Take a look at HTML::Parser it already does what you want to do. You'll be better off if you don't reinvent this very complicated wheel.

If you really want to do a parser for academic reason I would recommend at least using Parse::RecDescent written by TheDamian this will get you though the tags correctly.

Else you might just be looking for a text based browser like lynx it will run on *nix and M$ Win

As for your post you can use <code> </code> tags to get you spacing and wrapping correct. I also lets other monks DL your code. There are several resources on Perlmonks that can help you out such as turnstep's home node.
Enjoy Perlmonks

UPDATE: as crazyinsomniac pointed out I would be remiss if I did not point out that some searches could have helped out finding some similar nodes like:
  • parsing HTML
  • Dump Text from HTML
    Search is your friend :)
    Some other nodes to read On asking for help and How to ReadTheFineManual

    grep
    grep> cd pub
    grep> more beer

    In reply to Re: how to force HTML to display as text by grep
    in thread how to force HTML to display as text by Summers_Azin_pr0n

    Title:
    Use:  <p> text here (a paragraph) </p>
    and:  <code> code here </code>
    to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.