343 lines
15 KiB
C#
343 lines
15 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="ProcessHostMapPath.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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namespace System.Web.Configuration {
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using System;
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using System.Collections;
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using System.Configuration;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Web.Caching;
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using System.Web.Hosting;
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using System.Web.UI;
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using System.Web.Util;
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using System.Xml;
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//
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// Uses IIS 7 native config
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//
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internal sealed class ProcessHostMapPath : IConfigMapPath, IConfigMapPath2 {
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IProcessHostSupportFunctions _functions;
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internal static string _DefaultPhysicalPathOnMapPathFailure = null;
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static ProcessHostMapPath() {
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HttpRuntime.ForceStaticInit();
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}
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[SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands", Justification = "We carefully control this method's caller.")]
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internal ProcessHostMapPath(IProcessHostSupportFunctions functions) {
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// if the functions are null and we're
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// not in a worker process, init the mgdeng config system
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if (null == functions) {
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ProcessHostConfigUtils.InitStandaloneConfig();
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}
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// we need to explicit create a COM proxy in this app domain
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// so we don't go back to the default domain or have lifetime issues
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if (null != functions) {
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_functions = Misc.CreateLocalSupportFunctions(functions);
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}
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// proactive set the config functions for
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// webengine in case this is a TCP init path
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if (null != _functions ) {
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IntPtr configSystem = _functions.GetNativeConfigurationSystem();
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Debug.Assert(IntPtr.Zero != configSystem, "null != configSystem");
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if (IntPtr.Zero != configSystem) {
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// won't fail if valid pointer
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// no cleanup needed, we don't own instance
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UnsafeIISMethods.MgdSetNativeConfiguration(configSystem);
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}
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}
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}
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string IConfigMapPath.GetMachineConfigFilename() {
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return HttpConfigurationSystem.MachineConfigurationFilePath;
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}
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string IConfigMapPath.GetRootWebConfigFilename() {
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string rootWeb = null;
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if (null != _functions) {
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rootWeb = _functions.GetRootWebConfigFilename();
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}
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if (String.IsNullOrEmpty(rootWeb)) {
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rootWeb = HttpConfigurationSystem.RootWebConfigurationFilePath;
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}
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Debug.Trace("MapPath", "ProcHostMP.GetRootWebConfigFilename = " +
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rootWeb);
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Debug.Assert(!String.IsNullOrEmpty(rootWeb), "rootWeb != null or empty");
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return rootWeb;
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}
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private void GetPathConfigFilenameWorker(string siteID, VirtualPath path, out string directory, out string baseName) {
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directory = MapPathCaching(siteID, path);
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if (directory != null) {
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baseName = HttpConfigurationSystem.WebConfigFileName;
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}
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else {
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baseName = null;
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}
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Debug.Trace("MapPath", "ProcHostMP.GetPathConfigFilename(" + siteID + ", " + path + ")\n" +
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" result = " + directory + " and " + baseName + "\n");
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}
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void IConfigMapPath.GetPathConfigFilename(
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string siteID, string path, out string directory, out string baseName) {
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GetPathConfigFilenameWorker(siteID, VirtualPath.Create(path), out directory, out baseName);
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}
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// IConfigMapPath2 VirtualPath variant
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void IConfigMapPath2.GetPathConfigFilename(
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string siteID,
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VirtualPath path,
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out string directory,
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out string baseName) {
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GetPathConfigFilenameWorker(siteID, path, out directory, out baseName);
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}
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void IConfigMapPath.GetDefaultSiteNameAndID(out string siteName, out string siteID) {
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Debug.Trace("MapPath", "ProcHostMP.GetDefaultSiteNameAndID\n");
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siteID = ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING;
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siteName = ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT);
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}
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void IConfigMapPath.ResolveSiteArgument(string siteArgument, out string siteName, out string siteID) {
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Debug.Trace("MapPath", "ProcHostMP.ResolveSiteArgument(" + siteArgument + ")\n");
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if ( String.IsNullOrEmpty(siteArgument) ||
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StringUtil.EqualsIgnoreCase(siteArgument, ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING) ||
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StringUtil.EqualsIgnoreCase(siteArgument, ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT))) {
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siteName = ProcessHostConfigUtils.GetSiteNameFromId(ProcessHostConfigUtils.DEFAULT_SITE_ID_UINT);
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siteID = ProcessHostConfigUtils.DEFAULT_SITE_ID_STRING;
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}
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else {
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siteName = String.Empty;
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siteID = String.Empty;
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string resolvedName = null;
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if (IISMapPath.IsSiteId(siteArgument)) {
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uint id;
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if (UInt32.TryParse(siteArgument, out id)) {
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resolvedName = ProcessHostConfigUtils.GetSiteNameFromId(id);
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}
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}
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// try to resolve the string
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else {
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uint id = UnsafeIISMethods.MgdResolveSiteName(IntPtr.Zero, siteArgument);
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if (id != 0) {
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siteID = id.ToString(CultureInfo.InvariantCulture);
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siteName = siteArgument;
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return;
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}
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}
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if (!String.IsNullOrEmpty(resolvedName)) {
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siteName = resolvedName;
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siteID = siteArgument;
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}
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else {
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siteName = siteArgument;
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siteID = String.Empty;
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}
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}
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Debug.Assert(!String.IsNullOrEmpty(siteName), "!String.IsNullOrEmpty(siteName), siteArg=" + siteArgument);
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}
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private string MapPathWorker(string siteID, VirtualPath path) {
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Debug.Trace("MapPath", "ProcHostMP.MapPath(" + siteID + ", " + path + ")\n");
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return MapPathCaching(siteID, path);
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}
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// IConfigMapPath2 variant with VirtualPath
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string IConfigMapPath2.MapPath(string siteID, VirtualPath path) {
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return MapPathWorker(siteID, path);
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}
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string IConfigMapPath.MapPath(string siteID, string path) {
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return MapPathWorker(siteID, VirtualPath.Create(path));
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}
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string IConfigMapPath.GetAppPathForPath(string siteID, string path) {
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VirtualPath resolved = GetAppPathForPathWorker(siteID, VirtualPath.Create(path));
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return resolved.VirtualPathString;
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}
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// IConfigMapPath2 variant with VirtualPath
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VirtualPath IConfigMapPath2.GetAppPathForPath(string siteID, VirtualPath path) {
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return GetAppPathForPathWorker(siteID, path);
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}
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VirtualPath GetAppPathForPathWorker(string siteID, VirtualPath path) {
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Debug.Trace("MapPath", "ProcHostMP.GetAppPathForPath(" + siteID + ", " + path.VirtualPathString + ")\n");
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uint siteValue = 0;
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if (!UInt32.TryParse(siteID, out siteValue)) {
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return VirtualPath.RootVirtualPath;
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}
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IntPtr pBstr = IntPtr.Zero;
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int cBstr = 0;
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string appPath;
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try {
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int result = UnsafeIISMethods.MgdGetAppPathForPath(IntPtr.Zero, siteValue, path.VirtualPathString, out pBstr, out cBstr);
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appPath = (result == 0 && cBstr > 0) ? StringUtil.StringFromWCharPtr(pBstr, cBstr) : null;
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}
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finally {
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if (pBstr != IntPtr.Zero) {
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Marshal.FreeBSTR(pBstr);
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}
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}
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return (appPath != null) ? VirtualPath.Create(appPath) : VirtualPath.RootVirtualPath;
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}
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private string MapPathCaching(string siteID, VirtualPath path) {
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// UrlMetaDataSlidingExpiration config setting controls
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// the duration of all cached items related to url metadata.
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bool doNotCache = CachedPathData.DoNotCacheUrlMetadata;
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TimeSpan slidingExpiration = CachedPathData.UrlMetadataSlidingExpiration;
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// store a single variation of the path
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VirtualPath originalPath = path;
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MapPathCacheInfo cacheInfo;
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if (doNotCache) {
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cacheInfo = new MapPathCacheInfo();
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}
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else {
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// Check if it's in the cache
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String cacheKey = CacheInternal.PrefixMapPath + siteID + path.VirtualPathString;
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cacheInfo = (MapPathCacheInfo)HttpRuntime.Cache.InternalCache.Get(cacheKey);
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// If not in cache, add it to the cache
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if (cacheInfo == null) {
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cacheInfo = new MapPathCacheInfo();
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// Add to the cache.
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// No need to have a lock here. UtcAdd will add the entry if it doesn't exist.
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// If it does exist, the existing value will be returned (Dev10 Bug 755034).
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object existingEntry = HttpRuntime.Cache.InternalCache.Add(cacheKey, cacheInfo, new CacheInsertOptions() { SlidingExpiration = slidingExpiration });
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if (existingEntry != null) {
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cacheInfo = existingEntry as MapPathCacheInfo;
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}
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}
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}
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// If not been evaluated, then evaluate it
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if (!cacheInfo.Evaluated) {
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lock(cacheInfo) {
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if (!cacheInfo.Evaluated && HttpRuntime.IsMapPathRelaxed) {
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//////////////////////////////////////////////////////////////////
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// Verify that the parent path is valid. If parent is invalid, then set this to invalid
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if (path.VirtualPathString.Length > 1) {
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VirtualPath vParent = path.Parent;
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if (vParent != null) {
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string parentPath = vParent.VirtualPathString;
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if (parentPath.Length > 1 && StringUtil.StringEndsWith(parentPath, '/')) { // Trim the extra trailing / if there is one
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vParent = VirtualPath.Create(parentPath.Substring(0, parentPath.Length - 1));
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}
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try {
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string parentMapPathResult = MapPathCaching(siteID, vParent);
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if (parentMapPathResult == HttpRuntime.GetRelaxedMapPathResult(null)) {
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// parent is invalid!
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cacheInfo.MapPathResult = parentMapPathResult;
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cacheInfo.Evaluated = true;
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}
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} catch {
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cacheInfo.MapPathResult = HttpRuntime.GetRelaxedMapPathResult(null);
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cacheInfo.Evaluated = true;
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}
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}
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}
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}
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if (!cacheInfo.Evaluated) {
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try {
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string physicalPath = null;
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uint siteIDValue;
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if (UInt32.TryParse(siteID, out siteIDValue)) {
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string siteName = ProcessHostConfigUtils.GetSiteNameFromId(siteIDValue);
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physicalPath = ProcessHostConfigUtils.MapPathActual(siteName, path);
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}
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if (physicalPath != null && physicalPath.Length == 2 && physicalPath[1] == ':')
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physicalPath += "\\";
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// Throw if the resulting physical path is not canonical, to prevent potential
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// security issues (VSWhidbey 418125)
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if (HttpRuntime.IsMapPathRelaxed) {
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physicalPath = HttpRuntime.GetRelaxedMapPathResult(physicalPath);
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}
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if (FileUtil.IsSuspiciousPhysicalPath(physicalPath)) {
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if (HttpRuntime.IsMapPathRelaxed) {
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physicalPath = HttpRuntime.GetRelaxedMapPathResult(null);
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} else {
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throw new HttpException(SR.GetString(SR.Cannot_map_path, path));
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}
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}
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cacheInfo.MapPathResult = physicalPath;
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} catch (Exception e) {
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if (HttpRuntime.IsMapPathRelaxed) {
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cacheInfo.MapPathResult = HttpRuntime.GetRelaxedMapPathResult(null);
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} else {
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cacheInfo.CachedException = e;
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cacheInfo.Evaluated=true;
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throw;
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}
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}
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cacheInfo.Evaluated = true;
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}
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}
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}
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// Throw an exception if required
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if (cacheInfo.CachedException != null) {
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throw cacheInfo.CachedException;
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}
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return MatchResult(originalPath, cacheInfo.MapPathResult);
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}
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private string MatchResult(VirtualPath path, string result) {
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if (string.IsNullOrEmpty(result)) {
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return result;
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}
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result = result.Replace('/', '\\');
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// ensure extra '\\' in the physical path if the virtual path had extra '/'
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// and the other way -- no extra '\\' in physical if virtual didn't have it.
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if (path.HasTrailingSlash) {
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if (!UrlPath.PathEndsWithExtraSlash(result)) {
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result = result + "\\";
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}
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}
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else {
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if (UrlPath.PathEndsWithExtraSlash(result)) {
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result = result.Substring(0, result.Length - 1);
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}
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}
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return result;
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}
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}
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}
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