From: William James <w_a_x_man@...>
Date: 2008-02-29T05:14:54+09:00
Subject: Re: Need a regex searching html code

On Feb 28, 9:50 am, William James <w_a_x_...@yahoo.com> wrote:
> On Feb 28, 12:36 am, Chirantan <chirantan.rajh...@gmail.com> wrote:
>
> > I have an html code into string. I want to retrieve the content (Can
> > be any HTML code with any number of tags) present inside the div after
> > the heading till the end of the div.
>
> > Example,
>
> > <div class="info">
> > <h5>Tagline:</h5>
> > Yippee Ki Yay Mo - John 6:27
> > </div>
>
> > <div class="info">
> > <h5>Plot Outline:</h5>
> > John McClane takes on an Internet-based terrorist organization who is
> > systematically shutting down the United States. <a class="tn15more
> > inline" href="http://www.imdb.com/title/tt0337978/plotsummary"
> > onclick="(new Image()).src='/rg/title-tease/plotsummary/images/b.gif?
> > link=/title/tt0337978/plotsummary';">more</a>
> > </div>
>
> > In the above example, Plot Outline is header that I am looking for
> > then, regex should give me -
>
> > John McClane takes on an Internet-based terrorist organization who is
> > systematically shutting down the United States. <a class="tn15more
> > inline" href="http://www.imdb.com/title/tt0337978/plotsummary"
> > onclick="(new Image()).src='/rg/title-tease/plotsummary/images/b.gif?
> > link=/title/tt0337978/plotsummary';">more</a>
>
> > And if "Tagline:" is what I am looking for then regex should give me -
>
> > Yippee Ki Yay Mo - John 6:27
>
> > I hope the problem statement is clear.
>
> Note that this will give spurious results if an html comment happens
> to contain what you are looking for.
>
> def find_header header, html
>   # Put all of the DIVs in an array.
>   divs = html.scan( %r{<div.*?>(.*?)</div>}im ).flatten
>   divs.each{|s|
>     if s =~ %r{<h(\d)>#{header}</h\1>(.*)}im
>       return $2.strip
>     end
>   }
>   return nil
> end
>
> html = DATA.read
>
> puts find_header( "Plot Outline:", html )
>
> __END__
> <div class="info">
> <h5>Tagline:</h5>
> Yippee Ki Yay Mo - John 6:27
> </div>
>
> <div class="info">
> <h5>Plot Outline:</h5>
> John McClane takes on an Internet-based terrorist organization who is
> systematically shutting down the United States. <a class="tn15more
> inline" href="http://www.imdb.com/title/tt0337978/plotsummary"
> onclick="(new Image()).src='/rg/title-tease/plotsummary/images/b.gif?
> link=/title/tt0337978/plotsummary';">more</a>
> </div>

More concise:

def find_header header, html
  html.scan( %r{<div.*?>(.*?)</div>}im ).flatten.each{|s|
    return $1.strip if s =~ %r{<h5>#{header}</h5(.*)}im }
  return nil
end