private Result Read(U8Span path, bool allowMissingMetaFile)
{
lock (Locker)
{
FileSystemClient fs = Server.GetFsClient();
Result rc = fs.OpenFile(out FileHandle handle, path, OpenMode.Read);
if (rc.IsFailure())
{
if (ResultFs.PathNotFound.Includes(rc))
{
if (allowMissingMetaFile)
{
Count = 0;
return(Result.Success);
}
return(ResultBcat.NotFound.LogConverted(rc));
}
return(rc);
}
try
{
Count = 0;
int header = 0;
// Verify the header value
rc = fs.ReadFile(out long bytesRead, handle, 0, SpanHelpers.AsByteSpan(ref header));
if (rc.IsFailure())
{
return(rc);
}
if (bytesRead != sizeof(int) || header != MetaFileHeaderValue)
{
return(ResultBcat.InvalidDeliveryCacheStorageFile.Log());
}
// Read all the directory entries
Span <byte> buffer = MemoryMarshal.Cast <DeliveryCacheDirectoryMetaEntry, byte>(Entries);
rc = fs.ReadFile(out bytesRead, handle, 4, buffer);
if (rc.IsFailure())
{
return(rc);
}
Count = (int)((uint)bytesRead / Unsafe.SizeOf <DeliveryCacheDirectoryMetaEntry>());
return(Result.Success);
}
finally
{
fs.CloseFile(handle);
}
}
}
public static Result CopyFileWithProgress(FileSystemClient fs, U8Span sourcePath, U8Span destPath, IProgressReport logger = null)
{
Result rc = fs.OpenFile(out FileHandle sourceHandle, sourcePath, OpenMode.Read);
if (rc.IsFailure())
{
return(rc);
}
try
{
rc = fs.OpenFile(out FileHandle destHandle, destPath, OpenMode.Write | OpenMode.AllowAppend);
if (rc.IsFailure())
{
return(rc);
}
try
{
const int maxBufferSize = 1024 * 1024;
rc = fs.GetFileSize(out long fileSize, sourceHandle);
if (rc.IsFailure())
{
return(rc);
}
int bufferSize = (int)Math.Min(maxBufferSize, fileSize);
byte[] buffer = ArrayPool <byte> .Shared.Rent(bufferSize);
try
{
for (long offset = 0; offset < fileSize; offset += bufferSize)
{
int toRead = (int)Math.Min(fileSize - offset, bufferSize);
Span <byte> buf = buffer.AsSpan(0, toRead);
rc = fs.ReadFile(out long _, sourceHandle, offset, buf);
if (rc.IsFailure())
{
return(rc);
}
rc = fs.WriteFile(destHandle, offset, buf, WriteOption.None);
if (rc.IsFailure())
{
return(rc);
}
logger?.ReportAdd(toRead);
}
}
finally
{
ArrayPool <byte> .Shared.Return(buffer);
}
rc = fs.FlushFile(destHandle);
if (rc.IsFailure())
{
return(rc);
}
}
finally
{
if (destHandle.IsValid)
{
fs.CloseFile(destHandle);
}
}
}
finally
{
if (sourceHandle.IsValid)
{
fs.CloseFile(sourceHandle);
}
}
return(Result.Success);
}
