1 | ###########################################################################
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2 | #
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3 | # UnknownConverterPlugin.pm -- plugin that runs the provided cmdline cmd
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4 | # to launch an custom unknown external conversion application that will
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5 | # convert from some custom unknown format to one of txt, html or xml.
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6 | #
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7 | # A component of the Greenstone digital library software
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8 | # from the New Zealand Digital Library Project at the
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9 | # University of Waikato, New Zealand.
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10 | #
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11 | # Copyright (C) 1999-2005 New Zealand Digital Library Project
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12 | #
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13 | # This program is free software; you can redistribute it and/or modify
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14 | # it under the terms of the GNU General Public License as published by
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15 | # the Free Software Foundation; either version 2 of the License, or
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16 | # (at your option) any later version.
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17 | #
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18 | # This program is distributed in the hope that it will be useful,
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19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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21 | # GNU General Public License for more details.
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22 | #
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23 | # You should have received a copy of the GNU General Public License
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24 | # along with this program; if not, write to the Free Software
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25 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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26 | #
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27 | ###########################################################################
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28 |
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29 | package UnknownConverterPlugin;
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30 |
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31 | use strict;
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32 | no strict 'subs';
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33 | no strict 'refs'; # allow filehandles to be variables and viceversa
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34 |
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35 | use ConvertBinaryFile;
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36 | use UnknownPlugin;
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37 |
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38 | # TO DO:
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39 | # - error messages and other display strings need to go into strings.properties
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40 | # - Have a TEMPDIR placeholder in the command, which, if present, gets replaced with the usual tempdir location
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41 | # of a collection, and in which case we have to clean up intermediate files generated in there at the end?
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42 | # Add a check that the generated file or files generated in the output dir match the convert_to option selected
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43 | # before trying to process them
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44 | # Add option that says where output comes from: stdout of the process, file that gets generated, folder.
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45 | # At present, a file or folder of files is assumed.
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46 | # Need to look in there for files with extension process_ext.
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47 | # Do we also need a html_multi option to convert_to? Support html_multi as output?
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48 | # Then a folder of html files is generated per document?
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49 | # OR Flag that indicates whether an html file + associated folder (such as of images) gets generated. And name of assoc folder. Such output gets generated for instance when a doc file is replaced by its html version.
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50 |
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51 | sub BEGIN {
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52 | @UnknownConverterPlugin::ISA = ('UnknownPlugin', 'ConvertBinaryFile');
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53 | }
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54 |
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55 | my $convert_to_list =
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56 | [ { 'name' => "text",
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57 | 'desc' => "{ConvertBinaryFile.convert_to.text}" },
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58 | { 'name' => "html",
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59 | 'desc' => "{ConvertBinaryFile.convert_to.html}" },
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60 | { 'name' => "pagedimg_jpg",
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61 | 'desc' => "{ConvertBinaryFile.convert_to.pagedimg_jpg}" },
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62 | { 'name' => "pagedimg_gif",
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63 | 'desc' => "{ConvertBinaryFile.convert_to.pagedimg_gif}" },
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64 | { 'name' => "pagedimg_png",
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65 | 'desc' => "{ConvertBinaryFile.convert_to.pagedimg_png}" }
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66 | ];
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67 |
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68 | my $arguments =
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69 | [ { 'name' => "exec_cmd",
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70 | 'desc' => "{UnknownConverterPlugin.exec_cmd}",
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71 | 'type' => "string",
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72 | 'deft' => "",
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73 | 'reqd' => "yes" },
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74 | { 'name' => "convert_to",
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75 | 'desc' => "{ConvertBinaryFile.convert_to}",
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76 | 'type' => "enum",
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77 | 'reqd' => "yes",
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78 | 'list' => $convert_to_list,
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79 | 'deft' => "text" } ];
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80 |
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81 | my $options = { 'name' => "UnknownConverterPlugin",
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82 | 'desc' => "{UnknownConverterPlugin.desc}",
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83 | 'abstract' => "no",
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84 | 'inherits' => "yes",
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85 | 'args' => $arguments };
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86 |
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87 |
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88 | sub new {
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89 | my ($class) = shift (@_);
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90 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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91 | push(@$pluginlist, $class);
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92 |
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93 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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94 | push(@{$hashArgOptLists->{"OptList"}},$options);
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95 |
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96 | my $unknown_converter_self = new UnknownPlugin($pluginlist, $inputargs, $hashArgOptLists);
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97 | my $cbf_self = new ConvertBinaryFile($pluginlist, $inputargs, $hashArgOptLists);
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98 |
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99 | # Need to feed the superclass plugins to merge_inheritance() below in the order that the
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100 | # superclass plugins were declared in the ISA listing earlier in this file:
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101 | my $self = BaseImporter::merge_inheritance($unknown_converter_self, $cbf_self);
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102 |
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103 | $self = bless $self, $class;
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104 |
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105 | my $outhandle = $self->{'outhandle'};
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106 | print STDERR "\n\n**** convert_to is |" . $self->{'convert_to'} . "|\n\n";
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107 | if(!defined $self->{'convert_to'}) {
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108 | $self->{'convert_to'} = "text"; # why do I have to set a value for convert_to here, when a default's already set at the start of this file???????
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109 | }
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110 |
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111 | # Convert_To set up, including secondary_plugins for processing the text or html generated
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112 | # set convert_to_plugin and convert_to_ext
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113 | $self->set_standard_convert_settings();
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114 |
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115 | my $secondary_plugin_name = $self->{'convert_to_plugin'};
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116 | my $secondary_plugin_options = $self->{'secondary_plugin_options'};
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117 |
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118 | if (!defined $secondary_plugin_options->{$secondary_plugin_name}) {
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119 | $secondary_plugin_options->{$secondary_plugin_name} = [];
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120 | }
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121 | my $specific_options = $secondary_plugin_options->{$secondary_plugin_name};
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122 |
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123 | # using defaults for secondary plugins, taken from RTFPlugin
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124 | push(@$specific_options, "-file_rename_method", "none");
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125 | push(@$specific_options, "-extract_language") if $self->{'extract_language'};
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126 | if ($secondary_plugin_name eq "TextPlugin") {
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127 | push(@$specific_options, "-input_encoding", "utf8");
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128 | }
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129 | elsif ($secondary_plugin_name eq "HTMLPlugin") {
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130 | push(@$specific_options, "-description_tags") if $self->{'description_tags'};
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131 | push(@$specific_options, "-processing_tmp_files");
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132 | }
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133 | elsif ($secondary_plugin_name eq "PagedImagePlugin") {
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134 | push(@$specific_options, "-screenviewsize", "1000");
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135 | push(@$specific_options, "-enable_cache");
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136 | push(@$specific_options, "-processing_tmp_files");
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137 | }
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138 |
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139 | # bless again, copied from PDFPlugin, PowerPointPlugin
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140 | $self = bless $self, $class;
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141 | $self->load_secondary_plugins($class,$secondary_plugin_options,$hashArgOptLists);
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142 | return $self;
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143 | }
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144 |
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145 | # Called by UnknownPlugin::process()
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146 | # Overriding here to ensure that the NoText flag (metadata) and dummy text are not set,
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147 | # since, unlike UnknownPlugin, this plugin has a chance of extracting text from the unknown file format
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148 | sub add_dummy_text {
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149 | my $self = shift(@_);
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150 | }
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151 |
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152 | # Are init, begin and deinit necessary (will they not get called automatically)?
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153 | # Copied here from PDFPlugin, PowerPointPlugin
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154 | # https://stackoverflow.com/questions/42885207/why-doesnt-class-supernew-call-the-constructors-of-all-parent-classes-when
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155 | # "$class->SUPER::new always calls A::new because A comes before B in @ISA. See method resolution order in perlobj: ..."
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156 | # https://stackoverflow.com/questions/15414696/when-using-multiple-inheritance-in-perl-is-there-a-way-to-indicate-which-super-f
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157 | sub init {
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158 | my $self = shift (@_);
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159 |
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160 | # ConvertBinaryFile init
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161 | $self->ConvertBinaryFile::init(@_);
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162 | }
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163 |
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164 | sub begin {
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165 | my $self = shift (@_);
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166 |
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167 | $self->ConvertBinaryFile::begin(@_);
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168 |
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169 | }
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170 |
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171 | sub deinit {
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172 | my $self = shift (@_);
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173 |
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174 | $self->ConvertBinaryFile::deinit(@_);
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175 |
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176 | }
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177 |
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178 | # overridden to run the custom conversion command here in place of gsConvert.pl called by ConvertBinaryFile.pm
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179 | sub tmp_area_convert_file {
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180 | # should we first hardlink the output files/folder to tmp area, so we won't be working across drives?
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181 |
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182 | my $self = shift (@_);
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183 | my ($output_ext, $input_filename, $textref) = @_;
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184 |
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185 | my $plugin_name = $self->{'plugin_type'}; # inherited from BaseImporter
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186 |
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187 | #### COPIED FROM ConvertBinaryFile::tmp_area_convert_file()
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188 | my $outhandle = $self->{'outhandle'};
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189 | my $convert_to = $self->{'convert_to'};
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190 | my $failhandle = $self->{'failhandle'};
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191 | my $convert_to_ext = $self->{'convert_to_ext'}; #set by ConvertBinaryFile::set_standard_convert_settings()
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192 |
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193 |
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194 | my $upgraded_input_filename = &util::upgrade_if_dos_filename($input_filename);
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195 |
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196 | # derive tmp filename from input filename
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197 | my ($tailname, $dirname, $suffix)
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198 | = &File::Basename::fileparse($upgraded_input_filename, "\\.[^\\.]+\$");
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199 |
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200 | # softlink to collection tmp dir
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201 | my $tmp_dirname = &util::get_timestamped_tmp_folder();
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202 | if (defined $tmp_dirname) {
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203 | $self->{'tmp_dir'} = $tmp_dirname;
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204 | } else {
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205 | $tmp_dirname = $dirname;
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206 | }
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207 |
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208 | # # convert to utf-8 otherwise we have problems with the doc.xml file later on
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209 | # my $utf8_tailname = (&unicode::check_is_utf8($tailname)) ? $tailname : $self->filepath_to_utf8($tailname);
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210 |
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211 | # make sure filename to be used can be stored OK in a UTF-8 compliant doc.xml file
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212 | my $utf8_tailname = &unicode::raw_filename_to_utf8_url_encoded($tailname);
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213 |
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214 |
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215 | # URLEncode this since htmls with images where the html filename is utf8 don't seem
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216 | # to work on Windows (IE or Firefox), as browsers are looking for filesystem-encoded
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217 | # files on the filesystem.
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218 | $utf8_tailname = &util::rename_file($utf8_tailname, $self->{'file_rename_method'}, "without_suffix");
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219 |
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220 | my $lc_suffix = lc($suffix);
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221 | my $tmp_filename = &FileUtils::filenameConcatenate($tmp_dirname, "$utf8_tailname$lc_suffix");
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222 |
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223 | # If gsdl is remote, we're given relative path to input file, of the form import/utf8_tailname.suffix
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224 | # But we can't softlink to relative paths. Therefore, we need to ensure that
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225 | # the input_filename is the absolute path, see http://perldoc.perl.org/File/Spec.html
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226 | my $ensure_path_absolute = 1; # true
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227 | &FileUtils::softLink($input_filename, $tmp_filename, $ensure_path_absolute);
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228 | my $verbosity = $self->{'verbosity'};
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229 | if ($verbosity > 0) {
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230 | print $outhandle "Converting $tailname$suffix to $convert_to format with extension $convert_to_ext\n";
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231 | }
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232 |
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233 | my $errlog = &FileUtils::filenameConcatenate($tmp_dirname, "err.log");
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234 |
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235 |
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236 | my $output_type=$self->{'convert_to'};
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237 |
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238 | # store the *actual* output type and return the output filename
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239 | # it's possible we requested conversion to html, but only to text succeeded
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240 | #$self->{'convert_to_ext'} = $output_type;
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241 | if ($output_type =~ /html/i) {
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242 | $self->{'converted_to'} = "HTML";
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243 | } elsif ($output_type =~ /te?xt/i) {
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244 | $self->{'converted_to'} = "Text";
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245 | } elsif ($output_type =~ /item/i || $output_type =~ /^pagedimg/){
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246 | $self->{'converted_to'} = "PagedImage";
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247 | }
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248 |
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249 | my $output_filename = $tmp_filename;
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250 | my $output_dirname;
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251 | if ($output_type =~ /item/i || $output_type =~ /^pagedimg/) {
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252 | # running under windows
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253 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
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254 | $output_dirname = $tmp_dirname . "\\$utf8_tailname\\" . $utf8_tailname;
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255 | } else {
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256 | $output_dirname = $tmp_dirname . "\/$utf8_tailname\/" . $utf8_tailname;
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257 | }
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258 | $output_filename .= ".item";
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259 | } else {
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260 | $output_filename =~ s/$lc_suffix$/.$output_type/;
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261 | }
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262 |
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263 | #### END COPIED FROM ConvertBinaryFile::tmp_area_convert_file()
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264 |
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265 | # Execute the conversion command and get the type of the result,
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266 | # making sure the converter gives us the appropriate output type
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267 |
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268 | # On Linux: if the program isn't installed, $? tends to come back with 127, in any case neither 0 nor 1.
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269 | # On Windows: echo %ERRORLEVEL% ends up as 9009 if the program is not installed.
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270 | # If running the command returns 0, let's assume success and so the act of running the command
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271 | # should produce either a text file or output to stdout.
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272 |
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273 | my $cmd = $self->{'exec_cmd'};
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274 | if(!$cmd) { # empty string for instance
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275 | print $outhandle "$plugin_name Conversion error: a command to execute is required, cmd provided is |$cmd|\n";
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276 | return "";
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277 | }
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278 |
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279 | # HARDCODING CMD FOR NOW
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280 | #$cmd ="/Scratch/ak19/gs3-svn-15Nov2016/packages/jre/bin/java -cp \"/Scratch/ak19/gs3-svn-15Nov2016/gs2build/ext/pdf-box/lib/java/pdfbox-app.jar\" -Dline.separator=\"<br />\" org.apache.pdfbox.ExtractText -html \"/Scratch/ak19/tutorial_sample_files/pdfbox/A9-access-best-practices.pdf\" \"/Scratch/ak19/gs3-svn-15Nov2016/pdf-tmp/1.html\"";
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281 |
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282 | #$cmd ="/Scratch/ak19/gs3-svn-15Nov2016/packages/jre/bin/java -cp \"/Scratch/ak19/gs3-svn-15Nov2016/gs2build/ext/pdf-box/lib/java/pdfbox-app.jar\" -Dline.separator=\"<br />\" org.apache.pdfbox.ExtractText -html INPUT_FILE OUTPUT";
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283 |
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284 | # replace occurrences of placeholders in cmd string
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285 | #$cmd =~ s@\"@\\"@g;
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286 | $cmd =~ s@INPUT_FILE@\"$input_filename\"@g;
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287 | if(defined $output_dirname) {
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288 | $cmd =~ s@OUTPUT@\"$output_dirname\"@g;
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289 | } else {
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290 | $cmd =~ s@OUTPUT@\"$output_filename\"@g;
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291 | }
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292 |
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293 | # Some debugging
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294 | if ($self->{'verbosity'} > 2) {
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295 | print STDERR "$plugin_name: executing conversion cmd \n|$cmd|\n";
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296 | print STDERR " on infile |$input_filename|\n";
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297 | print STDERR " to produce expected $output_filename\n";
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298 | }
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299 |
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300 | # Run the command at last
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301 | my $status = system($cmd);
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302 |
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303 | if($status == 127 || $status == 9009) { # means the cmd isn't recognised on Unix and Windows, respectively
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304 | print $outhandle "$plugin_name Conversion error: cmd unrecognised, may not be installed (got $status when running $cmd)\n";
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305 | return "";
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306 | }
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307 |
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308 | if($status != 0) {
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309 | print $outhandle "$plugin_name Conversion error: conversion failed with exit value $status\n";
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310 | return "";
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311 | }
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312 |
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313 | # remove symbolic link to original file
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314 | &FileUtils::removeFiles($tmp_filename);
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315 |
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316 |
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317 | if(defined $output_dirname && -d $output_dirname) {
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318 | print $outhandle "$plugin_name Conversion error: Output directory $output_dirname doesn't exist\n";
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319 | return "";
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320 | }
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321 | elsif (!-e $output_filename) {
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322 | print $outhandle "$plugin_name Conversion error: Output file $output_filename doesn't exist\n";
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323 | return "";
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324 | }
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325 |
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326 | # else, conversion success
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327 |
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328 | # if multiple images were generated by running the conversion
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329 | if ($self->{'convert_to'} =~ /^pagedimg/) {
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330 | my $item_filename = $self->generate_item_file($output_filename);
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331 |
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332 | if (!-e $item_filename) {
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333 | print $outhandle "$plugin_name Conversion error: Item file $item_filename was not generated\n";
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334 | return "";
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335 | }
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336 | $output_filename = $item_filename;
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337 | }
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338 |
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339 | $self->{'output_dirname'} = $output_dirname;
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340 | $self->{'output_filename'} = $output_filename;
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341 |
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342 | return $output_filename;
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343 | }
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344 |
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345 | # Copied from PowerPointPlugin, with some modifications
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346 | # override default read in some situations, as the conversion of ppt to html results in many files, and we want them all to be processed.
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347 | sub read {
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348 | my $self = shift (@_);
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349 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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350 |
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351 | # can we process this file??
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352 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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353 |
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354 | return undef unless $self->can_process_this_file($filename_full_path);
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355 |
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356 | my $is_output_dir = (defined $self->{'output_dirname'}) ? 1 : 0;
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357 |
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358 | # we are only doing something special if we have a directory of html files
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359 | #if ($is_output_dir || $self->{'convert_to'} ne "html") {
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360 | if ($self->{'convert_to'} ne "html_multi") {
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361 | return $self->BaseImporter::read(@_); # no read in ConvertBinaryFile.pm
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362 | }
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363 | my $outhandle = $self->{'outhandle'};
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364 | print STDERR "<Processing n='$file' p='$self->{'plugin_type'}'>\n" if ($gli);
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365 | print $outhandle "$self->{'plugin_type'} processing $file\n"
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366 | if $self->{'verbosity'} > 1;
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367 |
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368 | my $conv_filename = $self->tmp_area_convert_file("html", $filename_full_path); # uses our overridden version
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369 | if ("$conv_filename" eq "") {return -1;} # had an error, will be passed down pipeline
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370 | if (! -e "$conv_filename") {return -1;}
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371 |
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372 | my ($tailname, $html_dirname, $suffix)
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373 | = &File::Basename::fileparse($conv_filename, "\\.[^\\.]+\$");
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374 |
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375 | my $collect_file = &util::filename_within_collection($filename_full_path);
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376 | my $dirname_within_collection = &util::filename_within_collection($html_dirname);
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377 | my $secondary_plugin = $self->{'secondary_plugins'}->{"HTMLPlugin"};
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378 |
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379 | my @dir;
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380 | if (!opendir (DIR, $html_dirname)) {
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381 | print $outhandle "PowerPointPlugin: Couldn't read directory $html_dirname\n";
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382 | # just process the original file
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383 | @dir = ("$tailname.$suffix");
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384 |
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385 | } else {
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386 | @dir = readdir (DIR);
|
---|
387 | closedir (DIR);
|
---|
388 | }
|
---|
389 |
|
---|
390 | foreach my $file (@dir) {
|
---|
391 | next unless $file =~ /\.html$/;
|
---|
392 |
|
---|
393 | my ($rv, $doc_obj) =
|
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394 | $secondary_plugin->read_into_doc_obj ($pluginfo,"", &util::filename_cat($html_dirname,$file), $block_hash, {}, $processor, $maxdocs, $total_count, $gli);
|
---|
395 | if ((!defined $rv) || ($rv<1)) {
|
---|
396 | # wasn't processed
|
---|
397 | return $rv;
|
---|
398 | }
|
---|
399 |
|
---|
400 | # next block copied from ConvertBinaryFile
|
---|
401 | # from here ...
|
---|
402 | # Override previous gsdlsourcefilename set by secondary plugin
|
---|
403 |
|
---|
404 | $doc_obj->set_source_filename ($collect_file, $self->{'file_rename_method'});
|
---|
405 | ## set_source_filename does not set the doc_obj source_path which is used in archives dbs for incremental
|
---|
406 | # build. so set it manually.
|
---|
407 | $doc_obj->set_source_path($filename_full_path);
|
---|
408 | $doc_obj->set_converted_filename(&util::filename_cat($dirname_within_collection, $file));
|
---|
409 |
|
---|
410 | my $plugin_filename_encoding = $self->{'filename_encoding'};
|
---|
411 | my $filename_encoding = $self->deduce_filename_encoding($file,$metadata,$plugin_filename_encoding);
|
---|
412 | $self->set_Source_metadata($doc_obj, $filename_full_path,$filename_encoding);
|
---|
413 |
|
---|
414 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "Plugin", "$self->{'plugin_type'}");
|
---|
415 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "FileSize", (-s $filename_full_path));
|
---|
416 |
|
---|
417 |
|
---|
418 | my ($tailname, $dirname, $suffix)
|
---|
419 | = &File::Basename::fileparse($filename_full_path, "\\.[^\\.]+\$");
|
---|
420 | $doc_obj->set_utf8_metadata_element($doc_obj->get_top_section(), "FilenameRoot", $tailname);
|
---|
421 |
|
---|
422 |
|
---|
423 | my $topsection = $doc_obj->get_top_section();
|
---|
424 | $self->add_associated_files($doc_obj, $filename_full_path);
|
---|
425 |
|
---|
426 | # extra_metadata is already called by sec plugin in process??
|
---|
427 | $self->extra_metadata($doc_obj, $topsection, $metadata); # do we need this here??
|
---|
428 | # do any automatic metadata extraction
|
---|
429 | $self->auto_extract_metadata ($doc_obj);
|
---|
430 |
|
---|
431 | # have we found a Title??
|
---|
432 | $self->title_fallback($doc_obj,$topsection,$filename_no_path);
|
---|
433 |
|
---|
434 | # use the one generated by HTMLPlugin, otherwise they all end up with same id.
|
---|
435 | #$self->add_OID($doc_obj);
|
---|
436 | # to here...
|
---|
437 |
|
---|
438 | # process it
|
---|
439 | $processor->process($doc_obj);
|
---|
440 | undef $doc_obj;
|
---|
441 | }
|
---|
442 | $self->{'num_processed'} ++;
|
---|
443 |
|
---|
444 | # deleted some commented out code here that exists in PowerPointPlugin
|
---|
445 |
|
---|
446 | # for UnknownConverterPlugin, don't delete any temp files that the conversion may have created?
|
---|
447 | # as we don't know where it was created. No. Now creating in tmp.
|
---|
448 | $self->clean_up_after_doc_obj_processing();
|
---|
449 |
|
---|
450 |
|
---|
451 | # if process_status == 1, then the file has been processed.
|
---|
452 | return 1;
|
---|
453 |
|
---|
454 | }
|
---|
455 |
|
---|
456 | # use the read_into_doc_obj inherited from ConvertBinaryFile "to call secondary plugin stuff"
|
---|
457 | sub read_into_doc_obj {
|
---|
458 | my $self = shift (@_);
|
---|
459 | $self->ConvertBinaryFile::read_into_doc_obj(@_);
|
---|
460 | }
|
---|
461 |
|
---|
462 | sub process {
|
---|
463 | my $self = shift (@_);
|
---|
464 | $self->UnknownPlugin::process(@_);
|
---|
465 | }
|
---|
466 |
|
---|
467 |
|
---|
468 | 1;
|
---|