1 | ###########################################################################
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2 | #
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3 | # TikaConverter - helper plugin that does various types of document
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4 | # conversion with Apache Tika
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5 | #
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6 | # A component of the Greenstone digital library software
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7 | # from the New Zealand Digital Library Project at the
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8 | # University of Waikato, New Zealand.
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9 | #
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10 | # Copyright (C) 2010 New Zealand Digital Library Project
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11 | #
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12 | # This program is free software; you can redistribute it and/or modify
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13 | # it under the terms of the GNU General Public License as published by
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14 | # the Free Software Foundation; either version 2 of the License, or
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15 | # (at your option) any later version.
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16 | #
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17 | # This program is distributed in the hope that it will be useful,
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18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 | # GNU General Public License for more details.
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21 | #
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22 | # You should have received a copy of the GNU General Public License
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23 | # along with this program; if not, write to the Free Software
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24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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25 | #
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26 | ###########################################################################
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27 | package TikaConverter;
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28 |
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29 | use BaseMediaConverter;
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30 |
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31 | use strict;
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32 | no strict 'refs'; # allow filehandles to be variables and viceversa
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33 |
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34 | use gsprintf 'gsprintf';
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35 |
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36 | # these two variables mustn't be initialised here or they will get stuck
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37 | # at those values.
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38 | our $tika_conversion_available;
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39 | our $no_tika_conversion_reason;
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40 |
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41 | BEGIN {
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42 | @TikaConverter::ISA = ('BaseMediaConverter');
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43 |
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44 | # Check that Tika is installed and available on the path
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45 | $tika_conversion_available = 1;
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46 | $no_tika_conversion_reason = "";
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47 |
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48 | if (!defined $ENV{'GEXT_TIKA'}) {
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49 | $tika_conversion_available = 0;
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50 | $no_tika_conversion_reason = "gexttikanotinstalled";
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51 | }
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52 | else {
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53 | my $gextpb_home = $ENV{'GEXT_TIKA'};
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54 | my $pbajar = &util::filename_cat($gextpb_home,"lib","java","tika-app.jar");
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55 |
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56 | if (!-e $pbajar) {
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57 | print STDERR "Failed to find $pbajar\n";
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58 | $tika_conversion_available = 0;
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59 | $no_tika_conversion_reason = "gexttikajarnotinstalled";
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60 | }
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61 | else {
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62 | # test to see if java is in path
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63 | my $cmd = "java 2>&1";
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64 | if ($ENV{'GSDLOS'} =~ /^windows/i) {
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65 | $cmd .= " >nul";
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66 | }
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67 | else {
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68 | $cmd .= " >/dev/null";
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69 | }
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70 |
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71 | my $status = system($cmd);
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72 | if ($status != 0) {
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73 | print STDERR "Testing for java\n";
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74 | print STDERR "Failed to run: $cmd\n";
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75 | print STDERR "$!\n";
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76 | $tika_conversion_available = 0;
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77 | $no_tika_conversion_reason = "tikanotinstalled";
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78 | }
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79 | }
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80 | }
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81 |
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82 | }
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83 |
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84 | my $arguments = [ ];
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85 |
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86 | my $options = { 'name' => "TikaConverter",
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87 | 'desc' => "{TikaConverter.desc}",
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88 | 'abstract' => "yes",
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89 | 'inherits' => "yes",
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90 | 'args' => $arguments };
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91 |
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92 | sub new {
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93 | my ($class) = shift (@_);
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94 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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95 | push(@$pluginlist, $class);
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96 |
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97 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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98 | push(@{$hashArgOptLists->{"OptList"}},$options);
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99 |
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100 | my $self = new BaseMediaConverter($pluginlist, $inputargs, $hashArgOptLists);
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101 |
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102 | if ($self->{'info_only'}) {
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103 | # don't worry about any options etc
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104 | return bless $self, $class;
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105 | }
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106 | if ($tika_conversion_available) {
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107 | my $gextpb_home = $ENV{'GEXT_TIKA'};
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108 | my $pbajar = &util::filename_cat($gextpb_home,"lib","java","tika-app.jar");
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109 | my $launch_cmd = "";
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110 |
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111 | $self->{'tika_launch_cmd'} = $launch_cmd;
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112 | }
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113 | else {
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114 | $self->{'no_tika_conversion_reason'} = $no_tika_conversion_reason;
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115 |
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116 | my $outhandle = $self->{'outhandle'};
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117 | &gsprintf($outhandle, "TikaConverter: {TikaConverter.noconversionavailable} ({TikaConverter.$no_tika_conversion_reason})\n");
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118 | }
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119 |
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120 | $self->{'tika_conversion_available'} = $tika_conversion_available;
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121 |
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122 | return bless $self, $class;
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123 |
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124 | }
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125 |
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126 | sub init {
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127 | my $self = shift(@_);
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128 | my ($verbosity, $outhandle, $failhandle) = @_;
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129 |
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130 | $self->{'ttmp_file_paths'} = ();
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131 | }
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132 |
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133 | sub deinit {
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134 | my $self = shift(@_);
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135 |
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136 | $self->clean_up_temporary_files();
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137 | }
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138 |
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139 |
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140 | sub convert {
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141 | my $self = shift(@_);
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142 | my ($source_file_full_path, $target_file_type) = @_;
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143 |
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144 | return 0 unless $tika_conversion_available;
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145 | # check the filename
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146 | return 0 if ( !-f $source_file_full_path);
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147 |
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148 | my $source_file_no_path = &File::Basename::basename($source_file_full_path);
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149 | # Determine the full name and path of the output file
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150 | my $target_file_path;
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151 | if ($self->{'enable_cache'}) {
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152 | $self->init_cache_for_file($source_file_full_path);
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153 | my $cache_dir = $self->{'cached_dir'};
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154 | my $file_root = $self->{'cached_file_root'};
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155 | #$file_root .= "_$convert_id" if ($convert_id ne "");
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156 | my $target_file = "$file_root.$target_file_type";
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157 | $target_file_path = &util::filename_cat($cache_dir,$target_file);
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158 | }
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159 | else {
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160 | # this is in gsdl/tmp. get a tmp filename in collection instead???
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161 | $target_file_path = &util::get_tmp_filename($target_file_type);
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162 | push(@{$self->{'ttmp_file_paths'}}, $target_file_path);
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163 | }
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164 |
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165 | # Generate and run the convert command
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166 | my $convert_cmd = $self->{'launch_cmd'};
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167 | $convert_cmd .= " -html" if ($target_file_type eq "html");
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168 | my $convert_command .= " \"$source_file_full_path\" \"$target_file_path\"";
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169 |
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170 | my $print_info = { 'message_prefix' => "Tika Conversion",
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171 | 'message' => "Converting $source_file_no_path to: $target_file_type" };
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172 | # $print_info->{'cache_mode'} = $cache_mode if ($cache_mode ne "");
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173 |
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174 | my ($regenerated,$result,$had_error)
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175 | = $self->autorun_general_cmd($convert_command,$source_file_full_path, $target_file_path,$print_info);
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176 | if ($had_error) {
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177 | return (0, $result,$target_file_path);
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178 | }
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179 | return (1, $result,$target_file_path);
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180 | }
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181 |
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182 | sub convert_without_result {
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183 | my $self = shift(@_);
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184 |
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185 | my $source_file_path = shift(@_);
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186 | my $target_file_type = shift(@_);
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187 | my $convert_options = shift(@_) || "";
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188 | my $convert_id = shift(@_) || "";
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189 |
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190 | return $self->convert($source_file_path,$target_file_type,
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191 | $convert_options,$convert_id,"without_result");
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192 | }
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193 |
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194 | sub clean_up_temporary_files {
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195 | my $self = shift(@_);
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196 |
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197 | foreach my $ttmp_file_path (@{$self->{'ttmp_file_paths'}}) {
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198 | if (-e $ttmp_file_path) {
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199 | &util::rm($ttmp_file_path);
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200 | }
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201 | }
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202 |
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203 | $self->{'ttmp_file_paths'} = ();
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204 | }
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205 |
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206 |
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207 |
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208 | 1;
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