private void OnDownloadProcessing(HTTPRequest request, HTTPResponse response)
    {
        Debug.Assert(response != null);
        Debug.Log("Processing request from " + request.Uri.AbsoluteUri);
        RemoteFileFragmentMetadata fragmentMetadata =
            m_RemoteFileMetadata.GetFileFragmentDataFromUri(request.Uri.AbsoluteUri);

        Debug.Log("Fragment index: " + fragmentMetadata.index);

        lock (fragmentMetadata) {
            if (!response.HasStreamedFragments())
            {
                return;
            }
            List <byte[]> fragmentBytesList = response.GetStreamedFragments();

            //if (lastDownloadedURI == request.Uri.AbsoluteUri) {
            //	Debug.LogWarning("Download callback called twice in a row -- ignoring the second one");
            //	return;
            //}
            if (fragmentBytesList == null)
            {
                return;
            }

            for (int i = 0; i < fragmentBytesList.Count; ++i)
            {
                byte[] fragmentBytes = fragmentBytesList[i];
                int    offset        =
                    m_RemoteFileMetadata.GetFileFragmentMemoryOffset(fragmentMetadata)
                    + (int)fragmentMetadata.GetDownloadedBytes();
                int length = fragmentBytes.Length;

                Debug.Log("Copying " + length + " bytes at offset " + offset);
                CopyDownloadedFragment(offset, length, ref fragmentBytes);
                fragmentMetadata.AddDownloadedBytes(length);
                Interlocked.Add(ref mDownloadedContentSize, length);
                Debug.Log("Downloaded content size: " + mDownloadedContentSize + " / " + mContentSize);
            }

            fragmentMetadata.ProcessGetResponse(response);
        }
        lastDownloadedURI = request.Uri.AbsoluteUri;         // for error checking
    }