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[LON-CAPA] /
loncom /
lonsql
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1.94:
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Wed Aug 5 18:47:12 2015 UTC (9 years, 4 months ago) by
raeburn
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CVS tags:
HEAD
- Bug 5596.
Add a routine to lonnet.pm -- get_multiple_instusers() which makes one call
to lond > lonsql > localenroll.pm to retrieve institutional data
for multiple users when adding users via file upload, to minimize number
of sleep() commands needed. Supports up to 1s per query, on localenroll.pm
side if adding more than 100 new users.
- Add new routine to localenroll.pm -- &get_multusersinfo() -- to retrieve
institutional data for users being added via user file upload.
Note: if this routine does not exist in localenroll.pm, will fall-back
to retrieving institutional data using a separate call to &get_userinfo()
for each user.
#!/usr/bin/perl
# The LearningOnline Network
# lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
#
# $Id: lonsql,v 1.94 2015/08/05 18:47:12 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
=pod
=head1 NAME
lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
=head1 SYNOPSIS
This script should be run as user=www.
Note that a lonsql.pid file contains the pid of the parent process.
=head1 OVERVIEW
=head2 Purpose within LON-CAPA
LON-CAPA is meant to distribute A LOT of educational content to A LOT
of people. It is ineffective to directly rely on contents within the
ext2 filesystem to be speedily scanned for on-the-fly searches of
content descriptions. (Simply put, it takes a cumbersome amount of
time to open, read, analyze, and close thousands of files.)
The solution is to index various data fields that are descriptive of
the educational resources on a LON-CAPA server machine in a
database. Descriptive data fields are referred to as "metadata". The
question then arises as to how this metadata is handled in terms of
the rest of the LON-CAPA network without burdening client and daemon
processes.
The obvious solution, using lonc to send a query to a lond process,
doesn't work so well in general as you can see in the following
example:
lonc= loncapa client process A-lonc= a lonc process on Server A
lond= loncapa daemon process
database command
A-lonc --------TCP/IP----------------> B-lond
The problem emerges that A-lonc and B-lond are kept waiting for the
MySQL server to "do its stuff", or in other words, perform the
conceivably sophisticated, data-intensive, time-sucking database
transaction. By tying up a lonc and lond process, this significantly
cripples the capabilities of LON-CAPA servers.
The solution is to offload the work onto another process, and use
lonc and lond just for requests and notifications of completed
processing:
database command
A-lonc ---------TCP/IP-----------------> B-lond =====> B-lonsql
<---------------------------------/ |
"ok, I'll get back to you..." |
|
/
A-lond <------------------------------- B-lonc <======
"Guess what? I have the result!"
Of course, depending on success or failure, the messages may vary, but
the principle remains the same where a separate pool of children
processes (lonsql's) handle the MySQL database manipulations.
Thus, lonc and lond spend effectively no time waiting on results from
the database.
=head1 Internals
=cut
use strict;
use lib '/home/httpd/lib/perl/';
use LONCAPA;
use LONCAPA::Configuration;
use LONCAPA::lonmetadata();
use Apache::lonnet;
use IO::Socket;
use Symbol;
use POSIX;
use IO::Select;
use DBI;
use File::Find;
use localenroll;
use GDBM_File;
########################################################
########################################################
=pod
=over 4
=item Global Variables
=over 4
=item dbh
=back
=cut
########################################################
########################################################
my $dbh;
########################################################
########################################################
=pod
=item Variables required for forking
=over 4
=item $MAX_CLIENTS_PER_CHILD
The number of clients each child should process.
=item %children
The keys to %children are the current child process IDs
=item $children
The current number of children
=back
=cut
########################################################
########################################################
my $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should process
my %children = (); # keys are current child process IDs
my $children = 0; # current number of children
###################################################################
###################################################################
=pod
=item Main body of code.
=over 4
=item Read data from loncapa_apache.conf and loncapa.conf.
=item Ensure we can access the database.
=item Determine if there are other instances of lonsql running.
=item Read the hosts file.
=item Create a socket for lonsql.
=item Fork once and dissociate from parent.
=item Write PID to disk.
=item Prefork children and maintain the population of children.
=back
=cut
###################################################################
###################################################################
my $childmaxattempts=10;
my $run =0; # running counter to generate the query-id
#
# Read loncapa_apache.conf and loncapa.conf
#
my %perlvar=%{&LONCAPA::Configuration::read_conf('loncapa.conf')};
#
# Write the /home/www/.my.cnf file
my $conf_file = '/home/www/.my.cnf';
if (! -e $conf_file) {
if (open MYCNF, ">$conf_file") {
print MYCNF <<"ENDMYCNF";
[client]
user=www
password=$perlvar{'lonSqlAccess'}
ENDMYCNF
close MYCNF;
} else {
warn "Unable to write $conf_file, continuing";
}
}
#
# Make sure that database can be accessed
#
my $dbh;
unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
$perlvar{'lonSqlAccess'},
{ RaiseError =>0,PrintError=>0})) {
print "Cannot connect to database!\n";
my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!";
system("echo 'Cannot connect to MySQL database!' |".
" mailto $emailto -s '$subj' > /dev/null");
open(SMP,">$perlvar{'lonDocRoot'}/lon-status/mysql.txt");
print SMP 'time='.time.'&mysql=defunct'."\n";
close(SMP);
exit 1;
} else {
unlink("$perlvar{'lonDocRoot'}/lon-status/mysql.txt");
$dbh->disconnect;
}
#
# Check if other instance running
#
my $pidfile="$perlvar{'lonDaemons'}/logs/lonsql.pid";
if (-e $pidfile) {
open(my $lfh,"$pidfile");
my $pide=<$lfh>;
chomp($pide);
if (kill 0 => $pide) { die "already running"; }
}
my $PREFORK=4; # number of children to maintain, at least four spare
#
#$PREFORK=int($PREFORK/4);
#
# Create a socket to talk to lond
#
my $unixsock = "mysqlsock";
my $localfile="$perlvar{'lonSockDir'}/$unixsock";
my $server;
unlink ($localfile);
unless ($server=IO::Socket::UNIX->new(Local =>"$localfile",
Type => SOCK_STREAM,
Listen => 10)) {
print "in socket error:$@\n";
}
#
# Fork once and dissociate
#
my $fpid=fork;
exit if $fpid;
die "Couldn't fork: $!" unless defined ($fpid);
POSIX::setsid() or die "Can't start new session: $!";
#
# Write our PID on disk
my $execdir=$perlvar{'lonDaemons'};
open (PIDSAVE,">$execdir/logs/lonsql.pid");
print PIDSAVE "$$\n";
close(PIDSAVE);
&logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>");
#
# Ignore signals generated during initial startup
$SIG{HUP}=$SIG{USR1}='IGNORE';
# Now we are on our own
# Fork off our children.
for (1 .. $PREFORK) {
make_new_child();
}
#
# Install signal handlers.
$SIG{CHLD} = \&REAPER;
$SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
$SIG{HUP} = \&HUPSMAN;
#
# And maintain the population.
while (1) {
sleep; # wait for a signal (i.e., child's death)
for (my $i = $children; $i < $PREFORK; $i++) {
make_new_child(); # top up the child pool
}
}
########################################################
########################################################
=pod
=item &make_new_child
Inputs: None
Returns: None
=cut
########################################################
########################################################
sub make_new_child {
my $pid;
my $sigset;
#
# block signal for fork
$sigset = POSIX::SigSet->new(SIGINT);
sigprocmask(SIG_BLOCK, $sigset)
or die "Can't block SIGINT for fork: $!\n";
#
die "fork: $!" unless defined ($pid = fork);
#
if ($pid) {
# Parent records the child's birth and returns.
sigprocmask(SIG_UNBLOCK, $sigset)
or die "Can't unblock SIGINT for fork: $!\n";
$children{$pid} = 1;
$children++;
return;
} else {
# Child can *not* return from this subroutine.
$SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
# unblock signals
sigprocmask(SIG_UNBLOCK, $sigset)
or die "Can't unblock SIGINT for fork: $!\n";
#open database handle
# making dbh global to avoid garbage collector
unless ($dbh = DBI->connect("DBI:mysql:loncapa","www",
$perlvar{'lonSqlAccess'},
{ RaiseError =>0,PrintError=>0})) {
sleep(10+int(rand(20)));
&logthis("<font color='blue'>WARNING: Couldn't connect to database".
": $@</font>");
# "($st secs): $@</font>");
print "database handle error\n";
exit;
}
# make sure that a database disconnection occurs with
# ending kill signals
$SIG{TERM}=$SIG{INT}=$SIG{QUIT}=$SIG{__DIE__}=\&DISCONNECT;
# handle connections until we've reached $MAX_CLIENTS_PER_CHILD
for (my $i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
my $client = $server->accept() or last;
# do something with the connection
$run = $run+1;
my $userinput = <$client>;
chomp($userinput);
$userinput=~s/\:($LONCAPA::domain_re)$//;
my $searchdomain=$1;
#
my ($conserver,$query,
$arg1,$arg2,$arg3)=split(/&/,$userinput);
my $query=unescape($query);
#
#send query id which is pid_unixdatetime_runningcounter
my $queryid = &Apache::lonnet::hostname($perlvar{'lonHostID'});
$queryid .="_".($$)."_";
$queryid .= time."_";
$queryid .= $run;
print $client "$queryid\n";
#
# &logthis("QUERY: $query - $arg1 - $arg2 - $arg3 - $queryid");
# sleep 1;
#
my $result='';
#
# At this point, query is received, query-ID assigned and sent
# back, $query eq 'logquery' will mean that this is a query
# against log-files
if (($query eq 'userlog') || ($query eq 'courselog')) {
# beginning of log query
my $udom = &unescape($arg1);
my $uname = &unescape($arg2);
my $command = &unescape($arg3);
my $path = &propath($udom,$uname);
if (-e "$path/activity.log") {
if ($query eq 'userlog') {
$result=&userlog($path,$command);
} else {
$result=&courselog($path,$command);
}
$result = &escape($result);
} else {
&logthis('Unable to do log query: '.$uname.'@'.$udom);
$result='no_such_file';
}
# end of log query
} elsif (($query eq 'fetchenrollment') ||
($query eq 'institutionalphotos')) {
# retrieve institutional class lists
my $dom = &unescape($arg1);
my %affiliates = ();
my %replies = ();
my $locresult = '';
my $querystr = &unescape($arg3);
foreach (split/%%/,$querystr) {
if (/^([^=]+)=([^=]+)$/) {
@{$affiliates{$1}} = split/,/,$2;
}
}
if ($query eq 'fetchenrollment') {
$locresult = &localenroll::fetch_enrollment($dom,\%affiliates,\%replies);
} elsif ($query eq 'institutionalphotos') {
my $crs = &unescape($arg2);
eval {
local($SIG{__DIE__})='DEFAULT';
$locresult = &localenroll::institutional_photos($dom,$crs,\%affiliates,\%replies,'update');
};
if ($@) {
$locresult = 'error';
}
}
$result = &escape($locresult.':');
if ($locresult) {
$result .= &escape(join(':',map{$_.'='.$replies{$_}} keys %replies));
}
} elsif ($query eq 'usersearch') {
my ($srchby,$srchtype,$srchterm);
if ((&unescape($arg1) eq $searchdomain) &&
($arg2 =~ /\%\%/)) {
($srchby,$srchtype) =
map {&unescape($_);} (split(/\%\%/,$arg2));
$srchterm = &unescape($arg3);
} else {
($srchby,$srchtype,$srchterm) =
map {&unescape($_);} ($arg1,$arg2,$arg3);
}
$result = &do_user_search($searchdomain,$srchby,
$srchtype,$srchterm);
} elsif ($query eq 'instdirsearch') {
$result = &do_inst_dir_search($searchdomain,$arg1,$arg2,$arg3);
} elsif ($query eq 'getinstuser') {
$result = &get_inst_user($searchdomain,$arg1,$arg2);
} elsif ($query eq 'getmultinstusers') {
$result = &get_multiple_instusers($searchdomain,$arg3);
} elsif ($query eq 'prepare activity log') {
my ($cid,$domain) = map {&unescape($_);} ($arg1,$arg2);
&logthis('preparing activity log tables for '.$cid);
my $command =
qq{$perlvar{'lonDaemons'}/parse_activity_log.pl -course=$cid -domain=$domain};
system($command);
&logthis($command);
my $returnvalue = $?>>8;
if ($returnvalue) {
$result = 'error: parse_activity_log.pl returned '.
$returnvalue;
} else {
$result = 'success';
}
} elsif (($query eq 'portfolio_metadata') ||
($query eq 'portfolio_access')) {
$result = &portfolio_table_update($query,$arg1,$arg2,
$arg3);
} elsif ($query eq 'allusers') {
my ($uname,$udom) = map {&unescape($_);} ($arg1,$arg2);
my %userdata;
my (@data) = split(/\%\%/,$arg3);
foreach my $item (@data) {
my ($key,$value) = split(/=/,$item);
$userdata{$key} = &unescape($value);
}
$userdata{'username'} = $uname;
$userdata{'domain'} = $udom;
$result = &allusers_table_update($query,$uname,$udom,\%userdata);
} else {
# Do an sql query
$result = &do_sql_query($query,$arg1,$arg2,$arg3,$searchdomain);
}
# result does not need to be escaped because it has already been
# escaped.
#$result=&escape($result);
&Apache::lonnet::reply("queryreply:$queryid:$result",$conserver);
}
# tidy up gracefully and finish
#
# close the database handle
$dbh->disconnect
or &logthis("<font color='blue'>WARNING: Couldn't disconnect".
" from database $DBI::errstr : $@</font>");
# this exit is VERY important, otherwise the child will become
# a producer of more and more children, forking yourself into
# process death.
exit;
}
}
sub do_user_search {
my ($domain,$srchby,$srchtype,$srchterm) = @_;
my $result;
my $quoted_dom = $dbh->quote( $domain );
my ($query,$quoted_srchterm,@fields);
my ($table_columns,$table_indices) =
&LONCAPA::lonmetadata::describe_metadata_storage('allusers');
foreach my $coldata (@{$table_columns}) {
push(@fields,$coldata->{'name'});
}
my $fieldlist = join(',',@fields);
$query = "SELECT $fieldlist FROM allusers WHERE (domain = $quoted_dom AND ";
if ($srchby eq 'lastfirst') {
my ($fraglast,$fragfirst) = split(/,/,$srchterm);
$fragfirst =~ s/^\s+//;
$fraglast =~ s/\s+$//;
if ($srchtype eq 'exact') {
$query .= 'lastname = '.$dbh->quote($fraglast).
' AND firstname = '.$dbh->quote($fragfirst);
} elsif ($srchtype eq 'begins') {
$query .= 'lastname LIKE '.$dbh->quote($fraglast.'%').
' AND firstname LIKE '.$dbh->quote($fragfirst.'%');
} else {
$query .= 'lastname LIKE '.$dbh->quote('%'.$fraglast.'%').
' AND firstname LIKE '.$dbh->quote('%'.$fragfirst.'%');
}
} else {
my %srchfield = (
uname => 'username',
lastname => 'lastname',
);
if ($srchtype eq 'exact') {
$query .= $srchfield{$srchby}.' = '.$dbh->quote($srchterm);
} elsif ($srchtype eq 'begins') {
$query .= $srchfield{$srchby}.' LIKE '.$dbh->quote($srchterm.'%');
} else {
$query .= $srchfield{$srchby}.' LIKE '.$dbh->quote('%'.$srchterm.'%');
}
}
$query .= ") ORDER BY username ";
my $sth = $dbh->prepare($query);
if ($sth->execute()) {
my @results;
while (my @row = $sth->fetchrow_array) {
my @items;
for (my $i=0; $i<@row; $i++) {
push(@items,&escape($fields[$i]).'='.&escape($row[$i]));
}
my $userstr = join(':', @items);
push(@results,&escape($userstr));
}
$sth->finish;
$result = join('&',@results);
} else {
&logthis('<font color="blue">'.
'WARNING: Could not retrieve from database:'.
$sth->errstr().'</font>');
}
return $result;
}
sub do_inst_dir_search {
my ($domain,$srchby,$srchterm,$srchtype) = @_;
$srchby = &unescape($srchby);
$srchterm = &unescape($srchterm);
$srchtype = &unescape($srchtype);
my (%instusers,%instids,$result,$response);
eval {
local($SIG{__DIE__})='DEFAULT';
$result=&localenroll::get_userinfo($domain,undef,undef,\%instusers,
\%instids,undef,$srchby,$srchterm,
$srchtype);
};
if ($result eq 'ok') {
if (%instusers) {
foreach my $key (keys(%instusers)) {
my $usrstr = &Apache::lonnet::freeze_escape($instusers{$key});
$response .=&escape(&escape($key).'='.$usrstr).'&';
}
}
$response=~s/\&$//;
} else {
$response = 'unavailable';
}
return $response;
}
sub get_inst_user {
my ($domain,$uname,$id) = @_;
$uname = &unescape($uname);
$id = &unescape($id);
my (%instusers,%instids,$result,$response);
eval {
local($SIG{__DIE__})='DEFAULT';
$result=&localenroll::get_userinfo($domain,$uname,$id,\%instusers,
\%instids);
};
if ($result eq 'ok') {
if (keys(%instusers) > 0) {
foreach my $key (keys(%instusers)) {
my $usrstr = &Apache::lonnet::freeze_escape($instusers{$key});
$response .= &escape(&escape($key).'='.$usrstr).'&';
}
}
$response=~s/\&$//;
} else {
$response = 'unavailable';
}
return $response;
}
sub get_multiple_instusers {
my ($domain,$data) = @_;
my ($type,$users) = split(/=/,$data,2);
my $requested = &Apache::lonnet::thaw_unescape($users);
my $response;
if (ref($requested) eq 'HASH') {
my (%instusers,%instids,$result);
eval {
local($SIG{__DIE__})='DEFAULT';
$result=&localenroll::get_multusersinfo($domain,$type,$requested,\%instusers,
\%instids);
};
if ($@) {
$response = 'error';
} elsif ($result eq 'ok') {
if (keys(%instusers)) {
$response = $result.':'.&Apache::lonnet::freeze_escape(\%instusers);
}
} else {
$response = 'unavailable';
}
} else {
$response = 'invalid';
}
return $response;
}
########################################################
########################################################
=pod
=item &do_sql_query
Runs an sql metadata table query.
Inputs: $query, $custom, $customshow
Returns: A string containing escaped results.
=cut
########################################################
########################################################
{
my @metalist;
sub process_file {
if ( -e $_ && # file exists
-f $_ && # and is a normal file
/\.meta$/ && # ends in meta
! /^.+\.\d+\.[^\.]+\.meta$/ # is not a previous version
) {
push(@metalist,$File::Find::name);
}
}
sub do_sql_query {
my ($query,$custom,$customshow,$domainstr,$searchdomain) = @_;
#
# limit to searchdomain if given and table is metadata
#
if ($domainstr && ($query=~/FROM metadata/)) {
my $havingstr;
$domainstr = &unescape($domainstr);
if ($domainstr =~ /,/) {
foreach my $dom (split(/,/,$domainstr)) {
if ($dom =~ /^$LONCAPA::domain_re$/) {
$havingstr .= 'domain="'.$dom.'" OR ';
}
}
$havingstr =~ s/ OR $//;
} else {
if ($domainstr =~ /^$LONCAPA::domain_re$/) {
$havingstr = 'domain="'.$domainstr.'"';
}
}
if ($havingstr) {
$query.=' HAVING ('.$havingstr.')';
}
} elsif (($searchdomain) && ($query=~/FROM metadata/)) {
$query.=' HAVING (domain="'.$searchdomain.'")';
}
# &logthis('doing query ('.$searchdomain.')'.$query);
$custom = &unescape($custom);
$customshow = &unescape($customshow);
#
@metalist = ();
#
my $result = '';
my @results = ();
my @files;
my $subsetflag=0;
#
if ($query) {
#prepare and execute the query
my $sth = $dbh->prepare($query);
unless ($sth->execute()) {
&logthis('<font color="blue">'.
'WARNING: Could not retrieve from database:'.
$sth->errstr().'</font>');
} else {
my $aref=$sth->fetchall_arrayref;
foreach my $row (@$aref) {
push @files,@{$row}[3] if ($custom or $customshow);
my @b=map { &escape($_); } @$row;
push @results,join(",", @b);
# Build up the @files array with the LON-CAPA urls
# of the resources.
}
}
}
# do custom metadata searching here and build into result
return join("&",@results) if (! ($custom or $customshow));
# Only get here if there is a custom query or custom show request
&logthis("Doing custom query for $custom");
if ($query) {
@metalist=map {
$perlvar{'lonDocRoot'}.$_.'.meta';
} @files;
} else {
my $dir = "$perlvar{'lonDocRoot'}/res/$perlvar{'lonDefDomain'}";
@metalist=();
opendir(RESOURCES,$dir);
my @homeusers=grep {
&ishome($dir.'/'.$_);
} grep {!/^\.\.?$/} readdir(RESOURCES);
closedir RESOURCES;
# Define the
foreach my $user (@homeusers) {
find (\&process_file,$dir.'/'.$user);
}
}
# if file is indicated in sql database and
# not part of sql-relevant query, do not pattern match.
#
# if file is not in sql database, output error.
#
# if file is indicated in sql database and is
# part of query result list, then do the pattern match.
my $customresult='';
my @results;
foreach my $metafile (@metalist) {
open(my $fh,$metafile);
my @lines=<$fh>;
my $stuff=join('',@lines);
if ($stuff=~/$custom/s) {
foreach my $f ('abstract','author','copyright',
'creationdate','keywords','language',
'lastrevisiondate','mime','notes',
'owner','subject','title') {
$stuff=~s/\n?\<$f[^\>]*\>.*?<\/$f[^\>]*\>\n?//s;
}
my $mfile=$metafile;
my $docroot=$perlvar{'lonDocRoot'};
$mfile=~s/^$docroot//;
$mfile=~s/\.meta$//;
unless ($query) {
my $q2="SELECT * FROM metadata WHERE url ".
" LIKE BINARY '?'";
my $sth = $dbh->prepare($q2);
$sth->execute($mfile);
my $aref=$sth->fetchall_arrayref;
foreach my $a (@$aref) {
my @b=map { &escape($_)} @$a;
push @results,join(",", @b);
}
}
# &logthis("found: $stuff");
$customresult.='&custom='.&escape($mfile).','.
escape($stuff);
}
}
$result=join("&",@results) unless $query;
$result.=$customresult;
#
return $result;
} # End of &do_sql_query
} # End of scoping curly braces for &process_file and &do_sql_query
sub portfolio_table_update {
my ($query,$arg1,$arg2,$arg3) = @_;
my %tablenames = (
'portfolio' => 'portfolio_metadata',
'access' => 'portfolio_access',
'addedfields' => 'portfolio_addedfields',
);
my $result = 'ok';
my $tablechk = &check_table($query);
if ($tablechk == 0) {
my $request =
&LONCAPA::lonmetadata::create_metadata_storage($query,$query);
$dbh->do($request);
if ($dbh->err) {
&logthis("create $query".
" ERROR: ".$dbh->errstr);
$result = 'error';
}
}
if ($result eq 'ok') {
my ($uname,$udom,$group) = split(/:/,&unescape($arg1));
my $file_name = &unescape($arg2);
my $action = $arg3;
my $is_course = 0;
if ($group ne '') {
$is_course = 1;
}
my $urlstart = '/uploaded/'.$udom.'/'.$uname;
my $pathstart = &propath($udom,$uname).'/userfiles';
my ($fullpath,$url);
if ($is_course) {
$fullpath = $pathstart.'/groups/'.$group.'/portfolio'.
$file_name;
$url = $urlstart.'/groups/'.$group.'/portfolio'.$file_name;
} else {
$fullpath = $pathstart.'/portfolio'.$file_name;
$url = $urlstart.'/portfolio'.$file_name;
}
if ($query eq 'portfolio_metadata') {
if ($action eq 'delete') {
my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
} elsif (-e $fullpath.'.meta') {
my %loghash = &LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group,'update');
if (keys(%loghash) > 0) {
&portfolio_logging(%loghash);
}
}
} elsif ($query eq 'portfolio_access') {
my %access = &get_access_hash($uname,$udom,$group.$file_name);
my %loghash =
&LONCAPA::lonmetadata::process_portfolio_access_data($dbh,undef,
\%tablenames,$url,$fullpath,\%access,'update');
if (keys(%loghash) > 0) {
&portfolio_logging(%loghash);
} else {
my $available = 0;
foreach my $key (keys(%access)) {
my ($num,$scope,$end,$start) =
($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
if ($scope eq 'public' || $scope eq 'guest') {
$available = 1;
last;
}
}
if ($available) {
# Retrieve current values
my $condition = 'url='.$dbh->quote("$url");
my ($error,$row) =
&LONCAPA::lonmetadata::lookup_metadata($dbh,$condition,undef,
'portfolio_metadata');
if (!$error) {
if (!(ref($row->[0]) eq 'ARRAY')) {
my %loghash =
&LONCAPA::lonmetadata::process_portfolio_metadata($dbh,undef,
\%tablenames,$url,$fullpath,$is_course,$udom,$uname,$group);
if (keys(%loghash) > 0) {
&portfolio_logging(%loghash);
}
}
}
}
}
}
}
return $result;
}
sub get_access_hash {
my ($uname,$udom,$file) = @_;
my $hashref = &tie_user_hash($udom,$uname,'file_permissions',
&GDBM_READER());
my %curr_perms;
my %access;
if ($hashref) {
while (my ($key,$value) = each(%$hashref)) {
$key = &unescape($key);
next if ($key =~ /^error: 2 /);
$curr_perms{$key}=&Apache::lonnet::thaw_unescape($value);
}
if (!&untie_user_hash($hashref)) {
&logthis("error: ".($!+0)." untie (GDBM) Failed");
}
} else {
&logthis("error: ".($!+0)." tie (GDBM) Failed");
}
if (keys(%curr_perms) > 0) {
if (ref($curr_perms{$file."\0".'accesscontrol'}) eq 'HASH') {
foreach my $acl (keys(%{$curr_perms{$file."\0".'accesscontrol'}})) {
$access{$acl} = $curr_perms{$file."\0".$acl};
}
}
}
return %access;
}
sub allusers_table_update {
my ($query,$uname,$udom,$userdata) = @_;
my %tablenames = (
'allusers' => 'allusers',
);
my $result = 'ok';
my $tablechk = &check_table($query);
if ($tablechk == 0) {
my $request =
&LONCAPA::lonmetadata::create_metadata_storage($query,$query);
$dbh->do($request);
if ($dbh->err) {
&logthis("create $query".
" ERROR: ".$dbh->errstr);
$result = 'error';
}
}
if ($result eq 'ok') {
my %loghash =
&LONCAPA::lonmetadata::process_allusers_data($dbh,undef,
\%tablenames,$uname,$udom,$userdata,'update');
foreach my $key (keys(%loghash)) {
&logthis($loghash{$key});
}
}
return $result;
}
###########################################
sub check_table {
my ($table_id) = @_;
my $sth=$dbh->prepare('SHOW TABLES');
$sth->execute();
my $aref = $sth->fetchall_arrayref;
$sth->finish();
if ($sth->err()) {
&logthis("fetchall_arrayref after SHOW TABLES".
" ERROR: ".$sth->errstr);
return undef;
}
my $result = 0;
foreach my $table (@{$aref}) {
if ($table->[0] eq $table_id) {
$result = 1;
last;
}
}
return $result;
}
###########################################
sub portfolio_logging {
my (%portlog) = @_;
foreach my $key (keys(%portlog)) {
if (ref($portlog{$key}) eq 'HASH') {
foreach my $item (keys(%{$portlog{$key}})) {
&logthis($portlog{$key}{$item});
}
}
}
}
########################################################
########################################################
=pod
=item &logthis
Inputs: $message, the message to log
Returns: nothing
Writes $message to the logfile.
=cut
########################################################
########################################################
sub logthis {
my $message=shift;
my $execdir=$perlvar{'lonDaemons'};
open(my $fh,">>$execdir/logs/lonsql.log");
my $now=time;
my $local=localtime($now);
print $fh "$local ($$): $message\n";
}
########################################################
########################################################
=pod
=item &ishome
Determine if the current machine is the home server for a user.
The determination is made by checking the filesystem for the users information.
Inputs: $author
Returns: 0 - this is not the authors home server, 1 - this is.
=cut
########################################################
########################################################
sub ishome {
my $author=shift;
$author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
my ($udom,$uname)=split(/\//,$author);
my $proname=propath($udom,$uname);
if (-e $proname) {
return 1;
} else {
return 0;
}
}
########################################################
########################################################
=pod
=item &courselog
Inputs: $path, $command
Returns: unescaped string of values.
=cut
########################################################
########################################################
sub courselog {
my ($path,$command)=@_;
my %filters=();
foreach (split(/\:/,&unescape($command))) {
my ($name,$value)=split(/\=/,$_);
$filters{$name}=$value;
}
my @results=();
open(IN,$path.'/activity.log') or return ('file_error');
while (my $line=<IN>) {
chomp($line);
my ($timestamp,$host,$log)=split(/\:/,$line);
#
# $log has the actual log entries; currently still escaped, and
# %26(timestamp)%3a(url)%3a(user)%3a(domain)
# then additionally
# %3aPOST%3a(name)%3d(value)%3a(name)%3d(value)
# or
# %3aCSTORE%3a(name)%3d(value)%26(name)%3d(value)
#
# get delimiter between timestamped entries to be &&&
$log=~s/\%26(\d+)\%3a/\&\&\&$1\%3a/g;
# now go over all log entries
foreach (split(/\&\&\&/,&unescape($log))) {
my ($time,$res,$uname,$udom,$action,@values)=split(/\:/,$_);
my $values=&unescape(join(':',@values));
$values=~s/\&/\:/g;
$res=&unescape($res);
my $include=1;
if (($filters{'username'}) && ($uname ne $filters{'username'}))
{ $include=0; }
if (($filters{'domain'}) && ($udom ne $filters{'domain'}))
{ $include=0; }
if (($filters{'url'}) && ($res!~/$filters{'url'}/))
{ $include=0; }
if (($filters{'start'}) && ($time<$filters{'start'}))
{ $include=0; }
if (($filters{'end'}) && ($time>$filters{'end'}))
{ $include=0; }
if (($filters{'action'} eq 'view') && ($action))
{ $include=0; }
if (($filters{'action'} eq 'submit') && ($action ne 'POST'))
{ $include=0; }
if (($filters{'action'} eq 'grade') && ($action ne 'CSTORE'))
{ $include=0; }
if ($include) {
push(@results,($time<1000000000?'0':'').$time.':'.$res.':'.
$uname.':'.$udom.':'.
$action.':'.$values);
}
}
}
close IN;
return join('&',sort(@results));
}
########################################################
########################################################
=pod
=item &userlog
Inputs: $path, $command
Returns: unescaped string of values.
=cut
########################################################
########################################################
sub userlog {
my ($path,$command)=@_;
my %filters=();
foreach (split(/\:/,&unescape($command))) {
my ($name,$value)=split(/\=/,$_);
$filters{$name}=$value;
}
my @results=();
open(IN,$path.'/activity.log') or return ('file_error');
while (my $line=<IN>) {
chomp($line);
my ($timestamp,$host,$log)=split(/\:/,$line);
$log=&unescape($log);
my $include=1;
if (($filters{'start'}) && ($timestamp<$filters{'start'}))
{ $include=0; }
if (($filters{'end'}) && ($timestamp>$filters{'end'}))
{ $include=0; }
if (($filters{'action'} eq 'Role') && ($log !~/^Role/))
{ $include=0; }
if (($filters{'action'} eq 'log') && ($log!~/^Log/)) { $include=0; }
if (($filters{'action'} eq 'check') && ($log!~/^Check/))
{ $include=0; }
if ($include) {
push(@results,$timestamp.':'.$host.':'.&escape($log));
}
}
close IN;
return join('&',sort(@results));
}
########################################################
########################################################
=pod
=item Functions required for forking
=over 4
=item REAPER
REAPER takes care of dead children.
=item HUNTSMAN
Signal handler for SIGINT.
=item HUPSMAN
Signal handler for SIGHUP
=item DISCONNECT
Disconnects from database.
=back
=cut
########################################################
########################################################
sub REAPER { # takes care of dead children
$SIG{CHLD} = \&REAPER;
my $pid = wait;
$children --;
&logthis("Child $pid died");
delete $children{$pid};
}
sub HUNTSMAN { # signal handler for SIGINT
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
kill 'INT' => keys %children;
my $execdir=$perlvar{'lonDaemons'};
unlink("$execdir/logs/lonsql.pid");
&logthis("<font color='red'>CRITICAL: Shutting down</font>");
$unixsock = "mysqlsock";
my $port="$perlvar{'lonSockDir'}/$unixsock";
unlink($port);
exit; # clean up with dignity
}
sub HUPSMAN { # signal handler for SIGHUP
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
kill 'INT' => keys %children;
close($server); # free up socket
&logthis("<font color='red'>CRITICAL: Restarting</font>");
my $execdir=$perlvar{'lonDaemons'};
$unixsock = "mysqlsock";
my $port="$perlvar{'lonSockDir'}/$unixsock";
unlink($port);
exec("$execdir/lonsql"); # here we go again
}
sub DISCONNECT {
$dbh->disconnect or
&logthis("<font color='blue'>WARNING: Couldn't disconnect from database ".
" $DBI::errstr : $@</font>");
exit;
}
=pod
=back
=cut
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