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Diff for /loncom/lonsql between versions 1.40 and 1.50

version 1.40, 2001/11/29 14:59:52 version 1.50, 2002/07/05 15:07:59
Line 3 Line 3
 # The LearningOnline Network  # The LearningOnline Network
 # lonsql - LON TCP-MySQL-Server Daemon for handling database requests.  # lonsql - LON TCP-MySQL-Server Daemon for handling database requests.
 #  #
   # $Id$
   #
   # 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/
   #
 # YEAR=2000  # YEAR=2000
 # lonsql-based on the preforker:harsha jagasia:date:5/10/00  # lonsql-based on the preforker:harsha jagasia:date:5/10/00
 # 7/25 Gerd Kortemeyer  # 7/25 Gerd Kortemeyer
Line 11 Line 35
 # many different dates Scott Harrison  # many different dates Scott Harrison
 # 03/22/2001 Scott Harrison  # 03/22/2001 Scott Harrison
 # 8/30 Gerd Kortemeyer  # 8/30 Gerd Kortemeyer
 # 10/17,11/28,11/29 Scott Harrison  # 10/17,11/28,11/29,12/20 Scott Harrison
   # YEAR=2001
   # 5/11 Scott Harrison
 #  #
 # $Id$  
 ###  ###
   
 ###############################################################################  ###############################################################################
Line 21 Line 46
 ## ORGANIZATION OF THIS PERL SCRIPT                                          ##  ## ORGANIZATION OF THIS PERL SCRIPT                                          ##
 ## 1. Modules used                                                           ##  ## 1. Modules used                                                           ##
 ## 2. Enable find subroutine                                                 ##  ## 2. Enable find subroutine                                                 ##
 ## 3. Read httpd access.conf and get variables                               ##  ## 3. Read httpd config files and get variables                              ##
 ## 4. Make sure that database can be accessed                                ##  ## 4. Make sure that database can be accessed                                ##
 ## 5. Make sure this process is running from user=www                        ##  ## 5. Make sure this process is running from user=www                        ##
 ## 6. Check if other instance is running                                     ##  ## 6. Check if other instance is running                                     ##
Line 29 Line 54
 ##                                                                           ##  ##                                                                           ##
 ###############################################################################  ###############################################################################
   
   use lib '/home/httpd/lib/perl/';
   use LONCAPA::Configuration;
   
 use IO::Socket;  use IO::Socket;
 use Symbol;  use Symbol;
 use POSIX;  use POSIX;
Line 52  sub wanted { Line 80  sub wanted {
 $childmaxattempts=10;  $childmaxattempts=10;
 $run =0;#running counter to generate the query-id  $run =0;#running counter to generate the query-id
   
 # ------------------------------------ Read httpd access.conf and get variables  # -------------------------------- Read loncapa_apache.conf and loncapa.conf
 open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";  my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
                                                    'loncapa.conf');
 while ($configline=<CONFIG>) {  my %perlvar=%{$perlvarref};
     if ($configline =~ /PerlSetVar/) {  
  my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);  
         chomp($varvalue);  
         $perlvar{$varname}=$varvalue;  
     }  
 }  
 close(CONFIG);  
   
 # ------------------------------------- Make sure that database can be accessed  # ------------------------------------- Make sure that database can be accessed
 {  {
Line 168  sub logthis { Line 189  sub logthis {
     my $local=localtime($now);      my $local=localtime($now);
     print $fh "$local ($$): $message\n";      print $fh "$local ($$): $message\n";
 }  }
   
   # ------------------------------------------------------------------ Course log
   
   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 ($line=<IN>) {
           chomp($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));
   }
   
   # -------------------------------------------------------------------- User log
   
   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 ($line=<IN>) {
           chomp($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 'log') && ($log!~/^Log/)) { $include=0; }
           if (($filters{'action'} eq 'check') && ($log!~/^Check/)) 
                                                                { $include=0; }
           if ($include) {
      push(@results,$timestamp.':'.$log);
           }
       }
       close IN;
       return join('&',sort(@results));
   }
   
   
 # ---------------------------------------------------- Fork once and dissociate  # ---------------------------------------------------- Fork once and dissociate
 $fpid=fork;  $fpid=fork;
 exit if $fpid;  exit if $fpid;
Line 255  sub make_new_child { Line 367  sub make_new_child {
     my $userinput = <$client>;      my $userinput = <$client>;
     chomp($userinput);      chomp($userinput);
                   
     my ($conserver,$querytmp,      my ($conserver,$query,
  $customtmp,$customshowtmp)=split(/&/,$userinput);   $arg1,$arg2,$arg3)=split(/&/,$userinput);
     my $query=unescape($querytmp);      my $query=unescape($query);
     my $custom=unescape($customtmp);  
     my $customshow=unescape($customshowtmp);  
   
             #send query id which is pid_unixdatetime_runningcounter              #send query id which is pid_unixdatetime_runningcounter
     $queryid = $thisserver;      $queryid = $thisserver;
Line 268  sub make_new_child { Line 378  sub make_new_child {
     $queryid .= $run;      $queryid .= $run;
     print $client "$queryid\n";      print $client "$queryid\n";
           
     &logthis("QUERY: $query");      &logthis("QUERY: $query - $arg1 - $arg2 - $arg3");
     &logthis("QUERY: $query");  
     sleep 1;      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
   #
   # this goes against a user's log file
   #
          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,$command);
                      }
                  } else {
      &logthis('Unable to do log query: '.$uname.'@'.$udom);
              $result='no_such_file';
          }
   # ------------------------------------------------------------ end of log query
             } else {
   # -------------------------------------------------------- This is an sql query
       my $custom=unescape($arg1);
       my $customshow=unescape($arg2);
             #prepare and execute the query              #prepare and execute the query
     my $sth = $dbh->prepare($query);      my $sth = $dbh->prepare($query);
     my $result;  
     my @files;      my @files;
     my $subsetflag=0;      my $subsetflag=0;
     if ($query) {      if ($query) {
Line 285  sub make_new_child { Line 425  sub make_new_child {
  else {   else {
     my $r1=$sth->fetchall_arrayref;      my $r1=$sth->fetchall_arrayref;
     my @r2;      my @r2;
     map {my $a=$_;       foreach (@$r1) {my $a=$_; 
  my @b=map {escape($_)} @$a;   my @b=map {escape($_)} @$a;
  push @files,@{$a}[3];   push @files,@{$a}[3];
  push @r2,join(",", @b)   push @r2,join(",", @b)
  } (@$r1);   }
     $result=join("&",@r2);      $result=join("&",@r2);
  }   }
     }      }
Line 337  sub make_new_child { Line 477  sub make_new_child {
     my $sth = $dbh->prepare($q2);      my $sth = $dbh->prepare($q2);
     $sth->execute();      $sth->execute();
     my $r1=$sth->fetchall_arrayref;      my $r1=$sth->fetchall_arrayref;
     map {my $a=$_;       foreach (@$r1) {my $a=$_; 
  my @b=map {escape($_)} @$a;   my @b=map {escape($_)} @$a;
  push @files,@{$a}[3];   push @files,@{$a}[3];
  push @r2,join(",", @b)   push @r2,join(",", @b)
  } (@$r1);   }
  }   }
 # &logthis("found: $stuff");  # &logthis("found: $stuff");
  $customresult.='&custom='.escape($m2).','.escape($stuff);   $customresult.='&custom='.escape($m2).','.escape($stuff);
Line 350  sub make_new_child { Line 490  sub make_new_child {
  $result=join("&",@r2) unless $query;   $result=join("&",@r2) unless $query;
  $result.=$customresult;   $result.=$customresult;
     }      }
     # reply with result  # ------------------------------------------------------------ end of sql query
     $result.="\n" if $result;     }
   
               # result does not need to be escaped because it has already been
               # escaped.
               #$result=&escape($result);
   
       # reply with result, append \n unless already there
   
       $result.="\n" unless ($result=~/\n$/);
             &reply("queryreply:$queryid:$result",$conserver);              &reply("queryreply:$queryid:$result",$conserver);
   
         }          }
Line 491  the parent process. Line 639  the parent process.
   
 =head1 DESCRIPTION  =head1 DESCRIPTION
   
 LON TCP-MySQL-Server Daemon for handling database requests.  Not yet written.
   
 =head1 README  =head1 README
   
 LON TCP-MySQL-Server Daemon for handling database requests.  Not yet written.
   
 =head1 PREREQUISITES  =head1 PREREQUISITES
   
Removed from v.1.40  
changed lines
  Added in v.1.50

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