From: Scott <scott.walter@...>
Date: 2005-08-20T00:26:15+09:00
Subject: Re: open-uri and Kernel.open

Thanks for the info.  Thats a cool feature of Ruby where you can
redfine existing methods.
Mohit Muthanna wrote:
> The open-uri module simply redefines the Kernel.open method. You can
> do it yourself:
>
> module Kernel
>   private
>   alias original_open open
>
>   def open( blah, *blah_params, &blah_block)
>      ...blah
>      if some_condition
>         original_open( blah, *blah_params, &blah_block)
>      end
>   end
>
>   module_function :open
> end
>
>
> Above, we store the original "open" method in original_open; then we
> redefine open, calling the original open function if necessary.
>
> HTH,
> Mohit.
>
>
> On 8/19/05, Scott <scott.walter@vivare.com> wrote:
> > I am new ruby usrs (and loving it) and have a question.
> >
> > By "requiring" opne-uri into my source file I can now reference "http"
> > addresses as they were local files.  It seems that open-uri "hooks"
> > into the Kernel.open method.
> >
> > I am just wondering what aspect of the ruby language allows you to do
> > this.  Or is there some mechanism inside of the Kernel that allows you
> > to register a different protocol?
> >
> > thanks in advance,  scott.
> >
> >
> >
>
>
> --
> Mohit Muthanna [mohit (at) muthanna (uhuh) com]
> "There are 10 types of people. Those who understand binary, and those
> who don't."