[1445] | 1 | #!/usr/bin/perl -w
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| 2 |
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| 3 | ###########################################################################
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| 4 | #
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[2032] | 5 | # gsConvert.pl -- convert documents to HTML or TEXT format
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[1445] | 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 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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[2755] | 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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[1445] | 33 | #
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[2755] | 34 | # Currently, we can convert Microsoft Word, RTF, Adobe PDF and PostScript
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| 35 | # using specialised conversion utilities. We can try to convert any file to
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| 36 | # text with a perl implementation of the UNIX strings command.
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[2032] | 37 | #
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| 38 | # We try to convert Postscript files to text using "gs" which is often on
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[2755] | 39 | # *nix machines. We fall back to performing weak text extraction by using
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| 40 | # regular expressions.
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[1445] | 41 |
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| 42 | BEGIN {
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| 43 | die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
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| 44 | unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
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| 45 | }
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| 46 |
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| 47 | use parsargv;
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| 48 | use util;
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| 49 | use Cwd;
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| 50 | use File::Basename;
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| 51 |
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[2755] | 52 | # Are we running on WinNT or Win2000 (or later)?
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| 53 | my $is_winnt_2000=eval {require Win32; return (Win32::IsWinNT()); return 0;};
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| 54 | if (!defined($is_winnt_2000)) {$is_winnt_2000=0;}
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[1445] | 55 |
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| 56 | sub print_usage
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| 57 | {
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[1970] | 58 | print STDERR "\n";
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| 59 | print STDERR "gsConvert.pl: Converts documents in a range of formats to html\n";
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| 60 | print STDERR " or text using third-party programs.\n\n";
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| 61 | print STDERR " usage: $0 [options] filename\n";
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[2977] | 62 | print STDERR " options:\n\t-type\tdoc|pdf|ps|ppt|rtf\t(input file type)\n";
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[2755] | 63 | print STDERR "\t-errlog\t<filename>\t(append err messages)\n";
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| 64 | print STDERR "\t-output\thtml|text\n";
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| 65 | print STDERR "\t-timeout\t<max cpu seconds>\t(ulimit on unix systems)\n";
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[1445] | 66 | exit(1);
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| 67 | }
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| 68 |
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[2755] | 69 | my $faillogfile="";
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[1445] | 70 |
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| 71 | sub main
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| 72 | {
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| 73 | my (@ARGV) = @_;
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[1692] | 74 | my ($input_type,$output_type,$verbose,$timeout);
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[1960] | 75 |
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[1692] | 76 | $timeout = 0;
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[1445] | 77 | # read command-line arguments
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| 78 | if (!parsargv::parse(\@ARGV,
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[2977] | 79 | 'type/(doc|pdf|ps|ppt|rtf)/', \$input_type,
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[2755] | 80 | '/errlog/.*/', \$faillogfile,
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[1445] | 81 | 'output/(html|text)/', \$output_type,
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[1692] | 82 | 'timeout/\d+/0',\$timeout,
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[1445] | 83 | 'verbose/\d+/0', \$verbose))
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| 84 | {
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| 85 | print_usage();
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| 86 | }
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| 87 |
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| 88 | # Make sure the input file exists and can be opened for reading
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| 89 | if (scalar(@ARGV!=1)) {
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| 90 | print_usage();
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| 91 | }
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[1928] | 92 |
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[1445] | 93 | my $input_filename = $ARGV[0];
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| 94 | if (!-r $input_filename) {
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| 95 | print STDERR "Error: unable to open $input_filename for reading\n";
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| 96 | exit(1);
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| 97 | }
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| 98 |
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| 99 | # Deduce filenames
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| 100 | my ($tailname,$dirname,$suffix)
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[2241] | 101 | = File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
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| 102 | my $output_filestem = &util::filename_cat($dirname, "$tailname");
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[1445] | 103 |
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| 104 | if ($input_type eq "")
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| 105 | {
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[2241] | 106 | $input_type = lc (substr($suffix,1,length($suffix)-1));
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[1445] | 107 | }
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| 108 |
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| 109 | # Change to temporary working directory
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| 110 | my $stored_dir = cwd();
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| 111 | chdir ($dirname) || die "Unable to change to directory $dirname";
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| 112 |
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| 113 | # Select convert utility
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| 114 | if (!defined $input_type) {
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| 115 | print STDERR "Error: No filename extension or input type defined\n";
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| 116 | exit(1);
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| 117 | }
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| 118 | elsif ($input_type eq "doc") {
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| 119 | print &convertDOC($input_filename, $output_filestem, $output_type);
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| 120 | print "\n";
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| 121 | }
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[1684] | 122 | elsif ($input_type eq "rtf") {
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| 123 | print &convertRTF($input_filename, $output_filestem, $output_type);
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| 124 | print "\n";
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| 125 | }
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[1445] | 126 | elsif ($input_type eq "pdf") {
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| 127 | print &convertPDF($dirname, $input_filename, $output_filestem, $output_type);
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| 128 | print "\n";
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| 129 | }
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| 130 | elsif ($input_type eq "ps") {
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| 131 | print &convertPS($input_filename, $output_filestem, $output_type);
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| 132 | print "\n";
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| 133 | }
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[2977] | 134 | elsif ($input_type eq "ppt") {
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| 135 | print &convertPPT($input_filename, $output_filestem, $output_type);
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| 136 | print "\n";
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| 137 | }
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[1445] | 138 | else {
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| 139 | print STDERR "Error: Unable to convert type '$input_type'\n";
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| 140 | exit(1);
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| 141 | }
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| 142 |
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| 143 | # restore to original working directory
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| 144 | chdir ($stored_dir) || die "Unable to return to directory $stored_dir";
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| 145 |
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| 146 | }
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| 147 |
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| 148 | &main(@ARGV);
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| 149 |
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| 150 |
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| 151 |
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[2241] | 152 | # Document-type conversion functions
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[1445] | 153 | #
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| 154 | # The following functions attempt to convert documents from their
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| 155 | # input type to the specified output type. If no output type was
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| 156 | # given, then they first attempt HTML, and then TEXT.
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| 157 | #
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| 158 | # Each returns the output type ("html" or "text") or "fail" if no
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| 159 | # conversion is possible.
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| 160 |
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| 161 | # Convert a Microsoft word document
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| 162 |
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| 163 | sub convertDOC {
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| 164 | ($input_filename, $output_filestem, $output_type) = @_;
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| 165 |
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[1654] | 166 | # Many .doc files are not in fact word documents!
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| 167 | my $realtype = &find_docfile_type($input_filename);
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| 168 |
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[1734] | 169 | if ($realtype eq "word6" || $realtype eq "word7" || $realtype eq "word8") {
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[1654] | 170 | return &convertWord678($input_filename, $output_filestem, $output_type);
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| 171 | } elsif ($realtype eq "rtf") {
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| 172 | return &convertRTF($input_filename, $output_filestem, $output_type);
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| 173 | } else {
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| 174 | return &convertAnything($input_filename, $output_filestem, $output_type);
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | # Convert a Microsoft word 6/7/8 document
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| 179 |
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| 180 | sub convertWord678 {
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| 181 | ($input_filename, $output_filestem, $output_type) = @_;
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| 182 |
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[1445] | 183 | my $success = 0;
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| 184 |
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| 185 | # Attempt specialised conversion to HTML
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| 186 | if (!$output_type || ($output_type =~ /html/i)) {
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| 187 | $success = &doc_to_html($input_filename, $output_filestem);
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| 188 | if ($success) {
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| 189 | return "html";
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| 190 | }
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| 191 | }
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| 192 |
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[1654] | 193 | return &convertAnything($input_filename, $output_filestem, $output_type);
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| 194 | }
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| 195 |
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| 196 |
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| 197 | # Convert a Rich Text Format (RTF) file
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| 198 |
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| 199 | sub convertRTF {
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| 200 | ($input_filename, $output_filestem, $output_type) = @_;
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| 201 |
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| 202 | my $success = 0;
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| 203 |
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| 204 | # Attempt specialised conversion to HTML
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| 205 | if (!$output_type || ($output_type =~ /html/i)) {
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| 206 | $success = &rtf_to_html($input_filename, $output_filestem);
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| 207 | if ($success) {
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| 208 | return "html";
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| 209 | }
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| 210 | }
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| 211 |
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[2755] | 212 | # rtf is so ugly that's it's not worth running strings over.
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| 213 | # One day I'll write some quick'n'dirty regexps to try to extract text - jrm21
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| 214 | # return &convertAnything($input_filename, $output_filestem, $output_type);
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| 215 | return "fail";
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[1654] | 216 | }
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| 217 |
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| 218 |
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| 219 | # Convert an unidentified file
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| 220 |
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| 221 | sub convertAnything {
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| 222 | ($input_filename, $output_filestem, $output_type) = @_;
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| 223 |
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| 224 | my $success = 0;
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| 225 |
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[1445] | 226 | # Attempt simple conversion to HTML
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| 227 | if (!$output_type || ($output_type =~ /html/i)) {
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| 228 | $success = &any_to_html($input_filename, $output_filestem);
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| 229 | if ($success) {
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| 230 | return "html";
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| 231 | }
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| 232 | }
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| 233 |
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| 234 | # Convert to text
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| 235 | if (!$output_type || ($output_type =~ /text/i)) {
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[2241] | 236 | $success = &any_to_text($input_filename, $output_filestem);
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[1445] | 237 | if ($success) {
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| 238 | return "text";
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| 239 | }
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| 240 | }
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| 241 | return "fail";
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| 242 | }
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| 243 |
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| 244 |
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[1654] | 245 |
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[1445] | 246 | # Convert an Adobe PDF document
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| 247 |
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| 248 | sub convertPDF {
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[2755] | 249 | my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
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[1445] | 250 |
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| 251 | my $success = 0;
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| 252 |
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| 253 | # Attempt conversion to HTML
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| 254 | if (!$output_type || ($output_type =~ /html/i)) {
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| 255 | $success = &pdf_to_html($dirname, $input_filename, $output_filestem);
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| 256 | if ($success) {
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| 257 | return "html";
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| 258 | }
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| 259 | }
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| 260 |
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| 261 | # Attempt conversion to TEXT
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| 262 | if (!$output_type || ($output_type =~ /text/i)) {
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[2117] | 263 | $success = &pdf_to_text($dirname, $input_filename, $output_filestem);
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[1445] | 264 | if ($success) {
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| 265 | return "text";
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| 266 | }
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| 267 | }
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| 268 |
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| 269 | return "fail";
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| 270 |
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| 271 | }
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| 272 |
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| 273 |
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| 274 | # Convert an Adobe PostScript document
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| 275 |
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| 276 | sub convertPS {
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| 277 | ($input_filename, $output_filestem, $output_type) = @_;
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| 278 |
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| 279 | my $success = 0;
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| 280 |
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| 281 | # Attempt conversion to TEXT
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| 282 | if (!$output_type || ($output_type =~ /text/i)) {
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| 283 | $success = &ps_to_text($input_filename, $output_filestem);
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| 284 | if ($success) {
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| 285 | return "text";
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| 286 | }
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| 287 | }
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| 288 |
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| 289 | return "fail";
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| 290 |
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| 291 | }
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| 292 |
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| 293 |
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[2977] | 294 | sub convertPPT {
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| 295 | my ($input_filename, $output_filestem, $output_type) = @_;
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| 296 |
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| 297 | my $success = 0;
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| 298 |
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| 299 | # Attempt conversion to HTML
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| 300 | if (!$output_type || ($output_type =~ /html/i)) {
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| 301 | # formulate the command
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| 302 | $cmd = "";
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| 303 | $cmd .= "perl -S ppttohtml.pl ";
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| 304 | $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
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| 305 | $cmd .= " 2>\"$output_filestem.err\""
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| 306 | if ($ENV{'GSDLOS'} !~ /^windows$/i || $is_winnt_2000);
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| 307 |
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| 308 |
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| 309 | # execute the command
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| 310 | $!=0;
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| 311 | if (system($cmd)!=0)
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| 312 | {
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| 313 | print STDERR "Powerpoint converter failed $!\n";
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| 314 | } else {
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| 315 | return "html";
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| 316 | }
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| 317 | }
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| 318 |
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| 319 | $success = &any_to_text($input_filename, $output_filestem);
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| 320 | if ($success) {
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| 321 | return "text";
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| 322 | }
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| 323 |
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| 324 | return "fail";
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| 325 | }
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| 326 |
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| 327 |
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| 328 |
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| 329 |
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| 330 |
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[1654] | 331 | # Find the real type of a .doc file
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| 332 | #
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[2012] | 333 | # We seem to have a lot of files with a .doc extension that are .rtf
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[1654] | 334 | # files or Word 5 files. This function attempts to tell the difference.
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[1445] | 335 |
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[1654] | 336 | sub find_docfile_type {
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| 337 | ($input_filename) = @_;
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| 338 |
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| 339 | open(CHK, "<$input_filename");
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[1734] | 340 | binmode(CHK);
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[1654] | 341 | my $line = "";
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| 342 | my $first = 1;
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| 343 |
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| 344 | while (<CHK>) {
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| 345 |
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| 346 | $line = $_;
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[1960] | 347 |
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[1654] | 348 | if ($first) {
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| 349 | # check to see if this is an rtf file
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| 350 | if ($line =~ /^\{\\rtf/) {
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| 351 | close(CHK);
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| 352 | return "rtf";
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| 353 | }
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[2755] | 354 | $first = 0;
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[1654] | 355 | }
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| 356 |
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[1734] | 357 | # is this is a word 6/7/8 document?
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| 358 | if ($line =~ /Word\.Document\.([678])/) {
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[1654] | 359 | close(CHK);
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[1734] | 360 | return "word$1";
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[1654] | 361 | }
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| 362 |
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| 363 | }
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| 364 |
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| 365 | return "unknown";
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| 366 | }
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| 367 |
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| 368 |
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| 369 |
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[1734] | 370 | # Specific type-to-type conversions
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[1445] | 371 | #
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| 372 | # Each of the following functions attempts to convert a document from
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[2755] | 373 | # a specific format to another. If they succeed they return 1 and leave
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[1445] | 374 | # the output document(s) in the appropriate place; if they fail they
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| 375 | # return 0 and delete any working files.
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| 376 |
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| 377 |
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| 378 | # Attempt to convert a word document to html with the wv program
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| 379 |
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| 380 | sub doc_to_html {
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| 381 | ($input_filename, $output_filestem) = @_;
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| 382 |
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[2023] | 383 | my $wvWare = &util::filename_cat($ENV{'GSDLHOME'}, "bin",
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| 384 | $ENV{'GSDLOS'}, "wvWare");
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[1928] | 385 |
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[2241] | 386 | # don't include path on windows (to avoid having to play about
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| 387 | # with quoting when GSDLHOME might contain spaces) but assume
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| 388 | # that the PATH is set up correctly
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| 389 | $wvWare = "wvWare" if ($ENV{'GSDLOS'} =~ /^windows$/i);
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| 390 |
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[2512] | 391 | my $wv_conf = &util::filename_cat($ENV{'GSDLHOME'}, "etc",
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[2574] | 392 | "packages", "wv", "wvHtml.xml");
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[1928] | 393 |
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[2241] | 394 | my $cmd = "";
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[1692] | 395 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
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[2241] | 396 | $cmd .= "$wvWare --charset utf-8 --config \"$wv_conf\"";
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| 397 | $cmd .= " \"$input_filename\" > \"$output_filestem.html\"";
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| 398 |
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| 399 | # redirecting STDERR is a bad idea on windows 95/98
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| 400 | $cmd .= " 2> \"$output_filestem.err\""
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[2755] | 401 | if ($ENV{'GSDLOS'} !~ /^windows$/i || $is_winnt_2000);
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[1654] | 402 |
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[1445] | 403 | # execute the command
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[2755] | 404 | $!=0;
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[2060] | 405 | if (system($cmd)!=0)
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[1445] | 406 | {
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[2755] | 407 | print STDERR "Error executing wv converter:$!\n";
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| 408 | if (-s "$output_filestem.err") {
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| 409 | open (ERRFILE, "<$output_filestem.err");
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| 410 |
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| 411 | my $write_to_fail_log=0;
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| 412 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
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| 413 | {$write_to_fail_log=1;}
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| 414 |
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| 415 | my $line;
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| 416 | while ($line=<ERRFILE>) {
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| 417 | if ($line =~ /\w/) {
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| 418 | print STDERR "$line";
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| 419 | print FAILLOG "$line" if ($write_to_fail_log);
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| 420 | }
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| 421 | if ($line !~ m/startup error/) {next;}
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| 422 | print STDERR " (given an invalid .DOC file?)\n";
|
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| 423 | print FAILLOG " (given an invalid .DOC file?)\n"
|
---|
| 424 | if ($write_to_fail_log);
|
---|
| 425 |
|
---|
| 426 | } # while ERRFILE
|
---|
| 427 | close FAILLOG if ($write_to_fail_log);
|
---|
| 428 | }
|
---|
| 429 | print STDERR "Continuing...\n";
|
---|
| 430 | return 0; # we can try any_to_text
|
---|
[1445] | 431 | }
|
---|
[1578] | 432 |
|
---|
[1445] | 433 | # Was the conversion successful?
|
---|
[2241] | 434 |
|
---|
[2656] | 435 | if (-s "$output_filestem.html") {
|
---|
[1445] | 436 | open(TMP, "$output_filestem.html");
|
---|
| 437 | $line = <TMP>;
|
---|
| 438 | close(TMP);
|
---|
[1578] | 439 | if ($line && $line =~ /DOCTYPE HTML/) {
|
---|
[2241] | 440 | &util::rm("$output_filestem.err") if -e "$output_filestem.err";
|
---|
[1445] | 441 | return 1;
|
---|
| 442 | }
|
---|
| 443 | }
|
---|
[2755] | 444 |
|
---|
| 445 | # If here, an error of some sort occurred
|
---|
| 446 | &util::rm("$output_filestem.html") if -e "$output_filestem.html";
|
---|
| 447 | if (-e "$output_filestem.err") {
|
---|
| 448 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile"))) {
|
---|
| 449 | open (ERRLOG,"$output_filestem.err");
|
---|
| 450 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
| 451 | close FAILLOG;
|
---|
| 452 | close ERRLOG;
|
---|
| 453 | }
|
---|
| 454 | &util::rm("$output_filestem.err");
|
---|
| 455 | }
|
---|
| 456 |
|
---|
[1445] | 457 | return 0;
|
---|
| 458 | }
|
---|
| 459 |
|
---|
| 460 |
|
---|
[1654] | 461 | # Attempt to convert an RTF document to html with rtftohtml
|
---|
| 462 |
|
---|
| 463 | sub rtf_to_html {
|
---|
[2241] | 464 | my ($input_filename, $output_filestem) = @_;
|
---|
[1654] | 465 |
|
---|
| 466 | # formulate the command
|
---|
[1692] | 467 | $cmd = "";
|
---|
| 468 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
[2574] | 469 | $cmd .= "rtftohtml";
|
---|
[1654] | 470 |
|
---|
[2574] | 471 | # it automatically uses $output_filestem.html
|
---|
| 472 | $cmd .= " \"$input_filename\"";
|
---|
| 473 |
|
---|
| 474 | $cmd .= " 2>\"$output_filestem.err\""
|
---|
[2755] | 475 | if ($ENV{'GSDLOS'} !~ /^windows$/i || $is_winnt_2000);
|
---|
[2574] | 476 |
|
---|
| 477 |
|
---|
[1654] | 478 | # execute the command
|
---|
[2755] | 479 | $!=0;
|
---|
[2060] | 480 | if (system($cmd)!=0)
|
---|
[1654] | 481 | {
|
---|
[2755] | 482 | print STDERR "Error executing rtf converter $!\n";
|
---|
[2656] | 483 | # don't currently bother printing out error log...
|
---|
| 484 | # keep going, in case it still created an HTML file...
|
---|
[1654] | 485 | }
|
---|
| 486 |
|
---|
| 487 | # Was the conversion successful?
|
---|
[2755] | 488 | my $was_successful=0;
|
---|
[2656] | 489 | if (-s "$output_filestem.html") {
|
---|
[2755] | 490 | # make sure we have some content other than header
|
---|
| 491 | open (HTML, "$output_filestem.html"); # what to do if fail?
|
---|
| 492 | my $line;
|
---|
| 493 | my $past_header=0;
|
---|
| 494 | while ($line=<HTML>) {
|
---|
| 495 |
|
---|
| 496 | if ($past_header == 0) {
|
---|
| 497 | if ($line =~ /<body>/) {$past_header=1;}
|
---|
| 498 | next;
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | $line =~ s/<[^>]+>//g;
|
---|
| 502 | if ($line =~ /\w/ && $past_header) { # we found some content...
|
---|
| 503 | $was_successful=1;
|
---|
| 504 | last;
|
---|
| 505 | }
|
---|
| 506 | }
|
---|
| 507 | close HTML;
|
---|
[1654] | 508 | }
|
---|
[2574] | 509 |
|
---|
[2755] | 510 | if ($was_successful) {
|
---|
| 511 | &util::rm("$output_filestem.err")
|
---|
| 512 | if (-e "$output_filestem.err");
|
---|
| 513 | # insert the (modified) table of contents, if it exists.
|
---|
| 514 | if (-e "${output_filestem}_ToC.html") {
|
---|
| 515 | &util::mv("$output_filestem.html","$output_filestem.src");
|
---|
| 516 | my $open_failed=0;
|
---|
| 517 | open HTMLSRC, "$output_filestem.src" || ++$open_failed;
|
---|
| 518 | open TOC, "${output_filestem}_ToC.html" || ++$open_failed;
|
---|
| 519 | open HTML, ">$output_filestem.html" || ++$open_failed;
|
---|
| 520 |
|
---|
| 521 | if ($open_failed) {
|
---|
| 522 | close HTMLSRC;
|
---|
| 523 | close TOC;
|
---|
| 524 | close HTML;
|
---|
| 525 | &util::mv("$output_filestem.src","$output_filestem.html");
|
---|
| 526 | return 1;
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | # print out header info from src html.
|
---|
| 530 | while (($_ = <HTMLSRC>) =~ /\w/) {
|
---|
| 531 | print HTML "$_";
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | # print out table of contents, making links relative
|
---|
| 535 | <TOC>; <TOC>; # ignore first 2 lines
|
---|
| 536 | print HTML scalar(<TOC>); # line 3 = "<ol>\n"
|
---|
| 537 | my $line;
|
---|
| 538 | while ($line=<TOC>) {
|
---|
| 539 | $line =~ s@</body></html>$@@ ; # only last line has this
|
---|
| 540 | # make link relative
|
---|
| 541 | $line =~ s@href=\"[^\#]+@href=\"@;
|
---|
| 542 | print HTML $line;
|
---|
| 543 | }
|
---|
| 544 | close TOC;
|
---|
| 545 |
|
---|
| 546 | # rest of html src
|
---|
| 547 | while (<HTMLSRC>) {
|
---|
| 548 | print HTML $_;
|
---|
| 549 | }
|
---|
| 550 | close HTMLSRC;
|
---|
| 551 | close HTML;
|
---|
| 552 |
|
---|
| 553 | &util::rm("${output_filestem}_ToC.html");
|
---|
| 554 | &util::rm("${output_filestem}.src");
|
---|
| 555 | }
|
---|
| 556 | # we don't yet do anything with footnotes ($output_filestem_fn.html) :(
|
---|
| 557 | return 1; # success
|
---|
| 558 | }
|
---|
| 559 |
|
---|
| 560 | if (-e "$output_filestem.err") {
|
---|
| 561 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
| 562 | {
|
---|
| 563 | print FAILLOG "Error - rtftohtml - couldn't extract text\n";
|
---|
| 564 | print FAILLOG " (rtf file might be too recent):\n";
|
---|
| 565 | open (ERRLOG, "$output_filestem.err");
|
---|
| 566 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
| 567 | close ERRLOG;
|
---|
| 568 | close FAILLOG;
|
---|
| 569 | }
|
---|
| 570 | &util::rm("$output_filestem.err");
|
---|
| 571 | }
|
---|
| 572 |
|
---|
[2656] | 573 | &util::rm("$output_filestem.html") if (-e "$output_filestem.html");
|
---|
| 574 |
|
---|
[1654] | 575 | return 0;
|
---|
| 576 | }
|
---|
| 577 |
|
---|
| 578 |
|
---|
[1445] | 579 | # Convert a pdf file to html with the pdftohtml command
|
---|
| 580 |
|
---|
| 581 | sub pdf_to_html {
|
---|
[2755] | 582 | my ($dirname, $input_filename, $output_filestem) = @_;
|
---|
[1445] | 583 |
|
---|
[1692] | 584 | $cmd = "";
|
---|
| 585 | if ($timeout) {$cmd = "ulimit -t $timeout;";}
|
---|
[2755] | 586 | $cmd .= "perl -S pdftohtml.pl ";
|
---|
[1928] | 587 | $cmd .= " \"$input_filename\" \"$output_filestem\"";
|
---|
[2755] | 588 |
|
---|
| 589 | if ($ENV{'GSDLOS'} !~ /^windows$/i || $is_winnt_2000) {
|
---|
| 590 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
| 591 | } else {
|
---|
| 592 | $cmd .= " > \"$output_filestem.err\"";
|
---|
| 593 | }
|
---|
| 594 |
|
---|
[2117] | 595 | $!=0;
|
---|
[2241] | 596 |
|
---|
[2656] | 597 | my $retval=system($cmd);
|
---|
| 598 | if ($retval!=0)
|
---|
[1445] | 599 | {
|
---|
[2755] | 600 | print STDERR "Error executing pdftohtml.pl";
|
---|
[2117] | 601 | if ($!) {print STDERR ": $!";}
|
---|
| 602 | print STDERR "\n";
|
---|
[1445] | 603 | }
|
---|
| 604 |
|
---|
[1692] | 605 | # make sure the converter made something
|
---|
[2656] | 606 | if ($retval!=0 || ! -s "$output_filestem.html")
|
---|
[1692] | 607 | {
|
---|
| 608 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
[2656] | 609 | # print out the converter's std err, if any
|
---|
| 610 | if (-s "$output_filestem.err") {
|
---|
[1692] | 611 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
[2755] | 612 | print STDERR "pdftohtml error log:\n";
|
---|
[1692] | 613 | while (<ERRLOG>) {
|
---|
| 614 | print STDERR "$_";
|
---|
| 615 | }
|
---|
| 616 | close ERRLOG;
|
---|
| 617 | }
|
---|
[2656] | 618 | &util::rm("$output_filestem.html") if (-e "$output_filestem.html");
|
---|
[2755] | 619 | if (-e "$output_filestem.err") {
|
---|
| 620 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
| 621 | {
|
---|
| 622 | open (ERRLOG, "$output_filestem.err");
|
---|
| 623 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
| 624 | close ERRLOG;
|
---|
| 625 | close FAILLOG;
|
---|
| 626 | }
|
---|
| 627 | &util::rm("$output_filestem.err");
|
---|
| 628 | }
|
---|
[1692] | 629 | return 0;
|
---|
| 630 | }
|
---|
| 631 |
|
---|
[2656] | 632 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
[1445] | 633 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
| 634 | return 1;
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | # Convert a PDF file to text with the pdftotext command
|
---|
| 638 |
|
---|
| 639 | sub pdf_to_text {
|
---|
[2755] | 640 | my ($dirname, $input_filename, $output_filestem) = @_;
|
---|
[1445] | 641 |
|
---|
[2248] | 642 | my $cmd = "pdftotext \"$input_filename\" \"$output_filestem.text\"";
|
---|
[2755] | 643 |
|
---|
| 644 | if ($ENV{'GSDLOS'} !~ /^windows$/i) {
|
---|
| 645 | $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
|
---|
| 646 | } else {
|
---|
| 647 | $cmd .= " > \"$output_filestem.err\"";
|
---|
| 648 | }
|
---|
[1445] | 649 |
|
---|
[2060] | 650 | if (system($cmd)!=0)
|
---|
[1445] | 651 | {
|
---|
| 652 | print STDERR "Error executing $cmd: $!\n";
|
---|
| 653 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
| 654 | }
|
---|
| 655 |
|
---|
[2755] | 656 | # make sure there is some extracted text.
|
---|
| 657 | if (-e "$output_filestem.text") {
|
---|
| 658 | open (EXTR_TEXT, "$output_filestem.text") || warn "open: $!";
|
---|
| 659 | binmode(EXTR_TEXT); # just in case...
|
---|
| 660 | my $line="";
|
---|
| 661 | my $seen_text=0;
|
---|
| 662 | while (($seen_text==0) && ($line=<EXTR_TEXT>)) {
|
---|
| 663 | if ($line=~ /\w/) {$seen_text=1;}
|
---|
| 664 | }
|
---|
| 665 | close EXTR_TEXT;
|
---|
| 666 | if ($seen_text==0) { # no text was extracted
|
---|
| 667 | print STDERR "Error: pdftotext found no text\n";
|
---|
| 668 | &util::rm("$output_filestem.text");
|
---|
| 669 | }
|
---|
| 670 | }
|
---|
| 671 |
|
---|
[1692] | 672 | # make sure the converter made something
|
---|
[2656] | 673 | if (! -s "$output_filestem.text")
|
---|
[1692] | 674 | {
|
---|
| 675 | # print out the converters std err, if any
|
---|
[2656] | 676 | if (-s "$output_filestem.err") {
|
---|
[1692] | 677 | open (ERRLOG, "$output_filestem.err") || die "$!";
|
---|
[2755] | 678 | print STDERR "pdftotext error log:\n";
|
---|
[1692] | 679 | while (<ERRLOG>) {
|
---|
| 680 | print STDERR "$_";
|
---|
| 681 | }
|
---|
| 682 | close ERRLOG;
|
---|
| 683 | }
|
---|
[2656] | 684 | # does this converter create a .out file?
|
---|
| 685 | &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
|
---|
| 686 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
[2755] | 687 | if (-e "$output_filestem.err") {
|
---|
| 688 | if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
|
---|
| 689 | {
|
---|
| 690 | open (ERRLOG,"$output_filestem.err");
|
---|
| 691 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
| 692 | close ERRLOG;
|
---|
| 693 | close FAILLOG;
|
---|
| 694 | }
|
---|
| 695 | &util::rm("$output_filestem.err");
|
---|
| 696 | }
|
---|
[1692] | 697 | return 0;
|
---|
| 698 | }
|
---|
[1445] | 699 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
| 700 | return 1;
|
---|
| 701 | }
|
---|
| 702 |
|
---|
[2012] | 703 | # Convert a PostScript document to text
|
---|
| 704 | # note - just using "ps2ascii" isn't good enough, as it
|
---|
| 705 | # returns 0 for a postscript interpreter error. ps2ascii is just
|
---|
| 706 | # a wrapper to "gs" anyway, so we use that cmd here.
|
---|
[1445] | 707 |
|
---|
| 708 | sub ps_to_text {
|
---|
[2241] | 709 | my ($input_filename, $output_filestem) = @_;
|
---|
[1445] | 710 |
|
---|
[2241] | 711 | my $error = "";
|
---|
| 712 |
|
---|
| 713 | # if we're on windows we'll fall straight through without attempting
|
---|
| 714 | # to use gs
|
---|
| 715 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
|
---|
| 716 | $error = "Windows does not support gs";
|
---|
| 717 |
|
---|
| 718 | } else {
|
---|
| 719 | my $cmd = "gs -q -dNODISPLAY -dNOBIND -dWRITESYSTEMDICT -dSIMPLE -c save ";
|
---|
| 720 | $cmd .= "-f ps2ascii.ps \"$input_filename\" -c quit > \"$output_filestem.text\"";
|
---|
| 721 | $cmd .= " 2> $output_filestem.err";
|
---|
| 722 | $!=0;
|
---|
[2600] | 723 |
|
---|
[2241] | 724 | my $retcode=system($cmd);
|
---|
| 725 | $retcode = $? >> 8; # see man perlfunc - system for this...
|
---|
| 726 | # if system returns -1 | 127 (couldn't start program), look at $! for message
|
---|
| 727 |
|
---|
| 728 | if ($retcode!=0) {if ($!) {$error=$!;} else {$error="couldn't run.\n";}}
|
---|
| 729 | elsif (! -e "$output_filestem.text") {
|
---|
| 730 | $error="did not create output file.\n";
|
---|
[2012] | 731 | }
|
---|
[2241] | 732 | else
|
---|
| 733 | { # make sure the interpreter didn't get an error. It is technically
|
---|
| 734 | # possible for the actual text to start with this, but....
|
---|
| 735 | open PSOUT, "$output_filestem.text";
|
---|
| 736 | if (<PSOUT> =~ /^Error: (.*)/) {
|
---|
| 737 | $error="interpreter error - \"$1\"";
|
---|
| 738 | }
|
---|
| 739 | close PSOUT;
|
---|
| 740 | }
|
---|
[2012] | 741 | }
|
---|
[2241] | 742 |
|
---|
[2012] | 743 | if ($error ne "")
|
---|
[1445] | 744 | {
|
---|
[2755] | 745 | print STDERR "Warning: Error executing gs: $error\n";
|
---|
[1445] | 746 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
[2755] | 747 |
|
---|
| 748 | if ("$faillogfile" ne "" && defined(open (FAILLOG, ">>$faillogfile")))
|
---|
| 749 | {
|
---|
| 750 | print FAILLOG "gs - $error\n";
|
---|
| 751 | if (-e "$output_filestem.err") {
|
---|
| 752 | open(ERRLOG, "$output_filestem.err");
|
---|
| 753 | while (<ERRLOG>) {print FAILLOG $_;}
|
---|
| 754 | close ERRLOG;
|
---|
| 755 | }
|
---|
| 756 | close FAILLOG;
|
---|
| 757 | }
|
---|
[1445] | 758 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
[2012] | 759 |
|
---|
[2755] | 760 |
|
---|
[2012] | 761 | # Fine then. We'll just do a lousy job by ourselves...
|
---|
[2031] | 762 | # Based on 5-line regexp sed script found at:
|
---|
[2012] | 763 | # http://snark.ptc.spbu.ru/mail-archives/lout/brown/msg00003.html
|
---|
| 764 | #
|
---|
[2755] | 765 | print STDERR "Stripping text from postscript\n";
|
---|
[2012] | 766 | my $errorcode=0;
|
---|
| 767 | open (IN, "$input_filename")
|
---|
| 768 | || ($errorcode=1, warn "Couldn't read file: $!");
|
---|
| 769 | open (OUT, ">$output_filestem.text")
|
---|
| 770 | || ($errorcode=1, warn "Couldn't write file: $!");
|
---|
| 771 | if ($errorcode) {print STDERR "errors\n";return 0;}
|
---|
| 772 |
|
---|
[2031] | 773 | my $text=""; # this is for whole .ps file...
|
---|
[2755] | 774 | $text = join('', <IN>); # see man perlport, under "System Resources"
|
---|
[2031] | 775 | close IN;
|
---|
| 776 |
|
---|
[2447] | 777 | # Make sure this is a ps file...
|
---|
| 778 | if ($text !~ /^%!/) {
|
---|
[2755] | 779 | print STDERR "Bad postscript header: not '%!'\n";
|
---|
| 780 | if ($faillogfile ne "" && defined(open(FAILLOG, ">>$faillogfile")))
|
---|
| 781 | {
|
---|
| 782 | print FAILLOG "Bad postscript header: not '%!'\n";
|
---|
| 783 | close FAILLOG;
|
---|
| 784 | }
|
---|
[2447] | 785 | return 0;
|
---|
| 786 | }
|
---|
| 787 |
|
---|
[2031] | 788 | # if ps has Page data, then use it to delete all stuff before it.
|
---|
| 789 | $text =~ s/^.*?%%Page:.*?\n//s; # treat string as single line
|
---|
| 790 |
|
---|
| 791 | # remove all leading non-data stuff
|
---|
| 792 | $text =~ s/^.*?\(//s;
|
---|
| 793 |
|
---|
| 794 | # remove all newline chars for easier processing
|
---|
| 795 | $text =~ s/\n//g;
|
---|
| 796 |
|
---|
| 797 | # Big assumption here - assume that if any co-ordinates are
|
---|
| 798 | # given, then we are at the end of a sentence.
|
---|
| 799 | $text =~ s/\)-?\d+\ -?\d+/\) \(\n\)/g;
|
---|
| 800 |
|
---|
| 801 | # special characters--
|
---|
| 802 | $text =~ s/\(\|\)/\(\ - \)/g; # j -> em-dash?
|
---|
| 803 |
|
---|
| 804 | # ? ps text formatting (eg italics?) ?
|
---|
| 805 | $text =~ s/Fn\(f\)/\(\{\)/g; # f -> {
|
---|
| 806 | $text =~ s/Fn\(g\)/\(\}\)/g; # g -> }
|
---|
| 807 | $text =~ s/Fn\(j\)/\(\|\)/g; # j -> |
|
---|
| 808 | # default - remove the rest
|
---|
| 809 | $text =~ s/\ ?F.\((.+?)\)/\($1\)/g;
|
---|
| 810 |
|
---|
| 811 | # attempt to add whitespace between words...
|
---|
| 812 | # this is based purely on observation, and may be completely wrong...
|
---|
| 813 | $text =~ s/([^F])[defghijkuy]\(/$1 \( /g;
|
---|
| 814 | # eg I notice "b(" is sometimes NOT a space if preceded by a
|
---|
| 815 | # negative number.
|
---|
| 816 | $text =~ s/\)\d+ ?b\(/\) \( /g;
|
---|
| 817 |
|
---|
| 818 | # change quoted braces to brackets
|
---|
| 819 | $text =~ s/([^\\])\\\(/$1\{/g;
|
---|
| 820 | $text =~ s/([^\\])\\\)/$1\}/g ;
|
---|
| 821 |
|
---|
| 822 | # remove everything that is not between braces
|
---|
| 823 | $text =~ s/\)([^\(\)])+?\(//sg ;
|
---|
| 824 |
|
---|
| 825 | # remove any Trailer eof stuff.
|
---|
| 826 | $text =~ s/\)[^\)]*$//sg;
|
---|
| 827 |
|
---|
| 828 | ### ligatures have special characters...
|
---|
| 829 | $text =~ s/\\013/ff/g;
|
---|
| 830 | $text =~ s/\\014/fi/g;
|
---|
| 831 | $text =~ s/\\015/fl/g;
|
---|
| 832 | $text =~ s/\\016/ffi/g;
|
---|
| 833 | $text =~ s/\\214/fi/g;
|
---|
| 834 | $text =~ s/\\215/fl/g;
|
---|
| 835 | $text =~ s/\\017/\n\* /g; # asterisk?
|
---|
| 836 | $text =~ s/\\023/\023/g; # e acute ('e)
|
---|
| 837 | $text =~ s/\\177/\252/g; # u"
|
---|
| 838 | # $text =~ s/ ?? /\344/g; # a"
|
---|
| 839 |
|
---|
| 840 | print OUT "$text";
|
---|
| 841 | close OUT;
|
---|
[1960] | 842 | }
|
---|
[2600] | 843 | # wrap the text - use a minimum length. ie, first space after this length.
|
---|
| 844 | my $wrap_length=72;
|
---|
| 845 | &util::mv("$output_filestem.text", "$output_filestem.text.tmp");
|
---|
| 846 | open INFILE, "$output_filestem.text.tmp" ||
|
---|
| 847 | die "Couldn't open file: $!";
|
---|
| 848 | open OUTFILE, ">$output_filestem.text" ||
|
---|
| 849 | die "Couldn't open file for writing: $!";
|
---|
| 850 | my $line="";
|
---|
| 851 | while ($line=<INFILE>) {
|
---|
| 852 | while (length($line)>0) {
|
---|
| 853 | if (length($line)>$wrap_length) {
|
---|
| 854 | $line =~ s/^(.{$wrap_length}[^\s]*)\s*//;
|
---|
| 855 | print OUTFILE "$1\n";
|
---|
| 856 | } else {
|
---|
| 857 | print OUTFILE "$line";
|
---|
| 858 | $line="";
|
---|
| 859 | }
|
---|
| 860 | }
|
---|
| 861 | }
|
---|
| 862 | close INFILE;
|
---|
| 863 | close OUTFILE;
|
---|
| 864 | &util::rm("$output_filestem.text.tmp");
|
---|
| 865 |
|
---|
[1445] | 866 | &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
|
---|
| 867 | return 1;
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 |
|
---|
| 871 | # Convert any file to HTML with a crude perl implementation of the
|
---|
| 872 | # UNIX strings command.
|
---|
| 873 |
|
---|
| 874 | sub any_to_html {
|
---|
| 875 | ($input_filename, $output_filestem) = @_;
|
---|
| 876 |
|
---|
| 877 | # First generate a text file
|
---|
| 878 | return 0 unless (&any_to_text($input_filename, $output_filestem));
|
---|
| 879 |
|
---|
| 880 | # create an HTML file from the text file
|
---|
| 881 | open(TEXT, "<$output_filestem.text");
|
---|
| 882 | open(HTML, ">$output_filestem.html");
|
---|
| 883 |
|
---|
[2241] | 884 | print HTML "<html><head>\n";
|
---|
| 885 | print HTML "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html\">\n";
|
---|
| 886 | print HTML "<META NAME=\"GENERATOR\" CONTENT=\"Greenstone any_to_html\">\n";
|
---|
| 887 | print HTML "</head><body>\n\n";
|
---|
[1734] | 888 |
|
---|
[2755] | 889 | my $line;
|
---|
| 890 | while ($line=<TEXT>) {
|
---|
| 891 | $line =~ s/</</g;
|
---|
| 892 | $line =~ s/>/>/g;
|
---|
| 893 | if ($line =~ /^\s*$/) {
|
---|
| 894 | print HTML "<p>";
|
---|
| 895 | } else {
|
---|
| 896 | print HTML "<br> ", $line;
|
---|
| 897 | }
|
---|
[1445] | 898 | }
|
---|
[1734] | 899 | print HTML "\n</body></html>\n";
|
---|
[1445] | 900 |
|
---|
[2241] | 901 | close HTML;
|
---|
| 902 | close TEXT;
|
---|
| 903 |
|
---|
[1445] | 904 | &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
|
---|
| 905 | return 1;
|
---|
| 906 | }
|
---|
| 907 |
|
---|
| 908 | # Convert any file to TEXT with a crude perl implementation of the
|
---|
| 909 | # UNIX strings command.
|
---|
[2755] | 910 | # Note - this assumes ascii charsets :( (jrm21)
|
---|
[1445] | 911 |
|
---|
| 912 | sub any_to_text {
|
---|
| 913 | ($input_filename, $output_filestem) = @_;
|
---|
| 914 |
|
---|
[2755] | 915 | open(IN, "<$input_filename") || return 0;
|
---|
[1734] | 916 | binmode(IN);
|
---|
[2755] | 917 | open(OUT, ">$output_filestem.text") || return 0;
|
---|
[1445] | 918 |
|
---|
| 919 | my ($line);
|
---|
[2755] | 920 | my $output_line_count = 0;
|
---|
[1445] | 921 | while (<IN>) {
|
---|
| 922 | $line = $_;
|
---|
[1734] | 923 |
|
---|
[1445] | 924 | # delete anything that isn't a printable character
|
---|
| 925 | $line =~ s/[^\040-\176]+/\n/sg;
|
---|
| 926 |
|
---|
| 927 | # delete any string less than 10 characters long
|
---|
[1734] | 928 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
| 929 | while ($line =~ /^.{1,9}$/m) {
|
---|
| 930 | $line =~ s/^.{0,9}$/\n/mg;
|
---|
[1445] | 931 | $line =~ s/\n+/\n/sg;
|
---|
| 932 | }
|
---|
| 933 |
|
---|
| 934 | # remove extraneous whitespace
|
---|
| 935 | $line =~ s/\n+/\n/gs;
|
---|
| 936 | $line =~ s/^\n//gs;
|
---|
[1578] | 937 |
|
---|
[1445] | 938 | # output whatever is left
|
---|
[1578] | 939 | if ($line =~ /[^\n ]/) {
|
---|
[1445] | 940 | print OUT $line;
|
---|
[2755] | 941 | ++$output_line_count;
|
---|
[1445] | 942 | }
|
---|
| 943 | }
|
---|
[2241] | 944 |
|
---|
| 945 | close OUT;
|
---|
| 946 | close IN;
|
---|
| 947 |
|
---|
[2755] | 948 | if ($output_line_count) { # try to protect against binary only formats
|
---|
| 949 | return 1;
|
---|
| 950 | }
|
---|
| 951 |
|
---|
| 952 | &util::rm("$output_filestem.text");
|
---|
| 953 | return 0;
|
---|
| 954 |
|
---|
[1445] | 955 | }
|
---|