--- loncom/lti/ltiauth.pm 2021/08/07 01:34:20 1.21
+++ loncom/lti/ltiauth.pm 2022/03/29 19:37:25 1.35
@@ -1,7 +1,7 @@
# The LearningOnline Network
# Basic LTI Authentication Module
#
-# $Id: ltiauth.pm,v 1.21 2021/08/07 01:34:20 raeburn Exp $
+# $Id: ltiauth.pm,v 1.35 2022/03/29 19:37:25 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -30,8 +30,8 @@ package Apache::ltiauth;
use strict;
use LONCAPA qw(:DEFAULT :match);
+use Encode;
use Apache::Constants qw(:common :http);
-use Net::OAuth;
use Apache::lonlocal;
use Apache::lonnet;
use Apache::loncommon;
@@ -64,11 +64,11 @@ sub handler {
my $params = {};
foreach my $key (sort(keys(%env))) {
if ($key =~ /^form\.(.+)$/) {
- $params->{$1} = $env{$key};
+ $params->{$1} = &Encode::decode('UTF-8',$env{$key});
}
}
#
-# Check for existing session, and restored temporarily
+# Check for existing session, and restore temporarily
# deleted form items to %env, if session exists.
#
if ($handle ne '') {
@@ -80,7 +80,7 @@ sub handler {
}
unless (keys(%{$params})) {
- &invalid_request($r,1);
+ &invalid_request($r,'No parameters included in launch request');
return OK;
}
@@ -90,7 +90,7 @@ sub handler {
$params->{'oauth_version'} &&
$params->{'oauth_signature'} &&
$params->{'oauth_signature_method'}) {
- &invalid_request($r,2);
+ &invalid_request($r,'One or more required parameters missing from launch request');
return OK;
}
@@ -127,20 +127,6 @@ sub handler {
my $intdom = &Apache::lonnet::internet_dom($primary_id);
if (($intdom ne '') && (grep(/^\Q$intdom\E$/,@intdoms))) {
#
-# Retrieve information for LTI link protectors in course
-# where url was /adm/launch/tiny/$cdom/$uniqueid
-#
- my (%crslti,%crslti_by_key,$itemid,$ltitype);
- %crslti = &Apache::lonnet::get_course_lti($cnum,$cdom,'provider');
- if (keys(%crslti)) {
- foreach my $id (keys(%crslti)) {
- if (ref($crslti{$id}) eq 'HASH') {
- my $key = $crslti{$id}{'key'};
- push(@{$crslti_by_key{$key}},$id);
- }
- }
- }
-#
# Verify the signed request using the secret for LTI link
# protectors for which the key in the POSTed data matches
# keys in the course configuration.
@@ -153,71 +139,129 @@ sub handler {
# Determine if nonce in POSTed data has expired.
# If unexpired, confirm it has not already been used.
#
- if (keys(%crslti)) {
- $itemid = &get_lti_itemid($requri,$hostname,$params,\%crslti,\%crslti_by_key);
+# Retrieve information for LTI link protectors in course
+# where url was /adm/launch/tiny/$cdom/$uniqueid
+#
+
+ my ($itemid,$ltitype,%crslti,%lti_in_use);
+ $itemid = &get_lti_itemid($requri,$hostname,$params,$cdom,$cnum,'linkprot');
+ if ($itemid) {
+ %crslti = &Apache::lonnet::get_course_lti($cnum,$cdom);
}
if (($itemid) && (ref($crslti{$itemid}) eq 'HASH')) {
$ltitype = 'c';
- unless (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
- $crslti{$itemid}{'lifetime'},$cdom,$r->dir_config('lonLTIDir'))) {
- &invalid_request($r,3);
+ if (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
+ $crslti{$itemid}{'lifetime'},$cdom,$r->dir_config('lonLTIDir'))) {
+ %lti_in_use = %{$crslti{$itemid}};
+ } else {
+ &invalid_request($r,'Time limit exceeded for launch request credentials');
return OK;
}
} else {
- my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
- unless (keys(%lti) > 0) {
- &invalid_request($r,4);
- return OK;
+ $itemid = &get_lti_itemid($requri,$hostname,$params,$cdom,'','linkprot');
+ my %lti;
+ if ($itemid) {
+ %lti = &Apache::lonnet::get_domain_lti($cdom,'linkprot');
}
- my (%domlti_by_key,%domlti);
- foreach my $id (keys(%lti)) {
- if (ref($lti{$id}) eq 'HASH') {
- my $key = $lti{$id}{'key'};
- if (!$lti{$itemid}{'requser'}) {
- push(@{$domlti_by_key{$key}},$id);
- $domlti{$id} = $lti{$id};
- }
- }
- }
- if (keys(%domlti)) {
- $itemid = &get_lti_itemid($requri,$hostname,$params,\%domlti,\%domlti_by_key);
- }
- if (($itemid) && (ref($domlti{$itemid}) eq 'HASH')) {
+ if (($itemid) && (ref($lti{$itemid}) eq 'HASH')) {
$ltitype = 'd';
- unless (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
- $domlti{$itemid}{'lifetime'},$cdom,
+ if (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
+ $lti{$itemid}{'lifetime'},$cdom,
$r->dir_config('lonLTIDir'))) {
- &invalid_request($r,5);
+ %lti_in_use = %{$lti{$itemid}};
+ } else {
+ &invalid_request($r,'Time limit exceeded for launch request credentials');
return OK;
}
}
}
+ if (($itemid) && ($lti_in_use{'requser'})) {
+ my %courseinfo = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
+ my $ltiauth;
+ if (exists($courseinfo{'internal.ltiauth'})) {
+ $ltiauth = $courseinfo{'internal.ltiauth'};
+ } else {
+ my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
+ $ltiauth = $domdefs{'crsltiauth'};
+ }
+ if ($ltiauth) {
+ my $possuname;
+ my $mapuser = $lti_in_use{'mapuser'};
+ if ($mapuser eq 'sourcedid') {
+ if ($params->{'lis_person_sourcedid'} =~ /^$match_username$/) {
+ $possuname = $params->{'lis_person_sourcedid'};
+ }
+ } elsif ($mapuser eq 'email') {
+ if ($params->{'lis_person_contact_email_primary'} =~ /^$match_username$/) {
+ $possuname = $params->{'lis_person_contact_email_primary'};
+ }
+ } elsif (exists($params->{$mapuser})) {
+ if ($params->{$mapuser} =~ /^$match_username$/) {
+ $possuname = $params->{$mapuser};
+ }
+ }
+ if ($possuname ne '') {
+ my $uhome = &Apache::lonnet::homeserver($possuname,$cdom);
+ unless ($uhome eq 'no_host') {
+ my $uname = $possuname;
+ my ($is_student,$is_nonstudent);
+ my %course_roles =
+ &Apache::lonnet::get_my_roles($uname,$cdom,,'userroles',['active'],
+ ['cc','co','in','ta','ep','ad','st','cr'],
+ [$cdom]);
+ foreach my $key (keys(%course_roles)) {
+ my ($trest,$tdomain,$trole,$sec) = split(/:/,$key);
+ if (($trest eq $cnum) && ($tdomain eq $cdom)) {
+ if ($trole eq 'st') {
+ $is_student = 1;
+ } else {
+ $is_nonstudent = 1;
+ last;
+ }
+ }
+ }
+ if (($is_student) && (!$is_nonstudent)) {
+ unless (&Apache::lonnet::is_advanced_user($uname,$cdom)) {
+ foreach my $key (%{$params}) {
+ delete($env{'form.'.$key});
+ }
+ &linkprot_session($r,$uname,$cnum,$cdom,$uhome,$itemid,$ltitype,$tail,$lonhost);
+ return OK;
+ }
+ }
+ }
+ }
+ if ($lti_in_use{'notstudent'} eq 'reject') {
+ &invalid_request($r,'Information for valid user missing from launch request');
+ }
+ }
+ }
if ($itemid) {
foreach my $key (%{$params}) {
delete($env{'form.'.$key});
}
my $ltoken = &Apache::lonnet::tmpput({'linkprot' => $itemid.$ltitype.':'.$tail},
- $lonhost);
+ $lonhost,'link');
if ($ltoken) {
$r->internal_redirect($tail.'?ltoken='.$ltoken);
$r->set_handlers('PerlHandler'=> undef);
} else {
- &invalid_request($r,6);
+ &invalid_request($r,'Failed to store information from launch request');
}
} else {
- &invalid_request($r,7);
+ &invalid_request($r,'Launch request could not be validated');
}
} else {
- &invalid_request($r,8);
+ &invalid_request($r,'Launch unavailable on this LON-CAPA server');
}
} else {
- &invalid_request($r,9);
+ &invalid_request($r,'Launch unavailable for this domain');
}
} else {
- &invalid_request($r,10);
+ &invalid_request($r,'Invalid launch URL');
}
} else {
- &invalid_request($r,11);
+ &invalid_request($r,'Invalid launch URL');
}
return OK;
}
@@ -318,7 +362,7 @@ sub handler {
if ($tail =~ m{^/uploaded/($match_domain)/($match_courseid)/(?:default|supplemental)(?:|_\d+)\.(?:sequence|page)(|___\d+___.+)$}) {
($urlcdom,$urlcnum,my $rest) = ($1,$2,$3);
if (($cdom ne '') && ($cdom ne $urlcdom)) {
- &invalid_request($r,12);
+ &invalid_request($r,'Incorrect domain in requested URL');
return OK;
}
if ($rest eq '') {
@@ -337,13 +381,13 @@ sub handler {
} elsif ($tail =~ m{^/($match_domain)/($match_courseid)$}) {
($urlcdom,$urlcnum) = ($1,$2);
if (($cdom ne '') && ($cdom ne $urlcdom)) {
- &invalid_request($r,13);
+ &invalid_request($r,'Incorrect domain in requested URL');
return OK;
}
} elsif ($tail =~ m{^/tiny/($match_domain)/(\w+)$}) {
($urlcdom,$urlcnum) = &course_from_tinyurl($tail);
if (($urlcdom eq '') || ($urlcnum eq '')) {
- &invalid_request($r,14);
+ &invalid_request($r,'Invalid URL shortcut');
return OK;
}
}
@@ -369,33 +413,19 @@ sub handler {
#
# Retrieve information for LTI Consumers in course's domain
-# and populate hash -- %lti_by_key -- for which keys
-# are those defined in domain configuration for LTI.
-#
-
- my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
- unless (keys(%lti) > 0) {
- &invalid_request($r,15);
- return OK;
- }
- my %lti_by_key;
- if (keys(%lti)) {
- foreach my $id (keys(%lti)) {
- if (ref($lti{$id}) eq 'HASH') {
- my $key = $lti{$id}{'key'};
- push(@{$lti_by_key{$key}},$id);
- }
- }
- }
-
+# defined in domain configuration for LTI.
#
# Verify the signed request using the secret for those
-# Consumers for which the key in the POSTed data matches
+# Consumers for which the key in the POSTed data matches
# keys in the course configuration or the domain configuration
# for LTI.
#
- my $itemid = &get_lti_itemid($requri,$hostname,$params,\%lti,\%lti_by_key);
+ my %lti;
+ my $itemid = &get_lti_itemid($requri,$hostname,$params,$cdom);
+ if ($itemid) {
+ %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
+ }
#
# Request is invalid if the signed request could not be verified
@@ -403,7 +433,7 @@ sub handler {
# configuration in LON-CAPA for that LTI Consumer.
#
unless (($itemid) && (ref($lti{$itemid}) eq 'HASH')) {
- &invalid_request($r,16);
+ &invalid_request($r,'Launch request could not be validated');
return OK;
}
@@ -413,7 +443,7 @@ sub handler {
#
unless (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
$lti{$itemid}{'lifetime'},$cdom,$r->dir_config('lonLTIDir'))) {
- &invalid_request($r,17);
+ &invalid_request($r,'Time limit exceeded for launch request credentials');
return OK;
}
@@ -434,10 +464,10 @@ sub handler {
$r->internal_redirect($tail.'?ltoken='.$ltoken);
$r->set_handlers('PerlHandler'=> undef);
} else {
- &invalid_request($r,18);
+ &invalid_request($r,'Failed to store information from launch request');
}
} else {
- &invalid_request($r,19);
+ &invalid_request($r,'Launch URL invalid for matched launch credentials');
}
return OK;
}
@@ -495,13 +525,14 @@ sub handler {
if ($sourcecrs ne '') {
%consumers = &Apache::lonnet::get_dom('lticonsumers',[$sourcecrs],$cdom);
if (exists($consumers{$sourcecrs})) {
- if ($consumers{$sourcecrs} =~ /^$match_courseid$/) {
- my $crshome = &Apache::lonnet::homeserver($consumers{$sourcecrs},$cdom);
+ if ($consumers{$sourcecrs} =~ /^\Q$itemid:\E($match_courseid)$/) {
+ my $storedcnum = $1;
+ my $crshome = &Apache::lonnet::homeserver($storedcnum,$cdom);
if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
- &invalid_request($r,20);
+ &invalid_request($r,'Invalid courseID included in launch data');
return OK;
} else {
- $posscnum = $consumers{$sourcecrs};
+ $posscnum = $storedcnum;
}
}
}
@@ -510,7 +541,7 @@ sub handler {
if ($urlcnum ne '') {
if ($posscnum ne '') {
if ($posscnum ne $urlcnum) {
- &invalid_request($r,21);
+ &invalid_request($r,'Course ID included in launch data incompatible with URL');
return OK;
} else {
$cnum = $posscnum;
@@ -518,7 +549,7 @@ sub handler {
} else {
my $crshome = &Apache::lonnet::homeserver($urlcnum,$cdom);
if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
- &invalid_request($r,22);
+ &invalid_request($r,'Valid course ID could not be extracted from requested URL');
return OK;
} else {
$cnum = $urlcnum;
@@ -583,7 +614,7 @@ sub handler {
$domdesc,\%data,\%alerts,\%rulematch,
\%inst_results,\%curr_rules,%got_rules);
if ($result eq 'notallowed') {
- &invalid_request($r,23);
+ &invalid_request($r,'Account creation not permitted for this user');
} elsif ($result eq 'ok') {
if (($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'mapcrs'}) &&
($lti{$itemid}{'makecrs'})) {
@@ -592,16 +623,16 @@ sub handler {
}
}
} else {
- &invalid_request($r,24);
+ &invalid_request($r,'An error occurred during account creation');
return OK;
}
} else {
- &invalid_request($r,25);
+ &invalid_request($r,'Account creation not permitted');
return OK;
}
}
} else {
- &invalid_request($r,26);
+ &invalid_request($r,'Could not determine username and/or domain for user');
return OK;
}
@@ -613,20 +644,26 @@ sub handler {
my $reqcrs;
if ($cnum eq '') {
- if ((@ltiroles) && ($lti{$itemid}{'mapcrs'}) &&
- ($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'makecrs'})) {
- my (%can_request,%request_domains);
- &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
- if ($can_request{'lti'}) {
- $reqcrs = 1;
- <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,undef,$mapurl,$tail,
- $symb,$cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,
- $reqcrs,$sourcecrs);
+ if ($lti{$itemid}{'crsinc'}) {
+ if ((@ltiroles) && ($lti{$itemid}{'mapcrs'}) &&
+ ($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'makecrs'})) {
+ my (%can_request,%request_domains);
+ &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
+ if ($can_request{'lti'}) {
+ $reqcrs = 1;
+ <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,undef,$mapurl,$tail,
+ $symb,$cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,
+ $reqcrs,$sourcecrs);
+ } else {
+ &invalid_request($r,'No LON-CAPA course available, and creation is not permitted for this user');
+ }
} else {
- &invalid_request($r,27);
+ &invalid_request($r,'No LON-CAPA course available, and creation is not permitted');
}
} else {
- &invalid_request($r,28);
+ <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,undef,$mapurl,$tail,
+ $symb,$cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,
+ $reqcrs,$sourcecrs);
}
return OK;
}
@@ -634,7 +671,7 @@ sub handler {
#
# If LON-CAPA course is a Community, and LON-CAPA role
# indicated is cc, change role indicated to co.
-#
+#
my %crsenv;
if ($lcroles[0] eq 'cc') {
@@ -712,7 +749,7 @@ sub handler {
}
}
if ($reqrole eq '') {
- &invalid_request($r,29);
+ &invalid_request($r,'No matching role available in LON-CAPA course, and not permitted to self-enroll');
return OK;
} else {
unless (%crsenv) {
@@ -722,10 +759,10 @@ sub handler {
my $default_enrollment_end_date = $crsenv{'default_enrollment_end_date'};
my $now = time;
if ($default_enrollment_end_date && $default_enrollment_end_date <= $now) {
- &invalid_request($r,30);
+ &invalid_request($r,'No active role available in LON-CAPA course, and past end date for self-enrollment');
return OK;
} elsif ($default_enrollment_start_date && $default_enrollment_start_date >$now) {
- &invalid_request($r,31);
+ &invalid_request($r,'No active role available in LON-CAPA course, and brefor start date for self-enrollment');
return OK;
} else {
$selfenrollrole = $reqrole.'./'.$cdom.'/'.$cnum;
@@ -739,11 +776,41 @@ sub handler {
}
#
-# Store consumer-to-LON-CAPA course mapping
+# Retrieve course type of LON-CAPA course to check if mapping from a Consumer
+# course identifier permitted for this type of course (one of: official,
+# unofficial, community, textbook, placement or lti.
+#
+
+ unless (%crsenv) {
+ %crsenv = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
+ }
+ my $crstype = lc($crsenv{'type'});
+ if ($crstype eq '') {
+ $crstype = 'course';
+ }
+ if ($crstype eq 'course') {
+ if ($crsenv{'internal.coursecode'}) {
+ $crstype = 'official';
+ } elsif ($crsenv{'internal.textbook'}) {
+ $crstype = 'textbook';
+ } elsif ($crsenv{'internal.lti'}) {
+ $crstype = 'lti';
+ } else {
+ $crstype = 'unofficial';
+ }
+ }
+
+#
+# Store consumer-to-LON-CAPA course mapping if permitted
#
- if (($sourcecrs ne '') && ($consumers{$sourcecrs} eq '') && ($cnum ne '')) {
- &Apache::lonnet::put_dom('lticonsumers',{ $sourcecrs => $cnum },$cdom);
+ if (($lti{$itemid}{'storecrs'}) && ($sourcecrs ne '') &&
+ ($consumers{$sourcecrs} eq '') && ($cnum ne '')) {
+ if (ref($lti{$itemid}{'mapcrstype'}) eq 'ARRAY') {
+ if (grep(/^$crstype$/,@{$lti{$itemid}{'mapcrstype'}})) {
+ &Apache::lonnet::put_dom('lticonsumers',{ $sourcecrs => $itemid.':'.$cnum },$cdom);
+ }
+ }
}
#
@@ -757,38 +824,19 @@ sub handler {
}
sub get_lti_itemid {
- my ($requri,$hostname,$params,$lti,$lti_by_key) = @_;
- return unless ((ref($params) eq 'HASH') && (ref($lti) eq 'HASH') && (ref($lti_by_key) eq 'HASH'));
-
- if (exists($params->{'oauth_callback'})) {
- $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0A;
- } else {
- $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0;
- }
-
+ my ($requri,$hostname,$params,$cdom,$cnum,$context) = @_;
+ return unless (ref($params) eq 'HASH');
my $protocol = 'http';
if ($ENV{'SERVER_PORT'} == 443) {
$protocol = 'https';
}
-
- my ($itemid,$consumer_key,$secret);
- my $consumer_key = $params->{'oauth_consumer_key'};
- if (ref($lti_by_key->{$consumer_key}) eq 'ARRAY') {
- foreach my $id (@{$lti_by_key->{$consumer_key}}) {
- if (ref($lti->{$id}) eq 'HASH') {
- $secret = $lti->{$id}{'secret'};
- my $request = Net::OAuth->request('request token')->from_hash($params,
- request_url => $protocol.'://'.$hostname.$requri,
- request_method => $env{'request.method'},
- consumer_secret => $secret,);
- if ($request->verify()) {
- $itemid = $id;
- last;
- }
- }
- }
+ my $url = $protocol.'://'.$hostname.$requri;
+ my $method = $env{'request.method'};
+ if ($cnum ne '') {
+ return &Apache::lonnet::courselti_itemid($cnum,$cdom,$url,$method,$params,$context);
+ } else {
+ return &Apache::lonnet::domainlti_itemid($cdom,$url,$method,$params,$context);
}
- return $itemid;
}
sub lti_enroll {
@@ -846,24 +894,7 @@ sub lti_session {
} else {
&Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, course dom: $cdom");
}
- my ($is_balancer,$otherserver,$hosthere);
- ($is_balancer,$otherserver) =
- &Apache::lonnet::check_loadbalancing($uname,$udom,'login');
- if ($is_balancer) {
- if ($otherserver eq '') {
- my $lowest_load;
- ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($udom);
- if ($lowest_load > 100) {
- $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$udom);
- }
- }
- if ($otherserver ne '') {
- my @hosts = &Apache::lonnet::current_machine_ids();
- if (grep(/^\Q$otherserver\E$/,@hosts)) {
- $hosthere = $otherserver;
- }
- }
- }
+ my ($is_balancer,$otherserver,$hosthere) = &check_balancer($r,$uname,$udom);
my $protocol = 'http';
if ($ENV{'SERVER_PORT'} == 443) {
$protocol = 'https';
@@ -894,7 +925,9 @@ sub lti_session {
$env{'request.lti.uri'} = $tail;
} else {
unless ($tail eq '/adm/roles') {
- $env{'form.origurl'} = '/adm/navmaps';
+ if ($cnum) {
+ $env{'form.origurl'} = '/adm/navmaps';
+ }
}
}
}
@@ -930,7 +963,7 @@ sub lti_session {
if ($params->{'launch_presentation_document_target'}) {
$env{'request.lti.target'} = $params->{'launch_presentation_document_target'};
}
- foreach my $key (%{$params}) {
+ foreach my $key (keys(%{$params})) {
delete($env{'form.'.$key});
}
my $redirecturl = '/adm/switchserver';
@@ -940,9 +973,8 @@ sub lti_session {
$r->internal_redirect($redirecturl);
$r->set_handlers('PerlHandler'=> undef);
} else {
- # need to login them in, so generate the need data that
- # migrate expects to do login
- foreach my $key (%{$params}) {
+ # need to login them in, so generate the data migrate expects to do login
+ foreach my $key (keys(%{$params})) {
delete($env{'form.'.$key});
}
if (($ltihash->{'callback'}) && ($params->{$ltihash->{'callback'}})) {
@@ -1002,7 +1034,9 @@ sub lti_session {
$info{'origurl'} = $tail;
} else {
unless ($tail eq '/adm/roles') {
- $info{'origurl'} = '/adm/navmaps';
+ if ($cnum) {
+ $info{'origurl'} = '/adm/navmaps';
+ }
}
}
}
@@ -1017,8 +1051,72 @@ sub lti_session {
return;
}
+sub linkprot_session {
+ my ($r,$uname,$cnum,$cdom,$uhome,$itemid,$ltitype,$dest,$lonhost) = @_;
+ $r->user($uname);
+ if ($ltitype eq 'c') {
+ &Apache::lonnet::logthis("Course Link Protector ($itemid) authorized student: $uname:$cdom, course: $cdom\_$cnum");
+ } elsif ($ltitype eq 'd') {
+ &Apache::lonnet::logthis("Domain LTI for link protection ($itemid) authorized student: $uname:$cdom, course: $cdom\_$cnum");
+ }
+ my ($is_balancer,$otherserver,$hosthere) = &check_balancer($r,$uname,$cdom);
+ if (($is_balancer) && (!$hosthere)) {
+ # login but immediately go to switch server
+ &Apache::lonauth::success($r,$uname,$cdom,$uhome,'noredirect');
+ $env{'form.origurl'} = $dest;
+ $env{'request.linkprot'} = $itemid.$ltitype.':'.$dest;
+ $env{'request.deeplink.login'} = $dest;
+ my $redirecturl = '/adm/switchserver';
+ if ($otherserver ne '') {
+ $redirecturl .= '?otherserver='.$otherserver;
+ }
+ $r->internal_redirect($redirecturl);
+ $r->set_handlers('PerlHandler'=> undef);
+ } else {
+ # need to login them in, so generate the data migrate expects to do login
+ my $ip = $r->get_remote_host();
+ my %info=('ip' => $ip,
+ 'domain' => $cdom,
+ 'username' => $uname,
+ 'server' => $lonhost,
+ 'linkprot' => $itemid.$ltitype.':'.$dest,
+ 'home' => $uhome,
+ 'origurl' => $dest,
+ 'deeplink.login' => $dest,
+ );
+ my $token = &Apache::lonnet::tmpput(\%info,$lonhost);
+ $env{'form.token'} = $token;
+ $r->internal_redirect('/adm/migrateuser');
+ $r->set_handlers('PerlHandler'=> undef);
+ }
+ return;
+}
+
+sub check_balancer {
+ my ($r,$uname,$udom) = @_;
+ my ($is_balancer,$otherserver,$hosthere);
+ ($is_balancer,$otherserver) =
+ &Apache::lonnet::check_loadbalancing($uname,$udom,'login');
+ if ($is_balancer) {
+ if ($otherserver eq '') {
+ my $lowest_load;
+ ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($udom);
+ if ($lowest_load > 100) {
+ $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$udom);
+ }
+ }
+ if ($otherserver ne '') {
+ my @hosts = &Apache::lonnet::current_machine_ids();
+ if (grep(/^\Q$otherserver\E$/,@hosts)) {
+ $hosthere = $otherserver;
+ }
+ }
+ }
+ return ($is_balancer,$otherserver,$hosthere);
+}
+
sub invalid_request {
- my ($r,$num) = @_;
+ my ($r,$msg) = @_;
&Apache::loncommon::content_type($r,'text/html');
$r->send_http_header;
if ($r->header_only) {
@@ -1027,7 +1125,12 @@ sub invalid_request {
&Apache::lonlocal::get_language_handle($r);
$r->print(
&Apache::loncommon::start_page('Invalid LTI call','',{ 'only_body' => 1,}).
- &mt('Invalid LTI call [_1]',$num).
+ '<h3>'.&mt('Invalid LTI launch request').'</h3>'.
+ '<p class="LC_warning">'.
+ &mt('Launch of LON-CAPA is unavailable from the "external tool" link you had followed in another web application.').
+ &mt('Launch failed for the following reason:').
+ '</p>'.
+ '<p class="LC_error">'.$msg.'</p>'.
&Apache::loncommon::end_page());
return;
}