def store_location
  session[:return_to] = request.request_uri
end

def redirect_back_or_default(default)
  redirect_to(session[:return_to] || default)
  session[:return_to] = nil
end

def some_method
  redirect_to :back
rescue ActionController::RedirectBackError
  redirect_to root_path
end

def redirect_to_back(default = root_url)
    if !request.env["HTTP_REFERER"].blank? and request.env["HTTP_REFERER"] != request.env["REQUEST_URI"]
      redirect_to :back
    else
      redirect_to default
    end
  end