| 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 | # To use frames properly you'll need to use the WebPlug plugin.
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| 35 | #
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| 36 |
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| 37 |
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| 38 | package HTMLPlug;
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| 39 |
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| 40 | use BasPlug;
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| 41 | use ghtml;
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| 42 | use unicode;
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| 43 | use util;
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| 44 | use parsargv;
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| 45 |
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| 46 | sub BEGIN {
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| 47 | @ISA = ('BasPlug');
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| 48 | }
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| 49 |
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| 50 | sub print_usage {
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| 51 | print STDERR "\n usage: plugin HTMLPlug [options]\n\n";
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| 52 | print STDERR " options:\n";
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| 53 | print STDERR " -nolinks Don't make any attempt to trap links (setting this\n";
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| 54 | print STDERR " flag may improve speed of building/importing but\n";
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| 55 | print STDERR " any relative links within documents will be broken).\n";
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| 56 | print STDERR " -keep_head Don't remove headers from html files.\n";
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| 57 | print STDERR " -no_metadata Don't attempt to extract any metadata from files.\n";
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| 58 | print STDERR " -metadata_fields Comma separated list of metadata fields to attempt to
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| 59 | extract. Defaults to 'Title'.
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| 60 | Use 'tag<tagname>' to have the contents of the first
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| 61 | <tagname> pair put in a metadata element called
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| 62 | 'tagname'. Capitalise this as you want the metadata
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| 63 | capitalised in Greenstone, since the tag extraction
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| 64 | is case insensitive.\n";
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| 65 | print STDERR " -hunt_creator_metadata Find as much metadata as possible on authorship and
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| 66 | place it in the 'Creator' field. Requires the
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| 67 | -metadata_fields flag.\n";
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| 68 | print STDERR " -file_is_url Set if input filenames make up url of original source
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| 69 | documents e.g. if a web mirroring tool was used to
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| 70 | create the import directory structure\n";
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| 71 | print STDERR " -assoc_files Perl regular expression of file extensions to
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| 72 | associate with html documents.
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| 73 | Defaults to '(?i)\.(jpe?g|gif|png|css)\$'\n";
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| 74 | print STDERR " -rename_assoc_files Renames files associated with documents (e.g. images).
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| 75 | Also creates much shallower directory structure
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| 76 | (useful when creating collections to go on cd-rom).\n";
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| 77 | print STDERR " -title_sub Substitution expression to modify string stored as
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| 78 | Title. Used by, for example, PDFPlug to remove
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| 79 | \"Page 1\", etc from text used as the title.\n";
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| 80 | print STDERR " -description_tags Split document into sub-sections where <Section> tags
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| 81 | occur. Note that by setting this option you
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| 82 | implicitly set -no_metadata, as all metadata should
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| 83 | be included within the <Section> tags (this is only
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| 84 | true for documents that actually contain <Section> tags
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| 85 | however). Also, '-keep_head' will have no effect when
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| 86 | this option is set, regardless of whether a document
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| 87 | contains Section tags.\n";
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| 88 | }
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| 89 |
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| 90 | sub new {
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| 91 | my $class = shift (@_);
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| 92 | my $self = new BasPlug ($class, @_);
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| 93 |
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| 94 | if (!parsargv::parse(\@_,
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| 95 | q^nolinks^, \$self->{'nolinks'},
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| 96 | q^keep_head^, \$self->{'keep_head'},
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| 97 | q^no_metadata^, \$self->{'no_metadata'},
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| 98 | q^metadata_fields/.*/Title^, \$self->{'metadata_fields'},
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| 99 | q^hunt_creator_metadata^, \$self->{'hunt_creator_metadata'},
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| 100 | q^w3mir^, \$self->{'w3mir'},
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| 101 | q^file_is_url^, \$self->{'file_is_url'},
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| 102 | q^assoc_files/.*/(?i)\.(jpe?g|gif|png|css)$^, \$self->{'assoc_files'},
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| 103 | q^rename_assoc_files^, \$self->{'rename_assoc_files'},
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| 104 | q^title_sub/.*/^, \$self->{'title_sub'},
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| 105 | q^description_tags^, \$self->{'description_tags'},
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| 106 | "allow_extra_options")) {
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| 107 |
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| 108 | print STDERR "\nIncorrect options passed to HTMLPlug, check your collect.cfg configuration file\n";
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| 109 | &print_usage();
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| 110 | die "\n";
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| 111 | }
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| 112 |
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| 113 | # retain this for backward compatibility (w3mir option was replaced by
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| 114 | # file_is_url)
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| 115 | if ($self->{'w3mir'}) {
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| 116 | $self->{'file_is_url'} = 1;
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| 117 | }
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| 118 |
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| 119 | $self->{'aux_files'} = {};
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| 120 | $self->{'dir_num'} = 0;
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| 121 | $self->{'file_num'} = 0;
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| 122 | return bless $self, $class;
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| 123 | }
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| 124 |
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| 125 |
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| 126 | sub get_default_block_exp {
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| 127 | my $self = shift (@_);
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| 128 |
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| 129 | return q^(?i)\.(gif|jpe?g|png|css)$^;
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| 130 | }
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| 131 |
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| 132 | sub get_default_process_exp {
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| 133 | my $self = shift (@_);
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| 134 |
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| 135 | # the last option is an attempt to encode the concept of an html query ...
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| 136 | return q^(?i)(\.html?|\.shtml|\.shm|\.asp|\.php\d?|\.cgi|.+\?.+=.*)$^;
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| 137 | }
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| 138 |
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| 139 |
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| 140 | # do plugin specific processing of doc_obj
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| 141 | sub process {
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| 142 | my $self = shift (@_);
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| 143 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
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| 144 | my $outhandle = $self->{'outhandle'};
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| 145 | print $outhandle "HTMLPlug: processing $file\n"
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| 146 | if $self->{'verbosity'} > 1;
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| 147 |
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| 148 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
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| 149 | # this makes life so much easier... perl can cope with unix-style '/'s.
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| 150 | $base_dir =~ s@(\\)+@/@g;
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| 151 | $file =~ s@(\\)+@/@g;
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| 152 | }
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| 153 |
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| 154 | # reset per-doc stuff...
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| 155 | $self->{'aux_files'} = {};
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| 156 | $self->{'dir_num'} = 0;
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| 157 | $self->{'file_num'} = 0;
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| 158 |
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| 159 | my $cursection = $doc_obj->get_top_section();
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| 160 |
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| 161 | $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection)
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| 162 | unless $self->{'no_metadata'} || $self->{'description_tags'};
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| 163 |
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| 164 | # Store URL for page as metadata - this can be used for an
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| 165 | # altavista style search interface. The URL won't be valid
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| 166 | # unless the file structure contains the domain name (i.e.
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| 167 | # like when w3mir is used to download a website).
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| 168 | my $web_url = "http://$file";
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| 169 | $doc_obj->add_utf8_metadata($cursection, "URL", $web_url);
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| 170 |
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| 171 | if ($self->{'description_tags'}) {
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| 172 |
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| 173 | # remove the html header - note that doing this here means any
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| 174 | # sections defined within the header will be lost (so all <Section>
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| 175 | # tags must appear within the body of the HTML)
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| 176 | $$textref =~ s/^.*?<body[^>]*>//is;
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| 177 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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| 178 |
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| 179 | my $opencom = '(?:<!--|<!(?:—|—|--))';
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| 180 | my $closecom = '(?:-->|(?:—|—|--)>)';
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| 181 | my $lt = '(?:<|<)';
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| 182 | my $gt = '(?:>|>)';
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| 183 | my $quot = '(?:"|"|”|“)';
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| 184 |
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| 185 | my $found_something = 0; my $top = 1;
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| 186 | while ($$textref =~ s/^(.*?)$opencom(.*?)$closecom//s) {
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| 187 | my $text = $1;
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| 188 | my $comment = $2;
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| 189 | if (defined $text) {
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| 190 | # text before a comment - note that getting to here
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| 191 | # doesn't necessarily mean there are Section tags in
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| 192 | # the document
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| 193 | $self->process_section(\$text, $base_dir, $file, $doc_obj, $cursection);
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| 194 | }
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| 195 | while ($comment =~ s/$lt(.*?)$gt//s) {
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| 196 |
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| 197 | my $tag = $1;
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| 198 | if ($tag eq "Section") {
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| 199 | $found_something = 1;
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| 200 | $cursection = $doc_obj->insert_section($doc_obj->get_end_child($cursection)) unless $top;
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| 201 | $top = 0;
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| 202 | } elsif ($tag eq "/Section") {
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| 203 | $found_something = 1;
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| 204 | $cursection = $doc_obj->get_parent_section ($cursection);
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| 205 | } elsif ($tag =~ /^Metadata name=$quot(.*?)$quot/s) {
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| 206 | my $metaname = $1;
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| 207 | $comment =~ s/^(.*?)$lt\/Metadata$gt//s;
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| 208 | my $metavalue = $1;
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| 209 | $metavalue =~ s/^\s+//;
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| 210 | $metavalue =~ s/\s+$//;
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| 211 | # assume that no metadata value intentionally includes
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| 212 | # carriage returns or HTML tags (if they're there they
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| 213 | # were probably introduced when converting to HTML from
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| 214 | # some other format).
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| 215 | $metavalue =~ s/[\cJ\cM]/ /sg;
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| 216 | $metavalue =~ s/<[^>]+>//sg;
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| 217 | $metavalue =~ s/\s+/ /sg;
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| 218 | $doc_obj->set_utf8_metadata_element($cursection, $metaname, $metavalue);
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| 219 | } elsif ($tag eq "Description" || $tag eq "/Description") {
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| 220 | # do nothing with containing Description tags
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| 221 | } else {
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| 222 | # simple HTML tag (probably created by the conversion
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| 223 | # to HTML from some other format) - we'll ignore it and
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| 224 | # hope for the best ;-)
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| 225 | }
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| 226 | }
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| 227 | }
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| 228 | if ($cursection ne "") {
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| 229 | print $outhandle "HTMLPlug: WARNING: $file contains unmatched <Section></Section> tags\n";
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| 230 | }
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| 231 |
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| 232 | $$textref =~ s/^.*?<body[^>]*>//is;
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| 233 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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| 234 | if ($$textref =~ /\S/) {
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| 235 | if (!$found_something) {
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| 236 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags so\n";
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| 237 | print $outhandle " will be processed as a single section document\n";
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| 238 |
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| 239 | # go ahead and process single-section document
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| 240 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
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| 241 |
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| 242 | # if document contains no Section tags we'll go ahead
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| 243 | # and extract metadata (this won't have been done
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| 244 | # above as the -description_tags option prevents it)
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| 245 | $self->extract_metadata (\$doc_obj->get_text($cursection), $metadata, $doc_obj, $cursection)
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| 246 | unless $self->{'no_metadata'};
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| 247 |
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| 248 | } else {
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| 249 | print $outhandle "HTMLPlug: WARNING: $file contains the following text outside\n";
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| 250 | print $outhandle " of the final closing </Section> tag. This text will\n";
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| 251 | print $outhandle " be ignored.";
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| 252 | my ($text);
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| 253 | if (length($$textref) > 30) {
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| 254 | $text = substr($$textref, 0, 30) . "...";
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| 255 | } else {
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| 256 | $text = $$textref;
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| 257 | }
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| 258 | $text =~ s/\n/ /isg;
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| 259 | print $outhandle " ($text)\n";
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| 260 | }
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| 261 | } elsif (!$found_something) {
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| 262 |
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| 263 | # may get to here if document contained no valid Section
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| 264 | # tags but did contain some comments. The text will have
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| 265 | # been processed already but we should print the warning
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| 266 | # as above and extract metadata
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| 267 | print $outhandle "HTMLPlug: WARNING: $file appears to contain no Section tags so\n";
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| 268 | print $outhandle " will be processed as a single section document\n";
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| 269 |
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| 270 | $self->extract_metadata (\$doc_obj->get_text($cursection), $metadata, $doc_obj, $cursection)
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| 271 | unless $self->{'no_metadata'};
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| 272 | }
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| 273 |
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| 274 | } else {
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| 275 |
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| 276 | # remove header and footer
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| 277 | if (!$self->{'keep_head'} || $self->{'description_tags'}) {
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| 278 | $$textref =~ s/^.*?<body[^>]*>//is;
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| 279 | $$textref =~ s/(<\/body[^>]*>|<\/html[^>]*>)//isg;
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| 280 | }
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| 281 |
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| 282 | # single section document
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| 283 | $self->process_section($textref, $base_dir, $file, $doc_obj, $cursection);
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| 284 | }
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| 285 | return 1;
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| 286 | }
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| 287 |
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| 288 | # note that process_section may be called multiple times for a single
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| 289 | # section (relying on the fact that add_utf8_text appends the text to any
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| 290 | # that may exist already).
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| 291 | sub process_section {
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| 292 | my $self = shift (@_);
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| 293 | my ($textref, $base_dir, $file, $doc_obj, $cursection) = @_;
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| 294 | # trap links
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| 295 | if (!$self->{'nolinks'}) {
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| 296 |
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| 297 | # usemap="./#index" not handled correctly => change to "#index"
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| 298 | $$textref =~ s/(<img[^>]*?usemap\s*=\s*\"?)([^\">\s]+)(\"?[^>]*>)/
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| 299 | $self->replace_usemap_links($1, $2, $3)/isge;
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| 300 |
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| 301 | $$textref =~ s/(<(?:a|area|frame|link)\s+[^>]*?\s*(?:href|src)\s*=\s*\"?)([^\">\s]+)(\"?[^>]*>)/
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| 302 | $self->replace_href_links ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
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| 303 | }
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| 304 |
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| 305 | # trap images
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| 306 |
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| 307 | # allow spaces if inside quotes - jrm21
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| 308 | $$textref =~ s/(<img[^>]*?src\s*=\s*)(\"[^\"]+\"|[^\s>]+)([^>]*>)/
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| 309 | $self->replace_images ($1, $2, $3, $base_dir, $file, $doc_obj, $cursection)/isge;
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| 310 |
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| 311 | # add text to document object
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| 312 | # turn \ into \\ so that the rest of greenstone doesn't think there
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| 313 | # is an escape code following. (Macro parsing loses them...)
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| 314 | $$textref =~ s/\\/\\\\/go;
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| 315 | $doc_obj->add_utf8_text($cursection, $$textref);
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| 316 | }
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| 317 |
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| 318 | sub replace_images {
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| 319 | my $self = shift (@_);
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| 320 | my ($front, $link, $back, $base_dir,
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| 321 | $file, $doc_obj, $section) = @_;
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| 322 | # remove quotes from link at start and end if necessary
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| 323 | if ($link=~/^\"/) {
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| 324 | $link=~s/^\"//;$link=~s/\"$//;
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| 325 | $front.='"';
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| 326 | $back="\"$back";
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| 327 | }
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| 328 |
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| 329 | $link =~ s/\n/ /g;
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| 330 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
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| 331 | return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
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| 332 | }
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| 333 |
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| 334 | sub replace_href_links {
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| 335 | my $self = shift (@_);
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| 336 | my ($front, $link, $back, $base_dir, $file, $doc_obj, $section) = @_;
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| 337 |
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| 338 | # attempt to sort out targets - frames are not handled
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| 339 | # well in this plugin and some cases will screw things
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| 340 | # up - e.g. the _parent target (so we'll just remove
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| 341 | # them all ;-)
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| 342 | $front =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
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| 343 | $back =~ s/(target=\"?)_top(\"?)/$1_gsdltop_$2/is;
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| 344 | $front =~ s/target=\"?_parent\"?//is;
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| 345 | $back =~ s/target=\"?_parent\"?//is;
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| 346 |
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| 347 | return $front . $link . $back if $link =~ /^\#/s;
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| 348 | $link =~ s/\n/ /g;
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| 349 |
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| 350 | my ($href, $hash_part, $rl) = $self->format_link ($link, $base_dir, $file);
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| 351 | # href may use '\'s where '/'s should be on Windows
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| 352 | $href =~ s/\\/\//g;
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| 353 |
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| 354 | my ($filename) = $href =~ /^(?:.*?):(?:\/\/)?(.*)/;
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| 355 |
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| 356 | ##### leave all these links alone (they won't be picked up by intermediate
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| 357 | ##### pages). I think that's safest when dealing with frames, targets etc.
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| 358 | ##### (at least until I think of a better way to do it). Problems occur with
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| 359 | ##### mailto links from within small frames, the intermediate page is displayed
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| 360 | ##### within that frame and can't be seen. There is still potential for this to
|
|---|
| 361 | ##### happen even with html pages - the solution seems to be to somehow tell
|
|---|
| 362 | ##### the browser from the server side to display the page being sent (i.e.
|
|---|
| 363 | ##### the intermediate page) in the top level window - I'm not sure if that's
|
|---|
| 364 | ##### possible - the following line should probably be deleted if that can be done
|
|---|
| 365 | return $front . $link . $back if $href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/is;
|
|---|
| 366 |
|
|---|
| 367 |
|
|---|
| 368 | if (($rl == 0) || ($filename =~ /$self->{'process_exp'}/) ||
|
|---|
| 369 | ($href =~ /\/$/) || ($href =~ /^(mailto|news|gopher|nntp|telnet|javascript):/i)) {
|
|---|
| 370 | &ghtml::urlsafe ($href);
|
|---|
| 371 | return $front . "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part . $back;
|
|---|
| 372 |
|
|---|
| 373 | } else {
|
|---|
| 374 | # link is to some other type of file (eg image) so we'll
|
|---|
| 375 | # need to associate that file
|
|---|
| 376 | return $front . $self->add_file ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) . $back;
|
|---|
| 377 | }
|
|---|
| 378 | }
|
|---|
| 379 |
|
|---|
| 380 | sub add_file {
|
|---|
| 381 | my $self = shift (@_);
|
|---|
| 382 | my ($href, $rl, $hash_part, $base_dir, $doc_obj, $section) = @_;
|
|---|
| 383 | my ($newname);
|
|---|
| 384 |
|
|---|
| 385 | my $filename = $href;
|
|---|
| 386 | $filename =~ s/^[^:]*:\/\///;
|
|---|
| 387 | $filename = &util::filename_cat($base_dir, $filename);
|
|---|
| 388 |
|
|---|
| 389 | my ($ext) = $filename =~ /(\.[^\.]*)$/;
|
|---|
| 390 |
|
|---|
| 391 | if ((!defined $ext) || ($ext !~ /$self->{'assoc_files'}/)) {
|
|---|
| 392 | return "_httpextlink_&rl=" . $rl . "&href=" . $href . $hash_part;
|
|---|
| 393 | }
|
|---|
| 394 |
|
|---|
| 395 | if ($self->{'rename_assoc_files'}) {
|
|---|
| 396 | if (defined $self->{'aux_files'}->{$href}) {
|
|---|
| 397 | $newname = $self->{'aux_files'}->{$href}->{'dir_num'} . "/" .
|
|---|
| 398 | $self->{'aux_files'}->{$href}->{'file_num'} . $ext;
|
|---|
| 399 | } else {
|
|---|
| 400 | $newname = $self->{'dir_num'} . "/" . $self->{'file_num'} . $ext;
|
|---|
| 401 | $self->{'aux_files'}->{$href} = {'dir_num' => $self->{'dir_num'}, 'file_num' => $self->{'file_num'}};
|
|---|
| 402 | $self->inc_filecount ();
|
|---|
| 403 | }
|
|---|
| 404 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
|---|
| 405 | return "_httpdocimg_/$newname";
|
|---|
| 406 |
|
|---|
| 407 | } else {
|
|---|
| 408 | ($newname) = $filename =~ /([^\/\\]*)$/;
|
|---|
| 409 | $doc_obj->associate_file($filename, $newname, undef, $section);
|
|---|
| 410 | return "_httpdocimg_/$newname";
|
|---|
| 411 | }
|
|---|
| 412 | }
|
|---|
| 413 |
|
|---|
| 414 |
|
|---|
| 415 | sub format_link {
|
|---|
| 416 | my $self = shift (@_);
|
|---|
| 417 | my ($link, $base_dir, $file) = @_;
|
|---|
| 418 |
|
|---|
| 419 | my ($before_hash, $hash_part) = $link =~ /^([^\#]*)(\#?.*)$/;
|
|---|
| 420 |
|
|---|
| 421 | $hash_part = "" if !defined $hash_part;
|
|---|
| 422 | if (!defined $before_hash || $before_hash !~ /[\w\.\/]/) {
|
|---|
| 423 | my $outhandle = $self->{'outhandle'};
|
|---|
| 424 | print $outhandle "HTMLPlug: ERROR - badly formatted tag ignored ($link)\n"
|
|---|
| 425 | if $self->{'verbosity'};
|
|---|
| 426 | return ($link, "", 0);
|
|---|
| 427 | }
|
|---|
| 428 |
|
|---|
| 429 | if ($before_hash =~ s@^((?:http|ftp|file)://)@@i) {
|
|---|
| 430 | my $type = $1;
|
|---|
| 431 |
|
|---|
| 432 | if ($link =~ /^(http|ftp):/i) {
|
|---|
| 433 | # Turn url (using /) into file name (possibly using \ on windows)
|
|---|
| 434 | my @http_dir_split = split('/', $before_hash);
|
|---|
| 435 | $before_hash = &util::filename_cat(@http_dir_split);
|
|---|
| 436 | }
|
|---|
| 437 |
|
|---|
| 438 | $before_hash = $self->eval_dir_dots($before_hash);
|
|---|
| 439 |
|
|---|
| 440 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
|---|
| 441 |
|
|---|
| 442 | my $rl = 0;
|
|---|
| 443 | $rl = 1 if (-e $linkfilename);
|
|---|
| 444 |
|
|---|
| 445 | # make sure there's a slash on the end if it's a directory
|
|---|
| 446 | if ($before_hash !~ /\/$/) {
|
|---|
| 447 | $before_hash .= "/" if (-d $linkfilename);
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | return ($type . $before_hash, $hash_part, $rl);
|
|---|
| 451 |
|
|---|
| 452 | } elsif ($link !~ /^(mailto|news|gopher|nntp|telnet|javascript):/i) {
|
|---|
| 453 | if ($before_hash =~ s@^/@@ || $before_hash =~ /\\/) {
|
|---|
| 454 |
|
|---|
| 455 | # the first directory will be the domain name if file_is_url
|
|---|
| 456 | # to generate archives, otherwise we'll assume all files are
|
|---|
| 457 | # from the same site and base_dir is the root
|
|---|
| 458 |
|
|---|
| 459 | if ($self->{'file_is_url'}) {
|
|---|
| 460 | my @dirs = split /[\/\\]/, $file;
|
|---|
| 461 | my $domname = shift (@dirs);
|
|---|
| 462 | $before_hash = &util::filename_cat($domname, $before_hash);
|
|---|
| 463 | $before_hash =~ s@\\@/@g; # for windows
|
|---|
| 464 | }
|
|---|
| 465 | else
|
|---|
| 466 | {
|
|---|
| 467 | # see if link shares directory with source document
|
|---|
| 468 | # => turn into relative link if this is so!
|
|---|
| 469 |
|
|---|
| 470 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
|
|---|
| 471 | # too difficult doing a pattern match with embedded '\'s...
|
|---|
| 472 | my $win_before_hash=$before_hash;
|
|---|
| 473 | $win_before_hash =~ s@(\\)+@/@g;
|
|---|
| 474 | # $base_dir is already similarly "converted" on windows.
|
|---|
| 475 | if ($win_before_hash =~ s@^$base_dir/@@o) {
|
|---|
| 476 | # if this is true, we removed a prefix
|
|---|
| 477 | $before_hash=$win_before_hash;
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 | }
|
|---|
| 481 | else {
|
|---|
| 482 | $before_hash = &util::filename_cat("",$before_hash);
|
|---|
| 483 | $before_hash =~ s@^$base_dir/@@;
|
|---|
| 484 | }
|
|---|
| 485 |
|
|---|
| 486 | }
|
|---|
| 487 |
|
|---|
| 488 | } else {
|
|---|
| 489 | # Turn relative file path into full path
|
|---|
| 490 | my $dirname = &File::Basename::dirname($file);
|
|---|
| 491 | $before_hash = &util::filename_cat($dirname, $before_hash);
|
|---|
| 492 | $before_hash = $self->eval_dir_dots($before_hash);
|
|---|
| 493 | }
|
|---|
| 494 |
|
|---|
| 495 | my $linkfilename = &util::filename_cat ($base_dir, $before_hash);
|
|---|
| 496 |
|
|---|
| 497 | # make sure there's a slash on the end if it's a directory
|
|---|
| 498 | if ($before_hash !~ /\/$/) {
|
|---|
| 499 | $before_hash .= "/" if (-d $linkfilename);
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 | return ("http://" . $before_hash, $hash_part, 1);
|
|---|
| 503 |
|
|---|
| 504 | } else {
|
|---|
| 505 | # mailto, news, nntp, telnet, javascript or gopher link
|
|---|
| 506 | return ($before_hash, "", 0);
|
|---|
| 507 | }
|
|---|
| 508 | }
|
|---|
| 509 |
|
|---|
| 510 | sub extract_first_NNNN_characters {
|
|---|
| 511 | my $self = shift (@_);
|
|---|
| 512 | my ($textref, $doc_obj, $thissection) = @_;
|
|---|
| 513 |
|
|---|
| 514 | foreach my $size (split /,/, $self->{'first'}) {
|
|---|
| 515 | my $tmptext = $$textref;
|
|---|
| 516 | $tmptext =~ s/.*<body[^>]*>//i;
|
|---|
| 517 | $tmptext =~ s/$self->{'title_sub'}// if ($self->{'title_sub'});
|
|---|
| 518 | $tmptext =~ s/<[^>]*>/ /g;
|
|---|
| 519 | $tmptext =~ s/ / /g;
|
|---|
| 520 | $tmptext =~ s/^\s+//;
|
|---|
| 521 | $tmptext =~ s/\s+$//;
|
|---|
| 522 | $tmptext =~ s/\s+/ /gs;
|
|---|
| 523 | $tmptext = substr ($tmptext, 0, $size);
|
|---|
| 524 | $tmptext =~ s/\s\S*$/…/;
|
|---|
| 525 | $doc_obj->add_utf8_metadata ($thissection, "First$size", $tmptext);
|
|---|
| 526 | }
|
|---|
| 527 | }
|
|---|
| 528 |
|
|---|
| 529 | sub extract_metadata {
|
|---|
| 530 | my $self = shift (@_);
|
|---|
| 531 | my ($textref, $metadata, $doc_obj, $section) = @_;
|
|---|
| 532 | my $outhandle = $self->{'outhandle'};
|
|---|
| 533 |
|
|---|
| 534 | # if we don't want metadata, we may as well not be here ...
|
|---|
| 535 | return if (!defined $self->{'metadata_fields'});
|
|---|
| 536 |
|
|---|
| 537 | # hunt for an author look in the metadata elements:
|
|---|
| 538 | if (defined $self->{'hunt_creator_metadata'}) {
|
|---|
| 539 | for my $name (split /,/, "AUTHOR,AUTHOR.EMAIL,CREATOR,DC.CREATOR,DC.CREATOR.CORPORATENAME") {
|
|---|
| 540 | if ($$textref =~ /<meta(\s*?)(?:name|http-equiv)\s*=\s*\"?$name\"?([^>]*)/is) {
|
|---|
| 541 | my $content = $1 . $2;
|
|---|
| 542 | if ($content =~ /content\s*=\s*\"?(.*)\"?/is) {
|
|---|
| 543 | if (defined $1) {
|
|---|
| 544 | my $value = $1;
|
|---|
| 545 | $value =~ s/\"$//;
|
|---|
| 546 | $value =~ s/\s+/ /gs;
|
|---|
| 547 | $doc_obj->add_utf8_metadata($section, "Creator", $value);
|
|---|
| 548 | print $outhandle " extracted Creator metadata \"$value\"\n"
|
|---|
| 549 | if ($self->{'verbosity'} > 2);
|
|---|
| 550 | next;
|
|---|
| 551 | }
|
|---|
| 552 | }
|
|---|
| 553 | }
|
|---|
| 554 | }
|
|---|
| 555 | }
|
|---|
| 556 |
|
|---|
| 557 | foreach my $field (split /,/, $self->{'metadata_fields'}) {
|
|---|
| 558 |
|
|---|
| 559 | # don't need to extract field if it was passed in from a previous
|
|---|
| 560 | # (recursive) plugin
|
|---|
| 561 | next if defined $metadata->{$field};
|
|---|
| 562 |
|
|---|
| 563 | # see if there's a <meta> tag for this field
|
|---|
| 564 | if ($$textref =~ /<meta(\s*?)(?:name|http-equiv)\s*=\s*\"?$field\"?([^>]*)/is) {
|
|---|
| 565 | my $content = $1 . $2;
|
|---|
| 566 | if ($content =~ /content\s*=\s*\"?(.*)\"?/is) {
|
|---|
| 567 | if (defined $1) {
|
|---|
| 568 | my $value = $1;
|
|---|
| 569 | $value =~ s/\"$//;
|
|---|
| 570 | $value =~ s/\s+/ /gs;
|
|---|
| 571 | $value =~ s/\".*//gs;
|
|---|
| 572 | $doc_obj->add_utf8_metadata($section, $field, $value);
|
|---|
| 573 | print $outhandle " extracted \"$field\" metadata \"$value\"\n"
|
|---|
| 574 | if ($self->{'verbosity'} > 2);
|
|---|
| 575 | next;
|
|---|
| 576 | }
|
|---|
| 577 | }
|
|---|
| 578 | }
|
|---|
| 579 |
|
|---|
| 580 | # TITLE: extract the document title
|
|---|
| 581 |
|
|---|
| 582 | if ($field =~ /^title$/i) {
|
|---|
| 583 |
|
|---|
| 584 | # see if there's a <title> tag
|
|---|
| 585 | if ($$textref =~ /<title[^>]*>([^<]*)<\/title[^>]*>/is) {
|
|---|
| 586 | if (defined $1) {
|
|---|
| 587 | my $title = $1;
|
|---|
| 588 | if ($title =~ /\w/) {
|
|---|
| 589 | $title =~ s/<[^>]*>/ /g;
|
|---|
| 590 | $title =~ s/ / /g;
|
|---|
| 591 | $title =~ s/\s+/ /gs;
|
|---|
| 592 | $title =~ s/^\s+//;
|
|---|
| 593 | $title =~ s/\s+$//;
|
|---|
| 594 | $doc_obj->add_utf8_metadata ($section, $field, $title);
|
|---|
| 595 | print $outhandle " extracted \"$field\" metadata \"$title\"\n"
|
|---|
| 596 | if ($self->{'verbosity'} > 2);
|
|---|
| 597 | next;
|
|---|
| 598 | }
|
|---|
| 599 | }
|
|---|
| 600 | }
|
|---|
| 601 |
|
|---|
| 602 | # if no title use first 100 characters
|
|---|
| 603 | my $tmptext = $$textref;
|
|---|
| 604 | $tmptext =~ s/<\/([^>]+)><\1>//g; # (eg) </b><b> - no space
|
|---|
| 605 | $tmptext =~ s/<[^>]*>/ /g;
|
|---|
| 606 | $tmptext =~ s/(?: |\xc2\xa0)/ /g; # utf-8 for nbsp...
|
|---|
| 607 | $tmptext =~ s/^\s+//s;
|
|---|
| 608 | $tmptext =~ s/\s+$//;
|
|---|
| 609 | $tmptext =~ s/\s+/ /gs;
|
|---|
| 610 | $tmptext =~ s/^$self->{'title_sub'}// if ($self->{'title_sub'});
|
|---|
| 611 | $tmptext =~ s/^\s+//s; # in case title_sub introduced any...
|
|---|
| 612 | $tmptext = substr ($tmptext, 0, 100);
|
|---|
| 613 | $tmptext =~ s/\s\S*$/.../;
|
|---|
| 614 | $doc_obj->add_utf8_metadata ($section, $field, $tmptext);
|
|---|
| 615 | print $outhandle " extracted \"$field\" metadata \"$tmptext\"\n"
|
|---|
| 616 | if ($self->{'verbosity'} > 2);
|
|---|
| 617 | next;
|
|---|
| 618 | }
|
|---|
| 619 |
|
|---|
| 620 |
|
|---|
| 621 | # tag: extract the text between the first <H1> and </H1> tags
|
|---|
| 622 | if ($field =~ /^tag[a-z0-9]+$/i) {
|
|---|
| 623 |
|
|---|
| 624 | my $tag = $field;
|
|---|
| 625 | $tag =~ s/^tag//i;
|
|---|
| 626 | my $tmptext = $$textref;
|
|---|
| 627 | $tmptext =~ s/\s+/ /gs;
|
|---|
| 628 | if ($tmptext =~ /<$tag[^>]*>/i) {
|
|---|
| 629 | foreach my $word ($tmptext =~ m/<$tag[^>]*>(.*?)<\/$tag[^>]*>/g) {
|
|---|
| 630 | $word =~ s/ / /g;
|
|---|
| 631 | $word =~ s/<[^>]*>/ /g;
|
|---|
| 632 | $word =~ s/^\s+//;
|
|---|
| 633 | $word =~ s/\s+$//;
|
|---|
| 634 | $word =~ s/\s+/ /gs;
|
|---|
| 635 | if ($word ne "") {
|
|---|
| 636 | $doc_obj->add_utf8_metadata ($section, $tag, $word);
|
|---|
| 637 | print $outhandle " extracted \"$tag\" metadata \"$word\"\n"
|
|---|
| 638 | if ($self->{'verbosity'} > 2);
|
|---|
| 639 | }
|
|---|
| 640 | }
|
|---|
| 641 | }
|
|---|
| 642 | next;
|
|---|
| 643 | }
|
|---|
| 644 | }
|
|---|
| 645 | }
|
|---|
| 646 |
|
|---|
| 647 |
|
|---|
| 648 | # evaluate any "../" to next directory up
|
|---|
| 649 | # evaluate any "./" as here
|
|---|
| 650 | sub eval_dir_dots {
|
|---|
| 651 | my $self = shift (@_);
|
|---|
| 652 | my ($filename) = @_;
|
|---|
| 653 |
|
|---|
| 654 | my $dirsep_os = &util::get_os_dirsep();
|
|---|
| 655 | my @dirsep = split(/$dirsep_os/,$filename);
|
|---|
| 656 |
|
|---|
| 657 | my @eval_dirs = ();
|
|---|
| 658 | foreach my $d (@dirsep) {
|
|---|
| 659 | if ($d eq "..") {
|
|---|
| 660 | pop(@eval_dirs);
|
|---|
| 661 |
|
|---|
| 662 | } elsif ($d eq ".") {
|
|---|
| 663 | # do nothing!
|
|---|
| 664 |
|
|---|
| 665 | } else {
|
|---|
| 666 | push(@eval_dirs,$d);
|
|---|
| 667 | }
|
|---|
| 668 | }
|
|---|
| 669 |
|
|---|
| 670 | return &util::filename_cat(@eval_dirs);
|
|---|
| 671 | }
|
|---|
| 672 |
|
|---|
| 673 | sub replace_usemap_links {
|
|---|
| 674 | my $self = shift (@_);
|
|---|
| 675 | my ($front, $link, $back) = @_;
|
|---|
| 676 |
|
|---|
| 677 | $link =~ s/^\.\///;
|
|---|
| 678 | return $front . $link . $back;
|
|---|
| 679 | }
|
|---|
| 680 |
|
|---|
| 681 | sub inc_filecount {
|
|---|
| 682 | my $self = shift (@_);
|
|---|
| 683 |
|
|---|
| 684 | if ($self->{'file_num'} == 1000) {
|
|---|
| 685 | $self->{'dir_num'} ++;
|
|---|
| 686 | $self->{'file_num'} = 0;
|
|---|
| 687 | } else {
|
|---|
| 688 | $self->{'file_num'} ++;
|
|---|
| 689 | }
|
|---|
| 690 | }
|
|---|
| 691 |
|
|---|
| 692 |
|
|---|
| 693 | # Extend the BasPlug read_file so that strings like é are
|
|---|
| 694 | # converted to UTF8 internally.
|
|---|
| 695 | #
|
|---|
| 696 | # We don't convert < or > or & or " in case
|
|---|
| 697 | # they interfere with the GML files
|
|---|
| 698 |
|
|---|
| 699 | sub read_file {
|
|---|
| 700 | my ($self, $filename, $encoding, $language, $textref) = @_;
|
|---|
| 701 |
|
|---|
| 702 | &BasPlug::read_file($self, $filename, $encoding, $language, $textref);
|
|---|
| 703 |
|
|---|
| 704 | # Convert entities to their UTF8 equivalents
|
|---|
| 705 | $$textref =~ s/&(lt|gt|amp|quot|nbsp);/&z$1;/go;
|
|---|
| 706 | $$textref =~ s/&([^;]+);/&ghtml::getcharequiv($1,1)/gseo;
|
|---|
| 707 | $$textref =~ s/&z(lt|gt|amp|quot|nbsp);/&$1;/go;
|
|---|
| 708 | }
|
|---|
| 709 |
|
|---|
| 710 | 1;
|
|---|
