# File lib/rbot/core/utils/httputil.rb, line 609
  def head(uri, options = {}, &block) # :yields: resp
    opts = {:method => :head}.merge(options)
    begin
      resp = get_response(uri, opts, &block)
      # raise "http error #{resp}" if Net::HTTPClientError === resp ||
      #   Net::HTTPServerError == resp
      return resp
    rescue Exception => e
      error e
    end
    return nil
  end