1: #!/usr/bin/perl
2:
3: # The LearningOnline Network
4: # lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
5: #
6: # $Id: lonsql,v 1.85 2007/08/25 13:45:56 raeburn Exp $
7: #
8: # Copyright Michigan State University Board of Trustees
9: #
10: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
11: #
12: # LON-CAPA is free software; you can redistribute it and/or modify
13: # it under the terms of the GNU General Public License as published by
14: # the Free Software Foundation; either version 2 of the License, or
15: # (at your option) any later version.
16: #
17: # LON-CAPA is distributed in the hope that it will be useful,
18: # but WITHOUT ANY WARRANTY; without even the implied warranty of
19: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20: # GNU General Public License for more details.
21: #
22: # You should have received a copy of the GNU General Public License
23: # along with LON-CAPA; if not, write to the Free Software
24: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25: #
26: # /home/httpd/html/adm/gpl.txt
27: #
28: # http://www.lon-capa.org/
29: #
30:
31: =pod
32:
33: =head1 NAME
34:
35: lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
36:
37: =head1 SYNOPSIS
38:
39: This script should be run as user=www.
40: Note that a lonsql.pid file contains the pid of the parent process.
41:
42: =head1 OVERVIEW
43:
44: =head2 Purpose within LON-CAPA
45:
46: LON-CAPA is meant to distribute A LOT of educational content to A LOT
47: of people. It is ineffective to directly rely on contents within the
48: ext2 filesystem to be speedily scanned for on-the-fly searches of
49: content descriptions. (Simply put, it takes a cumbersome amount of
50: time to open, read, analyze, and close thousands of files.)
51:
52: The solution is to index various data fields that are descriptive of
53: the educational resources on a LON-CAPA server machine in a
54: database. Descriptive data fields are referred to as "metadata". The
55: question then arises as to how this metadata is handled in terms of
56: the rest of the LON-CAPA network without burdening client and daemon
57: processes.
58:
59: The obvious solution, using lonc to send a query to a lond process,
60: doesn't work so well in general as you can see in the following
61: example:
62:
63: lonc= loncapa client process A-lonc= a lonc process on Server A
64: lond= loncapa daemon process
65:
66: database command
67: A-lonc --------TCP/IP----------------> B-lond
68:
69: The problem emerges that A-lonc and B-lond are kept waiting for the
70: MySQL server to "do its stuff", or in other words, perform the
71: conceivably sophisticated, data-intensive, time-sucking database
72: transaction. By tying up a lonc and lond process, this significantly
73: cripples the capabilities of LON-CAPA servers.
74:
75: The solution is to offload the work onto another process, and use
76: lonc and lond just for requests and notifications of completed
77: processing:
78:
79: database command
80:
81: A-lonc ---------TCP/IP-----------------> B-lond =====> B-lonsql
82: <---------------------------------/ |
83: "ok, I'll get back to you..." |
84: |
85: /
86: A-lond <------------------------------- B-lonc <======
87: "Guess what? I have the result!"
88:
89: Of course, depending on success or failure, the messages may vary, but
90: the principle remains the same where a separate pool of children
91: processes (lonsql's) handle the MySQL database manipulations.
92:
93: Thus, lonc and lond spend effectively no time waiting on results from
94: the database.
95:
96: =head1 Internals
97:
98: =over 4
99:
100: =cut
101:
102: use strict;
103:
104: use lib '/home/httpd/lib/perl/';
105: use LONCAPA;
106: use LONCAPA::Configuration;
107: use LONCAPA::lonmetadata();
108: use Apache::lonnet;
109:
110: use IO::Socket;
111: use Symbol;
112: use POSIX;
113: use IO::Select;
114: use DBI;
115: use File::Find;
116: use localenroll;
117: use GDBM_File;
118:
119: ########################################################
120: ########################################################
121:
122: =pod
123:
124: =item Global Variables
125:
126: =over 4
127:
128: =item dbh
129:
130: =back
131:
132: =cut
133:
134: ########################################################
135: ########################################################
136: my $dbh;
137:
138: ########################################################
139: ########################################################
140:
141: =pod
142:
143: =item Variables required for forking
144:
145: =over 4
146:
147: =item $MAX_CLIENTS_PER_CHILD
148:
149: The number of clients each child should process.
150:
151: =item %children
152:
153: The keys to %children are the current child process IDs
154:
155: =item $children
156:
157: The current number of children
158:
159: =back
160:
161: =cut
162:
163: ########################################################
164: ########################################################
165: my $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should process
166: my %children = (); # keys are current child process IDs
167: my $children = 0; # current number of children
168:
169: ###################################################################
170: ###################################################################
171:
172: =pod
173:
174: =item Main body of code.
175:
176: =over 4
177:
178: =item Read data from loncapa_apache.conf and loncapa.conf.
179:
180: =item Ensure we can access the database.
181:
182: =item Determine if there are other instances of lonsql running.
183:
184: =item Read the hosts file.
185:
186: =item Create a socket for lonsql.
187:
188: =item Fork once and dissociate from parent.
189:
190: =item Write PID to disk.
191:
192: =item Prefork children and maintain the population of children.
193:
194: =back
195:
196: =cut
197:
198: ###################################################################
199: ###################################################################
200: my $childmaxattempts=10;
201: my $run =0; # running counter to generate the query-id
202: #
203: # Read loncapa_apache.conf and loncapa.conf
204: #
205: my %perlvar=%{&LONCAPA::Configuration::read_conf('loncapa.conf')};
206: #
207: # Write the /home/www/.my.cnf file
208: my $conf_file = '/home/www/.my.cnf';
209: if (! -e $conf_file) {
210: if (open MYCNF, ">$conf_file") {
211: print MYCNF <<"ENDMYCNF";
212: [client]
213: user=www
214: password=$perlvar{'lonSqlAccess'}
215: ENDMYCNF
216: close MYCNF;
217: } else {
218: warn "Unable to write $conf_file, continuing";
219: }
220: }
221:
222:
223: #
224: # Make sure that database can be accessed
225: #
226: my $dbh;
227: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
228: $perlvar{'lonSqlAccess'},
229: { RaiseError =>0,PrintError=>0})) {
230: print "Cannot connect to database!\n";
231: my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
232: my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!";
233: system("echo 'Cannot connect to MySQL database!' |".
234: " mailto $emailto -s '$subj' > /dev/null");
235:
236: open(SMP,'>/home/httpd/html/lon-status/mysql.txt');
237: print SMP 'time='.time.'&mysql=defunct'."\n";
238: close(SMP);
239:
240: exit 1;
241: } else {
242: unlink('/home/httpd/html/lon-status/mysql.txt');
243: $dbh->disconnect;
244: }
245:
246: #
247: # Check if other instance running
248: #
249: my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid";
250: if (-e $pidfile) {
251: open(my $lfh,"$pidfile");
252: my $pide=<$lfh>;
253: chomp($pide);
254: if (kill 0 => $pide) { die "already running"; }
255: }
256:
257: my $PREFORK=4; # number of children to maintain, at least four spare
258: #
259: #$PREFORK=int($PREFORK/4);
260:
261: #
262: # Create a socket to talk to lond
263: #
264: my $unixsock = "mysqlsock";
265: my $localfile="$perlvar{'lonSockDir'}/$unixsock";
266: my $server;
267: unlink ($localfile);
268: unless ($server=IO::Socket::UNIX->new(Local =>"$localfile",
269: Type => SOCK_STREAM,
270: Listen => 10)) {
271: print "in socket error:$@\n";
272: }
273:
274: #
275: # Fork once and dissociate
276: #
277: my $fpid=fork;
278: exit if $fpid;
279: die "Couldn't fork: $!" unless defined ($fpid);
280: POSIX::setsid() or die "Can't start new session: $!";
281:
282: #
283: # Write our PID on disk
284: my $execdir=$perlvar{'lonDaemons'};
285: open (PIDSAVE,">$execdir/logs/lonsql.pid");
286: print PIDSAVE "$$\n";
287: close(PIDSAVE);
288: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
289:
290: #
291: # Ignore signals generated during initial startup
292: $SIG{HUP}=$SIG{USR1}='IGNORE';
293: # Now we are on our own
294: # Fork off our children.
295: for (1 .. $PREFORK) {
296: make_new_child();
297: }
298:
299: #
300: # Install signal handlers.
301: $SIG{CHLD} = \&REAPER;
302: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
303: $SIG{HUP} = \&HUPSMAN;
304:
305: #
306: # And maintain the population.
307: while (1) {
308: sleep; # wait for a signal (i.e., child's death)
309: for (my $i = $children; $i < $PREFORK; $i++) {
310: make_new_child(); # top up the child pool
311: }
312: }
313:
314: ########################################################
315: ########################################################
316:
317: =pod
318:
319: =item &make_new_child
320:
321: Inputs: None
322:
323: Returns: None
324:
325: =cut
326:
327: ########################################################
328: ########################################################
329: sub make_new_child {
330: my $pid;
331: my $sigset;
332: #
333: # block signal for fork
334: $sigset = POSIX::SigSet->new(SIGINT);
335: sigprocmask(SIG_BLOCK, $sigset)
336: or die "Can't block SIGINT for fork: $!\n";
337: #
338: die "fork: $!" unless defined ($pid = fork);
339: #
340: if ($pid) {
341: # Parent records the child's birth and returns.
342: sigprocmask(SIG_UNBLOCK, $sigset)
343: or die "Can't unblock SIGINT for fork: $!\n";
344: $children{$pid} = 1;
345: $children++;
346: return;
347: } else {
348: # Child can *not* return from this subroutine.
349: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
350: # unblock signals
351: sigprocmask(SIG_UNBLOCK, $sigset)
352: or die "Can't unblock SIGINT for fork: $!\n";
353: #open database handle
354: # making dbh global to avoid garbage collector
355: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
356: $perlvar{'lonSqlAccess'},
357: { RaiseError =>0,PrintError=>0})) {
358: sleep(10+int(rand(20)));
359: &logthis("<font color='blue'>WARNING: Couldn't connect to database".
360: ": $@</font>");
361: # "($st secs): $@</font>");
362: print "database handle error\n";
363: exit;
364: }
365: # make sure that a database disconnection occurs with
366: # ending kill signals
367: $SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT;
368: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
369: for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
370: my $client = $server->accept() or last;
371: # do something with the connection
372: $run = $run+1;
373: my $userinput = <$client>;
374: chomp($userinput);
375: $userinput=~s/\:($LONCAPA::domain_re)$//;
376: my $searchdomain=$1;
377: #
378: my ($conserver,$query,
379: $arg1,$arg2,$arg3)=split(/&/,$userinput);
380: my $query=unescape($query);
381: #
382: #send query id which is pid_unixdatetime_runningcounter
383: my $queryid = &Apache::lonnet::hostname($perlvar{'lonHostID'});
384: $queryid .="_".($$)."_";
385: $queryid .= time."_";
386: $queryid .= $run;
387: print $client "$queryid\n";
388: #
389: # &logthis("QUERY: $query - $arg1 - $arg2 - $arg3 - $queryid");
390: # sleep 1;
391: #
392: my $result='';
393: #
394: # At this point, query is received, query-ID assigned and sent
395: # back, $query eq 'logquery' will mean that this is a query
396: # against log-files
397: if (($query eq 'userlog') || ($query eq 'courselog')) {
398: # beginning of log query
399: my $udom = &unescape($arg1);
400: my $uname = &unescape($arg2);
401: my $command = &unescape($arg3);
402: my $path = &propath($udom,$uname);
403: if (-e "$path/activity.log") {
404: if ($query eq 'userlog') {
405: $result=&userlog($path,$command);
406: } else {
407: $result=&courselog($path,$command);
408: }
409: $result = &escape($result);
410: } else {
411: &logthis('Unable to do log query: '.$uname.'@'.$udom);
412: $result='no_such_file';
413: }
414: # end of log query
415: } elsif (($query eq 'fetchenrollment') ||
416: ($query eq 'institutionalphotos')) {
417: # retrieve institutional class lists
418: my $dom = &unescape($arg1);
419: my %affiliates = ();
420: my %replies = ();
421: my $locresult = '';
422: my $querystr = &unescape($arg3);
423: foreach (split/%%/,$querystr) {
424: if (/^([^=]+)=([^=]+)$/) {
425: @{$affiliates{$1}} = split/,/,$2;
426: }
427: }
428: if ($query eq 'fetchenrollment') {
429: $locresult = &localenroll::fetch_enrollment($dom,\%affiliates,\%replies);
430: } elsif ($query eq 'institutionalphotos') {
431: my $crs = &unescape($arg2);
432: eval {
433: local($SIG{__DIE__})='DEFAULT';
434: $locresult = &localenroll::institutional_photos($dom,$crs,\%affiliates,\%replies,'update');
435: };
436: if ($@) {
437: $locresult = 'error';
438: }
439: }
440: $result = &escape($locresult.':');
441: if ($locresult) {
442: $result .= &escape(join(':',map{$_.'='.$replies{$_}} keys %replies));
443: }
444: } elsif ($query eq 'usersearch') {
445: my $srchdomain = &unescape($arg1);
446: my @items = split(/%%/,$arg2);
447: my ($srchby,$srchtype) = map {&unescape($_)} @items;
448: my $srchterm = &unescape($arg3);
449: my $quoted_dom = $dbh->quote( $srchdomain );
450: my ($query,$quoted_srchterm,@fields);
451: my ($table_columns,$table_indices) =
452: &LONCAPA::lonmetadata::describe_metadata_storage('allusers');
453: foreach my $coldata (@{$table_columns}) {
454: push(@fields,$coldata->{'name'});
455: }
456: my $fieldlist = join(',',@fields);
457: $query = "SELECT $fieldlist FROM allusers WHERE (domain = $quoted_dom AND ";
458: if ($srchby eq 'lastfirst') {
459: my ($fraglast,$fragfirst) = split(/,/,$srchterm);
460: $fragfirst =~ s/^\s+//;
461: $fraglast =~ s/\s+$//;
462: if ($srchtype eq 'exact') {
463: $query .= 'lastname = '.$dbh->quote($fraglast).
464: ' AND firstname = '.$dbh->quote($fragfirst);
465: } else {
466: $query .= 'lastname LIKE '.$dbh->quote('%'.$fraglast.'%').' AND firstname LIKE '.$dbh->quote('%'.$fragfirst.'%');
467: }
468: } else {
469: my %srchfield = (
470: uname => 'username',
471: lastname => 'lastname',
472: );
473: if ($srchtype eq 'exact') {
474: $query .= $srchfield{$srchby}.' = '.$dbh->quote($srchterm);
475: } else {
476: $query .= $srchfield{$srchby}.' LIKE '.$dbh->quote('%'.$srchterm.'%');
477: }
478: }
479: $query .= ") ORDER BY username ";
480: my $sth = $dbh->prepare($query);
481: if ($sth->execute()) {
482: my @results;
483: while (my @row = $sth->fetchrow_array) {
484: my @items;
485: for (my $i=0; $i<@row; $i++) {
486: push(@items,&escape($fields[$i]).'='.&escape($row[$i]));
487: }
488: push(@results,join(":", @items));
489: }
490: $sth->finish;
491: $result = &escape(join("&",@results));
492: } else {
493: &logthis('<font color="blue">'.
494: 'WARNING: Could not retrieve from database:'.
495: $sth->errstr().'</font>');
496: }
497: } elsif ($query eq 'instdirsearch') {
498: $result = &do_inst_dir_search($searchdomain,$arg1,$arg2,$arg3);
499: } elsif ($query eq 'prepare activity log') {
500: my ($cid,$domain) = map {&unescape($_);} ($arg1,$arg2);
501: &logthis('preparing activity log tables for '.$cid);
502: my $command =
503: qq{$perlvar{'lonDaemons'}/parse_activity_log.pl -course=$cid -domain=$domain};
504: system($command);
505: &logthis($command);
506: my $returnvalue = $?>>8;
507: if ($returnvalue) {
508: $result = 'error: parse_activity_log.pl returned '.
509: $returnvalue;
510: } else {
511: $result = 'success';
512: }
513: } elsif (($query eq 'portfolio_metadata') ||
514: ($query eq 'portfolio_access')) {
515: $result = &portfolio_table_update($query,$arg1,$arg2,
516: $arg3);
517: } elsif ($query eq 'allusers') {
518: my ($uname,$udom) = map {&unescape($_);} ($arg1,$arg2);
519: my %userdata;
520: my (@data) = split(/\%\%/,$arg3);
521: foreach my $item (@data) {
522: my ($key,$value) = split(/=/,$item);
523: $userdata{$key} = &unescape($value);
524: }
525: $userdata{'username'} = $uname;
526: $userdata{'domain'} = $udom;
527: $result = &allusers_table_update($query,$uname,$udom,\%userdata);
528: } else {
529: # Do an sql query
530: $result = &do_sql_query($query,$arg1,$arg2,$searchdomain);
531: }
532: # result does not need to be escaped because it has already been
533: # escaped.
534: #$result=&escape($result);
535: &Apache::lonnet::reply("queryreply:$queryid:$result",$conserver);
536: }
537: # tidy up gracefully and finish
538: #
539: # close the database handle
540: $dbh->disconnect
541: or &logthis("<font color='blue'>WARNING: Couldn't disconnect".
542: " from database $DBI::errstr : $@</font>");
543: # this exit is VERY important, otherwise the child will become
544: # a producer of more and more children, forking yourself into
545: # process death.
546: exit;
547: }
548: }
549:
550: sub do_inst_dir_search {
551: my ($domain,$srchby,$srchterm,$srchtype) = @_;
552: $srchby = &unescape($srchby);
553: $srchterm = &unescape($srchterm);
554: $srchtype = &unescape($srchtype);
555: my (%instusers,%instids,$result,$response);
556: eval {
557: local($SIG{__DIE__})='DEFAULT';
558: $result=&localenroll::get_userinfo($domain,undef,undef,\%instusers,
559: \%instids,undef,$srchby,$srchterm,
560: $srchtype);
561: };
562: if ($result eq 'ok') {
563: if (%instusers) {
564: foreach my $key (keys(%instusers)) {
565: my $usrstr = &Apache::lonnet::freeze_escape($instusers{$key});
566: $response .=&escape(&escape($key).'='.$usrstr).'&';
567: }
568: }
569: $response=~s/\&$//;
570: }
571: return $response;
572: }
573:
574: ########################################################
575: ########################################################
576:
577: =pod
578:
579: =item &do_sql_query
580:
581: Runs an sql metadata table query.
582:
583: Inputs: $query, $custom, $customshow
584:
585: Returns: A string containing escaped results.
586:
587: =cut
588:
589: ########################################################
590: ########################################################
591: {
592: my @metalist;
593:
594: sub process_file {
595: if ( -e $_ && # file exists
596: -f $_ && # and is a normal file
597: /\.meta$/ && # ends in meta
598: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
599: ) {
600: push(@metalist,$File::Find::name);
601: }
602: }
603:
604: sub do_sql_query {
605: my ($query,$custom,$customshow,$searchdomain) = @_;
606:
607: #
608: # limit to searchdomain if given and table is metadata
609: #
610: if (($searchdomain) && ($query=~/FROM metadata/)) {
611: $query.=' HAVING (domain="'.$searchdomain.'")';
612: }
613: # &logthis('doing query ('.$searchdomain.')'.$query);
614:
615:
616:
617: $custom = &unescape($custom);
618: $customshow = &unescape($customshow);
619: #
620: @metalist = ();
621: #
622: my $result = '';
623: my @results = ();
624: my @files;
625: my $subsetflag=0;
626: #
627: if ($query) {
628: #prepare and execute the query
629: my $sth = $dbh->prepare($query);
630: unless ($sth->execute()) {
631: &logthis('<font color="blue">'.
632: 'WARNING: Could not retrieve from database:'.
633: $sth->errstr().'</font>');
634: } else {
635: my $aref=$sth->fetchall_arrayref;
636: foreach my $row (@$aref) {
637: push @files,@{$row}[3] if ($custom or $customshow);
638: my @b=map { &escape($_); } @$row;
639: push @results,join(",", @b);
640: # Build up the @files array with the LON-CAPA urls
641: # of the resources.
642: }
643: }
644: }
645: # do custom metadata searching here and build into result
646: return join("&",@results) if (! ($custom or $customshow));
647: # Only get here if there is a custom query or custom show request
648: &logthis("Doing custom query for $custom");
649: if ($query) {
650: @metalist=map {
651: $perlvar{'lonDocRoot'}.$_.'.meta';
652: } @files;
653: } else {
654: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
655: @metalist=();
656: opendir(RESOURCES,$dir);
657: my @homeusers=grep {
658: &ishome($dir.'/'.$_);
659: } grep {!/^\.\.?$/} readdir(RESOURCES);
660: closedir RESOURCES;
661: # Define the
662: foreach my $user (@homeusers) {
663: find (\&process_file,$dir.'/'.$user);
664: }
665: }
666: # if file is indicated in sql database and
667: # not part of sql-relevant query, do not pattern match.
668: #
669: # if file is not in sql database, output error.
670: #
671: # if file is indicated in sql database and is
672: # part of query result list, then do the pattern match.
673: my $customresult='';
674: my @results;
675: foreach my $metafile (@metalist) {
676: open(my $fh,$metafile);
677: my @lines=<$fh>;
678: my $stuff=join('',@lines);
679: if ($stuff=~/$custom/s) {
680: foreach my $f ('abstract','author','copyright',
681: 'creationdate','keywords','language',
682: 'lastrevisiondate','mime','notes',
683: 'owner','subject','title') {
684: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
685: }
686: my $mfile=$metafile;
687: my $docroot=$perlvar{'lonDocRoot'};
688: $mfile=~s/^$docroot//;
689: $mfile=~s/\.meta$//;
690: unless ($query) {
691: my $q2="SELECT * FROM metadata WHERE url ".
692: " LIKE BINARY '?'";
693: my $sth = $dbh->prepare($q2);
694: $sth->execute($mfile);
695: my $aref=$sth->fetchall_arrayref;
696: foreach my $a (@$aref) {
697: my @b=map { &escape($_)} @$a;
698: push @results,join(",", @b);
699: }
700: }
701: # &logthis("found: $stuff");
702: $customresult.='&custom='.&escape($mfile).','.
703: escape($stuff);
704: }
705: }
706: $result=join("&",@results) unless $query;
707: $result.=$customresult;
708: #
709: return $result;
710: } # End of &do_sql_query
711:
712: } # End of scoping curly braces for &process_file and &do_sql_query
713:
714: sub portfolio_table_update {
715: my ($query,$arg1,$arg2,$arg3) = @_;
716: my %tablenames = (
717: 'portfolio' => 'portfolio_metadata',
718: 'access' => 'portfolio_access',
719: 'addedfields' => 'portfolio_addedfields',
720: );
721: my $result = 'ok';
722: my $tablechk = &check_table($query);
723: if ($tablechk == 0) {
724: my $request =
725: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
726: $dbh->do($request);
727: if ($dbh->err) {
728: &logthis("create $query".
729: " ERROR: ".$dbh->errstr);
730: $result = 'error';
731: }
732: }
733: if ($result eq 'ok') {
734: my ($uname,$udom,$group) = split(/:/,&unescape($arg1));
735: my $file_name = &unescape($arg2);
736: my $action = $arg3;
737: my $is_course = 0;
738: if ($group ne '') {
739: $is_course = 1;
740: }
741: my $urlstart = '/uploaded/'.$udom.'/'.$uname;
742: my $pathstart = &propath($udom,$uname).'/userfiles';
743: my ($fullpath,$url);
744: if ($is_course) {
745: $fullpath = $pathstart.'/groups/'.$group.'/portfolio'.
746: $file_name;
747: $url = $urlstart.'/groups/'.$group.'/portfolio'.$file_name;
748: } else {
749: $fullpath = $pathstart.'/portfolio'.$file_name;
750: $url = $urlstart.'/portfolio'.$file_name;
751: }
752: if ($query eq 'portfolio_metadata') {
753: if ($action eq 'delete') {
754: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
755: } elsif (-e $fullpath.'.meta') {
756: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
757: if (keys(%loghash) > 0) {
758: &portfolio_logging(%loghash);
759: }
760: }
761: } elsif ($query eq 'portfolio_access') {
762: my %access = &get_access_hash($uname,$udom,$group.$file_name);
763: my %loghash =
764: &LONCAPA::lonmetadata::process_portfolio_access_data($dbh,undef,
765: \%tablenames,$url,$fullpath,\%access,'update');
766: if (keys(%loghash) > 0) {
767: &portfolio_logging(%loghash);
768: } else {
769: my $available = 0;
770: foreach my $key (keys(%access)) {
771: my ($num,$scope,$end,$start) =
772: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
773: if ($scope eq 'public' || $scope eq 'guest') {
774: $available = 1;
775: last;
776: }
777: }
778: if ($available) {
779: # Retrieve current values
780: my $condition = 'url='.$dbh->quote("$url");
781: my ($error,$row) =
782: &LONCAPA::lonmetadata::lookup_metadata($dbh,$condition,undef,
783: 'portfolio_metadata');
784: if (!$error) {
785: if (!(ref($row->[0]) eq 'ARRAY')) {
786: my %loghash =
787: &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,
788: \%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group);
789: if (keys(%loghash) > 0) {
790: &portfolio_logging(%loghash);
791: }
792: }
793: }
794: }
795: }
796: }
797: }
798: return $result;
799: }
800:
801: sub get_access_hash {
802: my ($uname,$udom,$file) = @_;
803: my $hashref = &tie_user_hash($udom,$uname,'file_permissions',
804: &GDBM_READER());
805: my %curr_perms;
806: my %access;
807: if ($hashref) {
808: while (my ($key,$value) = each(%$hashref)) {
809: $key = &unescape($key);
810: next if ($key =~ /^error: 2 /);
811: $curr_perms{$key}=&Apache::lonnet::thaw_unescape($value);
812: }
813: if (!&untie_user_hash($hashref)) {
814: &logthis("error: ".($!+0)." untie (GDBM) Failed");
815: }
816: } else {
817: &logthis("error: ".($!+0)." tie (GDBM) Failed");
818: }
819: if (keys(%curr_perms) > 0) {
820: if (ref($curr_perms{$file."\0".'accesscontrol'}) eq 'HASH') {
821: foreach my $acl (keys(%{$curr_perms{$file."\0".'accesscontrol'}})) {
822: $access{$acl} = $curr_perms{$file."\0".$acl};
823: }
824: }
825: }
826: return %access;
827: }
828:
829: sub allusers_table_update {
830: my ($query,$uname,$udom,$userdata) = @_;
831: my %tablenames = (
832: 'allusers' => 'allusers',
833: );
834: my $result = 'ok';
835: my $tablechk = &check_table($query);
836: if ($tablechk == 0) {
837: my $request =
838: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
839: $dbh->do($request);
840: if ($dbh->err) {
841: &logthis("create $query".
842: " ERROR: ".$dbh->errstr);
843: $result = 'error';
844: }
845: }
846: if ($result eq 'ok') {
847: my %loghash =
848: &LONCAPA::lonmetadata::process_allusers_data($dbh,undef,
849: \%tablenames,$uname,$udom,$userdata,'update');
850: foreach my $key (keys(%loghash)) {
851: &logthis($loghash{$key});
852: }
853: }
854: return $result;
855: }
856:
857: ###########################################
858: sub check_table {
859: my ($table_id) = @_;
860: my $sth=$dbh->prepare('SHOW TABLES');
861: $sth->execute();
862: my $aref = $sth->fetchall_arrayref;
863: $sth->finish();
864: if ($sth->err()) {
865: &logthis("fetchall_arrayref after SHOW TABLES".
866: " ERROR: ".$sth->errstr);
867: return undef;
868: }
869: my $result = 0;
870: foreach my $table (@{$aref}) {
871: if ($table->[0] eq $table_id) {
872: $result = 1;
873: last;
874: }
875: }
876: return $result;
877: }
878:
879: ###########################################
880:
881: sub portfolio_logging {
882: my (%portlog) = @_;
883: foreach my $key (keys(%portlog)) {
884: if (ref($portlog{$key}) eq 'HASH') {
885: foreach my $item (keys(%{$portlog{$key}})) {
886: &logthis($portlog{$key}{$item});
887: }
888: }
889: }
890: }
891:
892:
893: ########################################################
894: ########################################################
895:
896: =pod
897:
898: =item &logthis
899:
900: Inputs: $message, the message to log
901:
902: Returns: nothing
903:
904: Writes $message to the logfile.
905:
906: =cut
907:
908: ########################################################
909: ########################################################
910: sub logthis {
911: my $message=shift;
912: my $execdir=$perlvar{'lonDaemons'};
913: open(my $fh,">>$execdir/logs/lonsql.log");
914: my $now=time;
915: my $local=localtime($now);
916: print $fh "$local ($$): $message\n";
917: }
918:
919: ########################################################
920: ########################################################
921:
922: =pod
923:
924: =item &ishome
925:
926: Determine if the current machine is the home server for a user.
927: The determination is made by checking the filesystem for the users information.
928:
929: Inputs: $author
930:
931: Returns: 0 - this is not the authors home server, 1 - this is.
932:
933: =cut
934:
935: ########################################################
936: ########################################################
937: sub ishome {
938: my $author=shift;
939: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
940: my ($udom,$uname)=split(/\//,$author);
941: my $proname=propath($udom,$uname);
942: if (-e $proname) {
943: return 1;
944: } else {
945: return 0;
946: }
947: }
948:
949: ########################################################
950: ########################################################
951:
952: =pod
953:
954: =item &courselog
955:
956: Inputs: $path, $command
957:
958: Returns: unescaped string of values.
959:
960: =cut
961:
962: ########################################################
963: ########################################################
964: sub courselog {
965: my ($path,$command)=@_;
966: my %filters=();
967: foreach (split(/\:/,&unescape($command))) {
968: my ($name,$value)=split(/\=/,$_);
969: $filters{$name}=$value;
970: }
971: my @results=();
972: open(IN,$path.'/activity.log') or return ('file_error');
973: while (my $line=<IN>) {
974: chomp($line);
975: my ($timestamp,$host,$log)=split(/\:/,$line);
976: #
977: # $log has the actual log entries; currently still escaped, and
978: # %26(timestamp)%3a(url)%3a(user)%3a(domain)
979: # then additionally
980: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
981: # or
982: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
983: #
984: # get delimiter between timestamped entries to be &&&
985: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
986: # now go over all log entries
987: foreach (split(/\&\&\&/,&unescape($log))) {
988: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
989: my $values=&unescape(join(':',@values));
990: $values=~s/\&/\:/g;
991: $res=&unescape($res);
992: my $include=1;
993: if (($filters{'username'}) && ($uname ne $filters{'username'}))
994: { $include=0; }
995: if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
996: { $include=0; }
997: if (($filters{'url'}) && ($res!~/$filters{'url'}/))
998: { $include=0; }
999: if (($filters{'start'}) && ($time<$filters{'start'}))
1000: { $include=0; }
1001: if (($filters{'end'}) && ($time>$filters{'end'}))
1002: { $include=0; }
1003: if (($filters{'action'} eq 'view') && ($action))
1004: { $include=0; }
1005: if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
1006: { $include=0; }
1007: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
1008: { $include=0; }
1009: if ($include) {
1010: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
1011: $uname.':'.$udom.':'.
1012: $action.':'.$values);
1013: }
1014: }
1015: }
1016: close IN;
1017: return join('&',sort(@results));
1018: }
1019:
1020: ########################################################
1021: ########################################################
1022:
1023: =pod
1024:
1025: =item &userlog
1026:
1027: Inputs: $path, $command
1028:
1029: Returns: unescaped string of values.
1030:
1031: =cut
1032:
1033: ########################################################
1034: ########################################################
1035: sub userlog {
1036: my ($path,$command)=@_;
1037: my %filters=();
1038: foreach (split(/\:/,&unescape($command))) {
1039: my ($name,$value)=split(/\=/,$_);
1040: $filters{$name}=$value;
1041: }
1042: my @results=();
1043: open(IN,$path.'/activity.log') or return ('file_error');
1044: while (my $line=<IN>) {
1045: chomp($line);
1046: my ($timestamp,$host,$log)=split(/\:/,$line);
1047: $log=&unescape($log);
1048: my $include=1;
1049: if (($filters{'start'}) && ($timestamp<$filters{'start'}))
1050: { $include=0; }
1051: if (($filters{'end'}) && ($timestamp>$filters{'end'}))
1052: { $include=0; }
1053: if (($filters{'action'} eq 'Role') && ($log !~/^Role/))
1054: { $include=0; }
1055: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
1056: if (($filters{'action'} eq 'check') && ($log!~/^Check/))
1057: { $include=0; }
1058: if ($include) {
1059: push(@results,$timestamp.':'.$host.':'.&escape($log));
1060: }
1061: }
1062: close IN;
1063: return join('&',sort(@results));
1064: }
1065:
1066: ########################################################
1067: ########################################################
1068:
1069: =pod
1070:
1071: =item Functions required for forking
1072:
1073: =over 4
1074:
1075: =item REAPER
1076:
1077: REAPER takes care of dead children.
1078:
1079: =item HUNTSMAN
1080:
1081: Signal handler for SIGINT.
1082:
1083: =item HUPSMAN
1084:
1085: Signal handler for SIGHUP
1086:
1087: =item DISCONNECT
1088:
1089: Disconnects from database.
1090:
1091: =back
1092:
1093: =cut
1094:
1095: ########################################################
1096: ########################################################
1097: sub REAPER { # takes care of dead children
1098: $SIG{CHLD} = \&REAPER;
1099: my $pid = wait;
1100: $children --;
1101: &logthis("Child $pid died");
1102: delete $children{$pid};
1103: }
1104:
1105: sub HUNTSMAN { # signal handler for SIGINT
1106: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1107: kill 'INT' => keys %children;
1108: my $execdir=$perlvar{'lonDaemons'};
1109: unlink("$execdir/logs/lonsql.pid");
1110: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1111: $unixsock = "mysqlsock";
1112: my $port="$perlvar{'lonSockDir'}/$unixsock";
1113: unlink($port);
1114: exit; # clean up with dignity
1115: }
1116:
1117: sub HUPSMAN { # signal handler for SIGHUP
1118: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1119: kill 'INT' => keys %children;
1120: close($server); # free up socket
1121: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1122: my $execdir=$perlvar{'lonDaemons'};
1123: $unixsock = "mysqlsock";
1124: my $port="$perlvar{'lonSockDir'}/$unixsock";
1125: unlink($port);
1126: exec("$execdir/lonsql"); # here we go again
1127: }
1128:
1129: sub DISCONNECT {
1130: $dbh->disconnect or
1131: &logthis("<font color='blue'>WARNING: Couldn't disconnect from database ".
1132: " $DBI::errstr : $@</font>");
1133: exit;
1134: }
1135:
1136:
1137: =pod
1138:
1139: =back
1140:
1141: =cut
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