private void ifUnmodifiedSince(DavRequest request, DavResponse response, DavResource resource)
throws DavException, IOException {
if (resource == null) return;
long mod = resource.getModificationTime();
if (mod == -1) return;
mod = mod / 1000 * 1000;
long since = request.getDateHeader("If-Unmodified-Since");
if (since == -1) return;
if (mod <= since) return;
throw new PreconditionFailedException("If-Unmodified-Since disallows conditional request");
}
private void ifModifiedSince(DavRequest request, DavResponse response, DavResource resource)
throws DavException, IOException {
if (resource == null) return;
long mod = resource.getModificationTime();
if (mod == -1) return;
mod = mod / 1000 * 1000;
long since = request.getDateHeader("If-Modified-Since");
if (since == -1) return;
if (mod > since) return;
throw new NotModifiedException();
}