1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.121.2.24.2.7 2023/07/05 17:33:03 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::lonauth;
30:
31: use strict;
32: use LONCAPA qw(:DEFAULT :match);
33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use Apache::loncommon();
36: use Apache::lonnet;
37: use Apache::lonmenu();
38: use Apache::createaccount;
39: use Apache::ltiauth;
40: use Fcntl qw(:flock);
41: use Apache::lonlocal;
42: use Apache::File();
43: use HTML::Entities;
44: use Digest::MD5;
45: use CGI::Cookie();
46:
47: # ------------------------------------------------------------ Successful login
48: sub success {
49: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
50: $form,$skipcritical,$cid,$expirepub,$write_to_opener) = @_;
51:
52: # ------------------------------------------------------------ Get cookie ready
53: my $cookie =
54: &Apache::loncommon::init_user_environment($r, $username, $domain,
55: $authhost, $form,
56: {'extra_env' => $extra_env,});
57:
58: my $public=($username eq 'public' && $domain eq 'public');
59:
60: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
61:
62: # -------------------------------------------------------------------- Log this
63:
64: my $ip = &Apache::lonnet::get_requestor_ip();
65: &Apache::lonnet::log($domain,$username,$authhost,
66: "Login $ip");
67:
68: # ------------------------------------------------- Check for critical messages
69:
70: unless ($skipcritical) {
71: my @what=&Apache::lonnet::dump('critical',$domain,$username);
72: if ($what[0]) {
73: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
74: $lowerurl='/adm/email?critical=display';
75: }
76: }
77: }
78:
79: # ------------------------------------------------------------ Get cookies ready
80: my ($securecookie,$defaultcookie);
81: my $ssl = $r->subprocess_env('https');
82: if ($ssl) {
83: $securecookie="lonSID=$cookie; path=/; HttpOnly; secure";
84: my $lonidsdir=$r->dir_config('lonIDsDir');
85: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
86: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
87: if (-e "$lonidsdir/$linkname.id") {
88: unlink("$lonidsdir/$linkname.id");
89: }
90: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
91: "$lonidsdir/$linkname.id"); 1 };
92: if ($made_symlink) {
93: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
94: &Apache::lonnet::appenv({'user.linkedenv' => $linkname});
95: }
96: }
97: } else {
98: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
99: }
100: # -------------------------------------------------------- Menu script and info
101: my $destination = $lowerurl;
102: if ($env{'request.lti.login'}) {
103: if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) {
104: &Apache::loncommon::content_type($r,'text/html');
105: if ($securecookie) {
106: $r->headers_out->add('Set-cookie' => $securecookie);
107: }
108: if ($defaultcookie) {
109: $r->headers_out->add('Set-cookie' => $defaultcookie);
110: }
111: $r->send_http_header;
112: if (ref($form) eq 'HASH') {
113: $form->{'lti.login'} = $env{'request.lti.login'};
114: $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
115: $form->{'lti.reqrole'} = $env{'request.lti.reqrole'};
116: $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
117: }
118: &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain);
119: return;
120: }
121: if ($env{'request.lti.selfenrollrole'}) {
122: if (&Apache::ltiauth::lti_enroll($username,$domain,
123: $env{'request.lti.selfenrollrole'}) eq 'ok') {
124: $form->{'role'} = $env{'request.lti.selfenrollrole'};
125: &Apache::lonnet::delenv('request.lti.selfenrollrole');
126: } else {
127: &Apache::ltiauth::invalid_request($r,24);
128: }
129: }
130: }
131: if (defined($form->{role})) {
132: my $envkey = 'user.role.'.$form->{role};
133: my $now=time;
134: my $then=$env{'user.login.time'};
135: my $refresh=$env{'user.refresh.time'};
136: my $update=$env{'user.update.time'};
137: if (!$update) {
138: $update = $then;
139: }
140: if (exists($env{$envkey})) {
141: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
142: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
143: \$trolecode,\$tstatus,\$tstart,\$tend);
144: if ($tstatus eq 'is') {
145: $destination .= ($destination =~ /\?/) ? '&' : '?';
146: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
147: $destination .= 'selectrole=1&'.$newrole.'=1';
148: }
149: }
150: } elsif (defined($form->{display})) {
151: if ($destination =~ m{^/adm/email($|\?)}) {
152: $destination .= ($destination =~ /\?/) ? '&' : '?' .'display='.&escape($form->{display});
153: }
154: }
155: if (defined($form->{symb})) {
156: my $destsymb = $form->{symb};
157: my $encrypted;
158: if ($destsymb =~ m{^/enc/}) {
159: $encrypted = 1;
160: if ($cid) {
161: $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid);
162: }
163: }
164: $destination .= ($destination =~ /\?/) ? '&' : '?';
165: if ($destsymb =~ /___/) {
166: my ($map,$resid,$desturl)=split(/___/,$destsymb);
167: $desturl = &Apache::lonnet::clutter($desturl);
168: if ($encrypted) {
169: $desturl = &Apache::lonenc::encrypted($desturl,1,$cid);
170: $destsymb = $form->{symb};
171: }
172: $desturl = &HTML::Entities::encode($desturl,'"<>&');
173: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
174: $destination .= 'destinationurl='.$desturl.
175: '&destsymb='.$destsymb;
176: } elsif (!$encrypted) {
177: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
178: $destination .= 'destinationurl='.$destsymb;
179: }
180: }
181: if ($destination =~ m{^/adm/roles}) {
182: $destination .= ($destination =~ /\?/) ? '&' : '?';
183: $destination .= 'source=login';
184: }
185:
186: my $brcrum = [{'href' => '',
187: 'text' => 'Successful Login'},];
188: my $args = {'no_inline_link' => 1,
189: 'bread_crumbs' => $brcrum,};
190: if (($env{'request.deeplink.login'} eq $lowerurl) &&
191: (($env{'request.linkprot'}) || ($env{'request.linkkey'} ne ''))) {
192: my %info;
193: if ($env{'request.linkprot'}) {
194: $info{'linkprot'} = $env{'request.linkprot'};
195: foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
196: if ($form->{$item}) {
197: $info{$item} = $form->{$item};
198: }
199: }
200: $args = {'only_body' => 1,};
201: } elsif ($env{'request.linkkey'} ne '') {
202: $info{'linkkey'} = $env{'request.linkkey'};
203: }
204: $info{'origurl'} = $lowerurl;
205: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
206: unless (($token eq 'con_lost') || ($token eq 'refused') ||
207: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
208: $destination .= (($destination =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
209: }
210: }
211: if (($env{'request.deeplink.login'}) || ($env{'request.lti.login'})) {
212: if ($env{'environment.remote'} eq 'on') {
213: &Apache::lonnet::appenv({'environment.remote' => 'off'});
214: }
215: }
216: my $startupremote;
217: if ($write_to_opener) {
218: if ($env{'environment.remote'} eq 'on') {
219: &Apache::lonnet::appenv({'environment.remote' => 'off'});
220: }
221: $args->{'redirect'} = [0,$destination,'',$write_to_opener];
222: } else {
223: $startupremote=&Apache::lonmenu::startupremote($destination);
224: }
225:
226: my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
227: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
228: my $setflags=&Apache::lonmenu::setflags();
229: my $maincall=&Apache::lonmenu::maincall();
230: my $start_page=&Apache::loncommon::start_page('Successful Login',
231: $startupremote,$args);
232: my $end_page =&Apache::loncommon::end_page();
233:
234: my $continuelink;
235: if ($env{'environment.remote'} eq 'off') {
236: unless ($write_to_opener) {
237: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
238: }
239: }
240: # ------------------------------------------------- Output for successful login
241:
242: &Apache::loncommon::content_type($r,'text/html');
243: if ($securecookie) {
244: $r->headers_out->add('Set-cookie' => $securecookie);
245: }
246: if ($defaultcookie) {
247: $r->headers_out->add('Set-cookie' => $defaultcookie);
248: }
249: if ($expirepub) {
250: my $c = new CGI::Cookie(-name => 'lonPubID',
251: -value => '',
252: -expires => '-10y',);
253: $r->headers_out->add('Set-cookie' => $c);
254: }
255: $r->send_http_header;
256:
257: if (($env{'request.linkprot'}) || ($env{'request.lti.login'})) {
258: $r->print(<<END);
259: $start_page
260: <br />$continuelink
261: $end_page
262: END
263: } else {
264: my %lt=&Apache::lonlocal::texthash(
265: 'wel' => 'Welcome',
266: 'pro' => 'Login problems?',
267: );
268: my $loginhelp = &loginhelpdisplay($domain);
269: if ($loginhelp) {
270: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
271: }
272:
273: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
274: $r->print(<<ENDSUCCESS);
275: $start_page
276: $setflags
277: $windowinfo
278: <h1>$lt{'wel'}</h1>
279: $welcome
280: $loginhelp
281: $remoteinfo
282: $maincall
283: $continuelink
284: $end_page
285: ENDSUCCESS
286: }
287: return;
288: }
289:
290: # --------------------------------------------------------------- Failed login!
291:
292: sub failed {
293: my ($r,$message,$form,$authhost) = @_;
294: (undef,undef,undef,my $clientmathml,my $clientunicode) =
295: &Apache::loncommon::decode_user_agent();
296: my $args = {};
297: if ($clientunicode && !$clientmathml) {
298: $args = {'browser.unicode' => 1};
299: }
300: if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
301: if ($form->{linkprot}) {
302: $args->{only_body} = 1;
303: }
304: }
305:
306: my @actions;
307: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
308: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
309: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
310: if (&Apache::lonnet::domain($udom,'description') eq '') {
311: undef($udom);
312: }
313: my $authtype;
314: if (($udom ne '') && ($uname ne '') && ($authhost eq 'no_host')) {
315: $authtype = &Apache::lonnet::queryauthenticate($uname,$udom);
316: }
317: my $retry = '/adm/login';
318: if (($uname eq $form->{'uname'}) && ($authtype !~ /^lti:/)) {
319: $retry .= '?username='.$uname;
320: }
321: if ($udom) {
322: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
323: }
324: my $lonhost = $r->dir_config('lonHostID');
325: my $querystr;
326: my $result = &set_retry_token($form,$lonhost,\$querystr);
327: if ($result eq 'fail') {
328: if (exists($form->{role})) {
329: my $role = &Apache::loncommon::cleanup_html($form->{role});
330: if ($role ne '') {
331: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
332: }
333: }
334: if (exists($form->{symb})) {
335: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
336: if ($symb ne '') {
337: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
338: }
339: }
340: if (exists($form->{firsturl})) {
341: my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl});
342: if ($firsturl ne '') {
343: $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl;
344: if ($form->{firsturl} =~ m{^/tiny/$match_domain/\w+$}) {
345: unless (exists($form->{linkprot})) {
346: if (exists($form->{linkkey})) {
347: $retry .= 'linkkey='.$form->{linkkey};
348: }
349: }
350: }
351: }
352: }
353: if (exists($form->{linkprot})) {
354: my %info = (
355: 'linkprot' => $form->{'linkprot'},
356: );
357: foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
358: if ($form->{$item} ne '') {
359: $info{$item} = $form->{$item};
360: }
361: }
362: my $ltoken = &Apache::lonnet::tmpput(\%info,
363: $r->dir_config('lonHostID'),'retry');
364: if ($ltoken) {
365: $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken;
366: }
367: }
368: } elsif ($querystr ne '') {
369: $retry .= (($retry=~/\?/)?'&':'?').$querystr;
370: }
371: my $end_page = &Apache::loncommon::end_page();
372: &Apache::loncommon::content_type($r,'text/html');
373: $r->send_http_header;
374: if ($authtype =~ /^lti:/) {
375: $message = &mt('Direct login is not supported with the username you entered.').
376: '<br /><br />'.
377: &mt('You likely need to launch LON-CAPA from within a course in a different Learning Management System.').
378: '<br />'.
379: &mt('You can also try to log in with a different username.');
380: @actions =
381: (&mt('Try your [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
382: } else {
383: $message = &mt($message);
384: @actions =
385: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
386: }
387: my $loginhelp = &loginhelpdisplay($udom);
388: if ($loginhelp) {
389: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
390: }
391: #FIXME: link to helpdesk might be added here
392: $r->print(
393: $start_page
394: .'<h2>'.&mt('Sorry ...').'</h2>'
395: .&Apache::lonhtmlcommon::confirm_success($message,1).'<br /><br />'
396: .&Apache::lonhtmlcommon::actionbox(\@actions)
397: .$end_page
398: );
399: }
400:
401: # ------------------------------------------------------------------ Rerouting!
402:
403: sub reroute {
404: my ($r) = @_;
405: &Apache::loncommon::content_type($r,'text/html');
406: $r->send_http_header;
407: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
408: .&mt('Please [_1]log in again[_2].');
409: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
410: }
411:
412: # ---------------------------------------------------------------- Main handler
413:
414: sub handler {
415: my $r = shift;
416: my $londocroot = $r->dir_config('lonDocRoot');
417: # Are we re-routing?
418: if (-e "$londocroot/lon-status/reroute.txt") {
419: &reroute($r);
420: return OK;
421: }
422:
423: &Apache::lonlocal::get_language_handle($r);
424:
425: # -------------------------------- Prevent users from attempting to login twice
426: my $handle = &Apache::lonnet::check_for_valid_session($r);
427: if ($handle ne '') {
428: my $lonidsdir=$r->dir_config('lonIDsDir');
429: if ($handle=~/^publicuser\_/) {
430: # For "public user" - remove it, we apparently really want to login
431: unlink($r->dir_config('lonIDsDir')."/$handle.id");
432: } else {
433: # Indeed, a valid token is found
434: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
435: &Apache::loncommon::content_type($r,'text/html');
436: $r->send_http_header;
437: my $start_page =
438: &Apache::loncommon::start_page('Already logged in');
439: my $end_page =
440: &Apache::loncommon::end_page();
441: my $dest = '/adm/roles';
442: my %form = &get_form_items($r);
443: if ($form{'logtoken'}) {
444: my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
445: $form{'serverid'});
446: unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
447: ($tmpinfo eq 'no_such_host')) {
448: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
449: $firsturl = &unescape($firsturl);
450: my %info;
451: foreach my $item (@rest) {
452: my ($key,$value) = split(/=/,$item);
453: $info{$key} = &unescape($value);
454: }
455: if ($firsturl ne '') {
456: $info{'firsturl'} = $firsturl;
457: $dest = $firsturl;
458: my $relogin;
459: if ($dest =~ m{^/tiny/$match_domain/\w+$}) {
460: if ($env{'request.course.id'}) {
461: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
462: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
463: my $symb = &Apache::loncommon::symb_from_tinyurl($dest,$cnum,$cdom);
464: if ($symb) {
465: unless (&set_deeplink_login(%info) eq 'ok') {
466: $relogin = 1;
467: }
468: }
469: }
470: if ($relogin) {
471: $r->print(
472: $start_page
473: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
474: .'<p>'.&mt('Please [_1]log out[_2] first, and then try your access again',
475: '<a href="/adm/logout">','</a>')
476: .'</p>'
477: .$end_page);
478: } else {
479: if (($info{'linkprot'}) || ($info{'linkkey'} ne '')) {
480: if (($info{'linkprot'}) && ($info{'linkprotuser'} ne '')) {
481: unless ($info{'linkprotuser'} eq $env{'user.name'}.':'.$env{'user.domain'}) {
482: $r->print(
483: $start_page
484: .'<p class="LC_warning">'.&mt('You are already logged in, but as a different user from the one expected for the link you followed from another system').'</p>'
485: .'<p>'.&mt('Please [_1]log out[_2] first, and then try following the link again from the other system',
486: '<a href="/adm/logout">','</a>')
487:
488: .'</p>'
489: .$end_page);
490: return OK;
491: }
492: }
493: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'link');
494: unless (($token eq 'con_lost') || ($token eq 'refused') ||
495: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
496: $dest .= (($dest =~ /\?/) ? '&' : '?') . 'ttoken='.$token;
497: }
498: }
499: $r->print(
500: $start_page
501: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
502: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4] first, and then try your access again',
503: '<a href="'.$dest.'">','</a>',
504: '<a href="/adm/logout">','</a>')
505: .'</p>'
506: .$end_page);
507: }
508: return OK;
509: }
510: }
511: }
512: }
513: $r->print(
514: $start_page
515: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
516: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
517: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
518: .'</p>'
519: .$end_page
520: );
521: return OK;
522: }
523: }
524:
525: # ---------------------------------------------------- No valid token, continue
526:
527: my %form = &get_form_items($r);
528: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
529: &failed($r,'Username, password and domain need to be specified.',
530: \%form);
531: return OK;
532: }
533:
534: # split user logging in and "su"-user
535:
536: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
537: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
538: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
539: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
540: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
541:
542: my $role = $r->dir_config('lonRole');
543: my $domain = $r->dir_config('lonDefDomain');
544: my $prodir = $r->dir_config('lonUsersDir');
545: my $contact_name = &mt('LON-CAPA helpdesk');
546:
547: # ---------------------------------------- Get the information from login token
548:
549: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
550: $form{'serverid'});
551:
552: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
553: ($tmpinfo eq 'no_such_host')) {
554: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
555: return OK;
556: } else {
557: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
558: $form{'serverid'});
559: if ( $reply ne 'ok' ) {
560: &failed($r,'Session could not be opened.',\%form);
561: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
562: return OK;
563: }
564: }
565:
566: if (!&Apache::lonnet::domain($form{'udom'})) {
567: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
568: return OK;
569: }
570:
571: my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo);
572: $firsturl = &unescape($firsturl);
573: foreach my $item (@rest) {
574: my ($key,$value) = split(/=/,$item);
575: $form{$key} = &unescape($value);
576: }
577: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
578: $form{'firsturl'} = $firsturl;
579: }
580: my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'});
581:
582: # ---------------------------------------------------------------- Authenticate
583:
584: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
585: my ($cancreate,$statustocreate) =
586: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
587: my $defaultauth;
588: if (ref($cancreate) eq 'ARRAY') {
589: if (grep(/^login$/,@{$cancreate})) {
590: $defaultauth = 1;
591: }
592: }
593: my $clientcancheckhost = 1;
594: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
595: $form{'udom'},$defaultauth,
596: $clientcancheckhost);
597:
598: # --------------------------------------------------------------------- Failed?
599:
600: if ($authhost eq 'no_host') {
601: my $pwdverify;
602: if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') {
603: my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'});
604: if (keys(%possunames) > 0) {
605: foreach my $rulematch (keys(%possunames)) {
606: my $possuname = $possunames{$rulematch};
607: if (($possuname ne '') && ($possuname =~ /^$match_username$/)) {
608: $authhost=Apache::lonnet::authenticate($possuname,$upass,
609: $form{'udom'},undef,
610: $clientcancheckhost);
611: if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) {
612: next;
613: } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) {
614: $pwdverify = 1;
615: &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}");
616: $form{'uname'} = $possuname;
617: last;
618: }
619: }
620: }
621: }
622: }
623: unless ($pwdverify) {
624: &failed($r,'Username and/or password could not be authenticated.',
625: \%form,$authhost);
626: return OK;
627: }
628: } elsif ($authhost eq 'no_account_on_host') {
629: if ($defaultauth) {
630: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
631: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
632: return OK;
633: }
634: my $start_page =
635: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
636: '',{'no_inline_link' => 1,});
637: my $lonhost = $r->dir_config('lonHostID');
638: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
639: my $contacts =
640: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
641: $form{'udom'},$origmail);
642: my ($contact_email) = split(',',$contacts);
643: my $output =
644: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
645: $domdesc,'',$lonhost,
646: $contact_email,$contact_name,
647: undef,$statustocreate);
648: &Apache::loncommon::content_type($r,'text/html');
649: $r->send_http_header;
650: &Apache::createaccount::print_header($r,$start_page);
651: $r->print('<h3>'.&mt('Account creation').'</h3>'.
652: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
653: $output.&Apache::loncommon::end_page());
654: return OK;
655: } else {
656: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
657: return OK;
658: }
659: }
660:
661: if (($firsturl eq '') ||
662: ($firsturl=~/^\/adm\/(logout|remote)/)) {
663: $firsturl='/adm/roles';
664: }
665:
666: my ($hosthere,%sessiondata);
667: if ($form{'iptoken'}) {
668: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
669: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
670: if (($sessiondata{'domain'} eq $form{'udom'}) &&
671: ($sessiondata{'username'} eq $form{'uname'})) {
672: $hosthere = 1;
673: }
674: }
675:
676: # --------------------------------- Are we attempting to login as somebody else?
677: if ($form{'suname'}) {
678: my ($suname,$sudom,$sudomref);
679: $suname = $form{'suname'};
680: $sudom = $form{'udom'};
681: if ($form{'sudom'}) {
682: unless ($sudom eq $form{'sudom'}) {
683: if (&Apache::lonnet::domain($form{'sudom'})) {
684: $sudomref = [$form{'sudom'}];
685: $sudom = $form{'sudom'};
686: }
687: }
688: }
689: # ------------ see if the original user has enough privileges to pull this stunt
690: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
691: # ---------------------------------------------------- see if the su-user exists
692: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
693: # ------------------------------ see if the su-user is not too highly privileged
694: if (&Apache::lonnet::privileged($suname,$sudom)) {
695: &Apache::lonnet::logthis('Attempted switch user to privileged user');
696: } else {
697: my $noprivswitch;
698: #
699: # su-user's home server and user's home server must have one of:
700: # (a) same domain
701: # (b) same primary library server for the two domains
702: # (c) same "internet domain" for primary library server(s) for home servers' domains
703: #
704: my $suprim = &Apache::lonnet::domain($sudom,'primary');
705: my $suintdom = &Apache::lonnet::internet_dom($suprim);
706: unless ($sudom eq $form{'udom'}) {
707: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
708: my $uintdom = &Apache::lonnet::internet_dom($uprim);
709: unless ($suprim eq $uprim) {
710: unless ($suintdom eq $uintdom) {
711: &Apache::lonnet::logthis('Attempted switch user '
712: .'to user with different "internet domain".');
713: $noprivswitch = 1;
714: }
715: }
716: }
717:
718: unless ($noprivswitch) {
719: #
720: # server where log-in occurs must have same "internet domain" as su-user's home
721: # server
722: #
723: my $lonhost = $r->dir_config('lonHostID');
724: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
725: if ($hostintdom ne $suintdom) {
726: &Apache::lonnet::logthis('Attempted switch user on a '
727: .'server with a different "internet domain".');
728: } else {
729:
730: # -------------------------------------------------------- actually switch users
731:
732: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
733: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
734: $form{'uname'}=$suname;
735: if ($form{'udom'} ne $sudom) {
736: $form{'udom'}=$sudom;
737: }
738: }
739: }
740: }
741: }
742: } else {
743: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
744: }
745: }
746:
747: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
748: if (($form{'linkprot'}) && ($form{'linkprotuser'} ne '')) {
749: unless($form{'linkprotuser'} eq $form{'uname'}.':'.$form{'udom'}) {
750: delete($form{'udom'});
751: delete($form{'uname'});
752: &failed($r,'Username and/or domain are different to that expected for the link you followed from another system',
753: \%form,$authhost);
754: return OK;
755: }
756: }
757: }
758:
759: my ($is_balancer,$otherserver);
760:
761: unless ($hosthere) {
762: ($is_balancer,$otherserver) =
763: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
764: if ($is_balancer) {
765: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
766: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
767: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
768: $otherserver = $found_server;
769: }
770: if ($otherserver eq '') {
771: my $lowest_load;
772: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
773: if ($lowest_load > 100) {
774: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'});
775: }
776: }
777: if ($otherserver ne '') {
778: my @hosts = &Apache::lonnet::current_machine_ids();
779: if (grep(/^\Q$otherserver\E$/,@hosts)) {
780: $hosthere = $otherserver;
781: }
782: }
783: }
784: }
785:
786: if (($is_balancer) && (!$hosthere)) {
787: if ($otherserver) {
788: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
789: \%form);
790: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
791: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
792: $switchto .= '&origurl='.$firsturl;
793: }
794: if ($form{'role'}) {
795: $switchto .= '&role='.$form{'role'};
796: }
797: if ($form{'symb'}) {
798: $switchto .= '&symb='.$form{'symb'};
799: }
800: if ($form{'linkprot'}) {
801: $env{'request.linkprot'} = $form{'linkprot'};
802: foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
803: if ($form{$item}) {
804: $env{'request.'.$item} = $form{$item};
805: }
806: }
807: } elsif ($form{'linkkey'} ne '') {
808: $env{'request.linkkey'} = $form{'linkkey'};
809: }
810: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
811: &set_deeplink_login(%form);
812: } elsif ($firsturl eq '/adm/email') {
813: if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) {
814: $env{'request.display'} = $form{'display'};
815: $env{'request.mailrecip'} = $form{'mailrecip'};
816: }
817: }
818: $r->internal_redirect($switchto);
819: } else {
820: &Apache::loncommon::content_type($r,'text/html');
821: $r->send_http_header;
822: $r->print(&noswitch());
823: }
824: return OK;
825: } else {
826: if (!&check_can_host($r,\%form,$authhost)) {
827: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
828: if ($otherserver) {
829: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
830: \%form);
831: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
832: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
833: $switchto .= '&origurl='.$firsturl;
834: }
835: if ($form{'role'}) {
836: $switchto .= '&role='.$form{'role'};
837: }
838: if ($form{'symb'}) {
839: $switchto .= '&symb='.$form{'symb'};
840: }
841: if ($form{'linkprot'}) {
842: $env{'request.linkprot'} = $form{'linkprot'};
843: foreach my $item ('linkprotuser','linkprotexit','linkprotpbid','linkprotpburl') {
844: if ($form{$item}) {
845: $env{'request.'.$item} = $form{$item};
846: }
847: }
848: } elsif ($form{'linkkey'} ne '') {
849: $env{'request.linkkey'} = $form{'linkkey'};
850: }
851: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
852: &set_deeplink_login(%form);
853: } elsif ($firsturl eq '/adm/email') {
854: if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) {
855: $env{'request.display'} = $form{'display'};
856: $env{'request.mailrecip'} = $form{'mailrecip'};
857: }
858: }
859: $r->internal_redirect($switchto);
860: } else {
861: &Apache::loncommon::content_type($r,'text/html');
862: $r->send_http_header;
863: $r->print(&noswitch());
864: }
865: return OK;
866: }
867:
868: # ------------------------------------------------------- Do the load balancing
869:
870: # ---------------------------------------------------------- Determine own load
871: my $loadlim = $r->dir_config('lonLoadLim');
872: my $loadavg;
873: {
874: my $loadfile=Apache::File->new('/proc/loadavg');
875: $loadavg=<$loadfile>;
876: }
877: $loadavg =~ s/\s.*//g;
878: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
879: my $userloadpercent=&Apache::lonnet::userload();
880:
881: # ---------------------------------------------------------- Are we overloaded?
882: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
883: my $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$userloadpercent,1,$form{'udom'});
884: if (!$unloaded) {
885: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
886: }
887: if ($unloaded) {
888: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
889: undef,\%form);
890: if ($form{'linkprot'}) {
891: $env{'request.linkprot'} = $form{'linkprot'};
892: } elsif ($form{'linkkey'} ne '') {
893: $env{'request.linkkey'} = $form{'linkkey'};
894: }
895: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
896: &set_deeplink_login(%form);
897: } elsif ($firsturl eq '/adm/email') {
898: if ($form{'display'} && ($form{'mailrecip'} eq "$form{'uname'}:$form{'udom'}")) {
899: $env{'request.display'} = $form{'display'};
900: $env{'request.mailrecip'} = $form{'mailrecip'};
901: }
902: }
903: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
904: return OK;
905: }
906: }
907: if (($is_balancer) && ($hosthere)) {
908: $form{'noloadbalance'} = $hosthere;
909: }
910: my $extra_env;
911: if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) {
912: if ($sessiondata{'origurl'} ne '') {
913: $firsturl = $sessiondata{'origurl'};
914: $form{'firsturl'} = $sessiondata{'origurl'};
915: my @names = ('role','symb','linkprot','linkkey');
916: foreach my $item (@names) {
917: if ($sessiondata{$item} ne '') {
918: $form{$item} = $sessiondata{$item};
919: }
920: }
921: if ($sessiondata{'origurl'} eq '/adm/email') {
922: if (($sessiondata{'display'}) && ($sessiondata{'mailrecip'})) {
923: if (&unescape($sessiondata{'mailrecip'}) eq "$form{'uname'}:$form{'udom'}") {
924: $form{'display'} = &unescape($sessiondata{'display'});
925: $form{'mailrecip'} = &unescape($sessiondata{'mailrecip'});
926: }
927: }
928: }
929: }
930: }
931: if ($form{'linkprot'}) {
932: my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2);
933: if ($linkprotector) {
934: $extra_env = {'user.linkprotector' => $linkprotector,
935: 'user.linkproturi' => $uri};
936: }
937: } elsif ($form{'linkkey'} ne '') {
938: $extra_env = {'user.deeplinkkey' => $form{'linkkey'},
939: 'user.keyedlinkuri' => $form{'firsturl'}};
940: }
941: if ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
942: &set_deeplink_login(%form);
943: if ($form{'linkprot'}) {
944: if (ref($extra_env) eq 'HASH') {
945: %{$extra_env} = ( %{$extra_env}, 'request.linkprot' => $form{'linkprot'} );
946: } else {
947: $extra_env = {'request.linkprot' => $form{'linkprot'}};
948: }
949: if ($form{'linkprotexit'}) {
950: $extra_env->{'request.linkprotexit'} = $form{'linkprotexit'};
951: }
952: if ($form{'linkprotpbid'}) {
953: $extra_env->{'request.linkprotpbid'} = $form{'linkprotpbid'};
954: }
955: if ($form{'linkprotpburl'}) {
956: $extra_env->{'request.linkprotpburl'} = $form{'linkprotpburl'};
957: }
958: } elsif ($form{'linkkey'} ne '') {
959: if (ref($extra_env) eq 'HASH') {
960: %{$extra_env} = ( %{$extra_env}, 'request.linkkey' => $form{'linkkey'} );
961: } else {
962: $extra_env = {'request.linkkey' => $form{'linkkey'}};
963: }
964: }
965: if ($env{'request.deeplink.login'}) {
966: if (ref($extra_env) eq 'HASH') {
967: %{$extra_env} = ( %{$extra_env}, 'request.deeplink.login' => $form{'firsturl'} );
968: } else {
969: $extra_env = {'request.deeplink.login' => $form{'firsturl'}};
970: }
971: }
972: }
973: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env,
974: \%form);
975: return OK;
976: }
977: }
978:
979: sub get_form_items {
980: my ($r) = @_;
981: my $buffer;
982: if ($r->header_in('Content-length') > 0) {
983: $r->read($buffer,$r->header_in('Content-length'),0);
984: }
985: my %form;
986: foreach my $pair (split(/&/,$buffer)) {
987: my ($name,$value) = split(/=/,$pair);
988: $value =~ tr/+/ /;
989: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
990: $form{$name}=$value;
991: }
992: return %form;
993: }
994:
995: sub set_deeplink_login {
996: my (%form) = @_;
997: my $disallow;
998: if ($form{'firsturl'} =~ m{^/tiny/($match_domain)/\w+$}) {
999: my $cdom = $1;
1000: my ($cnum,$symb) = &Apache::loncommon::symb_from_tinyurl($form{'firsturl'},'',$cdom);
1001: if ($symb) {
1002: if ($env{'request.course.id'} eq $cdom.'_'.$cnum) {
1003: my $deeplink;
1004: if ($symb =~ /\.(page|sequence)$/) {
1005: my $mapname = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($symb))[2]);
1006: my $navmap = Apache::lonnavmaps::navmap->new();
1007: if (ref($navmap)) {
1008: $deeplink = $navmap->get_mapparam(undef,$mapname,'0.deeplink');
1009: }
1010: } else {
1011: $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$symb);
1012: }
1013: if ($deeplink ne '') {
1014: my ($state,$others,$listed,$scope,$protect) = split(/,/,$deeplink);
1015: if (($protect ne 'none') && ($protect ne '')) {
1016: my ($acctype,$item) = split(/:/,$protect);
1017: if ($acctype =~ /lti(c|d)$/) {
1018: unless ($form{'linkprot'} eq $item.$1.':'.$env{'request.deeplink.login'}) {
1019: $disallow = 1;
1020: }
1021: } elsif ($acctype eq 'key') {
1022: unless ($form{'linkkey'} eq $item) {
1023: $disallow = 1;
1024: }
1025: }
1026: }
1027: }
1028: unless ($disallow) {
1029: $env{'request.deeplink.login'} = $form{'firsturl'};
1030: }
1031: } else {
1032: $env{'request.deeplink.login'} = $form{'firsturl'};
1033: }
1034: }
1035: }
1036: if ($disallow) {
1037: return;
1038: }
1039: return 'ok';
1040: }
1041:
1042: sub set_retry_token {
1043: my ($form,$lonhost,$querystr) = @_;
1044: if (ref($form) eq 'HASH') {
1045: my ($firsturl,$token,$extras,@names);
1046: @names = ('role','symb','linkprotuser','linkprotexit','linkprot','linkkey','iptoken','linkprotpbid','linkprotpburl');
1047: foreach my $name (@names) {
1048: if ($form->{$name} ne '') {
1049: $extras .= '&'.$name.'='.&escape($form->{$name});
1050: last if ($name eq 'linkprot');
1051: }
1052: }
1053: my $firsturl = $form->{'firsturl'};
1054: if (($firsturl ne '') || ($extras ne '')) {
1055: $extras .= ':retry';
1056: $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl).
1057: $extras,$lonhost);
1058: if (($token eq 'con_lost') || ($token eq 'no_such_host')) {
1059: return 'fail';
1060: } else {
1061: if (ref($querystr)) {
1062: $$querystr = 'retry='.$token;
1063: }
1064: return 'ok';
1065: }
1066: }
1067: }
1068: return;
1069: }
1070:
1071: sub check_can_host {
1072: my ($r,$form,$authhost,$domdesc) = @_;
1073: return unless (ref($form) eq 'HASH');
1074: my $canhost = 1;
1075: my $lonhost = $r->dir_config('lonHostID');
1076: my $udom = $form->{'udom'};
1077: my @intdoms;
1078: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
1079: if (ref($internet_names) eq 'ARRAY') {
1080: @intdoms = @{$internet_names};
1081: }
1082: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
1083: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1084: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
1085: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
1086: my $hostname = &Apache::lonnet::hostname($lonhost);
1087: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
1088: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
1089: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1090: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
1091: my $loncaparev;
1092: if ($authhost eq 'no_account_on_host') {
1093: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1094: } else {
1095: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1096: }
1097: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
1098: $udomdefaults{'remotesessions'},
1099: $defdomdefaults{'hostedsessions'});
1100: }
1101: unless ($canhost) {
1102: if ($authhost eq 'no_account_on_host') {
1103: my $checkloginvia = 1;
1104: my ($login_host,$hostname) =
1105: &Apache::lonnet::choose_server($udom,$checkloginvia);
1106: &Apache::loncommon::content_type($r,'text/html');
1107: $r->send_http_header;
1108: if ($login_host ne '') {
1109: my $protocol = $Apache::lonnet::protocol{$login_host};
1110: $protocol = 'http' if ($protocol ne 'https');
1111: my $alias = &Apache::lonnet::use_proxy_alias($r,$login_host);
1112: $hostname = $alias if ($alias ne '');
1113: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
1114: #FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host
1115: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
1116: '<h3>'.&mt('Account creation').'</h3>'.
1117: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1118: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
1119: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
1120: &Apache::loncommon::end_page());
1121: } else {
1122: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1123: '<h3>'.&mt('Account creation unavailable').'</h3>'.
1124: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
1125: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
1126: &Apache::loncommon::end_page());
1127: }
1128: } else {
1129: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
1130: $form);
1131: if ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) {
1132: $env{'request.deeplink.login'} = $form->{'firsturl'};
1133: } elsif ($form->{'firsturl'} eq '/adm/email') {
1134: if ($form->{'display'} && ($form->{'mailrecip'} eq $form->{'uname'}.':'.$form->{'udom'})) {
1135: $env{'request.display'} = $form->{'mailrecip'};
1136: $env{'request.mailrecip'} = $form->{'mailrecip'};
1137: }
1138: }
1139: if ($form->{'linkprot'}) {
1140: $env{'request.linkprot'} = $form->{'linkprot'};
1141: } elsif ($form->{'linkkey'} ne '') {
1142: $env{'request.linkkey'} = $form->{'linkkey'};
1143: }
1144: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1145: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
1146: }
1147: }
1148: return $canhost;
1149: }
1150:
1151: sub noswitch {
1152: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
1153: '<h3>'.&mt('Session unavailable').'</h3>'.
1154: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
1155: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
1156: &Apache::loncommon::end_page();
1157: return $result;
1158: }
1159:
1160: sub loginhelpdisplay {
1161: my ($authdomain) = @_;
1162: my $login_help = 1;
1163: my $lang = &Apache::lonlocal::current_language();
1164: if ($login_help) {
1165: my $dom = $authdomain;
1166: if ($dom eq '') {
1167: $dom = &Apache::lonnet::default_login_domain();
1168: }
1169: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
1170: my $loginhelp_url;
1171: if ($lang) {
1172: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
1173: if ($loginhelp_url ne '') {
1174: return $loginhelp_url;
1175: }
1176: }
1177: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
1178: if ($loginhelp_url ne '') {
1179: return $loginhelp_url;
1180: } else {
1181: return '/adm/loginproblems.html';
1182: }
1183: }
1184: return;
1185: }
1186:
1187: sub alternate_unames_check {
1188: my ($uname,$udom) = @_;
1189: my %possunames;
1190: my %domdefs = &Apache::lonnet::get_domain_defaults($udom);
1191: if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') {
1192: if (@{$domdefs{'unamemap_rule'}} > 0) {
1193: %possunames =
1194: &Apache::lonnet::inst_rulecheck($udom,$uname,undef,
1195: 'unamemap',$domdefs{'unamemap_rule'});
1196: }
1197: }
1198: return %possunames;
1199: }
1200:
1201: 1;
1202: __END__
1203:
1204:
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