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