public static void ComputeHash(string path, ref byte[] hash)
{
var b = new ComputeHashParams {
};
b.Hash = "sha256";
b.Path = path;
using (MemoryStream ms = new MemoryStream())
{
b.WriteTo(ms);
CodecDll.ComputeHash(ms.GetBuffer(), (uint)ms.Length, hash, (uint)hash.Length);
}
}
public bool PushFile(string src, string dest, bool force)
{
if (dest == null || dest.Length == 0)
{
dest = Path.GetFileName(src);
}
DirEntry de;
FileInfo fi = new FileInfo(src);
bool exists = TryGetEntry(dest, out de);
if (exists)
{
bool changeDetected = force;
if (!changeDetected)
{
VersionEntry ve = de.Versions[de.Latest];
// Compare the file time
if (fi.LastWriteTimeUtc.Ticks > ve.LastWriteTime)
{
// Compare the size
if ((ulong)fi.Length != ve.Length)
{
changeDetected = true;
}
else if (_context.UseChecksums)
{
// Checksum check
byte[] sha256 = new byte[32];
ComputeHashParams bb = new ComputeHashParams {
};
bb.Hash = "sha256";
bb.Path = src;
using (MemoryStream ms = new MemoryStream())
{
bb.WriteTo(ms);
CodecDll.ComputeHash(ms.GetBuffer(), (uint)ms.Length, sha256, (uint)sha256.Length);
}
// Compare the hash
changeDetected = !sha256.SequenceEqual(ve.Checksum);
}
if (!changeDetected)
{
// Update the timestamp only
de.Versions[de.Latest].LastWriteTime = fi.LastWriteTimeUtc.Ticks;
return(true);
}
}
}
if (!changeDetected)
{
return(false);
}
}
else
{
de = new DirEntry {
Type = DirEntryType.File, Latest = 0
};
AddEntry(dest, de);
}
VersionEntry versionToRemove = null;
// Encode the file to a temp location
using (var lp = new LocalPath(LocalUtils.GetTempFileName()))
{
var hash = new byte[32];
CodecHelper.EncodeFile(ref _context, src, lp.Path, ref hash);
var newVersionEntry = new VersionEntry
{
Uuid = Guid.NewGuid().ToString("N"),
LastWriteTime = fi.LastWriteTimeUtc.Ticks,
LastAccessTime = fi.LastAccessTimeUtc.Ticks,
CreationTime = fi.CreationTimeUtc.Ticks,
Attributes = (int)fi.Attributes,
Length = (ulong)fi.Length
};
newVersionEntry.Checksum = ByteString.CopyFrom(hash);
if (de.Versions.Count == 0)
{
// The very first version addition
de.Versions.Add(newVersionEntry);
Debug.Assert(de.Latest == 0);
}
else if (de.Versions.Count > 0 && de.Versions.Count >= _context.RepoCfg.MaxVersions)
{
de.Latest = (de.Latest + 1) % _context.RepoCfg.MaxVersions;
versionToRemove = de.Versions[de.Latest];
de.Versions[de.Latest] = newVersionEntry;
}
else
{
de.Versions.Add(newVersionEntry);
++de.Latest;
}
// The in-memory directory is updated, perform the file operations
FileId fid = new FileId(newVersionEntry.Uuid);
_context.Storage.CreateDirectory(fid.DirectoryPath);
_context.Storage.Upload(lp.Path, fid.FullPath);
}
// Remove the previous version if necessary
if (versionToRemove != null)
{
_context.Storage.RemoveFile((new FileId(versionToRemove.Uuid)).FullPath);
}
Write();
return(true);
}