Ruby Net::FTP Implicit TLS

implicit_tls_ftp.rb

# Assumes a recent version of ruby with TLS and Explicit TLS support
class ImplicitTlsFTP < Net::FTP
  FTP_PORT = 990

  def connect(host, port = FTP_PORT)
    synchronize do
      @host = host
      @bare_sock = open_socket(host, port)
      begin
        ssl_sock = start_tls_session(Socket.tcp(host, port))
        @sock = BufferedSSLSocket.new(ssl_sock, read_timeout: @read_timeout)
        voidresp
        if @private_data_connection
          voidcmd("PBSZ 0")
          voidcmd("PROT P")
        end
      rescue OpenSSL::SSL::SSLError, Net::OpenTimeout
        @sock.close
        raise
      end
    end
  end
end

ImplicitTlsFTP.open(host, ssl: true)

thats really helpfull, somehow still in 2024 some ftp servers with implicit tls timeout any request in nonSSL socker, thats why default voidresp hangs out (in common net/ftp connect it goes beforre begin)