private void MoveUpdatedIndexToFinalLocation(bool shouldSignIndex)
{
if (shouldSignIndex)
{
using (ITracer activity = this.tracer.StartActivity("SignIndex", EventLevel.Informational, Keywords.Telemetry, metadata: null))
{
using (FileStream fs = File.Open(this.updatedIndexPath, FileMode.Open, FileAccess.ReadWrite))
{
// Truncate the old hash off. The Index class is expected to preserve any existing hash.
fs.SetLength(fs.Length - 20);
using (HashingStream hashStream = new HashingStream(fs))
{
fs.Position = 0;
hashStream.CopyTo(Stream.Null);
byte[] hash = hashStream.Hash;
// The fs pointer is now where the old hash used to be. Perfect. :)
fs.Write(hash, 0, hash.Length);
}
}
}
}
this.tracer.RelatedEvent(EventLevel.Informational, "MoveUpdatedIndexToFinalLocation", new EventMetadata() { { "UpdatedIndex", this.updatedIndexPath }, { "Index", this.indexPath } });
File.Delete(this.indexPath);
File.Move(this.updatedIndexPath, this.indexPath);
this.WriteFastFetchIndexVersionMarker();
}
private void SignIndex()
{
using (ITracer activity = this.tracer.StartActivity("SignIndex", EventLevel.Informational, Keywords.Telemetry, metadata: null))
{
using (FileStream fs = File.Open(this.indexPath, FileMode.Open, FileAccess.ReadWrite))
{
// Truncate the old hash off. The Index class is expected to preserve any existing hash.
fs.SetLength(fs.Length - 20);
using (HashingStream hashStream = new HashingStream(fs))
{
fs.Position = 0;
hashStream.CopyTo(Stream.Null);
byte[] hash = hashStream.Hash;
// The fs pointer is now where the old hash used to be. Perfect. :)
fs.Write(hash, 0, hash.Length);
}
}
}
}