--- loncom/lonnet/perl/lonnet.pm	2012/12/13 19:32:52	1.1172.2.13
+++ loncom/lonnet/perl/lonnet.pm	2013/03/18 00:30:46	1.1172.2.21
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1172.2.13 2012/12/13 19:32:52 raeburn Exp $
+# $Id: lonnet.pm,v 1.1172.2.21 2013/03/18 00:30:46 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -75,7 +75,7 @@ use LWP::UserAgent();
 use HTTP::Date;
 use Image::Magick;
 
-use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir
+use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir $apache
             $_64bit %env %protocol %loncaparevs %serverhomeIDs %needsrelease
             %managerstab);
 
@@ -629,6 +629,15 @@ sub check_for_valid_session {
 	|| !defined($disk_env{'user.domain'})) {
 	return undef;
     }
+
+    if (($r->user() eq '') && ($apache >= 2.4)) {
+        if ($disk_env{'user.domain'} eq $r->dir_config('lonDefDomain')) {
+            $r->user($disk_env{'user.name'});
+        } else {
+            $r->user($disk_env{'user.name'}.':'.$disk_env{'user.domain'});
+        }
+    }
+
     return $handle;
 }
 
@@ -1995,8 +2004,9 @@ sub get_domain_defaults {
         }
     }
     if (ref($domconfig{'coursedefaults'}) eq 'HASH') {
-        foreach my $item ('canuse_pdfforms') {
-            $domdefaults{$item} = $domconfig{'coursedefaults'}{$item};
+        if (ref($domconfig{'coursedefaults'}{'coursecredits'}) eq 'HASH') {
+            $domdefaults{'officialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'official'};
+            $domdefaults{'unofficialcredits'} = $domconfig{'coursedefaults'}{'coursecredits'}{'unofficial'};
         }
     }
     if (ref($domconfig{'usersessions'}) eq 'HASH') {
@@ -2708,10 +2718,14 @@ sub can_edit_resource {
                 return;
             }
         } else {
+            if ($resurl =~ m{^/?adm/viewclasslist$}) {
+                unless (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+                    return;
+                }
+            } elsif (!$crsedit) {
 #
 # No edit allowed where CC has switched to student role.
 #
-            unless ($crsedit) {
                 return;
             }
         }
@@ -2758,6 +2772,14 @@ sub can_edit_resource {
                         $forceedit = 1;
                     }
                     $cfile = $resurl;
+                } elsif ($resurl =~ m{^/?adm/viewclasslist$}) {
+                    $incourse = 1;
+                    if ($env{'form.forceedit'}) {
+                        $forceview = 1;
+                    } else {
+                        $forceedit = 1;
+                    }
+                    $cfile = ($resurl =~ m{^/} ? $resurl : "/$resurl");
                 }
             } elsif ($resurl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
                 my $template = '/res/lib/templates/simpleproblem.problem';
@@ -2790,7 +2812,7 @@ sub can_edit_resource {
         }
         if ($uploaded || $incourse) {
             $home=&homeserver($cnum,$cdom);
-        } else {
+        } elsif ($file !~ m{/$}) {
             $file=~s{^(priv/$match_domain/$match_username)}{/$1};
             $file=~s{^($match_domain/$match_username)}{/priv/$1};
             # Check that the user has permission to edit this resource
@@ -3162,7 +3184,9 @@ sub userfileupload {
 					 $codebase,$thumbwidth,$thumbheight,
                                          $resizewidth,$resizeheight,$context,$mimetype);
         } else {
-            $fname=$env{'form.folder'}.'/'.$fname;
+            if ($env{'form.folder'}) {
+                $fname=$env{'form.folder'}.'/'.$fname;
+            }
             return &process_coursefile('uploaddoc',$docuname,$docudom,
 				       $fname,$formname,$parser,
 				       $allfiles,$codebase,$mimetype);
@@ -5029,9 +5053,11 @@ sub rolesinit {
 }
 
 sub set_arearole {
-    my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
+    my ($trole,$area,$tstart,$tend,$domain,$username,$nolog) = @_;
+    unless ($nolog) {
 # log the associated role with the area
-    &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
+        &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
+    }
     return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
 }
 
@@ -5300,7 +5326,7 @@ sub set_adhoc_privileges {
     my $area = '/'.$dcdom.'/'.$pickedcourse;
     my $spec = $role.'.'.$area;
     my %userroles = &set_arearole($role,$area,'','',$env{'user.domain'},
-                                  $env{'user.name'});
+                                  $env{'user.name'},1);
     my %ccrole = ();
     &standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
     my ($author,$adv)= &set_userprivs(\%userroles,\%ccrole);
@@ -6839,7 +6865,7 @@ sub constructaccess {
     if (($allowed eq 'F') || ($allowed eq 'U')) {
 # Grant temporary access
         my $then=$env{'user.login.time'};
-        my $update==$env{'user.update.time'};
+        my $update=$env{'user.update.time'};
         if (!$update) { $update = $then; }
         my $refresh=$env{'user.refresh.time'};
         if (!$refresh) { $refresh = $update; }
@@ -7378,8 +7404,8 @@ sub auto_validate_instcode {
     }
     $response=&unescape(&reply('autovalidateinstcode:'.$cdom.':'.
                         &escape($instcode).':'.&escape($owner),$homeserver));
-    my ($outcome,$description) = map { &unescape($_); } split('&',$response,2);
-    return ($outcome,$description);
+    my ($outcome,$description,$defaultcredits) = map { &unescape($_); } split('&',$response,3);
+    return ($outcome,$description,$defaultcredits);
 }
 
 sub auto_create_password {
@@ -8319,7 +8345,7 @@ sub modifyuser {
 sub modifystudent {
     my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
         $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid,
-        $selfenroll,$context,$inststatus)=@_;
+        $selfenroll,$context,$inststatus,$credits)=@_;
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
 	    return 'not_in_class';
@@ -8334,12 +8360,13 @@ sub modifystudent {
     # students environment
     $uid = undef if (!$forceid);
     $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
-					$gene,$usec,$end,$start,$type,$locktype,$cid,$selfenroll,$context);
+					$gene,$usec,$end,$start,$type,$locktype,
+                                        $cid,$selfenroll,$context,$credits);
     return $reply;
 }
 
 sub modify_student_enrollment {
-    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid,$selfenroll,$context) = @_;
+    my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid,$selfenroll,$context,$credits) = @_;
     my ($cdom,$cnum,$chome);
     if (!$cid) {
 	unless ($cid=$env{'request.course.id'}) {
@@ -8386,7 +8413,7 @@ sub modify_student_enrollment {
     my %old_entry = &Apache::lonnet::get('classlist',[$user],$cdom,$cnum);
     my $reply=cput('classlist',
 		   {$user => 
-			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
+			join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype,$credits) },
 		   $cdom,$cnum);
     if (($reply eq 'ok') || ($reply eq 'delayed')) {
         &devalidate_getsection_cache($udom,$uname,$cid);
@@ -9871,7 +9898,7 @@ sub metadata {
     # if it is a non metadata possible uri return quickly
     if (($uri eq '') || 
 	(($uri =~ m|^/*adm/|) && 
-	     ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
+	     ($uri !~ m|^adm/includes|) && ($uri !~ m{/(smppg|bulletinboard)$})) ||
         ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ m{^/*uploaded/.+\.sequence$})) {
 	return undef;
     }
@@ -11501,12 +11528,12 @@ sub goodbye {
 }
 
 sub get_dns {
-    my ($url,$func,$ignore_cache) = @_;
+    my ($url,$func,$ignore_cache,$nocache,$hashref) = @_;
     if (!$ignore_cache) {
 	my ($content,$cached)=
 	    &Apache::lonnet::is_cached_new('dns',$url);
 	if ($cached) {
-	    &$func($content);
+	    &$func($content,$hashref);
 	    return;
 	}
     }
@@ -11531,8 +11558,10 @@ sub get_dns {
         delete($alldns{$dns});
 	next if ($response->is_error());
 	my @content = split("\n",$response->content);
-	&Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
-	&$func(\@content);
+        unless ($nocache) {
+	    &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
+        }
+	&$func(\@content,$hashref);
 	return;
     }
     close($config);
@@ -11540,9 +11569,62 @@ sub get_dns {
     &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
     open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
     my @content = <$config>;
-    &$func(\@content);
+    &$func(\@content,$hashref);
+    return;
+}
+
+# ------------------------------------------------------Get DNS checksums file
+sub parse_dns_checksums_tab {
+    my ($lines,$hashref) = @_;
+    my $machine_dom = &Apache::lonnet::host_domain($perlvar{'lonHostID'});
+    my $loncaparev = &get_server_loncaparev($machine_dom);
+    my ($release,$timestamp) = split(/\-/,$loncaparev);
+    my (%chksum,%revnum);
+    if (ref($lines) eq 'ARRAY') {
+        chomp(@{$lines});
+        my $versions = shift(@{$lines});
+        my %supported;
+        if ($versions =~ /^VERSIONS\:([\w\.\,]+)$/) {
+            my $releaseslist = $1;
+            if ($releaseslist =~ /,/) {
+                map { $supported{$_} = 1; } split(/,/,$releaseslist);
+            } elsif ($releaseslist) {
+                $supported{$releaseslist} = 1;
+            }
+        }
+        if ($supported{$release}) {
+            my $matchthis = 0;
+            foreach my $line (@{$lines}) {
+                if ($line =~ /^(\d[\w\.]+)$/) {
+                    if ($matchthis) {
+                        last;
+                    } elsif ($1 eq $release) {
+                        $matchthis = 1;
+                    }
+                } elsif ($matchthis) {
+                    my ($file,$version,$shasum) = split(/,/,$line);
+                    $chksum{$file} = $shasum;
+                    $revnum{$file} = $version;
+                }
+            }
+            if (ref($hashref) eq 'HASH') {
+                %{$hashref} = (
+                                sums     => \%chksum,
+                                versions => \%revnum,
+                              );
+            }
+        }
+    }
     return;
 }
+
+sub fetch_dns_checksums {
+    my %checksums;
+    &get_dns('/adm/dns/checksums',\&parse_dns_checksums_tab,1,1,
+             \%checksums);
+    return \%checksums;
+}
+
 # ------------------------------------------------------------ Read domain file
 {
     my $loaded;
@@ -12080,6 +12162,17 @@ $readit=1;
 	if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
 	&logthis(" Detected 64bit platform ($_64bit)");
     }
+
+    {
+        eval {
+            ($apache) =
+                (Apache2::ServerUtil::get_server_version() =~ m{Apache/(\d+\.\d+)});
+        };
+        if ($@) {
+           $apache = 1.3;
+        }
+    }
+
 }
 }
 
@@ -12515,7 +12608,9 @@ Inputs:
 
 =item B<$context> role change context (shown in User Management Logs display in a course)
 
-=item B<$inststatus> institutional status of user - : separated string of escaped status types  
+=item B<$inststatus> institutional status of user - : separated string of escaped status types
+
+=item B<$credits> Number of credits student will earn from this class - only needs to be supplied if value needs to be different from default credits for class.
 
 =back
 
@@ -12560,6 +12655,8 @@ Inputs:
 
 =item $context
 
+=item $credits, number of credits student will earn from this class
+
 =back
 
 
@@ -12725,7 +12822,7 @@ returns the data handle
 
 =item *
 
-symbverify($symb,$thisfn,$ecstate) : verifies that $symb actually exists
+symbverify($symb,$thisfn,$encstate) : verifies that $symb actually exists
 and is a possible symb for the URL in $thisfn, and if is an encrypted
 resource that the user accessed using /enc/ returns a 1 on success, 0
 on failure, user must be in a course, as it assumes the existence of