--- loncom/auth/lonacc.pm	2014/01/04 23:21:22	1.151
+++ loncom/auth/lonacc.pm	2018/09/05 23:06:53	1.159.2.6
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Cookie Based Access Handler
 #
-# $Id: lonacc.pm,v 1.151 2014/01/04 23:21:22 raeburn Exp $
+# $Id: lonacc.pm,v 1.159.2.6 2018/09/05 23:06:53 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -109,7 +109,6 @@ sub cleanup {
     my ($r)=@_;
     if (! $r->is_initial_req()) { return DECLINED; }
     &Apache::lonnet::save_cache();
-    &Apache::lontexconvert::jsMath_reset();
     return OK;
 }
 
@@ -160,6 +159,8 @@ sub get_posted_cgi {
                         if (length($value) == 1) {
                             $value=~s/[\r\n]$//;
                         }
+                    } elsif ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
+                        $value=~s/[\r\n]$//;
                     }
                     if (ref($fields) eq 'ARRAY') {
                         next if (!grep(/^\Q$name\E$/,@{$fields}));
@@ -280,15 +281,17 @@ sub upload_size_allowed {
 sub sso_login {
     my ($r,$handle,$username) = @_;
 
-    my $lonidsdir=$r->dir_config('lonIDsDir');
-    if (($r->user eq '') || ($username ne '') ||
+    if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
         (defined($env{'user.name'}) && (defined($env{'user.domain'}))
 	  && ($handle ne ''))) {
 	# not an SSO case or already logged in
 	return undef;
     }
 
-    my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
+    my ($user) = ($r->user =~ m/^($match_username)$/);
+    if ($user eq '') {
+        return undef;
+    }
 
     my $query = $r->args;
     my %form;
@@ -305,7 +308,10 @@ sub sso_login {
     my %sessiondata;
     if ($form{'iptoken'}) {
         %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
-        my $delete = &Apache::lonnet::tmpdel($form{'token'});
+        my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
+        unless ($sessiondata{'sessionserver'}) {
+            delete($form{'iptoken'});
+        }
     }
 
     my $domain = $r->dir_config('lonSSOUserDomain');
@@ -317,17 +323,31 @@ sub sso_login {
 	&Apache::lonnet::logthis(" SSO authorized user $user ");
         my ($is_balancer,$otherserver,$hosthere);
         if ($form{'iptoken'}) {
-            if (($sessiondata{'domain'} eq $form{'udom'}) &&
-                ($sessiondata{'username'} eq $form{'uname'})) {
+            if (($sessiondata{'domain'} eq $domain) &&
+                ($sessiondata{'username'} eq $user)) {
                 $hosthere = 1;
             }
         }
         unless ($hosthere) {
             ($is_balancer,$otherserver) =
-                &Apache::lonnet::check_loadbalancing($user,$domain);
+                &Apache::lonnet::check_loadbalancing($user,$domain,'login');
+            if ($is_balancer) {
+                if ($otherserver eq '') {
+                    my $lowest_load;
+                    ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
+                    if ($lowest_load > 100) {
+                        $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$domain);
+                    }
+                }
+                if ($otherserver ne '') {
+                    my @hosts = &Apache::lonnet::current_machine_ids();
+                    if (grep(/^\Q$otherserver\E$/,@hosts)) {
+                        $hosthere = $otherserver;
+                    }
+                }
+            }
         }
-
-	if ($is_balancer) {
+	if (($is_balancer) && (!$hosthere)) {
 	    # login but immediately go to switch server to find us a new 
 	    # machine
 	    &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
@@ -345,27 +365,20 @@ sub sso_login {
 	} else {
 	    # need to login them in, so generate the need data that
 	    # migrate expects to do login
-	    my $ip;
-	    my $c = $r->connection;
-	    eval {
-	        $ip = $c->remote_ip();
-	    };
-	    if ($@) {
-	        $ip = $c->client_ip();
-	    }
+            my $ip = $r->get_remote_host();
 	    my %info=('ip'        => $ip,
 		      'domain'    => $domain,
 		      'username'  => $user,
 		      'server'    => $r->dir_config('lonHostID'),
 		      'sso.login' => 1
 		      );
-            foreach my $item ('role','symb') {
+            foreach my $item ('role','symb','iptoken') {
                 if (exists($form{$item})) {
                     $info{$item} = $form{$item};
                 }
             }
             unless ($info{'symb'}) {
-                unless ($r->uri eq '/adm/roles') {
+                unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
                     $info{'origurl'} = $r->uri; 
                 }
             }
@@ -376,6 +389,9 @@ sub sso_login {
                 $info{'sso.reloginserver'} = 
                     $r->dir_config('lonSSOReloginServer'); 
             }
+            if (($is_balancer) && ($hosthere)) {
+                $info{'noloadbalance'} = $hosthere;
+            }
 	    my $token = 
 		&Apache::lonnet::tmpput(\%info,
 					$r->dir_config('lonHostID'));
@@ -384,10 +400,8 @@ sub sso_login {
 	    $r->set_handlers('PerlHandler'=> undef);
 	}
 	return OK;
-    } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
+    } else {
 	&Apache::lonnet::logthis(" SSO authorized unknown user $user ");
-        $r->subprocess_env->set('SSOUserUnknown' => $user);
-        $r->subprocess_env->set('SSOUserDomain' => $domain);
         my @cancreate;
         my %domconfig =
             &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
@@ -401,13 +415,18 @@ sub sso_login {
                 }
             }
         }
-        if (grep(/^sso$/,@cancreate)) {
-            $r->internal_redirect('/adm/createaccount');
-        } else {
-	    $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
+        if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
+            $r->subprocess_env->set('SSOUserUnknown' => $user);
+            $r->subprocess_env->set('SSOUserDomain' => $domain);
+            if (grep(/^sso$/,@cancreate)) {
+                $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
+                $r->handler('perl-script');
+            } else {
+	        $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
+                $r->set_handlers('PerlHandler'=> undef);
+            }
+	    return OK;
         }
-	$r->set_handlers('PerlHandler'=> undef);
-	return OK;
     }
     return undef;
 }
@@ -437,7 +456,10 @@ sub handler {
     my ($is_balancer,$otherserver);
 
     if ($handle eq '') {
-        unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
+        unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
+                ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
+                ($requrl =~ m{^/adm/help/}) ||
+                ($requrl =~ m{^/res/$match_domain/$match_username/})) {
 	    $r->log_reason("Cookie not valid", $r->filename);
         }
     } elsif ($handle ne '') {
@@ -468,7 +490,7 @@ sub handler {
 	}
 	$env{'request.filename'} = $r->filename;
 	$env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
-        my $suppext;
+        my ($suppext,$checkabsolute);
         if ($requrl =~ m{^/adm/wrapper/ext/}) {
             my $query = $r->args;
             if ($query) {
@@ -489,6 +511,9 @@ sub handler {
                     $env{'request.external.querystring'} = $preserved;
                 }
             }
+            if ($env{'request.course.id'}) {
+                $checkabsolute = 1;
+            }
         } elsif ($env{'request.course.id'} &&
                  (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
                   ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}))) {
@@ -503,6 +528,20 @@ sub handler {
                     }
                 }
             }
+            if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
+                $checkabsolute = 1;
+            }
+        }
+        if ($checkabsolute) {
+            my $hostname = $r->hostname();
+            my $lonhost = &Apache::lonnet::host_from_dns($hostname);
+            if ($lonhost) {
+                my $actual = &Apache::lonnet::absolute_url($hostname);
+                my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
+                unless ($actual eq $expected) {
+                    $env{'request.use_absolute'} = $expected;
+                }
+            }
         }
 # -------------------------------------------------------- Load POST parameters
 
@@ -530,6 +569,10 @@ sub handler {
             if ($otherserver ne '') {
                 $env{'form.otherserver'} = $otherserver;
             }
+            unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
+                    ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
+                $env{'form.origurl'} = $r->uri;
+            }
         }
 
 # ---------------------------------------------------------------- Check access
@@ -537,6 +580,13 @@ sub handler {
 	if ($requrl !~ m{^/(?:adm|public|prtspool)/}
 	    || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
 	    my $access=&Apache::lonnet::allowed('bre',$requrl);
+            if ($handle eq '') {
+                unless ($access eq 'F') {
+                    if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
+                        $r->log_reason("Cookie not valid", $r->filename);
+                    }
+                }
+            }
 	    if ($access eq '1') {
 		$env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
 		return HTTP_NOT_ACCEPTABLE; 
@@ -564,6 +614,12 @@ sub handler {
                             return HTTP_NOT_ACCEPTABLE;
                         }
                     }
+                } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
+                    my $clientip = $r->get_remote_host();
+                    if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
+                        $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
+                        return HTTP_NOT_ACCEPTABLE;
+                    }
                 } else {
 		    $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
 		    return HTTP_NOT_ACCEPTABLE;
@@ -702,7 +758,8 @@ sub handler {
     }
 # ------------------------------------ See if this is a viewable portfolio file
     if (&Apache::lonnet::is_portfolio_url($requrl)) {
-	my $access=&Apache::lonnet::allowed('bre',$requrl);
+        my $clientip = $r->get_remote_host();
+	my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
 	if ($access eq 'A') {
 	    &Apache::restrictedaccess::setup_handler($r);
 	    return OK;