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Diff for /loncom/lond between versions 1.486 and 1.489

version 1.486, 2012/02/28 15:54:07 version 1.489, 2012/04/11 06:22:04
Line 3245  sub dump_profile_database { Line 3245  sub dump_profile_database {
 #                                             that is matched against  #                                             that is matched against
 #                                             database keywords to do  #                                             database keywords to do
 #                                             selective dumps.  #                                             selective dumps.
   #                               range       - optional range of entries
   #                                             e.g., 10-20 would return the
   #                                             10th to 19th items, etc.  
   #                               extra       - optional ref to hash of
   #                                             additional args. currently
   #                                             skipcheck is only key used.   
 #   $client                   - Channel open on the client.  #   $client                   - Channel open on the client.
 # Returns:  # Returns:
 #    1    - Continue processing.  #    1    - Continue processing.
Line 3279  sub dump_with_regexp { Line 3285  sub dump_with_regexp {
     if ($hashref) {      if ($hashref) {
         my $qresult='';          my $qresult='';
  my $count=0;   my $count=0;
   #
   # When dump is for roles.db, determine if LON-CAPA version checking is needed.
   # Sessions on 2.10 and later will include skipcheck => 1 in extra args ref,
   # to indicate no version checking is needed (in this case, checking occurs
   # on the server hosting the user session, when constructing the roles/courses 
   # screen).
   # 
         if ($extra ne '') {          if ($extra ne '') {
             $extra = &Apache::lonnet::thaw_unescape($extra);              $extra = &Apache::lonnet::thaw_unescape($extra);
             $skipcheck = $extra->{'skipcheck'};              $skipcheck = $extra->{'skipcheck'};
         }          }
         my @ids = &Apache::lonnet::current_machine_ids();          my @ids = &Apache::lonnet::current_machine_ids();
         my (%homecourses,$major,$minor,$now);          my (%homecourses,$major,$minor,$now);
   # 
   # If dump is for roles.db from a pre-2.10 server, determine the LON-CAPA   
   # version on the server which requested the data. For LON-CAPA 2.9, the  
   # client session will have sent its LON-CAPA version when initiating the
   # connection. For LON-CAPA 2.8 and older, the version is retrieved from
   # the global %loncaparevs in lonnet.pm.
   # 
         if (($namespace eq 'roles') && (!$skipcheck)) {          if (($namespace eq 'roles') && (!$skipcheck)) {
             my $loncaparev = $clientversion;              my $loncaparev = $clientversion;
             if ($loncaparev eq '') {              if ($loncaparev eq '') {
Line 3302  sub dump_with_regexp { Line 3322  sub dump_with_regexp {
                     my $cdom = $1;                      my $cdom = $1;
                     my $cnum = $2;                      my $cnum = $2;
                     unless ($skipcheck) {                      unless ($skipcheck) {
                         my ($role,$end,$start) = split(/\_/,$value);                          my ($role,$roleend,$rolestart) = split(/\_/,$value);
                         if (!$end || $end > $now) {                          if (!$roleend || $roleend > $now) {
   #
   # For active course roles, check that requesting server is running a LON-CAPA
   # version which meets any version requirements for the course. Do not include
   # the role amongst the results returned if the requesting server's version is
   # too old.
   #
   # This determination is handled differently depending on whether the course's 
   # homeserver is the current server, or whether it is a different server.
   # In both cases, the course's version requirement needs to be retrieved.
   # 
                             next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,                              next unless (&releasereqd_check($cnum,$cdom,$key,$value,$major,
                                                             $minor,\%homecourses,\@ids));                                                              $minor,\%homecourses,\@ids));
                         }                          }
Line 3326  sub dump_with_regexp { Line 3356  sub dump_with_regexp {
     }      }
  }   }
  if (&untie_user_hash($hashref)) {   if (&untie_user_hash($hashref)) {
   #
   # If dump is for roles.db from a pre-2.10 server, check if the LON-CAPA
   # version requirements for courses for which the current server is the home
   # server permit course roles to be usable on the client server hosting the
   # user's session. If so, include those role results in the data returned to  
   # the client server.
   #
             if (($namespace eq 'roles') && (!$skipcheck)) {              if (($namespace eq 'roles') && (!$skipcheck)) {
                 if (keys(%homecourses) > 0) {                  if (keys(%homecourses) > 0) {
                     $qresult .= &check_homecourses(\%homecourses,$udom,$regexp,$count,                      $qresult .= &check_homecourses(\%homecourses,$regexp,$count,
                                                    $range,$start,$end,$major,$minor);                                                     $range,$start,$end,$major,$minor);
                 }                  }
             }              }
Line 6717  sub is_author { Line 6754  sub is_author {
   
     #  Author role should show up as a key /domain/_au      #  Author role should show up as a key /domain/_au
   
     my $key    = "/$domain/_au";  
     my $value;      my $value;
     if (defined($hashref)) {      if ($hashref) {
  $value = $hashref->{$key};  
     }  
   
     if(defined($value)) {   my $key    = "/$domain/_au";
  &Debug("$user @ $domain is an author");   if (defined($hashref)) {
       $value = $hashref->{$key};
       if(!untie_user_hash($hashref)) {
    return 'error: ' .  ($!+0)." untie (GDBM) Failed";
       }
    }
   
    if(defined($value)) {
       &Debug("$user @ $domain is an author");
    }
       } else {
    return 'error: '.($!+0)." tie (GDBM) Failed";
     }      }
   
     return defined($value);      return defined($value);
Line 7429  sub get_usersession_config { Line 7474  sub get_usersession_config {
     return;      return;
 }  }
   
   #
   # releasereqd_check() will determine if a LON-CAPA version (defined in the
   # $major,$minor args passed) is not too old to allow use of a role in a 
   # course ($cnum,$cdom args passed), if at least one of the following applies: 
   # (a) the course is a Community, (b) the course's home server is *not* the
   # current server, or (c) cached course information is not stale. 
   #
   # For the case where none of these apply, the course is added to the 
   # $homecourse hash ref (keys = courseIDs, values = array of a hash of roles).
   # The $homecourse hash ref is for courses for which the current server is the 
   # home server.  LON-CAPA version requirements are checked elsewhere for the
   # items in $homecourse.
   #
   
 sub releasereqd_check {  sub releasereqd_check {
     my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;      my ($cnum,$cdom,$key,$value,$major,$minor,$homecourses,$ids) = @_;
     my $home = &Apache::lonnet::homeserver($cnum,$cdom);      my $home = &Apache::lonnet::homeserver($cnum,$cdom);
Line 7458  sub releasereqd_check { Line 7517  sub releasereqd_check {
         if (ref($ids) eq 'ARRAY') {          if (ref($ids) eq 'ARRAY') {
             if (grep(/^\Q$home\E$/,@{$ids})) {              if (grep(/^\Q$home\E$/,@{$ids})) {
                 if (ref($homecourses) eq 'HASH') {                  if (ref($homecourses) eq 'HASH') {
                     if (ref($homecourses->{$hashid}) eq 'ARRAY') {                      if (ref($homecourses->{$cdom}) eq 'HASH') {
                         push(@{$homecourses->{$hashid}},{$key=>$value});                          if (ref($homecourses->{$cdom}{$cnum}) eq 'HASH') {
                               if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
                                   push(@{$homecourses->{$cdom}{$cnum}},{$key=>$value});
                               } else {
                                   $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
                               }
                           } else {
                               $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
                           }
                     } else {                      } else {
                         $homecourses->{$hashid} = [{$key=>$value}];                          $homecourses->{$cdom}{$cnum} = [{$key=>$value}];
                     }                      }
                 }                  }
                 return;                  return;
Line 7480  sub releasereqd_check { Line 7547  sub releasereqd_check {
     return 1;      return 1;
 }  }
   
   # 
   # get_courseinfo_hash() is used to retrieve course information from the db
   # file: nohist_courseids.db for a course for which the current server is *not*
   # the home server.
   #
   # A hash of a hash will be retrieved. The outer hash contains a single key --
   # courseID -- for the course for which the data are being requested.
   # The contents of the inner hash, for that single item in the outer hash
   # are returned (and cached in memcache for 10 minutes).
   # 
   
 sub get_courseinfo_hash {  sub get_courseinfo_hash {
     my ($cnum,$cdom,$home) = @_;      my ($cnum,$cdom,$home) = @_;
     my %info;      my %info;
Line 7505  sub get_courseinfo_hash { Line 7583  sub get_courseinfo_hash {
     return;      return;
 }  }
   
   #
   # check_homecourses() will retrieve course information for those courses which
   # are keys of the $homecourses hash ref (first arg). The nohist_courseids.db 
   # GDBM file is tied and course information for each course retrieved. Last   
   # visit (lasttime key) is also retrieved for each, and cached values updated  
   # for any courses last visited less than 24 hours ago. Cached values are also
   # updated for any courses included in the $homecourses hash ref.
   #
   # The reason for the 24 hours constraint is that the cron entry in 
   # /etc/cron.d/loncapa for /home/httpd/perl/refresh_courseids_db.pl causes 
   # cached course information to be updated nightly for courses with activity
   # within the past 24 hours.
   #
   # Role information for the user (included in a ref to an array of hashes as the
   # value for each key in $homecourses) is appended to the result returned by the
   # routine, which will in turn be appended to the string returned to the client
   # hosting the user's session.
   # 
   
 sub check_homecourses {  sub check_homecourses {
     my ($homecourses,$udom,$regexp,$count,$range,$start,$end,$major,$minor) = @_;      my ($homecourses,$regexp,$count,$range,$start,$end,$major,$minor) = @_;
     my ($result,%addtocache);      my ($result,%addtocache);
     my $yesterday = time - 24*3600;       my $yesterday = time - 24*3600; 
     if (ref($homecourses) eq 'HASH') {      if (ref($homecourses) eq 'HASH') {
         my (%okcourses,%courseinfo,%recent);          my (%okcourses,%courseinfo,%recent);
         my $hashref = &tie_domain_hash($udom, "nohist_courseids", &GDBM_WRCREAT());          foreach my $domain (keys(%{$homecourses})) {
         if ($hashref) {              my $hashref = 
             while (my ($key,$value) = each(%$hashref)) {                  &tie_domain_hash($domain, "nohist_courseids", &GDBM_WRCREAT());
                 my $unesc_key = &unescape($key);              if (ref($hashref) eq 'HASH') {
                 if ($unesc_key =~ /^lasttime:(\w+)$/) {                  while (my ($key,$value) = each(%$hashref)) {
                     my $cid = $1;                      my $unesc_key = &unescape($key);
                     $cid =~ s/_/:/;                      if ($unesc_key =~ /^lasttime:(\w+)$/) {
                     if ($value > $yesterday ) {                          my $cid = $1;
                         $recent{$cid} = 1;                          $cid =~ s/_/:/;
                           if ($value > $yesterday ) {
                               $recent{$cid} = 1;
                           }
                           next;
                     }                      }
                     next;                      my $items = &Apache::lonnet::thaw_unescape($value);
                 }                      if (ref($items) eq 'HASH') {
                 my $items = &Apache::lonnet::thaw_unescape($value);                          my ($cdom,$cnum) = split(/_/,$unesc_key);
                 if (ref($items) eq 'HASH') {                          my $hashid = $cdom.':'.$cnum; 
                     my $hashid = $unesc_key;                          $courseinfo{$hashid} = $items;
                     $hashid =~ s/_/:/;                          if (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY') {
                     $courseinfo{$hashid} = $items;                              my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});
                     if (ref($homecourses->{$hashid}) eq 'ARRAY') {                              if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {
                         my ($reqdmajor,$reqdminor) = split(/\./,$items->{'releaserequired'});                                 $okcourses{$hashid} = 1;
                         if (&useable_role($reqdmajor,$reqdminor,$major,$minor)) {                              }
                             $okcourses{$hashid} = 1;  
                         }                          }
                     }                      }
                 }                  }
                   unless (&untie_domain_hash($hashref)) {
                       &logthis("Failed to untie tied hash for nohist_courseids.db for $domain");
                   }
               } else {
                   &logthis("Failed to tie hash for nohist_courseids.db for $domain");
             }              }
             unless (&untie_domain_hash($hashref)) {  
                 &logthis('Failed to untie tied hash for nohist_courseids.db');  
             }  
         } else {  
             &logthis('Failed to tie hash for nohist_courseids.db');  
             return;  
         }          }
         foreach my $hashid (keys(%recent)) {          foreach my $hashid (keys(%recent)) {
             my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);              my ($result,$cached)=&Apache::lonnet::is_cached_new('courseinfo',$hashid);
Line 7549  sub check_homecourses { Line 7648  sub check_homecourses {
                 &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);                  &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
             }              }
         }          }
         foreach my $hashid (keys(%{$homecourses})) {          foreach my $cdom (keys(%{$homecourses})) {
             next if ($recent{$hashid});              if (ref($homecourses->{$cdom}) eq 'HASH') {
             &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);                  foreach my $cnum (keys(%{$homecourses->{$cdom}})) {
                       my $hashid = $cdom.':'.$cnum;
                       next if ($recent{$hashid});
                       &Apache::lonnet::do_cache_new('courseinfo',$hashid,$courseinfo{$hashid},600);
                   }
               }
         }          }
         foreach my $hashid (keys(%okcourses)) {          foreach my $hashid (keys(%okcourses)) {
             if (ref($homecourses->{$hashid}) eq 'ARRAY') {              my ($cdom,$cnum) = split(/:/,$hashid);
                 foreach my $role (@{$homecourses->{$hashid}}) {              if ((ref($homecourses->{$cdom}) eq 'HASH') &&  
                   (ref($homecourses->{$cdom}{$cnum}) eq 'ARRAY')) {
                   foreach my $role (@{$homecourses->{$cdom}{$cnum}}) {
                     if (ref($role) eq 'HASH') {                      if (ref($role) eq 'HASH') {
                         while (my ($key,$value) = each(%{$role})) {                          while (my ($key,$value) = each(%{$role})) {
                             if ($regexp eq '.') {                              if ($regexp eq '.') {
Line 7581  sub check_homecourses { Line 7687  sub check_homecourses {
     return $result;      return $result;
 }  }
   
   #
   # useable_role() will compare the LON-CAPA version required by a course with 
   # the version available on the client server.  If the client server's version
   # is compatible, 1 will be returned.
   #
   
 sub useable_role {  sub useable_role {
     my ($reqdmajor,$reqdminor,$major,$minor) = @_;       my ($reqdmajor,$reqdminor,$major,$minor) = @_; 
     if ($reqdmajor ne '' && $reqdminor ne '') {      if ($reqdmajor ne '' && $reqdminor ne '') {
Removed from v.1.486  
changed lines
  Added in v.1.489

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