LED Ticker Tape - CGI Example

One new parameter (which actually was a hidden parameter), interval, specifies how many times the ticker should scroll its text before it should go to reload the text from the server. The default is to never reload from the server. Nothing has changed in Ticker Tape since it was released in september under the new name conveyor.class so you will not need to download the applets again if you already have.

The other parameter has always been in Ticker Tape and is the file parameter.

In order for the reload to work, you must specify a CGI as the file parameter, and that CGI must tell the browser not to cache the text.

This is an example of a dynamic Ticker Tape which just keeps reloading a small CGI from my server. Please don't stay here long because it will overload my server!

If it does not work right away with your browser. Try pressing the reload button.

  #!/usr/local/bin/perl
  #
  # Usual header stuff needed by the httpd server
  # Note the two return characters after the no-cache line
  #
  print "Content-type: text/plain\n";
  print "Pragma: no-cache\n\n";

  #
  # Some simple "dynamic" information
  #
  @gmt = gmtime(time());
  $date_is = "$gmt[2]:$gmt[1]:$gmt[0]";

  #
  # This is what the ticker tape will display
  #
  print "It is now $date_is (GMT)\n";

  exit(0);