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 1.84 2007/08/08 22:24:36 albertel 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(/,/,$srchterm);
460: if ($srchtype eq 'exact') {
461: $query .= 'lastname = '.$dbh->quote($fraglast).
462: ' AND firstname = '.$dbh->quote($fragfirst);
463: } else {
464: $query .= 'lastname LIKE '.$dbh->quote('%'.$fraglast.'%').' AND firstname LIKE '.$dbh->quote('%'.$fragfirst.'%');
465: }
466: } else {
467: my %srchfield = (
468: uname => 'username',
469: lastname => 'lastname',
470: );
471: if ($srchtype eq 'exact') {
472: $query .= $srchfield{$srchby}.' = '.$dbh->quote($srchterm);
473: } else {
474: $query .= $srchfield{$srchby}.' LIKE '.$dbh->quote('%'.$srchterm.'%');
475: }
476: }
477: $query .= ") ORDER BY username ";
478: my $sth = $dbh->prepare($query);
479: if ($sth->execute()) {
480: my @results;
481: while (my @row = $sth->fetchrow_array) {
482: my @items;
483: for (my $i=0; $i<@row; $i++) {
484: push(@items,&escape($fields[$i]).'='.&escape($row[$i]));
485: }
486: push(@results,join(":", @items));
487: }
488: $sth->finish;
489: $result = &escape(join("&",@results));
490: } else {
491: &logthis('<font color="blue">'.
492: 'WARNING: Could not retrieve from database:'.
493: $sth->errstr().'</font>');
494: }
495: } elsif ($query eq 'instdirsearch') {
496: $result = &do_inst_dir_search($searchdomain,$arg1,$arg2,$arg3);
497: } elsif ($query eq 'prepare activity log') {
498: my ($cid,$domain) = map {&unescape($_);} ($arg1,$arg2);
499: &logthis('preparing activity log tables for '.$cid);
500: my $command =
501: qq{$perlvar{'lonDaemons'}/parse_activity_log.pl -course=$cid -domain=$domain};
502: system($command);
503: &logthis($command);
504: my $returnvalue = $?>>8;
505: if ($returnvalue) {
506: $result = 'error: parse_activity_log.pl returned '.
507: $returnvalue;
508: } else {
509: $result = 'success';
510: }
511: } elsif (($query eq 'portfolio_metadata') ||
512: ($query eq 'portfolio_access')) {
513: $result = &portfolio_table_update($query,$arg1,$arg2,
514: $arg3);
515: } elsif ($query eq 'allusers') {
516: my ($uname,$udom) = map {&unescape($_);} ($arg1,$arg2);
517: my %userdata;
518: my (@data) = split(/\%\%/,$arg3);
519: foreach my $item (@data) {
520: my ($key,$value) = split(/=/,$item);
521: $userdata{$key} = &unescape($value);
522: }
523: $userdata{'username'} = $uname;
524: $userdata{'domain'} = $udom;
525: $result = &allusers_table_update($query,$uname,$udom,\%userdata);
526: } else {
527: # Do an sql query
528: $result = &do_sql_query($query,$arg1,$arg2,$searchdomain);
529: }
530: # result does not need to be escaped because it has already been
531: # escaped.
532: #$result=&escape($result);
533: &Apache::lonnet::reply("queryreply:$queryid:$result",$conserver);
534: }
535: # tidy up gracefully and finish
536: #
537: # close the database handle
538: $dbh->disconnect
539: or &logthis("<font color='blue'>WARNING: Couldn't disconnect".
540: " from database $DBI::errstr : $@</font>");
541: # this exit is VERY important, otherwise the child will become
542: # a producer of more and more children, forking yourself into
543: # process death.
544: exit;
545: }
546: }
547:
548: sub do_inst_dir_search {
549: my ($domain,$srchby,$srchterm,$srchtype) = @_;
550: $srchby = &unescape($srchby);
551: $srchterm = &unescape($srchterm);
552: $srchtype = &unescape($srchtype);
553: my (%instusers,%instids,$result,$response);
554: eval {
555: local($SIG{__DIE__})='DEFAULT';
556: $result=&localenroll::get_userinfo($domain,undef,undef,\%instusers,
557: \%instids,undef,$srchby,$srchterm,
558: $srchtype);
559: };
560: if ($result eq 'ok') {
561: if (%instusers) {
562: foreach my $key (keys(%instusers)) {
563: my $usrstr = &Apache::lonnet::freeze_escape($instusers{$key});
564: $response .=&escape(&escape($key).'='.$usrstr).'&';
565: }
566: }
567: $response=~s/\&$//;
568: }
569: return $response;
570: }
571:
572: ########################################################
573: ########################################################
574:
575: =pod
576:
577: =item &do_sql_query
578:
579: Runs an sql metadata table query.
580:
581: Inputs: $query, $custom, $customshow
582:
583: Returns: A string containing escaped results.
584:
585: =cut
586:
587: ########################################################
588: ########################################################
589: {
590: my @metalist;
591:
592: sub process_file {
593: if ( -e $_ && # file exists
594: -f $_ && # and is a normal file
595: /\.meta$/ && # ends in meta
596: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
597: ) {
598: push(@metalist,$File::Find::name);
599: }
600: }
601:
602: sub do_sql_query {
603: my ($query,$custom,$customshow,$searchdomain) = @_;
604:
605: #
606: # limit to searchdomain if given and table is metadata
607: #
608: if (($searchdomain) && ($query=~/FROM metadata/)) {
609: $query.=' HAVING (domain="'.$searchdomain.'")';
610: }
611: # &logthis('doing query ('.$searchdomain.')'.$query);
612:
613:
614:
615: $custom = &unescape($custom);
616: $customshow = &unescape($customshow);
617: #
618: @metalist = ();
619: #
620: my $result = '';
621: my @results = ();
622: my @files;
623: my $subsetflag=0;
624: #
625: if ($query) {
626: #prepare and execute the query
627: my $sth = $dbh->prepare($query);
628: unless ($sth->execute()) {
629: &logthis('<font color="blue">'.
630: 'WARNING: Could not retrieve from database:'.
631: $sth->errstr().'</font>');
632: } else {
633: my $aref=$sth->fetchall_arrayref;
634: foreach my $row (@$aref) {
635: push @files,@{$row}[3] if ($custom or $customshow);
636: my @b=map { &escape($_); } @$row;
637: push @results,join(",", @b);
638: # Build up the @files array with the LON-CAPA urls
639: # of the resources.
640: }
641: }
642: }
643: # do custom metadata searching here and build into result
644: return join("&",@results) if (! ($custom or $customshow));
645: # Only get here if there is a custom query or custom show request
646: &logthis("Doing custom query for $custom");
647: if ($query) {
648: @metalist=map {
649: $perlvar{'lonDocRoot'}.$_.'.meta';
650: } @files;
651: } else {
652: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
653: @metalist=();
654: opendir(RESOURCES,$dir);
655: my @homeusers=grep {
656: &ishome($dir.'/'.$_);
657: } grep {!/^\.\.?$/} readdir(RESOURCES);
658: closedir RESOURCES;
659: # Define the
660: foreach my $user (@homeusers) {
661: find (\&process_file,$dir.'/'.$user);
662: }
663: }
664: # if file is indicated in sql database and
665: # not part of sql-relevant query, do not pattern match.
666: #
667: # if file is not in sql database, output error.
668: #
669: # if file is indicated in sql database and is
670: # part of query result list, then do the pattern match.
671: my $customresult='';
672: my @results;
673: foreach my $metafile (@metalist) {
674: open(my $fh,$metafile);
675: my @lines=<$fh>;
676: my $stuff=join('',@lines);
677: if ($stuff=~/$custom/s) {
678: foreach my $f ('abstract','author','copyright',
679: 'creationdate','keywords','language',
680: 'lastrevisiondate','mime','notes',
681: 'owner','subject','title') {
682: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
683: }
684: my $mfile=$metafile;
685: my $docroot=$perlvar{'lonDocRoot'};
686: $mfile=~s/^$docroot//;
687: $mfile=~s/\.meta$//;
688: unless ($query) {
689: my $q2="SELECT * FROM metadata WHERE url ".
690: " LIKE BINARY '?'";
691: my $sth = $dbh->prepare($q2);
692: $sth->execute($mfile);
693: my $aref=$sth->fetchall_arrayref;
694: foreach my $a (@$aref) {
695: my @b=map { &escape($_)} @$a;
696: push @results,join(",", @b);
697: }
698: }
699: # &logthis("found: $stuff");
700: $customresult.='&custom='.&escape($mfile).','.
701: escape($stuff);
702: }
703: }
704: $result=join("&",@results) unless $query;
705: $result.=$customresult;
706: #
707: return $result;
708: } # End of &do_sql_query
709:
710: } # End of scoping curly braces for &process_file and &do_sql_query
711:
712: sub portfolio_table_update {
713: my ($query,$arg1,$arg2,$arg3) = @_;
714: my %tablenames = (
715: 'portfolio' => 'portfolio_metadata',
716: 'access' => 'portfolio_access',
717: 'addedfields' => 'portfolio_addedfields',
718: );
719: my $result = 'ok';
720: my $tablechk = &check_table($query);
721: if ($tablechk == 0) {
722: my $request =
723: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
724: $dbh->do($request);
725: if ($dbh->err) {
726: &logthis("create $query".
727: " ERROR: ".$dbh->errstr);
728: $result = 'error';
729: }
730: }
731: if ($result eq 'ok') {
732: my ($uname,$udom,$group) = split(/:/,&unescape($arg1));
733: my $file_name = &unescape($arg2);
734: my $action = $arg3;
735: my $is_course = 0;
736: if ($group ne '') {
737: $is_course = 1;
738: }
739: my $urlstart = '/uploaded/'.$udom.'/'.$uname;
740: my $pathstart = &propath($udom,$uname).'/userfiles';
741: my ($fullpath,$url);
742: if ($is_course) {
743: $fullpath = $pathstart.'/groups/'.$group.'/portfolio'.
744: $file_name;
745: $url = $urlstart.'/groups/'.$group.'/portfolio'.$file_name;
746: } else {
747: $fullpath = $pathstart.'/portfolio'.$file_name;
748: $url = $urlstart.'/portfolio'.$file_name;
749: }
750: if ($query eq 'portfolio_metadata') {
751: if ($action eq 'delete') {
752: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
753: } elsif (-e $fullpath.'.meta') {
754: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
755: if (keys(%loghash) > 0) {
756: &portfolio_logging(%loghash);
757: }
758: }
759: } elsif ($query eq 'portfolio_access') {
760: my %access = &get_access_hash($uname,$udom,$group.$file_name);
761: my %loghash =
762: &LONCAPA::lonmetadata::process_portfolio_access_data($dbh,undef,
763: \%tablenames,$url,$fullpath,\%access,'update');
764: if (keys(%loghash) > 0) {
765: &portfolio_logging(%loghash);
766: } else {
767: my $available = 0;
768: foreach my $key (keys(%access)) {
769: my ($num,$scope,$end,$start) =
770: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
771: if ($scope eq 'public' || $scope eq 'guest') {
772: $available = 1;
773: last;
774: }
775: }
776: if ($available) {
777: # Retrieve current values
778: my $condition = 'url='.$dbh->quote("$url");
779: my ($error,$row) =
780: &LONCAPA::lonmetadata::lookup_metadata($dbh,$condition,undef,
781: 'portfolio_metadata');
782: if (!$error) {
783: if (!(ref($row->[0]) eq 'ARRAY')) {
784: my %loghash =
785: &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,
786: \%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group);
787: if (keys(%loghash) > 0) {
788: &portfolio_logging(%loghash);
789: }
790: }
791: }
792: }
793: }
794: }
795: }
796: return $result;
797: }
798:
799: sub get_access_hash {
800: my ($uname,$udom,$file) = @_;
801: my $hashref = &tie_user_hash($udom,$uname,'file_permissions',
802: &GDBM_READER());
803: my %curr_perms;
804: my %access;
805: if ($hashref) {
806: while (my ($key,$value) = each(%$hashref)) {
807: $key = &unescape($key);
808: next if ($key =~ /^error: 2 /);
809: $curr_perms{$key}=&Apache::lonnet::thaw_unescape($value);
810: }
811: if (!&untie_user_hash($hashref)) {
812: &logthis("error: ".($!+0)." untie (GDBM) Failed");
813: }
814: } else {
815: &logthis("error: ".($!+0)." tie (GDBM) Failed");
816: }
817: if (keys(%curr_perms) > 0) {
818: if (ref($curr_perms{$file."\0".'accesscontrol'}) eq 'HASH') {
819: foreach my $acl (keys(%{$curr_perms{$file."\0".'accesscontrol'}})) {
820: $access{$acl} = $curr_perms{$file."\0".$acl};
821: }
822: }
823: }
824: return %access;
825: }
826:
827: sub allusers_table_update {
828: my ($query,$uname,$udom,$userdata) = @_;
829: my %tablenames = (
830: 'allusers' => 'allusers',
831: );
832: my $result = 'ok';
833: my $tablechk = &check_table($query);
834: if ($tablechk == 0) {
835: my $request =
836: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
837: $dbh->do($request);
838: if ($dbh->err) {
839: &logthis("create $query".
840: " ERROR: ".$dbh->errstr);
841: $result = 'error';
842: }
843: }
844: if ($result eq 'ok') {
845: my %loghash =
846: &LONCAPA::lonmetadata::process_allusers_data($dbh,undef,
847: \%tablenames,$uname,$udom,$userdata,'update');
848: foreach my $key (keys(%loghash)) {
849: &logthis($loghash{$key});
850: }
851: }
852: return $result;
853: }
854:
855: ###########################################
856: sub check_table {
857: my ($table_id) = @_;
858: my $sth=$dbh->prepare('SHOW TABLES');
859: $sth->execute();
860: my $aref = $sth->fetchall_arrayref;
861: $sth->finish();
862: if ($sth->err()) {
863: &logthis("fetchall_arrayref after SHOW TABLES".
864: " ERROR: ".$sth->errstr);
865: return undef;
866: }
867: my $result = 0;
868: foreach my $table (@{$aref}) {
869: if ($table->[0] eq $table_id) {
870: $result = 1;
871: last;
872: }
873: }
874: return $result;
875: }
876:
877: ###########################################
878:
879: sub portfolio_logging {
880: my (%portlog) = @_;
881: foreach my $key (keys(%portlog)) {
882: if (ref($portlog{$key}) eq 'HASH') {
883: foreach my $item (keys(%{$portlog{$key}})) {
884: &logthis($portlog{$key}{$item});
885: }
886: }
887: }
888: }
889:
890:
891: ########################################################
892: ########################################################
893:
894: =pod
895:
896: =item &logthis
897:
898: Inputs: $message, the message to log
899:
900: Returns: nothing
901:
902: Writes $message to the logfile.
903:
904: =cut
905:
906: ########################################################
907: ########################################################
908: sub logthis {
909: my $message=shift;
910: my $execdir=$perlvar{'lonDaemons'};
911: open(my $fh,">>$execdir/logs/lonsql.log");
912: my $now=time;
913: my $local=localtime($now);
914: print $fh "$local ($$): $message\n";
915: }
916:
917: ########################################################
918: ########################################################
919:
920: =pod
921:
922: =item &ishome
923:
924: Determine if the current machine is the home server for a user.
925: The determination is made by checking the filesystem for the users information.
926:
927: Inputs: $author
928:
929: Returns: 0 - this is not the authors home server, 1 - this is.
930:
931: =cut
932:
933: ########################################################
934: ########################################################
935: sub ishome {
936: my $author=shift;
937: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
938: my ($udom,$uname)=split(/\//,$author);
939: my $proname=propath($udom,$uname);
940: if (-e $proname) {
941: return 1;
942: } else {
943: return 0;
944: }
945: }
946:
947: ########################################################
948: ########################################################
949:
950: =pod
951:
952: =item &courselog
953:
954: Inputs: $path, $command
955:
956: Returns: unescaped string of values.
957:
958: =cut
959:
960: ########################################################
961: ########################################################
962: sub courselog {
963: my ($path,$command)=@_;
964: my %filters=();
965: foreach (split(/\:/,&unescape($command))) {
966: my ($name,$value)=split(/\=/,$_);
967: $filters{$name}=$value;
968: }
969: my @results=();
970: open(IN,$path.'/activity.log') or return ('file_error');
971: while (my $line=<IN>) {
972: chomp($line);
973: my ($timestamp,$host,$log)=split(/\:/,$line);
974: #
975: # $log has the actual log entries; currently still escaped, and
976: # %26(timestamp)%3a(url)%3a(user)%3a(domain)
977: # then additionally
978: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
979: # or
980: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
981: #
982: # get delimiter between timestamped entries to be &&&
983: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
984: # now go over all log entries
985: foreach (split(/\&\&\&/,&unescape($log))) {
986: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
987: my $values=&unescape(join(':',@values));
988: $values=~s/\&/\:/g;
989: $res=&unescape($res);
990: my $include=1;
991: if (($filters{'username'}) && ($uname ne $filters{'username'}))
992: { $include=0; }
993: if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
994: { $include=0; }
995: if (($filters{'url'}) && ($res!~/$filters{'url'}/))
996: { $include=0; }
997: if (($filters{'start'}) && ($time<$filters{'start'}))
998: { $include=0; }
999: if (($filters{'end'}) && ($time>$filters{'end'}))
1000: { $include=0; }
1001: if (($filters{'action'} eq 'view') && ($action))
1002: { $include=0; }
1003: if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
1004: { $include=0; }
1005: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
1006: { $include=0; }
1007: if ($include) {
1008: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
1009: $uname.':'.$udom.':'.
1010: $action.':'.$values);
1011: }
1012: }
1013: }
1014: close IN;
1015: return join('&',sort(@results));
1016: }
1017:
1018: ########################################################
1019: ########################################################
1020:
1021: =pod
1022:
1023: =item &userlog
1024:
1025: Inputs: $path, $command
1026:
1027: Returns: unescaped string of values.
1028:
1029: =cut
1030:
1031: ########################################################
1032: ########################################################
1033: sub userlog {
1034: my ($path,$command)=@_;
1035: my %filters=();
1036: foreach (split(/\:/,&unescape($command))) {
1037: my ($name,$value)=split(/\=/,$_);
1038: $filters{$name}=$value;
1039: }
1040: my @results=();
1041: open(IN,$path.'/activity.log') or return ('file_error');
1042: while (my $line=<IN>) {
1043: chomp($line);
1044: my ($timestamp,$host,$log)=split(/\:/,$line);
1045: $log=&unescape($log);
1046: my $include=1;
1047: if (($filters{'start'}) && ($timestamp<$filters{'start'}))
1048: { $include=0; }
1049: if (($filters{'end'}) && ($timestamp>$filters{'end'}))
1050: { $include=0; }
1051: if (($filters{'action'} eq 'Role') && ($log !~/^Role/))
1052: { $include=0; }
1053: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
1054: if (($filters{'action'} eq 'check') && ($log!~/^Check/))
1055: { $include=0; }
1056: if ($include) {
1057: push(@results,$timestamp.':'.$host.':'.&escape($log));
1058: }
1059: }
1060: close IN;
1061: return join('&',sort(@results));
1062: }
1063:
1064: ########################################################
1065: ########################################################
1066:
1067: =pod
1068:
1069: =item Functions required for forking
1070:
1071: =over 4
1072:
1073: =item REAPER
1074:
1075: REAPER takes care of dead children.
1076:
1077: =item HUNTSMAN
1078:
1079: Signal handler for SIGINT.
1080:
1081: =item HUPSMAN
1082:
1083: Signal handler for SIGHUP
1084:
1085: =item DISCONNECT
1086:
1087: Disconnects from database.
1088:
1089: =back
1090:
1091: =cut
1092:
1093: ########################################################
1094: ########################################################
1095: sub REAPER { # takes care of dead children
1096: $SIG{CHLD} = \&REAPER;
1097: my $pid = wait;
1098: $children --;
1099: &logthis("Child $pid died");
1100: delete $children{$pid};
1101: }
1102:
1103: sub HUNTSMAN { # signal handler for SIGINT
1104: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1105: kill 'INT' => keys %children;
1106: my $execdir=$perlvar{'lonDaemons'};
1107: unlink("$execdir/logs/lonsql.pid");
1108: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1109: $unixsock = "mysqlsock";
1110: my $port="$perlvar{'lonSockDir'}/$unixsock";
1111: unlink($port);
1112: exit; # clean up with dignity
1113: }
1114:
1115: sub HUPSMAN { # signal handler for SIGHUP
1116: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1117: kill 'INT' => keys %children;
1118: close($server); # free up socket
1119: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1120: my $execdir=$perlvar{'lonDaemons'};
1121: $unixsock = "mysqlsock";
1122: my $port="$perlvar{'lonSockDir'}/$unixsock";
1123: unlink($port);
1124: exec("$execdir/lonsql"); # here we go again
1125: }
1126:
1127: sub DISCONNECT {
1128: $dbh->disconnect or
1129: &logthis("<font color='blue'>WARNING: Couldn't disconnect from database ".
1130: " $DBI::errstr : $@</font>");
1131: exit;
1132: }
1133:
1134:
1135: =pod
1136:
1137: =back
1138:
1139: =cut
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