04-07-2010
HTML code remove
Hello,
I have one file which has been inserted intermittently with HTML web page.
I would like to remove all text between "<html xmlns="http://www.w3.org/1999/xhtml">" and </html> tags.
Can any one please suggest me sed regular expression for it.
Thanks
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LEARN ABOUT DEBIAN
html::strip
Strip(3pm) User Contributed Perl Documentation Strip(3pm)
NAME
HTML::Strip - Perl extension for stripping HTML markup from text.
SYNOPSIS
use HTML::Strip;
my $hs = HTML::Strip->new();
my $clean_text = $hs->parse( $raw_html );
$hs->eof;
DESCRIPTION
This module simply strips HTML-like markup from text in a very quick and brutal manner. It could quite easily be used to strip XML or SGML
from text as well; but removing HTML markup is a much more common problem, hence this module lives in the HTML:: namespace.
It is written in XS, and thus about five times quicker than using regular expressions for the same task.
It does not do any syntax checking (if you want that, use HTML::Parser), instead it merely applies the following rules:
1. Anything that looks like a tag, or group of tags will be replaced with a single space character. Tags are considered to be anything
that starts with a "<" and ends with a ">"; with the caveat that a ">" character may appear in either of the following without ending
the tag:
Quote
Quotes are considered to start with either a "'" or a """ character, and end with a matching character not preceded by an even
number or escaping slashes (i.e. """ does not end the quote but "\\"" does).
Comment
If the tag starts with an exclamation mark, it is assumed to be a declaration or a comment. Within such tags, ">" characters do not
end the tag if they appear within pairs of double dashes (e.g. "<!-- <a href="old.htm">old page</a> -->" would be stripped
completely).
2. Anything the appears within so-called strip tags is stripped as well. By default, these tags are "title", "script", "style" and
"applet".
HTML::Strip maintains state between calls, so you can parse a document in chunks should you wish. If one chunk ends half-way through a tag,
quote, comment, or whatever; it will remember this, and expect the next call to parse to start with the remains of said tag.
If this is not going to be the case, be sure to call $hs->eof() between calls to $hs->parse().
METHODS
new()
Constructor. Can optionally take a hash of settings (with keys corresponsing to the "set_" methods below).
For example, the following is a valid constructor:
my $hs = HTML::Strip->new(
striptags => [ 'script', 'iframe' ],
emit_spaces => 0
);
parse()
Takes a string as an argument, returns it stripped of HTML.
eof()
Resets the current state information, ready to parse a new block of HTML.
clear_striptags()
Clears the current set of strip tags.
add_striptag()
Adds the string passed as an argument to the current set of strip tags.
set_striptags()
Takes a reference to an array of strings, which replace the current set of strip tags.
set_emit_spaces()
Takes a boolean value. If set to false, HTML::Strip will not attempt any conversion of tags into spaces. Set to true by default.
set_decode_entities()
Takes a boolean value. If set to false, HTML::Strip will decode HTML entities. Set to true by default.
LIMITATIONS
Whitespace
Despite only outputting one space character per group of tags, and avoiding doing so when tags are bordered by spaces or the start or
end of strings, HTML::Strip can often output more than desired; such as with the following HTML:
<h1> HTML::Strip </h1> <p> <em> <strong> fast, and brutal </strong> </em> </p>
Which gives the following output:
" HTML::Strip fast, and brutal "
Thus, you may want to post-filter the output of HTML::Strip to remove excess whitespace (for example, using "tr/ / /s;"). (This has
been improved since previous releases, but is still an issue)
HTML Entities
HTML::Strip will only attempt decoding of HTML entities if HTML::Entities is installed.
EXPORT
None by default.
AUTHOR
Alex Bowley <kilinrax@cpan.org>
SEE ALSO
perl, HTML::Parser, HTML::Entities
perl v5.14.2 2011-11-15 Strip(3pm)