1 | #!/usr/bin/perl -w
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2 |
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3 | use strict;
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4 | no strict 'refs'; # allow filehandles to be variables and viceversa
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5 |
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6 | use warnings;
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7 |
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8 | use Encode;
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9 | use JSON;
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10 |
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11 | # use LWP;
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12 |
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13 | use OAuth::Lite::Consumer;
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14 | use OAuth::Lite::AuthMethod;
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15 |
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16 | use URI::Escape;
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17 |
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18 | sub _data_api
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19 | {
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20 | my ($mode,$htid,$opt_seq,$opt_params) = @_;
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21 |
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22 | my $access_key = '7e6ee38bae';
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23 | my $secret_key = 'e0429c0394385486249b4a230702';
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24 |
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25 | my $request_url = "http://babel.hathitrust.org/cgi/htd/$mode/$htid";
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26 |
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27 | $request_url .= "/$opt_seq" if (defined $opt_seq);
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28 |
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29 | my $consumer = OAuth::Lite::Consumer->new( 'consumer_key' => $access_key,
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30 | 'consumer_secret' => $secret_key,
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31 | 'auth_method' => OAuth::Lite::AuthMethod::URL_QUERY );
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32 |
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33 | my $response = $consumer->request( 'method' => 'GET',
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34 | 'url' => $request_url,
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35 | 'params' => $opt_params );
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36 |
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37 | if (!$response->is_success()) {
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38 | print STDERR "**** Failed to retrieval any content from URL:\n";
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39 | print STDERR " ", $consumer->oauth_request->uri, "\n";
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40 | print "------\n";
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41 | print STDERR "**** Status: ", $response->status_line, "\n";
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42 | print "------\n";
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43 | print STDERR "**** Content: ", $response->content, "\n";
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44 | print "------\n";
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45 |
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46 | $response = undef;
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47 | }
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48 |
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49 | return $response;
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50 | }
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51 |
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52 |
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53 | sub pageimage_data_api
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54 | {
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55 | my ($htid,$seq_num,$ofilename) = @_;
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56 |
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57 | if (!-f $ofilename) {
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58 | print STDERR "Downloading PageImage $htid/$seq_num\n";
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59 |
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60 | my $response = _data_api("pageimage",$htid, $seq_num );
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61 | my $content = $response->content();
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62 |
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63 | if (open(IMGOUT,">$ofilename")) {
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64 | binmode(IMGOUT);
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65 | print IMGOUT $content;
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66 | close(IMGOUT);
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67 | }
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68 | else {
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69 | print STDERR "Error: Failed to open $ofilename for binary output\n";
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70 | print STDERR " $!\n";
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71 | }
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72 | }
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73 | else {
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74 | print STDERR "Skipping PageImage data API request\n";
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75 | print STDERR "=> downloaded file $ofilename already exists\n";
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76 | }
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77 | }
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78 |
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79 |
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80 |
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81 | sub pageocr_data_api
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82 | {
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83 | my ($htid,$seq_num,$ofilename) = @_;
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84 |
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85 | my $content = undef;
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86 |
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87 | if (((defined $ofilename) && (!-f $ofilename))
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88 | || (!defined $ofilename)) {
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89 | print STDERR "Downloading PageOCR (text) $htid/$seq_num\n";
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90 |
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91 | my $response = _data_api("pageocr",$htid, $seq_num );
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92 | $content = $response->content();
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93 |
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94 | if (open(TXTOUT,">$ofilename")) {
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95 | print TXTOUT $content;
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96 | close(TXTOUT);
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97 | }
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98 | else {
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99 | print STDERR "Error: Failed to open $ofilename for binary output\n";
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100 | print STDERR " $!\n";
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101 | }
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102 | }
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103 | else {
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104 | print STDERR "Skipping PageOCR Data API request\n";
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105 | print STDERR "=> Using cached version of file:\n $ofilename\n";
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106 |
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107 | if (open(JSIN,"<$ofilename")) {
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108 | binmode(JSIN,":utf8");
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109 |
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110 | my $line;
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111 | while (defined ($line=<JSIN>)) {
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112 | $content .= $line;
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113 | }
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114 | close(JSIN);
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115 | }
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116 | else {
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117 | print STDERR "Error: Failed to open cached file $ofilename for input\n";
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118 | print STDERR " $!\n";
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119 | }
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120 | }
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121 |
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122 | return $content;
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123 | }
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124 |
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125 | sub json_structure_data_api
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126 | {
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127 | my ($htid,$ofilename) = @_;
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128 |
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129 | my $json_content = "";
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130 |
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131 | if (!-f $ofilename) {
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132 | print STDERR "Downloading METS structure record for $htid\n";
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133 |
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134 | my $response = _data_api("structure",$htid, undef, {'alt' => "json"} );
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135 | $json_content = $response->content();
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136 |
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137 | if (open(JSOUT,">$ofilename")) {
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138 | binmode(JSOUT,":utf8");
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139 | print JSOUT $json_content;
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140 | close(JSOUT);
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141 | }
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142 | else {
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143 | print STDERR "Error: Failed to open $ofilename for output\n";
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144 | print STDERR " $!\n";
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145 | }
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146 |
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147 | }
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148 | else {
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149 | print STDERR "Skipping Structure Data API request\n";
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150 | print STDERR "=> Using cached version of JSON structure file:\n $ofilename\n";
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151 |
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152 | if (open(JSIN,"<$ofilename")) {
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153 | binmode(JSIN,":utf8");
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154 |
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155 | my $line;
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156 | while (defined ($line=<JSIN>)) {
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157 | $json_content .= $line;
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158 | }
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159 | close(JSIN);
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160 | }
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161 | else {
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162 | print STDERR "Error: Failed to open cached JSON file $ofilename for input\n";
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163 | print STDERR " $!\n";
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164 | }
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165 | }
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166 |
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167 | ## print "**** $json_content\n";
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168 |
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169 | my $json_content_utf8 = Encode::encode("utf8",$json_content);
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170 | my $json_data = decode_json $json_content_utf8;
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171 |
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172 | return $json_data;
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173 |
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174 |
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175 | }
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176 |
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177 |
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178 | # Example file
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179 |
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180 | #<PagedDocument>
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181 | # <Metadata name="Title">Matariki 1881</Metadata>
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182 | # <Metadata name="Date">18810423</Metadata>
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183 | # <Metadata name="Number">1</Metadata>
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184 | # <PageGroup>
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185 | # <Metadata name="Title">Supplementary Material</Metadata>
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186 | # <Page txtfile="abstracts/23__1abstract.txt">
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187 | # <Metadata name="Title">Abstract</Metadata>
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188 | # </Page>
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189 | # </PageGroup>
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190 | # <PageGroup>
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191 | # <Metadata name="Title">Newspaper pages</Metadata>
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192 | # <Page pagenum="1" imgfile="images/23__1_1.gif" txtfile="text/23__1_1.txt"/>
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193 | # <Page pagenum="2" imgfile="images/23__1_2.gif" txtfile="text/23__1_2.txt"/>
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194 | # <Page pagenum="3" imgfile="images/23__1_3.gif" txtfile="text/23__1_3.txt"/>
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195 | # </PageGroup>
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196 | #</PagedDocument>
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197 |
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198 | sub rec_paged_image_structure
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199 | {
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200 | my ($this_div,$pagenum,$elem_name,$depth,$htid,$file_id_map,$resource_output_dir) = @_;
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201 |
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202 | my ($local_output_dir) = ($resource_output_dir =~ m/^.*\/(.*?)$/);
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203 |
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204 | print PIOUT " " x $depth, "<$elem_name>\n";
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205 |
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206 | my $fptr_entry = $this_div->{'METS:fptr'};
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207 |
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208 | if (defined $fptr_entry) {
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209 | # hit a leaf node
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210 |
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211 | my $fptr_array = undef;
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212 |
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213 | if (ref $fptr_entry eq "HASH") {
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214 | $fptr_array = [ $fptr_entry ];
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215 | }
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216 | else {
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217 | $fptr_array = $fptr_entry;
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218 | }
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219 |
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220 | my $imgfile = undef;
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221 | my $txtfile = undef;
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222 |
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223 | foreach my $fptr_hash (@$fptr_array) {
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224 | my $fileid = $fptr_hash->{'FILEID'};
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225 |
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226 | ## print STDERR "Looking up fileid = $fileid\n";
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227 |
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228 | my $file = $file_id_map->{$fileid};
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229 | my $seq = $file->{'SEQ'};
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230 | my $href = $file->{'METS:FLocat'}->{'xlink:href'};
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231 |
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232 | if ($file->{'USE'} =~ m/\bimage\b/i) {
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233 | $imgfile = "$local_output_dir/$href";
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234 | my $full_imgfile = "$resource_output_dir/$href";
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235 | pageimage_data_api($htid,$seq,$full_imgfile);
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236 | }
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237 | elsif ($file->{'USE'} =~ m/\bocr\b/i) {
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238 | $txtfile = "$local_output_dir/$href";
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239 | my $full_txtfile = "$resource_output_dir/$href";
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240 | pageocr_data_api($htid,$seq,$full_txtfile);
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241 | }
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242 | }
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243 | # Generate line along the following lines
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244 |
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245 | # <Page pagenum="1" imgfile="images/23__1_1.gif" txtfile="text/23__1_1.txt"/>
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246 | print PIOUT " " x ($depth+1), "<Page ";
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247 | print PIOUT "pagenum=\"$pagenum\" " if defined $pagenum;
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248 | print PIOUT "imgfile=\"$imgfile\" " if defined $imgfile;
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249 | print PIOUT "txtfile=\"$txtfile\" " if defined $txtfile;
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250 | print PIOUT "/>\n";
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251 |
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252 | }
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253 |
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254 | # Now process any child divs
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255 |
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256 | my $div_entry = $this_div->{'METS:div'};
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257 |
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258 | if (defined $div_entry) {
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259 |
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260 | my $div_array = undef;
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261 |
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262 | if (ref $div_entry eq "HASH") {
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263 | # upgrade single entry to array
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264 | $div_array = [ $div_entry ];
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265 | }
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266 | else {
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267 | $div_array = $div_entry;
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268 | }
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269 |
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270 | foreach my $div_hash (@$div_array) {
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271 |
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272 | my $pagenum = $div_hash->{'ORDER'};
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273 |
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274 | rec_paged_image_structure($div_hash,$pagenum,"PageGroup",$depth+1,$htid,$file_id_map,$resource_output_dir);
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275 | }
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276 | }
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277 |
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278 |
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279 | print PIOUT " " x $depth, "</$elem_name>\n";
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280 |
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281 | }
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282 |
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283 | sub generate_paged_image_structure
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284 | {
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285 | my ($toplevel_div,$htid,$file_id_map,$ofilename) = @_;
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286 |
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287 | print STDERR "Generating PageImage file: $ofilename\n";
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288 |
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289 | my ($resource_output_dir) = ($ofilename =~ m/^(.*)\..+?$/);
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290 | if (!-d $resource_output_dir) {
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291 | mkdir $resource_output_dir;
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292 | }
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293 |
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294 | if (open(PIOUT,">$ofilename")) {
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295 | binmode(PIOUT,":utf8");
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296 |
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297 | rec_paged_image_structure($toplevel_div,1,"PageDocument",0,$htid,$file_id_map,$resource_output_dir);
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298 |
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299 | close(PIOUT);
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300 | }
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301 | else {
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302 | print STDERR "Error: Failed to open $ofilename for output\n";
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303 | print STDERR " $!\n";
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304 | }
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305 |
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306 |
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307 |
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308 | }
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309 |
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310 |
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311 | sub download_ht_doc
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312 | {
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313 | my ($cat_key,$htid,$ofilename) = @_;
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314 |
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315 | my $json_data = json_structure_data_api($htid,$ofilename);
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316 |
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317 | # Map in the IDs from:
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318 | # METS:mets->METS:fileSec->METS:fileGrp
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319 |
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320 | my $file_sec_ids = {};
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321 |
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322 | my $file_grp_array = $json_data->{'METS:mets'}->{'METS:fileSec'}->{'METS:fileGrp'};
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323 |
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324 | # print "**** num file grps = ", scalar(@$file_grp_array), "\n";
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325 |
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326 | foreach my $file_grp (@$file_grp_array) {
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327 |
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328 | my $use = $file_grp->{'USE'};
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329 |
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330 | my $file_entry = $file_grp->{'METS:file'};
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331 |
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332 | my $file_array = undef;
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333 |
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334 | if (ref $file_entry eq "HASH") {
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335 | # upgrade single entry into array
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336 | $file_array = [ $file_entry ];
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337 | }
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338 | else {
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339 | $file_array = $file_entry;
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340 | }
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341 |
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342 | # print "**** num files = ", scalar(@$file_array), "\n";
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343 |
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344 | foreach my $file_hash (@$file_array) {
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345 | # push file_grp USE attribute down into each file entry (to make file easier later on)
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346 | $file_hash->{'USE'} = $use;
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347 |
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348 | my $file_id = $file_hash->{'ID'};
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349 | $file_sec_ids->{$file_id} = $file_hash;
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350 |
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351 | # print "file id = $file_id\n";
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352 | }
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353 |
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354 | }
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355 |
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356 | # METS:mets->METS:structMap->{nested METS:div}+
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357 |
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358 | my $struct_map_array = $json_data->{'METS:mets'}->{'METS:structMap'};
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359 | my $toplevel_div = $struct_map_array->{'METS:div'};
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360 |
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361 | my $pi_filename = $ofilename;
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362 | $pi_filename =~ s/_structure\.json$/_item.xml/;
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363 |
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364 | generate_paged_image_structure($toplevel_div,$htid,$file_sec_ids,$pi_filename);
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365 |
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366 |
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367 | ## print "**** json_content = $json_content_utf8\n\n";
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368 |
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369 | exit 0;
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370 |
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371 | }
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372 |
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373 | sub read_json_file
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374 | {
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375 | my ($filename) = @_;
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376 |
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377 | print STDERR "+ Proccessing file: $filename\n";
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378 |
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379 | my $json_file_content = "";
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380 | open(JSON_FILE, "<$filename");
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381 | binmode(JSON_FILE,":utf8");
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382 |
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383 | my $line;
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384 | while (defined ($line=<JSON_FILE>)) {
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385 | $json_file_content .= $line;
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386 | }
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387 |
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388 | close(JSON_FILE);
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389 |
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390 | my $json_file_content_utf8 = Encode::encode("utf8",$json_file_content);
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391 | my $json_data = decode_json $json_file_content_utf8;
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392 |
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393 | my $record_hash = $json_data->{'records'};
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394 | my @record_keys = keys %$record_hash;
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395 | my $primary_cat_key = shift @record_keys;
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396 |
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397 | my $items_array = $json_data->{'items'};
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398 | my $num_items = scalar(@$items_array);
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399 |
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400 | my $num_pd = 0;
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401 |
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402 | foreach my $item (@$items_array) {
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403 |
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404 | my $htid = $item->{'htid'};
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405 | my $rights_code = $item->{'rightsCode'};
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406 |
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407 | # print "htid = $htid\n";
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408 | # print "Rights code = $rights_code\n" if defined $rights_code;
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409 |
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410 | if (defined($rights_code) && ($rights_code eq "pd")) {
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411 | # in the public domain
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412 | $num_pd++;
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413 |
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414 | my $htid_safe = uri_escape($htid);
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415 |
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416 | my $ofilename = $filename;
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417 | $ofilename =~ s/\.json/_structure.json/;
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418 |
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419 | download_ht_doc($primary_cat_key,$htid,$ofilename);
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420 |
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421 | # bail out at first public domain version of document
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422 | last;
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423 | }
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424 | }
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425 |
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426 | # if ($num_pd==0) {
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427 | # print "++ $num_items item(s)\n";
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428 | # }
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429 | # else {
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430 | # print "++ $num_items item(s) *of* *which* $num_pd is/are in the public domain\n";
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431 | # }
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432 |
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433 | }
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434 |
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435 |
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436 | sub process_dir
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437 | {
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438 | my ($full_dir) = @_;
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439 |
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440 | # print "Processing directory: $full_dir\n";
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441 |
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442 | if (opendir(DIN, $full_dir)) {
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443 | my @dir_content = grep { $_ !~ m/^\./ } readdir(DIN);
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444 | closedir DIN;
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445 |
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446 | foreach my $df (@dir_content) {
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447 | my $full_df = "$full_dir/$df";
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448 | if (-d $full_df) {
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449 | my $full_sub_dir = $full_df;
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450 | process_dir($full_sub_dir);
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451 | }
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452 | else {
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453 | # file
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454 | my $full_file = $full_df;
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455 | if ($full_file =~ m/\.json$/) {
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456 | read_json_file($full_file);
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457 | }
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458 | }
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459 | }
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460 |
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461 | }
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462 | else {
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463 |
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464 | print STDERR "Error: Failed to open directory: $full_dir\n";
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465 | print STDERR " $!\n";
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466 | }
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467 |
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468 | }
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469 |
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470 |
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471 | sub main
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472 | {
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473 | my ($argv_ref) = @_;
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474 |
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475 | my $toplevel_dir = shift @$argv_ref || "output";
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476 |
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477 |
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478 | $toplevel_dir =~ s/\/$//; # remove any trailing /
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479 |
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480 | process_dir($toplevel_dir);
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481 |
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482 | }
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483 |
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484 | main(\@ARGV);
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