/// <summary>
/// Audits a request for the file system's root folder.
/// </summary>
public static void AuditRootFolderRequest(IAuditor auditor, IVirtualFolderItem rootFolder)
{
if (!AuditHelper.IsInfoEnabledFor(auditor, FileSystemTask.RootFolderInfoRequest))
{
return;
}
const string msg = "File system root requested.";
auditor.Audit(AuditLevel.Info, FileSystemTask.RootFolderInfoRequest, AuditEvent.FolderInfoRequested, msg);
}
/// <summary>
/// Audits an attempt to delete the root folder.
/// </summary>
public static void AuditDeleteRootAttempt(IAuditor auditor, IVirtualFolderItem folder)
{
if (!AuditHelper.IsWarnEnabledFor(auditor, FileSystemTask.FolderDeleteRequest))
{
return;
}
string msg = String.Format("Blocked attempt to delete root folder.\n\n{0}", AuditHelper.CreateResourceInfoString(folder));
auditor.Audit(AuditLevel.Warning, FileSystemTask.FolderDeleteRequest, AuditEvent.DeleteFileSystemRoot, msg);
}
/// <summary>
/// Audits a request for a folder that was not found on the file system.
/// </summary>
public static void AuditRequestedFolderNotFound(IAuditor auditor, IVirtualFolderItem folder, FileSystemTask context)
{
if (!AuditHelper.IsWarnEnabledFor(auditor, context))
{
return;
}
string msg = "Could not handle request for folder [{0}] - the folder was not found on the file system.\n\n{1}";
msg = String.Format(msg, folder.ResourceInfo.Name, AuditHelper.CreateResourceInfoString(folder));
auditor.Audit(AuditLevel.Warning, context, AuditEvent.FolderNotFound, msg);
}
/// <summary>
/// Audits a request for the file system's root folder.
/// </summary>
public static void AuditInvalidRootParentRequest(IAuditor auditor, IVirtualFolderItem childFolder)
{
if (!AuditHelper.IsWarnEnabledFor(auditor, FileSystemTask.FolderParentRequest))
{
return;
}
string msg = "Parent folder request for file system root was blocked. Submitted folder:\n{0}";
msg = String.Format(msg, AuditHelper.CreateResourceInfoString(childFolder));
auditor.Audit(AuditLevel.Warning, FileSystemTask.FolderParentRequest, AuditEvent.FolderInfoRequested, msg);
}
/// <summary>
/// Audits a request for the file system's root folder.
/// </summary>
public static void AuditFolderParentRequest(IAuditor auditor, IVirtualFolderItem childFolder, IVirtualFolderItem parentFolder)
{
if (!AuditHelper.IsInfoEnabledFor(auditor, FileSystemTask.FolderParentRequest))
{
return;
}
string msg = "Parent folder of folder [{0}] was requested.\nSubmitted folder:\n{1}\n\nParent folder:\n{2}";
msg = String.Format(msg, childFolder.ResourceInfo.Name, AuditHelper.CreateResourceInfoString(childFolder),
AuditHelper.CreateResourceInfoString(parentFolder));
auditor.Audit(AuditLevel.Info, FileSystemTask.FolderParentRequest, AuditEvent.FolderInfoRequested, msg);
}
/// <summary>
/// Audits that a folder was created on the file system.
/// </summary>
public static void AuditFolderCreation(IAuditor auditor, IVirtualFolderItem folder)
{
const FileSystemTask context = FileSystemTask.FolderCreateRequest;
if (!AuditHelper.IsInfoEnabledFor(auditor, context))
{
return;
}
string msg = "Created folder [{0}] on the file system.\n\n{1}";
msg = String.Format(msg, folder.ResourceInfo.Name, AuditHelper.CreateResourceInfoString(folder));
auditor.Audit(AuditLevel.Info, context, AuditEvent.FolderCreated, msg);
}
/// <summary>
/// Audits a request for a given folder's meta data (e.g. through <see cref="IFileSystemProvider.GetFolderInfo"/>.
/// Be aware that this might cause verbose audit trails.
/// </summary>
public static void AuditFolderInfoRequest(IAuditor auditor, FileSystemTask context, IVirtualFolderItem folder)
{
if (!AuditHelper.IsInfoEnabledFor(auditor, context))
{
return;
}
string msg = String.Format("Folder information requested:\n{0}", AuditHelper.CreateResourceInfoString(folder));
auditor.Audit(AuditLevel.Info, context, AuditEvent.FolderInfoRequested, msg);
}
/// <summary>
/// Gets authorization claims for a given folder resource.
/// </summary>
/// <param name="folderItem">The currently processed folder.</param>
/// <returns>The requesting party's permissions for the
/// submitted <paramref name="folderItem"/>.</returns>
public FolderClaims GetFolderClaims(IVirtualFolderItem folderItem)
{
return(FolderClaims.CreatePermissive());
}
/// <summary>
/// Copies a physical folder on the file system from one location to the other. This
/// method is invoked by <see cref="FileSystemProviderBase2{TFile,TFolder}.CopyFolder(string,string)"/>.
/// </summary>
/// <param name="sourceFolder">The folder to be copied.</param>
/// <param name="targetFolder">The designated location of the copy.</param>
protected override void CopyFolderOnFileSystem(IVirtualFolderItem sourceFolder, IVirtualFolderItem targetFolder)
{
CopyFolderOnFileSystem2(sourceFolder as FolderItem, targetFolder as FolderItem);
}
/// <summary>
/// This method is invoked by <see cref="FileSystemProviderBase2{TFile,TFolder}.CreateFolder(string)"/> in order
/// to handle the creation of a physical folder on the file system.
/// </summary>
/// <param name="folder">Describes the (currently unavailable folder).</param>
/// <returns>Either the updated <paramref name="folder"/> reference that
/// was submitted, or a new <see cref="FolderItem"/> that represents the
/// created folder.</returns>
protected override IVirtualFolderItem CreateFolderOnFileSystem(IVirtualFolderItem folder)
{
return(CreateFolderOnFileSystem2(folder as FolderItem));
}
/// <summary>
/// Gets authorization claims for a given folder resource.
/// </summary>
/// <param name="folderItem">The currently processed folder.</param>
/// <returns>The requesting party's permissions for the
/// submitted <paramref name="folderItem"/>.</returns>
public FolderClaims GetFolderClaims(IVirtualFolderItem folderItem)
{
return FolderClaims.CreatePermissive();
}
/// <summary>
/// Gets authorization claims for a given folder resource.
/// </summary>
/// <param name="folderItem">The currently processed folder.</param>
/// <returns>The requesting party's permissions for the
/// submitted <paramref name="folderItem"/>.</returns>
public FolderClaims GetFolderClaims(IVirtualFolderItem folderItem)
{
throw new NotImplementedException(""); //TODO provide implementation
}
/// <summary>
/// Audits a request for a folder's files and sub folders.
/// </summary>
public static void AuditFolderContentsRequest(this IAuditor auditor, FileSystemTask context, IVirtualFolderItem parentFolder)
{
if (!auditor.IsInfoEnabledFor(context))
{
return;
}
string msg = "Delivered contents of folder [{0}]. Folder details:\n\n{1}";
msg = String.Format(msg, parentFolder.ResourceInfo.Name, parentFolder.CreateResourceInfoString());
auditor.Audit(AuditLevel.Info, context, AuditEvent.FolderContentsRequested, msg);
}
/// <summary>
/// Audits a request for the file system's root folder.
/// </summary>
public static void AuditFileParentRequest(this IAuditor auditor, IVirtualFileItem childFile, IVirtualFolderItem parentFolder)
{
if (!auditor.IsInfoEnabledFor(FileSystemTask.FileParentRequest))
{
return;
}
string msg = "Parent folder of file [{0}] was requested.\nSubmitted file:\n{1}\n\nParent folder:\n{2}";
msg = String.Format(msg, childFile.ResourceInfo.Name, childFile.CreateResourceInfoString(),
parentFolder.CreateResourceInfoString());
auditor.Audit(AuditLevel.Info, FileSystemTask.FileParentRequest, AuditEvent.FolderInfoRequested, msg);
}
/// <summary> /// Resolves all child files of a given parent folder. This method is invoked /// by the <see cref="GetChildFiles"/> method in order to resolve the /// qualified paths of all files within that folder, which can be used in order to /// create <see cref="VirtualFileInfo"/> instances based on the returned paths. /// </summary> /// <param name="parentFolder">The currently processed folder.</param> /// <returns>File paths that can be resolved to the files withing the submitted /// <paramref name="parentFolder"/>.</returns> protected abstract IEnumerable<string> GetChildFilePathsInternal(IVirtualFolderItem parentFolder);
/// <summary> /// Gets all resources that need to be read-locked (and thus write-protected) /// in order to savely access a given folder. With hierarchical folder systems, /// these are usually the parent folders of the folder, because deleting, /// moving, or renaming the folder would cause folder access issues if the /// folder is still accessed). /// </summary> /// <param name="folder">The currently processed folder.</param> /// <returns>All resources that need to be write-protected in order to /// process the folder.</returns> protected abstract List<string> GetResourceLockChain(IVirtualFolderItem folder);
/// <summary>
/// Tries to acquire a lock for a given folder and its parent folders,
/// and executes the submitted <paramref name="action"/> if the lock
/// was granted. Otherwise audits a warning.
/// </summary>
/// <param name="folder">The folder to be locked.</param>
/// <param name="context">The currently performed file system operation.</param>
/// <param name="lockType">Whether a read or a write lock is required for the
/// <paramref name="folder"/>.</param>
/// <param name="action">An action that is being executed if the locking
/// succeeded.</param>
/// <returns>True if locking succeeded and the <paramref name="action"/> was invoked. False
/// if the lock was not granted.</returns>
protected virtual bool LockResourceAndExecute(IVirtualFolderItem folder, FileSystemTask context, ResourceLockType lockType, Action action)
{
using (var guard = RequestChainedLockGuard(folder, lockType))
{
if (!guard.IsLockEnabled)
{
AuditEvent ae = lockType == ResourceLockType.Read
? AuditEvent.FolderReadLockDenied
: AuditEvent.FolderWriteLockDenied;
AuditHelper.AuditDeniedOperation(Auditor,context, ae, folder);
return false;
}
action();
return true;
}
}
/// <summary>
/// Creates a <see cref="ResourceLockGuard"/> that encapsulates
/// a read or write lock for a given folder as well as read locks
/// for all its parent folders.
/// </summary>
/// <param name="folder">The folder to be locked.</param>
/// <param name="lockType">Whether a read or a write lock is being
/// required for the <paramref name="folder"/>.</param>
/// <returns>A guard which releases folder resource and all folders once it is being disposed.
/// If locking did not succeed because an element in the chain could not be locked,
/// the returned <see cref="ResourceLockGuard.IsLockEnabled"/> property
/// is false.</returns>
protected virtual ResourceLockGuard RequestChainedLockGuard(IVirtualFolderItem folder, ResourceLockType lockType)
{
List<string> parentFolders = GetResourceLockChain(folder);
switch (lockType)
{
case ResourceLockType.Read:
return LockRepository.GetResourceChainLock(folder.QualifiedIdentifier, false, parentFolders);
case ResourceLockType.Write:
return LockRepository.GetResourceChainLock(folder.QualifiedIdentifier, true, parentFolders);
default:
throw new ArgumentOutOfRangeException("lockType", "Unknown lock type: " + lockType);
}
}
/// <summary>
/// Gets authorization claims for a given folder resource.
/// </summary>
/// <param name="folderItem">The currently processed folder.</param>
/// <returns>The requesting party's permissions for the
/// submitted <paramref name="folderItem"/>.</returns>
public FolderClaims GetFolderClaims(IVirtualFolderItem folderItem)
{
return(FolderClaimsResolverFunc == null ? null : FolderClaimsResolverFunc(folderItem));
}
/// <summary> /// This method is invoked by <see cref="CreateFolder"/> in order /// to handle the creation of a physical folder on the file system. /// </summary> /// <param name="folder">Describes the (currently unavailable folder).</param> /// <returns>Either the updated <paramref name="folder"/> reference that /// was submitted, or a new <see cref="TFolder"/> that represents the /// created folder.</returns> protected abstract IVirtualFolderItem CreateFolderOnFileSystem(IVirtualFolderItem folder);
protected override void MoveFolderOnFileSystem(IVirtualFolderItem sourceFolder, IVirtualFolderItem targetFolder)
{
MoveFolderOnFileSystem2(sourceFolder as ZipFolderItem, targetFolder as ZipFolderItem);
}
/// <summary>
/// Audits a denied request for a folder's contents.
/// </summary>
public static void AuditDeniedFolderContentsRequest(IAuditor auditor, FileSystemTask context, IVirtualFolderItem parentFolder)
{
if (!AuditHelper.IsWarnEnabledFor(auditor, context))
{
return;
}
string msg = "Denied access to contents of folder [{0}]. Folder details:\n\n{1}";
msg = String.Format(msg, parentFolder.ResourceInfo.Name, AuditHelper.CreateResourceInfoString(parentFolder));
auditor.Audit(AuditLevel.Warning, context, AuditEvent.ListFolderContentsDenied, msg);
}
/// <summary> /// Physically deletes a given folder on the file system. This method is /// being invoked by the <see cref="DeleteFolder"/> method. /// </summary> /// <param name="folder">The folder to be deleted.</param> protected abstract void DeleteFolderOnFileSystem(IVirtualFolderItem folder);
/// <summary> /// Moves a physical folder on the file system from one location to the other. This /// method is invoked by <see cref="MoveFolder"/>. /// </summary> /// <param name="sourceFolder">The folder to be copied.</param> /// <param name="targetFolder">The designated new location of the folder.</param> protected abstract void MoveFolderOnFileSystem(IVirtualFolderItem sourceFolder, IVirtualFolderItem targetFolder);
protected override IEnumerable<string> GetChildFilePathsInternal(IVirtualFolderItem parentFolder) {
return GetChildFilePathsInternal2(parentFolder as ZipFolderItem);
}
public static void AuditDeniedFolderCreation(IAuditor auditor, AuditEvent eventId, IVirtualFolderItem folder)
{
if (!AuditHelper.IsWarnEnabledFor(auditor, FileSystemTask.FolderCreateRequest))
{
return;
}
string msg = String.Format("Blocked attempt to create folder on file system. Folder information:\n{0}", AuditHelper.CreateResourceInfoString(folder));
auditor.Audit(AuditLevel.Warning, FileSystemTask.FolderCreateRequest, eventId, msg);
}
protected override IVirtualFolderItem CreateFolderOnFileSystem(IVirtualFolderItem folder) {
return CreateFolderOnFileSystem2(folder as ZipFolderItem);
}
/// <summary>
/// Gets authorization claims for a given folder resource.
/// </summary>
/// <param name="folderItem">The currently processed folder.</param>
/// <returns>The requesting party's permissions for the
/// submitted <paramref name="folderItem"/>.</returns>
public FolderClaims GetFolderClaims(IVirtualFolderItem folderItem)
{
throw new NotImplementedException(""); //TODO provide implementation
}
protected override void DeleteFolderOnFileSystem(IVirtualFolderItem folder) {
DeleteFolderOnFileSystem2(folder as ZipFolderItem);
}
/// <summary>
/// Resolves all child files of a given parent folder. This method is invoked
/// by the <see cref="FileSystemProviderBase2{TFile,TFolder}.GetChildFiles(string)"/> method in order to resolve the
/// qualified paths of all files within that folder, which can be used in order to
/// create <see cref="VirtualFileInfo"/> instances based on the returned paths.
/// </summary>
/// <param name="parentFolder">The currently processed folder.</param>
/// <returns>File paths that can be resolved to the files withing the submitted
/// <paramref name="parentFolder"/>.</returns>
protected override IEnumerable <string> GetChildFilePathsInternal(IVirtualFolderItem parentFolder)
{
return(GetChildFilePathsInternal2(parentFolder as FolderItem));
}
/// <summary>
/// Copies a physical folder on the file system from one location to the other. This
/// method is invoked by <see cref="FileSystemProviderBase2{TFile,TFolder}.CopyFolder(string,string)"/>.
/// </summary>
/// <param name="sourceFolder">The folder to be copied.</param>
/// <param name="targetFolder">The designated location of the copy.</param>
protected override void CopyFolderOnFileSystem(IVirtualFolderItem sourceFolder, IVirtualFolderItem targetFolder) {
CopyFolderOnFileSystem2(sourceFolder as ZipFolderItem, targetFolder as ZipFolderItem);
}
/// <summary>
/// Physically deletes a given folder on the file system. This method is
/// being invoked by the <see cref="FileSystemProviderBase2{TFile,TFolder}.DeleteFolder"/> method.
/// </summary>
/// <param name="folder">The folder to be deleted.</param>
protected override void DeleteFolderOnFileSystem(IVirtualFolderItem folder)
{
DeleteFolderOnFileSystem2(folder as FolderItem);
}
/// <summary>
/// Gets all resources that need to be read-locked (and thus write-protected)
/// in order to savely access a given folder. With hierarchical folder systems,
/// these are usually the parent folders of the folder, because deleting,
/// moving, or renaming the folder would cause folder access issues if the
/// folder is still accessed).
/// </summary>
/// <param name="folder">The currently processed folder.</param>
/// <returns>All resources that need to be write-protected in order to
/// process the folder.</returns>
protected override List<string> GetResourceLockChain(IVirtualFolderItem folder) {
return GetResourceLockChain2(folder as ZipFolderItem);
}
/// <summary>
/// Gets all resources that need to be read-locked (and thus write-protected)
/// in order to savely access a given folder. With hierarchical folder systems,
/// these are usually the parent folders of the folder, because deleting,
/// moving, or renaming the folder would cause folder access issues if the
/// folder is still accessed).
/// </summary>
/// <param name="folder">The currently processed folder.</param>
/// <returns>All resources that need to be write-protected in order to
/// process the folder.</returns>
protected override List <string> GetResourceLockChain(IVirtualFolderItem folder)
{
return(GetResourceLockChain2(folder as FolderItem));
}
/// <summary>
/// Moves a physical folder on the file system from one location to the other. This
/// method is invoked by <see cref="FileSystemProviderBase2{TFile,TFolder}.MoveFolder(string,string)"/>.
/// </summary>
/// <param name="sourceFolder">The folder to be copied.</param>
/// <param name="targetFolder">The designated new location of the folder.</param>
/// <returns>Either the updated <paramref name="targetFolder"/> instance, or a new
/// <see cref="FolderItem"/> instance that represents the created target folder.</returns>
protected override void MoveFolderOnFileSystem(IVirtualFolderItem sourceFolder, IVirtualFolderItem targetFolder) {
MoveFolderOnFileSystem2(sourceFolder as FolderItem,targetFolder as FolderItem);
}