File:
[LON-CAPA] /
loncom /
metadata_database /
searchcat.pl
Revision
1.78:
download - view:
text,
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select for diffs
Fri Mar 26 13:29:31 2010 UTC (14 years, 6 months ago) by
raeburn
Branches:
MAIN
CVS tags:
version_2_9_X,
version_2_9_1,
version_2_9_0,
version_2_8_99_1,
version_2_10_X,
version_2_10_1,
version_2_10_0_RC2,
version_2_10_0_RC1,
version_2_10_0,
loncapaMITrelate_1,
language_hyphenation_merge,
language_hyphenation,
PRINT_INCOMPLETE_base,
PRINT_INCOMPLETE,
HEAD,
BZ4492-merge,
BZ4492-feature_horizontal_radioresponse
- When populating allusers table:
- Use hash of courseIDs from single call to lonnet::courseiddump() for domain, instead of individual call to lonnet::is_course() to test if user is a course.
- Check if directory in lonUsers/$dom/$1/$2/$3/$uname is for a user
by testing for existence of passwd file.
1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # searchcat.pl "Search Catalog" batch script
4: #
5: # $Id: searchcat.pl,v 1.78 2010/03/26 13:29:31 raeburn Exp $
6: #
7: # Copyright Michigan State University Board of Trustees
8: #
9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
10: #
11: # LON-CAPA is free software; you can redistribute it and/or modify
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: #
16: # LON-CAPA is distributed in the hope that it will be useful,
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
22: # along with LON-CAPA; if not, write to the Free Software
23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24: #
25: # /home/httpd/html/adm/gpl.txt
26: #
27: # http://www.lon-capa.org/
28: #
29: ###
30:
31: =pod
32:
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'
59: F<nohist_resevaldata.db> database file in order to store it in MySQL.
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
66:
67: use strict;
68: use DBI;
69: use lib '/home/httpd/lib/perl/';
70: use LONCAPA::lonmetadata;
71: use LONCAPA;
72: use Getopt::Long;
73: use IO::File;
74: use HTML::TokeParser;
75: use GDBM_File;
76: use POSIX qw(strftime mktime);
77:
78: use Apache::lonnet();
79:
80: use File::Find;
81:
82: #
83: # Set up configuration options
84: my ($simulate,$oneuser,$help,$verbose,$logfile,$debug);
85: GetOptions (
86: 'help' => \$help,
87: 'simulate' => \$simulate,
88: 'only=s' => \$oneuser,
89: 'verbose=s' => \$verbose,
90: 'debug' => \$debug,
91: );
92:
93: if ($help) {
94: print <<"ENDHELP";
95: $0
96: Rebuild and update the LON-CAPA metadata database.
97: Options:
98: -help Print this help
99: -simulate Do not modify the database.
100: -only=user Only compute for the given user. Implies -simulate
101: -verbose=val Sets logging level, val must be a number
102: -debug Turns on debugging output
103: ENDHELP
104: exit 0;
105: }
106:
107: if (! defined($debug)) {
108: $debug = 0;
109: }
110:
111: if (! defined($verbose)) {
112: $verbose = 0;
113: }
114:
115: if (defined($oneuser)) {
116: $simulate=1;
117: }
118:
119: ##
120: ## Use variables for table names so we can test this routine a little easier
121: my %oldnames = (
122: 'metadata' => 'metadata',
123: 'portfolio' => 'portfolio_metadata',
124: 'access' => 'portfolio_access',
125: 'addedfields' => 'portfolio_addedfields',
126: 'allusers' => 'allusers',
127: );
128:
129: my %newnames;
130: # new table names - append pid to have unique temporary tables
131: foreach my $key (keys(%oldnames)) {
132: $newnames{$key} = 'new'.$oldnames{$key}.$$;
133: }
134:
135: #
136: # Only run if machine is a library server
137: exit if ($Apache::lonnet::perlvar{'lonRole'} ne 'library');
138: my $hostid = $Apache::lonnet::perlvar{'lonHostID'};
139:
140: #
141: # Make sure this process is running from user=www
142: my $wwwid=getpwnam('www');
143: if ($wwwid!=$<) {
144: my $emailto="$Apache::lonnet::perlvar{'lonAdmEMail'},$Apache::lonnet::perlvar{'lonSysEMail'}";
145: my $subj="LON: $Apache::lonnet::perlvar{'lonHostID'} User ID mismatch";
146: system("echo 'User ID mismatch. searchcat.pl must be run as user www.' |\
147: mail -s '$subj' $emailto > /dev/null");
148: exit 1;
149: }
150: #
151: # Let people know we are running
152: open(LOG,'>>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/logs/searchcat.log');
153: &log(0,'==== Searchcat Run '.localtime()."====");
154:
155:
156: if ($debug) {
157: &log(0,'simulating') if ($simulate);
158: &log(0,'only processing user '.$oneuser) if ($oneuser);
159: &log(0,'verbosity level = '.$verbose);
160: }
161: #
162: # Connect to database
163: my $dbh;
164: if (! ($dbh = DBI->connect("DBI:mysql:loncapa","www",$Apache::lonnet::perlvar{'lonSqlAccess'},
165: { RaiseError =>0,PrintError=>0}))) {
166: &log(0,"Cannot connect to database!");
167: die "MySQL Error: Cannot connect to database!\n";
168: }
169: # This can return an error and still be okay, so we do not bother checking.
170: # (perhaps it should be more robust and check for specific errors)
171: foreach my $key (keys(%newnames)) {
172: if ($newnames{$key} ne '') {
173: $dbh->do('DROP TABLE IF EXISTS '.$newnames{$key});
174: }
175: }
176:
177: #
178: # Create the new metadata, portfolio and allusers tables
179: foreach my $key (keys(%newnames)) {
180: if ($newnames{$key} ne '') {
181: my $request =
182: &LONCAPA::lonmetadata::create_metadata_storage($newnames{$key},$oldnames{$key});
183: $dbh->do($request);
184: if ($dbh->err) {
185: $dbh->disconnect();
186: &log(0,"MySQL Error Create: ".$dbh->errstr);
187: die $dbh->errstr;
188: }
189: }
190: }
191:
192: #
193: # find out which users we need to examine
194: my @domains = sort(&Apache::lonnet::current_machine_domains());
195: &log(9,'domains ="'.join('","',@domains).'"');
196:
197: foreach my $dom (@domains) {
198: &log(9,'domain = '.$dom);
199: opendir(RESOURCES,"$Apache::lonnet::perlvar{'lonDocRoot'}/res/$dom");
200: my @homeusers =
201: grep {
202: &ishome("$Apache::lonnet::perlvar{'lonDocRoot'}/res/$dom/$_");
203: } grep {
204: !/^\.\.?$/;
205: } readdir(RESOURCES);
206: closedir RESOURCES;
207: &log(5,'users = '.$dom.':'.join(',',@homeusers));
208: #
209: if ($oneuser) {
210: @homeusers=($oneuser);
211: }
212: #
213: # Loop through the users
214: foreach my $user (@homeusers) {
215: &log(0,"=== User: ".$user);
216: &process_dynamic_metadata($user,$dom);
217: #
218: # Use File::Find to get the files we need to read/modify
219: find(
220: {preprocess => \&only_meta_files,
221: #wanted => \&print_filename,
222: #wanted => \&log_metadata,
223: wanted => \&process_meta_file,
224: no_chdir => 1,
225: }, join('/',($Apache::lonnet::perlvar{'lonDocRoot'},'res',$dom,$user)) );
226: }
227: # Search for all users and public portfolio files
228: my (%allusers,%portusers,%courses);
229: if ($oneuser) {
230: %portusers = (
231: $oneuser => '',
232: );
233: %allusers = (
234: $oneuser => '',
235: );
236: %courses = &courseiddump($dom,'.',1,'.','.',$oneuser,undef,
237: undef,'.');
238: } else {
239: # get courseIDs for domain on current machine
240: %courses=&Apache::lonnet::courseiddump($dom,'.',1,'.','.','.',1,[$hostid],'.');
241: my $dir = $Apache::lonnet::perlvar{lonUsersDir}.'/'.$dom;
242: &descend_tree($dom,$dir,0,\%portusers,\%allusers);
243: }
244: foreach my $uname (keys(%portusers)) {
245: my $urlstart = '/uploaded/'.$dom.'/'.$uname;
246: my $pathstart = &propath($dom,$uname).'/userfiles';
247: my $is_course = '';
248: if (exists($courses{$dom.'_'.$uname})) {
249: $is_course = 1;
250: }
251: my $curr_perm = &Apache::lonnet::get_portfile_permissions($dom,$uname);
252: my %access = &Apache::lonnet::get_access_controls($curr_perm);
253: foreach my $file (keys(%access)) {
254: my ($group,$url,$fullpath);
255: if ($is_course) {
256: ($group, my ($path)) = ($file =~ /^(\w+)(\/.+)$/);
257: $fullpath = $pathstart.'/groups/'.$group.'/portfolio'.$path;
258: $url = $urlstart.'/groups/'.$group.'/portfolio'.$path;
259: } else {
260: $fullpath = $pathstart.'/portfolio'.$file;
261: $url = $urlstart.'/portfolio'.$file;
262: }
263: if (ref($access{$file}) eq 'HASH') {
264: my %portaccesslog =
265: &LONCAPA::lonmetadata::process_portfolio_access_data($dbh,
266: $simulate,\%newnames,$url,$fullpath,$access{$file});
267: &portfolio_logging(%portaccesslog);
268: }
269: my %portmetalog = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,$simulate,\%newnames,$url,$fullpath,$is_course,$dom,$uname,$group);
270: &portfolio_logging(%portmetalog);
271: }
272: }
273: # Update allusers
274: foreach my $uname (keys(%allusers)) {
275: next if (exists($courses{$dom.'_'.$uname}));
276: my %userdata =
277: &Apache::lonnet::get('environment',['firstname','lastname',
278: 'middlename','generation','id','permanentemail'],$dom,$uname);
279: $userdata{'username'} = $uname;
280: $userdata{'domain'} = $dom;
281: my %alluserslog =
282: &LONCAPA::lonmetadata::process_allusers_data($dbh,$simulate,
283: \%newnames,$uname,$dom,\%userdata);
284: foreach my $item (keys(%alluserslog)) {
285: &log(0,$alluserslog{$item});
286: }
287: }
288: }
289:
290: #
291: # Rename the tables
292: if (! $simulate) {
293: foreach my $key (keys(%oldnames)) {
294: if (($oldnames{$key} ne '') && ($newnames{$key} ne '')) {
295: $dbh->do('DROP TABLE IF EXISTS '.$oldnames{$key});
296: if (! $dbh->do('RENAME TABLE '.$newnames{$key}.' TO '.$oldnames{$key})) {
297: &log(0,"MySQL Error Rename: ".$dbh->errstr);
298: die $dbh->errstr;
299: } else {
300: &log(1,"MySQL table rename successful for $key.");
301: }
302: }
303: }
304: }
305: if (! $dbh->disconnect) {
306: &log(0,"MySQL Error Disconnect: ".$dbh->errstr);
307: die $dbh->errstr;
308: }
309: ##
310: ## Finished!
311: &log(0,"==== Searchcat completed ".localtime()." ====");
312: close(LOG);
313:
314: &write_type_count();
315: &write_copyright_count();
316:
317: exit 0;
318:
319: ##
320: ## Status logging routine. Inputs: $level, $message
321: ##
322: ## $level 0 should be used for normal output and error messages
323: ##
324: ## $message does not need to end with \n. In the case of errors
325: ## the message should contain as much information as possible to
326: ## help in diagnosing the problem.
327: ##
328: sub log {
329: my ($level,$message)=@_;
330: $level = 0 if (! defined($level));
331: if ($verbose >= $level) {
332: print LOG $message.$/;
333: }
334: }
335:
336: sub portfolio_logging {
337: my (%portlog) = @_;
338: foreach my $key (keys(%portlog)) {
339: if (ref($portlog{$key}) eq 'HASH') {
340: foreach my $item (keys(%{$portlog{$key}})) {
341: &log(0,$portlog{$key}{$item});
342: }
343: }
344: }
345: }
346:
347: sub descend_tree {
348: my ($dom,$dir,$depth,$allportusers,$alldomusers) = @_;
349: if (-d $dir) {
350: opendir(DIR,$dir);
351: my @contents = grep(!/^\./,readdir(DIR));
352: closedir(DIR);
353: $depth ++;
354: foreach my $item (@contents) {
355: if ($depth < 4) {
356: &descend_tree($dom,$dir.'/'.$item,$depth,$allportusers,$alldomusers);
357: } else {
358: if (-e $dir.'/'.$item.'/file_permissions.db') {
359: $$allportusers{$item} = '';
360: }
361: if (-e $dir.'/'.$item.'/passwd') {
362: $$alldomusers{$item} = '';
363: }
364: }
365: }
366: }
367: }
368:
369: ########################################################
370: ########################################################
371: ### ###
372: ### File::Find support routines ###
373: ### ###
374: ########################################################
375: ########################################################
376: ##
377: ## &only_meta_files
378: ##
379: ## Called by File::Find.
380: ## Takes a list of files/directories in and returns a list of files/directories
381: ## to search.
382: sub only_meta_files {
383: my @PossibleFiles = @_;
384: my @ChosenFiles;
385: foreach my $file (@PossibleFiles) {
386: if ( ($file =~ /\.meta$/ && # Ends in meta
387: $file !~ /\.\d+\.[^\.]+\.meta$/ # is not for a prior version
388: ) || (-d $File::Find::dir."/".$file )) { # directories are okay
389: # but we do not want /. or /..
390: push(@ChosenFiles,$file);
391: }
392: }
393: return @ChosenFiles;
394: }
395:
396: ##
397: ##
398: ## Debugging routines, use these for 'wanted' in the File::Find call
399: ##
400: sub print_filename {
401: my ($file) = $_;
402: my $fullfilename = $File::Find::name;
403: if ($debug) {
404: if (-d $file) {
405: &log(5," Got directory ".$fullfilename);
406: } else {
407: &log(5," Got file ".$fullfilename);
408: }
409: }
410: $_=$file;
411: }
412:
413: sub log_metadata {
414: my ($file) = $_;
415: my $fullfilename = $File::Find::name;
416: return if (-d $fullfilename); # No need to do anything here for directories
417: if ($debug) {
418: &log(6,$fullfilename);
419: my $ref = &metadata($fullfilename);
420: if (! defined($ref)) {
421: &log(6," No data");
422: return;
423: }
424: while (my($key,$value) = each(%$ref)) {
425: &log(6," ".$key." => ".$value);
426: }
427: &count_copyright($ref->{'copyright'});
428: }
429: $_=$file;
430: }
431:
432: ##
433: ## process_meta_file
434: ## Called by File::Find.
435: ## Only input is the filename in $_.
436: sub process_meta_file {
437: my ($file) = $_;
438: my $filename = $File::Find::name; # full filename
439: return if (-d $filename); # No need to do anything here for directories
440: #
441: &log(3,$filename) if ($debug);
442: #
443: my $ref = &metadata($filename);
444: #
445: # $url is the original file url, not the metadata file
446: my $target = $filename;
447: $target =~ s/\.meta$//;
448: my $url='/res/'.&declutter($target);
449: &log(3," ".$url) if ($debug);
450: #
451: # Ignore some files based on their metadata
452: if ($ref->{'obsolete'}) {
453: &log(3,"obsolete") if ($debug);
454: return;
455: }
456: &count_copyright($ref->{'copyright'});
457: if ($ref->{'copyright'} eq 'private') {
458: &log(3,"private") if ($debug);
459: return;
460: }
461: #
462: # Find the dynamic metadata
463: my %dyn;
464: if ($url=~ m:/default$:) {
465: $url=~ s:/default$:/:;
466: &log(3,"Skipping dynamic data") if ($debug);
467: } else {
468: &log(3,"Retrieving dynamic data") if ($debug);
469: %dyn=&get_dynamic_metadata($url);
470: &count_type($url);
471: }
472: &LONCAPA::lonmetadata::getfiledates($ref,$target);
473: #
474: my %Data = (
475: %$ref,
476: %dyn,
477: 'url'=>$url,
478: 'version'=>'current');
479: if (! $simulate) {
480: my ($count,$err) =
481: &LONCAPA::lonmetadata::store_metadata($dbh,$newnames{'metadata'},
482: 'metadata',\%Data);
483: if ($err) {
484: &log(0,"MySQL Error Insert: ".$err);
485: }
486: if ($count < 1) {
487: &log(0,"Unable to insert record into MySQL database for $url");
488: }
489: }
490: #
491: # Reset $_ before leaving
492: $_ = $file;
493: }
494:
495: ########################################################
496: ########################################################
497: ### ###
498: ### &metadata($uri) ###
499: ### Retrieve metadata for the given file ###
500: ### ###
501: ########################################################
502: ########################################################
503: sub metadata {
504: my ($uri) = @_;
505: my %metacache=();
506: $uri=&declutter($uri);
507: my $filename=$uri;
508: $uri=~s/\.meta$//;
509: $uri='';
510: if ($filename !~ /\.meta$/) {
511: $filename.='.meta';
512: }
513: my $metastring =
514: &LONCAPA::lonmetadata::getfile($Apache::lonnet::perlvar{'lonDocRoot'}.'/res/'.$filename);
515: return undef if (! defined($metastring));
516: my $parser=HTML::TokeParser->new(\$metastring);
517: my $token;
518: while ($token=$parser->get_token) {
519: if ($token->[0] eq 'S') {
520: my $entry=$token->[1];
521: my $unikey=$entry;
522: if (defined($token->[2]->{'part'})) {
523: $unikey.='_'.$token->[2]->{'part'};
524: }
525: if (defined($token->[2]->{'name'})) {
526: $unikey.='_'.$token->[2]->{'name'};
527: }
528: if ($metacache{$uri.'keys'}) {
529: $metacache{$uri.'keys'}.=','.$unikey;
530: } else {
531: $metacache{$uri.'keys'}=$unikey;
532: }
533: foreach ( @{$token->[3]}) {
534: $metacache{$uri.''.$unikey.'.'.$_}=$token->[2]->{$_};
535: }
536: if (! ($metacache{$uri.''.$unikey}=$parser->get_text('/'.$entry))){
537: $metacache{$uri.''.$unikey} =
538: $metacache{$uri.''.$unikey.'.default'};
539: }
540: } # End of ($token->[0] eq 'S')
541: }
542: return \%metacache;
543: }
544:
545: ########################################################
546: ########################################################
547: ### ###
548: ### Dynamic Metadata ###
549: ### ###
550: ########################################################
551: ########################################################
552: ##
553: ## Dynamic metadata description (incomplete)
554: ##
555: ## For a full description of all fields,
556: ## see LONCAPA::lonmetadata
557: ##
558: ## Field Type
559: ##-----------------------------------------------------------
560: ## count integer
561: ## course integer
562: ## course_list comma separated list of course ids
563: ## avetries real
564: ## avetries_list comma separated list of real numbers
565: ## stdno real
566: ## stdno_list comma separated list of real numbers
567: ## usage integer
568: ## usage_list comma separated list of resources
569: ## goto scalar
570: ## goto_list comma separated list of resources
571: ## comefrom scalar
572: ## comefrom_list comma separated list of resources
573: ## difficulty real
574: ## difficulty_list comma separated list of real numbers
575: ## sequsage scalar
576: ## sequsage_list comma separated list of resources
577: ## clear real
578: ## technical real
579: ## correct real
580: ## helpful real
581: ## depth real
582: ## comments html of all the comments made
583: ##
584: {
585:
586: my %DynamicData;
587: my %Counts;
588:
589: sub process_dynamic_metadata {
590: my ($user,$dom) = @_;
591: undef(%DynamicData);
592: undef(%Counts);
593: #
594: my $prodir = &propath($dom,$user);
595: #
596: # Read in the dynamic metadata
597: my %evaldata;
598: if (! tie(%evaldata,'GDBM_File',
599: $prodir.'/nohist_resevaldata.db',&GDBM_READER(),0640)) {
600: return 0;
601: }
602: #
603: %DynamicData = &LONCAPA::lonmetadata::process_reseval_data(\%evaldata);
604: untie(%evaldata);
605: $DynamicData{'domain'} = $dom;
606: #print('user = '.$user.' domain = '.$dom.$/);
607: #
608: # Read in the access count data
609: &log(7,'Reading access count data') if ($debug);
610: my %countdata;
611: if (! tie(%countdata,'GDBM_File',
612: $prodir.'/nohist_accesscount.db',&GDBM_READER(),0640)) {
613: return 0;
614: }
615: while (my ($key,$count) = each(%countdata)) {
616: next if ($key !~ /^$dom/);
617: $key = &unescape($key);
618: &log(8,' Count '.$key.' = '.$count) if ($debug);
619: $Counts{$key}=$count;
620: }
621: untie(%countdata);
622: if ($debug) {
623: &log(7,scalar(keys(%Counts)).
624: " Counts read for ".$user."@".$dom);
625: &log(7,scalar(keys(%DynamicData)).
626: " Dynamic metadata read for ".$user."@".$dom);
627: }
628: #
629: return 1;
630: }
631:
632: sub get_dynamic_metadata {
633: my ($url) = @_;
634: $url =~ s:^/res/::;
635: my %data = &LONCAPA::lonmetadata::process_dynamic_metadata($url,
636: \%DynamicData);
637: # find the count
638: $data{'count'} = $Counts{$url};
639: #
640: # Log the dynamic metadata
641: if ($debug) {
642: while (my($k,$v)=each(%data)) {
643: &log(8," ".$k." => ".$v);
644: }
645: }
646: return %data;
647: }
648:
649: } # End of %DynamicData and %Counts scope
650:
651: ########################################################
652: ########################################################
653: ### ###
654: ### Counts ###
655: ### ###
656: ########################################################
657: ########################################################
658: {
659:
660: my %countext;
661:
662: sub count_type {
663: my $file=shift;
664: $file=~/\.(\w+)$/;
665: my $ext=lc($1);
666: $countext{$ext}++;
667: }
668:
669: sub write_type_count {
670: open(RESCOUNT,'>/home/httpd/html/lon-status/rescount.txt');
671: while (my ($extension,$count) = each(%countext)) {
672: print RESCOUNT $extension.'='.$count.'&';
673: }
674: print RESCOUNT 'time='.time."\n";
675: close(RESCOUNT);
676: }
677:
678: } # end of scope for %countext
679:
680: {
681:
682: my %copyrights;
683:
684: sub count_copyright {
685: $copyrights{@_[0]}++;
686: }
687:
688: sub write_copyright_count {
689: open(COPYCOUNT,'>/home/httpd/html/lon-status/copyrightcount.txt');
690: while (my ($copyright,$count) = each(%copyrights)) {
691: print COPYCOUNT $copyright.'='.$count.'&';
692: }
693: print COPYCOUNT 'time='.time."\n";
694: close(COPYCOUNT);
695: }
696:
697: } # end of scope for %copyrights
698:
699: ########################################################
700: ########################################################
701: ### ###
702: ### Miscellanous Utility Routines ###
703: ### ###
704: ########################################################
705: ########################################################
706: ##
707: ## &ishome($username)
708: ## Returns 1 if $username is a LON-CAPA author, 0 otherwise
709: ## (copied from lond, modification of the return value)
710: sub ishome {
711: my $author=shift;
712: $author=~s{/home/httpd/html/res/([^/]*)/([^/]*).*}{$1/$2};
713: my ($udom,$uname)=split(/\//,$author);
714: my $proname=propath($udom,$uname);
715: if (-e $proname) {
716: return 1;
717: } else {
718: return 0;
719: }
720: }
721:
722: ##
723: ## &declutter($filename)
724: ## Given a filename, returns a url for the filename.
725: sub declutter {
726: my $thisfn=shift;
727: $thisfn=~s/^$Apache::lonnet::perlvar{'lonDocRoot'}//;
728: $thisfn=~s/^\///;
729: $thisfn=~s/^res\///;
730: return $thisfn;
731: }
732:
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