File:
[LON-CAPA] /
loncom /
lti /
ltiauth.pm
Revision
1.7:
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Fri Mar 23 18:08:45 2018 UTC (6 years, 2 months ago) by
raeburn
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MAIN
CVS tags:
HEAD
- Bug 6754 LON-CAPA as LTI Provider
- Assign randomly generated password to user in LON-CAPA if configuration
for LTI Consumer permits both LTI auth and LON-CAPA log-in (internal) for
a new user.
1: # The LearningOnline Network
2: # Basic LTI Authentication Module
3: #
4: # $Id: ltiauth.pm,v 1.7 2018/03/23 18:08:45 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 = $r->uri;
45: #
46: # Retrieve data POSTed by LTI Consumer on launch
47: #
48: &Apache::lonacc::get_posted_cgi($r);
49: my $params = {};
50: foreach my $key (sort(keys(%env))) {
51: if ($key =~ /^form\.(.+)$/) {
52: $params->{$1} = $env{$key};
53: }
54: }
55:
56: unless (keys(%{$params})) {
57: &invalid_request($r,1);
58: return OK;
59: }
60:
61: unless ($params->{'oauth_consumer_key'} &&
62: $params->{'oauth_nonce'} &&
63: $params->{'oauth_timestamp'} &&
64: $params->{'oauth_version'} &&
65: $params->{'oauth_signature'} &&
66: $params->{'oauth_signature_method'}) {
67: &invalid_request($r,2);
68: return OK;
69: }
70:
71: #
72: # Retrieve "internet domains" for all this institution's LON-CAPA
73: # nodes.
74: #
75: my ($udom,$uname,$uhome,$cdom,$cnum,$symb,$mapurl,@intdoms);
76: my $lonhost = $r->dir_config('lonHostID');
77: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
78: if (ref($internet_names) eq 'ARRAY') {
79: @intdoms = @{$internet_names};
80: }
81:
82: #
83: # For user who launched LTI in Consumer, determine user's domain in
84: # LON-CAPA.
85: #
86: # Order is:
87: #
88: # (a) from custom_userdomain item in POSTed data
89: # (b) from lis_person_sourcedid in POSTed data
90: # (c) from default "log-in" domain for node
91: # (can support multidomain servers, where specific domain is
92: # first part of hostname).
93: #
94: # Note: "internet domain" for user's domain must be one of the
95: # "internet domain(s)" for the institution's LON-CAPA servers.
96: #
97: if (exists($params->{'custom_userdomain'})) {
98: if ($params->{'custom_userdomain'} =~ /^$match_domain$/) {
99: my $uprimary_id = &Apache::lonnet::domain($params->{'custom_userdomain'},'primary');
100: if ($uprimary_id ne '') {
101: my $uintdom = &Apache::lonnet::internet_dom($uprimary_id);
102: if (($uintdom ne '') && (grep(/^\Q$uintdom\E$/,@intdoms))) {
103: $udom = $params->{'custom_userdomain'};
104: }
105: }
106: }
107: }
108: my $defdom = &Apache::lonnet::default_login_domain();
109: my ($domain,$possuname,$possudom,$possmapuser);
110: if ($env{'form.lis_person_sourcedid'} =~ /^($match_username)\:($match_domain)$/) {
111: ($possuname,$possudom) = ($1,$2);
112: if ($udom eq '') {
113: my $uintdom = &Apache::lonnet::domain($possudom,'primary');
114: if (($uintdom ne '') && (grep(/^\Q$uintdom\E$/,@intdoms))) {
115: $udom = $possudom;
116: $possmapuser = 'lis_person_sourcedid';
117: } else {
118: $udom = $defdom;
119: }
120: } elsif ($udom eq $possudom) {
121: $possmapuser = 'lis_person_sourcedid';
122: }
123: }
124: unless ($possuname) {
125: if ($env{'form.lis_person_sourcedid'} =~ /^$match_username$/) {
126: $possuname = $env{'form.lis_person_sourcedid'};
127: $possmapuser = 'lis_person_sourcedid';
128: } elsif ($env{'form.lis_person_contact_email_primary'} =~ /^$match_username$/) {
129: $possuname = $env{'form.lis_person_contact_email_primary'};
130: $possmapuser = 'lis_person_contact_email_primary';
131: }
132: unless ($udom) {
133: $udom = $defdom;
134: }
135: }
136:
137: #
138: # Determine course's domain in LON-CAPA
139: #
140: # Order is:
141: #
142: # (a) from custom_coursedomain item in POSTed data
143: # (b) from tail of requested URL (after /adm/lti) if it has format of a symb
144: # (c) from tail of requested URL (after /adm/lti) if it has format of a map
145: # (d) from tail of requested URL (after /adm/lti) if it has format /domain/courseID
146: # (e) from tail of requested URL (after /adm/lti) if it has format /tiny/domain/\w+
147: # i.e., a shortened URL (see bug #6400).
148: # (f) same as user's domain
149: #
150: # Request invalid if custom_coursedomain is defined and is inconsistent with
151: # domain contained in requested URL.
152: #
153: # Note: "internet domain" for course's domain must be one of the
154: # internet domains for the institution's LON-CAPA servers.
155: #
156:
157: if (exists($params->{'custom_coursedomain'})) {
158: if ($params->{'custom_coursedomain'} =~ /^$match_domain$/) {
159: my $cprimary_id = &Apache::lonnet::domain($params->{'custom_coursedomain'},'primary');
160: if ($cprimary_id ne '') {
161: my $cintdom = &Apache::lonnet::internet_dom($cprimary_id);
162: if (($cintdom ne '') && (grep(/^\Q$cintdom\E$/,@intdoms))) {
163: $cdom = $params->{'custom_coursedomain'};
164: }
165: }
166: }
167: }
168:
169: my ($tail) = ($requri =~ m{^/adm/lti(|/.*)$});
170: my $urlcnum;
171: if ($tail ne '') {
172: my $urlcdom;
173: if ($tail =~ m{^/uploaded/($match_domain)/($match_courseid)/(?:default|supplemental)(?:|_\d+)\.(?:sequence|page)(|___\d+___.+)$}) {
174: ($urlcdom,$urlcnum,my $rest) = ($1,$2,$3);
175: if (($cdom ne '') && ($cdom ne $urlcdom)) {
176: &invalid_request($r,3);
177: return OK;
178: }
179: if ($rest eq '') {
180: $mapurl = $tail;
181: } else {
182: $symb = $tail;
183: $symb =~ s{^/+}{};
184: }
185: } elsif ($tail =~ m{^/($match_domain)/($match_courseid)$}) {
186: ($urlcdom,$urlcnum) = ($1,$2);
187: if (($cdom ne '') && ($cdom ne $urlcdom)) {
188: &invalid_request($r,4);
189: return OK;
190: }
191: } elsif ($tail =~ m{^/tiny/($match_domain)/(\w+)$}) {
192: ($urlcdom,my $key) = ($1,$2);
193: if (($cdom ne '') && ($cdom ne $urlcdom)) {
194: &invalid_request($r,5);
195: return OK;
196: }
197: my $tinyurl;
198: my ($result,$cached)=&Apache::lonnet::is_cached_new('tiny',$urlcdom."\0".$key);
199: if (defined($cached)) {
200: $tinyurl = $result;
201: } else {
202: my $configuname = &Apache::lonnet::get_domainconfiguser($urlcdom);
203: my %currtiny = &Apache::lonnet::get('tiny',[$key],$urlcdom,$configuname);
204: if ($currtiny{$key} ne '') {
205: $tinyurl = $currtiny{$key};
206: &Apache::lonnet::do_cache_new('tiny',$urlcdom."\0".$key,$currtiny{$key},600);
207: }
208: }
209: if ($tinyurl ne '') {
210: $urlcnum = (split(/\&/,$tinyurl))[0];
211: }
212: }
213: if (($cdom eq '') && ($urlcdom ne '')) {
214: my $cprimary_id = &Apache::lonnet::domain($urlcdom,'primary');
215: if ($cprimary_id ne '') {
216: my $cintdom = &Apache::lonnet::internet_dom($cprimary_id);
217: if (($cintdom ne '') && (grep(/^\Q$cintdom\E$/,@intdoms))) {
218: $cdom = $urlcdom;
219: }
220: } else {
221: $urlcnum = '';
222: }
223: }
224: }
225: if ($cdom eq '') {
226: if ($udom ne '') {
227: $cdom = $udom;
228: } else {
229: $cdom = $defdom;
230: }
231: }
232:
233: #
234: # Retrieve information for LTI Consumers in course domain
235: # and populate hash -- %lti_by_key -- for which keys
236: # are those defined in domain configuration for LTI.
237: #
238:
239: my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
240: unless (keys(%lti) > 0) {
241: &invalid_request($r,6);
242: return OK;
243: }
244: my %lti_by_key;
245: if (keys(%lti)) {
246: foreach my $id (keys(%lti)) {
247: if (ref($lti{$id}) eq 'HASH') {
248: my $key = $lti{$id}{'key'};
249: push(@{$lti_by_key{$key}},$id);
250: }
251: }
252: }
253:
254: #
255: # Verify the signed request using the secret for those
256: # Consumers for which the key in the POSTed data matches
257: # keys in the domain configuration for LTI.
258: #
259: my $hostname = $r->hostname;
260: my $protocol = 'http';
261: if ($ENV{'SERVER_PORT'} == 443) {
262: $protocol = 'https';
263: }
264:
265: my ($itemid,$consumer_key,$secret);
266: $consumer_key = $params->{'oauth_consumer_key'};
267: if (ref($lti_by_key{$consumer_key}) eq 'ARRAY') {
268: foreach my $id (@{$lti_by_key{$consumer_key}}) {
269: if (ref($lti{$id}) eq 'HASH') {
270: $secret = $lti{$id}{'secret'};
271: my $request = Net::OAuth->request('request token')->from_hash($params,
272: request_url => $protocol.'://'.$hostname.$requri,
273: request_method => $env{'request.method'},
274: consumer_secret => $secret,);
275: if ($request->verify()) {
276: $itemid = $id;
277: last;
278: }
279: }
280: }
281: }
282:
283: #
284: # Request is invalid if the signed request could not be verified
285: # for the Consumer key and Consumer secret from the domain
286: # configuration in LON-CAPA for that LTI Consumer.
287: #
288: unless (($itemid) && (ref($lti{$itemid}) eq 'HASH')) {
289: &invalid_request($r,7);
290: return OK;
291: }
292:
293: #
294: # Determine if nonce in POSTed data has expired.
295: # If unexpired, confirm it has not already been used.
296: #
297: unless (&LONCAPA::ltiutils::check_nonce($params->{'oauth_nonce'},$params->{'oauth_timestamp'},
298: $lti{$itemid}{'lifetime'},$cdom,$r->dir_config('lonLTIDir'))) {
299: &invalid_request($r,8);
300: return OK;
301: }
302:
303: #
304: # Determine if source of username matches requirement from the
305: # domain configuration for the specific LTI Consumer.
306: #
307:
308: if ($lti{$itemid}{'mapuser'} eq $possmapuser) {
309: $uname = $possuname;
310: } elsif ($lti{$itemid}{'mapuser'} eq 'lis_person_sourcedid') {
311: if ($params->{'lis_person_sourcedid'} =~ /^$match_username$/) {
312: $uname = $possuname;
313: }
314: } elsif ($lti{$itemid}{'mapuser'} eq 'lis_person_contact_email_primary') {
315: if ($params->{'lis_person_contact_email_primary'} =~ /^$match_username$/) {
316: $uname = $params->{'lis_person_contact_email_primary'};
317: }
318: } elsif (exists($params->{$lti{$itemid}{'mapuser'}})) {
319: if ($params->{$lti{$itemid}{'mapuser'}} =~ /^$match_username$/) {
320: $uname = $params->{$lti{$itemid}{'mapuser'}};
321: }
322: }
323:
324: #
325: # Determine the courseID of the LON-CAPA course to which the
326: # launch of LON-CAPA should provide access.
327: #
328: # Order is:
329: #
330: # (a) from course mapping (if the link between Consumer "course" and
331: # Provider "course" has been established previously).
332: # (b) from tail of requested URL (after /adm/lti) if it has format of a symb
333: # (c) from tail of requested URL (after /adm/lti) if it has format of a map
334: # (d) from tail of requested URL (after /adm/lti) if it has format /domain/courseID
335: # (e) from tail of requested URL (after /adm/lti) if it has format /tiny/domain/\w+
336: # i.e., a shortened URL (see bug #6400).
337: #
338: # If Consumer course included in POSTed data points as a target course which
339: # has a format which matches a LON-CAPA courseID, but the course does not
340: # exist, the request is invalid.
341: #
342:
343: my ($sourcecrs,%consumers);
344: if ($lti{$itemid}{'mapcrs'} eq 'course_offering_sourcedid') {
345: $sourcecrs = $params->{'course_offering_sourcedid'};
346: } elsif ($lti{$itemid}{'mapcrs'} eq 'context_id') {
347: $sourcecrs = $params->{'context_id'};
348: } elsif ($lti{$itemid}{'mapcrs'} ne '') {
349: $sourcecrs = $params->{$lti{$itemid}{'mapcrs'}};
350: }
351:
352: my $posscnum;
353: if ($sourcecrs ne '') {
354: %consumers = &Apache::lonnet::get_dom('lticonsumers',[$sourcecrs],$cdom);
355: if (exists($consumers{$sourcecrs})) {
356: if ($consumers{$sourcecrs} =~ /^$match_courseid$/) {
357: my $crshome = &Apache::lonnet::homeserver($consumers{$sourcecrs},$cdom);
358: if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
359: &invalid_request($r,9);
360: return OK;
361: } else {
362: $posscnum = $consumers{$sourcecrs};
363: }
364: }
365: }
366: }
367:
368: if ($urlcnum ne '') {
369: if ($posscnum ne '') {
370: if ($posscnum ne $urlcnum) {
371: &invalid_request($r,10);
372: return OK;
373: } else {
374: $cnum = $posscnum;
375: }
376: } else {
377: my $crshome = &Apache::lonnet::homeserver($urlcnum,$cdom);
378: if ($crshome =~ /(con_lost|no_host|no_such_host)/) {
379: &invalid_request($r,11);
380: return OK;
381: } else {
382: $cnum = $urlcnum;
383: }
384: }
385: } elsif ($posscnum ne '') {
386: $cnum = $posscnum;
387: }
388:
389: #
390: # Get LON-CAPA role(s) to use from role-mapping of Consumer roles
391: # defined in domain configuration for the appropriate LTI
392: # Consumer.
393: #
394: # If multiple LON-CAPA roles are indicated for the current user,
395: # ordering (from first to last) is: cc/co, in, ta, ep, st.
396: #
397:
398: my (@ltiroles,@lcroles);
399:
400: my @lcroleorder = ('cc','in','ta','ep','st');
401: my @ltiroleorder = ('Instructor','TeachingAssistant','Mentor','Learner');
402: if ($params->{'roles'} =~ /,/) {
403: my @possltiroles = split(/\s*,\s*/,$params->{'role'});
404: foreach my $ltirole (@ltiroleorder) {
405: if (grep(/^\Q$ltirole\E$/,@possltiroles)) {
406: push(@ltiroles,$ltirole);
407: }
408: }
409: } else {
410: my $singlerole = $params->{'roles'};
411: $singlerole =~ s/^\s|\s+$//g;
412: if (grep(/^\Q$singlerole\E$/,@ltiroleorder)) {
413: @ltiroles = ($singlerole);
414: }
415: }
416: if (@ltiroles) {
417: if (ref($lti{$itemid}{maproles}) eq 'HASH') {
418: my %possroles;
419: map { $possroles{$lti{$itemid}{maproles}{$_}} = 1; } @ltiroles;
420: if (keys(%possroles) > 0) {
421: foreach my $item (@lcroleorder) {
422: if ($possroles{$item}) {
423: push(@lcroles,$item);
424: }
425: }
426: }
427: }
428: }
429:
430: #
431: # If no LON-CAPA username -- is user allowed to create one?
432: #
433:
434: my $selfcreate;
435: if (($uname ne '') && ($udom ne '')) {
436: $uhome = &Apache::lonnet::homeserver($uname,$udom);
437: if ($uhome =~ /(con_lost|no_host|no_such_host)/) {
438: &Apache::lonnet::logthis(" LTI authorized unknown user $uname:$udom ");
439: if (ref($lti{$itemid}{'makeuser'}) eq 'ARRAY') {
440: if (@{$lti{$itemid}{'makeuser'}} > 0) {
441: foreach my $ltirole (@ltiroles) {
442: if (grep(/^\Q$ltirole\E$/,@{$lti{$itemid}{'makeuser'}})) {
443: $selfcreate = 1;
444: last;
445: }
446: }
447: }
448: }
449: if ($selfcreate) {
450: my (%rulematch,%inst_results,%curr_rules,%got_rules,%alerts,%info);
451: my $checkhash = { "$uname:$udom" => { 'newuser' => 1, }, };
452: my $checks = { 'username' => 1, };
453: &Apache::loncommon::user_rule_check($checkhash,$checks,\%alerts,\%rulematch,
454: \%inst_results,\%curr_rules,\%got_rules);
455: my ($userchkmsg,$lcauth,$lcauthparm);
456: my $allowed = 1;
457: if (ref($alerts{'username'}) eq 'HASH') {
458: if (ref($alerts{'username'}{$udom}) eq 'HASH') {
459: my $domdesc =
460: &Apache::lonnet::domain($udom,'description');
461: if ($alerts{'username'}{$udom}{$uname}) {
462: if (ref($curr_rules{$udom}) eq 'HASH') {
463: $userchkmsg =
464: &Apache::loncommon::instrule_disallow_msg('username',$domdesc,1).
465: &Apache::loncommon::user_rule_formats($udom,$domdesc,
466: $curr_rules{$udom}{'username'},
467: 'username');
468: }
469: $allowed = 0;
470: }
471: }
472: }
473: if ($allowed) {
474: if (ref($rulematch{$uname.':'.$udom}) eq 'HASH') {
475: my $matchedrule = $rulematch{$uname.':'.$udom}{'username'};
476: my ($rules,$ruleorder) =
477: &Apache::lonnet::inst_userrules($udom,'username');
478: if (ref($rules) eq 'HASH') {
479: if (ref($rules->{$matchedrule}) eq 'HASH') {
480: $lcauth = $rules->{$matchedrule}{'authtype'};
481: $lcauthparm = $rules->{$matchedrule}{'authparm'};
482: }
483: }
484: }
485: if ($lcauth eq '') {
486: $lcauth = $lti{$itemid}{'lcauth'};
487: if ($lcauth eq 'internal') {
488: $lcauthparm = &create_passwd();
489: } else {
490: $lcauthparm = $lti{$itemid}{'lcauthparm'};
491: }
492: }
493: } else {
494: &invalid_request($r,12);
495: }
496: my @userinfo = ('firstname','middlename','lastname','generation',
497: 'permanentemail','id');
498: my %useinstdata;
499: if (ref($lti{$itemid}{'instdata'}) eq 'ARRAY') {
500: map { $useinstdata{$_} = 1; } @{$lti{$itemid}{'instdata'}};
501: }
502: foreach my $item (@userinfo) {
503: if (($useinstdata{$item}) && (ref($inst_results{$uname.':'.$udom}) eq 'HASH') &&
504: ($inst_results{$uname.':'.$udom}{$item} ne '')) {
505: $info{$item} = $inst_results{$uname.':'.$udom}{$item};
506: } else {
507: if ($item eq 'permanentemail') {
508: if ($env{'form.lis_person_contact_email_primary'} =~/^[^\@]+\@[^@]+$/) {
509: $info{$item} = $env{'form.lis_person_contact_email_primary'};
510: }
511: } elsif ($item eq 'firstname') {
512: $info{$item} = $env{'form.lis_person_name_given'};
513: } elsif ($item eq 'lastname') {
514: $info{$item} = $env{'form.lis_person_name_family'};
515: }
516: }
517: }
518: if (($info{'middlename'} eq '') && ($env{'form.lis_person_name_full'} ne '')) {
519: unless ($useinstdata{'middlename'}) {
520: my $fullname = $env{'form.lis_person_name_full'};
521: if ($info{'firstname'}) {
522: $fullname =~ s/^\s*\Q$info{'firstname'}\E\s*//i;
523: }
524: if ($info{'lastname'}) {
525: $fullname =~ s/\s*\Q$info{'lastname'}\E\s*$//i;
526: }
527: if ($fullname ne '') {
528: $fullname =~ s/^\s+|\s+$//g;
529: if ($fullname ne '') {
530: $info{'middlename'} = $fullname;
531: }
532: }
533: }
534: }
535: if (ref($inst_results{$uname.':'.$udom}{'inststatus'}) eq 'ARRAY') {
536: my @inststatuses = @{$inst_results{$uname.':'.$udom}{'inststatus'}};
537: $info{'inststatus'} = join(':',map { &escape($_); } @inststatuses);
538: }
539: my $result =
540: &Apache::lonnet::modifyuser($udom,$uname,$info{'id'},
541: $lcauth,$lcauthparm,$info{'firstname'},
542: $info{'middlename'},$info{'lastname'},
543: $info{'generation'},undef,undef,
544: $info{'permanentemail'},$info{'inststatus'});
545: if ($result eq 'ok') {
546: if (($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'mapcrs'}) &&
547: ($lti{$itemid}{'makecrs'})) {
548: unless (&Apache::lonnet::usertools_access($uname,$udom,'lti','reload','requestcourses')) {
549: &Apache::lonnet::put('environment',{ 'requestcourses.lti' => 1, },$udom,$uname);
550: }
551: }
552: } else {
553: &invalid_request($r,13);
554: return OK;
555: }
556: } else {
557: &invalid_request($r,14);
558: return OK;
559: }
560: }
561: } else {
562: &invalid_request($r,15);
563: return OK;
564: }
565:
566: #
567: # If no LON-CAPA course available, check if domain's configuration
568: # for the specific LTI Consumer allows a new course to be created
569: # (requires role in Consumer to be: Instructor and Instructor to map to CC)
570: #
571:
572: my $reqcrs;
573: if ($cnum eq '') {
574: if ((@ltiroles) && ($lti{$itemid}{'mapcrs'}) &&
575: ($ltiroles[0] eq 'Instructor') && ($lcroles[0] eq 'cc') && ($lti{$itemid}{'makecrs'})) {
576: my (%can_request,%request_domains);
577: &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
578: if ($can_request{'lti'}) {
579: $reqcrs = 1;
580: <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,undef,$mapurl,$tail,
581: $symb,$cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,
582: $reqcrs,$sourcecrs);
583: } else {
584: &invalid_request($r,16);
585: }
586: } else {
587: &invalid_request($r,17);
588: }
589: return OK;
590: }
591:
592: #
593: # If LON-CAPA course is a Community, and LON-CAPA role
594: # indicated is cc, change role indicated to co.
595: #
596:
597: my %crsenv;
598: if ($lcroles[0] eq 'cc') {
599: if (($cdom ne '') && ($cnum ne '')) {
600: %crsenv = &Apache::lonnet::coursedescription($cdom.'_'.$cnum,{ 'one_time' => 1,});
601: if ($crsenv{'type'} eq 'Community') {
602: $lcroles[0] = 'co';
603: }
604: }
605: }
606:
607: #
608: # Determine if user has a LON-CAPA role in the mapped LON-CAPA course.
609: # If multiple LON-CAPA roles are available for the user's assigned LTI roles,
610: # choose the first available LON-CAPA role in the order: cc/co, in, ta, ep, st
611: #
612:
613: my ($role,$usec,$withsec);
614: unless ((($lcroles[0] eq 'cc') || ($lcroles[0] eq 'co')) && (@lcroles == 1)) {
615: if ($lti{$itemid}{'section'} ne '') {
616: if ($lti{$itemid}{'section'} eq 'course_section_sourcedid') {
617: if ($env{'form.course_section_sourcedid'} !~ /\W/) {
618: $usec = $env{'form.course_section_sourcedid'};
619: }
620: } elsif ($env{'form.'.$lti{$itemid}{'section'}} !~ /\W/) {
621: $usec = $env{'form.'.$lti{$itemid}{'section'}};
622: }
623: }
624: if ($usec ne '') {
625: $withsec = 1;
626: }
627: }
628:
629: if (@lcroles) {
630: my %crsroles = &Apache::lonnet::get_my_roles($uname,$udom,'userroles',undef,\@lcroles,
631: [$cdom],$withsec);
632: foreach my $reqrole (@lcroles) {
633: if ($withsec) {
634: my $incsec;
635: if (($reqrole eq 'cc') || ($reqrole eq 'co')) {
636: $incsec = '';
637: } else {
638: $incsec = $usec;
639: }
640: if (exists($crsroles{$cnum.':'.$cdom.':'.$reqrole.':'.$incsec})) {
641: $role = $reqrole.'./'.$cdom.'/'.$cnum;
642: if ($incsec ne '') {
643: $role .= '/'.$usec;
644: }
645: last;
646: }
647: } else {
648: if (exists($crsroles{$cnum.':'.$cdom.':'.$reqrole})) {
649: $role = $reqrole.'./'.$cdom.'/'.$cnum;
650: last;
651: }
652: }
653: }
654: }
655:
656: #
657: # Determine if user can selfenroll
658: #
659:
660: my ($reqrole,$selfenrollrole);
661: if ($role eq '') {
662: if ((@ltiroles) && (ref($lti{$itemid}{'selfenroll'}) eq 'ARRAY')) {
663: foreach my $ltirole (@ltiroles) {
664: if (grep(/^\Q$ltirole\E$/,@{$lti{$itemid}{'selfenroll'}})) {
665: if (ref($lti{$itemid}{maproles}) eq 'HASH') {
666: $reqrole = $lti{$itemid}{maproles}{$ltirole};
667: last;
668: }
669: }
670: }
671: }
672: if ($reqrole eq '') {
673: &invalid_request($r,18);
674: return OK;
675: } else {
676: unless (%crsenv) {
677: %crsenv = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
678: }
679: my $default_enrollment_start_date = $crsenv{'default_enrollment_start_date'};
680: my $default_enrollment_end_date = $crsenv{'default_enrollment_end_date'};
681: my $now = time;
682: if ($default_enrollment_end_date && $default_enrollment_end_date <= $now) {
683: &invalid_request($r,19);
684: return OK;
685: } elsif ($default_enrollment_start_date && $default_enrollment_start_date >$now) {
686: &invalid_request($r,20);
687: return OK;
688: } else {
689: $selfenrollrole = $reqrole.'./'.$cdom.'/'.$cnum;
690: if (($withsec) && ($reqrole ne 'cc') && ($reqrole ne 'co')) {
691: if ($usec ne '') {
692: $selfenrollrole .= '/'.$usec;
693: }
694: }
695: }
696: }
697: }
698:
699: #
700: # Store consumer-to-LON-CAPA course mapping
701: #
702:
703: if (($sourcecrs ne '') && ($consumers{$sourcecrs} eq '') && ($cnum ne '')) {
704: &Apache::lonnet::put_dom('lticonsumers',{ $sourcecrs => $cnum },$cdom);
705: }
706:
707: #
708: # Start user session
709: #
710:
711: <i_session($r,$itemid,$uname,$udom,$uhome,$lonhost,$role,$mapurl,$tail,$symb,
712: $cdom,$cnum,$params,\@ltiroles,$lti{$itemid},\@lcroles,undef,$sourcecrs,
713: $selfenrollrole);
714: return OK;
715: }
716:
717: sub lti_enroll {
718: my ($uname,$udom,$selfenrollrole) = @_;
719: my $enrollresult;
720: my ($role,$cdom,$cnum,$sec) =
721: ($selfenrollrole =~ m{^(\w+)\./($match_domain)/($match_courseid)(?:|/(\w*))$});
722: if (($cnum ne '') && ($cdom ne '')) {
723: my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
724: if ($chome ne 'no_host') {
725: my %coursehash = &Apache::lonnet::coursedescription($cdom.'_'.$cnum);
726: my $start = $coursehash{'default_enrollment_start_date'};
727: my $end = $coursehash{'default_enrollment_end_date'};
728: my $area = "/$cdom/$cnum";
729: if (($role ne 'cc') && ($role ne 'co') && ($sec ne '')) {
730: $area .= '/'.$sec;
731: }
732: my $spec = $role.'.'.$area;
733: my $instcid;
734: if ($role eq 'st') {
735: $enrollresult =
736: &Apache::lonnet::modify_student_enrollment($udom,$uname,undef,undef,undef,
737: undef,undef,$sec,$end,$start,
738: 'ltienroll',undef,$cdom.'_'.$cnum,1,
739: 'ltienroll','',$instcid);
740: } elsif ($role =~ /^(cc|in|ta|ep)$/) {
741: $enrollresult =
742: &Apache::lonnet::assignrole($udom,$uname,$area,$role,$end,$start,
743: undef,1,'ltienroll');
744: }
745: if ($enrollresult eq 'ok') {
746: my (%userroles,%newrole,%newgroups);
747: &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,
748: $area);
749: &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
750: $userroles{'user.role.'.$spec} = $start.'.'.$end;
751: &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
752: }
753: }
754: }
755: return $enrollresult;
756: }
757:
758: sub lti_reqcrs {
759: my ($r,$cdom,$form,$uname,$udom) = @_;
760: my (%can_request,%request_domains);
761: &Apache::lonnet::check_can_request($cdom,\%can_request,\%request_domains,$uname,$udom);
762: if ($can_request{'lti'}) {
763: my %domconfig = &Apache::lonnet::get_dom('configuration',['requestcourses'],$cdom);
764: my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
765: &Apache::lonrequestcourse::print_textbook_form($r,$cdom,[$cdom],\%domdefs,
766: $domconfig{'requestcourses'},
767: \%can_request,'lti',$form);
768: } else {
769: $r->print(
770: &Apache::loncommon::start_page('Invalid LTI call',undef,{'only_body' => 1}).
771: &mt('Invalid LTI call').
772: &Apache::loncommon::end_page()
773: );
774: }
775: }
776:
777: sub lti_session {
778: my ($r,$itemid,$uname,$udom,$uhome,$lonhost,$role,$mapurl,$tail,$symb,$cdom,$cnum,
779: $params,$ltiroles,$ltihash,$lcroles,$reqcrs,$sourcecrs,$selfenrollrole) = @_;
780: return unless ((ref($params) eq 'HASH') && (ref($ltiroles) eq 'ARRAY') &&
781: (ref($ltihash) eq 'HASH') && (ref($lcroles) eq 'ARRAY'));
782: #
783: # Check if user should be hosted here or switched to another server.
784: #
785: $r->user($uname);
786: if ($cnum) {
787: if ($role) {
788: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, role: $role, course: $cdom\_$cnum");
789: } elsif ($selfenrollrole =~ m{^(\w+)\./$cdom/$cnum}) {
790: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, desired role: $1 course: $cdom\_$cnum");
791: }
792: } else {
793: &Apache::lonnet::logthis(" LTI authorized user ($itemid): $uname:$udom, course dom: $cdom");
794: }
795: my ($is_balancer,$otherserver,$hosthere);
796: ($is_balancer,$otherserver) =
797: &Apache::lonnet::check_loadbalancing($uname,$udom,'login');
798: if ($is_balancer) {
799: if ($otherserver eq '') {
800: my $lowest_load;
801: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($udom);
802: if ($lowest_load > 100) {
803: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$udom);
804: }
805: }
806: if ($otherserver ne '') {
807: my @hosts = &Apache::lonnet::current_machine_ids();
808: if (grep(/^\Q$otherserver\E$/,@hosts)) {
809: $hosthere = $otherserver;
810: }
811: }
812: }
813: if (($is_balancer) && (!$hosthere)) {
814: # login but immediately go to switch server.
815: &Apache::lonauth::success($r,$uname,$udom,$uhome,'noredirect');
816: if ($symb) {
817: $env{'form.symb'} = $symb;
818: } else {
819: if ($mapurl) {
820: $env{'form.origurl'} = $mapurl;
821: } elsif ($tail =~ m{^\Q/tiny/$cdom/\E\w+$}) {
822: $env{'form.origurl'} = $tail;
823: } else {
824: unless ($tail eq '/adm/roles') {
825: $env{'form.origurl'} = '/adm/navmaps';
826: }
827: }
828: }
829: if ($role) {
830: $env{'form.role'} = $role;
831: }
832: if (($lcroles->[0] eq 'cc') && ($reqcrs)) {
833: $env{'request.lti.reqcrs'} = 1;
834: $env{'request.lti.reqrole'} = 'cc';
835: $env{'request.lti.sourcecrs'} = $sourcecrs;
836: }
837: if ($selfenrollrole) {
838: $env{'request.lti.selfenroll'} = $selfenrollrole;
839: $env{'request.lti.sourcecrs'} = $sourcecrs;
840: }
841: if ($ltihash->{'passback'}) {
842: if ($params->{'lis_result_sourcedid'}) {
843: $env{'request.lti.passbackid'} = $params->{'lis_result_sourcedid'};
844: }
845: if ($params->{'lis_outcome_service_url'}) {
846: $env{'request.lti.passbackurl'} = $params->{'lis_outcome_service_url'};
847: }
848: }
849: if (($ltihash->{'roster'}) && (grep(/^Instructor$/,@{$ltiroles}))) {
850: if ($params->{'ext_ims_lis_memberships_id'}) {
851: $env{'request.lti.rosterid'} = $params->{'ext_ims_lis_memberships_id'};
852: }
853: if ($params->{'ext_ims_lis_memberships_url'}) {
854: $env{'request.lti.rosterurl'} = $params->{'ext_ims_lis_memberships_url'};
855: }
856: }
857: $env{'request.lti.login'} = 1;
858: foreach my $key (%{$params}) {
859: delete($env{'form.'.$key});
860: }
861: my $redirecturl = '/adm/switchserver';
862: if ($otherserver ne '') {
863: $redirecturl .= '?otherserver='.$otherserver;
864: }
865: $r->internal_redirect($redirecturl);
866: $r->set_handlers('PerlHandler'=> undef);
867: } else {
868: # need to login them in, so generate the need data that
869: # migrate expects to do login
870: foreach my $key (%{$params}) {
871: delete($env{'form.'.$key});
872: }
873: my $ip = $r->get_remote_host();
874: my %info=('ip' => $ip,
875: 'domain' => $udom,
876: 'username' => $uname,
877: 'server' => $lonhost,
878: 'lti.login' => 1,
879: );
880: if ($role) {
881: $info{'role'} = $role;
882: }
883: if ($symb) {
884: $info{'symb'} = $symb;
885: }
886: if (($lcroles->[0] eq 'cc') && ($reqcrs)) {
887: $info{'lti.reqcrs'} = 1;
888: $info{'lti.reqrole'} = 'cc';
889: $info{'lti.sourcecrs'} = $sourcecrs;
890: }
891: if ($selfenrollrole) {
892: $info{'lti.selfenrollrole'} = $selfenrollrole;
893: }
894: if ($ltihash->{'passback'}) {
895: if ($params->{'lis_result_sourcedid'}) {
896: $info{'lti.passbackid'} = $params->{'lis_result_sourcedid'}
897: }
898: if ($params->{'lis_outcome_service_url'}) {
899: $info{'lti.passbackurl'} = $params->{'lis_outcome_service_url'}
900: }
901: }
902: if (($ltihash->{'roster'}) && (grep(/^Instructor$/,@{$ltiroles}))) {
903: if ($params->{'ext_ims_lis_memberships_id'}) {
904: $info{'lti.rosterid'} = $params->{'ext_ims_lis_memberships_id'};
905: }
906: if ($params->{'ext_ims_lis_memberships_url'}) {
907: $info{'lti.rosterurl'} = $params->{'ext_ims_lis_memberships_url'};
908: }
909: }
910: unless ($info{'symb'}) {
911: if ($mapurl) {
912: $info{'origurl'} = $mapurl;
913: } elsif ($tail =~ m{^\Q/tiny/$cdom/\E\w+$}) {
914: $info{'origurl'} = $tail;
915: } else {
916: unless ($tail eq '/adm/roles') {
917: $info{'origurl'} = '/adm/navmaps';
918: }
919: }
920: }
921: if (($is_balancer) && ($hosthere)) {
922: $info{'noloadbalance'} = $hosthere;
923: }
924: my $token = &Apache::lonnet::tmpput(\%info,$lonhost);
925: $env{'form.token'} = $token;
926: $r->internal_redirect('/adm/migrateuser');
927: $r->set_handlers('PerlHandler'=> undef);
928: }
929: return;
930: }
931:
932: sub invalid_request {
933: my ($r,$num) = @_;
934: &Apache::loncommon::content_type($r,'text/html');
935: $r->send_http_header;
936: if ($r->header_only) {
937: return;
938: }
939: &Apache::lonlocal::get_language_handle($r);
940: $r->print(
941: &Apache::loncommon::start_page('Invalid LTI call').
942: &mt('Invalid LTI call [_1]',$num).
943: &Apache::loncommon::end_page());
944: return;
945: }
946:
947: sub create_passwd {
948: my $passwd = '';
949: my @letts = ("a".."z");
950: for (my $i=0; $i<8; $i++) {
951: my $lettnum = int(rand(2));
952: my $item = '';
953: if ($lettnum) {
954: $item = $letts[int(rand(26))];
955: my $uppercase = int(rand(2));
956: if ($uppercase) {
957: $item =~ tr/a-z/A-Z/;
958: }
959: } else {
960: $item = int(rand(10));
961: }
962: $passwd .= $item;
963: }
964: return ($passwd);
965: }
966:
967: 1;
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