///<inheritdoc>
public async Task UnlockAsync()
{
if (MsOfficeHelper.IsMsOfficeLocked(UserFileSystemPath)) // Required for PowerPoint. It does not block the for writing.
{
throw new ClientLockFailedException("The file is blocked for writing.");
}
ExternalDataManager customDataManager = Engine.CustomDataManager(UserFileSystemPath, Logger);
LockManager lockManager = customDataManager.LockManager;
// Set pending icon, so the user has a feedback as unlock operation may take some time.
await customDataManager.SetLockPendingIconAsync(true);
// Read lock-token from lock-info file.
string lockToken = (await lockManager.GetLockInfoAsync()).LockToken;
// Unlock the item in the remote storage.
try
{
await Program.DavClient.UnlockAsync(new Uri(RemoteStoragePath), lockToken);
}
catch (ITHit.WebDAV.Client.Exceptions.ConflictException)
{
// The item is already unlocked.
}
// Delete lock-mode and lock-token info.
lockManager.DeleteLock();
// Remove lock icon and lock info in custom columns.
await customDataManager.SetLockInfoAsync(null);
Logger.LogMessage("Unlocked in the remote storage succesefully", UserFileSystemPath);
}
/// <inheritdoc/>
public async Task WriteAsync(IFileMetadata fileMetadata, Stream content = null)
{
if (MsOfficeHelper.IsMsOfficeLocked(UserFileSystemPath)) // Required for PowerPoint. It does not block the for writing.
{
throw new ClientLockFailedException("The file is blocked for writing.");
}
Logger.LogMessage($"{nameof(IFile)}.{nameof(WriteAsync)}()", UserFileSystemPath);
ExternalDataManager customDataManager = Engine.CustomDataManager(UserFileSystemPath);
// Send the ETag to the server as part of the update to ensure the file in the remote storge is not modified since last read.
string oldEtag = await customDataManager.ETagManager.GetETagAsync();
// Send the lock-token to the server as part of the update.
string lockToken = (await customDataManager.LockManager.GetLockInfoAsync())?.LockToken;
if (content != null)
{
long contentLength = content != null ? content.Length : 0;
IWebRequestAsync request = await Program.DavClient.GetFileWriteRequestAsync(
new Uri(RemoteStoragePath), null, contentLength, 0, -1, lockToken, oldEtag);
// Update remote storage file content.
using (Stream davContentStream = await request.GetRequestStreamAsync())
{
if (content != null)
{
await content.CopyToAsync(davContentStream);
}
// Get the new ETag returned by the server (if any).
IWebResponseAsync response = await request.GetResponseAsync();
string eTagNew = response.Headers["ETag"];
response.Close();
// Store ETag unlil the next update.
// This will also mark the item as not new, which is required for correct MS Office saving opertions.
await customDataManager.ETagManager.SetETagAsync(eTagNew);
// Update ETag in custom column displayed in file manager.
await customDataManager.SetCustomColumnsAsync(new[] { new FileSystemItemPropertyData((int)CustomColumnIds.ETag, eTagNew) });
}
}
}