#
# -*- Perl -*-
# $Id: html.pl,v 1.32.4.19 2008-05-09 07:51:00 opengl2772 Exp $
# Copyright (C) 1997-1999 Satoru Takabayashi All rights reserved.
# Copyright (C) 2000-2008 Namazu Project All rights reserved.
# This is free software with ABSOLUTELY NO WARRANTY.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either versions 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA
#
# This file must be encoded in EUC-JP encoding
#
package html;
use strict;
use Encode;
require 'util.pl';
require 'gfilter.pl';
my $EMBEDDED_FILE = '\.(asp|jsp|php[3s]?|phtml)(?:\.gz)?';
sub mediatype() {
return ('text/html');
}
sub status() {
return 'yes';
}
sub recursive() {
return 0;
}
sub pre_codeconv() {
return 1;
}
sub post_codeconv () {
return 0;
}
sub add_magic ($) {
return;
}
sub filter ($$$$$) {
my ($orig_cfile, $cont, $weighted_str, $headings, $fields)
= @_;
my $cfile = defined $orig_cfile ? $$orig_cfile : '';
util::vprint("Processing html file ...\n");
if ($var::Opt{'robotexclude'}) {
my $err = isexcluded($cont);
return $err if $err;
}
if ($cfile =~ /($EMBEDDED_FILE)$/o) {
embedded_filter($cont);
}
html_filter($cont, $weighted_str, $fields, $headings);
gfilter::line_adjust_filter($cont);
gfilter::line_adjust_filter($weighted_str);
gfilter::white_space_adjust_filter($cont);
gfilter::show_filter_debug_info($cont, $weighted_str,
$fields, $headings);
return undef;
}
# Check wheter or not the given URI is excluded.
sub isexcluded ($) {
my ($contref) = @_;
my $err = undef;
if ($$contref =~ /META\s+NAME\s*=\s*([\'\"]?)ROBOTS\1\s+[^>]*
CONTENT\s*=\s*([\'\"]?).*?(NOINDEX|NONE).*?\2[^>]*>/ix) #"
{
$err = _("is excluded because of ");
}
return $err;
}
sub html_filter ($$$$) {
my ($contref, $weighted_str, $fields, $headings) = @_;
html::escape_lt_gt($contref);
$fields->{'title'} = html::get_title($contref, $weighted_str);
html::get_author($contref, $fields);
html::get_meta_tags($contref, $weighted_str, $fields);
# html::get_img_alt($contref);
html::get_alt_attr($contref) if "ALT" =~ /^(?:$conf::HTML_ATTRIBUTES)$/io;
html::get_table_summary($contref) if "SUMMARY" =~ /^(?:$conf::HTML_ATTRIBUTES)$/io;
html::get_title_attr($contref) if "TITLE" =~ /^(?:$conf::HTML_ATTRIBUTES)$/io;
html::normalize_html_element($contref);
html::erase_above_body($contref);
html::remove_comments($contref);
html::weight_element($contref, $weighted_str, $headings);
html::remove_html_elements($contref);
# restore entities of each content.
html::decode_entity($contref);
html::decode_entity($weighted_str);
html::decode_entity($headings);
for my $key (keys %{$fields}) {
html::decode_entity(\$fields->{$key});
}
}
# Get rid of HTML-embedded codes
sub embedded_filter ($) {
my ($contref) = @_;
# handle with ASP,JSP,PHP,VBScript,JScript and JavaScript.
$$contref =~ s/<%.*?%>//gs;
$$contref =~ s/<\?.*?\?>//gs;
$$contref =~ s///gs;
$$contref =~ s///gs;
$$contref =~ s///igs;
}
# Convert independent < > s into entity references for escaping.
# Substitute twice for safe.
sub escape_lt_gt ($) {
my ($contref) = @_;
$$contref =~ s/\s<\s/ < /g;
$$contref =~ s/\s>\s/ > /g;
$$contref =~ s/\s<\s/ < /g;
$$contref =~ s/\s>\s/ > /g;
}
sub get_author ($$) {
my ($contref, $fields) = @_;
#
#
if ($$contref =~ m!]*?NAME=([\"\']?)AUTHOR\1\s[^>]*?CONTENT=([\"\']?)(.*?)\2\s*/?>!is) {
$fields->{'author'} = $3;
} elsif ($$contref =~ m!]*?HREF=([\"\']?)mailto:(.*?)\1\s*/?>!i) {
$fields->{'author'} = $2;
} elsif ($$contref =~ m!]*>(.*?)!is) {
my $tmp = $1;
# $tmp =~ s/\s//g;
if ($tmp =~ /\b([\w\.\-]+\@[\w\.\-]+(?:\.[\w\.\-]+)+)\b/) {
$fields->{'author'} = $1;
}
}
}
# Get title from ..
# It's okay to exits two or more ....
# First one will be retrieved.
sub get_title ($$) {
my ($contref, $weighted_str) = @_;
my $title = '';
if ($$contref =~ s!]*>(.*?)!!is) {
$title = $1;
$title =~ s/\s+/ /g;
$title =~ s/^\s+//;
$title =~ s/\s+$//;
my $weight = $conf::Weight{'html'}->{'title'};
$$weighted_str .= "\x7f$weight\x7f$title\x7f/$weight\x7f\n";
} else {
$title = $conf::NO_TITLE;
}
return $title;
}
# get foo bar from
sub get_meta_tags ($$$) {
my ($contref, $weighted_str, $fields) = @_;
#
my $weight = $conf::Weight{'metakey'};
$$weighted_str .= "\x7f$weight\x7f$3\x7f/$weight\x7f\n"
if $$contref =~ /]*content\s*=\s*([\'\"]?)([^>]*?)\2[^>]*>/ix; #"
#
$$weighted_str .= "\x7f$weight\x7f$3\x7f/$weight\x7f\n"
if $$contref =~ /]*content\s*=\s*([\'\"]?)([^>]*?)\2[^>]*>/ix; #"
if ($var::Opt{'meta'}) {
my @keys = split '\|', $conf::META_TAGS;
for my $key (@keys) {
if ($key !~ m/^author$/i) {
my $quotekey = quotemeta($key);
while ($$contref =~ /]*content\s*=\s*([\'\"]?)([^>]*?)\2[^>]*>/gix)
{
$fields->{$key} .= $3 . " ";
}
util::dprint("meta: $key: $fields->{$key}\n")
if defined $fields->{$key};
}
}
}
}
# Get foo from
# It's not to handle HTML strictly.
sub get_img_alt ($) {
my ($contref) = @_;
$$contref =~ s/(]*)\s+ALT\s*=\s*([\"\'])(.*?)\2([^>]*>)/ $3 $1$4/gi;
$$contref =~ s/(]*)\s+ALT\s*=\s*([^\"\'\s>]*)([^>]*>)/ $2 $1$3/gi;
}
# Get foo from
# It's not to handle HTML strictly.
sub get_alt_attr ($) {
my ($contref) = @_;
$$contref =~ s/(<[A-Z]+[^>]*)\s+ALT\s*=\s*([\"\'])(.*?)\2([^>]*>)/ $3 $1$4/gi;
$$contref =~ s/(<[A-Z]+[^>]*)\s+ALT\s*=\s*([^\"\'\s>]*)([^>]*>)/ $2 $1$3/gi;
}
# Get foo from