From: daz <dooby@...10.karoo.co.uk>
Date: 2005-06-29T16:00:42+09:00
Subject: Re: Best way to parse/update HTML file?


_why wrote:
>
> [snip]
>
> A really fantastic HTML parser library is HTree by Tanaka Akira.
>

I'm glad you brought that in because I tried it last year and saw
that it was a serious "heavy horse" and perhaps a little bit
_more_ than I was looking for.
It was adding XHTML namespace prefixes to all tags, so a
horizontal rule, for example, became:

         <{http://www.w3.org/1999/xhtml}hr>

>
> It's completely forgiving of bad HTML and you can import the
> document into REXML through the HTree parser.
>
>   require 'htree'
>   HTree.parse( "<b>Bad markup" ).to_rexml
>

It may have been in its early stages of development, but my
assumption that HTree would be too strict is under review :-)
Applying your example, I get the result I was expecting
without all that namespace stuff.

> The only downside is that you'll need to install the iconv library,
> which can be a bit of a pain to track down on Windows.

Instead of hunting around for that, I'd made a dummy Ruby version
(no functionality for those who don't need any):

In my old version there are two files which require 'iconv' -
("text.rb" and "encoder.rb") which I changed to:

  begin
    require 'iconv'
  rescue LoadError
    require 'htree/iconv_dummy'
  end

Then, add this dummy file as:
  lib\ruby\site_ruby\1.8\htree\iconv_dummy.rb

#-------------------------------------------------------------
class Iconv

  ## For testing : Not part of the HTree package ##
  warn "Using dummy iconv lib:  #{__FILE__}"
  IC_DUMMY = true

  def Iconv.open(to, from)
    inst = Iconv.new
    block_given? ? yield(inst) : inst
  end
  def Iconv.iconv(to, from, *strs)
    strs.join
  end
  def Iconv.conv(to, from, str)
    str
  end
  def Iconv.list
    raise 'No Iconv.list'
  end
  def initialize(to, from)
  end
  def close
    ''
  end
  def iconv(str, strt = 0, len = -1)
    (len and !( len < 0 )) or len = str.size - strt
    str[strt, len]
  end

  module Failure
    def initialize(*args)  # 3
    end
    def success
    end
    def failed
    end
    def inspect
    end
  end

#  class InvalidEncoding  < ArgumentError; end
#  class IllegalSequence  < ArgumentError; end
#  class InvalidCharacter < ArgumentError; end
#  class OutOfRange       < RuntimeError;  end

  def Iconv.charset_map
    raise 'No Iconv.charset_map'
  end
end
#-------------------------------------------------------------


>
> _why
>


daz