version 1.63, 2003/07/05 10:07:11
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version 1.67, 2003/09/11 20:03:28
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Line 171 ENDENTERKEY
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Line 171 ENDENTERKEY
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&Apache::lonuserstate::readmap($cdom.'/'.$cnum); |
&Apache::lonuserstate::readmap($cdom.'/'.$cnum); |
if (($ENV{'form.orgurl'}) && |
if (($ENV{'form.orgurl'}) && |
($ENV{'form.orgurl'}!~/^\/adm\/flip/)) { |
($ENV{'form.orgurl'}!~/^\/adm\/flip/)) { |
$r->internal_redirect($ENV{'form.orgurl'}); |
my $dest=$ENV{'form.orgurl'}; |
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if ( Apache::exists_config_define("MODPERL2") ) { |
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&Apache::lonnet::cleanenv(); |
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} |
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$r->internal_redirect($dest); |
return OK; |
return OK; |
} else { |
} else { |
unless ($ENV{'request.course.id'}) { |
unless ($ENV{'request.course.id'}) { |
Line 179 ENDENTERKEY
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Line 183 ENDENTERKEY
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"request.course.id" => $cdom.'_'.$cnum); |
"request.course.id" => $cdom.'_'.$cnum); |
$furl='/adm/roles?tryagain=1'; |
$furl='/adm/roles?tryagain=1'; |
$msg= |
$msg= |
'<h1><font color=red>Could not initialize course at this time.</font></h1><h3>Please try again.</h3>'; |
'<h1><font color=red>Could not initialize course at this time.</font></h1><h3>Please try again.</h3>'.$ferr; |
} |
} |
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# Check to see if the user is a CC entering a course |
# Check to see if the user is a CC entering a course |
Line 570 ENDHEADER
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Line 574 ENDHEADER
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} |
} |
} |
} |
} |
} |
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$r->print(&Apache::lonnet::getannounce()); |
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if ($advanced) { |
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$r->print('<p><small><i>This is LON-CAPA '. |
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$r->dir_config('lonVersion').'</i></small></p>'); |
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} |
$r->print("</body></html>\n"); |
$r->print("</body></html>\n"); |
return OK; |
return OK; |
} |
} |
Line 594 Invoked by /etc/httpd/conf/srm.conf:
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Line 602 Invoked by /etc/httpd/conf/srm.conf:
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ErrorDocument 500 /adm/errorhandler |
ErrorDocument 500 /adm/errorhandler |
</Location> |
</Location> |
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=head1 OVERVIEW |
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=head2 Choosing Roles |
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C<lonroles> is a handler that allows a user to switch roles in |
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mid-session. LON-CAPA attempts to work with "No Role Specified", the |
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default role that a user has before selecting a role, as widely as |
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possible, but certain handlers for example need specification which |
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course they should act on, etc. Both in this scenario, and when the |
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handler determines via C<lonnet>'s C<&allowed> function that a certain |
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action is not allowed, C<lonroles> is used as error handler. This |
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allows the user to select another role which may have permission to do |
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what they were trying to do. C<lonroles> can also be accessed via the |
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B<CRS> button in the Remote Control. |
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=begin latex |
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\begin{figure} |
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\begin{center} |
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\includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen} |
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\caption{\label{Sample_Roles_Screen}Sample Roles Screen} |
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\end{center} |
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\end{figure} |
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=end latex |
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=head2 Role Initialization |
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The privileges for a user are established at login time and stored in the session environment. As a consequence, a new role does not become active till the next login. Handlers are able to query for privileges using C<lonnet>'s C<&allowed> function. When a user first logs in, their role is the "common" role, which means that they have the sum of all of their privileges. During a session it might become necessary to choose a particular role, which as a consequence also limits the user to only the privileges in that particular role. |
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=head1 INTRODUCTION |
=head1 INTRODUCTION |
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This module enables a user to select what role he wishes to |
This module enables a user to select what role he wishes to |