do_push

do_push (params)

• Implements a server push operation, which updates a page at specific intervals. Parameters are:
  • -delay => n
  • Specifies the number of seconds, n, to wait before the next call to the page-drawing subroutine.
  • -last_page => &sublast
  • Runs the subroutine sublast to draw the last page update of a server push operation. The -last_page routine is invoked when the -next_page routine returns false. A reference to a subroutine glob should be provided for this parameter, but the name of the subroutine is also acceptable.
  • -next_page => &sub
  • sub is the name of the subroutine responsible for redrawing the page and counting the number of iterations (if you want repeated updating). The do_push routine ends when sub returns false (or when the -last_page subroutine is invoked). A reference to a subroutine glob should be provided for this parameter, but the name of the subroutine is also acceptable.
  • -type = string
  • Specifies the content type of the pushed data. The default value is text/html.