| 1 | ###########################################################################
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| 2 | #
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| 3 | # ConvertToPlug.pm -- plugin that inherits from BasPlug
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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 | # This plugin is inherited by such plugins as WordPlug, PPTPlug, PSPlug, RTFPlug
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| 28 | # and PDFPlug. It facilitates the conversion of these document types to either
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| 29 | # HTML, Text or auto (allow user to choose which format to convert to).
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| 30 | # It works by dynamically inheriting BasPlug and base on the plugin type in
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| 31 | # secondary_plugins to devide which format to 'convert_to'. If the argument is
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| 32 | # not present, the default is to inherit auto.
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| 33 | package ConvertToPlug;
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| 34 |
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| 35 | use BasPlug;
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| 36 | use ghtml;
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| 37 | use HTMLPlug;
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| 38 | use TEXTPlug;
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| 39 | use PagedImgPlug;
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| 40 |
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| 41 | #use strict;
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| 42 | #no strict 'refs'; # allow filehandles to be variables and viceversa
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| 43 |
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| 44 | sub BEGIN {
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| 45 | @ConvertToPlug::ISA = ('BasPlug');
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| 46 | }
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| 47 |
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| 48 | my $convert_to_list =
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| 49 | [ { 'name' => "auto",
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| 50 | 'desc' => "{ConvertToPlug.convert_to.auto}" },
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| 51 | { 'name' => "html",
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| 52 | 'desc' => "{ConvertToPlug.convert_to.html}" },
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| 53 | { 'name' => "text",
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| 54 | 'desc' => "{ConvertToPlug.convert_to.text}" },
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| 55 | { 'name' => "pagedimg_jpg",
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| 56 | 'desc' => "{ConvertToPlug.convert_to.pagedimg_jpg}"},
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| 57 | { 'name' => "pagedimg_gif",
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| 58 | 'desc' => "{ConvertToPlug.convert_to.pagedimg_gif}"},
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| 59 | { 'name' => "pagedimg_png",
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| 60 | 'desc' => "{ConvertToPlug.convert_to.pagedimg_png}"},
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| 61 | ];
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| 62 |
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| 63 | my $arguments =
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| 64 | [ { 'name' => "convert_to",
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| 65 | 'desc' => "{ConvertToPlug.convert_to}",
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| 66 | 'type' => "enum",
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| 67 | 'reqd' => "yes",
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| 68 | 'list' => $convert_to_list,
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| 69 | 'deft' => "html" },
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| 70 | { 'name' => "title_sub",
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| 71 | 'desc' => "{HTMLPlug.title_sub}",
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| 72 | 'type' => "string",
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| 73 | #'type' => "regexp",
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| 74 | 'deft' => "" },
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| 75 | { 'name' => "use_strings",
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| 76 | 'desc' => "{ConvertToPlug.use_strings}",
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| 77 | 'type' => "flag",
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| 78 | 'reqd' => "no" },
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| 79 | { 'name' => "extract_keyphrases",
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| 80 | 'desc' => "{BasPlug.extract_keyphrases}",
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| 81 | 'type' => "flag",
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| 82 | 'reqd' => "no",
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| 83 | 'hiddengli' => "yes" },
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| 84 | { 'name' => "extract_keyphrase_options",
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| 85 | 'desc' => "{BasPlug.extract_keyphrase_options}",
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| 86 | 'type' => "string",
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| 87 | 'reqd' => "no",
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| 88 | 'hiddengli' => "yes" } ];
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| 89 |
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| 90 | my $options = { 'name' => "ConvertToPlug",
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| 91 | 'desc' => "{ConvertToPlug.desc}",
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| 92 | 'abstract' => "yes",
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| 93 | 'inherits' => "yes",
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| 94 | 'args' => $arguments };
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| 95 |
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| 96 | sub findType
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| 97 | {
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| 98 | my ($inputargs) = @_;
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| 99 |
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| 100 | for(my $intCounter = 0; $intCounter < scalar(@{$inputargs}) ; $intCounter++)
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| 101 | {
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| 102 | if($inputargs->[$intCounter] eq "-convert_to")
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| 103 | {
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| 104 | #if($inputargs->[$intCounter+1] eq "auto" || $inputargs->[$intCounter+1] =~ /pagedimg.*/i || $inputargs->[$intCounter+1] eq "text" || $inputargs->[$intCounter+1] eq "html")
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| 105 | # if the setting is "auto" then refer to html for now
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| 106 | if($inputargs->[$intCounter+1] =~ /pagedimg.*/i || $inputargs->[$intCounter+1] eq "text" || $inputargs->[$intCounter+1] eq "html")
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| 107 | {
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| 108 | return $inputargs->[$intCounter+1];
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| 109 | }
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| 110 | else {return "html";}
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| 111 | }
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| 112 | }
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| 113 | return "html";
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| 114 | }
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| 115 |
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| 116 | sub load_secondary_plugins
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| 117 | {
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| 118 | my $self = shift (@_);
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| 119 | my ($class,$plugin_options) = @_;
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| 120 |
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| 121 | my @convert_to_list = split(",",$self->{'convert_to'});
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| 122 | $secondary_plugins = {};
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| 123 |
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| 124 | foreach my $convert_to (@convert_to_list) {
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| 125 | # load in "convert_to" plugin package
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| 126 | my $plugin_class = $convert_to."Plug";
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| 127 | my $plugin_package = $plugin_class.".pm";
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| 128 |
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| 129 | require $plugin_package;
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| 130 |
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| 131 | # call its constructor with extra options that we've worked out!
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| 132 | my $arglist = $plugin_options->{$plugin_class};
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| 133 | my $secondary_plugin = new $plugin_class([], \@$arglist);
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| 134 | $secondary_plugins->{$plugin_class} = $secondary_plugin;
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| 135 | }
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| 136 | $self->{'secondary_plugins'} = $secondary_plugins;
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| 137 | }
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| 138 |
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| 139 | sub new {
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| 140 | my ($class) = shift (@_);
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| 141 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 142 | push(@$pluginlist, $class);
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| 143 | my $classPluginName = (defined $pluginlist->[0]) ? $pluginlist->[0] : $class;
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| 144 | my $strConvertTo = findType($inputargs);
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| 145 |
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| 146 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 147 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 148 |
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| 149 | if ($classPluginName eq "PDFPlug" && $strConvertTo eq "text" &&
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| 150 | $ENV{'GSDLOS'} =~ /^windows$/i) {
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| 151 | print STDERR "Windows does not support pdf to text. PDFs will be converted to HTML instead\n";
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| 152 | $strConvertTo = "html";
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| 153 | }
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| 154 |
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| 155 | my $self = {};
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| 156 |
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| 157 | my $plugin_class ="";
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| 158 |
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| 159 | if ($strConvertTo =~ /pagedimg.*/i){
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| 160 | $plugin_class = "PagedImg"."Plug";
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| 161 | } else {
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| 162 | $plugin_class = uc($strConvertTo)."Plug";
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| 163 | }
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| 164 |
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| 165 | my $plugin_package = $plugin_class.".pm";
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| 166 | require $plugin_package;
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| 167 |
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| 168 | # call its constructor with extra options that we've worked out!
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| 169 | my $arglist = $plugin_options->{$plugin_class};
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| 170 | $self = (defined $hashArgOptLists)? new $plugin_class($pluginlist,$inputargs,$hashArgOptLists): new $plugin_class($pluginlist,$inputargs);
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| 171 |
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| 172 |
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| 173 | if ($strConvertTo eq "text")
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| 174 | {
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| 175 | #$self = (defined $hashArgOptLists)? new TEXTPlug($pluginlist,$inputargs,$hashArgOptLists): new TEXTPlug($pluginlist,$inputargs);
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| 176 | $self->{'convert_to'} = "TEXT";
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| 177 | $self->{'convert_to_ext'} = "txt";
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| 178 | my $text_options = [];
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| 179 | push(@$text_options,"-metadata_fields","Title,GENERATOR");
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| 180 | $secondary_plugin_options->{'TextPlug'} = $text_options;
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| 181 | }
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| 182 | elsif ($strConvertTo =~ /pagedimg.*/i){
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| 183 | #$self = (defined $hashArgOptLists)? new PagedImgPlug($pluginlist,$inputargs,$hashArgOptLists): new PagedImgPlug($pluginlist,$inputargs);
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| 184 | $self->{'convert_to'} = "PagedImg";
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| 185 | my $convert_to_ext = $strConvertTo;
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| 186 | $convert_to_ext =~ s/.*\_(.*)/$1/i;
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| 187 | if ($convert_to_ext eq "gif"){
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| 188 | $self->{'convert_to_ext'} = "gif";
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| 189 | } elsif ($convert_to_ext eq "jpg"){
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| 190 | $self->{'convert_to_ext'} = "jpg";
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| 191 | } elsif ($convert_to_ext eq "png") {
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| 192 | $self->{'convert_to_ext'} = "png";
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| 193 | }
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| 194 | my $pagedimg_options = [];
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| 195 | push(@$pagedimg_options,"-metadata_fields","Title,GENERATOR");
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| 196 | $secondary_plugin_options->{'PagedImgPlug'} = $pagedimg_options;
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| 197 | } else {
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| 198 | # HTML or auto
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| 199 | #$self = (defined $hashArgOptLists)? new HTMLPlug($pluginlist,$inputargs,$hashArgOptLists): new HTMLPlug($pluginlist,$inputargs);
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| 200 | $self->{'convert_to'} = "HTML";
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| 201 | $self->{'convert_to_ext'} = "html";
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| 202 | my $html_options = [];
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| 203 | push(@$html_options,"-rename_assoc_files","1");
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| 204 | push(@$html_options,"-metadata_fields","Title,GENERATOR");
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| 205 | $secondary_plugin_options->{'HTMLPlug'} = $html_options;
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| 206 | }
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| 207 |
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| 208 | return bless $self, $class;
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| 209 | }
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| 210 |
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| 211 |
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| 212 | sub init {
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| 213 | my $self = shift (@_);
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| 214 | my ($verbosity, $outhandle, $failhandle) = @_;
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| 215 |
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| 216 | $self->SUPER::init($verbosity,$outhandle,$failhandle);
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| 217 |
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| 218 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 219 |
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| 220 | foreach my $plug_name (keys %$secondary_plugins) {
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| 221 | my $plugin = $secondary_plugins->{$plug_name};
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| 222 | $plugin->init($verbosity,$outhandle,$failhandle);
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| 223 | }
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| 224 | }
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| 225 |
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| 226 | sub deinit {
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| 227 | # called only once, after all plugin passes have been done
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| 228 |
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| 229 | my ($self) = @_;
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| 230 |
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| 231 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 232 |
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| 233 | foreach my $plug_name (keys %$secondary_plugins) {
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| 234 | my $plugin = $secondary_plugins->{$plug_name};
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| 235 | $plugin->deinit();
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| 236 | }
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| 237 | }
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| 238 |
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| 239 | sub convert_post_process
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| 240 | {
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| 241 | # by default do no post processing
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| 242 | return;
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| 243 | }
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| 244 |
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| 245 |
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| 246 | # Run conversion utility on the input file.
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| 247 | #
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| 248 | # The conversion takes place in a collection specific 'tmp' directory so
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| 249 | # that we don't accidentally damage the input.
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| 250 | #
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| 251 | # The desired output type is indicated by $output_ext. This is usually
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| 252 | # something like "html" or "word", but can be "best" (or the empty string)
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| 253 | # to indicate that the conversion utility should do the best it can.
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| 254 |
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| 255 | sub tmp_area_convert_file {
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| 256 | my $self = shift (@_);
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| 257 | my ($output_ext, $input_filename, $textref) = @_;
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| 258 |
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| 259 | my $outhandle = $self->{'outhandle'};
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| 260 | my $convert_to = $self->{'convert_to'};
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| 261 | my $failhandle = $self->{'failhandle'};
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| 262 | my $convert_to_ext = $self->{'convert_to_ext'};
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| 263 |
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| 264 | # softlink to collection tmp dir
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| 265 | my $tmp_dirname
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| 266 | = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "tmp");
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| 267 | &util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
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| 268 |
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| 269 | # derive tmp filename from input filename
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| 270 | my ($tailname, $dirname, $suffix)
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| 271 | = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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| 272 |
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| 273 | # Remove any white space from filename -- no risk of name collision, and
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| 274 | # makes later conversion by utils simpler. Leave spaces in path...
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| 275 | $tailname =~ s/\s+//g;
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| 276 |
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| 277 | my $tmp_filename = &util::filename_cat($tmp_dirname, "$tailname$suffix");
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| 278 |
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| 279 | &util::soft_link($input_filename, $tmp_filename);
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| 280 |
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| 281 | my $verbosity = $self->{'verbosity'};
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| 282 | if ($verbosity > 0) {
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| 283 | print $outhandle "Converting $tailname$suffix to $convert_to format\n";
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| 284 | }
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| 285 |
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| 286 | my $errlog = &util::filename_cat($tmp_dirname, "err.log");
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| 287 |
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| 288 | # Execute the conversion command and get the type of the result,
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| 289 | # making sure the converter gives us the appropriate output type
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| 290 | my $output_type="";
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| 291 | if ($convert_to =~ m/PagedImg/i) {
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| 292 | $output_type = lc($convert_to)."_".lc($convert_to_ext);
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| 293 | } else {
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| 294 | $output_type = lc($convert_to);
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| 295 | }
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| 296 |
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| 297 | my $cmd = "perl -S gsConvert.pl -verbose $verbosity ";
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| 298 | if (defined $self->{'convert_options'}) {
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| 299 | $cmd .= $self->{'convert_options'} . " ";
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| 300 | }
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| 301 | if ($self->{'use_strings'}) {
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| 302 | $cmd .= "-use_strings ";
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| 303 | }
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| 304 | $cmd .= "-errlog \"$errlog\" -output $output_type \"$tmp_filename\"";
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| 305 |
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| 306 | $output_type = `$cmd`;
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| 307 |
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| 308 | # remove symbolic link to original file
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| 309 | &util::rm($tmp_filename);
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| 310 |
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| 311 | # Check STDERR here
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| 312 | chomp $output_type;
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| 313 | if ($output_type eq "fail") {
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| 314 | print $outhandle "Could not convert $tailname$suffix to $convert_to format\n";
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| 315 | print $failhandle "$tailname$suffix: " . ref($self) . " failed to convert to $convert_to\n";
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| 316 | $self->{'num_not_processed'} ++;
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| 317 | if (-s "$errlog") {
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| 318 | open(ERRLOG, "$errlog");
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| 319 | while (<ERRLOG>) {
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| 320 | print $outhandle "$_";
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| 321 | }
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| 322 | print $outhandle "\n";
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| 323 | close ERRLOG;
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| 324 | }
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| 325 | &util::rm("$errlog") if (-e "$errlog");
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| 326 | return "";
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| 327 | }
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| 328 |
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| 329 | # store the *actual* output type and return the output filename
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| 330 | # it's possible we requested conversion to html, but only to text succeeded
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| 331 | #$self->{'convert_to_ext'} = $output_type;
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| 332 | if ($output_type =~ /html/i) {
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| 333 | $self->{'converted_to'} = "HTML";
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| 334 | } elsif ($output_type =~ /te?xt/i) {
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| 335 | $self->{'converted_to'} = "TEXT";
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| 336 | } elsif ($output_type =~ /item/i){
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| 337 | $self->{'converted_to'} = "PagedImg";
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| 338 | }
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| 339 |
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| 340 | my $output_filename = $tmp_filename;
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| 341 | if ($output_type =~ /item/i) {
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| 342 | # running under windows
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| 343 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
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| 344 | $output_filename = $tmp_dirname . "\\$tailname\\" . $tailname . ".$output_type";
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| 345 | } else {
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| 346 | $output_filename = $tmp_dirname . "\/$tailname\/" . $tailname . ".$output_type";
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| 347 | }
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| 348 | } else {
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| 349 | $output_filename =~ s/$suffix$/.$output_type/;
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| 350 | }
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| 351 | return $output_filename;
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| 352 | }
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| 353 |
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| 354 |
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| 355 | # Remove collection specific tmp directory and all its contents.
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| 356 | sub cleanup_tmp_area {
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| 357 | my $self = shift (@_);
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| 358 |
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| 359 | my $tmp_dirname
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| 360 | = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "tmp");
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| 361 | &util::rm_r($tmp_dirname);
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| 362 | &util::mk_dir($tmp_dirname);
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| 363 | }
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| 364 |
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| 365 | # Override BasPlug read
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| 366 | # We don't want to get language encoding stuff until after we've converted
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| 367 | # our file to either TEXT or HTML or PagedImage.
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| 368 | sub read {
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| 369 | my $self = shift (@_);
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| 370 | my ($pluginfo, $base_dir, $file, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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| 371 | #if ($self->is_recursive()) {
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| 372 | # die "BasPlug::read function must be implemented in sub-class for recursive plugins\n";
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| 373 | # }
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| 374 |
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| 375 | my $outhandle = $self->{'outhandle'};
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| 376 |
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| 377 | my ($block_status,$filename) = $self->read_block(@_);
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| 378 | return $block_status if ((!defined $block_status) || ($block_status==0));
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| 379 | $file = $self->read_tidy_file($file);
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| 380 |
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| 381 | my $output_ext = $self->{'convert_to_ext'};
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| 382 |
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| 383 | my $conv_filename = "";
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| 384 | $conv_filename = $self->tmp_area_convert_file($output_ext, $filename);
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| 385 |
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| 386 | if ("$conv_filename" eq "") {return 0;} # allows continue on errors
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| 387 | if (! -e "$conv_filename") {return 0;} # allows continue on errors
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| 388 | $self->{'conv_filename'} = $conv_filename;
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| 389 |
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| 390 | $self->convert_post_process($conv_filename);
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| 391 |
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| 392 | my $secondary_plugins = $self->{'secondary_plugins'};
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| 393 | my $num_secondary_plugins = scalar(keys %$secondary_plugins);
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| 394 |
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| 395 | if ($num_secondary_plugins == 0) {
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| 396 | print $outhandle "Warning: No secondary plugin to use in conversion. Skipping $file\n";
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| 397 | return 0; # effectively block it
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| 398 | }
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| 399 |
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| 400 | my @plugin_names = keys %$secondary_plugins;
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| 401 | my $plugin_name = shift @plugin_names;
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| 402 |
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| 403 | if ($num_secondary_plugins > 1) {
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| 404 | print $outhandle "Warning: Multiple secondary plugins not supported yet! Choosing $plugin_name\n.";
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| 405 | }
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| 406 |
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| 407 | my $secondary_plugin = $secondary_plugins->{$plugin_name};
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| 408 |
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| 409 | # note: metadata is not carried on to the next level
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| 410 | my ($rv,$doc_obj)
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| 411 | = $secondary_plugin->read_into_doc_obj ($pluginfo,"", $conv_filename,
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| 412 | $metadata, $processor, $maxdocs, $total_count,
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| 413 | $gli);
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| 414 |
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| 415 | if ((!defined $rv) || ($rv<1)) {
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| 416 | # wasn't processed
|
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| 417 | return $rv;
|
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| 418 | }
|
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| 419 |
|
|---|
| 420 | # Override previous gsdlsourcefilename set by secondary plugin
|
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| 421 | my $collect_file = &util::filename_within_collection($filename);
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| 422 | my $collect_conv_file = &util::filename_within_collection($conv_filename);
|
|---|
| 423 | $doc_obj->set_source_filename ($collect_file);
|
|---|
| 424 | $doc_obj->set_converted_filename($collect_conv_file);
|
|---|
| 425 |
|
|---|
| 426 | my ($filemeta) = $file =~ /([^\\\/]+)$/;
|
|---|
| 427 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "Source", &ghtml::dmsafe($filemeta));
|
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| 428 |
|
|---|
| 429 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
|
|---|
| 430 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "FileSize", (-s $filename));
|
|---|
| 431 |
|
|---|
| 432 | # do plugin specific processing of doc_obj
|
|---|
| 433 | unless (defined ($self->process(undef, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli))) {
|
|---|
| 434 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
|---|
| 435 | return -1;
|
|---|
| 436 | }
|
|---|
| 437 | # do any automatic metadata extraction
|
|---|
| 438 | $self->auto_extract_metadata ($doc_obj);
|
|---|
| 439 | # add an OID
|
|---|
| 440 | $doc_obj->set_OID();
|
|---|
| 441 | # process the document
|
|---|
| 442 | $processor->process($doc_obj);
|
|---|
| 443 | ##$self->cleanup_tmp_area();
|
|---|
| 444 |
|
|---|
| 445 | $self->{'num_processed'} ++;
|
|---|
| 446 |
|
|---|
| 447 | return 1;
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 |
|
|---|
| 451 | # do plugin specific processing of doc_obj for doc_ext type
|
|---|
| 452 | sub process_type {
|
|---|
| 453 | my $self = shift (@_);
|
|---|
| 454 | my ($doc_ext, $base_dir, $file, $doc_obj) = @_;
|
|---|
| 455 |
|
|---|
| 456 | # associate original file with doc object
|
|---|
| 457 | my $cursection = $doc_obj->get_top_section();
|
|---|
| 458 | my $filename = &util::filename_cat($base_dir, $file);
|
|---|
| 459 | $doc_obj->associate_file($filename, "doc.$doc_ext", undef, $cursection);
|
|---|
| 460 |
|
|---|
| 461 | my $file_type;
|
|---|
| 462 |
|
|---|
| 463 | if ($doc_ext eq "doc") {
|
|---|
| 464 | $file_type = "Word";
|
|---|
| 465 | } elsif ($doc_ext eq "xls") {
|
|---|
| 466 | $file_type = "Excel";
|
|---|
| 467 | } elsif ($doc_ext eq "ppt") {
|
|---|
| 468 | $file_type = "PPT";
|
|---|
| 469 | } elsif ($doc_ext eq "pdf") {
|
|---|
| 470 | $file_type = "PDF";
|
|---|
| 471 | } elsif ($doc_ext eq "rtf") {
|
|---|
| 472 | $file_type = "RTF";
|
|---|
| 473 | } elsif ($doc_ext eq "ps") {
|
|---|
| 474 | $file_type = "PS";
|
|---|
| 475 | }
|
|---|
| 476 |
|
|---|
| 477 | my $file_format = $file_type || "unknown";
|
|---|
| 478 |
|
|---|
| 479 | # We use set instead of add here because we only want one value
|
|---|
| 480 | $doc_obj->set_utf8_metadata_element($cursection, "FileFormat", $file_format);
|
|---|
| 481 |
|
|---|
| 482 | my $doclink = "<a href=\"_httpcollection_/index/assoc/[archivedir]/doc.$doc_ext\">";
|
|---|
| 483 | $doc_obj->add_utf8_metadata ($cursection, "srclink", $doclink);
|
|---|
| 484 | $doc_obj->add_utf8_metadata ($cursection, "srcicon", "_icon".$doc_ext."_");
|
|---|
| 485 | $doc_obj->add_utf8_metadata ($cursection, "/srclink", "</a>");
|
|---|
| 486 |
|
|---|
| 487 | return 1;
|
|---|
| 488 | }
|
|---|
| 489 |
|
|---|
| 490 | 1;
|
|---|
| 491 |
|
|---|
| 492 |
|
|---|
| 493 |
|
|---|
| 494 |
|
|---|
| 495 |
|
|---|
| 496 |
|
|---|
| 497 |
|
|---|
