1 |
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2 | ###########################################################################
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3 | #
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4 | # DSpacePlugin.pm -- plugin for importing a collection from DSpace
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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) 2004 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 |
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28 |
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29 | # This plugin takes "contents" and dublin_core.xml file, which contain
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30 | # Metadata and lists of associated files for a particular document
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31 | # and produces a document containing sections, one for each page.
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32 | # The files should be named "contents" and "dublin_core.xml". For each of
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33 | # document in DSpace, it is stored in one directory
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34 | #
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35 | # The format of the "contents" file is as follows:
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36 | #
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37 | # File.type bundle:ORIGINAL
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38 | # license.txt bundle:LICENSE
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39 | # The format of the "dublin_core.xml" file is as follows:
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40 | # The first line contains any metadata for the whole document
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41 | # <dublin_core>
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42 | # eg.
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43 | # <dcvalue element="Title" qualifier="">Snail farming</dcvalue>
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44 | # <dcvalue element="date" qualifier="">2004-10-15</dcvalue>
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45 | #
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46 |
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47 | package DSpacePlugin;
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48 |
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49 | use ReadTextFile;
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50 | use plugin;
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51 | use XMLParser;
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52 | use strict;
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53 | no strict 'refs'; # allow filehandles to be variables and viceversa
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54 |
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55 | sub BEGIN {
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56 | @DSpacePlugin::ISA = ('ReadTextFile');
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57 | }
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58 |
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59 | my $arguments =
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60 | [ { 'name' => "process_exp",
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61 | 'desc' => "{BasePlugin.process_exp}",
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62 | 'type' => "string",
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63 | 'deft' => &get_default_process_exp(),
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64 | 'reqd' => "no" },
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65 | { 'name' => "only_first_doc",
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66 | 'desc' => "{DSpacePlugin.only_first_doc}",
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67 | 'type' => "flag",
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68 | 'reqd' => "no" },
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69 | { 'name' => "first_inorder_ext",
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70 | 'desc' => "{DSpacePlugin.first_inorder_ext}",
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71 | 'type' => "string",
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72 | 'reqd' => "no" },
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73 | { 'name' => "first_inorder_mime",
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74 | 'desc' => "{DSpacePlugin.first_inorder_mime}",
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75 | 'type' => "flag",
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76 | 'reqd' => "no" },
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77 | { 'name' => "block_exp",
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78 | 'desc' => "{BasePlugin.block_exp}",
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79 | 'type' => "regexp",
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80 | 'deft' => &get_default_block_exp(),
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81 | 'reqd' => "no" }];
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82 |
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83 |
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84 | my $options = { 'name' => "DSpacePlugin",
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85 | 'desc' => "{DSpacePlugin.desc}",
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86 | 'inherits' => "yes",
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87 | 'abstract' => "no",
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88 | 'args' => $arguments };
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89 |
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90 |
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91 | my $primary_doc_lookup = { 'text/html' => '(?i)\.(gif|jpe?g|jpe|jpg|png|css)$' };
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92 |
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93 | # Important variation to regular plugin structure. Need to declare
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94 | # $self as global variable to file so XMLParser callback routines
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95 | # can access the content of the object.
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96 | my ($self);
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97 |
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98 | sub new {
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99 | my ($class) = shift (@_);
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100 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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101 | push(@$pluginlist, $class);
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102 |
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103 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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104 | push(@{$hashArgOptLists->{"OptList"}},$options);
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105 |
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106 | $self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists);
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107 |
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108 | if ($self->{'info_only'}) {
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109 | # don't worry about creating the XML parser as all we want is the
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110 | # list of plugin options
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111 | return bless $self, $class;
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112 | }
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113 |
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114 | #create XML::Parser object for parsing dublin_core.xml files
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115 | my $parser = new XML::Parser('Style' => 'Stream',
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116 | 'Handlers' => {'Char' => \&Char,
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117 | 'Doctype' => \&Doctype
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118 | });
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119 | $self->{'parser'} = $parser;
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120 | $self->{'extra_blocks'} = {};
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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 | sub get_default_process_exp {
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126 | my $self = shift (@_);
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127 |
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128 | return q^(?i)(contents)$^;
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129 | }
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130 |
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131 | # want to block all files except the "contents"
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132 | sub get_default_block_exp {
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133 | my $self = shift (@_);
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134 |
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135 | # Block handle and txt files if present. Specifically don't block dublin_core xml
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136 | return q^(?i)(handle|\.tx?t)$^;
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137 | }
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138 |
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139 | sub store_block_files_BACKUP
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140 | {
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141 | # Option of making blocking sensitive to files that are in directory
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142 | # This subroutine is not currently used! (relies on default block expression stopping all handle and .txt files)
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143 |
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144 | my $self =shift (@_);
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145 | my ($filename_full_path, $block_hash) = @_;
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146 |
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147 | my ($tailname, $contents_basedir, $suffix) = &File::Basename::fileparse($filename_full_path, "\\.[^\\.]+\$");
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148 | my $handle_filename = &util::filename_cat($contents_basedir,"handle");
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149 |
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150 | $block_hash->{'file_blocks'}->{$handle_filename} = 1 if (-e $handle_filename);
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151 | }
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152 |
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153 | sub read_content
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154 | {
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155 | my $self = shift (@_);
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156 | my ($dir, $only_first_doc, $first_inorder_ext, $first_inorder_mime, $mimetype_list) = @_;
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157 | my $outhandle = $self->{'outhandle'};
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158 |
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159 | my @fnamemime_list = ();
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160 | my @assocmime_list = ();
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161 |
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162 | my $content_fname = &util::filename_cat($dir,"contents");
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163 |
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164 | open(CIN,"<$content_fname")
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165 | || die "Unable to open $content_fname: $!\n";
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166 |
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167 | my $line;
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168 | my $pos = 0;
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169 |
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170 | while (defined ($line = <CIN>)) {
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171 | if ($line =~ m/^(.*)\s+bundle:ORIGINAL\s*$/) {
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172 | my $fname = $1;
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173 | my $mtype = $mimetype_list->[$pos];
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174 | my $fm_rec = { 'file' => $fname, 'mimetype' => $mtype};
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175 | push(@fnamemime_list,$fm_rec);
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176 | $pos++;
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177 | }
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178 | }
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179 | close CIN;
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180 |
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181 | if ($only_first_doc){
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182 | my ($first_fname, @rest_fnames) = @fnamemime_list;
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183 | @fnamemime_list = ($first_fname);
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184 | @assocmime_list = @rest_fnames;
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185 | }
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186 |
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187 | # allow user to specify the types of files (inorder)they would like to assign as
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188 | # a primary bitstream
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189 | if ($first_inorder_ext) {
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190 | # parse user-define file extension names
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191 | my @extfiles_list = split /,/, $first_inorder_ext;
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192 | my (@rest_fnames) = @fnamemime_list;
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193 | my @matched_list = ();
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194 | foreach my $file_ext (@extfiles_list) {
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195 | $pos = 0;
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196 | foreach my $allfiles (@fnamemime_list){
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197 | $allfiles->{'file'} =~ /^(.*)\.(.*?)$/;
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198 | my $allfiles_ext = $2;
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199 |
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200 | if ($allfiles_ext =~ /$file_ext/) {
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201 | print $outhandle "Existing file:$allfiles->{'file'} match the user-define File Extension:$file_ext\n";
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202 | push (@matched_list, $allfiles);
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203 |
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204 | # delete the matched extension file from the array
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205 | splice(@rest_fnames,$pos,1);
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206 |
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207 | return (\@matched_list, \@rest_fnames);
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208 |
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209 | }
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210 | $pos++;
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211 | }
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212 | }
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213 | }
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214 |
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215 | if ($first_inorder_mime) {
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216 | # parse user-define file mimetype
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217 | my @file_mime_list = split /,/, $first_inorder_mime;
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218 | my (@rest_fnames) = @fnamemime_list;
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219 | my @matched_list = ();
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220 | foreach my $file_mime (@file_mime_list) {
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221 | $pos = 0;
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222 | foreach my $allfiles (@fnamemime_list){
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223 | my $allfiles_mime = $allfiles->{'mimetype'};
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224 |
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225 | if ($allfiles_mime =~ /$file_mime/) {
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226 | print $outhandle "Existing file:$allfiles->{'file'} match the user-defined File MimeType:$file_mime\n";
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227 | push (@matched_list, $allfiles);
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228 |
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229 | # delete the matched MIMEType file from the array
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230 | splice(@rest_fnames,$pos,1);
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231 | return (\@matched_list, \@rest_fnames);
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232 | }
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233 | $pos++;
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234 | }
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235 | }
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236 | }
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237 | return (\@fnamemime_list, \@assocmime_list);
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238 | }
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239 |
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240 |
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241 | sub filemime_list_to_re
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242 | {
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243 | my $self = shift (@_);
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244 | my ($fnamemime_list) = @_;
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245 |
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246 | my @fname_list = map { "(".$_->{'file'}.")" } @$fnamemime_list;
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247 | my $fname_re = join("|",@fname_list);
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248 | $fname_re =~ s/\./\\\./g;
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249 |
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250 | return $fname_re;
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251 | }
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252 |
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253 | # Read dublin_core metadata from DSpace collection
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254 | sub metadata_read {
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255 | my $self = shift (@_);
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256 | my ($pluginfo, $base_dir, $file, $block_hash,
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257 | $extrametakeys, $extrametadata, $extrametafile,
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258 | $processor, $maxdocs, $gli) = @_;
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259 |
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260 | my $only_first_doc = $self->{'only_first_doc'};
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261 | my $first_inorder_ext = $self->{'first_inorder_ext'};
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262 | my $first_inorder_mime = $self->{'first_inorder_mime'};
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263 |
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264 | my $outhandle = $self->{'outhandle'};
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265 |
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266 | my $filename = &util::filename_cat($base_dir, $file);
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267 | # return 0 if $self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/;
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268 |
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269 | if ($filename !~ /dublin_core\.xml$/ || !-f $filename) {
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270 | return undef;
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271 | }
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272 |
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273 | print $outhandle "DSpacePlugin: extracting metadata from $file\n"
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274 | if $self->{'verbosity'} > 1;
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275 |
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276 | my ($dir) = $filename =~ /^(.*?)[^\/\\]*$/;
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277 |
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278 | eval {
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279 | $self->{'parser'}->parsefile($filename);
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280 | };
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281 |
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282 | if ($@) {
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283 | die "DSpacePlugin: ERROR $filename is not a well formed dublin_core.xml file ($@)\n";
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284 | }
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285 |
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286 | my $mimetype_list = $self->{'saved_metadata'}->{'dc.Format^mimetype'};
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287 | my ($doc_file_mimes, $assoc_file_mimes) = $self->read_content($dir, $only_first_doc, $first_inorder_ext,
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288 | $first_inorder_mime, $mimetype_list);
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289 |
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290 | my $file_re = $self->filemime_list_to_re($doc_file_mimes);
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291 |
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292 | if ($only_first_doc || $first_inorder_ext || $first_inorder_mime) {
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293 | foreach my $afm ( @$assoc_file_mimes ) {
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294 | my $full_af = &util::filename_cat($dir,$afm->{'file'});
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295 | $self->{'extra_blocks'}->{$full_af} = 1;
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296 | }
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297 | }
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298 | push(@$extrametakeys,$file_re);
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299 |
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300 | if (defined $self->{'saved_metadata'}->{'dc.Format^extent'}) {
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301 | delete $self->{'saved_metadata'}->{'dc.Format^extent'};
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302 | }
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303 |
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304 | if (defined $mimetype_list) {
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305 | delete $self->{'saved_metadata'}->{'dc.Format^mimetype'};
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306 |
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307 | # Temporarily store associate file info in metadata table
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308 | # This will be removed in 'extra_metadata' in BasePlugin and used
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309 | # to perform the actual file association (once the doc obj has
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310 | # been formed
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311 |
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312 | my $main_doc = $doc_file_mimes->[0];
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313 | my $md_mimetype = $main_doc->{'mimetype'};
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314 |
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315 | my $pd_lookup = $primary_doc_lookup->{$md_mimetype};
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316 |
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317 | if (defined $pd_lookup) {
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318 | my $filter_re = $pd_lookup;
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319 | @$assoc_file_mimes = grep { $_->{'file'} !~ m/$filter_re/ } @$assoc_file_mimes;
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320 | }
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321 |
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322 | my @gsdlassocfile_tobe
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323 | = map { &util::filename_cat($dir,$_->{'file'}).":".$_->{'mimetype'}.":" } @$assoc_file_mimes;
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324 | $self->{'saved_metadata'}->{'gsdlassocfile_tobe'} = \@gsdlassocfile_tobe;
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325 |
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326 | }
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327 |
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328 | $extrametadata->{$file_re} = $self->{'saved_metadata'};
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329 |
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330 | return 1;
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331 | }
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332 |
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333 |
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334 | # The DSpacePlugin read() function. We are not actually reading any documents
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335 | # here, just blocking ones that have been processed by metadata read.
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336 | #
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337 | # Returns 0 for a file its blocking, undef for any other
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338 | sub read {
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339 | my $self = shift (@_);
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340 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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341 | my $outhandle = $self->{'outhandle'};
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342 |
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343 | # Block all files except contents
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344 | my $filename = &util::filename_cat($base_dir, $file);
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345 | return 0 if $self->{'block_exp'} ne "" && $filename =~ /$self->{'block_exp'}/;
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346 |
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347 | my $assocfile = $metadata->{'assocfile'};
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348 |
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349 | return 0 if (($filename =~ /dublin_core\.xml$/) || ($filename =~ /contents$/));
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350 | return 0 if (defined $self->{'extra_blocks'}->{$filename});
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351 | return undef;
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352 | }
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353 |
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354 | sub Doctype {
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355 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
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356 |
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357 | die if ($name !~ /^dublin_core$/);
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358 | }
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359 |
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360 | sub StartTag {
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361 | my ($expat, $element) = @_;
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362 | if ($element eq "dublin_core") {
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363 | $self->{'saved_metadata'} = {};
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364 | } elsif ($element eq "dcvalue") {
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365 | my $metaname = $_{'element'};
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366 | my $qualifier = $_{'qualifier'}||"";
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367 | if ($metaname ne "description") {
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368 | $metaname .= "^$qualifier" if ($qualifier ne "none" && $qualifier ne "");
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369 | $self->{'metaname'} = "dc.\u$metaname";
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370 | }
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371 | }
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372 | }
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373 |
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374 | sub EndTag {
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375 | my ($expat, $element) = @_;
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376 |
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377 | if ($element eq "dcvalue") {
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378 | $self->{'metaname'} = "";
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379 | }
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380 | }
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381 |
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382 | sub Text {
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383 | if (defined ($self->{'metaname'}) && $self->{'metaname'} ne "") {
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384 | # $_ == Metadata content
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385 | my $mname = $self->{'metaname'};
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386 | if (defined $self->{'saved_metadata'}->{$mname}) {
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387 | # accumulate - add value to existing value(s)
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388 | if (ref ($self->{'saved_metadata'}->{$mname}) eq "ARRAY") {
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389 | push (@{$self->{'saved_metadata'}->{$mname}}, $_);
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390 | } else {
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391 | $self->{'saved_metadata'}->{$mname} =
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392 | [$self->{'saved_metadata'}->{$mname}, $_];
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393 | }
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394 | } else {
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395 | # accumulate - add value into (currently empty) array
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396 | $self->{'saved_metadata'}->{$mname} = [$_];
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397 | }
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398 |
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399 | }
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400 | }
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401 |
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402 | # This Char function overrides the one in XML::Parser::Stream to overcome a
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403 | # problem where $expat->{Text} is treated as the return value, slowing
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404 | # things down significantly in some cases.
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405 | sub Char {
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406 | use bytes; # Necessary to prevent encoding issues with XML::Parser 2.31+
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407 | $_[0]->{'Text'} .= $_[1];
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408 | return undef;
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409 | }
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410 |
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411 | 1;
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