File:
[LON-CAPA] /
loncom /
lti /
ltiauth.pm
Revision
1.17:
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Wed Dec 26 20:10:29 2018 UTC (5 years, 5 months ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
- Bug 6400 Deep-linking
- URLs like /adm/lti/tiny/domain/uniqueID can be used to restrict use of
deep links to access from another LTI-enabled application (no user data
passed in this context).
1: # The LearningOnline Network
2: # Basic LTI Authentication Module
3: #
4: # $Id: ltiauth.pm,v 1.17 2018/12/26 20:10:29 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28:
29: package Apache::ltiauth;
30:
31: use strict;
32: use LONCAPA qw(:DEFAULT :match);
33: use Apache::Constants qw(:common :http);
34: use Net::OAuth;
35: use Apache::lonlocal;
36: use Apache::lonnet;
37: use Apache::loncommon;
38: use Apache::lonacc;
39: use Apache::lonrequestcourse;
40: use LONCAPA::ltiutils;
41:
42: sub handler {
43: my $r = shift;
44: my $requri = $r->uri;
45: #
46: # Check for existing session, and temporarily delete any form items
47: # in %env, if session exists
48: #
49: my %savedform;
50: my $handle = &Apache::lonnet::check_for_valid_session($r);
51: if ($handle ne '') {
52: foreach my $key (sort(keys(%env))) {
53: if ($key =~ /^form\.(.+)$/) {
54: $savedform{$1} = $env{$key};
55: delete($env{$key});
56: }
57: }
58: }
59: #
60: # Retrieve data POSTed by LTI Consumer on launch
61: #
62: &Apache::lonacc::get_posted_cgi($r);
63: my $params = {};
64: foreach my $key (sort(keys(%env))) {
65: if ($key =~ /^form\.(.+)$/) {
66: $params->{$1} = $env{$key};
67: }
68: }
69: #
70: # Check for existing session, and restored temporarily
71: # deleted form items to %env, if session exists.
72: #
73: if ($handle ne '') {
74: if (keys(%savedform)) {
75: foreach my $key (sort(keys(%savedform))) {
76: $env{'form.'.$key} = $savedform{$key};
77: }
78: }
79: }
80:
81: unless (keys(%{$params})) {
82: &invalid_request($r,1);
83: return OK;
84: }
85:
86: unless ($params->{'oauth_consumer_key'} &&
87: $params->{'oauth_nonce'} &&
88: $params->{'oauth_timestamp'} &&
89: $params->{'oauth_version'} &&
90: $params->{'oauth_signature'} &&
91: $params->{'oauth_signature_method'}) {
92: &invalid_request($r,2);
93: return OK;
94: }
95:
96: #
97: # Retrieve "internet domains" for all this institution's LON-CAPA
98: # nodes.
99: #
100: my ($udom,$uname,$uhome,$cdom,$cnum,$symb,$mapurl,@intdoms);
101: my $lonhost = $r->dir_config('lonHostID');
102: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
103: if (ref($internet_names) eq 'ARRAY') {
104: @intdoms = @{$internet_names};
105: }
106:
107: #
108: # For user who launched LTI in Consumer, determine user's domain in
109: # LON-CAPA.
110: #
111: # Order is:
112: #
113: # (a) from custom_userdomain item in POSTed data
114: # (b) from lis_person_sourcedid in POSTed data
115: # (c) from default "log-in" domain for node
116: # (can support multidomain servers, where specific domain is
117: # first part of hostname).
118: #
119: # Note: "internet domain" for user's domain must be one of the
120: # "internet domain(s)" for the institution's LON-CAPA servers.
121: #
122: if (exists($params->{'custom_userdomain'})) {
123: if ($params->{'custom_userdomain'} =~ /^$match_domain$/) {
124: my $uprimary_id = &Apache::lonnet::domain($params->{'custom_userdomain'},'primary');
125: if ($uprimary_id ne '') {
126: my $uintdom = &Apache::lonnet::internet_dom($uprimary_id);
127: if (($uintdom ne '') && (grep(/^\Q$uintdom\E$/,@intdoms))) {
128: $udom = $params->{'custom_userdomain'};
129: }
130: }
131: }
132: }
133: my $defdom = &Apache::lonnet::default_login_domain();
134: my ($domain,$possuname,$possudom,$possmapuser);
135: if ($env{'form.lis_person_sourcedid'} =~ /^($match_username)\:($match_domain)$/) {
136: ($possuname,$possudom) = ($1,$2);
137: if ($udom eq '') {
138: my $uintdom = &Apache::lonnet::domain($possudom,'primary');
139: if (($uintdom ne '') && (grep(/^\Q$uintdom\E$/,@intdoms))) {
140: $udom = $possudom;
141: $possmapuser = 'lis_person_sourcedid';
142: } else {
143: $udom = $defdom;
144: }
145: } elsif ($udom eq $possudom) {
146: $possmapuser = 'lis_person_sourcedid';
147: }
148: }
149: unless ($possuname) {
150: if ($env{'form.lis_person_sourcedid'} =~ /^$match_username$/) {
151: $possuname = $env{'form.lis_person_sourcedid'};
152: $possmapuser = 'lis_person_sourcedid';
153: } elsif ($env{'form.lis_person_contact_email_primary'} =~ /^$match_username$/) {
154: $possuname = $env{'form.lis_person_contact_email_primary'};
155: $possmapuser = 'lis_person_contact_email_primary';
156: }
157: unless ($udom) {
158: $udom = $defdom;
159: }
160: }
161:
162: #
163: # Determine course's domain in LON-CAPA
164: #
165: # Order is:
166: #
167: # (a) from custom_coursedomain item in POSTed data
168: # (b) from tail of requested URL (after /adm/lti/) if it has format of a symb
169: # (c) from tail of requested URL (after /adm/lti) if it has format of a map
170: # (d) from tail of requested URL (after /adm/lti) if it has format /domain/courseID
171: # (e) from tail of requested URL (after /adm/lti) if it has format /tiny/domain/\w+
172: # i.e., a shortened URL (see bug #6400).
173: # (f) same as user's domain
174: #
175: # Request invalid if custom_coursedomain is defined and is inconsistent with
176: # domain contained in requested URL.
177: #
178: # Note: "internet domain" for course's domain must be one of the
179: # internet domains for the institution's LON-CAPA servers.
180: #
181:
182: if (exists($params->{'custom_coursedomain'})) {
183: if ($params->{'custom_coursedomain'} =~ /^$match_domain$/) {
184: my $cprimary_id = &Apache::lonnet::domain($params->{'custom_coursedomain'},'primary');
185: if ($cprimary_id ne '') {
186: my $cintdom = &Apache::lonnet::internet_dom($cprimary_id);
187: if (($cintdom ne '') && (grep(/^\Q$cintdom\E$/,@intdoms))) {
188: $cdom = $params->{'custom_coursedomain'};
189: }
190: }
191: }
192: }
193:
194: my ($tail) = ($requri =~ m{^/adm/lti(|/.*)$});
195: my $urlcnum;
196: if ($tail ne '') {
197: my $urlcdom;
198: if ($tail =~ m{^/uploaded/($match_domain)/($match_courseid)/(?:default|supplemental)(?:|_\d+)\.(?:sequence|page)(|___\d+___.+)$}) {
199: ($urlcdom,$urlcnum,my $rest) = ($1,$2,$3);
200: if (($cdom ne '') && ($cdom ne $urlcdom)) {
201: &invalid_request($r,3);
202: return OK;
203: }
204: if ($rest eq '') {
205: $mapurl = $tail;
206: } else {
207: $symb = $tail;
208: $symb =~ s{^/}{};
209: }
210: } elsif ($tail =~ m{^/res/(?:$match_domain)/(?:$match_username)/.+\.(?:sequence|page)(|___\d+___.+)$}) {
211: if ($1 eq '') {
212: $mapurl = $tail;
213: } else {
214: $symb = $tail;
215: $symb =~ s{^/res/}{};
216: }
217: } elsif ($tail =~ m{^/($match_domain)/($match_courseid)$}) {
218: ($urlcdom,$urlcnum) = ($1,$2);
219: if (($cdom ne '') && ($cdom ne $urlcdom)) {
220: &invalid_request($r,4);
221: return OK;
222: }
223: } elsif ($tail =~ m{^/tiny/($match_domain)/(\w+)$}) {
224: ($urlcdom,my $key) = ($1,$2);
225: if (($cdom ne '') && ($cdom ne $urlcdom)) {
226: &invalid_request($r,5);
227: return OK;
228: }
229: my $tinyurl;
230: my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$urlcdom."\0".$key);
231: if (defined($cached)) {
232: $tinyurl = $result;
233: } else {
234: my $configuname = &Apache::lonnet::get_domainconfiguser($urlcdom);
235: my %currtiny = &Apache::lonnet::get('tiny',[$key],$urlcdom,$configuname);
236: if ($currtiny{$key} ne '') {
237: $tinyurl = $currtiny{$key};
238: &Apache::lonnet::do_cache_new('tiny',$urlcdom."\0".$key,$currtiny{$key},600);
239: }
240: }
241: if ($tinyurl ne '') {
242: $urlcnum = (split(/\&/,$tinyurl))[0];
243: }
244: }
245: if (($cdom eq '') && ($urlcdom ne '')) {
246: my $cprimary_id = &Apache::lonnet::domain($urlcdom,'primary');
247: if ($cprimary_id ne '') {
248: my $cintdom = &Apache::lonnet::internet_dom($cprimary_id);
249: if (($cintdom ne '') && (grep(/^\Q$cintdom\E$/,@intdoms))) {
250: $cdom = $urlcdom;
251: }
252: } else {
253: $urlcnum = '';
254: }
255: }
256: }
257: if ($cdom eq '') {
258: if ($udom ne '') {
259: $cdom = $udom;
260: } else {
261: $cdom = $defdom;
262: }
263: }
264:
265: #
266: # Retrieve information for LTI Consumers in course domain
267: # and populate hash -- %lti_by_key -- for which keys
268: # are those defined in domain configuration for LTI.
269: #
270:
271: my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
272: unless (keys(%lti) > 0) {
273: &invalid_request($r,6);
274: return OK;
275: }
276: my %lti_by_key;
277: if (keys(%lti)) {
278: foreach my $id (keys(%lti)) {
279: if (ref($lti{$id}) eq 'HASH') {
280: my $key = $lti{$id}{'key'};
281: push(@{$lti_by_key{$key}},$id);
282: }
283: }
284: }
285:
286: #
287: # Verify the signed request using the secret for those
288: # Consumers for which the key in the POSTed data matches
289: # keys in the domain configuration for LTI.
290: #
291: my $hostname = $r->hostname;
292: my $protocol = 'http';
293: if ($ENV{'SERVER_PORT'} == 443) {
294: $protocol = 'https';
295: }
296:
297: if (exists($params->{'oauth_callback'})) {
298: $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0A;
299: } else {
300: $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0;
301: }
302:
303: my ($itemid,$consumer_key,$secret);
304: $consumer_key = $params->{'oauth_consumer_key'};
305: if (ref($lti_by_key{$consumer_key}) eq 'ARRAY') {
306: foreach my $id (@{$lti_by_key{$consumer_key}}) {
307: if (ref($lti{$id}) eq 'HASH') {
308: $secret = $lti{$id}{'secret'};
309: my $request = Net::OAuth->request('request token')->from_hash($params,
310: request_url => $protocol.'://'.$hostname.$requri,
311: request_method => $env{'request.method'},
312: consumer_secret => $secret,);
313: if ($request->verify()) {
314: $itemid = $id;
315: last;
316: }
317: }
318: }
319: }
320:
321: #
322: # Request is invalid if the signed request could not be verified
323: # for the Consumer key and Consumer secret from the domain
324: # configuration in LON-CAPA for that LTI Consumer.
325: #
326: unless (($itemid) && (ref($lti{$itemid}) eq 'HASH')) {
327: &invalid_request($r,7);
328: return OK;
329: }
330:
331: #
332: # Determine if nonce in POSTed data has expired.
333: # If unexpired, confirm it has not already been used.
334: #
335: unless (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
336: $lti{$itemid}{'lifetime'},$cdom,$r->dir_config('lonLTIDir'))) {
337: &invalid_request($r,8);
338: return OK;
339: }
340:
341: #
342: # Determine if a username is required from the domain
343: # configuration for the specific LTI Consumer
344: #
345:
346: if (!$lti{$itemid}{'requser'}) {
347: if ($tail =~ m{^/tiny/($match_domain)/(\w+)$}) {
348: foreach my $key (%{$params}) {
349: delete($env{'form.'.$key});
350: }
351: my $ltoken = &Apache::lonnet::tmpput({'linkprot' => $itemid.':'.$tail},
352: $lonhost);
353: if ($ltoken) {
354: $r->internal_redirect($tail.'?ltoken='.$ltoken);
355: $r->set_handlers('PerlHandler'=> undef);
356: } else {
357: &invalid_request($r,9);
358: }
359: } else {
360: &invalid_request($r,10);
361: }
362: return OK;
363: }
364:
365: #
366: # Determine if source of username matches requirement from the
367: # domain configuration for the specific LTI Consumer.
368: #
369:
370: if ($lti{$itemid}{'mapuser'} eq $possmapuser) {
371: $uname = $possuname;
372: } elsif ($lti{$itemid}{'mapuser'} eq 'lis_person_sourcedid') {
373: if ($params->{'lis_person_sourcedid'} =~ /^$match_username$/) {
374: $uname = $possuname;
375: }
376: } elsif ($lti{$itemid}{'mapuser'} eq 'lis_person_contact_email_primary') {
377: if ($params->{'lis_person_contact_email_primary'} =~ /^$match_username$/) {
378: $uname = $params->{'lis_person_contact_email_primary'};
379: }
380: } elsif (exists($params->{$lti{$itemid}{'mapuser'}})) {
381: if ($params->{$lti{$itemid}{'mapuser'}} =~ /^$match_username$/) {
382: $uname = $params->{$lti{$itemid}{'mapuser'}};
383: }
384: }
385:
386: #
387: # Determine the courseID of the LON-CAPA course to which the
388: # launch of LON-CAPA should provide access.
389: #
390: # Order is:
391: #
392: # (a) from course mapping (if the link between Consumer "course" and
393: # Provider "course" has been established previously).
394: # (b) from tail of requested URL (after /adm/lti/) if it has format of a symb
395: # (c) from tail of requested URL (after /adm/lti) if it has format of a map
396: # (d) from tail of requested URL (after /adm/lti) if it has format /domain/courseID
397: # (e) from tail of requested URL (after /adm/lti) if it has format /tiny/domain/\w+
398: # i.e., a shortened URL (see bug #6400).
399: #
400: # If Consumer course included in POSTed data points as a target course which
401: # has a format which matches a LON-CAPA courseID, but the course does not
402: # exist, the request is invalid.
403: #
404:
405: my ($sourcecrs,%consumers);
406: if ($lti{$itemid}{'mapcrs'} eq 'course_offering_sourcedid') {
407: $sourcecrs = $params->{'course_offering_sourcedid'};
408: } elsif ($lti{$itemid}{'mapcrs'} eq 'context_id') {
409: $sourcecrs = $params->{'context_id'};
410: } elsif ($lti{$itemid}{'mapcrs'} ne '') {
411: $sourcecrs = $params->{$lti{$itemid}{'mapcrs'}};
412: }
413:
414: my $posscnum;
415: if ($sourcecrs ne '') {
416: %consumers = &Apache::lonnet::get_dom('lticonsumers',[$sourcecrs],$cdom);
417: if (exists($consumers{$sourcecrs})) {
418: if ($consumers{$sourcecrs} =~ /^$match_courseid$/) {
419: my $crshome = &Apache::lonnet::homeserver($consumers{$sourcecrs},$cdom);
420: if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
421: &invalid_request($r,11);
422: return OK;
423: } else {
424: $posscnum = $consumers{$sourcecrs};
425: }
426: }
427: }
428: }
429:
430: if ($urlcnum ne '') {
431: if ($posscnum ne '') {
432: if ($posscnum ne $urlcnum) {
433: &invalid_request($r,12);
434: return OK;
435: } else {
436: $cnum = $posscnum;
437: }
438: } else {
439: my $crshome = &Apache::lonnet::homeserver($urlcnum,$cdom);
440: if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
441: &invalid_request($r,13);
442: return OK;
443: } else {
444: $cnum = $urlcnum;
445: }
446: }
447: } elsif ($posscnum ne '') {
448: $cnum = $posscnum;
449: }
450:
451: #
452: # Get LON-CAPA role(s) to use from role-mapping of Consumer roles
453: # defined in domain configuration for the appropriate LTI
454: # Consumer.
455: #
456: # If multiple LON-CAPA roles are indicated for the current user,
457: # ordering (from first to last) is: cc/co, in, ta, ep, st.
458: #
459:
460: my (@ltiroles,@lcroles);
461: my @lcroleorder = ('cc','in','ta','ep','st');
462: my ($lcrolesref,$ltirolesref) =
463: &LONCAPA::ltiutils::get_lc_roles($params->{'roles'},
464: \@lcroleorder,
465: $lti{$itemid}{maproles});
466: if (ref($lcrolesref) eq 'ARRAY') {
467: @lcroles = @{$lcrolesref};
468: }
469: if (ref($ltirolesref) eq 'ARRAY') {
470: @ltiroles = @{$ltirolesref};
471: }
472:
473: #
474: # If no LON-CAPA username -- is user allowed to create one?
475: #
476:
477: my $selfcreate;
478: if (($uname ne '') && ($udom ne '')) {
479: $uhome = &Apache::lonnet::homeserver($uname,$udom);
480: if ($uhome =~ /(con_lost|no_host|no_such_host)/) {
481: &Apache::lonnet::logthis(" LTI authorized unknown user $uname:$udom ");
482: if (ref($lti{$itemid}{'makeuser'}) eq 'ARRAY') {
483: if (@{$lti{$itemid}{'makeuser'}} > 0) {
484: foreach my $ltirole (@ltiroles) {
485: if (grep(/^\Q$ltirole\E$/,@{$lti{$itemid}{'makeuser'}})) {
486: $selfcreate = 1;
487: last;
488: }
489: }
490: }
491: }
492: if ($selfcreate) {
493: my (%rulematch,%inst_results,%curr_rules,%got_rules,%alerts);
494: my $domdesc = &Apache::lonnet::domain($udom,'description');
495: my %data = (
496: 'permanentemail' => $env{'form.lis_person_contact_email_primary'},
497: 'firstname' => $env{'form.lis_person_name_given'},
498: 'lastname' => $env{'form.lis_person_name_family'},
499: 'fullname' => $env{'form.lis_person_name_full'},
500: );
501: my $result =
502: &LONCAPA::ltiutils::create_user($lti{$itemid},$uname,$udom,
503: $domdesc,\%data,\%alerts,\%rulematch,
504: \%inst_results,\%curr_rules,%got_rules);
505: if ($result eq 'notallowed') {
506: &invalid_request($r,14);
507: } elsif ($result eq 'ok') {
508: if (($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'mapcrs'}) &&
509: ($lti{$itemid}{'makecrs'})) {
510: unless (&Apache::lonnet::usertools_access($uname,$udom,'lti','reload','requestcourses')) {
511: &Apache::lonnet::put('environment',{ 'requestcourses.lti' => 'autolimit=', },$udom,$uname);
512: }
513: }
514: } else {
515: &invalid_request($r,15);
516: return OK;
517: }
518: } else {
519: &invalid_request($r,16);
520: return OK;
521: }
522: }
523: } else {
524: &invalid_request($r,17);
525: return OK;
526: }
527:
528: #
529: # If no LON-CAPA course available, check if domain's configuration
530: # for the specific LTI Consumer allows a new course to be created
531: # (requires role in Consumer to be: Instructor and Instructor to map to CC)
532: #
533:
534: my $reqcrs;
535: if ($cnum eq '') {
536: if ((@ltiroles) && ($lti{$itemid}{'mapcrs'}) &&
537: ($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'makecrs'})) {
538: my (%can_request,%request_domains);
539: &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
540: if ($can_request{'lti'}) {
541: $reqcrs = 1;
542: <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,undef,$mapurl,$tail,
543: $symb,$cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,
544: $reqcrs,$sourcecrs);
545: } else {
546: &invalid_request($r,18);
547: }
548: } else {
549: &invalid_request($r,19);
550: }
551: return OK;
552: }
553:
554: #
555: # If LON-CAPA course is a Community, and LON-CAPA role
556: # indicated is cc, change role indicated to co.
557: #
558:
559: my %crsenv;
560: if ($lcroles[0] eq 'cc') {
561: if (($cdom ne '') && ($cnum ne '')) {
562: %crsenv = &Apache::lonnet::coursedescription($cdom.'_'.$cnum,{ 'one_time' => 1,});
563: if ($crsenv{'type'} eq 'Community') {
564: $lcroles[0] = 'co';
565: }
566: }
567: }
568:
569: #
570: # Determine if user has a LON-CAPA role in the mapped LON-CAPA course.
571: # If multiple LON-CAPA roles are available for the user's assigned LTI roles,
572: # choose the first available LON-CAPA role in the order: cc/co, in, ta, ep, st
573: #
574:
575: my ($role,$usec,$withsec);
576: unless ((($lcroles[0] eq 'cc') || ($lcroles[0] eq 'co')) && (@lcroles == 1)) {
577: if ($lti{$itemid}{'section'} ne '') {
578: if ($lti{$itemid}{'section'} eq 'course_section_sourcedid') {
579: if ($env{'form.course_section_sourcedid'} !~ /\W/) {
580: $usec = $env{'form.course_section_sourcedid'};
581: }
582: } elsif ($env{'form.'.$lti{$itemid}{'section'}} !~ /\W/) {
583: $usec = $env{'form.'.$lti{$itemid}{'section'}};
584: }
585: }
586: if ($usec ne '') {
587: $withsec = 1;
588: }
589: }
590:
591: if (@lcroles) {
592: my %crsroles = &Apache::lonnet::get_my_roles($uname,$udom,'userroles',undef,\@lcroles,
593: [$cdom],$withsec);
594: foreach my $reqrole (@lcroles) {
595: if ($withsec) {
596: my $incsec;
597: if (($reqrole eq 'cc') || ($reqrole eq 'co')) {
598: $incsec = '';
599: } else {
600: $incsec = $usec;
601: }
602: if (exists($crsroles{$cnum.':'.$cdom.':'.$reqrole.':'.$incsec})) {
603: $role = $reqrole.'./'.$cdom.'/'.$cnum;
604: if ($incsec ne '') {
605: $role .= '/'.$usec;
606: }
607: last;
608: }
609: } else {
610: if (exists($crsroles{$cnum.':'.$cdom.':'.$reqrole})) {
611: $role = $reqrole.'./'.$cdom.'/'.$cnum;
612: last;
613: }
614: }
615: }
616: }
617:
618: #
619: # Determine if user can selfenroll
620: #
621:
622: my ($reqrole,$selfenrollrole);
623: if ($role eq '') {
624: if ((@ltiroles) && (ref($lti{$itemid}{'selfenroll'}) eq 'ARRAY')) {
625: foreach my $ltirole (@ltiroles) {
626: if (grep(/^\Q$ltirole\E$/,@{$lti{$itemid}{'selfenroll'}})) {
627: if (ref($lti{$itemid}{maproles}) eq 'HASH') {
628: $reqrole = $lti{$itemid}{maproles}{$ltirole};
629: last;
630: }
631: }
632: }
633: }
634: if ($reqrole eq '') {
635: &invalid_request($r,20);
636: return OK;
637: } else {
638: unless (%crsenv) {
639: %crsenv = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
640: }
641: my $default_enrollment_start_date = $crsenv{'default_enrollment_start_date'};
642: my $default_enrollment_end_date = $crsenv{'default_enrollment_end_date'};
643: my $now = time;
644: if ($default_enrollment_end_date && $default_enrollment_end_date <= $now) {
645: &invalid_request($r,21);
646: return OK;
647: } elsif ($default_enrollment_start_date && $default_enrollment_start_date >$now) {
648: &invalid_request($r,22);
649: return OK;
650: } else {
651: $selfenrollrole = $reqrole.'./'.$cdom.'/'.$cnum;
652: if (($withsec) && ($reqrole ne 'cc') && ($reqrole ne 'co')) {
653: if ($usec ne '') {
654: $selfenrollrole .= '/'.$usec;
655: }
656: }
657: }
658: }
659: }
660:
661: #
662: # Store consumer-to-LON-CAPA course mapping
663: #
664:
665: if (($sourcecrs ne '') && ($consumers{$sourcecrs} eq '') && ($cnum ne '')) {
666: &Apache::lonnet::put_dom('lticonsumers',{ $sourcecrs => $cnum },$cdom);
667: }
668:
669: #
670: # Start user session
671: #
672:
673: <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,$role,$mapurl,$tail,$symb,
674: $cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,undef,$sourcecrs,
675: $selfenrollrole);
676: return OK;
677: }
678:
679: sub lti_enroll {
680: my ($uname,$udom,$selfenrollrole) = @_;
681: my $enrollresult;
682: my ($role,$cdom,$cnum,$sec) =
683: ($selfenrollrole =~ m{^(\w+)\./($match_domain)/($match_courseid)(?:|/(\w*))$});
684: if (($cnum ne '') && ($cdom ne '')) {
685: my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
686: if ($chome ne 'no_host') {
687: my %coursehash = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
688: my $start = $coursehash{'default_enrollment_start_date'};
689: my $end = $coursehash{'default_enrollment_end_date'};
690: $enrollresult = &LONCAPA::ltiutils::enrolluser($udom,$uname,$role,$cdom,$cnum,$sec,
691: $start,$end,1);
692: }
693: }
694: return $enrollresult;
695: }
696:
697: sub lti_reqcrs {
698: my ($r,$cdom,$form,$uname,$udom) = @_;
699: my (%can_request,%request_domains);
700: &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
701: if ($can_request{'lti'}) {
702: my %domconfig = &Apache::lonnet::get_dom('configuration',['requestcourses'],$cdom);
703: my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
704: &Apache::lonrequestcourse::print_textbook_form($r,$cdom,[$cdom],\%domdefs,
705: $domconfig{'requestcourses'},
706: \%can_request,'lti',$form);
707: } else {
708: $r->print(
709: &Apache::loncommon::start_page('Invalid LTI call',undef,{'only_body' => 1}).
710: &mt('Invalid LTI call').
711: &Apache::loncommon::end_page()
712: );
713: }
714: }
715:
716: sub lti_session {
717: my ($r,$itemid,$uname,$udom,$uhome,$lonhost,$role,$mapurl,$tail,$symb,$cdom,$cnum,
718: $params,$ltiroles,$ltihash,$lcroles,$reqcrs,$sourcecrs,$selfenrollrole) = @_;
719: return unless ((ref($params) eq 'HASH') && (ref($ltiroles) eq 'ARRAY') &&
720: (ref($ltihash) eq 'HASH') && (ref($lcroles) eq 'ARRAY'));
721: #
722: # Check if user should be hosted here or switched to another server.
723: #
724: $r->user($uname);
725: if ($cnum) {
726: if ($role) {
727: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, role: $role, course: $cdom\_$cnum");
728: } elsif ($selfenrollrole =~ m{^(\w+)\./$cdom/$cnum}) {
729: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, desired role: $1 course: $cdom\_$cnum");
730: }
731: } else {
732: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, course dom: $cdom");
733: }
734: my ($is_balancer,$otherserver,$hosthere);
735: ($is_balancer,$otherserver) =
736: &Apache::lonnet::check_loadbalancing($uname,$udom,'login');
737: if ($is_balancer) {
738: if ($otherserver eq '') {
739: my $lowest_load;
740: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($udom);
741: if ($lowest_load > 100) {
742: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$udom);
743: }
744: }
745: if ($otherserver ne '') {
746: my @hosts = &Apache::lonnet::current_machine_ids();
747: if (grep(/^\Q$otherserver\E$/,@hosts)) {
748: $hosthere = $otherserver;
749: }
750: }
751: }
752: if (($is_balancer) && (!$hosthere)) {
753: # login but immediately go to switch server.
754: &Apache::lonauth::success($r,$uname,$udom,$uhome,'noredirect');
755: if ($symb) {
756: $env{'form.symb'} = $symb;
757: $env{'request.lti.uri'} = $tail;
758: } else {
759: if ($mapurl) {
760: $env{'form.origurl'} = $mapurl;
761: $env{'request.lti.uri'} = $mapurl;
762: } elsif ($tail =~ m{^\Q/tiny/$cdom/\E\w+$}) {
763: $env{'form.origurl'} = $tail;
764: $env{'request.lti.uri'} = $tail;
765: } elsif ($tail eq "/$cdom/$cnum") {
766: $env{'form.origurl'} = '/adm/navmaps';
767: $env{'request.lti.uri'} = $tail;
768: } else {
769: unless ($tail eq '/adm/roles') {
770: $env{'form.origurl'} = '/adm/navmaps';
771: }
772: }
773: }
774: if ($role) {
775: $env{'form.role'} = $role;
776: }
777: if (($lcroles->[0] eq 'cc') && ($reqcrs)) {
778: $env{'request.lti.reqcrs'} = 1;
779: $env{'request.lti.reqrole'} = 'cc';
780: $env{'request.lti.sourcecrs'} = $sourcecrs;
781: }
782: if ($selfenrollrole) {
783: $env{'request.lti.selfenroll'} = $selfenrollrole;
784: $env{'request.lti.sourcecrs'} = $sourcecrs;
785: }
786: if ($ltihash->{'passback'}) {
787: if ($params->{'lis_result_sourcedid'}) {
788: $env{'request.lti.passbackid'} = $params->{'lis_result_sourcedid'};
789: }
790: if ($params->{'lis_outcome_service_url'}) {
791: $env{'request.lti.passbackurl'} = $params->{'lis_outcome_service_url'};
792: }
793: }
794: if (($ltihash->{'roster'}) && (grep(/^Instructor$/,@{$ltiroles}))) {
795: if ($params->{'ext_ims_lis_memberships_id'}) {
796: $env{'request.lti.rosterid'} = $params->{'ext_ims_lis_memberships_id'};
797: }
798: if ($params->{'ext_ims_lis_memberships_url'}) {
799: $env{'request.lti.rosterurl'} = $params->{'ext_ims_lis_memberships_url'};
800: }
801: }
802: $env{'request.lti.login'} = $itemid;
803: if ($params->{'launch_presentation_document_target'}) {
804: $env{'request.lti.target'} = $params->{'launch_presentation_document_target'};
805: }
806: foreach my $key (%{$params}) {
807: delete($env{'form.'.$key});
808: }
809: my $redirecturl = '/adm/switchserver';
810: if ($otherserver ne '') {
811: $redirecturl .= '?otherserver='.$otherserver;
812: }
813: $r->internal_redirect($redirecturl);
814: $r->set_handlers('PerlHandler'=> undef);
815: } else {
816: # need to login them in, so generate the need data that
817: # migrate expects to do login
818: foreach my $key (%{$params}) {
819: delete($env{'form.'.$key});
820: }
821: my $ip = $r->get_remote_host();
822: my %info=('ip' => $ip,
823: 'domain' => $udom,
824: 'username' => $uname,
825: 'server' => $lonhost,
826: 'lti.login' => $itemid,
827: 'lti.uri' => $tail,
828: );
829: if ($role) {
830: $info{'role'} = $role;
831: }
832: if ($symb) {
833: $info{'symb'} = $symb;
834: }
835: if (($lcroles->[0] eq 'cc') && ($reqcrs)) {
836: $info{'lti.reqcrs'} = 1;
837: $info{'lti.reqrole'} = 'cc';
838: $info{'lti.sourcecrs'} = $sourcecrs;
839: }
840: if ($selfenrollrole) {
841: $info{'lti.selfenrollrole'} = $selfenrollrole;
842: }
843: if ($ltihash->{'passback'}) {
844: if ($params->{'lis_result_sourcedid'}) {
845: $info{'lti.passbackid'} = $params->{'lis_result_sourcedid'}
846: }
847: if ($params->{'lis_outcome_service_url'}) {
848: $info{'lti.passbackurl'} = $params->{'lis_outcome_service_url'}
849: }
850: }
851: if (($ltihash->{'roster'}) && (grep(/^Instructor$/,@{$ltiroles}))) {
852: if ($params->{'ext_ims_lis_memberships_id'}) {
853: $info{'lti.rosterid'} = $params->{'ext_ims_lis_memberships_id'};
854: }
855: if ($params->{'ext_ims_lis_memberships_url'}) {
856: $info{'lti.rosterurl'} = $params->{'ext_ims_lis_memberships_url'};
857: }
858: }
859: if ($params->{'launch_presentation_document_target'}) {
860: $info{'lti.target'} = $params->{'launch_presentation_document_target'};
861: }
862:
863: unless ($info{'symb'}) {
864: if ($mapurl) {
865: $info{'origurl'} = $mapurl;
866: } elsif ($tail =~ m{^\Q/tiny/$cdom/\E\w+$}) {
867: $info{'origurl'} = $tail;
868: } else {
869: unless ($tail eq '/adm/roles') {
870: $info{'origurl'} = '/adm/navmaps';
871: }
872: }
873: }
874: if (($is_balancer) && ($hosthere)) {
875: $info{'noloadbalance'} = $hosthere;
876: }
877: my $token = &Apache::lonnet::tmpput(\%info,$lonhost);
878: $env{'form.token'} = $token;
879: $r->internal_redirect('/adm/migrateuser');
880: $r->set_handlers('PerlHandler'=> undef);
881: }
882: return;
883: }
884:
885: sub invalid_request {
886: my ($r,$num) = @_;
887: &Apache::loncommon::content_type($r,'text/html');
888: $r->send_http_header;
889: if ($r->header_only) {
890: return;
891: }
892: &Apache::lonlocal::get_language_handle($r);
893: $r->print(
894: &Apache::loncommon::start_page('Invalid LTI call','',{ 'only_body' => 1,}).
895: &mt('Invalid LTI call [_1]',$num).
896: &Apache::loncommon::end_page());
897: return;
898: }
899:
900: 1;
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