}

	pr, pw := xioutil.WaitPipe()
	go func() {
		pw.CloseWithError(er.getObjectWithFileInfo(ctx, bucket, object, off, length, pw, fi, metaArr, onlineDisks))
	}()

	// Cleanup function to cause the go routine above to exit, in
	// case of incomplete read.
	pipeCloser := func() {
		pr.CloseWithError(nil)
	}

	if !unlockOnDefer {
		return fn(pr, h, pipeCloser, nsUnlocker)
	}

	return fn(pr, h, pipeCloser)

		// to error out if source and destination are same.
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrInvalidCopyDest), r.URL)
		return
	}

	// After we've checked for an invalid copy (above), if a server-side checksum type
	// is requested, we need to read the source to recompute the checksum.
	if dstOpts.WantServerSideChecksumType.IsSet() {
		srcInfo.metadataOnly = false
	}

	// Federation only.