacheLock; static ProcessHostMapPath() { HttpRuntime.ForceStaticInit(); } internal ProcessHostMapPath(IProcessHostSupportFunctions functions) { // if the functions are null and we're // not in a worker process, init the mgdeng config system if (null == functions) { ProcessHostConfigUtils.InitStandaloneConfig(); } // we need to explicit create a COM proxy in this app domain // so we don't go back to the default domain or have lifetime issues if (null != functions) { _functions = Misc.CreateLocalSupportFunctions(functions); } // proactive set the config functions for // webengine in case this is a TCP init path if (null != _functions ) { IntPtr configSystem = _functions.GetNativeConfigurationSystem(); Debug.Assert(IntPtr.Zero != configSystem, "null != configSystem"); if (IntPtr.Zero != configSystem) { // won't fail if valid pointer // no cleanup needed, we don't own instance UnsafeIISMethods.MgdSetNativeConfiguration(configSystem); } } _mapPathCacheLock = new Object(); } string IConfigMapPath.GetMachineConfigFilename() { return HttpConfigurationSystem.MachineConfigurationFilePath; } string IConfigMapPath.GetRootWebConfigFilename() { string rootWeb = null; if (null != _functions) { rootWeb = _functions.GetRootWebConfigFilename(); } if (String.IsNullOrEmpty(rootWeb)) { rootWeb = HttpConfigurationSystem.RootWebConfigurationFilePath; } Debug.Trace("MapPath", "ProcHostMP.GetRootWebConfigFilename = " + rootWeb); Debug.Assert(!String.IsNullOrEmpty(rootWeb), "rootWeb != null or empty"); return rootWeb; } private void GetPathConfigFilenameWorker(string siteID, VirtualPath path, out string directory, out string baseName) { directory = MapPathCaching(siteID, path); if (directory != null) { baseName = HttpConfigurationSystem.WebConfigFileName; } else { baseName = null; } Debug.Trace("MapPath", "ProcHostMP.GetPathConfigFilename(" + siteID + ", " + path + ")\n" + " result = " + directory + " and " + baseName + "\n"); } void IConfigMapPath.GetPathConfigFilename( string siteID, string path, out string directory, out string baseName) { GetPathConfigFilenameWorker(siteID, VirtualPath.Create(path), out directory, out baseName); } // IConfigMapPath2 VirtualPath variant void IConfigMapPath2.GetPathConfigFilename( string siteID, VirtualPath path, out string directory, out string baseName) { GetPathConfigFilenameWorker(siteID, path, out directory, out baseName); } void IConfigMapPath.GetDefaultSiteNameAndID(out string siteName, out string siteID) { Debug.Trace("MapPath", "ProcHostMP.GetDefaultSiteNameAndID\n"); siteID = ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING; siteName = ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT); } void IConfigMapPath.ResolveSiteArgument(string siteArgument, out string siteName, out string siteID) { Debug.Trace("MapPath", "ProcHostMP.ResolveSiteArgument(" + siteArgument + ")\n"); if ( String.IsNullOrEmpty(siteArgument) || StringUtil.EqualsIgnoreCase(siteArgument, ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING) || StringUtil.EqualsIgnoreCase(siteArgument, ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT))) { siteName = ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT); siteID = ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING; } else { siteName = String.Empty; siteID = String.Empty; string resolvedName = null; if (IISMapPath.IsSiteId(siteArgument)) { uint id; if (UInt32.TryParse(siteArgument, out id)) { resolvedName = ProcessHostConfigUtils.GetSiteNameFromId(id); } } // try to resolve the string else { uint id = UnsafeIISMethods.MgdResolveSiteName(siteArgument); if (id != 0) { siteID = id.ToString(CultureInfo.InvariantCulture); siteName = siteArgument; return; } } if (!String.IsNullOrEmpty(resolvedName)) { siteName = resolvedName; siteID = siteArgument; } else { siteName = siteArgument; siteID = String.Empty; } } Debug.Assert(!String.IsNullOrEmpty(siteName), "!String.IsNullOrEmpty(siteName), siteArg=" + siteArgument); } private string MapPathWorker(string siteID, VirtualPath path) { Debug.Trace("MapPath", "ProcHostMP.MapPath(" + siteID + ", " + path + ")\n"); return MapPathCaching(siteID, path); } // IConfigMapPath2 variant with VirtualPath string IConfigMapPath2.MapPath(string siteID, VirtualPath path) { return MapPathWorker(siteID, path); } string IConfigMapPath.MapPath(string siteID, string path) { return MapPathWorker(siteID, VirtualPath.Create(path)); } string IConfigMapPath.GetAppPathForPath(string siteID, string path) { VirtualPath resolved = GetAppPathForPathWorker(siteID, VirtualPath.Create(path)); return resolved.VirtualPathString; } // IConfigMapPath2 variant with VirtualPath VirtualPath IConfigMapPath2.GetAppPathForPath(string siteID, VirtualPath path) { return GetAppPathForPathWorker(siteID, path); } VirtualPath GetAppPathForPathWorker(string siteID, VirtualPath path) { Debug.Trace("MapPath", "ProcHostMP.GetAppPathForPath(" + siteID + ", " + path.VirtualPathString + ")\n"); uint siteValue = 0; if (!UInt32.TryParse(siteID, out siteValue)) { return VirtualPath.RootVirtualPath; } IntPtr pBstr = IntPtr.Zero; int cBstr = 0; string appPath; try { int result = UnsafeIISMethods.MgdGetAppPathForPath(siteValue, path.VirtualPathString, out pBstr, out cBstr); appPath = (result == 0 && cBstr > 0) ? StringUtil.StringFromWCharPtr(pBstr, cBstr) : null; } finally { if (pBstr != IntPtr.Zero) { Marshal.FreeBSTR(pBstr); } } return (appPath != null) ? VirtualPath.Create(appPath) : VirtualPath.RootVirtualPath; } private string MapPathCaching(string siteID, VirtualPath path) { // store a single variation of the path VirtualPath originalPath = path; // Check if it's in the cache String cacheKey = CacheInternal.PrefixMapPath + siteID + path.VirtualPathString; MapPathCacheInfo cacheInfo = (MapPathCacheInfo) HttpRuntime.CacheInternal.Get(cacheKey); // If not in cache, add it to the cache if (cacheInfo == null) { lock (_mapPathCacheLock) { cacheInfo = (MapPathCacheInfo) HttpRuntime.CacheInternal.Get(cacheKey); if (cacheInfo == null) { cacheInfo = new MapPathCacheInfo(); // Add to the cache: Valid for 10 minutes HttpRuntime.CacheInternal.UtcInsert(cacheKey, cacheInfo, null, DateTime.UtcNow.AddMinutes(10), Cache.NoSlidingExpiration); } } } // If not been evaluated, then evaluate it if (!cacheInfo.Evaluated) { lock(cacheInfo) { if (!cacheInfo.Evaluated) { try { string physicalPath = null; uint siteIDValue; if (UInt32.TryParse(siteID, out siteIDValue)) { string siteName = ProcessHostConfigUtils.GetSiteNameFromId(siteIDValue); physicalPath = ProcessHostConfigUtils.MapPathActual(siteName, path); } if (physicalPath != null && physicalPath.Length == 2 && physicalPath[1] == ':') physicalPath += "\\"; // Throw if the resulting physical path is not canonical, to prevent potential // security issues (VSWhidbey 418125) if (FileUtil.IsSuspiciousPhysicalPath(physicalPath)) { throw new HttpException(SR.GetString(SR.Cannot_map_path, path)); } cacheInfo.MapPathResult = physicalPath; } catch (Exception e) { cacheInfo.CachedException = e; cacheInfo.Evaluated=true; throw; } cacheInfo.Evaluated = true; } } } // Throw an exception if required if (cacheInfo.CachedException != null) { throw cacheInfo.CachedException; } return MatchResult(originalPath, cacheInfo.MapPathResult); } private string MatchResult(VirtualPath path, string result) { if (string.IsNullOrEmpty(result)) { return result; } result = result.Replace('/', '\\'); // ensure extra '\\' in the physical path if the virtual path had extra '/' // and the other way -- no extra '\\' in physical if virtual didn't have it. if (path.HasTrailingSlash) { if (!UrlPath.PathEndsWithExtraSlash(result)) { result = result + "\\"; } } else { if (UrlPath.PathEndsWithExtraSlash(result)) { result = result.Substring(0, result.Length - 1); } } return result; } } }
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