Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
There have been many questions posted to Perlmonks recently asking about cleaning up HTML (either removing specific tags, or removing all tags except for a given few). Most people respond with one of two suggestions:
  1. a regular expression - this has the problem that it may not work because of the way > and < may appear in the HTML
  2. advice to check out <cpan://HTML::Parser> and use it as the basis for solving the problem
I've decided to delve in write some code that would serve as an example of how to properly filter out unwanted HTML tags from a document. I actually use <cpan://HTML::Filter> which is distributed with <cpan://HTML::Parser>. My code uses a hash of tags to keep; it could be easily adapted to work with a hash of tags to drop instead.

As always; any comments, criticism or advice on doing this better is appreciated.

package HTML::Sanitizer; require HTML::Filter; @ISA=qw(HTML::Filter); my $data=''; my %keep=( a => 1, p => 1, img => 1 ); sub output{ my $self=shift; my $d=$_[0]; if($d=~/\<\s*\/?\s*(\w+)/){ if(exists $keep{lc($1)}){ $data.=$d; } }else{ $data.=$d; } } my $p=HTML::Sanitizer->new(); $p->parse_file("index.html"); print $data;

In reply to HTML Sanitizer (removes unwanted tags) by lhoward

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others surveying the Monastery: (3)
As of 2024-03-29 02:22 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found