source: gsdl/trunk/bin/script/gsConvert.pl@ 18202

Last change on this file since 18202 was 18202, checked in by ak19, 15 years ago

Gone back to replaces %20s with space again, to work in tandem with unicode::url_decode preserving spaces.
  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
File size: 43.8 KB
Line 
1#!/usr/bin/perl -w
2
3###########################################################################
4#
5# gsConvert.pl -- convert documents to HTML or TEXT format
6#
7# A component of the Greenstone digital library software
8# from the New Zealand Digital Library Project at the
9# University of Waikato, New Zealand.
10#
11# Copyright (C) 1999-2002 New Zealand Digital Library Project
12#
13# This program is free software; you can redistribute it and/or modify
14# it under the terms of the GNU General Public License as published by
15# the Free Software Foundation; either version 2 of the License, or
16# (at your option) any later version.
17#
18# This program is distributed in the hope that it will be useful,
19# but WITHOUT ANY WARRANTY; without even the implied warranty of
20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21# GNU General Public License for more details.
22#
23# You should have received a copy of the GNU General Public License
24# along with this program; if not, write to the Free Software
25# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26#
27###########################################################################
28
29# gsConvert.pl converts documents in a range of formats to HTML or TEXT
30# by exploiting third-party programs. The sources of these are usually found
31# in the $GSDLHOME/packages directory, and the executables should live in
32# $GSDLHOME/bin/$GSDLOS (which is on the search path).
33#
34# Currently, we can convert the following formats by using external
35# conversion utilities:
36# Microsoft Word (versions 2,6,7 [==95?], 8[==97?], 9[==2000?]), RTF,
37# Adobe PDF, PostScript, MS PowerPoint (95 and 97), and MS Excel (95 and 97).
38#
39# We can try to convert any file to text with a perl implementation of the
40# UNIX strings command.
41#
42# We try to convert Postscript files to text using "gs" which is often on
43# *nix machines. We fall back to performing weak text extraction by using
44# regular expressions.
45
46BEGIN {
47 die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
48 unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
49}
50
51use parsargv;
52use util;
53use Cwd;
54use File::Basename;
55
56# Are we running on WinNT or Win2000 (or later)?
57my $is_winnt_2000=eval {require Win32; return (Win32::IsWinNT()); return 0;};
58if (!defined($is_winnt_2000)) {$is_winnt_2000=0;}
59
60my $use_strings;
61my $pdf_complex;
62my $pdf_nohidden;
63my $pdf_zoom;
64my $pdf_ignore_images;
65my $pdf_allow_images_only;
66my $windows_scripting;
67
68sub print_usage
69{
70 print STDERR "\n";
71 print STDERR "gsConvert.pl: Converts documents in a range of formats to html\n";
72 print STDERR " or text using third-party programs.\n\n";
73 print STDERR " usage: $0 [options] filename\n";
74 print STDERR " options:\n\t-type\tdoc|dot|pdf|ps|ppt|rtf|xls\t(input file type)\n";
75 print STDERR "\t-errlog\t<filename>\t(append err messages)\n";
76 print STDERR "\t-output\tauto|html|text|pagedimage_jpg|pagedimage_gif|pagedimage_png\t(output file type)\n";
77 print STDERR "\t-timeout\t<max cpu seconds>\t(ulimit on unix systems)\n";
78 print STDERR "\t-use_strings\tuse strings to extract text if conversion fails\n";
79 print STDERR "\t-windows_scripting\tuse windows script when converting Microsoft Word and PPT via VB script\n";
80 print STDERR "\t-pdf_complex\tuse complex output when converting PDF to HTML\n";
81 print STDERR "\t-pdf_nohidden\tDon't attempt to extract hidden text from PDF files\n";
82 print STDERR "\t-pdf_ignore_images\tdon't attempt to extract images when\n";
83 print STDERR "\t\tconverting PDF to HTML\n";
84 print STDERR "\t-pdf_allow_images_only\tallow images only (continue even if no text is present when converting to HTML)\n";
85 print STDERR "\t-pdf_zoom\tfactor by which to zoom PDF (only useful if\n";
86 print STDERR "\t\t-pdf_complex is set\n";
87 exit(1);
88}
89
90my $faillogfile="";
91my $timeout=0;
92
93sub main
94{
95 my (@ARGV) = @_;
96 my ($input_type,$output_type,$verbose);
97
98 # read command-line arguments
99 if (!parsargv::parse(\@ARGV,
100 'type/(doc|dot|pdf|ps|ppt|rtf|xls)/', \$input_type,
101 '/errlog/.*/', \$faillogfile,
102 'output/(auto|html|text|pagedimage).*/', \$output_type,
103 'timeout/\d+/0',\$timeout,
104 'verbose/\d+/0', \$verbose,
105 'use_strings', \$use_strings,
106 'windows_scripting',\$windows_scripting,
107 'pdf_complex', \$pdf_complex,
108 'pdf_ignore_images', \$pdf_ignore_images,
109 'pdf_allow_images_only', \$pdf_allow_images_only,
110 'pdf_nohidden', \$pdf_nohidden,
111 'pdf_zoom/\d+/2', \$pdf_zoom
112 ))
113 {
114 print_usage();
115 }
116
117 # Make sure the input file exists and can be opened for reading
118 if (scalar(@ARGV!=1)) {
119 print_usage();
120 }
121
122 my $input_filename = $ARGV[0];
123 if (!-r $input_filename) {
124 print STDERR "Error: unable to open $input_filename for reading\n";
125 exit(1);
126 }
127
128 # Deduce filenames
129 my ($tailname,$dirname,$suffix)
130 = File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
131 my $output_filestem = &util::filename_cat($dirname, "$tailname");
132
133 if ($input_type eq "")
134 {
135 $input_type = lc (substr($suffix,1,length($suffix)-1));
136 }
137
138 # Change to temporary working directory
139 my $stored_dir = cwd();
140 chdir ($dirname) || die "Unable to change to directory $dirname";
141
142 # Select convert utility
143 if (!defined $input_type) {
144 print STDERR "Error: No filename extension or input type defined\n";
145 exit(1);
146 }
147 elsif ($input_type eq "doc" || $input_type eq "dot") {
148 print &convertDOC($input_filename, $output_filestem, $output_type);
149 print "\n";
150 }
151 elsif ($input_type eq "rtf") {
152 print &convertRTF($input_filename, $output_filestem, $output_type);
153 print "\n";
154 }
155 elsif ($input_type eq "pdf") {
156 print &convertPDF($dirname, $input_filename, $output_filestem, $output_type);
157 print "\n";
158 }
159 elsif ($input_type eq "ps") {
160 print &convertPS($input_filename, $output_filestem, $output_type);
161 print "\n";
162 }
163 elsif ($input_type eq "ppt") {
164 print &convertPPT($input_filename, $output_filestem, $output_type);
165 print "\n";
166 }
167 elsif ($input_type eq "xls") {
168 print &convertXLS($input_filename, $output_filestem, $output_type);
169 print "\n";
170 }
171 else {
172 print STDERR "Error: Unable to convert type '$input_type'\n";
173 exit(1);
174 }
175
176 # restore to original working directory
177 chdir ($stored_dir) || die "Unable to return to directory $stored_dir";
178
179}
180
181&main(@ARGV);
182
183
184
185# Document-type conversion functions
186#
187# The following functions attempt to convert documents from their
188# input type to the specified output type. If no output type was
189# given, then they first attempt HTML, and then TEXT.
190#
191# Each returns the output type ("html" or "text") or "fail" if no
192# conversion is possible.
193
194# Convert a Microsoft word document
195
196sub convertDOC {
197 ($input_filename, $output_filestem, $output_type) = @_;
198
199 # Many .doc files are not in fact word documents!
200 my $realtype = &find_docfile_type($input_filename);
201
202 if ($realtype eq "word6" || $realtype eq "word7" || $realtype eq "word8") {
203 return &convertWord678($input_filename, $output_filestem, $output_type);
204 } elsif ($realtype eq "rtf") {
205 return &convertRTF($input_filename, $output_filestem, $output_type);
206 } else {
207 return &convertAnything($input_filename, $output_filestem, $output_type);
208 }
209}
210
211# Convert a Microsoft word 6/7/8 document
212
213sub convertWord678 {
214 ($input_filename, $output_filestem, $output_type) = @_;
215
216 my $success = 0;
217 if (!$output_type || ($output_type =~ m/html/i)){
218 if ($windows_scripting) {
219 $success = &native_doc_to_html($input_filename, $output_filestem);
220 }
221 else {
222 $success = &doc_to_html($input_filename, $output_filestem);
223 }
224 if ($success) {
225 return "html";
226 }
227 }
228 return &convertAnything($input_filename, $output_filestem, $output_type);
229}
230
231
232# Convert a Rich Text Format (RTF) file
233
234sub convertRTF {
235 ($input_filename, $output_filestem, $output_type) = @_;
236
237 my $success = 0;
238
239 # Attempt specialised conversion to HTML
240 if (!$output_type || ($output_type =~ m/html/i)) {
241
242 if ($windows_scripting) {
243 $success = &native_doc_to_html($input_filename, $output_filestem);
244 }
245 else {
246 $success = &rtf_to_html($input_filename, $output_filestem);
247 }
248 if ($success) {
249 return "html";
250 }
251 }
252
253# rtf is so ugly that's it's not worth running strings over.
254# One day I'll write some quick'n'dirty regexps to try to extract text - jrm21
255# return &convertAnything($input_filename, $output_filestem, $output_type);
256 return "fail";
257}
258
259
260# Convert an unidentified file
261
262sub convertAnything {
263 ($input_filename, $output_filestem, $output_type) = @_;
264
265 my $success = 0;
266
267 # Attempt simple conversion to HTML
268 if (!$output_type || ($output_type =~ m/html/i)) {
269 $success = &any_to_html($input_filename, $output_filestem);
270 if ($success) {
271 return "html";
272 }
273 }
274
275 # Convert to text
276 if (!$output_type || ($output_type =~ m/text/i)) {
277 $success = &any_to_text($input_filename, $output_filestem);
278 if ($success) {
279 return "text";
280 }
281 }
282 return "fail";
283}
284
285
286
287# Convert an Adobe PDF document
288
289sub convertPDF {
290 my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
291
292 my $success = 0;
293 $output_type =~ s/.*\-(.*)/$1/i;
294 # Attempt coversion to Image
295 if ($output_type =~ m/jp?g|gif|png/i) {
296 $success = &pdfps_to_img($dirname, $input_filename, $output_filestem, $output_type);
297 if ($success){
298 return "item";
299 }
300 }
301
302 # Attempt conversion to HTML
303 if (!$output_type || ($output_type =~ m/html/i)) {
304 $success = &pdf_to_html($dirname, $input_filename, $output_filestem);
305 if ($success) {
306 return "html";
307 }
308 }
309
310 # Attempt conversion to TEXT
311 if (!$output_type || ($output_type =~ m/text/i)) {
312 $success = &pdf_to_text($dirname, $input_filename, $output_filestem);
313 if ($success) {
314 return "text";
315 }
316 }
317
318 return "fail";
319
320}
321
322
323# Convert an Adobe PostScript document
324
325sub convertPS {
326 ($input_filename, $output_filestem, $output_type) = @_;
327
328 my $success = 0;
329 $output_type =~ s/.*\-(.*)/$1/i;
330 # Attempt coversion to Image
331 if ($output_type =~ m/jp?g|gif|png/i) {
332 $success = &pdfps_to_img($dirname, $input_filename, $output_filestem, $output_type);
333 if ($success){
334 return "item";
335 }
336 }
337
338 # Attempt conversion to TEXT
339 if (!$output_type || ($output_type =~ m/text/i)) {
340 $success = &ps_to_text($input_filename, $output_filestem);
341 if ($success) {
342 return "text";
343 }
344 }
345 return "fail";
346}
347
348
349sub convertPPT {
350 my ($input_filename, $output_filestem, $output_type) = @_;
351 my $success = 0;
352
353 my $ppt_convert_type = "";
354 #if (!$output_type || $windows_scripting || ($output_type !~ m/html/i) || ($output_type !~ m/text/i)){
355 if ($windows_scripting && ($output_type !~ m/html/i) && ($output_type !~ m/text/i)){
356 if ($output_type =~ m/gif/i) {
357 $ppt_convert_type = "-g";
358 } elsif ($output_type =~ m/jp?g/i){
359 $ppt_convert_type = "-j";
360 } elsif ($output_type =~ m/png/i){
361 $ppt_convert_type = "-p";
362 }
363 my $vbScript = &util::filename_cat($ENV{'GSDLHOME'}, "bin",
364 $ENV{'GSDLOS'}, "pptextract");
365 $vbScript = "pptextract" if ($ENV{'GSDLOS'} =~ m/^windows$/i);
366
367 $cmd = "";
368 if ($timeout) {$cmd = "ulimit -t $timeout;";}
369 # if the converting directory has already existed
370 if (-d $output_filestem) {
371 print STDERR "**The conversion directory has existed\n";
372 return "item";
373 } else {
374 $cmd .= "$vbScript $ppt_convert_type \"$input_filename\" \"$output_filestem\"";
375 $cmd .= " 2>\"$output_filestem.err\""
376 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
377 if (system($cmd) !=0) {
378 print STDERR "Powerpoint VB Scripting convert failed\n";
379 } else {
380 return "item";
381 }
382 }
383 } elsif (!$output_type || ($output_type =~ m/html/i)) {
384 # Attempt conversion to HTML
385 #if (!$output_type || ($output_type =~ m/html/i)) {
386 # formulate the command
387 $cmd = "";
388 $cmd .= "perl -S ppttohtml.pl ";
389 $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
390 $cmd .= " 2>\"$output_filestem.err\""
391 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
392
393 # execute the command
394 $!=0;
395 if (system($cmd)!=0)
396 {
397 print STDERR "Powerpoint 95/97 converter failed $!\n";
398 } else {
399 return "html";
400 }
401 }
402
403 $success = &any_to_text($input_filename, $output_filestem);
404 if ($success) {
405 return "text";
406 }
407
408 return "fail";
409}
410
411
412sub convertXLS {
413 my ($input_filename, $output_filestem, $output_type) = @_;
414
415 my $success = 0;
416
417 # Attempt conversion to HTML
418 if (!$output_type || ($output_type =~ m/html/i)) {
419 # formulate the command
420 $cmd = "";
421 $cmd .= "perl -S xlstohtml.pl ";
422 $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
423 $cmd .= " 2>\"$output_filestem.err\""
424 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
425
426
427 # execute the command
428 $!=0;
429 if (system($cmd)!=0)
430 {
431 print STDERR "Excel 95/97 converter failed $!\n";
432 } else {
433 return "html";
434 }
435 }
436
437 $success = &any_to_text($input_filename, $output_filestem);
438 if ($success) {
439 return "text";
440 }
441
442 return "fail";
443}
444
445
446
447# Find the real type of a .doc file
448#
449# We seem to have a lot of files with a .doc extension that are .rtf
450# files or Word 5 files. This function attempts to tell the difference.
451sub find_docfile_type {
452 ($input_filename) = @_;
453
454 open(CHK, "<$input_filename");
455 binmode(CHK);
456 my $line = "";
457 my $first = 1;
458
459 while (<CHK>) {
460
461 $line = $_;
462
463 if ($first) {
464 # check to see if this is an rtf file
465 if ($line =~ m/^\{\\rtf/) {
466 close(CHK);
467 return "rtf";
468 }
469 $first = 0;
470 }
471
472 # is this is a word 6/7/8 document?
473 if ($line =~ m/Word\.Document\.([678])/) {
474 close(CHK);
475 return "word$1";
476 }
477
478 }
479
480 return "unknown";
481}
482
483
484# Specific type-to-type conversions
485#
486# Each of the following functions attempts to convert a document from
487# a specific format to another. If they succeed they return 1 and leave
488# the output document(s) in the appropriate place; if they fail they
489# return 0 and delete any working files.
490
491
492# Attempt to convert a word document to html with the wv program
493sub doc_to_html {
494 ($input_filename, $output_filestem) = @_;
495
496 my $wvWare = &util::filename_cat($ENV{'GSDLHOME'}, "bin",
497 $ENV{'GSDLOS'}, "wvWare");
498
499 # don't include path on windows (to avoid having to play about
500 # with quoting when GSDLHOME might contain spaces) but assume
501 # that the PATH is set up correctly
502 $wvWare = "wvWare" if ($ENV{'GSDLOS'} =~ m/^windows$/i);
503
504 my $wv_conf = &util::filename_cat($ENV{'GSDLHOME'}, "etc",
505 "packages", "wv", "wvHtml.xml");
506
507 # Added the following to work with replace_srcdoc_with_html.pl:
508 # Make wvWare put any associated (image) files of the word doc into
509 # folder docname-without-extention_files. This folder should be at
510 # the same level as the html file generated from the doc.
511 # wvWare will take care of proper interlinking.
512
513 # This step is necessary for replace_srcdoc_with_html.pl which will
514 # move the html and associated files into the import folder. We
515 # want to ensure that the associated files won't overwrite similarly
516 # named items already in import. Hence we put them in a folder first
517 # (to which the html links properly) and that will allow
518 # replace_srcdoc_with_html.pl to move them safely to /import.
519
520 # To do all this, we need to use wvWare's --dir and --basename options
521 # where dir is the full path to the image folder directory and
522 # basename is the full path to the image folder appended to the name
523 # which is to be prepended to every image file:
524 # eg. if the images were to have names like sample0.jpg to sampleN.jpg,
525 # then the basename is "/full/path/to/imgdir/sample".
526 # In this case, basename is the full path to and name of the document.
527 # HOWEVER: basename always takes full path, not relative url, so
528 # the greenstone browser is unable to display the images (absolute paths
529 # cause it to give an "external link" message)
530 # See http://osdir.com/ml/lib.wvware.devel/2002-11/msg00014.html
531 # and http://rpmfind.net/linux/RPM/freshmeat/rpms/wv/wv-0.5.44-1.i386.html
532 # "added --dir option to wvHtml so that pictures can be placed in
533 # a seperate directory"
534 # "running wvWare through IMP to view word documents as html. It gets
535 # invoked like this:
536 # wvWare --dir=/tmp-wvWare --basename=/tmp-wvWare/img$$- $tmp_word >$tmp_output"
537
538 # toppath is the folder where html is generated
539 # docname is the name (without extension) of the html to be generated
540 # suffix (extension) is thrown away
541 my ($docname, $toppath)
542 = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
543
544 # We want the image folder generated to have the same name as windows
545 # would generate ($windows_scripting) when it converts from word to html.
546 # That is, foldername=docname_files
547 my $assoc_dir = &util::filename_cat($toppath, $docname."_files");
548 #print "assoc_dir: ".$assoc_dir."\n"; # same as "$output_filestem._files"
549
550 # ensure this image directory exists
551 # if it exists already, just delete and recreate
552 if(-e $assoc_dir) {
553 &util::rm_r($assoc_dir);
554 }
555 &util::mk_dir($assoc_dir);
556
557 # the images are all going to be called image0, image1,..., imageN
558 my $img_basenames = &util::filename_cat($assoc_dir, $docname);
559
560 #print STDERR "****toppath: $toppath\n****docname: $docname\n;
561 #print STDERR "****img_basenames: $img_basenames\n" if($img_basenames);
562 #print STDERR "****assoc_dir: $assoc_dir\n" if($assoc_dir);
563
564 my $cmd = "";
565 if ($timeout) {$cmd = "ulimit -t $timeout;";}
566 # wvWare's --dir and --basename options for image directory.
567 # Replaced the next line with the *2 lines* following it:
568 # $cmd .= "$wvWare --charset utf-8 --config \"$wv_conf\"";
569 $cmd .= "$wvWare --dir \"$assoc_dir\" --basename \"$img_basenames\"";
570 $cmd .= " --charset utf-8 --config \"$wv_conf\"";
571 $cmd .= " \"$input_filename\" > \"$output_filestem.html\"";
572
573 # redirecting STDERR is a bad idea on windows 95/98
574 $cmd .= " 2> \"$output_filestem.err\""
575 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
576 # execute the command
577 $!=0;
578 if (system($cmd)!=0)
579 {
580 print STDERR "Error executing wv converter:$!\n";
581 if (-s "$output_filestem.err") {
582 open (ERRFILE, "<$output_filestem.err");
583
584 my $write_to_fail_log=0;
585 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
586 {$write_to_fail_log=1;}
587
588 my $line;
589 while ($line=<ERRFILE>) {
590 if ($line =~ m/\w/) {
591 print STDERR "$line";
592 print FAILLOG "$line" if ($write_to_fail_log);
593 }
594 if ($line !~ m/startup error/) {next;}
595 print STDERR " (given an invalid .DOC file?)\n";
596 print FAILLOG " (given an invalid .DOC file?)\n"
597 if ($write_to_fail_log);
598
599 } # while ERRFILE
600 close FAILLOG if ($write_to_fail_log);
601 }
602 return 0; # we can try any_to_text
603 }
604
605 # Was the conversion successful?
606
607 if (-s "$output_filestem.html") { # if file has non-zero size (i.e. it has contents)
608 open(TMP, "$output_filestem.html");
609 $line = <TMP>;
610 close(TMP);
611 if ($line && $line =~ m/DOCTYPE HTML/) {
612 &util::rm("$output_filestem.err") if -e "$output_filestem.err";
613
614 # Inserted this code to remove the images directory if it was still empty after
615 # the html was generated (in case there were no images in the word document)
616 if (&util::is_dir_empty($assoc_dir)) {
617 #print STDERR "***gsConvert.pl: Image dir $assoc_dir is empty, removing***\n";
618 &util::rm_r($assoc_dir);
619 } else { # there was an image folder (it was generated)
620 # Therefore, the html file generated contains absolute links to the images
621 # Replace them with relative links instead, so the folder can be moved elsewhere
622 &make_links_to_assocdir_relative($toppath, $docname, "$output_filestem.html", $assoc_dir, $docname."_files");
623 }
624 return 1;
625 }
626 }
627
628 # If here, an error of some sort occurred
629 &util::rm("$output_filestem.html") if -e "$output_filestem.html";
630 if (-e "$output_filestem.err") {
631 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile"))) {
632 open (ERRLOG,"$output_filestem.err");
633 while (<ERRLOG>) {print FAILLOG $_;}
634 close FAILLOG;
635 close ERRLOG;
636 }
637 &util::rm("$output_filestem.err");
638 }
639
640 return 0;
641}
642
643# Method to work with doc_to_html - Word docs might contain images.
644# When such word docs are converted with wvWare, we make it generate a
645# <filename>_files folder with the associated images, while the html file
646# <filename> refers to the images using absolute paths to <filename>_files.
647# This method reads in that html file and replaces all the absolute paths to
648# the images in <filename>_files with the relative paths to the images from
649# that folder. (I.e. with <filename>_files/<imagename.ext>).
650sub make_links_to_assocdir_relative{
651 # toppath is the top-level folder in which the html file we're going to be fixing resides
652 # docname is just the name (without extension) of the html file
653 # html_file is the full path to the html file: /full/path/docname.html
654 # assoc_dir_path is toppath/docname_files
655 # assoc_dirname is the directory name of the folder with associated imgs: docname_files
656 my ($toppath, $docname, $html_file, $assoc_dir_path, $assoc_dirname) = @_;
657
658 # 1. Read all the contents of the html into a string
659 # open the original file for reading
660 unless(open(FIN, "<$html_file")) {
661 print STDERR "gsConvert.pl: Unable to open $html_file for reading absolute urls...ERROR: $!\n";
662 return 0;
663 }
664 # From http://perl.plover.com/local.html
665 # "It's cheaper to read the file all at once, without all the splitting and reassembling.
666 # (Some people call this slurping the file.) Perl has a special feature to support this:
667 # If the $/ variable is undefined, the <...> operator will read the entire file all at once"
668 my $html_contents;
669 {
670 local $/ = undef; # Read entire file at once
671 $html_contents = <FIN>; # Now file is read in as one single 'line'
672 }
673 close(FIN); # close the file
674 #print STDERR $html_contents;
675
676 # 2. Replace (substitute) *all* ocurrences of the assoc_dir_path in a hrefs and img src
677 # values with assoc_dirname
678 # At the end: g means substitute all occurrences (global), while s at the end means treat
679 # all new lines as a regular space. This interacts with g to consider all the lines
680 # together as a single line so that multi-occurrences can be replaced.
681
682 # we can't just replace $assoc_dir_path with $assoc_dir
683 # $assoc_dir_path represents a regular expression that needs to be replaced
684 # if it contains ., -, [, ], or Windows style backslashes in paths -- which all have special
685 # meaning in Perl regular expressions -- we need to escape these first
686 my $safe_reg_expression = $assoc_dir_path;
687 $safe_reg_expression =~ s/\\/\\\\/g;
688 $safe_reg_expression =~ s/\./\\./g;
689 $safe_reg_expression =~ s/\-/\\-/g;
690 $safe_reg_expression =~ s/\[/\\[/g;
691 $safe_reg_expression =~ s/\]/\\]/g;
692 $safe_reg_expression =~ s/ /%20/g; # wvWare put %20 in place of space, so we need to change our prefix to match
693
694 # The following regular expression substitution looks for <a or <image, followed by any other
695 # attributes and values until it comes to the FIRST (indicated by ?) href= or src=
696 # followed by " or ' no quotes at all around path, followed by the associated folder's pathname
697 # followed by characters (for the img filename), then finally the optional closing quotes
698 # in " or ' form, followed by any other attributes and values until the first > to end the tag.
699 # The substitution: all the parts preceding associated folder's pathname are retained,
700 # the associated folder path name is replaced by associated folder directory name
701 # and the rest upto and including the closing > tag is retained.
702 # The sg at the end of the pattern match treats all of html_contents as a single line (s)
703 # and performs a global replace (g) meaning that all occurrences that match in that single line
704 # are substituted.
705 $html_contents =~ s/(<(a|img).*?(href|src)=(\"|\')?)$safe_reg_expression(.*?(\"|\')?.*?>)/$1$assoc_dirname$5/sg;
706 #$html_contents =~ s/$safe_reg_expression/$assoc_dirname/gs; # this works, used as fall-back
707 # now replace any %20 chars in filenames of href or src attributes to use literal space ' '. Calls a function for this
708 $html_contents =~ s/(<(a|img).*?(href|src)=(\"|\')?)(.*)(.*?(\"|\')?.*?>)/&post_process_assocfile_urls($1, $5, $6)/sge;
709
710 #print STDERR "****assoc_dirname: $assoc_dirname***\n";
711 #print STDERR "****safe_reg_expression: $safe_reg_expression***\n";
712
713 # delete the original file and recreate it
714 my $copy_of_filename = $html_file;
715 &util::rm($copy_of_filename); # deleted the file
716
717 # Recreate the original file for writing the updated contents
718 unless(open(FOUT, ">$html_file")) { # open it as a new file for writing
719 print STDERR "gsConvert.pl: Unable to open $html_file for writing relative links...ERROR: $!\n";
720 return 0;
721 }
722
723 # write out the updated contents and close the file
724 print FOUT $html_contents;
725 close(FOUT);
726 return 1;
727}
728
729# Utility routine to make sure HTML plugin gets img src/href link pathnames that contain
730# url slashes (/) instead of windows-style backwards slashes, and to convert all %20
731# introduced in link pathnames by wvWare into space again. Converts all percent signs
732# introduced by URL encoding filenames generated into %25 in these url links referencing them
733sub post_process_assocfile_urls
734{
735 my ($pre, $text, $post) = @_;
736
737 $text =~ s/%20/ /g; # reinstated this line, since we no longer replace spaces with %20
738 $text =~ s/\\/\//g;
739 $text =~ s/%/%25/g;
740
741 return "$pre$text$post";
742}
743
744# Attempt to convert a word document to html with the word2html scripting program
745sub native_doc_to_html {
746 ($input_filename, $output_filestem) = @_;
747
748 my $vbScript = &util::filename_cat($ENV{'GSDLHOME'}, "bin",
749 $ENV{'GSDLOS'}, "word2html");
750
751 $vbScript = "word2html" if ($ENV{'GSDLOS'} =~ m/^windows$/i);
752 if (-e "$output_filestem.html") {
753 print STDERR "*** The conversion file has existed\n";
754 return 1;
755 }
756
757 my $cmd = "";
758 if ($timeout) {$cmd = "ulimit -t $timeout;";}
759 #$cmd .= "$vbScript \"$input_filename\" \"$output_filestem.html\"";
760 #$cmd .= "$vbScript $input_filename $output_filestem.html";
761 $cmd .= "$vbScript \"$input_filename\" \"$output_filestem.html\"";
762
763 # redirecting STDERR
764 $cmd .= " 2> \"$output_filestem.err\""
765 if ($ENV {'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
766
767 # execute the command
768 $!=0;
769 if (system($cmd)!=0)
770 {
771 print STDERR "Error executing word2Html converter:$!\n";
772 if (-s "$output_filestem.err") {
773 open (ERRFILE, "<$output_filestem.err");
774
775 my $write_to_fail_log=0;
776 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
777 {$write_to_fail_log=1;}
778
779 my $line;
780 while ($line=<ERRFILE>) {
781 if ($line =~ m/\w/) {
782 print STDERR "$line";
783 print FAILLOG "$line" if ($write_to_fail_log);
784 }
785 if ($line !~ m/startup error/) {next;}
786 print STDERR " (given an invalid .DOC file?)\n";
787 print FAILLOG " (given an invalid .DOC file?)\n"
788 if ($write_to_fail_log);
789
790 } # while ERRFILE
791 close FAILLOG if ($write_to_fail_log);
792 }
793 return 0; # we can try any_to_text
794 }
795
796 # Was the conversion successful?
797 if (-s "$output_filestem.html") {
798 open(TMP, "$output_filestem.html");
799 $line = <TMP>;
800 close(TMP);
801 if ($line && $line =~ m/html/) {
802 &util::rm("$output_filestem.err") if -e "$output_filestem.err";
803 return 1;
804 }
805 }
806
807 # If here, an error of some sort occurred
808 &util::rm("$output_filestem.html") if -e "$output_filestem.html";
809 if (-e "$output_filestem.err") {
810 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile"))) {
811 open (ERRLOG,"$output_filestem.err");
812 while (<ERRLOG>) {print FAILLOG $_;}
813 close FAILLOG;
814 close ERRLOG;
815 }
816 &util::rm("$output_filestem.err");
817 }
818 return 0;
819}
820
821# Attempt to convert an RTF document to html with rtftohtml
822
823sub rtf_to_html {
824 my ($input_filename, $output_filestem) = @_;
825
826 # formulate the command
827 $cmd = "";
828 if ($timeout) {$cmd = "ulimit -t $timeout;";}
829 $cmd .= "rtftohtml";
830 #$cmd .= "rtf-converter";
831
832 $cmd .= " -o \"$output_filestem.html\" \"$input_filename\"";
833
834 $cmd .= " 2>\"$output_filestem.err\""
835 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000);
836
837
838 # execute the command
839 $!=0;
840 if (system($cmd)!=0)
841 {
842 print STDERR "Error executing rtf converter $!\n";
843 # don't currently bother printing out error log...
844 # keep going, in case it still created an HTML file...
845 }
846
847 # Was the conversion successful?
848 my $was_successful=0;
849 if (-s "$output_filestem.html") {
850 # make sure we have some content other than header
851 open (HTML, "$output_filestem.html"); # what to do if fail?
852 my $line;
853 my $past_header=0;
854 while ($line=<HTML>) {
855
856 if ($past_header == 0) {
857 if ($line =~ m/<body>/) {$past_header=1;}
858 next;
859 }
860
861 $line =~ s/<[^>]+>//g;
862 if ($line =~ m/\w/ && $past_header) { # we found some content...
863 $was_successful=1;
864 last;
865 }
866 }
867 close HTML;
868 }
869
870 if ($was_successful) {
871 &util::rm("$output_filestem.err")
872 if (-e "$output_filestem.err");
873 # insert the (modified) table of contents, if it exists.
874 if (-e "${output_filestem}_ToC.html") {
875 &util::mv("$output_filestem.html","$output_filestem.src");
876 my $open_failed=0;
877 open HTMLSRC, "$output_filestem.src" || ++$open_failed;
878 open TOC, "${output_filestem}_ToC.html" || ++$open_failed;
879 open HTML, ">$output_filestem.html" || ++$open_failed;
880
881 if ($open_failed) {
882 close HTMLSRC;
883 close TOC;
884 close HTML;
885 &util::mv("$output_filestem.src","$output_filestem.html");
886 return 1;
887 }
888
889 # print out header info from src html.
890 while (defined($_ = <HTMLSRC>) && $_ =~ m/\w/) {
891 print HTML "$_";
892 }
893
894 # print out table of contents, making links relative
895 <TOC>; <TOC>; # ignore first 2 lines
896 print HTML scalar(<TOC>); # line 3 = "<ol>\n"
897 my $line;
898 while ($line=<TOC>) {
899 $line =~ s@</body></html>$@@ ; # only last line has this
900 # make link relative
901 $line =~ s@href=\"[^\#]+@href=\"@;
902 print HTML $line;
903 }
904 close TOC;
905
906 # rest of html src
907 while (<HTMLSRC>) {
908 print HTML $_;
909 }
910 close HTMLSRC;
911 close HTML;
912
913 &util::rm("${output_filestem}_ToC.html");
914 &util::rm("${output_filestem}.src");
915 }
916 # we don't yet do anything with footnotes ($output_filestem_fn.html) :(
917 return 1; # success
918 }
919
920 if (-e "$output_filestem.err") {
921 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
922 {
923 print FAILLOG "Error - rtftohtml - couldn't extract text\n";
924 #print FAILLOG "Error - rtf-converter - couldn't extract text\n";
925 print FAILLOG " (rtf file might be too recent):\n";
926 open (ERRLOG, "$output_filestem.err");
927 while (<ERRLOG>) {print FAILLOG $_;}
928 close ERRLOG;
929 close FAILLOG;
930 }
931 &util::rm("$output_filestem.err");
932 }
933
934 &util::rm("$output_filestem.html") if (-e "$output_filestem.html");
935
936 return 0;
937}
938
939
940# Convert a pdf file to html with the pdftohtml command
941
942sub pdf_to_html {
943 my ($dirname, $input_filename, $output_filestem) = @_;
944
945 $cmd = "";
946 if ($timeout) {$cmd = "ulimit -t $timeout;";}
947 $cmd .= "perl -S pdftohtml.pl -zoom $pdf_zoom";
948 $cmd .= " -c" if ($pdf_complex);
949 $cmd .= " -i" if ($pdf_ignore_images);
950 $cmd .= " -a" if ($pdf_allow_images_only);
951 $cmd .= " -hidden" unless ($pdf_nohidden);
952 $cmd .= " \"$input_filename\" \"$output_filestem\"";
953
954 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000) {
955 $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
956 } else {
957 $cmd .= " > \"$output_filestem.err\"";
958 }
959
960 $!=0;
961
962 my $retval=system($cmd);
963 if ($retval!=0)
964 {
965 print STDERR "Error executing pdftohtml.pl";
966 if ($!) {print STDERR ": $!";}
967 print STDERR "\n";
968 }
969
970 # make sure the converter made something
971 if ($retval!=0 || ! -s "$output_filestem.html")
972 {
973 &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
974 # print out the converter's std err, if any
975 if (-s "$output_filestem.err") {
976 open (ERRLOG, "$output_filestem.err") || die "$!";
977 print STDERR "pdftohtml error log:\n";
978 while (<ERRLOG>) {
979 print STDERR "$_";
980 }
981 close ERRLOG;
982 }
983 &util::rm("$output_filestem.html") if (-e "$output_filestem.html");
984 if (-e "$output_filestem.err") {
985 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
986 {
987 open (ERRLOG, "$output_filestem.err");
988 while (<ERRLOG>) {print FAILLOG $_;}
989 close ERRLOG;
990 close FAILLOG;
991 }
992 &util::rm("$output_filestem.err");
993 }
994 return 0;
995 }
996
997 &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
998 &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
999 return 1;
1000}
1001
1002# Convert a pdf file to various types of image with the convert command
1003
1004sub pdfps_to_img {
1005 my ($dirname, $input_filename, $output_filestem, $output_type) = @_;
1006
1007 # Check that ImageMagick is installed and available on the path (except for Windows 95/98)
1008 if (!($ENV{'GSDLOS'} eq "windows" && !Win32::IsWinNT())) {
1009 my $result = `identify 2>&1`;
1010 if ($? == -1 || $? == 256) { # Linux and Windows return different values for "program not found"
1011 #ImageMagick is not installed, thus the convert utility is not available.
1012 print STDERR "*** ImageMagick is not installed, the convert utility is not available. Unable to convert PDF/PS to images\n";
1013 return 0;
1014 }
1015 }
1016
1017 $cmd = "";
1018 if ($timeout) {$cmd = "ulimit -t $timeout;";}
1019 $output_type =~ s/.*\_(.*)/$1/i;
1020 $cmd .= "perl -S pdfpstoimg.pl -convert_to $output_type \"$input_filename\" \"$output_filestem\"";
1021 if ($ENV{'GSDLOS'} !~ m/^windows$/i || $is_winnt_2000) {
1022 $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
1023 } else {
1024 $cmd .= " > \"$output_filestem.err\"";
1025 }
1026
1027 # don't include path on windows (to avoid having to play about
1028 # with quoting when GSDLHOME might contain spaces) but assume
1029 # that the PATH is set up correctly
1030 $!=0;
1031 my $retval=system($cmd);
1032 if ($retval!=0)
1033 {
1034 print STDERR "Error executing pdftoimg.pl";
1035 if ($!) {print STDERR ": $!";}
1036 print STDERR "\n";
1037 }
1038
1039 #make sure the converter made something
1040 #if ($retval !=0) || ! -s "$output_filestem")
1041 if ($retval !=0)
1042 {
1043 &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
1044 #print out the converter's std err, if any
1045 if (-s "$output_filestem.err") {
1046 open (ERRLOG, "$output_filestem.err") || die "$!";
1047 print STDERR "pdfpstoimg error log:\n";
1048 while (<ERRLOG>) {
1049 print STDERR "$_";
1050 }
1051 close ERRLOG;
1052 }
1053 #&util::rm("$output_filestem.html") if (-e "$output_filestem.html");
1054 if (-e "$output_filestem.err") {
1055 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
1056 {
1057 open (ERRLOG, "$output_filestem.err");
1058 while (<ERRLOG>) {print FAILLOG $_;}
1059 close ERRLOG;
1060 close FAILLOG;
1061 }
1062 &util::rm("$output_filestem.err");
1063 }
1064 return 0;
1065 }
1066 &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
1067 &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
1068 return 1;
1069}
1070
1071# Convert a PDF file to text with the pdftotext command
1072
1073sub pdf_to_text {
1074 my ($dirname, $input_filename, $output_filestem) = @_;
1075
1076 my $cmd = "pdftotext \"$input_filename\" \"$output_filestem.text\"";
1077
1078 if ($ENV{'GSDLOS'} !~ m/^windows$/i) {
1079 $cmd .= " > \"$output_filestem.out\" 2> \"$output_filestem.err\"";
1080 } else {
1081 $cmd .= " > \"$output_filestem.err\"";
1082 }
1083
1084 if (system($cmd)!=0)
1085 {
1086 print STDERR "Error executing $cmd: $!\n";
1087 &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
1088 }
1089
1090 # make sure there is some extracted text.
1091 if (-e "$output_filestem.text") {
1092 open (EXTR_TEXT, "$output_filestem.text") || warn "open: $!";
1093 binmode(EXTR_TEXT); # just in case...
1094 my $line="";
1095 my $seen_text=0;
1096 while (($seen_text==0) && ($line=<EXTR_TEXT>)) {
1097 if ($line=~ m/\w/) {$seen_text=1;}
1098 }
1099 close EXTR_TEXT;
1100 if ($seen_text==0) { # no text was extracted
1101 print STDERR "Error: pdftotext found no text\n";
1102 &util::rm("$output_filestem.text");
1103 }
1104 }
1105
1106 # make sure the converter made something
1107 if (! -s "$output_filestem.text")
1108 {
1109 # print out the converters std err, if any
1110 if (-s "$output_filestem.err") {
1111 open (ERRLOG, "$output_filestem.err") || die "$!";
1112 print STDERR "pdftotext error log:\n";
1113 while (<ERRLOG>) {
1114 print STDERR "$_";
1115 }
1116 close ERRLOG;
1117 }
1118 # does this converter create a .out file?
1119 &util::rm("$output_filestem.out") if (-e "$output_filestem.out");
1120 &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
1121 if (-e "$output_filestem.err") {
1122 if ($faillogfile ne "" && defined(open(FAILLOG,">>$faillogfile")))
1123 {
1124 open (ERRLOG,"$output_filestem.err");
1125 while (<ERRLOG>) {print FAILLOG $_;}
1126 close ERRLOG;
1127 close FAILLOG;
1128 }
1129 &util::rm("$output_filestem.err");
1130 }
1131 return 0;
1132 }
1133 &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
1134 return 1;
1135}
1136
1137# Convert a PostScript document to text
1138# note - just using "ps2ascii" isn't good enough, as it
1139# returns 0 for a postscript interpreter error. ps2ascii is just
1140# a wrapper to "gs" anyway, so we use that cmd here.
1141
1142sub ps_to_text {
1143 my ($input_filename, $output_filestem) = @_;
1144
1145 my $error = "";
1146
1147 # if we're on windows we'll fall straight through without attempting
1148 # to use gs
1149 if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1150 $error = "Windows does not support gs";
1151
1152 } else {
1153 my $cmd = "";
1154 if ($timeout) {$cmd = "ulimit -t $timeout; ";}
1155 $cmd .= "gs -q -dNODISPLAY -dNOBIND -dWRITESYSTEMDICT -dSIMPLE -c save ";
1156 $cmd .= "-f ps2ascii.ps \"$input_filename\" -c quit > \"$output_filestem.text\"";
1157 #$cmd .= "pstotext -output \"$output_filestem.text\" $input_filename\"";
1158 $cmd .= " 2> $output_filestem.err";
1159 $!=0;
1160
1161 my $retcode=system($cmd);
1162 $retcode = $? >> 8; # see man perlfunc - system for this...
1163 # if system returns -1 | 127 (couldn't start program), look at $! for message
1164
1165 if ($retcode!=0) {if ($!) {$error=$!;} else {$error="couldn't run.\n";}}
1166 elsif (! -e "$output_filestem.text") {
1167 $error="did not create output file.\n";
1168 }
1169 else
1170 { # make sure the interpreter didn't get an error. It is technically
1171 # possible for the actual text to start with this, but....
1172 open PSOUT, "$output_filestem.text";
1173 if (<PSOUT> =~ m/^Error: (.*)/) {
1174 $error="interpreter error - \"$1\"";
1175 }
1176 close PSOUT;
1177 }
1178 }
1179
1180 if ($error ne "")
1181 {
1182 print STDERR "Warning: Error executing gs: $error\n";
1183 &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
1184
1185 if ("$faillogfile" ne "" && defined(open (FAILLOG, ">>$faillogfile")))
1186 {
1187 print FAILLOG "gs - $error\n";
1188 if (-e "$output_filestem.err") {
1189 open(ERRLOG, "$output_filestem.err");
1190 while (<ERRLOG>) {print FAILLOG $_;}
1191 close ERRLOG;
1192 }
1193 close FAILLOG;
1194 }
1195 &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
1196
1197
1198 # Fine then. We'll just do a lousy job by ourselves...
1199 # Based on 5-line regexp sed script found at:
1200 # http://snark.ptc.spbu.ru/mail-archives/lout/brown/msg00003.html
1201 #
1202 print STDERR "Stripping text from postscript\n";
1203 my $errorcode=0;
1204 open (IN, "$input_filename")
1205 || ($errorcode=1, warn "Couldn't read file: $!");
1206 open (OUT, ">$output_filestem.text")
1207 || ($errorcode=1, warn "Couldn't write file: $!");
1208 if ($errorcode) {print STDERR "errors\n";return 0;}
1209
1210 my $text=""; # this is for whole .ps file...
1211 $text = join('', <IN>); # see man perlport, under "System Resources"
1212 close IN;
1213
1214 # Make sure this is a ps file...
1215 if ($text !~ m/^%!/) {
1216 print STDERR "Bad postscript header: not '%!'\n";
1217 if ($faillogfile ne "" && defined(open(FAILLOG, ">>$faillogfile")))
1218 {
1219 print FAILLOG "Bad postscript header: not '%!'\n";
1220 close FAILLOG;
1221 }
1222 return 0;
1223 }
1224
1225 # if ps has Page data, then use it to delete all stuff before it.
1226 $text =~ s/^.*?%%Page:.*?\n//s; # treat string as single line
1227
1228 # remove all leading non-data stuff
1229 $text =~ s/^.*?\(//s;
1230
1231 # remove all newline chars for easier processing
1232 $text =~ s/\n//g;
1233
1234 # Big assumption here - assume that if any co-ordinates are
1235 # given, then we are at the end of a sentence.
1236 $text =~ s/\)-?\d+\ -?\d+/\) \(\n\)/g;
1237
1238 # special characters--
1239 $text =~ s/\(\|\)/\(\ - \)/g; # j -> em-dash?
1240
1241 # ? ps text formatting (eg italics?) ?
1242 $text =~ s/Fn\(f\)/\(\{\)/g; # f -> {
1243 $text =~ s/Fn\(g\)/\(\}\)/g; # g -> }
1244 $text =~ s/Fn\(j\)/\(\|\)/g; # j -> |
1245 # default - remove the rest
1246 $text =~ s/\ ?F.\((.+?)\)/\($1\)/g;
1247
1248 # attempt to add whitespace between words...
1249 # this is based purely on observation, and may be completely wrong...
1250 $text =~ s/([^F])[defghijkuy]\(/$1 \( /g;
1251 # eg I notice "b(" is sometimes NOT a space if preceded by a
1252 # negative number.
1253 $text =~ s/\)\d+ ?b\(/\) \( /g;
1254
1255 # change quoted braces to brackets
1256 $text =~ s/([^\\])\\\(/$1\{/g;
1257 $text =~ s/([^\\])\\\)/$1\}/g ;
1258
1259 # remove everything that is not between braces
1260 $text =~ s/\)([^\(\)])+?\(//sg ;
1261
1262 # remove any Trailer eof stuff.
1263 $text =~ s/\)[^\)]*$//sg;
1264
1265 ### ligatures have special characters...
1266 $text =~ s/\\013/ff/g;
1267 $text =~ s/\\014/fi/g;
1268 $text =~ s/\\015/fl/g;
1269 $text =~ s/\\016/ffi/g;
1270 $text =~ s/\\214/fi/g;
1271 $text =~ s/\\215/fl/g;
1272 $text =~ s/\\017/\n\* /g; # asterisk?
1273 $text =~ s/\\023/\023/g; # e acute ('e)
1274 $text =~ s/\\177/\252/g; # u"
1275# $text =~ s/ ?? /\344/g; # a"
1276
1277 print OUT "$text";
1278 close OUT;
1279 }
1280 # wrap the text - use a minimum length. ie, first space after this length.
1281 my $wrap_length=72;
1282 &util::mv("$output_filestem.text", "$output_filestem.text.tmp");
1283 open INFILE, "$output_filestem.text.tmp" ||
1284 die "Couldn't open file: $!";
1285 open OUTFILE, ">$output_filestem.text" ||
1286 die "Couldn't open file for writing: $!";
1287 my $line="";
1288 while ($line=<INFILE>) {
1289 while (length($line)>0) {
1290 if (length($line)>$wrap_length) {
1291 $line =~ s/^(.{$wrap_length}[^\s]*)\s*//;
1292 print OUTFILE "$1\n";
1293 } else {
1294 print OUTFILE "$line";
1295 $line="";
1296 }
1297 }
1298 }
1299 close INFILE;
1300 close OUTFILE;
1301 &util::rm("$output_filestem.text.tmp");
1302
1303 &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
1304 return 1;
1305}
1306
1307
1308# Convert any file to HTML with a crude perl implementation of the
1309# UNIX strings command.
1310
1311sub any_to_html {
1312 ($input_filename, $output_filestem) = @_;
1313
1314 # First generate a text file
1315 return 0 unless (&any_to_text($input_filename, $output_filestem));
1316
1317 # create an HTML file from the text file
1318 open(TEXT, "<$output_filestem.text");
1319 open(HTML, ">$output_filestem.html");
1320
1321 print HTML "<html><head>\n";
1322 print HTML "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html\">\n";
1323 print HTML "<META NAME=\"GENERATOR\" CONTENT=\"Greenstone any_to_html\">\n";
1324 print HTML "</head><body>\n\n";
1325
1326 my $line;
1327 while ($line=<TEXT>) {
1328 $line =~ s/</&lt;/g;
1329 $line =~ s/>/&gt;/g;
1330 if ($line =~ m/^\s*$/) {
1331 print HTML "<p>";
1332 } else {
1333 print HTML "<br> ", $line;
1334 }
1335 }
1336 print HTML "\n</body></html>\n";
1337
1338 close HTML;
1339 close TEXT;
1340
1341 &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
1342 return 1;
1343}
1344
1345# Convert any file to TEXT with a crude perl implementation of the
1346# UNIX strings command.
1347# Note - this assumes ascii charsets :( (jrm21)
1348
1349sub any_to_text {
1350 ($input_filename, $output_filestem) = @_;
1351
1352 if (!$use_strings) {
1353 return 0;
1354 }
1355
1356 print STDERR "\n**** In any to text****\n\n";
1357 open(IN, "<$input_filename") || return 0;
1358 binmode(IN);
1359 open(OUT, ">$output_filestem.text") || return 0;
1360
1361 my ($line);
1362 my $output_line_count = 0;
1363 while (<IN>) {
1364 $line = $_;
1365
1366 # delete anything that isn't a printable character
1367 $line =~ s/[^\040-\176]+/\n/sg;
1368
1369 # delete any string less than 10 characters long
1370 $line =~ s/^.{0,9}$/\n/mg;
1371 while ($line =~ m/^.{1,9}$/m) {
1372 $line =~ s/^.{0,9}$/\n/mg;
1373 $line =~ s/\n+/\n/sg;
1374 }
1375
1376 # remove extraneous whitespace
1377 $line =~ s/\n+/\n/gs;
1378 $line =~ s/^\n//gs;
1379
1380 # output whatever is left
1381 if ($line =~ m/[^\n ]/) {
1382 print OUT $line;
1383 ++$output_line_count;
1384 }
1385 }
1386
1387 close OUT;
1388 close IN;
1389
1390 if ($output_line_count) { # try to protect against binary only formats
1391 return 1;
1392 }
1393
1394 &util::rm("$output_filestem.text");
1395 return 0;
1396
1397}
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