| 1 | ###########################################################################
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| 2 | #
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| 3 | # HTMLPlug.pm -- basic html plugin
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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| 27 | #
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| 28 | # Note that this plugin handles frames only in a very simple way
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| 29 | # i.e. each frame is treated as a separate document. This means
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| 30 | # search results will contain links to individual frames rather
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| 31 | # than linking to the top level frameset.
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| 32 | # There may also be some problems caused by the _parent target
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| 33 | # (it's removed by this plugin)
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| 34 | #
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| 35 |
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| 36 | package HTMLPlug;
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| 37 |
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| 38 | use BasPlug;
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| 39 | use ghtml;
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| 40 | use unicode;
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| 41 | use util;
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| 42 | use XMLParser;
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| 43 |
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| 44 | sub BEGIN {
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| 45 | @HTMLPlug::ISA = ('BasPlug');
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| 46 | }
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| 47 |
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| 48 | use strict; # every perl program should have this!
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| 49 | no strict 'refs'; # make an exception so we can use variables as filehandles
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| 50 |
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| 51 | my $arguments =
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| 52 | [ { 'name' => "process_exp",
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| 53 | 'desc' => "{BasPlug.process_exp}",
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| 54 | 'type' => "regexp",
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| 55 | 'deft' => &get_default_process_exp() },
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| 56 | { 'name' => "block_exp",
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| 57 | 'desc' => "{BasPlug.block_exp}",
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| 58 | 'type' => 'regexp',
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| 59 | 'deft' => &get_default_block_exp() },
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| 60 | { 'name' => "nolinks",
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| 61 | 'desc' => "{HTMLPlug.nolinks}",
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| 62 | 'type' => "flag" },
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| 63 | { 'name' => "keep_head",
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| 64 | 'desc' => "{HTMLPlug.keep_head}",
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| 65 | 'type' => "flag" },
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| 66 | { 'name' => "extract_style",
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| 67 | 'desc' => "{HTMLPlug.extract_style}",
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| 68 | 'type' => "flag" },
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| 69 | { 'name' => "no_metadata",
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| 70 | 'desc' => "{HTMLPlug.no_metadata}",
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| 71 | 'type' => "flag" },
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| 72 | { 'name' => "metadata_fields",
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| 73 | 'desc' => "{HTMLPlug.metadata_fields}",
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| 74 | 'type' => "string",
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| 75 | 'deft' => "Title" },
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| 76 | { 'name' => "hunt_creator_metadata",
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| 77 | 'desc' => "{HTMLPlug.hunt_creator_metadata}",
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| 78 | 'type' => "flag" },
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| 79 | { 'name' => "file_is_url",
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| 80 | 'desc' => "{HTMLPlug.file_is_url}",
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| 81 | 'type' => "flag" },
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| 82 | { 'name' => "assoc_files",
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| 83 | 'desc' => "{HTMLPlug.assoc_files}",
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| 84 | 'type' => "regexp",
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| 85 | 'deft' => &get_default_block_exp() },
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| 86 | { 'name' => "rename_assoc_files",
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| 87 | 'desc' => "{HTMLPlug.rename_assoc_files}",
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| 88 | 'type' => "flag" },
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| 89 | { 'name' => "title_sub",
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| 90 | 'desc' => "{HTMLPlug.title_sub}",
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| 91 | 'type' => "string",
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| 92 | 'deft' => "" },
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| 93 | { 'name' => "description_tags",
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| 94 | 'desc' => "{HTMLPlug.description_tags}",
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| 95 | 'type' => "flag" },
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| 96 | # retain this for backward compatibility (w3mir option was replaced by
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| 97 | # file_is_url)
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| 98 | { 'name' => "w3mir",
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| 99 | # 'desc' => "{HTMLPlug.w3mir}",
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| 100 | 'type' => "flag",
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| 101 | 'hiddengli' => "yes"},
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| 102 | { 'name' => "no_strip_metadata_html",
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| 103 | 'desc' => "{HTMLPlug.no_strip_metadata_html}",
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| 104 | 'type' => "string",
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| 105 | 'deft' => "",
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| 106 | 'reqd' => "no"},
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| 107 | { 'name' => "sectionalise_using_h_tags",
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| 108 | 'desc' => "{HTMLPlug.sectionalise_using_h_tags}",
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| 109 | 'type' => "flag" }
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| 110 | ];
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| 111 |
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| 112 | my $options = { 'name' => "HTMLPlug",
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| 113 | 'desc' => "{HTMLPlug.desc}",
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| 114 | 'abstract' => "no",
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| 115 | 'inherits' => "yes",
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| 116 | 'args' => $arguments };
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| 117 |
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| 118 | sub new {
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| 119 | my ($class) = shift (@_);
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| 120 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 121 | push(@$pluginlist, $class);
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| 122 |
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| 123 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 124 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 125 |
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| 126 | my $self = new BasPlug($pluginlist, $inputargs, $hashArgOptLists);
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| 127 |
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| 128 | if ($self->{'w3mir'}) {
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| 129 | $self->{'file_is_url'} = 1;
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| 130 | }
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| 131 | $self->{'aux_files'} = {};
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| 132 | $self->{'dir_num'} = 0;
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| 133 | $self->{'file_num'} = 0;
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| 134 |
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| 135 | return bless $self, $class;
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| 136 | }
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| 137 |
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| 138 | # may want to use (?i)\.(gif|jpe?g|jpe|png|css|js(?:@.*)?)$
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| 139 | # if have eg <script language="javascript" src="img/lib.js@123">
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| 140 | sub get_default_block_exp {
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| 141 | my $self = shift (@_);
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| 142 |
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| 143 | return q^(?i)\.(gif|jpe?g|jpe|jpg|png|css)$^;
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| 144 | }
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| 145 |
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| 146 | sub get_default_process_exp {
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| 147 | my $self = shift (@_);
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| 148 |
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| 149 | # the last option is an attempt to encode the concept of an html query ...
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| 150 | return q^(?i)(\.html?|\.shtml|\.shm|\.asp|\.php\d?|\.cgi|.+[\?\@].+=.*)$^;
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| 151 | }
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| 152 |
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| 153 | sub store_block_files
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| 154 | {
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| 155 | my $self =shift (@_);
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| 156 | my ($filename) = @_;
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| 157 | my $html_fname = $filename;
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| 158 | my @file_blocks;
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| 159 |
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| 160 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
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| 161 |
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| 162 | # read in file ($text will be in utf8)
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| 163 | my $text = "";
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| 164 | $self->read_file ($filename, $encoding, $language, \$text);
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| 165 | my $textref = \$text;
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| 166 | my $opencom = '(?:<!--|<!(?:—|—|--))';
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| 167 | my $closecom = '(?:-->|(?:—|—|--)>)';
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| 168 | $$textref =~ s/$opencom(.*?)$closecom//gs;
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| 169 |
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| 170 | my $attval = "\\\"[^\\\"]+\\\"|[^\\s>]+";
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| 171 | my @img_matches = ($$textref =~ m/<img[^>]*?src\s*=\s*($attval)[^>]*>/igs);
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| 172 | my @usemap_matches = ($$textref =~ m/<img[^>]*?usemap\s*=\s*($attval)[^>]*>/igs);
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| 173 | my @link_matches = ($$textref =~ m/<link[^>]*?href\s*=\s*($attval)[^>]*>/igs);
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| 174 | my @embed_matches = ($$textref =~ m/<embed[^>]*?src\s*=\s*($attval)[^>]*>/igs);
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| 175 | my @tabbg_matches = ($$textref =~ m/<(?:table|tr|td)[^>]*?background\s*=\s*($attval)[^>]*>/igs);
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| 176 | my @script_matches = ($$textref =~ m/<script[^>]*?src\s*=\s*($attval)[^>]*>/igs);
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| 177 | foreach my $link (@img_matches, @usemap_matches, @link_matches, @embed_matches, @tabbg_matches, @script_matches) {
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| 178 |
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| 179 | # remove quotes from link at start and end if necessary
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| 180 | if ($link=~/^\"/) {
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| 181 | $link=~s/^\"//;
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| 182 | $link=~s/\"$//;
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| 183 | }
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| 184 |
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| 185 | $link =~ s/\#.*$//s; # remove any anchor names, e.g. foo.html#name becomes foo.html
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| 186 |
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| 187 | if ($link !~ m@^/@ && $link !~ m/^([A-Z]:?)\\/) {
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| 188 | # Turn relative file path into full path
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| 189 | my $dirname = &File::Basename::dirname($filename);
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| 190 | $link = &util::filename_cat($dirname, $link);
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| 191 | }
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| 192 | $link = $self->eval_dir_dots($link);
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| 193 |
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| 194 | $self->{'file_blocks'}->{$link} = 1;
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| 195 | }
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| 196 | }
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| 197 |
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| 198 |
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| 199 | # do plugin specific processing of doc_obj
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| 200 | sub process {
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| 201 | my $self = shift (@_);
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| 202 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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| 203 | my $outhandle = $self->{'outhandle'};
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| 204 |
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| 205 | print STDERR "<Processing n='$file' p='HTMLPlug'>\n" if ($gli);
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| 206 |
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| 207 | print $outhandle "HTMLPlug: processing $file\n"
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| 208 | if $self->{'verbosity'} > 1;
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| 209 |
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| 210 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
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| 211 | # this makes life so much easier... perl can cope with unix-style '/'s.
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| 212 | $base_dir =~ s@(\\)+@/@g;
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| 213 | $file =~ s@(\\)+@/@g;
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| 214 | }
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| 215 |
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| 216 | # reset per-doc stuff...
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| 217 | $self->{'aux_files'} = {};
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| 218 | $self->{'dir_num'} = 0;
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| 219 | $self->{'file_num'} = 0;
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| 220 |
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| 221 | # process an HTML file where sections are divided by headings tags (H1, H2 ...)
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| 222 | # you can also include metadata in the format (X can be any number)
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| 223 | # <hX>Title<!--gsdl-metadata
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| 224 | # <Metadata name="name1">value1</Metadata>
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| 225 | # ...
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| 226 | # <Metadata name="nameN">valueN</Metadata>
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| 227 | #--></hX>
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| 228 | if ($self->{'sectionalise_using_h_tags'}) {
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| 229 | # description_tags should always be activated because we convert headings to description tags
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| 230 | $self->{'description_tags'} = 1;
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| 231 |
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| 232 | my $arrSections = [];
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| 233 | $$textref =~ s/<h([0-9]+)[^>]*>(.*?)<\/h[0-9]+>/$self->process_heading($1, $2, $arrSections, $file)/isge;
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| 234 |
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| 235 | if (scalar(@$arrSections)) {
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| 236 | my $strMetadata = $self->update_section_data($arrSections, -1);
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| 237 | if (length($strMetadata)) {
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| 238 | $strMetadata = '<!--' . $strMetadata . "\n-->\n</body>";
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| 239 | $$textref =~ s/<\/body>/$strMetadata/ig;
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| 240 | }
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| 241 | }
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| 242 | }
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| 243 |
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| 244 | my $cursection = $doc_obj->get_top_section();
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| 245 |
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| 246 | $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection)
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| 247 | unless $self->{'no_metadata'};
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| 248 |
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| 249 | # extract style info as DocumentHeader metadata
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| 250 | $self->extract_style ($textref, $doc_obj, $cursection, $base_dir, $file)
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| 251 | if ($self->{'extract_style'} == 1);
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| 252 |
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| 253 | # Store URL for page as metadata - this can be used for an
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| 254 | # altavista style search interface. The URL won't be valid
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| 255 | # unless the file structure contains the domain name (i.e.
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| 256 | # like when w3mir is used to download a website).
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| 257 |
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| 258 | # URL metadata (even invalid ones) are used to support internal
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| 259 | # links, so even if 'file_is_url' is off, still need to store info
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| 260 |
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| 261 | my $web_url = "http://$file";
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| 262 | $doc_obj->add_metadata($cursection, "URL", $web_url);
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| 263 |
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| 264 | if ($self->{'file_is_url'}) {
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| 265 | $doc_obj->add_metadata($cursection, "weblink", "<a href=\"$web_url\">");
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| 266 | $doc_obj->add_metadata($cursection, "webicon", "_iconworld_");
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| 267 | $doc_obj->add_metadata($cursection, "/weblink", "</a>");
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| 268 | }
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| 269 |
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| 270 | if ($self->{'description_tags'}) {
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| 271 | # remove the html header - note that doing this here means any
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| 272 | # sections defined within the header will be lost (so all <Section>
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| 273 | # tags must appear within the body of the HTML)
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| 274 | my ($head_keep) = ($$textref =~ m/^(.*?)<body[^>]*>/is);
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| 275 |
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| 276 | $$textref =~ s/^.*?<body[^>]*>//is;
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| 277 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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| 278 |
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| 279 | my $opencom = '(?:<!--|<!(?:—|—|--))';
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| 280 | my $closecom = '(?:-->|(?:—|—|--)>)';
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| 281 |
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| 282 | my $lt = '(?:<|<)';
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| 283 | my $gt = '(?:>|>)';
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| 284 | my $quot = '(?:"|"|”|“)';
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| 285 |
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| 286 | my $dont_strip = '';
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| 287 | if ($self->{'no_strip_metadata_html'}) {
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| 288 | ($dont_strip = $self->{'no_strip_metadata_html'}) =~ s{,}{|}g;
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| 289 | }
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| 290 |
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| 291 | my $found_something = 0; my $top = 1;
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| 292 | while ($$textref =~ s/^(.*?)$opencom(.*?)$closecom//s) {
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| 293 | my $text = $1;
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| 294 | my $comment = $2;
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| 295 | if (defined $text) {
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| 296 | # text before a comment - note that getting to here
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| 297 | # doesn't necessarily mean there are Section tags in
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| 298 | # the document
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| 299 | $self->process_section(\$text, $base_dir, $file, $doc_obj, $cursection);
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| 300 | }
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| 301 | while ($comment =~ s/$lt(.*?)$gt//s) {
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| 302 | my $tag = $1;
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| 303 | if ($tag eq "Section") {
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| 304 | $found_something = 1;
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| 305 | $cursection = $doc_obj->insert_section($doc_obj->get_end_child($cursection)) unless $top;
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| 306 | $top = 0;
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| 307 | } elsif ($tag eq "/Section") {
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| 308 | $found_something = 1;
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| 309 | $cursection = $doc_obj->get_parent_section ($cursection);
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| 310 | } elsif ($tag =~ /^Metadata name=$quot(.*?)$quot/s) {
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| 311 | my $metaname = $1;
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| 312 | my $accumulate = $tag =~ /mode=${quot}accumulate${quot}/ ? 1 : 0;
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| 313 | $comment =~ s/^(.*?)$lt\/Metadata$gt//s;
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| 314 | my $metavalue = $1;
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| 315 | $metavalue =~ s/^\s+//;
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| 316 | $metavalue =~ s/\s+$//;
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| 317 | # assume that no metadata value intentionally includes
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| 318 | # carriage returns or HTML tags (if they're there they
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| 319 | # were probably introduced when converting to HTML from
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| 320 | # some other format).
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| 321 | # actually some people want to have html tags in their
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| 322 | # metadata.
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| 323 | $metavalue =~ s/[\cJ\cM]/ /sg;
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| 324 | $metavalue =~ s/<[^>]+>//sg
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| 325 | unless $dont_strip && ($dont_strip eq 'all' || $metaname =~ /^($dont_strip)$/);
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| 326 | $metavalue =~ s/\s+/ /sg;
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| 327 | if ($accumulate) {
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| 328 | $doc_obj->add_utf8_metadata($cursection, $metaname, $metavalue);
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| 329 | } else {
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| 330 | $doc_obj->set_utf8_metadata_element($cursection, $metaname, $metavalue);
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| 331 | }
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| 332 | } elsif ($tag eq "Description" || $tag eq "/Description") {
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| 333 | # do nothing with containing Description tags
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| 334 | } else {
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| 335 | # simple HTML tag (probably created by the conversion
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| 336 | # to HTML from some other format) - we'll ignore it and
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| 337 | # hope for the best ;-)
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| 338 | }
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| 339 | }
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| 340 | }
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| 341 | if ($cursection ne "") {
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| 342 | print $outhandle "HTMLPlug: WARNING: $file contains unmatched <Section></Section> tags\n";
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| 343 | }
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| 344 |
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| 345 | $$textref =~ s/^.*?<body[^>]*>//is;
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| 346 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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| 347 | if ($$textref =~ /\S/) {
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| 348 | if (!$found_something) {
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| 349 | if ($self->{'verbosity'} > 2) {
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| 350 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags so\n";
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| 351 | print $outhandle " will be processed as a single section document\n";
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| 352 | }
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| 353 |
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| 354 | # go ahead and process single-section document
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| 355 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
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| 356 |
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| 357 | } else {
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| 358 | print $outhandle "HTMLPlug: WARNING: $file contains the following text outside\n";
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| 359 | print $outhandle " of the final closing </Section> tag. This text will\n";
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| 360 | print $outhandle " be ignored.";
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| 361 |
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| 362 | my ($text);
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| 363 | if (length($$textref) > 30) {
|
|---|
| 364 | $text = substr($$textref, 0, 30) . "...";
|
|---|
| 365 | } else {
|
|---|
| 366 | $text = $$textref;
|
|---|
| 367 | }
|
|---|
| 368 | $text =~ s/\n/ /isg;
|
|---|
| 369 | print $outhandle " ($text)\n";
|
|---|
| 370 | }
|
|---|
| 371 | } elsif (!$found_something) {
|
|---|
| 372 |
|
|---|
| 373 | if ($self->{'verbosity'} > 2) {
|
|---|
| 374 | # may get to here if document contained no valid Section
|
|---|
| 375 | # tags but did contain some comments. The text will have
|
|---|
| 376 | # been processed already but we should print the warning
|
|---|
| 377 | # as above and extract metadata
|
|---|
| 378 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags and\n";
|
|---|
| 379 | print $outhandle " is blank or empty. Metadata will be assigned if present.\n";
|
|---|
| 380 | }
|
|---|
| 381 | }
|
|---|
| 382 | } # if $self->{'description_tags'}
|
|---|
| 383 | else {
|
|---|
| 384 | # remove header and footer
|
|---|
| 385 | if (!$self->{'keep_head'}) {
|
|---|
| 386 | $$textref =~ s/^.*?<body[^>]*>//is;
|
|---|
| 387 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
|
|---|
| 388 | }
|
|---|
| 389 |
|
|---|
| 390 | # single section document
|
|---|
| 391 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
|
|---|
| 392 | }
|
|---|
| 393 | return 1;
|
|---|
| 394 | }
|
|---|
| 395 |
|
|---|
| 396 |
|
|---|
| 397 | sub process_heading
|
|---|
| 398 | {
|
|---|
| 399 | my ($self, $nHeadNo, $strHeadingText, $arrSections, $file) = @_;
|
|---|
| 400 | $strHeadingText = '' if (!defined($strHeadingText));
|
|---|
| 401 |
|
|---|
| 402 | my $strMetadata = $self->update_section_data($arrSections, int($nHeadNo));
|
|---|
| 403 |
|
|---|
| 404 | my $strSecMetadata = '';
|
|---|
| 405 | while ($strHeadingText =~ s/<!--gsdl-metadata(.*?)-->//is)
|
|---|
| 406 | {
|
|---|
| 407 | $strSecMetadata .= $1;
|
|---|
| 408 | }
|
|---|
| 409 |
|
|---|
| 410 | $strHeadingText =~ s/^\s+//g;
|
|---|
| 411 | $strHeadingText =~ s/\s+$//g;
|
|---|
| 412 | $strSecMetadata =~ s/^\s+//g;
|
|---|
| 413 | $strSecMetadata =~ s/\s+$//g;
|
|---|
| 414 |
|
|---|
| 415 | $strMetadata .= "\n<Section>\n\t<Description>\n\t\t<Metadata name=\"Title\">" . $strHeadingText . "</Metadata>\n";
|
|---|
| 416 |
|
|---|
| 417 | if (length($strSecMetadata)) {
|
|---|
| 418 | $strMetadata .= "\t\t" . $strSecMetadata . "\n";
|
|---|
| 419 | }
|
|---|
| 420 |
|
|---|
| 421 | $strMetadata .= "\t</Description>\n";
|
|---|
| 422 |
|
|---|
| 423 | return "<!--" . $strMetadata . "-->";
|
|---|
| 424 | }
|
|---|
| 425 |
|
|---|
| 426 |
|
|---|
| 427 | sub update_section_data
|
|---|
| 428 | {
|
|---|
| 429 | my ($self, $arrSections, $nCurTocNo) = @_;
|
|---|
| 430 | my ($strBuffer, $nLast, $nSections) = ('', 0, scalar(@$arrSections));
|
|---|
| 431 |
|
|---|
| 432 | if ($nSections == 0) {
|
|---|
| 433 | push @$arrSections, $nCurTocNo;
|
|---|
| 434 | return $strBuffer;
|
|---|
| 435 | }
|
|---|
| 436 | $nLast = $arrSections->[$nSections - 1];
|
|---|
| 437 | if ($nCurTocNo > $nLast) {
|
|---|
| 438 | push @$arrSections, $nCurTocNo;
|
|---|
| 439 | return $strBuffer;
|
|---|
| 440 | }
|
|---|
| 441 | for(my $i = $nSections - 1; $i >= 0; $i--) {
|
|---|
| 442 | if ($nCurTocNo <= $arrSections->[$i]) {
|
|---|
| 443 | $strBuffer .= "\n</Section>";
|
|---|
| 444 | pop @$arrSections;
|
|---|
| 445 | }
|
|---|
| 446 | }
|
|---|
| 447 | push @$arrSections, $nCurTocNo;
|
|---|
| 448 | return $strBuffer;
|
|---|
| 449 | }
|
|---|
| 450 |
|
|---|
| 451 |
|
|---|
| 452 | # note that process_section may be called multiple times for a single
|
|---|
| 453 | # section (relying on the fact that add_utf8_text appends the text to any
|
|---|
| 454 | # that may exist already).
|
|---|
| 455 | sub process_section {
|
|---|
| 456 | my $self = shift (@_);
|
|---|
| 457 | my ($textref, $base_dir, $file, $doc_obj, $cursection) = @_;
|
|---|
| 458 | # trap links
|
|---|
| 459 | if (!$self->{'nolinks'}) {
|
|---|
| 460 |
|
|---|
| 461 | # usemap="./#index" not handled correctly => change to "#index"
|
|---|
| 462 | $$textref =~ s/(<img[^>]*?usemap\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
|
|---|
| 463 | $self->replace_usemap_links($1, $2, $3)/isge;
|
|---|
| 464 |
|
|---|
| 465 | $$textref =~ s/(<(?:a|area|frame|link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
|
|---|
| 466 | $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
|---|
| 467 | }
|
|---|
| 468 |
|
|---|
| 469 | # trap images
|
|---|
| 470 |
|
|---|
| 471 | # allow spaces if inside quotes - jrm21
|
|---|
| 472 | $$textref =~ s/(<(?:img|embed|table|tr|td)[^>]*?(?:src|background)\s*=\s*)([\"\'][^\"\']+[\"\']|[^\s>]+)([^>]*>)/
|
|---|
| 473 | $self->replace_images ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
|
|---|
| 474 |
|
|---|
| 475 | # add text to document object
|
|---|
| 476 | # turn \ into \\ so that the rest of greenstone doesn't think there
|
|---|
| 477 | # is an escape code following. (Macro parsing loses them...)
|
|---|
| 478 | $$textref =~ s/\\/\\\\/go;
|
|---|
| 479 |
|
|---|
| 480 | $doc_obj->add_utf8_text($cursection, $$textref);
|
|---|
| 481 | }
|
|---|
| 482 |
|
|---|
| 483 | sub replace_images {
|
|---|
| 484 | my $self = shift (@_);
|
|---|
| 485 | my ($front, $link, $back, $base_dir,
|
|---|
| 486 | $file, $doc_obj, $section) = @_;
|
|---|
| 487 |
|
|---|
| 488 | # remove quotes from link at start and end if necessary
|
|---|
| 489 | if ($link=~/^[\"\']/) {
|
|---|
| 490 | $link=~s/^[\"\']//;$link=~s/[\"\']$//;
|
|---|
| 491 | $front.='"';
|
|---|
| 492 | $back="\"$back";
|
|---|
| 493 | }
|
|---|
| 494 |
|
|---|
| 495 | $link =~ s/\n/ /g;
|
|---|
| 496 |
|
|---|
| 497 | # Hack to overcome Windows wv 0.7.1 bug that causes embedded images to be broken
|
|---|
| 498 | # If the Word file path has spaces in it, wv messes up and you end up with
|
|---|
| 499 | # absolute paths for the images, and without the "file://" prefix
|
|---|
| 500 | # So check for this special case and massage the data to be correct
|
|---|
| 501 | if ($ENV{'GSDLOS'} =~ /^windows/i && $self->{'plugin_type'} eq "WordPlug" && $link =~ /^[A-Za-z]\:\\/) {
|
|---|
| 502 | $link =~ s/^.*\\([^\\]+)$/$1/;
|
|---|
| 503 | }
|
|---|
| 504 |
|
|---|
| 505 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
|---|
| 506 |
|
|---|
| 507 | my $img_file = $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section);
|
|---|
| 508 |
|
|---|
| 509 | my $anchor_name = $img_file;
|
|---|
| 510 | $anchor_name =~ s/^.*\///;
|
|---|
| 511 | $anchor_name = "<a name=\"$anchor_name\">";
|
|---|
| 512 |
|
|---|
| 513 | return $front . $img_file . $back . $anchor_name;
|
|---|
| 514 | }
|
|---|
| 515 |
|
|---|
| 516 | sub replace_href_links {
|
|---|
| 517 | my $self = shift (@_);
|
|---|
| 518 | my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
|
|---|
| 519 |
|
|---|
| 520 | # attempt to sort out targets - frames are not handled
|
|---|
| 521 | # well in this plugin and some cases will screw things
|
|---|
| 522 | # up - e.g. the _parent target (so we'll just remove
|
|---|
| 523 | # them all ;-)
|
|---|
| 524 | $front =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
|---|
| 525 | $back =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
|
|---|
| 526 | $front =~ s/target=\"?_parent\"?//is;
|
|---|
| 527 | $back =~ s/target=\"?_parent\"?//is;
|
|---|
| 528 |
|
|---|
| 529 | return $front . $link . $back if $link =~ /^\#/s;
|
|---|
| 530 | $link =~ s/\n/ /g;
|
|---|
| 531 |
|
|---|
| 532 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
|
|---|
| 533 | # href may use '\'s where '/'s should be on Windows
|
|---|
| 534 | $href =~ s/\\/\//g;
|
|---|
| 535 |
|
|---|
| 536 | my ($filename) = $href =~ /^(?:.*?):(?:\/\/)?(.*)/;
|
|---|
| 537 |
|
|---|
| 538 |
|
|---|
| 539 | ##### leave all these links alone (they won't be picked up by intermediate
|
|---|
| 540 | ##### pages). I think that's safest when dealing with frames, targets etc.
|
|---|
| 541 | ##### (at least until I think of a better way to do it). Problems occur with
|
|---|
| 542 | ##### mailto links from within small frames, the intermediate page is displayed
|
|---|
| 543 | ##### within that frame and can't be seen. There is still potential for this to
|
|---|
| 544 | ##### happen even with html pages - the solution seems to be to somehow tell
|
|---|
| 545 | ##### the browser from the server side to display the page being sent (i.e.
|
|---|
| 546 | ##### the intermediate page) in the top level window - I'm not sure if that's
|
|---|
| 547 | ##### possible - the following line should probably be deleted if that can be done
|
|---|
| 548 | return $front . $link . $back if $href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/is;
|
|---|
| 549 |
|
|---|
| 550 |
|
|---|
| 551 | if (($rl == 0) || ($filename =~ /$self->{'process_exp'}/) ||
|
|---|
| 552 | ($href =~ /\/$/) || ($href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/i)) {
|
|---|
| 553 | &ghtml::urlsafe ($href);
|
|---|
| 554 | return $front . "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part . $back;
|
|---|
| 555 | } else {
|
|---|
| 556 | # link is to some other type of file (eg image) so we'll
|
|---|
| 557 | # need to associate that file
|
|---|
| 558 | return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
|
|---|
| 559 | }
|
|---|
| 560 | }
|
|---|
| 561 |
|
|---|
| 562 | sub add_file {
|
|---|
| 563 | my $self = shift (@_);
|
|---|
| 564 | my ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) = @_;
|
|---|
| 565 | my ($newname);
|
|---|
| 566 |
|
|---|
| 567 | my $filename = $href;
|
|---|
| 568 | if ($base_dir eq "") {
|
|---|
| 569 | # remove http:/ thereby leaving one slash at the start
|
|---|
| 570 | $filename =~ s/^[^:]*:\///;
|
|---|
| 571 | }
|
|---|
| 572 | else {
|
|---|
| 573 | # remove http://
|
|---|
| 574 | $filename =~ s/^[^:]*:\/\///;
|
|---|
| 575 | }
|
|---|
| 576 |
|
|---|
| 577 | $filename = &util::filename_cat($base_dir, $filename);
|
|---|
| 578 |
|
|---|
| 579 | # Replace %20's in URL with a space if required. Note that the filename
|
|---|
| 580 | # may include the %20 in some situations
|
|---|
| 581 | if ($filename =~ /\%20/) {
|
|---|
| 582 | if (!-e $filename) {
|
|---|
| 583 | $filename =~ s/\%20/ /g;
|
|---|
| 584 | }
|
|---|
| 585 | }
|
|---|
| 586 |
|
|---|
| 587 | my ($ext) = $filename =~ /(\.[^\.]*)$/;
|
|---|
| 588 |
|
|---|
| 589 | if ($rl == 0) {
|
|---|
| 590 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
|---|
| 591 | return "_httpextlink_&rl=0&el=prompt&href=" . $href . $hash_part;
|
|---|
| 592 | }
|
|---|
| 593 | else {
|
|---|
| 594 | return "_httpextlink_&rl=0&el=direct&href=" . $href . $hash_part;
|
|---|
| 595 | }
|
|---|
| 596 | }
|
|---|
| 597 |
|
|---|
| 598 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
|---|
| 599 | return "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part;
|
|---|
| 600 | }
|
|---|
| 601 | if ($self->{'rename_assoc_files'}) {
|
|---|
| 602 | if (defined $self->{'aux_files'}->{$href}) {
|
|---|
| 603 | $newname = $self->{'aux_files'}->{$href}->{'dir_num'} . "/" .
|
|---|
| 604 | $self->{'aux_files'}->{$href}->{'file_num'} . $ext;
|
|---|
| 605 | } else {
|
|---|
| 606 | $newname = $self->{'dir_num'} . "/" . $self->{'file_num'} . $ext;
|
|---|
| 607 | $self->{'aux_files'}->{$href} = {'dir_num' => $self->{'dir_num'}, 'file_num' => $self->{'file_num'}};
|
|---|
| 608 | $self->inc_filecount ();
|
|---|
| 609 | }
|
|---|
| 610 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
|---|
| 611 | return "_httpdocimg_/$newname";
|
|---|
| 612 | } else {
|
|---|
| 613 | ($newname) = $filename =~ /([^\/\\]*)$/;
|
|---|
| 614 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
|---|
| 615 | return "_httpdocimg_/$newname";
|
|---|
| 616 | }
|
|---|
| 617 | }
|
|---|
| 618 |
|
|---|
| 619 |
|
|---|
| 620 | sub format_link {
|
|---|
| 621 | my $self = shift (@_);
|
|---|
| 622 | my ($link, $base_dir, $file) = @_;
|
|---|
| 623 |
|
|---|
| 624 | my ($before_hash, $hash_part) = $link =~ /^([^\#]*)(\#?.*)$/;
|
|---|
| 625 |
|
|---|
| 626 | $hash_part = "" if !defined $hash_part;
|
|---|
| 627 | if (!defined $before_hash || $before_hash !~ /[\w\.\/]/) {
|
|---|
| 628 | my $outhandle = $self->{'outhandle'};
|
|---|
| 629 | print $outhandle "HTMLPlug: ERROR - badly formatted tag ignored ($link)\n"
|
|---|
| 630 | if $self->{'verbosity'};
|
|---|
| 631 | return ($link, "", 0);
|
|---|
| 632 | }
|
|---|
| 633 |
|
|---|
| 634 | if ($before_hash =~ s@^((?:http|ftp|file)://)@@i) {
|
|---|
| 635 | my $type = $1;
|
|---|
| 636 |
|
|---|
| 637 | if ($link =~ /^(http|ftp):/i) {
|
|---|
| 638 | # Turn url (using /) into file name (possibly using \ on windows)
|
|---|
| 639 | my @http_dir_split = split('/', $before_hash);
|
|---|
| 640 | $before_hash = &util::filename_cat(@http_dir_split);
|
|---|
| 641 | }
|
|---|
| 642 |
|
|---|
| 643 | $before_hash = $self->eval_dir_dots($before_hash);
|
|---|
| 644 |
|
|---|
| 645 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
|---|
| 646 |
|
|---|
| 647 | my $rl = 0;
|
|---|
| 648 | $rl = 1 if (-e $linkfilename);
|
|---|
| 649 |
|
|---|
| 650 | # make sure there's a slash on the end if it's a directory
|
|---|
| 651 | if ($before_hash !~ /\/$/) {
|
|---|
| 652 | $before_hash .= "/" if (-d $linkfilename);
|
|---|
| 653 | }
|
|---|
| 654 |
|
|---|
| 655 | return ($type . $before_hash, $hash_part, $rl);
|
|---|
| 656 |
|
|---|
| 657 | } elsif ($link !~ /^(mailto|news|gopher|nntp|telnet|javascript):/i && $link !~ /^\//) {
|
|---|
| 658 | if ($before_hash =~ s@^/@@ || $before_hash =~ /\\/) {
|
|---|
| 659 |
|
|---|
| 660 | # the first directory will be the domain name if file_is_url
|
|---|
| 661 | # to generate archives, otherwise we'll assume all files are
|
|---|
| 662 | # from the same site and base_dir is the root
|
|---|
| 663 |
|
|---|
| 664 | if ($self->{'file_is_url'}) {
|
|---|
| 665 | my @dirs = split /[\/\\]/, $file;
|
|---|
| 666 | my $domname = shift (@dirs);
|
|---|
| 667 | $before_hash = &util::filename_cat($domname, $before_hash);
|
|---|
| 668 | $before_hash =~ s@\\@/@g; # for windows
|
|---|
| 669 | }
|
|---|
| 670 | else
|
|---|
| 671 | {
|
|---|
| 672 | # see if link shares directory with source document
|
|---|
| 673 | # => turn into relative link if this is so!
|
|---|
| 674 |
|
|---|
| 675 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
|
|---|
| 676 | # too difficult doing a pattern match with embedded '\'s...
|
|---|
| 677 | my $win_before_hash=$before_hash;
|
|---|
| 678 | $win_before_hash =~ s@(\\)+@/@g;
|
|---|
| 679 | # $base_dir is already similarly "converted" on windows.
|
|---|
| 680 | if ($win_before_hash =~ s@^$base_dir/@@o) {
|
|---|
| 681 | # if this is true, we removed a prefix
|
|---|
| 682 | $before_hash=$win_before_hash;
|
|---|
| 683 | }
|
|---|
| 684 | }
|
|---|
| 685 | else {
|
|---|
| 686 | # before_hash has lost leading slash by this point,
|
|---|
| 687 | # -> add back in prior to substitution with $base_dir
|
|---|
| 688 | $before_hash = "/$before_hash";
|
|---|
| 689 |
|
|---|
| 690 | $before_hash = &util::filename_cat("",$before_hash);
|
|---|
| 691 | $before_hash =~ s@^$base_dir/@@;
|
|---|
| 692 | }
|
|---|
| 693 | }
|
|---|
| 694 | } else {
|
|---|
| 695 | # Turn relative file path into full path
|
|---|
| 696 | my $dirname = &File::Basename::dirname($file);
|
|---|
| 697 | $before_hash = &util::filename_cat($dirname, $before_hash);
|
|---|
| 698 | $before_hash = $self->eval_dir_dots($before_hash);
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
|---|
| 702 | # make sure there's a slash on the end if it's a directory
|
|---|
| 703 | if ($before_hash !~ /\/$/) {
|
|---|
| 704 | $before_hash .= "/" if (-d $linkfilename);
|
|---|
| 705 | }
|
|---|
| 706 | return ("http://" . $before_hash, $hash_part, 1);
|
|---|
| 707 | } else {
|
|---|
| 708 | # mailto, news, nntp, telnet, javascript or gopher link
|
|---|
| 709 | return ($before_hash, "", 0);
|
|---|
| 710 | }
|
|---|
| 711 | }
|
|---|
| 712 |
|
|---|
| 713 | sub extract_first_NNNN_characters {
|
|---|
| 714 | my $self = shift (@_);
|
|---|
| 715 | my ($textref, $doc_obj, $thissection) = @_;
|
|---|
| 716 |
|
|---|
| 717 | foreach my $size (split /,/, $self->{'first'}) {
|
|---|
| 718 | my $tmptext = $$textref;
|
|---|
| 719 | # skip to the body
|
|---|
| 720 | $tmptext =~ s/.*<body[^>]*>//i;
|
|---|
| 721 | # remove javascript
|
|---|
| 722 | $tmptext =~ s@<script.*?</script>@ @sig;
|
|---|
| 723 | $tmptext =~ s/<[^>]*>/ /g;
|
|---|
| 724 | $tmptext =~ s/ / /g;
|
|---|
| 725 | $tmptext =~ s/^\s+//;
|
|---|
| 726 | $tmptext =~ s/\s+$//;
|
|---|
| 727 | $tmptext =~ s/\s+/ /gs;
|
|---|
| 728 | $tmptext = &unicode::substr ($tmptext, 0, $size);
|
|---|
| 729 | $tmptext =~ s/\s\S*$/…/; # adds an ellipse (...)
|
|---|
| 730 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
|---|
| 731 | }
|
|---|
| 732 | }
|
|---|
| 733 |
|
|---|
| 734 |
|
|---|
| 735 | sub extract_metadata {
|
|---|
| 736 | my $self = shift (@_);
|
|---|
| 737 | my ($textref, $metadata, $doc_obj, $section) = @_;
|
|---|
| 738 | my $outhandle = $self->{'outhandle'};
|
|---|
| 739 | # if we don't want metadata, we may as well not be here ...
|
|---|
| 740 | return if (!defined $self->{'metadata_fields'} && $self->{'hunt_creator_metadata'} == 0);
|
|---|
| 741 |
|
|---|
| 742 | # metadata fields to extract/save. 'key' is the (lowercase) name of the
|
|---|
| 743 | # html meta, 'value' is the metadata name for greenstone to use
|
|---|
| 744 | my %find_fields = ();
|
|---|
| 745 |
|
|---|
| 746 | my %creator_fields = (); # short-cut for lookups
|
|---|
| 747 |
|
|---|
| 748 |
|
|---|
| 749 | foreach my $field (split /,/, $self->{'metadata_fields'}) {
|
|---|
| 750 | # support tag<tagname>
|
|---|
| 751 | if ($field =~ /^(.*?)<(.*?)>$/) {
|
|---|
| 752 | # "$2" is the user's preferred gs metadata name
|
|---|
| 753 | $find_fields{lc($1)}=$2; # lc = lowercase
|
|---|
| 754 | } else { # no <tagname> for mapping
|
|---|
| 755 | # "$field" is the user's preferred gs metadata name
|
|---|
| 756 | $find_fields{lc($field)}=$field; # lc = lowercase
|
|---|
| 757 | }
|
|---|
| 758 | }
|
|---|
| 759 |
|
|---|
| 760 | if ($self->{'hunt_creator_metadata'} == 1 ) {
|
|---|
| 761 | my @extra_fields =
|
|---|
| 762 | (
|
|---|
| 763 | 'author',
|
|---|
| 764 | 'author.email',
|
|---|
| 765 | 'creator',
|
|---|
| 766 | 'dc.creator',
|
|---|
| 767 | 'dc.creator.corporatename',
|
|---|
| 768 | );
|
|---|
| 769 |
|
|---|
| 770 | # add the creator_metadata fields to search for
|
|---|
| 771 | foreach my $field (@extra_fields) {
|
|---|
| 772 | $creator_fields{$field}=0; # add to lookup hash
|
|---|
| 773 | }
|
|---|
| 774 | }
|
|---|
| 775 |
|
|---|
| 776 |
|
|---|
| 777 | # find the header in the html file, which has the meta tags
|
|---|
| 778 | $$textref =~ m@<head>(.*?)</head>@si;
|
|---|
| 779 |
|
|---|
| 780 | my $html_header=$1;
|
|---|
| 781 |
|
|---|
| 782 | # go through every <meta... tag defined in the html and see if it is
|
|---|
| 783 | # one of the tags we want to match.
|
|---|
| 784 |
|
|---|
| 785 | # special case for title - we want to remember if its been found
|
|---|
| 786 | my $found_title = 0;
|
|---|
| 787 | # this assumes that ">" won't appear. (I don't think it's allowed to...)
|
|---|
| 788 | $html_header =~ /^/; # match the start of the string, for \G assertion
|
|---|
| 789 |
|
|---|
| 790 | while ($html_header =~ m/\G.*?<meta(.*?)>/sig) {
|
|---|
| 791 | my $metatag=$1;
|
|---|
| 792 | my ($tag, $value);
|
|---|
| 793 |
|
|---|
| 794 | # find the tag name
|
|---|
| 795 | $metatag =~ /(?:name|http-equiv)\s*=\s*([\"\'])?(.*?)\1/is;
|
|---|
| 796 | $tag=$2;
|
|---|
| 797 | # in case they're not using " or ', but they should...
|
|---|
| 798 | if (! $tag) {
|
|---|
| 799 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
|---|
| 800 | $tag=$1;
|
|---|
| 801 | }
|
|---|
| 802 |
|
|---|
| 803 | if (!defined $tag) {
|
|---|
| 804 | print $outhandle "HTMLPlug: can't find NAME in \"$metatag\"\n";
|
|---|
| 805 | next;
|
|---|
| 806 | }
|
|---|
| 807 |
|
|---|
| 808 | # don't need to assign this field if it was passed in from a previous
|
|---|
| 809 | # (recursive) plugin
|
|---|
| 810 | if (defined $metadata->{$tag}) {next}
|
|---|
| 811 |
|
|---|
| 812 | # find the tag content
|
|---|
| 813 | $metatag =~ /content\s*=\s*([\"\'])?(.*?)\1/is;
|
|---|
| 814 | $value=$2;
|
|---|
| 815 |
|
|---|
| 816 | if (! $value) {
|
|---|
| 817 | $metatag =~ /(?:name|http-equiv)\s*=\s*([^\s\>]+)/is;
|
|---|
| 818 | $value=$1;
|
|---|
| 819 | }
|
|---|
| 820 | if (!defined $value) {
|
|---|
| 821 | print $outhandle "HTMLPlug: can't find VALUE in \"$metatag\"\n";
|
|---|
| 822 | next;
|
|---|
| 823 | }
|
|---|
| 824 |
|
|---|
| 825 | # clean up and add
|
|---|
| 826 | $value =~ s/\s+/ /gs;
|
|---|
| 827 | chomp($value); # remove trailing \n, if any
|
|---|
| 828 | if (exists $creator_fields{lc($tag)}) {
|
|---|
| 829 | # map this value onto greenstone's "Creator" metadata
|
|---|
| 830 | $tag='Creator';
|
|---|
| 831 | } elsif (!exists $find_fields{lc($tag)}) {
|
|---|
| 832 | next; # don't want this tag
|
|---|
| 833 | } else {
|
|---|
| 834 | # get the user's preferred capitalisation
|
|---|
| 835 | $tag = $find_fields{lc($tag)};
|
|---|
| 836 | }
|
|---|
| 837 | if (lc($tag) eq "title") {
|
|---|
| 838 | $found_title = 1;
|
|---|
| 839 | }
|
|---|
| 840 | print $outhandle " extracted \"$tag\" metadata \"$value\"\n"
|
|---|
| 841 | if ($self->{'verbosity'} > 2);
|
|---|
| 842 | if ($tag =~ /date.*/i){
|
|---|
| 843 | $tag = lc($tag);
|
|---|
| 844 | }
|
|---|
| 845 | $doc_obj->add_utf8_metadata($section, $tag, $value);
|
|---|
| 846 |
|
|---|
| 847 | }
|
|---|
| 848 |
|
|---|
| 849 | # TITLE: extract the document title
|
|---|
| 850 | if (exists $find_fields{'title'} && !$found_title) {
|
|---|
| 851 | # we want a title, and didn't find one in the meta tags
|
|---|
| 852 | # see if there's a <title> tag
|
|---|
| 853 | my $title;
|
|---|
| 854 | my $from = ""; # for debugging output only
|
|---|
| 855 | if ($html_header =~ /<title[^>]*>([^<]+)<\/title[^>]*>/is) {
|
|---|
| 856 | $title = $1;
|
|---|
| 857 | $from = "<title> tags";
|
|---|
| 858 | }
|
|---|
| 859 |
|
|---|
| 860 | if (!defined $title) {
|
|---|
| 861 | $from = "first 100 chars";
|
|---|
| 862 | # if no title use first 100 or so characters
|
|---|
| 863 | $title = $$textref;
|
|---|
| 864 | $title =~ s/^\xFE\xFF//; # Remove unicode byte order mark
|
|---|
| 865 | $title =~ s/^.*?<body>//si;
|
|---|
| 866 | # ignore javascript!
|
|---|
| 867 | $title =~ s@<script.*?</script>@ @sig;
|
|---|
| 868 | $title =~ s/<\/([^>]+)><\1>//g; # (eg) </b><b> - no space
|
|---|
| 869 | $title =~ s/<[^>]*>/ /g; # remove all HTML tags
|
|---|
| 870 | $title = substr ($title, 0, 100);
|
|---|
| 871 | $title =~ s/\s\S*$/.../;
|
|---|
| 872 | }
|
|---|
| 873 | $title =~ s/<[^>]*>/ /g; # remove html tags
|
|---|
| 874 | $title =~ s/ / /g;
|
|---|
| 875 | $title =~ s/(?: |\xc2\xa0)/ /g; # utf-8 for nbsp...
|
|---|
| 876 | $title =~ s/\s+/ /gs; # collapse multiple spaces
|
|---|
| 877 | $title =~ s/^\s*//; # remove leading spaces
|
|---|
| 878 | $title =~ s/\s*$//; # remove trailing spaces
|
|---|
| 879 |
|
|---|
| 880 | $title =~ s/^$self->{'title_sub'}// if ($self->{'title_sub'});
|
|---|
| 881 | $title =~ s/^\s+//s; # in case title_sub introduced any...
|
|---|
| 882 | $doc_obj->add_utf8_metadata ($section, 'Title', $title);
|
|---|
| 883 | print $outhandle " extracted Title metadata \"$title\" from $from\n"
|
|---|
| 884 | if ($self->{'verbosity'} > 2);
|
|---|
| 885 | }
|
|---|
| 886 |
|
|---|
| 887 | # add FileFormat metadata
|
|---|
| 888 | $doc_obj->add_metadata($section,"FileFormat", "HTML");
|
|---|
| 889 |
|
|---|
| 890 | # Special, for metadata names such as tagH1 - extracts
|
|---|
| 891 | # the text between the first <H1> and </H1> tags into "H1" metadata.
|
|---|
| 892 |
|
|---|
| 893 | foreach my $field (keys %find_fields) {
|
|---|
| 894 | if ($field !~ /^tag([a-z0-9]+)$/i) {next}
|
|---|
| 895 | my $tag = $1;
|
|---|
| 896 | if ($$textref =~ m@<$tag[^>]*>(.*?)</$tag[^>]*>@g) {
|
|---|
| 897 | my $content = $1;
|
|---|
| 898 | $content =~ s/ / /g;
|
|---|
| 899 | $content =~ s/<[^>]*>/ /g;
|
|---|
| 900 | $content =~ s/^\s+//;
|
|---|
| 901 | $content =~ s/\s+$//;
|
|---|
| 902 | $content =~ s/\s+/ /gs;
|
|---|
| 903 | if ($content) {
|
|---|
| 904 | $tag=$find_fields{"tag$tag"}; # get the user's capitalisation
|
|---|
| 905 | $tag =~ s/^tag//i;
|
|---|
| 906 | $doc_obj->add_utf8_metadata ($section, $tag, $content);
|
|---|
| 907 | print $outhandle " extracted \"$tag\" metadata \"$content\"\n"
|
|---|
| 908 | if ($self->{'verbosity'} > 2);
|
|---|
| 909 | }
|
|---|
| 910 | }
|
|---|
| 911 | }
|
|---|
| 912 | }
|
|---|
| 913 |
|
|---|
| 914 |
|
|---|
| 915 | sub extract_style {
|
|---|
| 916 | my $self = shift (@_);
|
|---|
| 917 | my ($textref, $doc_obj, $section, $base_dir, $file) = @_;
|
|---|
| 918 | my $outhandle = $self->{'outhandle'};
|
|---|
| 919 |
|
|---|
| 920 | # find the header in the html file, which has the style info
|
|---|
| 921 | $$textref =~ m@<head>(.*?)</head>@si;
|
|---|
| 922 |
|
|---|
| 923 | my $html_header=$1;
|
|---|
| 924 | my $style_contents = "";
|
|---|
| 925 |
|
|---|
| 926 | # look for style tags
|
|---|
| 927 | $html_header =~ /^/; # match the start of the string, for \G assertion
|
|---|
| 928 | while ($html_header =~ m/\G.*?<(style|script|link)/sig) {
|
|---|
| 929 | my $tag_name = $1;
|
|---|
| 930 | if ($tag_name eq "style") {
|
|---|
| 931 | if ($html_header =~ m/\G([^>]*>[^<]+<\/style[^>]*>)/is) {
|
|---|
| 932 | $style_contents .= "\n<style";
|
|---|
| 933 | $style_contents .= $1;
|
|---|
| 934 | }
|
|---|
| 935 | }
|
|---|
| 936 | elsif ($tag_name eq "link") {
|
|---|
| 937 | $style_contents .= "\n<link";
|
|---|
| 938 | $html_header =~ m/\G(.*?>)/is;
|
|---|
| 939 | $style_contents .= $1;
|
|---|
| 940 | }
|
|---|
| 941 | elsif ($tag_name eq "script") {
|
|---|
| 942 | # bit more tricky cos it may or may not have content
|
|---|
| 943 | if ($html_header =~ m/\G([^>]*?src=[^>]*>)/is) {
|
|---|
| 944 | $style_contents .= "\n<script";
|
|---|
| 945 | $style_contents .= $1;
|
|---|
| 946 | } elsif ($html_header =~ m/\G([^>]*>[^<]+<\/script[^>]*>)/is) {
|
|---|
| 947 | $style_contents .= "\n<script";
|
|---|
| 948 | $style_contents .= $1;
|
|---|
| 949 | }
|
|---|
| 950 | }
|
|---|
| 951 | }
|
|---|
| 952 |
|
|---|
| 953 | # now we need to do something with any links found in the style thing
|
|---|
| 954 | $style_contents =~ s/(<(?:link|script)\s+[^>]*?\s*(?:href|src)\s*=\s*[\"\']?)([^\"\'>\s]+)([\"\']?[^>]*>)/
|
|---|
| 955 | $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $section)/isge;
|
|---|
| 956 |
|
|---|
| 957 | $doc_obj->add_utf8_metadata($section, "DocumentHeader", $style_contents);
|
|---|
| 958 |
|
|---|
| 959 | }
|
|---|
| 960 |
|
|---|
| 961 | # evaluate any "../" to next directory up
|
|---|
| 962 | # evaluate any "./" as here
|
|---|
| 963 | sub eval_dir_dots {
|
|---|
| 964 | my $self = shift (@_);
|
|---|
| 965 | my ($filename) = @_;
|
|---|
| 966 | my $dirsep_os = &util::get_os_dirsep();
|
|---|
| 967 | my @dirsep = split(/$dirsep_os/,$filename);
|
|---|
| 968 |
|
|---|
| 969 | my @eval_dirs = ();
|
|---|
| 970 | foreach my $d (@dirsep) {
|
|---|
| 971 | if ($d eq "..") {
|
|---|
| 972 | pop(@eval_dirs);
|
|---|
| 973 |
|
|---|
| 974 | } elsif ($d eq ".") {
|
|---|
| 975 | # do nothing!
|
|---|
| 976 |
|
|---|
| 977 | } else {
|
|---|
| 978 | push(@eval_dirs,$d);
|
|---|
| 979 | }
|
|---|
| 980 | }
|
|---|
| 981 |
|
|---|
| 982 | # Need to fiddle with number of elements in @eval_dirs if the
|
|---|
| 983 | # first one is the empty string. This is because of a
|
|---|
| 984 | # modification to util::filename_cat that supresses the addition
|
|---|
| 985 | # of a leading '/' character (or \ if windows) (intended to help
|
|---|
| 986 | # filename cat with relative paths) if the first entry in the
|
|---|
| 987 | # array is the empty string. Making the array start with *two*
|
|---|
| 988 | # empty strings is a way to defeat this "smart" option.
|
|---|
| 989 | #
|
|---|
| 990 | if (scalar(@eval_dirs) > 0) {
|
|---|
| 991 | if ($eval_dirs[0] eq ""){
|
|---|
| 992 | unshift(@eval_dirs,"");
|
|---|
| 993 | }
|
|---|
| 994 | }
|
|---|
| 995 | return &util::filename_cat(@eval_dirs);
|
|---|
| 996 | }
|
|---|
| 997 |
|
|---|
| 998 | sub replace_usemap_links {
|
|---|
| 999 | my $self = shift (@_);
|
|---|
| 1000 | my ($front, $link, $back) = @_;
|
|---|
| 1001 |
|
|---|
| 1002 | $link =~ s/^\.\///;
|
|---|
| 1003 | return $front . $link . $back;
|
|---|
| 1004 | }
|
|---|
| 1005 |
|
|---|
| 1006 | sub inc_filecount {
|
|---|
| 1007 | my $self = shift (@_);
|
|---|
| 1008 |
|
|---|
| 1009 | if ($self->{'file_num'} == 1000) {
|
|---|
| 1010 | $self->{'dir_num'} ++;
|
|---|
| 1011 | $self->{'file_num'} = 0;
|
|---|
| 1012 | } else {
|
|---|
| 1013 | $self->{'file_num'} ++;
|
|---|
| 1014 | }
|
|---|
| 1015 | }
|
|---|
| 1016 |
|
|---|
| 1017 |
|
|---|
| 1018 | # Extend the BasPlug read_file so that strings like é are
|
|---|
| 1019 | # converted to UTF8 internally.
|
|---|
| 1020 | #
|
|---|
| 1021 | # We don't convert < or > or & or " in case
|
|---|
| 1022 | # they interfere with the GML files
|
|---|
| 1023 |
|
|---|
| 1024 | sub read_file {
|
|---|
| 1025 | my ($self, $filename, $encoding, $language, $textref) = @_;
|
|---|
| 1026 |
|
|---|
| 1027 | &BasPlug::read_file($self, $filename, $encoding, $language, $textref);
|
|---|
| 1028 |
|
|---|
| 1029 | # Convert entities to their UTF8 equivalents
|
|---|
| 1030 | $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
|
|---|
| 1031 | $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1)/gseo;
|
|---|
| 1032 | $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
|
|---|
| 1033 | }
|
|---|
| 1034 |
|
|---|
| 1035 | 1;
|
|---|
