public IInternalConfigRecord GetConfigRecord(string configPath)
{
IInternalConfigRecord record4;
if (!ConfigPathUtility.IsValid(configPath))
{
throw ExceptionUtil.ParameterInvalid("configPath");
}
string[] parts = ConfigPathUtility.GetParts(configPath);
try
{
int num;
BaseConfigurationRecord record;
this.AcquireHierarchyLockForRead();
this.hlFindConfigRecord(parts, out num, out record);
if ((num == parts.Length) || !record.hlNeedsChildFor(parts[num]))
{
return(record);
}
}
finally
{
this.ReleaseHierarchyLockForRead();
}
try
{
int num2;
BaseConfigurationRecord record2;
this.AcquireHierarchyLockForWrite();
this.hlFindConfigRecord(parts, out num2, out record2);
if (num2 == parts.Length)
{
return(record2);
}
string parentConfigPath = string.Join("/", parts, 0, num2);
while ((num2 < parts.Length) && record2.hlNeedsChildFor(parts[num2]))
{
BaseConfigurationRecord record3;
string childConfigPath = parts[num2];
parentConfigPath = ConfigPathUtility.Combine(parentConfigPath, childConfigPath);
if (this._isDesignTime)
{
record3 = MgmtConfigurationRecord.Create(this, record2, parentConfigPath, null);
}
else
{
record3 = (BaseConfigurationRecord)RuntimeConfigurationRecord.Create(this, record2, parentConfigPath);
}
record2.hlAddChild(childConfigPath, record3);
num2++;
record2 = record3;
}
record4 = record2;
}
finally
{
this.ReleaseHierarchyLockForWrite();
}
return(record4);
}
private void RemoveConfigImpl(string configPath, BaseConfigurationRecord configRecord)
{
BaseConfigurationRecord record;
if (!ConfigPathUtility.IsValid(configPath))
{
throw ExceptionUtil.ParameterInvalid("configPath");
}
string[] parts = ConfigPathUtility.GetParts(configPath);
try
{
int num;
this.AcquireHierarchyLockForWrite();
this.hlFindConfigRecord(parts, out num, out record);
if ((num != parts.Length) || ((configRecord != null) && !object.ReferenceEquals(configRecord, record)))
{
return;
}
record.Parent.hlRemoveChild(parts[parts.Length - 1]);
}
finally
{
this.ReleaseHierarchyLockForWrite();
}
this.OnConfigRemoved(new InternalConfigEventArgs(configPath));
record.CloseRecursive();
}
// Find and remove the config record and all its children for the config path.
// Optionally ensure the config record matches a desired config record.
private void RemoveConfigImpl(string configPath, BaseConfigurationRecord configRecord)
{
if (!ConfigPathUtility.IsValid(configPath))
{
throw ExceptionUtil.ParameterInvalid("configPath");
}
string[] parts = ConfigPathUtility.GetParts(configPath);
BaseConfigurationRecord currentRecord;
// search under exclusive writer lock
try
{
int index;
AcquireHierarchyLockForWrite();
HlFindConfigRecord(parts, out index, out currentRecord);
// Return if not found, or does not match the one we are trying to remove.
if ((index != parts.Length) || ((configRecord != null) && !ReferenceEquals(configRecord, currentRecord)))
{
return;
}
// Remove it from the hierarchy.
currentRecord.Parent.HlRemoveChild(parts[parts.Length - 1]);
}
finally
{
ReleaseHierarchyLockForWrite();
}
OnConfigRemoved(new InternalConfigEventArgs(configPath));
// Close the record. This is safe to do outside the lock.
currentRecord.CloseRecursive();
}
public void IsValid(string configPath, bool expected)
{
Assert.Equal(expected, ConfigPathUtility.IsValid(configPath));
}
//
// Get the config record for a path.
// If the record does not exist, create it if it is needed.
//
public IInternalConfigRecord GetConfigRecord(string configPath)
{
if (!ConfigPathUtility.IsValid(configPath))
{
throw ExceptionUtil.ParameterInvalid("configPath");
}
string[] parts = ConfigPathUtility.GetParts(configPath);
//
// First search under the reader lock, so that multiple searches
// can proceed in parallel.
//
try {
int index;
BaseConfigurationRecord currentRecord;
AcquireHierarchyLockForRead();
hlFindConfigRecord(parts, out index, out currentRecord);
// check if found
if (index == parts.Length || !currentRecord.hlNeedsChildFor(parts[index]))
{
return(currentRecord);
}
}
finally {
ReleaseHierarchyLockForRead();
}
//
// Not found, so search again under exclusive writer lock so that
// we can create the record.
//
try {
int index;
BaseConfigurationRecord currentRecord;
AcquireHierarchyLockForWrite();
hlFindConfigRecord(parts, out index, out currentRecord);
if (index == parts.Length)
{
return(currentRecord);
}
string currentConfigPath = String.Join(BaseConfigurationRecord.ConfigPathSeparatorString, parts, 0, index);
//
// create new records
//
while (index < parts.Length && currentRecord.hlNeedsChildFor(parts[index]))
{
string configName = parts[index];
currentConfigPath = ConfigPathUtility.Combine(currentConfigPath, configName);
BaseConfigurationRecord childRecord;
Debug.Trace("ConfigurationCreate", "Creating config record for " + currentConfigPath);
if (_isDesignTime)
{
childRecord = MgmtConfigurationRecord.Create(this, currentRecord, currentConfigPath, null);
}
else
{
childRecord = (BaseConfigurationRecord)RuntimeConfigurationRecord.Create(this, currentRecord, currentConfigPath);
}
currentRecord.hlAddChild(configName, childRecord);
index++;
currentRecord = childRecord;
}
return(currentRecord);
}
finally {
ReleaseHierarchyLockForWrite();
}
}
// Example of configPath = "machine/webroot/1/fxtest/sub/foo.aspx"
// The configPath parameter must be lower case.
static private CachedPathData GetConfigPathData(string configPath)
{
Debug.Assert(ConfigPathUtility.IsValid(configPath), "ConfigPathUtility.IsValid(configPath)");
Debug.Assert(configPath == configPath.ToLower(CultureInfo.InvariantCulture), "configPath == configPath.ToLower(CultureInfo.InvariantCulture)");
bool exists = false;
bool isDirectory = false;
bool isRemovable = IsCachedPathDataRemovable(configPath);
// if the sliding expiration is zero, we won't cache it unless it is a configPath for root web.config or above
if (isRemovable && DoNotCacheUrlMetadata)
{
string pathSiteID = null;
VirtualPath virtualFilePath = null;
string physicalFilePath = null;
WebConfigurationHost.GetSiteIDAndVPathFromConfigPath(configPath, out pathSiteID, out virtualFilePath);
physicalFilePath = GetPhysicalPath(virtualFilePath);
string parentConfigPath = ConfigPathUtility.GetParent(configPath);
CachedPathData pathParentData = GetConfigPathData(parentConfigPath);
if (!String.IsNullOrEmpty(physicalFilePath))
{
FileUtil.PhysicalPathStatus(physicalFilePath, false, false, out exists, out isDirectory);
}
CachedPathData pathData = new CachedPathData(configPath, virtualFilePath, physicalFilePath, exists);
pathData.Init(pathParentData);
return(pathData);
}
//
// First, see if the CachedPathData is in the cache.
// we don't use Add for this lookup, as doing so requires
// creating a CacheDependency, which can be slow as it may hit
// the filesystem.
//
string key = CreateKey(configPath);
CacheStoreProvider cacheInternal = HttpRuntime.Cache.InternalCache;
CachedPathData data = (CachedPathData)cacheInternal.Get(key);
// if found, return the data
if (data != null)
{
data.WaitForInit();
return(data);
}
// WOS
bool cacheEntryIsNotRemovable = false;
// if not found, try to add it
string siteID = null;
VirtualPath virtualPath = null;
CachedPathData parentData = null;
CacheDependency dependency = null;
string physicalPath = null;
string[] fileDependencies = null;
string[] cacheItemDependencies = null;
if (WebConfigurationHost.IsMachineConfigPath(configPath))
{
cacheEntryIsNotRemovable = true;
}
else
{
// Make sure we have the parent data so we can create a dependency on the parent.
// The parent dependency will ensure that configuration data in the parent
// will be referenced by a cache hit on the child. (see UtcUpdateUsageRecursive in Cache.cs)
string parentConfigPath = ConfigPathUtility.GetParent(configPath);
parentData = GetConfigPathData(parentConfigPath);
string parentKey = CreateKey(parentConfigPath);
cacheItemDependencies = new string[1] {
parentKey
};
if (!WebConfigurationHost.IsVirtualPathConfigPath(configPath))
{
// assume hardcoded levels above the path, such as root web.config, exist
cacheEntryIsNotRemovable = true;
}
else
{
cacheEntryIsNotRemovable = !isRemovable;
WebConfigurationHost.GetSiteIDAndVPathFromConfigPath(configPath, out siteID, out virtualPath);
physicalPath = GetPhysicalPath(virtualPath);
// Add a dependency on the path itself, if it is a file,
// to handle the case where a file is deleted and replaced
// with a directory of the same name.
if (!String.IsNullOrEmpty(physicalPath))
{
FileUtil.PhysicalPathStatus(physicalPath, false, false, out exists, out isDirectory);
if (exists && !isDirectory)
{
fileDependencies = new string[1] {
physicalPath
};
}
}
}
try {
dependency = new CacheDependency(0, fileDependencies, cacheItemDependencies);
}
catch {
// CacheDependency ctor could fail because of bogus file path
// and it is ok not to watch those
}
}
// Try to add the CachedPathData to the cache.
CachedPathData dataAdd = null;
bool isDataCreator = false;
bool initCompleted = false;
CacheItemPriority priority = cacheEntryIsNotRemovable ? CacheItemPriority.NotRemovable : CacheItemPriority.Normal;
TimeSpan slidingExpiration = cacheEntryIsNotRemovable ? Cache.NoSlidingExpiration : UrlMetadataSlidingExpiration;
try {
using (dependency) {
dataAdd = new CachedPathData(configPath, virtualPath, physicalPath, exists);
try {
}
finally {
data = (CachedPathData)cacheInternal.Add(key, dataAdd, new CacheInsertOptions()
{
Dependencies = dependency,
SlidingExpiration = slidingExpiration,
Priority = priority,
OnRemovedCallback = s_callback
});
if (data == null)
{
isDataCreator = true;
}
}
}
// If another thread added it first, return the data
if (!isDataCreator)
{
data.WaitForInit();
return(data);
}
// This thread is the creator of the CachedPathData, initialize it
lock (dataAdd) {
try {
dataAdd.Init(parentData);
initCompleted = true;
}
finally {
// free waiters
dataAdd._flags[FInited] = true;
// Wake up waiters.
Monitor.PulseAll(dataAdd);
if (dataAdd._flags[FCloseNeeded])
{
// If we have received a call back to close, then lets
// make sure that our config object is cleaned up
dataAdd.Close();
}
}
}
}
finally {
// All the work in this finally block is for the case where we're the
// creator of the CachedPathData.
if (isDataCreator)
{
//
if (!dataAdd._flags[FInited])
{
lock (dataAdd) {
// free waiters
dataAdd._flags[FInited] = true;
// Wake up waiters.
Monitor.PulseAll(dataAdd);
if (dataAdd._flags[FCloseNeeded])
{
// If we have received a call back to close, then lets
// make sure that our config object is cleaned up
dataAdd.Close();
}
}
}
//
// Even though there is a try/catch handler surrounding the call to Init,
// a ThreadAbortException can still cause the handler to be bypassed.
//
// If there is an error, either a thread abort or an error in the config
// file itself, we do want to leave the item cached for a short period
// so that we do not revisit the error and potentially reparse the config file
// on every request.
//
// The reason we simply do not leave the item in the cache forever is that the
// problem that caused the configuration exception may be fixed without touching
// the config file in a way that causes a file change notification (for example, an
// acl change in a parent directory, or a change of path mapping in the metabase).
//
// NOTE: It is important to reinsert the item into the cache AFTER dropping
// the lock on dataAdd, in order to prevent the possibility of deadlock.
//
Debug.Assert(dataAdd._flags[FInited], "_flags[FInited]");
if (!initCompleted || (dataAdd.ConfigRecord != null && dataAdd.ConfigRecord.HasInitErrors))
{
//
// Create a new dependency object as the old one cannot be reused.
// Do not include a file dependency if initialization could not be completed,
// as invoking the file system could lead to further errors during a thread abort.
//
if (dependency != null)
{
if (!initCompleted)
{
dependency = new CacheDependency(0, null, cacheItemDependencies);
}
else
{
dependency = new CacheDependency(0, fileDependencies, cacheItemDependencies);
}
}
using (dependency) {
cacheInternal.Insert(key, dataAdd, new CacheInsertOptions()
{
Dependencies = dependency,
AbsoluteExpiration = DateTime.UtcNow.AddSeconds(5),
OnRemovedCallback = s_callback
});
}
}
}
}
return(dataAdd);
}