|
//------------------------------------------------------------------------------
// <copyright file="MetabaseServerConfig.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Configuration {
using System.Configuration;
using System.Collections;
using System.Globalization;
using System.Text;
using System.IO;
using System.Web.Util;
using System.Web.Hosting;
using System.Web.Caching;
using Microsoft.Win32;
class MetabaseServerConfig : IServerConfig, IConfigMapPath, IConfigMapPath2 {
private const string DEFAULT_SITEID = "1";
private const string DEFAULT_ROOTAPPID = "/LM/W3SVC/1/ROOT";
private const int MAX_PATH=260;
private const int BUFSIZE = MAX_PATH + 1;
private const string LMW3SVC_PREFIX = "/LM/W3SVC/";
private const string ROOT_SUFFIX="/ROOT";
static private MetabaseServerConfig s_instance;
static private object s_initLock = new Object();
string _defaultSiteName;
string _siteIdForCurrentApplication;
static internal IServerConfig GetInstance() {
if (s_instance == null) {
lock (s_initLock) {
if (s_instance == null) {
s_instance = new MetabaseServerConfig();
}
}
}
return s_instance;
}
private MetabaseServerConfig() {
HttpRuntime.ForceStaticInit(); // force webengine.dll to load
// Get the default site information
bool found = MBGetSiteNameFromSiteID(DEFAULT_SITEID, out _defaultSiteName);
_siteIdForCurrentApplication = HostingEnvironment.SiteID;
if (_siteIdForCurrentApplication == null) {
_siteIdForCurrentApplication = DEFAULT_SITEID;
}
}
string IServerConfig.GetSiteNameFromSiteID(string siteID) {
if (StringUtil.EqualsIgnoreCase(siteID, DEFAULT_SITEID))
return _defaultSiteName;
string siteName;
bool found = MBGetSiteNameFromSiteID(siteID, out siteName);
return siteName;
}
// if appHost is null, we use the site ID for the current application
string IServerConfig.MapPath(IApplicationHost appHost, VirtualPath path) {
string siteID = (appHost == null) ? _siteIdForCurrentApplication : appHost.GetSiteID();
return MapPathCaching(siteID, path);
}
string[] IServerConfig.GetVirtualSubdirs(VirtualPath path, bool inApp) {
string aboPath = GetAboPath(_siteIdForCurrentApplication, path.VirtualPathString);
return MBGetVirtualSubdirs(aboPath, inApp);
}
bool IServerConfig.GetUncUser(IApplicationHost appHost, VirtualPath path, out string username, out string password) {
string aboPath = GetAboPath(appHost.GetSiteID(), path.VirtualPathString);
return MBGetUncUser(aboPath, out username, out password);
}
long IServerConfig.GetW3WPMemoryLimitInKB() {
return (long) MBGetW3WPMemoryLimitInKB();
}
string IConfigMapPath.GetMachineConfigFilename() {
return HttpConfigurationSystem.MachineConfigurationFilePath;
}
string IConfigMapPath.GetRootWebConfigFilename() {
return HttpConfigurationSystem.RootWebConfigurationFilePath;
}
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;
}
}
// Based on <siteID, path>, return:
// directory - the physical directory of the path (vpath)
// baseName - name of the configuration file to look for.
// E.g. if siteID="1" and path="/", directory="c:\inetpub\wwwroot" and baseName="web.config"
void IConfigMapPath.GetPathConfigFilename(
string siteID, string path, out string directory, out string baseName) {
GetPathConfigFilenameWorker(siteID, VirtualPath.Create(path), out directory, out baseName);
}
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) {
siteName = _defaultSiteName;
siteID = DEFAULT_SITEID;
}
void IConfigMapPath.ResolveSiteArgument(string siteArgument, out string siteName, out string siteID) {
if ( String.IsNullOrEmpty(siteArgument) ||
StringUtil.EqualsIgnoreCase(siteArgument, DEFAULT_SITEID) ||
StringUtil.EqualsIgnoreCase(siteArgument, _defaultSiteName)) {
siteName = _defaultSiteName;
siteID = DEFAULT_SITEID;
}
else {
siteName = String.Empty;
siteID = String.Empty;
bool found = false;
if (IISMapPath.IsSiteId(siteArgument)) {
found = MBGetSiteNameFromSiteID(siteArgument, out siteName);
}
if (found) {
siteID = siteArgument;
}
else {
found = MBGetSiteIDFromSiteName(siteArgument, out siteID);
if (found) {
siteName = siteArgument;
}
else {
siteName = siteArgument;
siteID = String.Empty;
}
}
}
}
// Map from <siteID, path> to a physical file path
string IConfigMapPath.MapPath(string siteID, string vpath) {
return MapPathCaching(siteID, VirtualPath.Create(vpath));
}
// IConfigMapPath2 VirtualPath fast path
string IConfigMapPath2.MapPath(string siteID, VirtualPath vpath) {
return MapPathCaching(siteID, vpath);
}
VirtualPath GetAppPathForPathWorker(string siteID, VirtualPath vpath) {
string aboPath = GetAboPath(siteID, vpath.VirtualPathString);
string appAboPath = MBGetAppPath(aboPath);
if (appAboPath == null)
return VirtualPath.RootVirtualPath;
string rootAboPath = GetRootAppIDFromSiteID(siteID);
if (StringUtil.EqualsIgnoreCase(rootAboPath, appAboPath)) {
return VirtualPath.RootVirtualPath;
}
string appPath = appAboPath.Substring(rootAboPath.Length);
return VirtualPath.CreateAbsolute(appPath);
}
string IConfigMapPath.GetAppPathForPath(string siteID, string vpath) {
VirtualPath resolved = GetAppPathForPathWorker(siteID, VirtualPath.Create(vpath));
return resolved.VirtualPathString;
}
// IConfigMapPath2 VirtualPath fast path
VirtualPath IConfigMapPath2.GetAppPathForPath(string siteID, VirtualPath vpath) {
return GetAppPathForPathWorker(siteID, vpath);
}
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) && !UrlPath.PathIsDriveRoot(result)) {
result = result + "\\";
}
}
else {
if (UrlPath.PathEndsWithExtraSlash(result) && !UrlPath.PathIsDriveRoot(result)) {
result = result.Substring(0, result.Length - 1);
}
}
return result;
}
private string MapPathCaching(string siteID, VirtualPath path) {
// UrlMetaDataSlidingExpiration config setting controls
// the duration of all cached items related to url metadata.
bool doNotCache = CachedPathData.DoNotCacheUrlMetadata;
TimeSpan slidingExpiration = CachedPathData.UrlMetadataSlidingExpiration;
// store a single variation of the path
VirtualPath originalPath = path;
MapPathCacheInfo cacheInfo;
if (doNotCache) {
cacheInfo = new MapPathCacheInfo();
}
else {
// Check if it's in the cache
String cacheKey = CacheInternal.PrefixMapPath + siteID + path.VirtualPathString;
cacheInfo = (MapPathCacheInfo)HttpRuntime.Cache.InternalCache.Get(cacheKey);
// If not in cache, add it to the cache
if (cacheInfo == null) {
cacheInfo = new MapPathCacheInfo();
// Add to the cache.
// No need to have a lock here. UtcAdd will add the entry if it doesn't exist.
// If it does exist, the existing value will be returned (Dev10 Bug 755034).
object existingEntry = HttpRuntime.Cache.InternalCache.Add(cacheKey, cacheInfo, new CacheInsertOptions() { SlidingExpiration = slidingExpiration });
if (existingEntry != null) {
cacheInfo = existingEntry as MapPathCacheInfo;
}
}
}
// If not been evaluated, then evaluate it
if (!cacheInfo.Evaluated) {
lock(cacheInfo) {
if (!cacheInfo.Evaluated && HttpRuntime.IsMapPathRelaxed) {
//////////////////////////////////////////////////////////////////
// Verify that the parent path is valid. If parent is invalid, then set this to invalid
if (path.VirtualPathString.Length > 1) {
VirtualPath vParent = path.Parent;
if (vParent != null) {
string parentPath = vParent.VirtualPathString;
if (parentPath.Length > 1 && StringUtil.StringEndsWith(parentPath, '/')) { // Trim the extra trailing / if there is one
vParent = VirtualPath.Create(parentPath.Substring(0, parentPath.Length - 1));
}
try {
string parentMapPathResult = MapPathCaching(siteID, vParent);
if (parentMapPathResult == HttpRuntime.GetRelaxedMapPathResult(null)) {
// parent is invalid!
cacheInfo.MapPathResult = parentMapPathResult;
cacheInfo.Evaluated = true;
}
} catch {
cacheInfo.MapPathResult = HttpRuntime.GetRelaxedMapPathResult(null);
cacheInfo.Evaluated = true;
}
}
}
}
if (!cacheInfo.Evaluated) {
string physicalPath = null;
try {
physicalPath = MapPathActual(siteID, path);
if (HttpRuntime.IsMapPathRelaxed) {
physicalPath = HttpRuntime.GetRelaxedMapPathResult(physicalPath);
}
// Throw if the resulting physical path is not canonical, to prevent potential
// security issues (VSWhidbey 418125)
if (FileUtil.IsSuspiciousPhysicalPath(physicalPath)) {
if (HttpRuntime.IsMapPathRelaxed) {
physicalPath = HttpRuntime.GetRelaxedMapPathResult(null);
} else {
throw new HttpException(SR.GetString(SR.Cannot_map_path, path));
}
}
} catch (Exception e) {
if (HttpRuntime.IsMapPathRelaxed) {
physicalPath = HttpRuntime.GetRelaxedMapPathResult(null);
} else {
cacheInfo.CachedException = e;
cacheInfo.Evaluated=true;
throw;
}
}
if ( physicalPath != null ) {
// Only cache if we got a good value
cacheInfo.MapPathResult = physicalPath;
cacheInfo.Evaluated = true;
}
}
}
}
// Throw an exception if required
if (cacheInfo.CachedException != null) {
throw cacheInfo.CachedException;
}
return MatchResult(originalPath, cacheInfo.MapPathResult);
}
private string MapPathActual(string siteID, VirtualPath path) {
string appID = GetRootAppIDFromSiteID(siteID);
string physicalPath = MBMapPath(appID, path.VirtualPathString);
return physicalPath;
}
private string GetRootAppIDFromSiteID(string siteId) {
return LMW3SVC_PREFIX + siteId + ROOT_SUFFIX;
}
private string GetAboPath(string siteID, string path) {
string rootAppID = GetRootAppIDFromSiteID(siteID);
string aboPath = rootAppID + FixupPathSlash(path);
return aboPath;
}
private string FixupPathSlash(string path) {
if (path == null) {
return null;
}
int l = path.Length;
if (l == 0 || path[l-1] != '/') {
return path;
}
return path.Substring(0, l-1);
}
//
// Metabase access functions
//
private bool MBGetSiteNameFromSiteID(string siteID, out string siteName) {
string appID = GetRootAppIDFromSiteID(siteID);
StringBuilder sb = new StringBuilder(BUFSIZE);
int r = UnsafeNativeMethods.IsapiAppHostGetSiteName(appID, sb, sb.Capacity);
if (r == 1) {
siteName = sb.ToString();
return true;
}
else {
siteName = String.Empty;
return false;
}
}
private bool MBGetSiteIDFromSiteName(string siteName, out string siteID) {
StringBuilder sb = new StringBuilder(BUFSIZE);
int r = UnsafeNativeMethods.IsapiAppHostGetSiteId(siteName, sb, sb.Capacity);
if (r == 1) {
siteID = sb.ToString();
return true;
}
else {
siteID = String.Empty;
return false;
}
}
private string MBMapPath(string appID, string path) {
// keep growing the buffer to support paths longer than MAX_PATH
int bufSize = BUFSIZE;
StringBuilder sb;
int r;
for (;;) {
sb = new StringBuilder(bufSize);
r = UnsafeNativeMethods.IsapiAppHostMapPath(appID, path, sb, sb.Capacity);
Debug.Trace("MapPath", "IsapiAppHostMapPath(" + path + ") returns " + r);
if (r == -2) {
// insufficient buffer
bufSize *= 2;
}
else {
break;
}
}
if (r == -1) {
// special case access denied error
throw new HostingEnvironmentException(
SR.GetString(SR.Cannot_access_mappath_title),
SR.GetString(SR.Cannot_access_mappath_details));
}
string physicalPath;
if (r == 1) {
physicalPath = sb.ToString();
}
else {
physicalPath = null;
}
return physicalPath;
}
private string[] MBGetVirtualSubdirs(string aboPath, bool inApp) {
StringBuilder sb = new StringBuilder(BUFSIZE);
int index = 0;
ArrayList list = new ArrayList();
for (;;) {
sb.Length = 0;
int r = UnsafeNativeMethods.IsapiAppHostGetNextVirtualSubdir(aboPath, inApp, ref index, sb, sb.Capacity);
if (r == 0)
break;
string subdir = sb.ToString();
list.Add(subdir);
}
string[] subdirs = new string[list.Count];
list.CopyTo(subdirs);
return subdirs;
}
private bool MBGetUncUser(string aboPath, out string username, out string password) {
StringBuilder usr = new StringBuilder(BUFSIZE);
StringBuilder pwd = new StringBuilder(BUFSIZE);
int r = UnsafeNativeMethods.IsapiAppHostGetUncUser(aboPath, usr, usr.Capacity, pwd, pwd.Capacity);
if (r == 1) {
username = usr.ToString();
password = pwd.ToString();
return true;
}
else {
username = null;
password = null;
return false;
}
}
private int MBGetW3WPMemoryLimitInKB() {
return UnsafeNativeMethods.GetW3WPMemoryLimitInKB();
}
private string MBGetAppPath(string aboPath) {
StringBuilder buf = new StringBuilder(aboPath.Length + 1);
int r = UnsafeNativeMethods.IsapiAppHostGetAppPath(aboPath, buf, buf.Capacity);
string appAboPath;
if (r == 1) {
appAboPath = buf.ToString();
}
else {
appAboPath = null;
}
return appAboPath;
}
}
}
|