Annotation of loncom/lonsql, revision 1.88
1.1 harris41 1: #!/usr/bin/perl
1.39 harris41 2:
3: # The LearningOnline Network
1.40 harris41 4: # lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
1.39 harris41 5: #
1.88 ! raeburn 6: # $Id: lonsql,v 1.87 2007/08/31 12:33:25 raeburn Exp $
1.41 harris41 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: #
1.51 matthew 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:
1.56 bowersj2 42: =head1 OVERVIEW
1.51 matthew 43:
1.56 bowersj2 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.
1.51 matthew 95:
96: =head1 Internals
97:
98: =over 4
99:
100: =cut
101:
102: use strict;
1.36 www 103:
1.42 harris41 104: use lib '/home/httpd/lib/perl/';
1.77 albertel 105: use LONCAPA;
1.42 harris41 106: use LONCAPA::Configuration;
1.58 matthew 107: use LONCAPA::lonmetadata();
1.81 albertel 108: use Apache::lonnet;
1.42 harris41 109:
1.2 harris41 110: use IO::Socket;
111: use Symbol;
1.1 harris41 112: use POSIX;
113: use IO::Select;
114: use DBI;
1.51 matthew 115: use File::Find;
1.62 raeburn 116: use localenroll;
1.78 raeburn 117: use GDBM_File;
1.51 matthew 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
1.1 harris41 144:
1.51 matthew 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
1.9 harris41 162:
1.51 matthew 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
1.45 www 177:
1.51 matthew 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: #
1.81 albertel 205: my %perlvar=%{&LONCAPA::Configuration::read_conf('loncapa.conf')};
1.51 matthew 206: #
1.63 matthew 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: #
1.51 matthew 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");
1.57 www 235:
236: open(SMP,'>/home/httpd/html/lon-status/mysql.txt');
237: print SMP 'time='.time.'&mysql=defunct'."\n";
238: close(SMP);
239:
1.51 matthew 240: exit 1;
241: } else {
1.67 albertel 242: unlink('/home/httpd/html/lon-status/mysql.txt');
1.51 matthew 243: $dbh->disconnect;
244: }
1.52 matthew 245:
1.51 matthew 246: #
247: # Check if other instance running
248: #
249: my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid";
250: if (-e $pidfile) {
1.81 albertel 251: open(my $lfh,"$pidfile");
1.51 matthew 252: my $pide=<$lfh>;
253: chomp($pide);
254: if (kill 0 => $pide) { die "already running"; }
255: }
1.52 matthew 256:
1.51 matthew 257: my $PREFORK=4; # number of children to maintain, at least four spare
258: #
1.65 albertel 259: #$PREFORK=int($PREFORK/4);
1.52 matthew 260:
1.51 matthew 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";
1.45 www 272: }
1.52 matthew 273:
1.51 matthew 274: #
275: # Fork once and dissociate
1.52 matthew 276: #
1.51 matthew 277: my $fpid=fork;
1.1 harris41 278: exit if $fpid;
279: die "Couldn't fork: $!" unless defined ($fpid);
280: POSIX::setsid() or die "Can't start new session: $!";
1.52 matthew 281:
1.51 matthew 282: #
283: # Write our PID on disk
284: my $execdir=$perlvar{'lonDaemons'};
1.1 harris41 285: open (PIDSAVE,">$execdir/logs/lonsql.pid");
286: print PIDSAVE "$$\n";
287: close(PIDSAVE);
1.59 albertel 288: &logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
1.52 matthew 289:
1.51 matthew 290: #
291: # Ignore signals generated during initial startup
1.1 harris41 292: $SIG{HUP}=$SIG{USR1}='IGNORE';
1.51 matthew 293: # Now we are on our own
294: # Fork off our children.
1.2 harris41 295: for (1 .. $PREFORK) {
296: make_new_child();
1.1 harris41 297: }
1.52 matthew 298:
1.51 matthew 299: #
1.2 harris41 300: # Install signal handlers.
1.1 harris41 301: $SIG{CHLD} = \&REAPER;
302: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
303: $SIG{HUP} = \&HUPSMAN;
1.52 matthew 304:
1.51 matthew 305: #
1.1 harris41 306: # And maintain the population.
307: while (1) {
308: sleep; # wait for a signal (i.e., child's death)
1.51 matthew 309: for (my $i = $children; $i < $PREFORK; $i++) {
1.2 harris41 310: make_new_child(); # top up the child pool
1.1 harris41 311: }
312: }
313:
1.51 matthew 314: ########################################################
315: ########################################################
316:
317: =pod
318:
319: =item &make_new_child
320:
321: Inputs: None
322:
323: Returns: None
324:
325: =cut
1.2 harris41 326:
1.51 matthew 327: ########################################################
328: ########################################################
1.1 harris41 329: sub make_new_child {
330: my $pid;
331: my $sigset;
1.51 matthew 332: #
1.1 harris41 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";
1.51 matthew 337: #
1.2 harris41 338: die "fork: $!" unless defined ($pid = fork);
1.51 matthew 339: #
1.1 harris41 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 {
1.2 harris41 348: # Child can *not* return from this subroutine.
1.1 harris41 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";
1.2 harris41 353: #open database handle
354: # making dbh global to avoid garbage collector
1.51 matthew 355: unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
356: $perlvar{'lonSqlAccess'},
357: { RaiseError =>0,PrintError=>0})) {
358: sleep(10+int(rand(20)));
1.59 albertel 359: &logthis("<font color='blue'>WARNING: Couldn't connect to database".
1.51 matthew 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
1.2 harris41 367: $SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT;
1.1 harris41 368: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
1.51 matthew 369: for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
370: my $client = $server->accept() or last;
1.2 harris41 371: # do something with the connection
1.1 harris41 372: $run = $run+1;
1.2 harris41 373: my $userinput = <$client>;
374: chomp($userinput);
1.83 albertel 375: $userinput=~s/\:($LONCAPA::domain_re)$//;
1.73 www 376: my $searchdomain=$1;
1.51 matthew 377: #
1.45 www 378: my ($conserver,$query,
379: $arg1,$arg2,$arg3)=split(/&/,$userinput);
380: my $query=unescape($query);
1.51 matthew 381: #
1.2 harris41 382: #send query id which is pid_unixdatetime_runningcounter
1.81 albertel 383: my $queryid = &Apache::lonnet::hostname($perlvar{'lonHostID'});
1.2 harris41 384: $queryid .="_".($$)."_";
385: $queryid .= time."_";
386: $queryid .= $run;
387: print $client "$queryid\n";
1.51 matthew 388: #
1.81 albertel 389: # &logthis("QUERY: $query - $arg1 - $arg2 - $arg3 - $queryid");
1.84 albertel 390: # sleep 1;
1.51 matthew 391: #
1.45 www 392: my $result='';
1.51 matthew 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: }
1.80 raeburn 409: $result = &escape($result);
1.51 matthew 410: } else {
411: &logthis('Unable to do log query: '.$uname.'@'.$udom);
412: $result='no_such_file';
413: }
414: # end of log query
1.70 raeburn 415: } elsif (($query eq 'fetchenrollment') ||
1.71 albertel 416: ($query eq 'institutionalphotos')) {
1.62 raeburn 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/%%/,$querystr) {
1.68 raeburn 424: if (/^([^=]+)=([^=]+)$/) {
1.62 raeburn 425: @{$affiliates{$1}} = split/,/,$2;
426: }
427: }
1.70 raeburn 428: if ($query eq 'fetchenrollment') {
429: $locresult = &localenroll::fetch_enrollment($dom,\%affiliates,\%replies);
430: } elsif ($query eq 'institutionalphotos') {
431: my $crs = &unescape($arg2);
1.75 albertel 432: eval {
433: local($SIG{__DIE__})='DEFAULT';
434: $locresult = &localenroll::institutional_photos($dom,$crs,\%affiliates,\%replies,'update');
435: };
436: if ($@) {
437: $locresult = 'error';
438: }
1.70 raeburn 439: }
1.62 raeburn 440: $result = &escape($locresult.':');
441: if ($locresult) {
442: $result .= &escape(join(':',map{$_.'='.$replies{$_}} keys %replies));
443: }
1.82 raeburn 444: } elsif ($query eq 'usersearch') {
1.88 ! raeburn 445: my ($srchby,$srchtype,$srchterm);
! 446: if ((&unescape($arg1) eq $searchdomain) &&
! 447: ($arg2 =~ /\%\%/)) {
! 448: ($srchby,$srchtype) =
! 449: map {&unescape($_);} (split(/\%\%/,$arg2));
! 450: my $srchterm = &unescape($arg3);
1.82 raeburn 451: } else {
1.88 ! raeburn 452: ($srchby,$srchtype,$srchterm) =
! 453: map {&unescape($_);} ($arg1,$arg2,$arg3);
1.82 raeburn 454: }
1.88 ! raeburn 455: $result = &do_user_search($searchdomain,$srchby,
! 456: $srchtype,$srchterm);
1.84 albertel 457: } elsif ($query eq 'instdirsearch') {
458: $result = &do_inst_dir_search($searchdomain,$arg1,$arg2,$arg3);
1.63 matthew 459: } elsif ($query eq 'prepare activity log') {
460: my ($cid,$domain) = map {&unescape($_);} ($arg1,$arg2);
1.64 matthew 461: &logthis('preparing activity log tables for '.$cid);
1.63 matthew 462: my $command =
1.64 matthew 463: qq{$perlvar{'lonDaemons'}/parse_activity_log.pl -course=$cid -domain=$domain};
1.63 matthew 464: system($command);
1.64 matthew 465: &logthis($command);
1.63 matthew 466: my $returnvalue = $?>>8;
467: if ($returnvalue) {
468: $result = 'error: parse_activity_log.pl returned '.
469: $returnvalue;
470: } else {
471: $result = 'success';
472: }
1.78 raeburn 473: } elsif (($query eq 'portfolio_metadata') ||
474: ($query eq 'portfolio_access')) {
475: $result = &portfolio_table_update($query,$arg1,$arg2,
476: $arg3);
1.82 raeburn 477: } elsif ($query eq 'allusers') {
478: my ($uname,$udom) = map {&unescape($_);} ($arg1,$arg2);
479: my %userdata;
480: my (@data) = split(/\%\%/,$arg3);
481: foreach my $item (@data) {
482: my ($key,$value) = split(/=/,$item);
483: $userdata{$key} = &unescape($value);
484: }
485: $userdata{'username'} = $uname;
486: $userdata{'domain'} = $udom;
487: $result = &allusers_table_update($query,$uname,$udom,\%userdata);
1.51 matthew 488: } else {
489: # Do an sql query
1.74 www 490: $result = &do_sql_query($query,$arg1,$arg2,$searchdomain);
1.51 matthew 491: }
1.50 matthew 492: # result does not need to be escaped because it has already been
493: # escaped.
494: #$result=&escape($result);
1.81 albertel 495: &Apache::lonnet::reply("queryreply:$queryid:$result",$conserver);
1.1 harris41 496: }
497: # tidy up gracefully and finish
1.51 matthew 498: #
499: # close the database handle
1.2 harris41 500: $dbh->disconnect
1.59 albertel 501: or &logthis("<font color='blue'>WARNING: Couldn't disconnect".
1.51 matthew 502: " from database $DBI::errstr : $@</font>");
1.1 harris41 503: # this exit is VERY important, otherwise the child will become
504: # a producer of more and more children, forking yourself into
505: # process death.
506: exit;
507: }
1.2 harris41 508: }
1.1 harris41 509:
1.88 ! raeburn 510: sub do_user_search {
! 511: my ($domain,$srchby,$srchtype,$srchterm) = @_;
! 512: my $result;
! 513: my $quoted_dom = $dbh->quote( $domain );
! 514: my ($query,$quoted_srchterm,@fields);
! 515: my ($table_columns,$table_indices) =
! 516: &LONCAPA::lonmetadata::describe_metadata_storage('allusers');
! 517: foreach my $coldata (@{$table_columns}) {
! 518: push(@fields,$coldata->{'name'});
! 519: }
! 520: my $fieldlist = join(',',@fields);
! 521: $query = "SELECT $fieldlist FROM allusers WHERE (domain = $quoted_dom AND ";
! 522: if ($srchby eq 'lastfirst') {
! 523: my ($fraglast,$fragfirst) = split(/,/,$srchterm);
! 524: $fragfirst =~ s/^\s+//;
! 525: $fraglast =~ s/\s+$//;
! 526: if ($srchtype eq 'exact') {
! 527: $query .= 'lastname = '.$dbh->quote($fraglast).
! 528: ' AND firstname = '.$dbh->quote($fragfirst);
! 529: } elsif ($srchtype eq 'begins') {
! 530: $query .= 'lastname LIKE '.$dbh->quote($fraglast.'%').
! 531: ' AND firstname LIKE '.$dbh->quote($fragfirst.'%');
! 532: } else {
! 533: $query .= 'lastname LIKE '.$dbh->quote('%'.$fraglast.'%').
! 534: ' AND firstname LIKE '.$dbh->quote('%'.$fragfirst.'%');
! 535: }
! 536: } else {
! 537: my %srchfield = (
! 538: uname => 'username',
! 539: lastname => 'lastname',
! 540: );
! 541: if ($srchtype eq 'exact') {
! 542: $query .= $srchfield{$srchby}.' = '.$dbh->quote($srchterm);
! 543: } elsif ($srchtype eq 'begins') {
! 544: $query .= $srchfield{$srchby}.' LIKE '.$dbh->quote($srchterm.'%');
! 545: } else {
! 546: $query .= $srchfield{$srchby}.' LIKE '.$dbh->quote('%'.$srchterm.'%');
! 547: }
! 548: }
! 549: $query .= ") ORDER BY username ";
! 550: my $sth = $dbh->prepare($query);
! 551: if ($sth->execute()) {
! 552: my @results;
! 553: while (my @row = $sth->fetchrow_array) {
! 554: my @items;
! 555: for (my $i=0; $i<@row; $i++) {
! 556: push(@items,&escape($fields[$i]).'='.&escape($row[$i]));
! 557: }
! 558: my $userstr = join(':', @items);
! 559: push(@results,&escape($userstr));
! 560: }
! 561: $sth->finish;
! 562: $result = join('&',@results);
! 563: } else {
! 564: &logthis('<font color="blue">'.
! 565: 'WARNING: Could not retrieve from database:'.
! 566: $sth->errstr().'</font>');
! 567: }
! 568: return $result;
! 569: }
! 570:
1.84 albertel 571: sub do_inst_dir_search {
572: my ($domain,$srchby,$srchterm,$srchtype) = @_;
573: $srchby = &unescape($srchby);
574: $srchterm = &unescape($srchterm);
575: $srchtype = &unescape($srchtype);
576: my (%instusers,%instids,$result,$response);
577: eval {
578: local($SIG{__DIE__})='DEFAULT';
579: $result=&localenroll::get_userinfo($domain,undef,undef,\%instusers,
580: \%instids,undef,$srchby,$srchterm,
581: $srchtype);
582: };
583: if ($result eq 'ok') {
584: if (%instusers) {
585: foreach my $key (keys(%instusers)) {
586: my $usrstr = &Apache::lonnet::freeze_escape($instusers{$key});
587: $response .=&escape(&escape($key).'='.$usrstr).'&';
588: }
589: }
590: $response=~s/\&$//;
1.87 raeburn 591: } else {
592: $response = 'unavailable';
1.84 albertel 593: }
594: return $response;
595: }
596:
1.51 matthew 597: ########################################################
598: ########################################################
599:
600: =pod
601:
602: =item &do_sql_query
603:
604: Runs an sql metadata table query.
605:
606: Inputs: $query, $custom, $customshow
607:
608: Returns: A string containing escaped results.
609:
610: =cut
611:
612: ########################################################
613: ########################################################
614: {
615: my @metalist;
616:
617: sub process_file {
618: if ( -e $_ && # file exists
619: -f $_ && # and is a normal file
620: /\.meta$/ && # ends in meta
621: ! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
622: ) {
623: push(@metalist,$File::Find::name);
624: }
625: }
626:
627: sub do_sql_query {
1.74 www 628: my ($query,$custom,$customshow,$searchdomain) = @_;
629:
630: #
631: # limit to searchdomain if given and table is metadata
632: #
633: if (($searchdomain) && ($query=~/FROM metadata/)) {
634: $query.=' HAVING (domain="'.$searchdomain.'")';
635: }
636: # &logthis('doing query ('.$searchdomain.')'.$query);
637:
638:
639:
1.51 matthew 640: $custom = &unescape($custom);
641: $customshow = &unescape($customshow);
642: #
643: @metalist = ();
644: #
645: my $result = '';
646: my @results = ();
647: my @files;
648: my $subsetflag=0;
649: #
650: if ($query) {
651: #prepare and execute the query
652: my $sth = $dbh->prepare($query);
653: unless ($sth->execute()) {
1.59 albertel 654: &logthis('<font color="blue">'.
1.58 matthew 655: 'WARNING: Could not retrieve from database:'.
656: $sth->errstr().'</font>');
1.51 matthew 657: } else {
658: my $aref=$sth->fetchall_arrayref;
659: foreach my $row (@$aref) {
660: push @files,@{$row}[3] if ($custom or $customshow);
661: my @b=map { &escape($_); } @$row;
662: push @results,join(",", @b);
663: # Build up the @files array with the LON-CAPA urls
664: # of the resources.
665: }
666: }
667: }
668: # do custom metadata searching here and build into result
669: return join("&",@results) if (! ($custom or $customshow));
670: # Only get here if there is a custom query or custom show request
671: &logthis("Doing custom query for $custom");
672: if ($query) {
673: @metalist=map {
674: $perlvar{'lonDocRoot'}.$_.'.meta';
675: } @files;
676: } else {
677: my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
678: @metalist=();
679: opendir(RESOURCES,$dir);
680: my @homeusers=grep {
681: &ishome($dir.'/'.$_);
682: } grep {!/^\.\.?$/} readdir(RESOURCES);
683: closedir RESOURCES;
684: # Define the
685: foreach my $user (@homeusers) {
686: find (\&process_file,$dir.'/'.$user);
687: }
688: }
689: # if file is indicated in sql database and
690: # not part of sql-relevant query, do not pattern match.
691: #
692: # if file is not in sql database, output error.
693: #
694: # if file is indicated in sql database and is
695: # part of query result list, then do the pattern match.
696: my $customresult='';
697: my @results;
698: foreach my $metafile (@metalist) {
1.81 albertel 699: open(my $fh,$metafile);
1.51 matthew 700: my @lines=<$fh>;
701: my $stuff=join('',@lines);
702: if ($stuff=~/$custom/s) {
703: foreach my $f ('abstract','author','copyright',
704: 'creationdate','keywords','language',
705: 'lastrevisiondate','mime','notes',
706: 'owner','subject','title') {
707: $stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
708: }
709: my $mfile=$metafile;
710: my $docroot=$perlvar{'lonDocRoot'};
711: $mfile=~s/^$docroot//;
712: $mfile=~s/\.meta$//;
713: unless ($query) {
714: my $q2="SELECT * FROM metadata WHERE url ".
715: " LIKE BINARY '?'";
716: my $sth = $dbh->prepare($q2);
717: $sth->execute($mfile);
718: my $aref=$sth->fetchall_arrayref;
719: foreach my $a (@$aref) {
720: my @b=map { &escape($_)} @$a;
721: push @results,join(",", @b);
722: }
723: }
724: # &logthis("found: $stuff");
725: $customresult.='&custom='.&escape($mfile).','.
726: escape($stuff);
727: }
728: }
729: $result=join("&",@results) unless $query;
730: $result.=$customresult;
731: #
732: return $result;
733: } # End of &do_sql_query
734:
735: } # End of scoping curly braces for &process_file and &do_sql_query
1.78 raeburn 736:
737: sub portfolio_table_update {
738: my ($query,$arg1,$arg2,$arg3) = @_;
739: my %tablenames = (
740: 'portfolio' => 'portfolio_metadata',
741: 'access' => 'portfolio_access',
742: 'addedfields' => 'portfolio_addedfields',
743: );
744: my $result = 'ok';
745: my $tablechk = &check_table($query);
746: if ($tablechk == 0) {
747: my $request =
748: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
749: $dbh->do($request);
750: if ($dbh->err) {
751: &logthis("create $query".
752: " ERROR: ".$dbh->errstr);
753: $result = 'error';
754: }
755: }
756: if ($result eq 'ok') {
1.79 raeburn 757: my ($uname,$udom,$group) = split(/:/,&unescape($arg1));
1.78 raeburn 758: my $file_name = &unescape($arg2);
1.79 raeburn 759: my $action = $arg3;
1.78 raeburn 760: my $is_course = 0;
761: if ($group ne '') {
762: $is_course = 1;
763: }
764: my $urlstart = '/uploaded/'.$udom.'/'.$uname;
765: my $pathstart = &propath($udom,$uname).'/userfiles';
766: my ($fullpath,$url);
767: if ($is_course) {
768: $fullpath = $pathstart.'/groups/'.$group.'/portfolio'.
769: $file_name;
770: $url = $urlstart.'/groups/'.$group.'/portfolio'.$file_name;
771: } else {
772: $fullpath = $pathstart.'/portfolio'.$file_name;
773: $url = $urlstart.'/portfolio'.$file_name;
774: }
775: if ($query eq 'portfolio_metadata') {
1.79 raeburn 776: if ($action eq 'delete') {
777: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
778: } elsif (-e $fullpath.'.meta') {
1.78 raeburn 779: my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
780: if (keys(%loghash) > 0) {
781: &portfolio_logging(%loghash);
782: }
783: }
784: } elsif ($query eq 'portfolio_access') {
1.79 raeburn 785: my %access = &get_access_hash($uname,$udom,$group.$file_name);
1.78 raeburn 786: my %loghash =
787: &LONCAPA::lonmetadata::process_portfolio_access_data($dbh,undef,
788: \%tablenames,$url,$fullpath,\%access,'update');
789: if (keys(%loghash) > 0) {
790: &portfolio_logging(%loghash);
791: } else {
792: my $available = 0;
793: foreach my $key (keys(%access)) {
794: my ($num,$scope,$end,$start) =
795: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
796: if ($scope eq 'public' || $scope eq 'guest') {
797: $available = 1;
798: last;
799: }
800: }
801: if ($available) {
802: # Retrieve current values
803: my $condition = 'url='.$dbh->quote("$url");
804: my ($error,$row) =
805: &LONCAPA::lonmetadata::lookup_metadata($dbh,$condition,undef,
806: 'portfolio_metadata');
807: if (!$error) {
808: if (!(ref($row->[0]) eq 'ARRAY')) {
809: my %loghash =
810: &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,
811: \%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group);
812: if (keys(%loghash) > 0) {
813: &portfolio_logging(%loghash);
814: }
815: }
816: }
817: }
818: }
819: }
820: }
821: return $result;
822: }
823:
824: sub get_access_hash {
825: my ($uname,$udom,$file) = @_;
826: my $hashref = &tie_user_hash($udom,$uname,'file_permissions',
827: &GDBM_READER());
828: my %curr_perms;
829: my %access;
830: if ($hashref) {
831: while (my ($key,$value) = each(%$hashref)) {
832: $key = &unescape($key);
833: next if ($key =~ /^error: 2 /);
1.81 albertel 834: $curr_perms{$key}=&Apache::lonnet::thaw_unescape($value);
1.78 raeburn 835: }
836: if (!&untie_user_hash($hashref)) {
837: &logthis("error: ".($!+0)." untie (GDBM) Failed");
838: }
839: } else {
840: &logthis("error: ".($!+0)." tie (GDBM) Failed");
841: }
842: if (keys(%curr_perms) > 0) {
843: if (ref($curr_perms{$file."\0".'accesscontrol'}) eq 'HASH') {
844: foreach my $acl (keys(%{$curr_perms{$file."\0".'accesscontrol'}})) {
845: $access{$acl} = $curr_perms{$file."\0".$acl};
846: }
847: }
848: }
849: return %access;
850: }
851:
1.82 raeburn 852: sub allusers_table_update {
853: my ($query,$uname,$udom,$userdata) = @_;
854: my %tablenames = (
855: 'allusers' => 'allusers',
856: );
857: my $result = 'ok';
858: my $tablechk = &check_table($query);
859: if ($tablechk == 0) {
860: my $request =
861: &LONCAPA::lonmetadata::create_metadata_storage($query,$query);
862: $dbh->do($request);
863: if ($dbh->err) {
864: &logthis("create $query".
865: " ERROR: ".$dbh->errstr);
866: $result = 'error';
867: }
868: }
869: if ($result eq 'ok') {
870: my %loghash =
871: &LONCAPA::lonmetadata::process_allusers_data($dbh,undef,
872: \%tablenames,$uname,$udom,$userdata,'update');
873: foreach my $key (keys(%loghash)) {
874: &logthis($loghash{$key});
875: }
876: }
877: return $result;
878: }
879:
1.78 raeburn 880: ###########################################
881: sub check_table {
882: my ($table_id) = @_;
883: my $sth=$dbh->prepare('SHOW TABLES');
884: $sth->execute();
885: my $aref = $sth->fetchall_arrayref;
886: $sth->finish();
887: if ($sth->err()) {
888: &logthis("fetchall_arrayref after SHOW TABLES".
889: " ERROR: ".$sth->errstr);
890: return undef;
891: }
892: my $result = 0;
893: foreach my $table (@{$aref}) {
894: if ($table->[0] eq $table_id) {
895: $result = 1;
896: last;
897: }
898: }
899: return $result;
900: }
901:
902: ###########################################
903:
904: sub portfolio_logging {
905: my (%portlog) = @_;
906: foreach my $key (keys(%portlog)) {
907: if (ref($portlog{$key}) eq 'HASH') {
908: foreach my $item (keys(%{$portlog{$key}})) {
909: &logthis($portlog{$key}{$item});
910: }
911: }
912: }
913: }
914:
915:
1.51 matthew 916: ########################################################
917: ########################################################
918:
919: =pod
920:
921: =item &logthis
922:
923: Inputs: $message, the message to log
924:
925: Returns: nothing
926:
927: Writes $message to the logfile.
928:
929: =cut
930:
931: ########################################################
932: ########################################################
933: sub logthis {
934: my $message=shift;
935: my $execdir=$perlvar{'lonDaemons'};
1.81 albertel 936: open(my $fh,">>$execdir/logs/lonsql.log");
1.51 matthew 937: my $now=time;
938: my $local=localtime($now);
939: print $fh "$local ($$): $message\n";
1.2 harris41 940: }
1.1 harris41 941:
1.51 matthew 942: ########################################################
943: ########################################################
944:
945: =pod
946:
947: =item &ishome
948:
949: Determine if the current machine is the home server for a user.
950: The determination is made by checking the filesystem for the users information.
951:
952: Inputs: $author
953:
954: Returns: 0 - this is not the authors home server, 1 - this is.
955:
956: =cut
957:
958: ########################################################
959: ########################################################
1.34 harris41 960: sub ishome {
961: my $author=shift;
962: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
963: my ($udom,$uname)=split(/\//,$author);
964: my $proname=propath($udom,$uname);
965: if (-e $proname) {
966: return 1;
967: } else {
968: return 0;
969: }
970: }
971:
1.51 matthew 972: ########################################################
973: ########################################################
974:
975: =pod
976:
977: =item &courselog
978:
979: Inputs: $path, $command
980:
981: Returns: unescaped string of values.
982:
983: =cut
984:
985: ########################################################
986: ########################################################
987: sub courselog {
988: my ($path,$command)=@_;
989: my %filters=();
990: foreach (split(/\:/,&unescape($command))) {
991: my ($name,$value)=split(/\=/,$_);
992: $filters{$name}=$value;
993: }
994: my @results=();
995: open(IN,$path.'/activity.log') or return ('file_error');
996: while (my $line=<IN>) {
997: chomp($line);
998: my ($timestamp,$host,$log)=split(/\:/,$line);
999: #
1000: # $log has the actual log entries; currently still escaped, and
1001: # %26(timestamp)%3a(url)%3a(user)%3a(domain)
1002: # then additionally
1003: # %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
1004: # or
1005: # %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
1006: #
1007: # get delimiter between timestamped entries to be &&&
1008: $log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
1009: # now go over all log entries
1010: foreach (split(/\&\&\&/,&unescape($log))) {
1011: my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
1012: my $values=&unescape(join(':',@values));
1013: $values=~s/\&/\:/g;
1014: $res=&unescape($res);
1015: my $include=1;
1016: if (($filters{'username'}) && ($uname ne $filters{'username'}))
1017: { $include=0; }
1018: if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
1019: { $include=0; }
1020: if (($filters{'url'}) && ($res!~/$filters{'url'}/))
1021: { $include=0; }
1022: if (($filters{'start'}) && ($time<$filters{'start'}))
1023: { $include=0; }
1024: if (($filters{'end'}) && ($time>$filters{'end'}))
1025: { $include=0; }
1026: if (($filters{'action'} eq 'view') && ($action))
1027: { $include=0; }
1028: if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
1029: { $include=0; }
1030: if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
1031: { $include=0; }
1032: if ($include) {
1033: push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
1034: $uname.':'.$udom.':'.
1035: $action.':'.$values);
1036: }
1037: }
1038: }
1039: close IN;
1040: return join('&',sort(@results));
1041: }
1042:
1043: ########################################################
1044: ########################################################
1045:
1046: =pod
1047:
1048: =item &userlog
1049:
1050: Inputs: $path, $command
1051:
1052: Returns: unescaped string of values.
1.40 harris41 1053:
1.51 matthew 1054: =cut
1.40 harris41 1055:
1.51 matthew 1056: ########################################################
1057: ########################################################
1058: sub userlog {
1059: my ($path,$command)=@_;
1060: my %filters=();
1061: foreach (split(/\:/,&unescape($command))) {
1062: my ($name,$value)=split(/\=/,$_);
1063: $filters{$name}=$value;
1064: }
1065: my @results=();
1066: open(IN,$path.'/activity.log') or return ('file_error');
1067: while (my $line=<IN>) {
1068: chomp($line);
1069: my ($timestamp,$host,$log)=split(/\:/,$line);
1070: $log=&unescape($log);
1071: my $include=1;
1072: if (($filters{'start'}) && ($timestamp<$filters{'start'}))
1073: { $include=0; }
1074: if (($filters{'end'}) && ($timestamp>$filters{'end'}))
1075: { $include=0; }
1.80 raeburn 1076: if (($filters{'action'} eq 'Role') && ($log !~/^Role/))
1077: { $include=0; }
1.51 matthew 1078: if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
1079: if (($filters{'action'} eq 'check') && ($log!~/^Check/))
1080: { $include=0; }
1081: if ($include) {
1.80 raeburn 1082: push(@results,$timestamp.':'.$host.':'.&escape($log));
1.51 matthew 1083: }
1084: }
1085: close IN;
1086: return join('&',sort(@results));
1.52 matthew 1087: }
1088:
1089: ########################################################
1090: ########################################################
1091:
1092: =pod
1093:
1094: =item Functions required for forking
1095:
1096: =over 4
1097:
1098: =item REAPER
1099:
1100: REAPER takes care of dead children.
1101:
1102: =item HUNTSMAN
1103:
1104: Signal handler for SIGINT.
1105:
1106: =item HUPSMAN
1107:
1108: Signal handler for SIGHUP
1109:
1110: =item DISCONNECT
1111:
1112: Disconnects from database.
1113:
1114: =back
1115:
1116: =cut
1117:
1118: ########################################################
1119: ########################################################
1120: sub REAPER { # takes care of dead children
1121: $SIG{CHLD} = \&REAPER;
1122: my $pid = wait;
1123: $children --;
1124: &logthis("Child $pid died");
1125: delete $children{$pid};
1126: }
1127:
1128: sub HUNTSMAN { # signal handler for SIGINT
1129: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1130: kill 'INT' => keys %children;
1131: my $execdir=$perlvar{'lonDaemons'};
1132: unlink("$execdir/logs/lonsql.pid");
1.59 albertel 1133: &logthis("<font color='red'>CRITICAL: Shutting down</font>");
1.52 matthew 1134: $unixsock = "mysqlsock";
1135: my $port="$perlvar{'lonSockDir'}/$unixsock";
1136: unlink($port);
1137: exit; # clean up with dignity
1138: }
1139:
1140: sub HUPSMAN { # signal handler for SIGHUP
1141: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
1142: kill 'INT' => keys %children;
1143: close($server); # free up socket
1.59 albertel 1144: &logthis("<font color='red'>CRITICAL: Restarting</font>");
1.52 matthew 1145: my $execdir=$perlvar{'lonDaemons'};
1146: $unixsock = "mysqlsock";
1147: my $port="$perlvar{'lonSockDir'}/$unixsock";
1148: unlink($port);
1149: exec("$execdir/lonsql"); # here we go again
1150: }
1151:
1152: sub DISCONNECT {
1153: $dbh->disconnect or
1.59 albertel 1154: &logthis("<font color='blue'>WARNING: Couldn't disconnect from database ".
1.52 matthew 1155: " $DBI::errstr : $@</font>");
1156: exit;
1.51 matthew 1157: }
1.40 harris41 1158:
1159:
1.51 matthew 1160: =pod
1.40 harris41 1161:
1.51 matthew 1162: =back
1.40 harris41 1163:
1164: =cut
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