#pragma warning disable RECS0154 // Parameter is never used
public async Task <IBlockStream> OpenFile(string filePath, FileMode mode, FileAccess fileAccess, FileShare share, FileOptions options)
#pragma warning restore RECS0154 // Parameter is never used
{
var item = await FetchNode(filePath);
if (fileAccess == FileAccess.Read)
{
if (item == null)
{
return(null);
}
Log.Trace($"Opening {filePath} for Read");
if (!item.IsUploading && item.Length < SmallFileSizeLimit)
{
return(SmallFilesCache.OpenReadWithDownload(item));
}
var result = SmallFilesCache.OpenReadCachedOnly(item);
if (result != null)
{
return(result);
}
await WaitForReal(item, 25000);
await onStatisticsUpdated(cloud, StatisticUpdateReason.DownloadAdded, new DownloadStatisticInfo(item));
var buffered = new BufferedHttpCloudBlockReader(item, cloud);
buffered.OnClose = async() =>
{
await onStatisticsUpdated(cloud, StatisticUpdateReason.DownloadFinished, new DownloadStatisticInfo(item));
};
return(buffered);
}
if (item == null || item.Length == 0)
{
Log.Trace($"Creating {filePath} as New because mode:{mode} and {((item == null) ? "item is null" : "length is 0")}");
var dir = Path.GetDirectoryName(filePath);
var name = Path.GetFileName(filePath);
var dirItem = await FetchNode(dir);
item = FSItem.MakeUploading(filePath, Guid.NewGuid().ToString(), dirItem.Id, 0);
var file = UploadService.OpenNew(item);
SmallFilesCache.AddAsLink(item, file.UploadCachePath);
itemsTreeCache.Add(item);
return(file);
}
if (item == null)
{
return(null);
}
await WaitForReal(item, 25000);
if ((mode == FileMode.Create || mode == FileMode.Truncate) && item.Length > 0)
{
Log.Trace($"Opening {filePath} as Truncate because mode:{mode} and length {item.Length}");
item.Length = 0;
SmallFilesCache.Delete(item);
item.MakeUploading();
var file = UploadService.OpenTruncate(item);
return(file);
}
if (mode == FileMode.Open || mode == FileMode.Append || mode == FileMode.OpenOrCreate)
{
Log.Trace($"Opening {filePath} as ReadWrite because mode:{mode} and length {item.Length}");
if (item.Length < SmallFileSizeLimit)
{
var file = SmallFilesCache.OpenReadWrite(item);
file.OnChangedAndClosed = async(it, path) =>
{
it.LastWriteTime = DateTime.UtcNow;
if (!it.IsUploading)
{
it.MakeUploading();
var olditemPath = Path.Combine(SmallFilesCache.CachePath, item.Id);
var newitemPath = Path.Combine(UploadService.CachePath, item.Id);
if (File.Exists(newitemPath))
{
File.Delete(newitemPath);
}
HardLink.Create(olditemPath, newitemPath);
SmallFilesCache.AddExisting(it);
}
await UploadService.AddOverwrite(it);
};
return(file);
}
Log.Warn("File is too big for ReadWrite: " + filePath);
}
return(null);
}
public void AddAsLink(FSItem item, string path)
{
Directory.CreateDirectory(cachePath);
HardLink.Create(path, Path.Combine(cachePath, item.Id));
AddExisting(item);
}