1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.121.2.9 2014/02/26 20:46:45 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::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(/___/,$destsymb);
106: unless ($desturl=~/^(adm|editupload|public)/) {
107: $desturl = &Apache::lonnet::clutter($desturl);
108: }
109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
111: $destination .= 'destinationurl='.$desturl.
112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
115: $destination .= 'destinationurl='.$destsymb;
116: }
117: }
118: if ($destination =~ m{^/adm/roles}) {
119: $destination .= ($destination =~ /\?/) ? '&' : '?';
120: $destination .= 'source=login';
121: }
122:
123: my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
124: my $startupremote=&Apache::lonmenu::startupremote($destination);
125: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
126: my $setflags=&Apache::lonmenu::setflags();
127: my $maincall=&Apache::lonmenu::maincall();
128: my $brcrum = [{'href' => '',
129: 'text' => 'Successful Login'},];
130: my $start_page=&Apache::loncommon::start_page('Successful Login',
131: $startupremote,
132: {'no_inline_link' => 1,
133: 'bread_crumbs' => $brcrum,});
134: my $end_page =&Apache::loncommon::end_page();
135:
136: my $continuelink;
137: if ($env{'environment.remote'} eq 'off') {
138: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
139: }
140: # ------------------------------------------------- Output for successful login
141:
142: &Apache::loncommon::content_type($r,'text/html');
143: $r->header_out('Set-cookie' => $cookie);
144: $r->send_http_header;
145:
146: my %lt=&Apache::lonlocal::texthash(
147: 'wel' => 'Welcome',
148: 'pro' => 'Login problems?',
149: );
150: my $loginhelp = &loginhelpdisplay($domain);
151: if ($loginhelp) {
152: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
153: }
154:
155: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
156: $r->print(<<ENDSUCCESS);
157: $start_page
158: $setflags
159: $windowinfo
160: <h1>$lt{'wel'}</h1>
161: $welcome
162: $loginhelp
163: $remoteinfo
164: $maincall
165: $continuelink
166: $end_page
167: ENDSUCCESS
168: }
169:
170: # --------------------------------------------------------------- Failed login!
171:
172: sub failed {
173: my ($r,$message,$form) = @_;
174: (undef,undef,undef,my $clientmathml,my $clientunicode) =
175: &Apache::loncommon::decode_user_agent();
176: my $args = {};
177: if ($clientunicode && !$clientmathml) {
178: $args = {'browser.unicode' => 1};
179: }
180:
181: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
182: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
183: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
184: if (&Apache::lonnet::domain($udom,'description') eq '') {
185: undef($udom);
186: }
187: my $retry = '/adm/login';
188: if ($uname eq $form->{'uname'}) {
189: $retry .= '?username='.$uname;
190: }
191: if ($udom) {
192: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
193: }
194: if (exists($form->{role})) {
195: my $role = &Apache::loncommon::cleanup_html($form->{role});
196: if ($role ne '') {
197: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
198: }
199: }
200: if (exists($form->{symb})) {
201: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
202: if ($symb ne '') {
203: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
204: }
205: }
206: my $end_page = &Apache::loncommon::end_page();
207: &Apache::loncommon::content_type($r,'text/html');
208: $r->send_http_header;
209: my @actions =
210: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
211: my $loginhelp = &loginhelpdisplay($udom);
212: if ($loginhelp) {
213: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
214: }
215: #FIXME: link to helpdesk might be added here
216:
217: $r->print(
218: $start_page
219: .'<h2>'.&mt('Sorry ...').'</h2>'
220: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
221: .&Apache::lonhtmlcommon::actionbox(\@actions)
222: .$end_page
223: );
224: }
225:
226: # ------------------------------------------------------------------ Rerouting!
227:
228: sub reroute {
229: my ($r) = @_;
230: &Apache::loncommon::content_type($r,'text/html');
231: $r->send_http_header;
232: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
233: .&mt('Please [_1]log in again[_2].');
234: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
235: }
236:
237: # ---------------------------------------------------------------- Main handler
238:
239: sub handler {
240: my $r = shift;
241: my $londocroot = $r->dir_config('lonDocRoot');
242: my $form;
243: # Are we re-routing?
244: if (-e "$londocroot/lon-status/reroute.txt") {
245: &reroute($r);
246: return OK;
247: }
248:
249: &Apache::lonlocal::get_language_handle($r);
250:
251: # -------------------------------- Prevent users from attempting to login twice
252: my $handle = &Apache::lonnet::check_for_valid_session($r);
253: if ($handle ne '') {
254: my $lonidsdir=$r->dir_config('lonIDsDir');
255: if ($handle=~/^publicuser\_/) {
256: # For "public user" - remove it, we apparently really want to login
257: unlink($r->dir_config('lonIDsDir')."/$handle.id");
258: } else {
259: # Indeed, a valid token is found
260: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
261: &Apache::loncommon::content_type($r,'text/html');
262: $r->send_http_header;
263: my $start_page =
264: &Apache::loncommon::start_page('Already logged in');
265: my $end_page =
266: &Apache::loncommon::end_page();
267: my $dest = '/adm/roles';
268: if ($env{'form.firsturl'} ne '') {
269: $dest = $env{'form.firsturl'};
270: }
271: $r->print(
272: $start_page
273: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
274: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
275: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
276: .'</p>'
277: .$end_page
278: );
279: return OK;
280: }
281: }
282:
283: # ---------------------------------------------------- No valid token, continue
284:
285:
286: my $buffer;
287: if ($r->header_in('Content-length') > 0) {
288: $r->read($buffer,$r->header_in('Content-length'),0);
289: }
290: my %form;
291: foreach my $pair (split(/&/,$buffer)) {
292: my ($name,$value) = split(/=/,$pair);
293: $value =~ tr/+/ /;
294: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
295: $form{$name}=$value;
296: }
297:
298: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
299: &failed($r,'Username, password and domain need to be specified.',
300: \%form);
301: return OK;
302: }
303:
304: # split user logging in and "su"-user
305:
306: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
307: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
308: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
309: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
310:
311: my $role = $r->dir_config('lonRole');
312: my $domain = $r->dir_config('lonDefDomain');
313: my $prodir = $r->dir_config('lonUsersDir');
314: my $contact_name = &mt('LON-CAPA helpdesk');
315:
316: # ---------------------------------------- Get the information from login token
317:
318: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
319: $form{'serverid'});
320:
321: my %sessiondata;
322: if ($form{'iptoken'}) {
323: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
324: my $delete = &Apache::lonnet::tmpdel($form{'token'});
325: }
326:
327: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
328: ($tmpinfo eq 'no_such_host')) {
329: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
330: return OK;
331: } else {
332: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
333: $form{'serverid'});
334: if ( $reply ne 'ok' ) {
335: &failed($r,'Session could not be opened.',\%form);
336: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
337: return OK;
338: }
339: }
340:
341: if (!&Apache::lonnet::domain($form{'udom'})) {
342: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
343: return OK;
344: }
345:
346: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
347: if ($rolestr) {
348: $rolestr = &unescape($rolestr);
349: }
350: if ($symbstr) {
351: $symbstr= &unescape($symbstr);
352: }
353: if ($rolestr =~ /^role=/) {
354: (undef,$form{'role'}) = split('=',$rolestr);
355: }
356: if ($symbstr =~ /^symb=/) {
357: (undef,$form{'symb'}) = split('=',$symbstr);
358: }
359:
360: my $keybin=pack("H16",$key);
361:
362: my $cipher;
363: if ($Crypt::DES::VERSION>=2.03) {
364: $cipher=new Crypt::DES $keybin;
365: }
366: else {
367: $cipher=new DES $keybin;
368: }
369: my $upass='';
370: for (my $i=0;$i<=2;$i++) {
371: my $chunk=
372: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
373:
374: $chunk.=
375: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
376:
377: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
378: $upass.=$chunk;
379: }
380:
381: # ---------------------------------------------------------------- Authenticate
382:
383: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
384: my ($cancreate,$statustocreate) =
385: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
386: my $defaultauth;
387: if (ref($cancreate) eq 'ARRAY') {
388: if (grep(/^login$/,@{$cancreate})) {
389: $defaultauth = 1;
390: }
391: }
392: my $clientcancheckhost = 1;
393: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
394: $form{'udom'},$defaultauth,
395: $clientcancheckhost);
396:
397: # --------------------------------------------------------------------- Failed?
398:
399: if ($authhost eq 'no_host') {
400: &failed($r,'Username and/or password could not be authenticated.',
401: \%form);
402: return OK;
403: } elsif ($authhost eq 'no_account_on_host') {
404: if ($defaultauth) {
405: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
406: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
407: return OK;
408: }
409: my $start_page =
410: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
411: '',{'no_inline_link' => 1,});
412: my $lonhost = $r->dir_config('lonHostID');
413: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
414: my $contacts =
415: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
416: $form{'udom'},$origmail);
417: my ($contact_email) = split(',',$contacts);
418: my $output =
419: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
420: $domdesc,'',$lonhost,
421: $contact_email,$contact_name,
422: undef,$statustocreate);
423: &Apache::loncommon::content_type($r,'text/html');
424: $r->send_http_header;
425: &Apache::createaccount::print_header($r,$start_page);
426: $r->print('<h3>'.&mt('Account creation').'</h3>'.
427: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
428: $output.&Apache::loncommon::end_page());
429: return OK;
430: } else {
431: &failed($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);
432: return OK;
433: }
434: }
435:
436: if (($firsturl eq '') ||
437: ($firsturl=~/^\/adm\/(logout|remote)/)) {
438: $firsturl='/adm/roles';
439: }
440:
441: my $hosthere;
442: if ($form{'iptoken'}) {
443: if (($sessiondata{'domain'} eq $form{'udom'}) &&
444: ($sessiondata{'username'} eq $form{'uname'})) {
445: $hosthere = 1;
446: }
447: }
448:
449: # --------------------------------- Are we attempting to login as somebody else?
450: if ($form{'suname'}) {
451: # ------------ see if the original user has enough privileges to pull this stunt
452: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
453: # ---------------------------------------------------- see if the su-user exists
454: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
455: eq 'no_host') {
456: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
457: # ------------------------------ see if the su-user is not too highly privileged
458: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
459: # -------------------------------------------------------- actually switch users
460: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
461: ' logging in as '.$form{'suname'});
462: $form{'uname'}=$form{'suname'};
463: } else {
464: &Apache::lonnet::logthis('Attempted switch user to privileged user');
465: }
466: }
467: } else {
468: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
469: }
470: }
471:
472: my ($is_balancer,$otherserver);
473:
474: unless ($hosthere) {
475: ($is_balancer,$otherserver) =
476: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
477: }
478:
479: if ($is_balancer) {
480: if (!$otherserver) {
481: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
482: }
483: if ($otherserver) {
484: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
485: \%form);
486: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
487: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
488: $switchto .= '&origurl='.$firsturl;
489: }
490: if ($form{'role'}) {
491: $switchto .= '&role='.$form{'role'};
492: }
493: if ($form{'symb'}) {
494: $switchto .= '&symb='.$form{'symb'};
495: }
496: $r->internal_redirect($switchto);
497: } else {
498: $r->print(&noswitch());
499: }
500: return OK;
501: } else {
502: if (!&check_can_host($r,\%form,$authhost)) {
503: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
504: if ($otherserver) {
505: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
506: \%form);
507: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
508: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
509: $switchto .= '&origurl='.$firsturl;
510: }
511: if ($form{'role'}) {
512: $switchto .= '&role='.$form{'role'};
513: }
514: if ($form{'symb'}) {
515: $switchto .= '&symb='.$form{'symb'};
516: }
517: $r->internal_redirect($switchto);
518: } else {
519: $r->print(&noswitch());
520: }
521: return OK;
522: }
523:
524: # ------------------------------------------------------- Do the load balancing
525:
526: # ---------------------------------------------------------- Determine own load
527: my $loadlim = $r->dir_config('lonLoadLim');
528: my $loadavg;
529: {
530: my $loadfile=Apache::File->new('/proc/loadavg');
531: $loadavg=<$loadfile>;
532: }
533: $loadavg =~ s/\s.*//g;
534: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
535: my $userloadpercent=&Apache::lonnet::userload();
536:
537: # ---------------------------------------------------------- Are we overloaded?
538: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
539: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
540: if (!$unloaded) {
541: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
542: }
543: if ($unloaded) {
544: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
545: undef,\%form);
546: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
547: return OK;
548: }
549: }
550: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
551: \%form);
552: return OK;
553: }
554: }
555:
556: sub check_can_host {
557: my ($r,$form,$authhost,$domdesc) = @_;
558: return unless (ref($form) eq 'HASH');
559: my $canhost = 1;
560: my $lonhost = $r->dir_config('lonHostID');
561: my $udom = $form->{'udom'};
562: my @intdoms;
563: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
564: if (ref($internet_names) eq 'ARRAY') {
565: @intdoms = @{$internet_names};
566: }
567: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
568: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
569: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
570: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
571: my $hostname = &Apache::lonnet::hostname($lonhost);
572: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
573: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
574: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
575: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
576: my $loncaparev;
577: if ($authhost eq 'no_account_on_host') {
578: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
579: } else {
580: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
581: }
582: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
583: $udomdefaults{'remotesessions'},
584: $defdomdefaults{'hostedsessions'});
585: }
586: unless ($canhost) {
587: if ($authhost eq 'no_account_on_host') {
588: my $checkloginvia = 1;
589: my ($login_host,$hostname) =
590: &Apache::lonnet::choose_server($udom,$checkloginvia);
591: &Apache::loncommon::content_type($r,'text/html');
592: $r->send_http_header;
593: if ($login_host ne '') {
594: my $protocol = $Apache::lonnet::protocol{$login_host};
595: $protocol = 'http' if ($protocol ne 'https');
596: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
597: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
598: '<h3>'.&mt('Account creation').'</h3>'.
599: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
600: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
601: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
602: &Apache::loncommon::end_page());
603: } else {
604: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
605: '<h3>'.&mt('Account creation unavailable').'</h3>'.
606: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
607: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
608: &Apache::loncommon::end_page());
609: }
610: } else {
611: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
612: $form);
613: my ($otherserver) = &Apache::lonnet::choose_server($udom);
614: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
615: }
616: }
617: return $canhost;
618: }
619:
620: sub noswitch {
621: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
622: '<h3>'.&mt('Session unavailable').'</h3>'.
623: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
624: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
625: &Apache::loncommon::end_page();
626: return $result;
627: }
628:
629: sub loginhelpdisplay {
630: my ($authdomain) = @_;
631: my $login_help = 1;
632: my $lang = &Apache::lonlocal::current_language();
633: if ($login_help) {
634: my $dom = $authdomain;
635: if ($dom eq '') {
636: $dom = &Apache::lonnet::default_login_domain();
637: }
638: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
639: my $loginhelp_url;
640: if ($lang) {
641: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
642: if ($loginhelp_url ne '') {
643: return $loginhelp_url;
644: }
645: }
646: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
647: if ($loginhelp_url ne '') {
648: return $loginhelp_url;
649: } else {
650: return '/adm/loginproblems.html';
651: }
652: }
653: return;
654: }
655:
656: 1;
657: __END__
658:
659:
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