Annotation of loncom/metadata_database/searchcat.pl, revision 1.66
1.1 harris41 1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # searchcat.pl "Search Catalog" batch script
1.16 harris41 4: #
1.66 ! albertel 5: # $Id: searchcat.pl,v 1.65 2006/01/27 15:25:05 albertel Exp $
1.16 harris41 6: #
7: # Copyright Michigan State University Board of Trustees
8: #
1.29 albertel 9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
1.16 harris41 10: #
1.29 albertel 11: # LON-CAPA is free software; you can redistribute it and/or modify
1.16 harris41 12: # it under the terms of the GNU General Public License as published by
13: # the Free Software Foundation; either version 2 of the License, or
14: # (at your option) any later version.
15: #
1.29 albertel 16: # LON-CAPA is distributed in the hope that it will be useful,
1.16 harris41 17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19: # GNU General Public License for more details.
20: #
21: # You should have received a copy of the GNU General Public License
1.29 albertel 22: # along with LON-CAPA; if not, write to the Free Software
1.16 harris41 23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
1.29 albertel 27: # http://www.lon-capa.org/
1.16 harris41 28: #
29: ###
1.33 matthew 30:
1.32 www 31: =pod
1.1 harris41 32:
1.32 www 33: =head1 NAME
34:
35: B<searchcat.pl> - put authoritative filesystem data into sql database.
36:
37: =head1 SYNOPSIS
38:
39: Ordinarily this script is to be called from a loncapa cron job
40: (CVS source location: F<loncapa/loncom/cron/loncapa>; typical
41: filesystem installation location: F</etc/cron.d/loncapa>).
42:
43: Here is the cron job entry.
44:
45: C<# Repopulate and refresh the metadata database used for the search catalog.>
46: C<10 1 * * 7 www /home/httpd/perl/searchcat.pl>
47:
48: This script only allows itself to be run as the user C<www>.
49:
50: =head1 DESCRIPTION
51:
52: This script goes through a loncapa resource directory and gathers metadata.
53: The metadata is entered into a SQL database.
54:
55: This script also does general database maintenance such as reformatting
56: the C<loncapa:metadata> table if it is deprecated.
57:
58: This script evaluates dynamic metadata from the authors'
1.48 www 59: F<nohist_resevaldata.db> database file in order to store it in MySQL.
1.32 www 60:
61: This script is playing an increasingly important role for a loncapa
62: library server. The proper operation of this script is critical for a smooth
63: and correct user experience.
64:
65: =cut
1.1 harris41 66:
1.45 www 67: use strict;
1.65 albertel 68: BEGIN {
69: eval "use Apache2::compat();";
70: };
1.55 matthew 71: use DBI;
1.17 harris41 72: use lib '/home/httpd/lib/perl/';
1.55 matthew 73: use LONCAPA::lonmetadata;
1.17 harris41 74:
1.56 matthew 75: use Getopt::Long;
1.1 harris41 76: use IO::File;
77: use HTML::TokeParser;
1.21 www 78: use GDBM_File;
1.24 www 79: use POSIX qw(strftime mktime);
1.56 matthew 80:
1.63 matthew 81: use Apache::lonnet();
1.62 matthew 82:
1.55 matthew 83: use File::Find;
1.1 harris41 84:
1.56 matthew 85: #
86: # Set up configuration options
1.63 matthew 87: my ($simulate,$oneuser,$help,$verbose,$logfile,$debug);
1.56 matthew 88: GetOptions (
89: 'help' => \$help,
90: 'simulate' => \$simulate,
91: 'only=s' => \$oneuser,
92: 'verbose=s' => \$verbose,
93: 'debug' => \$debug,
94: );
95:
96: if ($help) {
97: print <<"ENDHELP";
98: $0
99: Rebuild and update the LON-CAPA metadata database.
100: Options:
101: -help Print this help
102: -simulate Do not modify the database.
103: -only=user Only compute for the given user. Implies -simulate
104: -verbose=val Sets logging level, val must be a number
105: -debug Turns on debugging output
106: ENDHELP
107: exit 0;
108: }
109:
110: if (! defined($debug)) {
111: $debug = 0;
112: }
113:
114: if (! defined($verbose)) {
115: $verbose = 0;
116: }
117:
118: if (defined($oneuser)) {
119: $simulate=1;
120: }
121:
1.55 matthew 122: ##
123: ## Use variables for table names so we can test this routine a little easier
124: my $oldname = 'metadata';
1.59 matthew 125: my $newname = 'newmetadata'.$$; # append pid to have unique temporary table
1.45 www 126:
1.55 matthew 127: #
128: # Only run if machine is a library server
1.63 matthew 129: exit if ($Apache::lonnet::perlvar{'lonRole'} ne 'library');
1.55 matthew 130: #
131: # Make sure this process is running from user=www
132: my $wwwid=getpwnam('www');
133: if ($wwwid!=$<) {
1.63 matthew 134: my $emailto="$Apache::lonnet::perlvar{'lonAdmEMail'},$Apache::lonnet::perlvar{'lonSysEMail'}";
135: my $subj="LON: $Apache::lonnet::perlvar{'lonHostID'} User ID mismatch";
1.55 matthew 136: system("echo 'User ID mismatch. searchcat.pl must be run as user www.' |\
1.63 matthew 137: mail -s '$subj' $emailto > /dev/null");
1.55 matthew 138: exit 1;
139: }
140: #
141: # Let people know we are running
1.63 matthew 142: open(LOG,'>>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/logs/searchcat.log');
1.56 matthew 143: &log(0,'==== Searchcat Run '.localtime()."====");
1.57 matthew 144:
145:
1.56 matthew 146: if ($debug) {
147: &log(0,'simulating') if ($simulate);
148: &log(0,'only processing user '.$oneuser) if ($oneuser);
149: &log(0,'verbosity level = '.$verbose);
150: }
1.55 matthew 151: #
152: # Connect to database
153: my $dbh;
1.63 matthew 154: if (! ($dbh = DBI->connect("DBI:mysql:loncapa","www",$Apache::lonnet::perlvar{'lonSqlAccess'},
1.55 matthew 155: { RaiseError =>0,PrintError=>0}))) {
1.56 matthew 156: &log(0,"Cannot connect to database!");
1.55 matthew 157: die "MySQL Error: Cannot connect to database!\n";
158: }
159: # This can return an error and still be okay, so we do not bother checking.
160: # (perhaps it should be more robust and check for specific errors)
161: $dbh->do('DROP TABLE IF EXISTS '.$newname);
162: #
163: # Create the new table
164: my $request = &LONCAPA::lonmetadata::create_metadata_storage($newname);
165: $dbh->do($request);
166: if ($dbh->err) {
167: $dbh->disconnect();
1.56 matthew 168: &log(0,"MySQL Error Create: ".$dbh->errstr);
1.55 matthew 169: die $dbh->errstr;
170: }
171: #
172: # find out which users we need to examine
1.63 matthew 173: my @domains = sort(&Apache::lonnet::current_machine_domains());
174: &log(9,'domains ="'.join('","',@domains).'"');
1.62 matthew 175:
176: foreach my $dom (@domains) {
177: &log(9,'domain = '.$dom);
1.63 matthew 178: opendir(RESOURCES,"$Apache::lonnet::perlvar{'lonDocRoot'}/res/$dom");
1.62 matthew 179: my @homeusers =
180: grep {
1.63 matthew 181: &ishome("$Apache::lonnet::perlvar{'lonDocRoot'}/res/$dom/$_");
1.62 matthew 182: } grep {
183: !/^\.\.?$/;
184: } readdir(RESOURCES);
185: closedir RESOURCES;
186: &log(5,'users = '.$dom.':'.join(',',@homeusers));
187: #
188: if ($oneuser) {
189: @homeusers=($oneuser);
190: }
191: #
192: # Loop through the users
193: foreach my $user (@homeusers) {
194: &log(0,"=== User: ".$user);
195: &process_dynamic_metadata($user,$dom);
196: #
197: # Use File::Find to get the files we need to read/modify
198: find(
199: {preprocess => \&only_meta_files,
200: #wanted => \&print_filename,
201: #wanted => \&log_metadata,
202: wanted => \&process_meta_file,
1.66 ! albertel 203: no_chdir => 1,
1.63 matthew 204: }, join('/',($Apache::lonnet::perlvar{'lonDocRoot'},'res',$dom,$user)) );
1.62 matthew 205: }
1.55 matthew 206: }
207: #
208: # Rename the table
1.56 matthew 209: if (! $simulate) {
210: $dbh->do('DROP TABLE IF EXISTS '.$oldname);
211: if (! $dbh->do('RENAME TABLE '.$newname.' TO '.$oldname)) {
212: &log(0,"MySQL Error Rename: ".$dbh->errstr);
213: die $dbh->errstr;
214: } else {
215: &log(1,"MySQL table rename successful.");
216: }
1.55 matthew 217: }
218: if (! $dbh->disconnect) {
1.56 matthew 219: &log(0,"MySQL Error Disconnect: ".$dbh->errstr);
1.55 matthew 220: die $dbh->errstr;
221: }
222: ##
223: ## Finished!
1.56 matthew 224: &log(0,"==== Searchcat completed ".localtime()." ====");
1.55 matthew 225: close(LOG);
1.21 www 226:
1.55 matthew 227: &write_type_count();
228: &write_copyright_count();
1.36 www 229:
1.55 matthew 230: exit 0;
1.28 harris41 231:
1.56 matthew 232: ##
233: ## Status logging routine. Inputs: $level, $message
234: ##
235: ## $level 0 should be used for normal output and error messages
236: ##
237: ## $message does not need to end with \n. In the case of errors
238: ## the message should contain as much information as possible to
239: ## help in diagnosing the problem.
240: ##
241: sub log {
242: my ($level,$message)=@_;
243: $level = 0 if (! defined($level));
244: if ($verbose >= $level) {
245: print LOG $message.$/;
246: }
247: }
248:
1.55 matthew 249: ########################################################
250: ########################################################
251: ### ###
252: ### File::Find support routines ###
253: ### ###
254: ########################################################
255: ########################################################
256: ##
257: ## &only_meta_files
258: ##
259: ## Called by File::Find.
260: ## Takes a list of files/directories in and returns a list of files/directories
261: ## to search.
262: sub only_meta_files {
263: my @PossibleFiles = @_;
264: my @ChosenFiles;
265: foreach my $file (@PossibleFiles) {
266: if ( ($file =~ /\.meta$/ && # Ends in meta
267: $file !~ /\.\d+\.[^\.]+\.meta$/ # is not for a prior version
268: ) || (-d $file )) { # directories are okay
269: # but we do not want /. or /..
270: push(@ChosenFiles,$file);
271: }
1.38 www 272: }
1.55 matthew 273: return @ChosenFiles;
1.38 www 274: }
275:
1.55 matthew 276: ##
277: ##
278: ## Debugging routines, use these for 'wanted' in the File::Find call
279: ##
280: sub print_filename {
281: my ($file) = $_;
282: my $fullfilename = $File::Find::name;
1.56 matthew 283: if ($debug) {
284: if (-d $file) {
285: &log(5," Got directory ".$fullfilename);
286: } else {
287: &log(5," Got file ".$fullfilename);
288: }
1.38 www 289: }
1.55 matthew 290: $_=$file;
1.38 www 291: }
1.28 harris41 292:
1.55 matthew 293: sub log_metadata {
294: my ($file) = $_;
295: my $fullfilename = $File::Find::name;
296: return if (-d $fullfilename); # No need to do anything here for directories
1.56 matthew 297: if ($debug) {
298: &log(6,$fullfilename);
299: my $ref=&metadata($fullfilename);
300: if (! defined($ref)) {
301: &log(6," No data");
302: return;
303: }
304: while (my($key,$value) = each(%$ref)) {
305: &log(6," ".$key." => ".$value);
306: }
307: &count_copyright($ref->{'copyright'});
1.55 matthew 308: }
309: $_=$file;
1.31 harris41 310: }
1.21 www 311:
1.55 matthew 312: ##
313: ## process_meta_file
314: ## Called by File::Find.
315: ## Only input is the filename in $_.
316: sub process_meta_file {
317: my ($file) = $_;
1.56 matthew 318: my $filename = $File::Find::name; # full filename
1.55 matthew 319: return if (-d $filename); # No need to do anything here for directories
320: #
1.56 matthew 321: &log(3,$filename) if ($debug);
1.55 matthew 322: #
323: my $ref=&metadata($filename);
324: #
325: # $url is the original file url, not the metadata file
1.61 matthew 326: my $target = $filename;
327: $target =~ s/\.meta$//;
328: my $url='/res/'.&declutter($target);
1.56 matthew 329: &log(3," ".$url) if ($debug);
1.55 matthew 330: #
331: # Ignore some files based on their metadata
332: if ($ref->{'obsolete'}) {
1.56 matthew 333: &log(3,"obsolete") if ($debug);
1.55 matthew 334: return;
335: }
336: &count_copyright($ref->{'copyright'});
337: if ($ref->{'copyright'} eq 'private') {
1.56 matthew 338: &log(3,"private") if ($debug);
1.55 matthew 339: return;
340: }
341: #
342: # Find the dynamic metadata
343: my %dyn;
344: if ($url=~ m:/default$:) {
345: $url=~ s:/default$:/:;
1.56 matthew 346: &log(3,"Skipping dynamic data") if ($debug);
1.55 matthew 347: } else {
1.56 matthew 348: &log(3,"Retrieving dynamic data") if ($debug);
349: %dyn=&get_dynamic_metadata($url);
1.55 matthew 350: &count_type($url);
351: }
352: #
1.61 matthew 353: if (! defined($ref->{'creationdate'}) ||
354: $ref->{'creationdate'} =~ /^\s*$/) {
355: $ref->{'creationdate'} = (stat($target))[9];
356: }
357: if (! defined($ref->{'lastrevisiondate'}) ||
358: $ref->{'lastrevisiondate'} =~ /^\s*$/) {
359: $ref->{'lastrevisiondate'} = (stat($target))[9];
360: }
1.55 matthew 361: $ref->{'creationdate'} = &sqltime($ref->{'creationdate'});
362: $ref->{'lastrevisiondate'} = &sqltime($ref->{'lastrevisiondate'});
363: my %Data = (
364: %$ref,
365: %dyn,
366: 'url'=>$url,
367: 'version'=>'current');
1.56 matthew 368: if (! $simulate) {
369: my ($count,$err) = &LONCAPA::lonmetadata::store_metadata($dbh,$newname,
370: \%Data);
371: if ($err) {
372: &log(0,"MySQL Error Insert: ".$err);
373: }
374: if ($count < 1) {
375: &log(0,"Unable to insert record into MySQL database for $url");
376: }
1.55 matthew 377: }
378: #
379: # Reset $_ before leaving
380: $_ = $file;
381: }
382:
383: ########################################################
384: ########################################################
385: ### ###
386: ### &metadata($uri) ###
387: ### Retrieve metadata for the given file ###
388: ### ###
389: ########################################################
390: ########################################################
391: sub metadata {
392: my ($uri)=@_;
393: my %metacache=();
394: $uri=&declutter($uri);
395: my $filename=$uri;
396: $uri=~s/\.meta$//;
397: $uri='';
398: if ($filename !~ /\.meta$/) {
399: $filename.='.meta';
400: }
1.63 matthew 401: my $metastring=&getfile($Apache::lonnet::perlvar{'lonDocRoot'}.'/res/'.$filename);
1.55 matthew 402: return undef if (! defined($metastring));
403: my $parser=HTML::TokeParser->new(\$metastring);
404: my $token;
405: while ($token=$parser->get_token) {
406: if ($token->[0] eq 'S') {
407: my $entry=$token->[1];
408: my $unikey=$entry;
409: if (defined($token->[2]->{'part'})) {
410: $unikey.='_'.$token->[2]->{'part'};
411: }
412: if (defined($token->[2]->{'name'})) {
413: $unikey.='_'.$token->[2]->{'name'};
414: }
415: if ($metacache{$uri.'keys'}) {
416: $metacache{$uri.'keys'}.=','.$unikey;
417: } else {
418: $metacache{$uri.'keys'}=$unikey;
419: }
420: foreach ( @{$token->[3]}) {
421: $metacache{$uri.''.$unikey.'.'.$_}=$token->[2]->{$_};
422: }
423: if (! ($metacache{$uri.''.$unikey}=$parser->get_text('/'.$entry))){
424: $metacache{$uri.''.$unikey} =
425: $metacache{$uri.''.$unikey.'.default'};
426: }
427: } # End of ($token->[0] eq 'S')
428: }
429: return \%metacache;
1.31 harris41 430: }
1.28 harris41 431:
1.55 matthew 432: ##
433: ## &getfile($filename)
434: ## Slurps up an entire file into a scalar.
435: ## Returns undef if the file does not exist
436: sub getfile {
437: my $file = shift();
438: if (! -e $file ) {
439: return undef;
440: }
441: my $fh=IO::File->new($file);
442: my $contents = '';
443: while (<$fh>) {
444: $contents .= $_;
445: }
446: return $contents;
447: }
1.28 harris41 448:
1.55 matthew 449: ########################################################
450: ########################################################
451: ### ###
452: ### Dynamic Metadata ###
453: ### ###
454: ########################################################
455: ########################################################
1.56 matthew 456: ##
1.58 www 457: ## Dynamic metadata description (incomplete)
458: ##
459: ## For a full description of all fields,
460: ## see LONCAPA::lonmetadata
1.56 matthew 461: ##
462: ## Field Type
463: ##-----------------------------------------------------------
464: ## count integer
465: ## course integer
1.58 www 466: ## course_list comma separated list of course ids
1.56 matthew 467: ## avetries real
1.58 www 468: ## avetries_list comma separated list of real numbers
1.56 matthew 469: ## stdno real
1.58 www 470: ## stdno_list comma separated list of real numbers
1.56 matthew 471: ## usage integer
1.58 www 472: ## usage_list comma separated list of resources
1.56 matthew 473: ## goto scalar
1.58 www 474: ## goto_list comma separated list of resources
1.56 matthew 475: ## comefrom scalar
1.58 www 476: ## comefrom_list comma separated list of resources
1.56 matthew 477: ## difficulty real
1.58 www 478: ## difficulty_list comma separated list of real numbers
1.56 matthew 479: ## sequsage scalar
1.58 www 480: ## sequsage_list comma separated list of resources
1.56 matthew 481: ## clear real
482: ## technical real
483: ## correct real
484: ## helpful real
485: ## depth real
486: ## comments html of all the comments made
487: ##
488: {
489:
490: my %DynamicData;
491: my %Counts;
492:
493: sub process_dynamic_metadata {
494: my ($user,$dom) = @_;
495: undef(%DynamicData);
496: undef(%Counts);
497: #
498: my $prodir = &propath($dom,$user);
1.55 matthew 499: #
1.56 matthew 500: # Read in the dynamic metadata
1.55 matthew 501: my %evaldata;
502: if (! tie(%evaldata,'GDBM_File',
503: $prodir.'/nohist_resevaldata.db',&GDBM_READER(),0640)) {
1.56 matthew 504: return 0;
1.55 matthew 505: }
1.56 matthew 506: #
1.57 matthew 507: %DynamicData = &LONCAPA::lonmetadata::process_reseval_data(\%evaldata);
1.55 matthew 508: untie(%evaldata);
1.62 matthew 509: $DynamicData{'domain'} = $dom;
1.64 albertel 510: #print('user = '.$user.' domain = '.$dom.$/);
1.56 matthew 511: #
512: # Read in the access count data
513: &log(7,'Reading access count data') if ($debug);
514: my %countdata;
515: if (! tie(%countdata,'GDBM_File',
516: $prodir.'/nohist_accesscount.db',&GDBM_READER(),0640)) {
517: return 0;
518: }
519: while (my ($key,$count) = each(%countdata)) {
520: next if ($key !~ /^$dom/);
521: $key = &unescape($key);
522: &log(8,' Count '.$key.' = '.$count) if ($debug);
523: $Counts{$key}=$count;
524: }
525: untie(%countdata);
526: if ($debug) {
527: &log(7,scalar(keys(%Counts)).
528: " Counts read for ".$user."@".$dom);
529: &log(7,scalar(keys(%DynamicData)).
530: " Dynamic metadata read for ".$user."@".$dom);
531: }
532: #
533: return 1;
534: }
535:
536: sub get_dynamic_metadata {
537: my ($url) = @_;
538: $url =~ s:^/res/::;
1.57 matthew 539: my %data = &LONCAPA::lonmetadata::process_dynamic_metadata($url,
540: \%DynamicData);
1.56 matthew 541: # find the count
542: $data{'count'} = $Counts{$url};
543: #
544: # Log the dynamic metadata
545: if ($debug) {
546: while (my($k,$v)=each(%data)) {
547: &log(8," ".$k." => ".$v);
548: }
1.44 www 549: }
1.56 matthew 550: return %data;
1.30 www 551: }
1.28 harris41 552:
1.56 matthew 553: } # End of %DynamicData and %Counts scope
554:
1.55 matthew 555: ########################################################
556: ########################################################
557: ### ###
558: ### Counts ###
559: ### ###
560: ########################################################
561: ########################################################
562: {
1.1 harris41 563:
1.55 matthew 564: my %countext;
1.15 harris41 565:
1.55 matthew 566: sub count_type {
567: my $file=shift;
568: $file=~/\.(\w+)$/;
569: my $ext=lc($1);
570: $countext{$ext}++;
1.31 harris41 571: }
1.1 harris41 572:
1.55 matthew 573: sub write_type_count {
574: open(RESCOUNT,'>/home/httpd/html/lon-status/rescount.txt');
575: while (my ($extension,$count) = each(%countext)) {
576: print RESCOUNT $extension.'='.$count.'&';
1.47 www 577: }
1.55 matthew 578: print RESCOUNT 'time='.time."\n";
579: close(RESCOUNT);
1.31 harris41 580: }
1.27 www 581:
1.55 matthew 582: } # end of scope for %countext
1.34 matthew 583:
1.55 matthew 584: {
1.34 matthew 585:
1.55 matthew 586: my %copyrights;
1.44 www 587:
1.55 matthew 588: sub count_copyright {
589: $copyrights{@_[0]}++;
1.31 harris41 590: }
1.33 matthew 591:
1.55 matthew 592: sub write_copyright_count {
593: open(COPYCOUNT,'>/home/httpd/html/lon-status/copyrightcount.txt');
594: while (my ($copyright,$count) = each(%copyrights)) {
595: print COPYCOUNT $copyright.'='.$count.'&';
1.31 harris41 596: }
1.55 matthew 597: print COPYCOUNT 'time='.time."\n";
598: close(COPYCOUNT);
1.31 harris41 599: }
1.28 harris41 600:
1.55 matthew 601: } # end of scope for %copyrights
1.28 harris41 602:
1.55 matthew 603: ########################################################
604: ########################################################
605: ### ###
606: ### Miscellanous Utility Routines ###
607: ### ###
608: ########################################################
609: ########################################################
610: ##
611: ## &ishome($username)
612: ## Returns 1 if $username is a LON-CAPA author, 0 otherwise
613: ## (copied from lond, modification of the return value)
1.31 harris41 614: sub ishome {
615: my $author=shift;
616: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
617: my ($udom,$uname)=split(/\//,$author);
618: my $proname=propath($udom,$uname);
619: if (-e $proname) {
620: return 1;
621: } else {
622: return 0;
623: }
624: }
1.28 harris41 625:
1.55 matthew 626: ##
627: ## &propath($udom,$uname)
628: ## Returns the path to the users LON-CAPA directory
629: ## (copied from lond)
1.31 harris41 630: sub propath {
631: my ($udom,$uname)=@_;
632: $udom=~s/\W//g;
633: $uname=~s/\W//g;
634: my $subdir=$uname.'__';
635: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
1.63 matthew 636: my $proname="$Apache::lonnet::perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
1.31 harris41 637: return $proname;
638: }
1.28 harris41 639:
1.55 matthew 640: ##
641: ## &sqltime($timestamp)
642: ##
643: ## Convert perl $timestamp to MySQL time. MySQL expects YYYY-MM-DD HH:MM:SS
644: ##
1.31 harris41 645: sub sqltime {
1.55 matthew 646: my ($time) = @_;
647: my $mysqltime;
648: if ($time =~
649: /(\d+)-(\d+)-(\d+) # YYYY-MM-DD
650: \s # a space
651: (\d+):(\d+):(\d+) # HH:MM::SS
652: /x ) {
653: # Some of the .meta files have the time in mysql
654: # format already, so just make sure they are 0 padded and
655: # pass them back.
656: $mysqltime = sprintf('%04d-%02d-%02d %02d:%02d:%02d',
657: $1,$2,$3,$4,$5,$6);
658: } elsif ($time =~ /^\d+$/) {
659: my @TimeData = gmtime($time);
660: # Alter the month to be 1-12 instead of 0-11
661: $TimeData[4]++;
662: # Alter the year to be from 0 instead of from 1900
663: $TimeData[5]+=1900;
664: $mysqltime = sprintf('%04d-%02d-%02d %02d:%02d:%02d',
665: @TimeData[5,4,3,2,1,0]);
1.56 matthew 666: } elsif (! defined($time) || $time == 0) {
667: $mysqltime = 0;
1.55 matthew 668: } else {
1.56 matthew 669: &log(0," sqltime:Unable to decode time ".$time);
1.55 matthew 670: $mysqltime = 0;
671: }
672: return $mysqltime;
1.31 harris41 673: }
1.28 harris41 674:
1.55 matthew 675: ##
676: ## &declutter($filename)
677: ## Given a filename, returns a url for the filename.
678: sub declutter {
679: my $thisfn=shift;
1.63 matthew 680: $thisfn=~s/^$Apache::lonnet::perlvar{'lonDocRoot'}//;
1.55 matthew 681: $thisfn=~s/^\///;
682: $thisfn=~s/^res\///;
683: return $thisfn;
1.31 harris41 684: }
1.28 harris41 685:
1.55 matthew 686: ##
687: ## Escape / Unescape special characters
688: sub unescape {
689: my $str=shift;
690: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
691: return $str;
1.31 harris41 692: }
1.28 harris41 693:
1.55 matthew 694: sub escape {
695: my $str=shift;
696: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
697: return $str;
1.45 www 698: }
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