Annotation of loncom/auth/lonauth.pm, revision 1.139
1.136 kruse 1: # The LearningOnline Network
2: # User Authentication Module
3: #
1.139 ! raeburn 4: # $Id: lonauth.pm,v 1.138 2015/03/06 21:56:41 raeburn Exp $
1.136 kruse 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;
33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use DynaLoader; # for Crypt::DES version
36: use Crypt::DES;
37: use Apache::loncommon();
38: use Apache::lonnet;
39: use Apache::lonmenu();
40: use Apache::createaccount;
41: use Fcntl qw(:flock);
42: use Apache::lonlocal;
43: use Apache::File();
44: use HTML::Entities;
45:
46: # ------------------------------------------------------------ Successful login
47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
49: $form) = @_;
50:
51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
55: {'extra_env' => $extra_env,});
56:
57: my $public=($username eq 'public' && $domain eq 'public');
58:
59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
60:
61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
65:
66: # ------------------------------------------------- Check for critical messages
67:
68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
69: if ($what[0]) {
70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
71: $lowerurl='/adm/email?critical=display';
72: }
73: }
74:
75: # ------------------------------------------------------------ Get cookie ready
76: $cookie="lonID=$cookie; path=/";
77: # -------------------------------------------------------- Menu script and info
78: my $destination = $lowerurl;
79:
80: if (defined($form->{role})) {
81: my $envkey = 'user.role.'.$form->{role};
82: my $now=time;
83: my $then=$env{'user.login.time'};
84: my $refresh=$env{'user.refresh.time'};
85: my $update=$env{'user.update.time'};
86: if (!$update) {
87: $update = $then;
88: }
89: if (exists($env{$envkey})) {
90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
92: \$trolecode,\$tstatus,\$tstart,\$tend);
93: if ($tstatus eq 'is') {
94: $destination .= ($destination =~ /\?/) ? '&' : '?';
95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
96: $destination .= 'selectrole=1&'.$newrole.'=1';
97: }
98: }
99: }
100: if (defined($form->{symb})) {
101: my $destsymb = $form->{symb};
102: $destination .= ($destination =~ /\?/) ? '&' : '?';
103: if ($destsymb =~ /___/) {
104: # FIXME Need to deal with encrypted symbs and urls as needed.
105: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.137 raeburn 106: $desturl = &Apache::lonnet::clutter($desturl);
1.136 kruse 107: $desturl = &HTML::Entities::encode($desturl,'"<>&');
108: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
109: $destination .= 'destinationurl='.$desturl.
110: '&destsymb='.$destsymb;
111: } else {
112: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
113: $destination .= 'destinationurl='.$destsymb;
114: }
115: }
116: if ($destination =~ m{^/adm/roles}) {
117: $destination .= ($destination =~ /\?/) ? '&' : '?';
118: $destination .= 'source=login';
119: }
120:
121: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
122: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
123: my $brcrum = [{'href' => '',
124: 'text' => 'Successful Login'},];
125: my $start_page=&Apache::loncommon::start_page('Successful Login',
126: $header,
127: {'bread_crumbs' => $brcrum,});
128: my $end_page =&Apache::loncommon::end_page();
129:
130: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
131: # ------------------------------------------------- Output for successful login
132:
133: &Apache::loncommon::content_type($r,'text/html');
134: $r->header_out('Set-cookie' => $cookie);
135: $r->send_http_header;
136:
137: my %lt=&Apache::lonlocal::texthash(
138: 'wel' => 'Welcome',
139: 'pro' => 'Login problems?',
140: );
141: my $loginhelp = &loginhelpdisplay($domain);
142: if ($loginhelp) {
143: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
144: }
145:
146: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
147: $r->print(<<ENDSUCCESS);
148: $start_page
149: $windowinfo
150: <h1>$lt{'wel'}</h1>
151: $welcome
152: $loginhelp
153: $continuelink
154: $end_page
155: ENDSUCCESS
156: return;
157: }
158:
159: # --------------------------------------------------------------- Failed login!
160:
161: sub failed {
162: my ($r,$message,$form) = @_;
163: (undef,undef,undef,my $clientmathml,my $clientunicode) =
164: &Apache::loncommon::decode_user_agent();
165: my $args = {};
166: if ($clientunicode && !$clientmathml) {
167: $args = {'browser.unicode' => 1};
168: }
169:
170: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
171: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
172: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
173: if (&Apache::lonnet::domain($udom,'description') eq '') {
174: undef($udom);
175: }
176: my $retry = '/adm/login';
177: if ($uname eq $form->{'uname'}) {
178: $retry .= '?username='.$uname;
179: }
180: if ($udom) {
181: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
182: }
183: if (exists($form->{role})) {
184: my $role = &Apache::loncommon::cleanup_html($form->{role});
185: if ($role ne '') {
186: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
187: }
188: }
189: if (exists($form->{symb})) {
190: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
191: if ($symb ne '') {
192: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
193: }
194: }
195: my $end_page = &Apache::loncommon::end_page();
196: &Apache::loncommon::content_type($r,'text/html');
197: $r->send_http_header;
198: my @actions =
199: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
200: my $loginhelp = &loginhelpdisplay($udom);
201: if ($loginhelp) {
202: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
203: }
204: #FIXME: link to helpdesk might be added here
205:
206: $r->print(
207: $start_page
208: .'<h2>'.&mt('Sorry ...').'</h2>'
209: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
210: .&Apache::lonhtmlcommon::actionbox(\@actions)
211: .$end_page
212: );
213: }
214:
215: # ------------------------------------------------------------------ Rerouting!
216:
217: sub reroute {
218: my ($r) = @_;
219: &Apache::loncommon::content_type($r,'text/html');
220: $r->send_http_header;
221: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
222: .&mt('Please [_1]log in again[_2].');
223: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
224: }
225:
226: # ---------------------------------------------------------------- Main handler
227:
228: sub handler {
229: my $r = shift;
230: my $londocroot = $r->dir_config('lonDocRoot');
231: my $form;
232: # Are we re-routing?
233: if (-e "$londocroot/lon-status/reroute.txt") {
234: &reroute($r);
235: return OK;
236: }
237:
238: &Apache::lonlocal::get_language_handle($r);
239:
240: # -------------------------------- Prevent users from attempting to login twice
241: my $handle = &Apache::lonnet::check_for_valid_session($r);
242: if ($handle ne '') {
243: my $lonidsdir=$r->dir_config('lonIDsDir');
244: if ($handle=~/^publicuser\_/) {
245: # For "public user" - remove it, we apparently really want to login
246: unlink($r->dir_config('lonIDsDir')."/$handle.id");
247: } else {
248: # Indeed, a valid token is found
249: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
250: &Apache::loncommon::content_type($r,'text/html');
251: $r->send_http_header;
252: my $start_page =
253: &Apache::loncommon::start_page('Already logged in');
254: my $end_page =
255: &Apache::loncommon::end_page();
256: my $dest = '/adm/roles';
257: if ($env{'form.firsturl'} ne '') {
258: $dest = $env{'form.firsturl'};
259: }
260: $r->print(
261: $start_page
262: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
263: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
264: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
265: .'</p>'
266: .$end_page
267: );
268: return OK;
269: }
270: }
271:
272: # ---------------------------------------------------- No valid token, continue
273:
274:
275: my $buffer;
276: if ($r->header_in('Content-length') > 0) {
277: $r->read($buffer,$r->header_in('Content-length'),0);
278: }
279: my %form;
280: foreach my $pair (split(/&/,$buffer)) {
281: my ($name,$value) = split(/=/,$pair);
282: $value =~ tr/+/ /;
283: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
284: $form{$name}=$value;
285: }
286:
287: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
288: &failed($r,'Username, password and domain need to be specified.',
289: \%form);
290: return OK;
291: }
292:
293: # split user logging in and "su"-user
294:
295: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
296: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
297: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
298: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
299:
300: my $role = $r->dir_config('lonRole');
301: my $domain = $r->dir_config('lonDefDomain');
302: my $prodir = $r->dir_config('lonUsersDir');
303: my $contact_name = &mt('LON-CAPA helpdesk');
304:
305: # ---------------------------------------- Get the information from login token
306:
307: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
308: $form{'serverid'});
309:
310: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
311: ($tmpinfo eq 'no_such_host')) {
312: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
313: return OK;
314: } else {
315: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
316: $form{'serverid'});
317: if ( $reply ne 'ok' ) {
318: &failed($r,'Session could not be opened.',\%form);
319: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
320: return OK;
321: }
322: }
323:
324: if (!&Apache::lonnet::domain($form{'udom'})) {
325: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
326: return OK;
327: }
328:
1.138 raeburn 329: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
1.136 kruse 330: if ($rolestr) {
331: $rolestr = &unescape($rolestr);
332: }
333: if ($symbstr) {
334: $symbstr= &unescape($symbstr);
335: }
1.138 raeburn 336: if ($iptokenstr) {
337: $iptokenstr = &unescape($iptokenstr);
338: }
1.136 kruse 339: if ($rolestr =~ /^role=/) {
340: (undef,$form{'role'}) = split('=',$rolestr);
341: }
342: if ($symbstr =~ /^symb=/) {
343: (undef,$form{'symb'}) = split('=',$symbstr);
344: }
1.138 raeburn 345: if ($iptokenstr =~ /^iptoken=/) {
346: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
347: }
1.136 kruse 348:
1.139 ! raeburn 349: my $upass = $ENV{HTTPS} ? $form{'upass0'}
! 350: : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
1.136 kruse 351:
352: # ---------------------------------------------------------------- Authenticate
353:
354: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
355: my ($cancreate,$statustocreate) =
356: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
357: my $defaultauth;
358: if (ref($cancreate) eq 'ARRAY') {
359: if (grep(/^login$/,@{$cancreate})) {
360: $defaultauth = 1;
361: }
362: }
363: my $clientcancheckhost = 1;
364: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
365: $form{'udom'},$defaultauth,
366: $clientcancheckhost);
367:
368: # --------------------------------------------------------------------- Failed?
369:
370: if ($authhost eq 'no_host') {
371: &failed($r,'Username and/or password could not be authenticated.',
372: \%form);
373: return OK;
374: } elsif ($authhost eq 'no_account_on_host') {
375: if ($defaultauth) {
376: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
377: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
378: return OK;
379: }
380: my $start_page =
381: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
382: my $lonhost = $r->dir_config('lonHostID');
383: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
384: my $contacts =
385: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
386: $form{'udom'},$origmail);
387: my ($contact_email) = split(',',$contacts);
388: my $output =
389: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
390: $domdesc,'',$lonhost,
391: $contact_email,$contact_name,
392: undef,$statustocreate);
393: &Apache::loncommon::content_type($r,'text/html');
394: $r->send_http_header;
395: &Apache::createaccount::print_header($r,$start_page);
396: $r->print('<h3>'.&mt('Account creation').'</h3>'.
397: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
398: $output.&Apache::loncommon::end_page());
399: return OK;
400: } else {
401: &failed($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);
402: return OK;
403: }
404: }
405:
406: if (($firsturl eq '') ||
407: ($firsturl=~/^\/adm\/(logout|remote)/)) {
408: $firsturl='/adm/roles';
409: }
410:
411: my $hosthere;
412: if ($form{'iptoken'}) {
1.138 raeburn 413: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
414: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.136 kruse 415: if (($sessiondata{'domain'} eq $form{'udom'}) &&
416: ($sessiondata{'username'} eq $form{'uname'})) {
417: $hosthere = 1;
418: }
419: }
420:
421: # --------------------------------- Are we attempting to login as somebody else?
422: if ($form{'suname'}) {
423: # ------------ see if the original user has enough privileges to pull this stunt
424: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
425: # ---------------------------------------------------- see if the su-user exists
426: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
427: eq 'no_host') {
428: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
429: # ------------------------------ see if the su-user is not too highly privileged
430: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
431: # -------------------------------------------------------- actually switch users
432: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
433: ' logging in as '.$form{'suname'});
434: $form{'uname'}=$form{'suname'};
435: } else {
436: &Apache::lonnet::logthis('Attempted switch user to privileged user');
437: }
438: }
439: } else {
440: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
441: }
442: }
443:
444: my ($is_balancer,$otherserver);
445:
446: unless ($hosthere) {
447: ($is_balancer,$otherserver) =
448: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
449: }
450:
451: if ($is_balancer) {
452: if (!$otherserver) {
453: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
454: }
455: if ($otherserver) {
456: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
457: \%form);
458: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
459: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
460: $switchto .= '&origurl='.$firsturl;
461: }
462: if ($form{'role'}) {
463: $switchto .= '&role='.$form{'role'};
464: }
465: if ($form{'symb'}) {
466: $switchto .= '&symb='.$form{'symb'};
467: }
468: $r->internal_redirect($switchto);
469: } else {
470: $r->print(&noswitch());
471: }
472: return OK;
473: } else {
474: if (!&check_can_host($r,\%form,$authhost)) {
475: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
476: if ($otherserver) {
477: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
478: \%form);
479: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
480: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
481: $switchto .= '&origurl='.$firsturl;
482: }
483: if ($form{'role'}) {
484: $switchto .= '&role='.$form{'role'};
485: }
486: if ($form{'symb'}) {
487: $switchto .= '&symb='.$form{'symb'};
488: }
489: $r->internal_redirect($switchto);
490: } else {
491: $r->print(&noswitch());
492: }
493: return OK;
494: }
495:
496: # ------------------------------------------------------- Do the load balancing
497:
498: # ---------------------------------------------------------- Determine own load
499: my $loadlim = $r->dir_config('lonLoadLim');
500: my $loadavg;
501: {
502: my $loadfile=Apache::File->new('/proc/loadavg');
503: $loadavg=<$loadfile>;
504: }
505: $loadavg =~ s/\s.*//g;
506: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
507: my $userloadpercent=&Apache::lonnet::userload();
508:
509: # ---------------------------------------------------------- Are we overloaded?
510: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
511: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
512: if (!$unloaded) {
513: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
514: }
515: if ($unloaded) {
516: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
517: undef,\%form);
518: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
519: return OK;
520: }
521: }
522: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
523: \%form);
524: return OK;
525: }
526: }
527:
528: sub check_can_host {
529: my ($r,$form,$authhost,$domdesc) = @_;
530: return unless (ref($form) eq 'HASH');
531: my $canhost = 1;
532: my $lonhost = $r->dir_config('lonHostID');
533: my $udom = $form->{'udom'};
534: my @intdoms;
535: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
536: if (ref($internet_names) eq 'ARRAY') {
537: @intdoms = @{$internet_names};
538: }
539: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
540: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
541: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
542: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
543: my $hostname = &Apache::lonnet::hostname($lonhost);
544: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
545: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
546: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
547: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
548: my $loncaparev;
549: if ($authhost eq 'no_account_on_host') {
550: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
551: } else {
552: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
553: }
554: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
555: $udomdefaults{'remotesessions'},
556: $defdomdefaults{'hostedsessions'});
557: }
558: unless ($canhost) {
559: if ($authhost eq 'no_account_on_host') {
560: my $checkloginvia = 1;
561: my ($login_host,$hostname) =
562: &Apache::lonnet::choose_server($udom,$checkloginvia);
563: &Apache::loncommon::content_type($r,'text/html');
564: $r->send_http_header;
565: if ($login_host ne '') {
566: my $protocol = $Apache::lonnet::protocol{$login_host};
567: $protocol = 'http' if ($protocol ne 'https');
568: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
569: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
570: '<h3>'.&mt('Account creation').'</h3>'.
571: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
572: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
573: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
574: &Apache::loncommon::end_page());
575: } else {
576: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
577: '<h3>'.&mt('Account creation unavailable').'</h3>'.
578: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
579: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
580: &Apache::loncommon::end_page());
581: }
582: } else {
583: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
584: $form);
585: my ($otherserver) = &Apache::lonnet::choose_server($udom);
586: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
587: }
588: }
589: return $canhost;
590: }
591:
592: sub noswitch {
593: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
594: '<h3>'.&mt('Session unavailable').'</h3>'.
595: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
596: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
597: &Apache::loncommon::end_page();
598: return $result;
599: }
600:
601: sub loginhelpdisplay {
602: my ($authdomain) = @_;
603: my $login_help = 1;
604: my $lang = &Apache::lonlocal::current_language();
605: if ($login_help) {
606: my $dom = $authdomain;
607: if ($dom eq '') {
608: $dom = &Apache::lonnet::default_login_domain();
609: }
610: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
611: my $loginhelp_url;
612: if ($lang) {
613: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
614: if ($loginhelp_url ne '') {
615: return $loginhelp_url;
616: }
617: }
618: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
619: if ($loginhelp_url ne '') {
620: return $loginhelp_url;
621: } else {
622: return '/adm/loginproblems.html';
623: }
624: }
625: return;
626: }
627:
628: 1;
629: __END__
630:
631:
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