1 | #!/usr/bin/perl -w
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2 |
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3 | ###########################################################################
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4 | #
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5 | # gsConvert.pl -- convert documents to HTML or TEXT format
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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) 1999-2002 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 | # gsConvert.pl converts documents in a range of formats to HTML or TEXT
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30 | # by exploiting third-party programs. The sources of these are usually found
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31 | # in the $GSDLHOME/packages directory, and the executables should live in
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32 | # $GSDLHOME/bin/$GSDLOS (which is on the search path).
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33 | #
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34 | # Currently, we can convert the following formats by using external
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35 | # conversion utilities:
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36 | # Microsoft Word (versions 2,6,7 [==95?], 8[==97?], 9[==2000?]), RTF,
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37 | # Adobe PDF, PostScript, MS PowerPoint (95 and 97), and MS Excel (95 and 97).
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38 | #
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39 | # We can try to convert any file to text with a perl implementation of the
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40 | # UNIX strings command.
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41 | #
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42 | # We try to convert Postscript files to text using "gs" which is often on
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43 | # *nix machines. We fall back to performing weak text extraction by using
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44 | # regular expressions.
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45 |
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46 | BEGIN {
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47 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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48 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
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49 | }
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50 |
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51 | use strict;
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52 |
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53 | use parsargv;
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54 | use util;
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55 | use FileUtils;
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56 | use Cwd;
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57 |
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58 | # Are we running on WinNT or Win2000 (or later)?
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59 | my $is_winnt_2000=eval {require Win32; return (Win32::IsWinNT()); return 0;};
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60 | if (!defined($is_winnt_2000)) {$is_winnt_2000=0;}
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61 |
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62 | my $use_strings;
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63 | my $pdf_tool;
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64 | my $pdf_complex;
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65 | my $pdf_nohidden;
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66 | my $pdf_zoom;
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67 | my $pdf_dpi;
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68 | my $pdf_ignore_images;
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69 | my $pdf_allow_images_only;
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70 | my $windows_scripting;
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71 | my $enc;
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72 |
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73 | sub print_usage
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74 | {
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75 | print STDERR "\n";
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76 | print STDERR "gsConvert.pl: Converts documents in a range of formats to html\n";
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77 | print STDERR " or text using third-party programs.\n\n";
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78 | print STDERR " usage: $0 [options] filename\n";
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79 | print STDERR " options:\n\t-type\tdoc|dot|pdf|ps|ppt|rtf|xls\t(input file type)\n";
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80 | print STDERR "\t-errlog\t<filename>\t(append err messages)\n";
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81 | print STDERR "\t-output\tauto|html|pretty_html|paged_pretty_html|paged_html|text|paged_text|pagedimg_jpg|pagedimg_gif|pagedimg_png|pagedimgtxt_jpg|pagedimgtxt_png\t(output file type)\n";
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82 | print STDERR "\t-timeout\t<max cpu seconds>\t(ulimit on unix systems)\n";
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83 | print STDERR "\t-use_strings\tuse strings to extract text if conversion fails\n";
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84 | print STDERR "\t-windows_scripting\tuse windows VB script (if available) to convert Microsoft Word and PPT documents\n";
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85 | print STDERR "\t-pdf_tool\tpdftohtml|xpdftools|pdfbox (not all output types are supported by every pdf_tool)\n";
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86 | print STDERR "\t-pdf_complex\tuse complex output when converting PDF to HTML\n";
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87 | print STDERR "\t-pdf_nohidden\tDon't attempt to extract hidden text from PDF files\n";
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88 | print STDERR "\t-pdf_ignore_images\tdon't attempt to extract images when\n";
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89 | print STDERR "\t\tconverting PDF to HTML\n";
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90 | print STDERR "\t-pdf_allow_images_only\tallow images only (continue even if no text is present when converting to HTML)\n";
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91 | print STDERR "\t-pdf_zoom\tfactor by which to zoom PDF (only useful if\n";
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92 | print STDERR "\t\t-pdf_complex is set\n";
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93 | print STDERR "\t-pdf_dpi\tSet the resolution in DPI of background images produced by xpdf's pdftohtml\n";
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94 | exit(1);
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95 | }
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96 |
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97 | my $faillogfile="";
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98 | my $timeout=0;
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99 | my $verbosity=0;
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100 |
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101 | sub main
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102 | {
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103 | my (@ARGV) = @_;
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104 | my ($input_type,$output_type,$verbose);
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105 |
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106 | # Dynamically figure out what the --type option can support, based on whether -windows_scripting
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107 | # is in use or not
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108 | my $default_type_re = "(doc|dot|pdf|ps|ppt|rtf|xls)";
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109 | #my $enhanced_type_re = "(docx?|dot|pdf|ps|pptx?|rtf|xlsx?)";
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110 | #my $enhanced_type_re = "(docx?|dot|pdf|ps|pptx?|rtf|xlsx?)";
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111 | # Currently only have VBA for Word and PPT(but no XLS)
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112 | my $enhanced_type_re = "(docx?|dot|pdf|ps|pptx?|rtf|xls)";
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113 |
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114 | my $type_re = $default_type_re;
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115 |
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116 | foreach my $a (@ARGV) {
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117 | if ($a =~ m/^windows_scripting$/i) {
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118 | $type_re = $enhanced_type_re;
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119 | }
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120 | }
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121 |
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122 | # read command-line arguments
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123 | if (!parsargv::parse(\@ARGV,
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124 | "type/$type_re/", \$input_type,
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125 | '/errlog/.*/', \$faillogfile,
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126 | 'output/(auto|html|text|pagedimg).*/', \$output_type, # regex includes html_multi and (paged_)pretty_html besides html, as well as pagedimgtxt_<imgext> besides pagedimg_<imgext>
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127 | 'timeout/\d+/0',\$timeout,
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128 | 'verbose/\d+/0', \$verbose,
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129 | 'windows_scripting',\$windows_scripting,
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130 | 'use_strings', \$use_strings,
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131 | 'pdf_tool/(pdftohtml|pdfbox|xpdftools)/', \$pdf_tool, # the old pdftohtml tool, pdfbox extensions or the newer xpdf-tools
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132 | 'pdf_complex', \$pdf_complex, # options for pdf_tool = pdftohtml (the old pdftohtml tool)
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133 | 'pdf_ignore_images', \$pdf_ignore_images,
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134 | 'pdf_allow_images_only', \$pdf_allow_images_only,
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135 | 'pdf_nohidden', \$pdf_nohidden,
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136 | 'pdf_zoom/\d+/2', \$pdf_zoom,
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137 | 'pdf_dpi/\d+/96', \$pdf_dpi
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138 | ))
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139 | {
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140 | print_usage();
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141 | }
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142 |
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143 | $verbosity=$verbose if defined $verbose;
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144 |
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145 | # Make sure the input file exists and can be opened for reading
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146 | if (scalar(@ARGV!=1)) {
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147 | print_usage();
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148 | }
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149 |
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150 | my $input_filename = $ARGV[0];
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151 | if (!-r $input_filename) {
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152 | print STDERR "Error: unable to open $input_filename for reading\n";
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153 | exit(1);
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154 | }
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155 |
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156 | # Deduce filenames
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157 | my ($tailname,$dirname,$suffix)
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158 | = File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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159 | my $output_filestem = &FileUtils::filenameConcatenate($dirname, "$tailname");
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160 |
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161 | if ($input_type eq "")
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162 | {
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163 | $input_type = lc (substr($suffix,1,length($suffix)-1));
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164 | }
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165 |
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166 | # Change to temporary working directory
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167 | my $stored_dir = cwd();
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168 | chdir ($dirname) || die "Unable to change to directory $dirname";
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169 |
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170 | # Select convert utility
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171 | if (!defined $input_type) {
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172 | print STDERR "Error: No filename extension or input type defined\n";
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173 | exit(1);
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174 | }
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175 | elsif ($input_type =~ m/^docx?$/ || $input_type eq "dot") {
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176 | print &convertDOC($input_filename, $output_filestem, $output_type);
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177 | print "\n";
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178 | }
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179 | elsif ($input_type eq "rtf") {
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180 | print &convertRTF($input_filename, $output_filestem, $output_type);
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181 | print "\n";
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182 | }
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183 | elsif ($input_type eq "pdf") {
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184 | print &convertPDF($dirname, $input_filename, $output_filestem, $output_type);
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185 | print "\n";
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186 | }
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187 | elsif ($input_type eq "ps") {
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188 | print &convertPS($dirname, $input_filename, $output_filestem, $output_type);
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189 | print "\n";
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190 | }
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191 | elsif ($input_type =~ m/pptx?$/) {
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192 | print &convertPPT($input_filename, $output_filestem, $output_type);
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193 | print "\n";
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194 | }
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195 | elsif ($input_type =~ m/xlsx?$/) {
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196 | print &convertXLS($input_filename, $output_filestem, $output_type);
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197 | print "\n";
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198 | }
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199 | else {
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200 | print STDERR "Error: Unable to convert type '$input_type'\n";
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201 | exit(1);
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202 | }
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203 |
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204 | # restore to original working directory
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205 | chdir ($stored_dir) || die "Unable to return to directory $stored_dir";
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206 |
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207 | }
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208 |
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209 | &main(@ARGV);
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210 |
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211 |
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212 |
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213 | # Document-type conversion functions
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214 | #
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215 | # The following functions attempt to convert documents from their
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216 | # input type to the specified output type. If no output type was
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217 | # given, then they first attempt HTML, and then TEXT.
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218 | #
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219 | # Each returns the output type ("html" or "text") or "fail" if no
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220 | # conversion is possible.
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221 |
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222 | # Convert a Microsoft word document
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223 |
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224 | sub convertDOC {
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225 | my ($input_filename, $output_filestem, $output_type) = @_;
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226 |
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227 | # Many .doc files are not in fact word documents!
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228 | my $realtype = &find_docfile_type($input_filename);
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229 |
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230 | if ($realtype eq "word6" || $realtype eq "word7"
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231 | || $realtype eq "word8" || $realtype eq "docx") {
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232 | return &convertWord678($input_filename, $output_filestem, $output_type);
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233 | } elsif ($realtype eq "rtf") {
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234 | return &convertRTF($input_filename, $output_filestem, $output_type);
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235 | } else {
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236 | return &convertAnything($input_filename, $output_filestem, $output_type);
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237 | }
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238 | }
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239 |
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240 | # Convert a Microsoft word 6/7/8 document
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241 |
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242 | sub convertWord678 {
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243 | my ($input_filename, $output_filestem, $output_type) = @_;
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244 |
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245 | my $success = 0;
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246 | if (!$output_type || ($output_type =~ m/html/i)){
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247 | if ($windows_scripting) {
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248 | $success = &native_doc_to_html($input_filename, $output_filestem);
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249 | }
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250 | else {
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251 | $success = &doc_to_html($input_filename, $output_filestem);
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252 | }
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253 | if ($success) {
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254 | return "html";
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255 | }
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256 | }
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257 | return &convertAnything($input_filename, $output_filestem, $output_type);
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258 | }
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259 |
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260 |
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261 | # Convert a Rich Text Format (RTF) file
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262 |
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263 | sub convertRTF {
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264 | my ($input_filename, $output_filestem, $output_type) = @_;
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265 |
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266 | my $success = 0;
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267 |
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268 | # Attempt specialised conversion to HTML
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269 | if (!$output_type || ($output_type =~ m/html/i)) {
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270 |
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271 | if ($windows_scripting) {
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272 | $success = &native_doc_to_html($input_filename, $output_filestem);
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273 | }
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274 | else {
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275 | $success = &rtf_to_html($input_filename, $output_filestem);
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276 | }
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277 | if ($success) {
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278 | return "html";
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279 | }
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280 | }
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281 |
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282 | # rtf is so ugly that's it's not worth running strings over.
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283 | # One day I'll write some quick'n'dirty regexps to try to extract text - jrm21
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284 | # return &convertAnything($input_filename, $output_filestem, $output_type);
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285 | return "fail";
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286 | }
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287 |
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288 |
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289 | # Convert an unidentified file
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290 |
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291 | sub convertAnything {
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292 | my ($input_filename, $output_filestem, $output_type) = @_;
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293 |
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294 | my $success = 0;
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295 |
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296 | # Attempt simple conversion to HTML
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297 | if (!$output_type || ($output_type =~ m/html/i)) {
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298 | $success = &any_to_html($input_filename, $output_filestem);
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299 | if ($success) {
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300 | return "html";
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301 | }
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302 | }
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303 |
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304 | # Convert to text
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305 | if (!$output_type || ($output_type =~ m/text/i)) {
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306 | $success = &any_to_text($input_filename, $output_filestem);
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307 | if ($success) {
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308 | return "text";
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309 | }
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310 | }
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311 | return "fail";
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312 | }
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313 |
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314 |
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315 |
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316 | # Convert an Adobe PDF document
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317 |
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318 | sub convertPDF {
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319 | my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
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320 |
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321 | my $success = 0;
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322 | $output_type =~ s/.*\-(.*)/$1/i;
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323 |
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324 | #print STDERR "@@@@@@@@ Using $pdf_tool for the conversion\n";
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325 |
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326 | # First determine which pdf conversion tool we're using among pdftohtml/pdfbox/xpdftools
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327 | # and then decide which conversion command to run based on the output type
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328 | # (pdfbox does not currently go through gsConvert.pl
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329 | # as PDFBoxConverter inherits from AutoLoadConverters)
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330 |
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331 | if ($pdf_tool eq "pdftohtml" ) { # old pdftohtml tool
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332 | # Attempt coversion to Image
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333 | if ($output_type =~ m/jp?g|gif|png/i) {
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334 | $success = &pdfps_to_img($dirname, $input_filename, $output_filestem, $output_type);
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335 | if ($success){
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336 | return "item";
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337 | }
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338 | }
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339 |
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340 | # Attempt conversion to HTML
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341 | # Uses the old pdftohtml that doesn't work for newer PDF versions
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342 | if ($output_type =~ m/^html/i) {
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343 | #if (!$output_type || ($output_type =~ m/^html/i)) {
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344 | $success = &pdf_to_html($dirname, $input_filename, $output_filestem);
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345 | if ($success) {
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346 | return "html";
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347 | }
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348 | }
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349 |
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350 | # Attempt conversion to TEXT (not for Windows, but PDFPlugin/PDFv1Plugin takes care of that
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351 | if (!$output_type || ($output_type =~ m/text/i)) {
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352 | $success = &pdf_to_text($dirname, $input_filename, $output_filestem);
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353 |
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354 | if ($success) {
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355 | return "text";
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356 | }
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357 | }
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358 | }
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359 |
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360 | elsif ($pdf_tool eq "xpdftools" ) {
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361 |
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362 | # default to paged_pretty_html output
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363 | if (!$output_type) {
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364 | $output_type = "paged_pretty_html";
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365 | }
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366 |
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367 | # Attempt coversion to Image
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368 | #if ($output_type =~ m/jp?g|gif|png/i) {
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369 | # $success = &pdfps_to_img($dirname, $input_filename, $output_filestem, $output_type);
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370 | # if ($success){
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371 | # return "item";
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372 | # }
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373 | #}
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374 |
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375 | # Attempt conversion to (paged) pretty HTML using the newer pdftohtml of Xpdftools.
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376 | if ($output_type =~ m/pretty_html$/i) {
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377 | $success = &xpdf_to_html($dirname, $input_filename, $output_filestem);
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378 | if ($success) {
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379 | return $output_type;
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380 | }
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381 | }
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382 |
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383 | # Attempt conversion to TEXT
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384 | # Proper paged_text processing not yet implemented with xpdf
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385 | if ($output_type =~ m/text/i) {
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386 | $success = &xpdf_to_text($dirname, $input_filename, $output_filestem, $output_type);
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387 |
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388 | if ($success) {
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389 | return "text";
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390 | }
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391 | }
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392 | }
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393 |
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394 | return "fail";
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395 |
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396 | }
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397 |
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398 |
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399 | # Convert an Adobe PostScript document
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400 |
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401 | sub convertPS {
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402 | my ($dirname,$input_filename, $output_filestem, $output_type) = @_;
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403 |
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404 | my $success = 0;
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405 | $output_type =~ s/.*\-(.*)/$1/i;
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406 | # Attempt coversion to Image
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407 | if ($output_type =~ m/jp?g|gif|png/i) {
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408 | $success = &pdfps_to_img($dirname, $input_filename, $output_filestem, $output_type);
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409 | if ($success){
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410 | return "item";
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411 | }
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412 | }
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413 |
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414 | # Attempt conversion to TEXT
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415 | if (!$output_type || ($output_type =~ m/text/i)) {
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416 | $success = &ps_to_text($input_filename, $output_filestem);
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417 | if ($success) {
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418 | return "text";
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419 | }
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420 | }
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421 | return "fail";
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422 | }
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423 |
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424 |
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425 | sub convertPPT {
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426 | my ($input_filename, $output_filestem, $output_type) = @_;
|
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427 | my $success = 0;
|
---|
428 |
|
---|
429 | my $ppt_convert_type = "";
|
---|
430 |
|
---|
431 | #if (!$output_type || $windows_scripting || ($output_type !~ m/html/i) || ($output_type !~ m/text/i)){
|
---|
432 | if ($windows_scripting && ($output_type !~ m/html/i) && ($output_type !~ m/text/i)){
|
---|
433 | if ($output_type =~ m/gif/i) {
|
---|
434 | $ppt_convert_type = "-g";
|
---|
435 | } elsif ($output_type =~ m/jp?g/i){
|
---|
436 | $ppt_convert_type = "-j";
|
---|
437 | } elsif ($output_type =~ m/png/i){
|
---|
438 | $ppt_convert_type = "-p";
|
---|
439 | }
|
---|
440 | my $vbScript = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, "bin",
|
---|
441 | $ENV{'GSDLOS'}, "pptextract");
|
---|
442 | $vbScript = "CScript //Nologo \"".$vbScript.".vbs\"" if ($ENV{'GSDLOS'} =~ m/^windows$/i); # now we use the .vbs VBScript
|
---|
443 | # $vbScript = "pptextract" if ($ENV{'GSDLOS'} =~ m/^windows$/i); # back when the pptextract.exe VB executable was used
|
---|
444 |
|
---|
445 | my $cmd = "";
|
---|
446 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
447 | # if the converting directory already exists
|
---|
448 | if (-d $output_filestem) {
|
---|
449 | print STDERR "**The conversion directory already exists\n";
|
---|
450 | return "item";
|
---|
451 | } else {
|
---|
452 | $cmd .= "$vbScript $ppt_convert_type \"$input_filename\" \"$output_filestem\"";
|
---|
453 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
454 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
|
---|
455 |
|
---|
456 | if (system($cmd) !=0) {
|
---|
457 | print STDERR "Powerpoint VB Scripting convert failed\n";
|
---|
458 | } else {
|
---|
459 | return "item";
|
---|
460 | }
|
---|
461 | }
|
---|
462 | } elsif (!$output_type || ($output_type =~ m/html/i)) {
|
---|
463 | # Attempt conversion to HTML
|
---|
464 | #if (!$output_type || ($output_type =~ m/html/i)) {
|
---|
465 | # formulate the command
|
---|
466 | my $cmd = "";
|
---|
467 | my $full_perl_path = &util::get_perl_exec();
|
---|
468 | $cmd .= "\"$full_perl_path\" -S ppttohtml.pl ";
|
---|
469 | $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
|
---|
470 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
471 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
|
---|
472 |
|
---|
473 | # execute the command
|
---|
474 | $!=0;
|
---|
475 | if (system($cmd)!=0)
|
---|
476 | {
|
---|
477 | print STDERR "Powerpoint 95/97 converter failed $!\n";
|
---|
478 | } else {
|
---|
479 | return "html";
|
---|
480 | }
|
---|
481 | }
|
---|
482 |
|
---|
483 | $success = &any_to_text($input_filename, $output_filestem);
|
---|
484 | if ($success) {
|
---|
485 | return "text";
|
---|
486 | }
|
---|
487 |
|
---|
488 | return "fail";
|
---|
489 | }
|
---|
490 |
|
---|
491 |
|
---|
492 | sub convertXLS {
|
---|
493 | my ($input_filename, $output_filestem, $output_type) = @_;
|
---|
494 |
|
---|
495 | my $success = 0;
|
---|
496 |
|
---|
497 | # Attempt conversion to HTML
|
---|
498 | if (!$output_type || ($output_type =~ m/html/i)) {
|
---|
499 | # formulate the command
|
---|
500 | my $cmd = "";
|
---|
501 | my $full_perl_path = &util::get_perl_exec();
|
---|
502 | $cmd .= "\"$full_perl_path\" -S xlstohtml.pl ";
|
---|
503 | $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
|
---|
504 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
505 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
|
---|
506 |
|
---|
507 |
|
---|
508 | # execute the command
|
---|
509 | $!=0;
|
---|
510 | if (system($cmd)!=0)
|
---|
511 | {
|
---|
512 | print STDERR "Excel 95/97 converter failed $!\n";
|
---|
513 | } else {
|
---|
514 | return "html";
|
---|
515 | }
|
---|
516 | }
|
---|
517 |
|
---|
518 | $success = &any_to_text($input_filename, $output_filestem);
|
---|
519 | if ($success) {
|
---|
520 | return "text";
|
---|
521 | }
|
---|
522 |
|
---|
523 | return "fail";
|
---|
524 | }
|
---|
525 |
|
---|
526 |
|
---|
527 |
|
---|
528 | # Find the real type of a .doc file
|
---|
529 | #
|
---|
530 | # We seem to have a lot of files with a .doc extension that are .rtf
|
---|
531 | # files or Word 5 files. This function attempts to tell the difference.
|
---|
532 | sub find_docfile_type {
|
---|
533 | my ($input_filename) = @_;
|
---|
534 |
|
---|
535 | if (($windows_scripting) && ($input_filename =~ m/\.docx$/)) {
|
---|
536 | return "docx";
|
---|
537 | }
|
---|
538 |
|
---|
539 | open(CHK, "<$input_filename");
|
---|
540 | binmode(CHK);
|
---|
541 | my $line = "";
|
---|
542 | my $first = 1;
|
---|
543 |
|
---|
544 | while (<CHK>) {
|
---|
545 |
|
---|
546 | $line = $_;
|
---|
547 |
|
---|
548 | if ($first) {
|
---|
549 | # check to see if this is an rtf file
|
---|
550 | if ($line =~ m/^\{\\rtf/) {
|
---|
551 | close(CHK);
|
---|
552 | return "rtf";
|
---|
553 | }
|
---|
554 | $first = 0;
|
---|
555 | }
|
---|
556 |
|
---|
557 | # is this is a word 6/7/8 document?
|
---|
558 | if ($line =~ m/Word\.Document\.([678])/) {
|
---|
559 | close(CHK);
|
---|
560 |
|
---|
561 | return "word$1";
|
---|
562 | }
|
---|
563 |
|
---|
564 | }
|
---|
565 |
|
---|
566 | return "unknown";
|
---|
567 | }
|
---|
568 |
|
---|
569 |
|
---|
570 | # Specific type-to-type conversions
|
---|
571 | #
|
---|
572 | # Each of the following functions attempts to convert a document from
|
---|
573 | # a specific format to another. If they succeed they return 1 and leave
|
---|
574 | # the output document(s) in the appropriate place; if they fail they
|
---|
575 | # return 0 and delete any working files.
|
---|
576 |
|
---|
577 |
|
---|
578 | # Attempt to convert a word document to html with the wv program
|
---|
579 | sub doc_to_html {
|
---|
580 | my ($input_filename, $output_filestem) = @_;
|
---|
581 |
|
---|
582 | my $wvware_status = 0;
|
---|
583 |
|
---|
584 | # need to ensure that the path to perl is quoted (in case there's spaces in it)
|
---|
585 | my $launch_cmd = "\"".&util::get_perl_exec()."\" -S wvware.pl \"$input_filename\" \"$output_filestem\" \"$faillogfile\" $verbosity $timeout";
|
---|
586 |
|
---|
587 | # print STDERR "***** wvware launch cmd = $launch_cmd\n";
|
---|
588 |
|
---|
589 | $wvware_status = system($launch_cmd)/256;
|
---|
590 | return $wvware_status;
|
---|
591 | }
|
---|
592 |
|
---|
593 | # Attempt to convert a word document to html with the word2html scripting program
|
---|
594 | sub native_doc_to_html {
|
---|
595 | my ($input_filename, $output_filestem) = @_;
|
---|
596 |
|
---|
597 | # build up the path to the doc-to-html conversion tool we're going to use
|
---|
598 | my $vbScript = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, "bin", $ENV{'GSDLOS'});
|
---|
599 |
|
---|
600 | if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
|
---|
601 | # if windows scripting with docx input, use new VBscript to get the local Word install (if
|
---|
602 | # any) to do the conversion, since docX can't be processed by word2html's windows_scripting
|
---|
603 |
|
---|
604 | if($input_filename =~ m/docx$/i) { # need to use full path to docx2html script,
|
---|
605 | # else script launch fails when there are error msgs
|
---|
606 | $vbScript = &FileUtils::filenameConcatenate($vbScript, "docx2html.vbs");
|
---|
607 | $vbScript = "CScript //Nologo \"$vbScript\""; # launch with CScript for error output in STDERR
|
---|
608 | # //Nologo flag avoids Microsoft's opening/logo msgs
|
---|
609 | print STDERR "About to use windows scripting to process docx file $input_filename.\n";
|
---|
610 | print STDERR " This may take some time. Please wait...\n";
|
---|
611 | }
|
---|
612 | else { # old doc versions. use the usual VB executable word2html for the
|
---|
613 | # conversion. Doesn't need full path, since bin\windows is on PATH
|
---|
614 | $vbScript = "word2html"; #$vbScript = "\"".&FileUtils::filenameConcatenate($vbScript, "word2html")."\"";
|
---|
615 | }
|
---|
616 | }
|
---|
617 | else { # not windows
|
---|
618 | $vbScript = "\"".&FileUtils::filenameConcatenate($vbScript, "word2html")."\"";
|
---|
619 | }
|
---|
620 |
|
---|
621 | if (-e "$output_filestem.html") {
|
---|
622 | print STDERR " The conversion file:\n";
|
---|
623 | print STDERR " $output_filestem.html\n";
|
---|
624 | print STDERR " ... already exists. Skipping\n";
|
---|
625 | return 1;
|
---|
626 | }
|
---|
627 |
|
---|
628 | my $cmd = "";
|
---|
629 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
630 | #$cmd .= "$vbScript \"$input_filename\" \"$output_filestem.html\"";
|
---|
631 | #$cmd .= "$vbScript $input_filename $output_filestem.html";
|
---|
632 | $cmd .= "$vbScript \"$input_filename\" \"$output_filestem.html\"";
|
---|
633 |
|
---|
634 | # redirecting STDERR
|
---|
635 |
|
---|
636 | $cmd .= " 2> \"$output_filestem.err\""
|
---|
637 | if ($ENV {'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
|
---|
638 | #print STDERR "@@@@@@@@@ cmd=$cmd\n";
|
---|
639 |
|
---|
640 | # execute the command
|
---|
641 | $!=0;
|
---|
642 | if (system($cmd)!=0)
|
---|
643 | {
|
---|
644 | print STDERR "Error executing $vbScript converter:$!\n";
|
---|
645 | if (-s "$output_filestem.err") {
|
---|
646 | open (ERRFILE, "<$output_filestem.err");
|
---|
647 |
|
---|
648 | my $write_to_fail_log=0;
|
---|
649 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
650 | {$write_to_fail_log=1;}
|
---|
651 |
|
---|
652 | my $line;
|
---|
653 | while ($line=<ERRFILE>) {
|
---|
654 | if ($line =~ m/\w/) {
|
---|
655 | print STDERR "$line";
|
---|
656 | print FAILLOG "$line" if ($write_to_fail_log);
|
---|
657 | }
|
---|
658 | if ($line !~ m/startup error/) {next;}
|
---|
659 | print STDERR " (given an invalid .DOC file?)\n";
|
---|
660 | print FAILLOG " (given an invalid .DOC file?)\n"
|
---|
661 | if ($write_to_fail_log);
|
---|
662 |
|
---|
663 | } # while ERRFILE
|
---|
664 | close FAILLOG if ($write_to_fail_log);
|
---|
665 | }
|
---|
666 | return 0; # we can try any_to_text
|
---|
667 | }
|
---|
668 |
|
---|
669 | # Was the conversion successful?
|
---|
670 | if (-s "$output_filestem.html") {
|
---|
671 | open(TMP, "$output_filestem.html");
|
---|
672 | my $line = <TMP>;
|
---|
673 | close(TMP);
|
---|
674 | if ($line && $line =~ m/html/i) {
|
---|
675 | &FileUtils::removeFiles("$output_filestem.err") if -e "$output_filestem.err";
|
---|
676 | return 1;
|
---|
677 | }
|
---|
678 | }
|
---|
679 |
|
---|
680 | # If here, an error of some sort occurred
|
---|
681 | &FileUtils::removeFiles("$output_filestem.html") if -e "$output_filestem.html";
|
---|
682 | if (-e "$output_filestem.err") {
|
---|
683 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile"))) {
|
---|
684 | open (ERRLOG,"$output_filestem.err");
|
---|
685 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
686 | close FAILLOG;
|
---|
687 | close ERRLOG;
|
---|
688 | }
|
---|
689 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
690 | }
|
---|
691 | return 0;
|
---|
692 | }
|
---|
693 |
|
---|
694 | # Attempt to convert an RTF document to html with rtftohtml
|
---|
695 | sub rtf_to_html {
|
---|
696 | my ($input_filename, $output_filestem) = @_;
|
---|
697 |
|
---|
698 | # formulate the command
|
---|
699 | my $cmd = "";
|
---|
700 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
701 | $cmd .= "rtftohtml";
|
---|
702 | #$cmd .= "rtf-converter";
|
---|
703 |
|
---|
704 | $cmd .= " -o \"$output_filestem.html\" \"$input_filename\"";
|
---|
705 |
|
---|
706 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
707 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
|
---|
708 |
|
---|
709 |
|
---|
710 | # execute the command
|
---|
711 | $!=0;
|
---|
712 | if (system($cmd)!=0)
|
---|
713 | {
|
---|
714 | print STDERR "Error executing rtf converter $!\n";
|
---|
715 | # don't currently bother printing out error log...
|
---|
716 | # keep going, in case it still created an HTML file...
|
---|
717 | }
|
---|
718 |
|
---|
719 | # Was the conversion successful?
|
---|
720 | my $was_successful=0;
|
---|
721 | if (-s "$output_filestem.html") {
|
---|
722 | # make sure we have some content other than header
|
---|
723 | open (HTML, "$output_filestem.html"); # what to do if fail?
|
---|
724 | my $line;
|
---|
725 | my $past_header=0;
|
---|
726 | while ($line=<HTML>) {
|
---|
727 |
|
---|
728 | if ($past_header == 0) {
|
---|
729 | if ($line =~ m/<body>/) {$past_header=1;}
|
---|
730 | next;
|
---|
731 | }
|
---|
732 |
|
---|
733 | $line =~ s/<[^>]+>//g;
|
---|
734 | if ($line =~ m/\w/ && $past_header) { # we found some content...
|
---|
735 | $was_successful=1;
|
---|
736 | last;
|
---|
737 | }
|
---|
738 | }
|
---|
739 | close HTML;
|
---|
740 | }
|
---|
741 |
|
---|
742 | if ($was_successful) {
|
---|
743 | &FileUtils::removeFiles("$output_filestem.err")
|
---|
744 | if (-e "$output_filestem.err");
|
---|
745 | # insert the (modified) table of contents, if it exists.
|
---|
746 | if (-e "${output_filestem}_ToC.html") {
|
---|
747 | &FileUtils::moveFiles("$output_filestem.html","$output_filestem.src");
|
---|
748 | my $open_failed=0;
|
---|
749 | open HTMLSRC, "$output_filestem.src" || ++$open_failed;
|
---|
750 | open TOC, "${output_filestem}_ToC.html" || ++$open_failed;
|
---|
751 | open HTML, ">$output_filestem.html" || ++$open_failed;
|
---|
752 |
|
---|
753 | if ($open_failed) {
|
---|
754 | close HTMLSRC;
|
---|
755 | close TOC;
|
---|
756 | close HTML;
|
---|
757 | &FileUtils::moveFiles("$output_filestem.src","$output_filestem.html");
|
---|
758 | return 1;
|
---|
759 | }
|
---|
760 |
|
---|
761 | # print out header info from src html.
|
---|
762 | while (defined($_ = <HTMLSRC>) && $_ =~ m/\w/) {
|
---|
763 | print HTML "$_";
|
---|
764 | }
|
---|
765 |
|
---|
766 | # print out table of contents, making links relative
|
---|
767 | <TOC>; <TOC>; # ignore first 2 lines
|
---|
768 | print HTML scalar(<TOC>); # line 3 = "<ol>\n"
|
---|
769 | my $line;
|
---|
770 | while ($line=<TOC>) {
|
---|
771 | $line =~ s@</body></html>$@@i ; # only last line has this
|
---|
772 | # make link relative
|
---|
773 | $line =~ s@href=\"[^\#]+@href=\"@i;
|
---|
774 | print HTML $line;
|
---|
775 | }
|
---|
776 | close TOC;
|
---|
777 |
|
---|
778 | # rest of html src
|
---|
779 | while (<HTMLSRC>) {
|
---|
780 | print HTML $_;
|
---|
781 | }
|
---|
782 | close HTMLSRC;
|
---|
783 | close HTML;
|
---|
784 |
|
---|
785 | &FileUtils::removeFiles("${output_filestem}_ToC.html");
|
---|
786 | &FileUtils::removeFiles("${output_filestem}.src");
|
---|
787 | }
|
---|
788 | # we don't yet do anything with footnotes ($output_filestem_fn.html) :(
|
---|
789 | return 1; # success
|
---|
790 | }
|
---|
791 |
|
---|
792 | if (-e "$output_filestem.err") {
|
---|
793 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
794 | {
|
---|
795 | print FAILLOG "Error - rtftohtml - couldn't extract text\n";
|
---|
796 | #print FAILLOG "Error - rtf-converter - couldn't extract text\n";
|
---|
797 | print FAILLOG " (rtf file might be too recent):\n";
|
---|
798 | open (ERRLOG, "$output_filestem.err");
|
---|
799 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
800 | close ERRLOG;
|
---|
801 | close FAILLOG;
|
---|
802 | }
|
---|
803 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
804 | }
|
---|
805 |
|
---|
806 | &FileUtils::removeFiles("$output_filestem.html") if (-e "$output_filestem.html");
|
---|
807 |
|
---|
808 | return 0;
|
---|
809 | }
|
---|
810 |
|
---|
811 |
|
---|
812 | # Convert a pdf file to html with the old pdftohtml command
|
---|
813 | # which only works for older PDF versions
|
---|
814 | sub pdf_to_html {
|
---|
815 | my ($dirname, $input_filename, $output_filestem) = @_;
|
---|
816 |
|
---|
817 | my $cmd = "";
|
---|
818 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
819 | my $full_perl_path = &util::get_perl_exec();
|
---|
820 | $cmd .= "\"$full_perl_path\" -S pdftohtml.pl -zoom $pdf_zoom";
|
---|
821 | $cmd .= " -c" if ($pdf_complex);
|
---|
822 | $cmd .= " -i" if ($pdf_ignore_images);
|
---|
823 | $cmd .= " -a" if ($pdf_allow_images_only);
|
---|
824 | $cmd .= " -hidden" unless ($pdf_nohidden);
|
---|
825 | $cmd .= " \"$input_filename\" \"$output_filestem\"";
|
---|
826 |
|
---|
827 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000) {
|
---|
828 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
829 | } else {
|
---|
830 | $cmd .= " > \"$output_filestem.err\"";
|
---|
831 | }
|
---|
832 |
|
---|
833 | $!=0;
|
---|
834 |
|
---|
835 | my $retval=system($cmd);
|
---|
836 | if ($retval!=0)
|
---|
837 | {
|
---|
838 | print STDERR "Error executing pdftohtml.pl";
|
---|
839 | if ($!) {print STDERR ": $!";}
|
---|
840 | print STDERR "\n";
|
---|
841 | }
|
---|
842 |
|
---|
843 | # make sure the converter made something
|
---|
844 | if ($retval!=0 || ! -s "$output_filestem.html")
|
---|
845 | {
|
---|
846 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
847 | # print out the converter's std err, if any
|
---|
848 | if (-s "$output_filestem.err") {
|
---|
849 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
850 | print STDERR "pdftohtml error log:\n";
|
---|
851 | while (<ERRLOG>) {
|
---|
852 | print STDERR "$_";
|
---|
853 | }
|
---|
854 | close ERRLOG;
|
---|
855 | }
|
---|
856 | #print STDERR "***********output filestem $output_filestem.html\n";
|
---|
857 | &FileUtils::removeFiles("$output_filestem.html") if (-e "$output_filestem.html");
|
---|
858 | if (-e "$output_filestem.err") {
|
---|
859 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
860 | {
|
---|
861 | open (ERRLOG, "$output_filestem.err");
|
---|
862 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
863 | close ERRLOG;
|
---|
864 | close FAILLOG;
|
---|
865 | }
|
---|
866 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
867 | }
|
---|
868 | return 0;
|
---|
869 | }
|
---|
870 |
|
---|
871 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
872 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
873 | return 1;
|
---|
874 | }
|
---|
875 |
|
---|
876 |
|
---|
877 | # Convert a pdf file to html with the newer Xpdftools' pdftohtml
|
---|
878 | # This generates "paged HTML" where extracted, selectable text is positioned
|
---|
879 | # over screenshots of each page.
|
---|
880 | # Since xpdf's pdftohtml fails if the output dir already exists and for easier
|
---|
881 | # naming, the output files are created in a "pages" subdirectory of the tmp
|
---|
882 | # location parent of $output_filestem instead
|
---|
883 | sub xpdf_to_html {
|
---|
884 | my ($dirname, $input_filename, $output_filestem) = @_;
|
---|
885 |
|
---|
886 | my $cmd = "";
|
---|
887 |
|
---|
888 | # build up the path to the doc-to-html conversion tool we're going to use
|
---|
889 | my $xpdf_pdftohtml = &FileUtils::filenameConcatenate(_get_xpdftools_bindir(), "pdftohtml");
|
---|
890 |
|
---|
891 | # We'll create the file by name $output_filestem during post-conversion processing.
|
---|
892 | # Note that Xpdf tools will only create its conversion products in a dir that does
|
---|
893 | # not yet exist. So we'll create this location as a subdir of the output_filestem's
|
---|
894 | # parent directory. The parent dir is the already generated tmp area for conversion. So:
|
---|
895 | # - tmpdir gs2build/tmp/<random-num> already exists at this stage
|
---|
896 | # - We'll create gs2build/tmp/<rand>/output_filestem.html later, during post-processing
|
---|
897 | # - For now, XPdftools will create gs2build/tmp/<rand>/pages and put its products in there.
|
---|
898 | my ($tailname, $tmp_dirname, $suffix)
|
---|
899 | = &File::Basename::fileparse($output_filestem, "\\.[^\\.]+\$");
|
---|
900 | $tmp_dirname = &FileUtils::filenameConcatenate($tmp_dirname, "pages");
|
---|
901 |
|
---|
902 | # xpdf's pdftohtml tool also takes a zoom factor, where a zoom of 1 is 100%
|
---|
903 | $cmd .= "\"$xpdf_pdftohtml\"";
|
---|
904 | # resolution, -r in DPI of background images, see https://www.xpdfreader.com/pdftohtml-man.html
|
---|
905 | $cmd .= " -r $pdf_dpi" if ($pdf_dpi);
|
---|
906 | $cmd .= " \"$input_filename\" \"$tmp_dirname\"";
|
---|
907 | #$cmd .= " \"$input_filename\" \"$output_filestem\"";
|
---|
908 |
|
---|
909 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000) {
|
---|
910 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
911 | } else {
|
---|
912 | $cmd .= " > \"$output_filestem.err\"";
|
---|
913 | }
|
---|
914 |
|
---|
915 | #print STDERR "@@@@ Running command: $cmd\n";
|
---|
916 |
|
---|
917 | $!=0;
|
---|
918 | my $retval=system($cmd);
|
---|
919 | if ($retval!=0)
|
---|
920 | {
|
---|
921 | print STDERR "Error executing xpdf's pdftohtml tool";
|
---|
922 | if ($!) {print STDERR ": $!";}
|
---|
923 | print STDERR "\n";
|
---|
924 | }
|
---|
925 |
|
---|
926 | # make sure the converter made something
|
---|
927 | if ($retval!=0 || ! -s &FileUtils::filenameConcatenate($tmp_dirname,"index.html"))
|
---|
928 | {
|
---|
929 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
930 | # print out the converter's std err, if any
|
---|
931 | if (-s "$output_filestem.err") {
|
---|
932 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
933 | print STDERR "pdftohtml error log:\n";
|
---|
934 | while (<ERRLOG>) {
|
---|
935 | print STDERR "$_";
|
---|
936 | }
|
---|
937 | close ERRLOG;
|
---|
938 | }
|
---|
939 | #print STDERR "***********output filestem $output_filestem.html\n";
|
---|
940 | &FileUtils::removeFiles("$tmp_dirname") if (-d "$tmp_dirname");
|
---|
941 | if (-e "$output_filestem.err") {
|
---|
942 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
943 | {
|
---|
944 | open (ERRLOG, "$output_filestem.err");
|
---|
945 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
946 | close ERRLOG;
|
---|
947 | close FAILLOG;
|
---|
948 | }
|
---|
949 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
950 | }
|
---|
951 | return 0;
|
---|
952 | }
|
---|
953 |
|
---|
954 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
955 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
956 | return 1;
|
---|
957 | }
|
---|
958 |
|
---|
959 | # Returns the path to xpdf-tools's containing bin dir appropriate for this machine's OS and bitness
|
---|
960 | sub _get_xpdftools_bindir {
|
---|
961 |
|
---|
962 | # build up the path to the containing bin dir of the xpdf conversion tool we're going to use
|
---|
963 | my $xpdf_tools_bin = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'}, "bin", $ENV{'GSDLOS'}, "xpdf-tools", "bin");
|
---|
964 | return $xpdf_tools_bin;
|
---|
965 | }
|
---|
966 |
|
---|
967 | # Convert a pdf file to various types of image with the convert command
|
---|
968 |
|
---|
969 | sub pdfps_to_img {
|
---|
970 | my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
|
---|
971 |
|
---|
972 | # Check that ImageMagick is installed and available on the path (except for Windows 95/98)
|
---|
973 | if (!($ENV{'GSDLOS'} eq "windows" && !Win32::IsWinNT())) {
|
---|
974 | my $imagick_cmd = "\"".&util::get_perl_exec()."\" -S gs-magick.pl";
|
---|
975 | $imagick_cmd = $imagick_cmd." --verbosity=$verbosity" if defined $verbosity;
|
---|
976 | my $result = `$imagick_cmd identify 2>&1`;
|
---|
977 |
|
---|
978 | # Linux and Windows return different values for "program not found".
|
---|
979 | # Linux returns -1 and Windows 256 for "program not found". But once they're
|
---|
980 | # converted to signed values, it will be -1 for Linux and 1 for Windows.
|
---|
981 | # Whenever we test for return values other than 0, shift by 8 and perform
|
---|
982 | # unsigned to signed status conversion on $? to get expected range of return vals
|
---|
983 | # Although gs-magick.pl already shifts its $? by 8, converts it to a signed value
|
---|
984 | # and then exits on that, by the time we get here, we need to do it again
|
---|
985 | my $status = $?;
|
---|
986 | $status >>= 8;
|
---|
987 | $status = (($status & 0x80) ? -(0x100 - ($status & 0xFF)) : $status);
|
---|
988 | if (($ENV{'GSDLOS'} ne "windows" && $status == -1) || ($ENV{'GSDLOS'} eq "windows" && $status == 1)) {
|
---|
989 | # if ($status == -1 || $status == 1) #if ($status == -1 || $status == 256) {
|
---|
990 | #ImageMagick is not installed, thus the convert utility is not available.
|
---|
991 | print STDERR "*** ImageMagick is not installed, the convert utility is not available. Unable to convert PDF/PS to images. Status: $status\n";
|
---|
992 | return 0;
|
---|
993 | }
|
---|
994 | }
|
---|
995 |
|
---|
996 | my $cmd = "";
|
---|
997 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
998 | $output_type =~ s/.*\_(.*)/$1/i;
|
---|
999 | my $full_perl_path = &util::get_perl_exec();
|
---|
1000 | $cmd .= "\"$full_perl_path\" -S pdfpstoimg.pl -convert_to $output_type \"$input_filename\" \"$output_filestem\"";
|
---|
1001 | if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000) {
|
---|
1002 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
1003 | } else {
|
---|
1004 | $cmd .= " > \"$output_filestem.err\"";
|
---|
1005 | }
|
---|
1006 |
|
---|
1007 | # don't include path on windows (to avoid having to play about
|
---|
1008 | # with quoting when GSDLHOME might contain spaces) but assume
|
---|
1009 | # that the PATH is set up correctly
|
---|
1010 | $!=0;
|
---|
1011 | my $retval=system($cmd);
|
---|
1012 | if ($retval!=0)
|
---|
1013 | {
|
---|
1014 | print STDERR "Error executing pdfpstoimg.pl";
|
---|
1015 | if ($!) {print STDERR ": $!";}
|
---|
1016 | print STDERR "\n";
|
---|
1017 | }
|
---|
1018 |
|
---|
1019 | #make sure the converter made something
|
---|
1020 | #if ($retval !=0) || ! -s "$output_filestem")
|
---|
1021 | if ($retval !=0)
|
---|
1022 | {
|
---|
1023 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
1024 | #print out the converter's std err, if any
|
---|
1025 | if (-s "$output_filestem.err") {
|
---|
1026 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
1027 | print STDERR "pdfpstoimg error log:\n";
|
---|
1028 | while (<ERRLOG>) {
|
---|
1029 | print STDERR "$_";
|
---|
1030 | }
|
---|
1031 | close ERRLOG;
|
---|
1032 | }
|
---|
1033 | #&FileUtils::removeFiles("$output_filestem.html") if (-e "$output_filestem.html");
|
---|
1034 | if (-e "$output_filestem.err") {
|
---|
1035 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
1036 | {
|
---|
1037 | open (ERRLOG, "$output_filestem.err");
|
---|
1038 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
1039 | close ERRLOG;
|
---|
1040 | close FAILLOG;
|
---|
1041 | }
|
---|
1042 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
1043 | }
|
---|
1044 | return 0;
|
---|
1045 | }
|
---|
1046 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
1047 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
1048 | return 1;
|
---|
1049 | }
|
---|
1050 |
|
---|
1051 | # Convert a PDF file to text with xpdftools' pdftotext command
|
---|
1052 | # Works for Windows too, whereas the old pdftotxt didn't
|
---|
1053 | sub xpdf_to_text {
|
---|
1054 | my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
|
---|
1055 |
|
---|
1056 | my $cmd = "";
|
---|
1057 |
|
---|
1058 | # build up the path to the doc-to-txt conversion tool we're going to use
|
---|
1059 | my $xpdf_pdftotxt = &FileUtils::filenameConcatenate(_get_xpdftools_bindir(), "pdftotext");
|
---|
1060 |
|
---|
1061 | # For xpdf's pdftotxt options, see https://www.xpdfreader.com/pdftotext-man.html
|
---|
1062 | $cmd .= "\"$xpdf_pdftotxt\"";
|
---|
1063 | if($enc) {
|
---|
1064 | $cmd .= " -enc $enc"; # decode the bytes in the file using the designated encoding scheme
|
---|
1065 | } else {
|
---|
1066 | # as per https://www.xpdfreader.com/pdftotext-man.html
|
---|
1067 | # xpdf's pdftotxt defaults to using Latin-1 encoding, should we default to UTF-8?
|
---|
1068 | $cmd .= " -enc UTF-8"; # see https://www.xpdfreader.com/xpdfrc-man.html
|
---|
1069 | }
|
---|
1070 |
|
---|
1071 | if ($output_type ne "paged_text") { # output_type eq "text", don't bother about page break markers
|
---|
1072 | $cmd .= " -nopgbrk";
|
---|
1073 | }
|
---|
1074 | # Avoid the silly solitary carriage returns (CR in Notepad) at the end
|
---|
1075 | # of lines that ends up as \n appended to the doc title
|
---|
1076 | # by setting the end of line marker to unix style solitary newline (LF or \n),
|
---|
1077 | # which doesn't end up in the doc title
|
---|
1078 | $cmd .= " -eol unix";
|
---|
1079 | $cmd .= " \"$input_filename\" \"$output_filestem.text\"";
|
---|
1080 |
|
---|
1081 | print STDERR "@@@@ Running command: $cmd\n";
|
---|
1082 |
|
---|
1083 | return _run_pdf_to_text_cmd($cmd, $output_filestem);
|
---|
1084 | }
|
---|
1085 |
|
---|
1086 | # Convert a PDF file to text with the pdftotext command
|
---|
1087 |
|
---|
1088 | sub pdf_to_text {
|
---|
1089 | my ($dirname, $input_filename, $output_filestem) = @_;
|
---|
1090 |
|
---|
1091 | my $cmd = "pdftotext \"$input_filename\" \"$output_filestem.text\"";
|
---|
1092 |
|
---|
1093 | return _run_pdf_to_text_cmd($cmd, $output_filestem);
|
---|
1094 | }
|
---|
1095 |
|
---|
1096 | sub _run_pdf_to_text_cmd {
|
---|
1097 | my ($cmd, $output_filestem) = @_;
|
---|
1098 |
|
---|
1099 | if ($ENV{'GSDLOS'} !~ m/^windows$/i) {
|
---|
1100 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
1101 | } else {
|
---|
1102 | $cmd .= " > \"$output_filestem.err\"";
|
---|
1103 | }
|
---|
1104 |
|
---|
1105 | if (system($cmd)!=0)
|
---|
1106 | {
|
---|
1107 | print STDERR "Error executing $cmd: $!\n";
|
---|
1108 | &FileUtils::removeFiles("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
1109 | }
|
---|
1110 |
|
---|
1111 | # make sure there is some extracted text.
|
---|
1112 | if (-e "$output_filestem.text") {
|
---|
1113 | open (EXTR_TEXT, "$output_filestem.text") || warn "open: $!";
|
---|
1114 | binmode(EXTR_TEXT); # just in case...
|
---|
1115 | my $line="";
|
---|
1116 | my $seen_text=0;
|
---|
1117 | while (($seen_text==0) && ($line=<EXTR_TEXT>)) {
|
---|
1118 | if ($line=~ m/\w/) {$seen_text=1;}
|
---|
1119 | }
|
---|
1120 | close EXTR_TEXT;
|
---|
1121 | if ($seen_text==0) { # no text was extracted
|
---|
1122 | print STDERR "Error: pdftotext found no text\n";
|
---|
1123 | &FileUtils::removeFiles("$output_filestem.text");
|
---|
1124 | }
|
---|
1125 | }
|
---|
1126 |
|
---|
1127 | # make sure the converter made something
|
---|
1128 | if (! -s "$output_filestem.text")
|
---|
1129 | {
|
---|
1130 | # print out the converters std err, if any
|
---|
1131 | if (-s "$output_filestem.err") {
|
---|
1132 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
1133 | print STDERR "pdftotext error log:\n";
|
---|
1134 | while (<ERRLOG>) {
|
---|
1135 | print STDERR "$_";
|
---|
1136 | }
|
---|
1137 | close ERRLOG;
|
---|
1138 | }
|
---|
1139 | # does this converter create a .out file?
|
---|
1140 | &FileUtils::removeFiles("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
1141 | &FileUtils::removeFiles("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
1142 | if (-e "$output_filestem.err") {
|
---|
1143 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
1144 | {
|
---|
1145 | open (ERRLOG,"$output_filestem.err");
|
---|
1146 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
1147 | close ERRLOG;
|
---|
1148 | close FAILLOG;
|
---|
1149 | }
|
---|
1150 | &FileUtils::removeFiles("$output_filestem.err");
|
---|
1151 | }
|
---|
1152 | return 0;
|
---|
1153 | }
|
---|
1154 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
1155 | return 1;
|
---|
1156 | }
|
---|
1157 |
|
---|
1158 | # Convert a PostScript document to text
|
---|
1159 | # note - just using "ps2ascii" isn't good enough, as it
|
---|
1160 | # returns 0 for a postscript interpreter error. ps2ascii is just
|
---|
1161 | # a wrapper to "gs" anyway, so we use that cmd here.
|
---|
1162 |
|
---|
1163 | sub ps_to_text {
|
---|
1164 | my ($input_filename, $output_filestem) = @_;
|
---|
1165 |
|
---|
1166 | my $error = "";
|
---|
1167 |
|
---|
1168 | # if we're on windows we'll fall straight through without attempting
|
---|
1169 | # to use gs
|
---|
1170 | if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
|
---|
1171 | $error = "Windows does not support gs";
|
---|
1172 |
|
---|
1173 | } else {
|
---|
1174 | my $cmd = "";
|
---|
1175 | if ($timeout) {$cmd = "ulimit -t $timeout; ";}
|
---|
1176 | $cmd .= "gs -q -dNODISPLAY -dNOBIND -dWRITESYSTEMDICT -dSIMPLE -c save ";
|
---|
1177 | $cmd .= "-f ps2ascii.ps \"$input_filename\" -c quit > \"$output_filestem.text\"";
|
---|
1178 | #$cmd .= "pstotext -output \"$output_filestem.text\" $input_filename\"";
|
---|
1179 | $cmd .= " 2> $output_filestem.err";
|
---|
1180 | $!=0;
|
---|
1181 |
|
---|
1182 | my $retcode=system($cmd);
|
---|
1183 | $retcode = $? >> 8; # see man perlfunc - system for this...
|
---|
1184 | # if system returns -1 | 127 (couldn't start program), look at $! for message
|
---|
1185 |
|
---|
1186 | if ($retcode!=0) {if ($!) {$error=$!;} else {$error="couldn't run.\n";}}
|
---|
1187 | elsif (! -e "$output_filestem.text") {
|
---|
1188 | $error="did not create output file.\n";
|
---|
1189 | }
|
---|
1190 | else
|
---|
1191 | { # make sure the interpreter didn't get an error. It is technically
|
---|
1192 | # possible for the actual text to start with this, but....
|
---|
1193 | open PSOUT, "$output_filestem.text";
|
---|
1194 | if (<PSOUT> =~ m/^Error: (.*)/) {
|
---|
1195 | $error="interpreter error - \"$1\"";
|
---|
1196 | }
|
---|
1197 | close PSOUT;
|
---|
1198 | }
|
---|
1199 | }
|
---|
1200 |
|
---|
1201 | if ($error ne "")
|
---|
1202 | {
|
---|
1203 | print STDERR "Warning: Error executing gs: $error\n";
|
---|
1204 | print STDERR "Resorting to Perl regular expressions to extract text from PostScript...\n";
|
---|
1205 | &FileUtils::removeFiles("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
1206 |
|
---|
1207 | if ("$faillogfile" ne "" && defined(open (FAILLOG, ">>$faillogfile")))
|
---|
1208 | {
|
---|
1209 | print FAILLOG "gs - $error\n";
|
---|
1210 | if (-e "$output_filestem.err") {
|
---|
1211 | open(ERRLOG, "$output_filestem.err");
|
---|
1212 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
1213 | close ERRLOG;
|
---|
1214 | }
|
---|
1215 | close FAILLOG;
|
---|
1216 | }
|
---|
1217 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
1218 |
|
---|
1219 |
|
---|
1220 | # Fine then. We'll just do a lousy job by ourselves...
|
---|
1221 | # Based on 5-line regexp sed script found at:
|
---|
1222 | # http://snark.ptc.spbu.ru/mail-archives/lout/brown/msg00003.html
|
---|
1223 | #
|
---|
1224 | print STDERR "Stripping text from postscript\n";
|
---|
1225 | my $errorcode=0;
|
---|
1226 | open (IN, "$input_filename")
|
---|
1227 | || ($errorcode=1, warn "Couldn't read file: $!");
|
---|
1228 | open (OUT, ">$output_filestem.text")
|
---|
1229 | || ($errorcode=1, warn "Couldn't write file: $!");
|
---|
1230 | if ($errorcode) {print STDERR "errors\n";return 0;}
|
---|
1231 |
|
---|
1232 | my $text=""; # this is for whole .ps file...
|
---|
1233 | $text = join('', <IN>); # see man perlport, under "System Resources"
|
---|
1234 | close IN;
|
---|
1235 |
|
---|
1236 | # Make sure this is a ps file...
|
---|
1237 | if ($text !~ m/^%!/) {
|
---|
1238 | print STDERR "Bad postscript header: not '%!'\n";
|
---|
1239 | if ($faillogfile ne "" && defined(open(FAILLOG, ">>$faillogfile")))
|
---|
1240 | {
|
---|
1241 | print FAILLOG "Bad postscript header: not '%!'\n";
|
---|
1242 | close FAILLOG;
|
---|
1243 | }
|
---|
1244 | return 0;
|
---|
1245 | }
|
---|
1246 |
|
---|
1247 | # if ps has Page data, then use it to delete all stuff before it.
|
---|
1248 | $text =~ s/^.*?%%Page:.*?\n//s; # treat string as single line
|
---|
1249 |
|
---|
1250 | # remove all leading non-data stuff
|
---|
1251 | $text =~ s/^.*?\(//s;
|
---|
1252 |
|
---|
1253 | # remove all newline chars for easier processing
|
---|
1254 | $text =~ s/\n//g;
|
---|
1255 |
|
---|
1256 | # Big assumption here - assume that if any co-ordinates are
|
---|
1257 | # given, then we are at the end of a sentence.
|
---|
1258 | $text =~ s/\)-?\d+\ -?\d+/\) \(\n\)/g;
|
---|
1259 |
|
---|
1260 | # special characters--
|
---|
1261 | $text =~ s/\(\|\)/\(\ - \)/g; # j -> em-dash?
|
---|
1262 |
|
---|
1263 | # ? ps text formatting (eg italics?) ?
|
---|
1264 | $text =~ s/Fn\(f\)/\(\{\)/g; # f -> {
|
---|
1265 | $text =~ s/Fn\(g\)/\(\}\)/g; # g -> }
|
---|
1266 | $text =~ s/Fn\(j\)/\(\|\)/g; # j -> |
|
---|
1267 | # default - remove the rest
|
---|
1268 | $text =~ s/\ ?F.\((.+?)\)/\($1\)/g;
|
---|
1269 |
|
---|
1270 | # attempt to add whitespace between words...
|
---|
1271 | # this is based purely on observation, and may be completely wrong...
|
---|
1272 | $text =~ s/([^F])[defghijkuy]\(/$1 \( /g;
|
---|
1273 | # eg I notice "b(" is sometimes NOT a space if preceded by a
|
---|
1274 | # negative number.
|
---|
1275 | $text =~ s/\)\d+ ?b\(/\) \( /g;
|
---|
1276 |
|
---|
1277 | # change quoted braces to brackets
|
---|
1278 | $text =~ s/([^\\])\\\(/$1\{/g;
|
---|
1279 | $text =~ s/([^\\])\\\)/$1\}/g ;
|
---|
1280 |
|
---|
1281 | # remove everything that is not between braces
|
---|
1282 | $text =~ s/\)([^\(\)])+?\(//sg ;
|
---|
1283 |
|
---|
1284 | # remove any Trailer eof stuff.
|
---|
1285 | $text =~ s/\)[^\)]*$//sg;
|
---|
1286 |
|
---|
1287 | ### ligatures have special characters...
|
---|
1288 | $text =~ s/\\013/ff/g;
|
---|
1289 | $text =~ s/\\014/fi/g;
|
---|
1290 | $text =~ s/\\015/fl/g;
|
---|
1291 | $text =~ s/\\016/ffi/g;
|
---|
1292 | $text =~ s/\\214/fi/g;
|
---|
1293 | $text =~ s/\\215/fl/g;
|
---|
1294 | $text =~ s/\\017/\n\* /g; # asterisk?
|
---|
1295 | $text =~ s/\\023/\023/g; # e acute ('e)
|
---|
1296 | $text =~ s/\\177/\252/g; # u"
|
---|
1297 | # $text =~ s/ ?? /\344/g; # a"
|
---|
1298 |
|
---|
1299 | print OUT "$text";
|
---|
1300 | close OUT;
|
---|
1301 | }
|
---|
1302 | # wrap the text - use a minimum length. ie, first space after this length.
|
---|
1303 | my $wrap_length=72;
|
---|
1304 | &FileUtils::moveFiles("$output_filestem.text", "$output_filestem.text.tmp");
|
---|
1305 | open INFILE, "$output_filestem.text.tmp" ||
|
---|
1306 | die "Couldn't open file: $!";
|
---|
1307 | open OUTFILE, ">$output_filestem.text" ||
|
---|
1308 | die "Couldn't open file for writing: $!";
|
---|
1309 | my $line="";
|
---|
1310 | while ($line=<INFILE>) {
|
---|
1311 | while (length($line)>0) {
|
---|
1312 | if (length($line)>$wrap_length) {
|
---|
1313 | $line =~ s/^(.{$wrap_length}[^\s]*)\s*//;
|
---|
1314 | print OUTFILE "$1\n";
|
---|
1315 | } else {
|
---|
1316 | print OUTFILE "$line";
|
---|
1317 | $line="";
|
---|
1318 | }
|
---|
1319 | }
|
---|
1320 | }
|
---|
1321 | close INFILE;
|
---|
1322 | close OUTFILE;
|
---|
1323 | &FileUtils::removeFiles("$output_filestem.text.tmp");
|
---|
1324 |
|
---|
1325 | &FileUtils::removeFiles("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
1326 | return 1;
|
---|
1327 | }
|
---|
1328 |
|
---|
1329 |
|
---|
1330 | # Convert any file to HTML with a crude perl implementation of the
|
---|
1331 | # UNIX strings command.
|
---|
1332 |
|
---|
1333 | sub any_to_html {
|
---|
1334 | my ($input_filename, $output_filestem) = @_;
|
---|
1335 |
|
---|
1336 | # First generate a text file
|
---|
1337 | return 0 unless (&any_to_text($input_filename, $output_filestem));
|
---|
1338 |
|
---|
1339 | # create an HTML file from the text file
|
---|
1340 | open(TEXT, "<$output_filestem.text");
|
---|
1341 | open(HTML, ">$output_filestem.html");
|
---|
1342 |
|
---|
1343 | print HTML "<html><head>\n";
|
---|
1344 | print HTML "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html\">\n";
|
---|
1345 | print HTML "<META NAME=\"GENERATOR\" CONTENT=\"Greenstone any_to_html\">\n";
|
---|
1346 | print HTML "</head><body>\n\n";
|
---|
1347 |
|
---|
1348 | my $line;
|
---|
1349 | while ($line=<TEXT>) {
|
---|
1350 | $line =~ s/</</g;
|
---|
1351 | $line =~ s/>/>/g;
|
---|
1352 | if ($line =~ m/^\s*$/) {
|
---|
1353 | print HTML "<p>";
|
---|
1354 | } else {
|
---|
1355 | print HTML "<br> ", $line;
|
---|
1356 | }
|
---|
1357 | }
|
---|
1358 | print HTML "\n</body></html>\n";
|
---|
1359 |
|
---|
1360 | close HTML;
|
---|
1361 | close TEXT;
|
---|
1362 |
|
---|
1363 | &FileUtils::removeFiles("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
1364 | return 1;
|
---|
1365 | }
|
---|
1366 |
|
---|
1367 | # Convert any file to TEXT with a crude perl implementation of the
|
---|
1368 | # UNIX strings command.
|
---|
1369 | # Note - this assumes ascii charsets :( (jrm21)
|
---|
1370 |
|
---|
1371 | sub any_to_text {
|
---|
1372 | my ($input_filename, $output_filestem) = @_;
|
---|
1373 |
|
---|
1374 | if (!$use_strings) {
|
---|
1375 | return 0;
|
---|
1376 | }
|
---|
1377 |
|
---|
1378 | print STDERR "\n**** In any to text****\n\n";
|
---|
1379 | open(IN, "<$input_filename") || return 0;
|
---|
1380 | binmode(IN);
|
---|
1381 | open(OUT, ">$output_filestem.text") || return 0;
|
---|
1382 |
|
---|
1383 | my ($line);
|
---|
1384 | my $output_line_count = 0;
|
---|
1385 | while (<IN>) {
|
---|
1386 | $line = $_;
|
---|
1387 |
|
---|
1388 | # delete anything that isn't a printable character
|
---|
1389 | $line =~ s/[^\040-\176]+/\n/sg;
|
---|
1390 |
|
---|
1391 | # delete any string less than 10 characters long
|
---|
1392 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
1393 | while ($line =~ m/^.{1,9}$/m) {
|
---|
1394 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
1395 | $line =~ s/\n+/\n/sg;
|
---|
1396 | }
|
---|
1397 |
|
---|
1398 | # remove extraneous whitespace
|
---|
1399 | $line =~ s/\n+/\n/gs;
|
---|
1400 | $line =~ s/^\n//gs;
|
---|
1401 |
|
---|
1402 | # output whatever is left
|
---|
1403 | if ($line =~ m/[^\n ]/) {
|
---|
1404 | print OUT $line;
|
---|
1405 | ++$output_line_count;
|
---|
1406 | }
|
---|
1407 | }
|
---|
1408 |
|
---|
1409 | close OUT;
|
---|
1410 | close IN;
|
---|
1411 |
|
---|
1412 | if ($output_line_count) { # try to protect against binary only formats
|
---|
1413 | return 1;
|
---|
1414 | }
|
---|
1415 |
|
---|
1416 | &FileUtils::removeFiles("$output_filestem.text");
|
---|
1417 | return 0;
|
---|
1418 |
|
---|
1419 | }
|
---|