1: # The LearningOnline Network
2: # User Authentication Module
3: #
4: # $Id: lonauth.pm,v 1.121.2.16 2017/06/06 22:34:37 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=/; HttpOnly";
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: $desturl = &Apache::lonnet::clutter($desturl);
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 $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
122: my $startupremote=&Apache::lonmenu::startupremote($destination);
123: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
124: my $setflags=&Apache::lonmenu::setflags();
125: my $maincall=&Apache::lonmenu::maincall();
126: my $brcrum = [{'href' => '',
127: 'text' => 'Successful Login'},];
128: my $start_page=&Apache::loncommon::start_page('Successful Login',
129: $startupremote,
130: {'no_inline_link' => 1,
131: 'bread_crumbs' => $brcrum,});
132: my $end_page =&Apache::loncommon::end_page();
133:
134: my $continuelink;
135: if ($env{'environment.remote'} eq 'off') {
136: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
137: }
138: # ------------------------------------------------- Output for successful login
139:
140: &Apache::loncommon::content_type($r,'text/html');
141: $r->header_out('Set-cookie' => $cookie);
142: $r->send_http_header;
143:
144: my %lt=&Apache::lonlocal::texthash(
145: 'wel' => 'Welcome',
146: 'pro' => 'Login problems?',
147: );
148: my $loginhelp = &loginhelpdisplay($domain);
149: if ($loginhelp) {
150: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
151: }
152:
153: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
154: $r->print(<<ENDSUCCESS);
155: $start_page
156: $setflags
157: $windowinfo
158: <h1>$lt{'wel'}</h1>
159: $welcome
160: $loginhelp
161: $remoteinfo
162: $maincall
163: $continuelink
164: $end_page
165: ENDSUCCESS
166: return;
167: }
168:
169: # --------------------------------------------------------------- Failed login!
170:
171: sub failed {
172: my ($r,$message,$form) = @_;
173: (undef,undef,undef,my $clientmathml,my $clientunicode) =
174: &Apache::loncommon::decode_user_agent();
175: my $args = {};
176: if ($clientunicode && !$clientmathml) {
177: $args = {'browser.unicode' => 1};
178: }
179:
180: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
181: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
182: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
183: if (&Apache::lonnet::domain($udom,'description') eq '') {
184: undef($udom);
185: }
186: my $retry = '/adm/login';
187: if ($uname eq $form->{'uname'}) {
188: $retry .= '?username='.$uname;
189: }
190: if ($udom) {
191: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
192: }
193: if (exists($form->{role})) {
194: my $role = &Apache::loncommon::cleanup_html($form->{role});
195: if ($role ne '') {
196: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
197: }
198: }
199: if (exists($form->{symb})) {
200: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
201: if ($symb ne '') {
202: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
203: }
204: }
205: my $end_page = &Apache::loncommon::end_page();
206: &Apache::loncommon::content_type($r,'text/html');
207: $r->send_http_header;
208: my @actions =
209: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
210: my $loginhelp = &loginhelpdisplay($udom);
211: if ($loginhelp) {
212: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
213: }
214: #FIXME: link to helpdesk might be added here
215:
216: $r->print(
217: $start_page
218: .'<h2>'.&mt('Sorry ...').'</h2>'
219: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
220: .&Apache::lonhtmlcommon::actionbox(\@actions)
221: .$end_page
222: );
223: }
224:
225: # ------------------------------------------------------------------ Rerouting!
226:
227: sub reroute {
228: my ($r) = @_;
229: &Apache::loncommon::content_type($r,'text/html');
230: $r->send_http_header;
231: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
232: .&mt('Please [_1]log in again[_2].');
233: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
234: }
235:
236: # ---------------------------------------------------------------- Main handler
237:
238: sub handler {
239: my $r = shift;
240: my $londocroot = $r->dir_config('lonDocRoot');
241: # Are we re-routing?
242: if (-e "$londocroot/lon-status/reroute.txt") {
243: &reroute($r);
244: return OK;
245: }
246:
247: &Apache::lonlocal::get_language_handle($r);
248:
249: # -------------------------------- Prevent users from attempting to login twice
250: my $handle = &Apache::lonnet::check_for_valid_session($r);
251: if ($handle ne '') {
252: my $lonidsdir=$r->dir_config('lonIDsDir');
253: if ($handle=~/^publicuser\_/) {
254: # For "public user" - remove it, we apparently really want to login
255: unlink($r->dir_config('lonIDsDir')."/$handle.id");
256: } else {
257: # Indeed, a valid token is found
258: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
259: &Apache::loncommon::content_type($r,'text/html');
260: $r->send_http_header;
261: my $start_page =
262: &Apache::loncommon::start_page('Already logged in');
263: my $end_page =
264: &Apache::loncommon::end_page();
265: my $dest = '/adm/roles';
266: if ($env{'form.firsturl'} ne '') {
267: $dest = $env{'form.firsturl'};
268: }
269: $r->print(
270: $start_page
271: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
272: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
273: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
274: .'</p>'
275: .$end_page
276: );
277: return OK;
278: }
279: }
280:
281: # ---------------------------------------------------- No valid token, continue
282:
283:
284: my $buffer;
285: if ($r->header_in('Content-length') > 0) {
286: $r->read($buffer,$r->header_in('Content-length'),0);
287: }
288: my %form;
289: foreach my $pair (split(/&/,$buffer)) {
290: my ($name,$value) = split(/=/,$pair);
291: $value =~ tr/+/ /;
292: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
293: $form{$name}=$value;
294: }
295:
296: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
297: &failed($r,'Username, password and domain need to be specified.',
298: \%form);
299: return OK;
300: }
301:
302: # split user logging in and "su"-user
303:
304: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
305: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
306: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
307: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
308:
309: my $role = $r->dir_config('lonRole');
310: my $domain = $r->dir_config('lonDefDomain');
311: my $prodir = $r->dir_config('lonUsersDir');
312: my $contact_name = &mt('LON-CAPA helpdesk');
313:
314: # ---------------------------------------- Get the information from login token
315:
316: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
317: $form{'serverid'});
318:
319: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
320: ($tmpinfo eq 'no_such_host')) {
321: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
322: return OK;
323: } else {
324: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
325: $form{'serverid'});
326: if ( $reply ne 'ok' ) {
327: &failed($r,'Session could not be opened.',\%form);
328: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
329: return OK;
330: }
331: }
332:
333: if (!&Apache::lonnet::domain($form{'udom'})) {
334: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
335: return OK;
336: }
337:
338: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
339: if ($rolestr) {
340: $rolestr = &unescape($rolestr);
341: }
342: if ($symbstr) {
343: $symbstr= &unescape($symbstr);
344: }
345: if ($iptokenstr) {
346: $iptokenstr = &unescape($iptokenstr);
347: }
348: if ($rolestr =~ /^role=/) {
349: (undef,$form{'role'}) = split('=',$rolestr);
350: }
351: if ($symbstr =~ /^symb=/) {
352: (undef,$form{'symb'}) = split('=',$symbstr);
353: }
354: if ($iptokenstr =~ /^iptoken=/) {
355: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
356: }
357:
358: my $upass = &Apache::loncommon::des_decrypt($key,$form{'upass0'});
359:
360: # ---------------------------------------------------------------- Authenticate
361:
362: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
363: my ($cancreate,$statustocreate) =
364: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
365: my $defaultauth;
366: if (ref($cancreate) eq 'ARRAY') {
367: if (grep(/^login$/,@{$cancreate})) {
368: $defaultauth = 1;
369: }
370: }
371: my $clientcancheckhost = 1;
372: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
373: $form{'udom'},$defaultauth,
374: $clientcancheckhost);
375:
376: # --------------------------------------------------------------------- Failed?
377:
378: if ($authhost eq 'no_host') {
379: &failed($r,'Username and/or password could not be authenticated.',
380: \%form);
381: return OK;
382: } elsif ($authhost eq 'no_account_on_host') {
383: if ($defaultauth) {
384: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
385: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
386: return OK;
387: }
388: my $start_page =
389: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
390: '',{'no_inline_link' => 1,});
391: my $lonhost = $r->dir_config('lonHostID');
392: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
393: my $contacts =
394: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
395: $form{'udom'},$origmail);
396: my ($contact_email) = split(',',$contacts);
397: my $output =
398: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
399: $domdesc,'',$lonhost,
400: $contact_email,$contact_name,
401: undef,$statustocreate);
402: &Apache::loncommon::content_type($r,'text/html');
403: $r->send_http_header;
404: &Apache::createaccount::print_header($r,$start_page);
405: $r->print('<h3>'.&mt('Account creation').'</h3>'.
406: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
407: $output.&Apache::loncommon::end_page());
408: return OK;
409: } else {
410: &failed($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);
411: return OK;
412: }
413: }
414:
415: if (($firsturl eq '') ||
416: ($firsturl=~/^\/adm\/(logout|remote)/)) {
417: $firsturl='/adm/roles';
418: }
419:
420: my $hosthere;
421: if ($form{'iptoken'}) {
422: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
423: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
424: if (($sessiondata{'domain'} eq $form{'udom'}) &&
425: ($sessiondata{'username'} eq $form{'uname'})) {
426: $hosthere = 1;
427: }
428: }
429:
430: # --------------------------------- Are we attempting to login as somebody else?
431: if ($form{'suname'}) {
432: # ------------ see if the original user has enough privileges to pull this stunt
433: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
434: # ---------------------------------------------------- see if the su-user exists
435: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
436: eq 'no_host') {
437: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
438: # ------------------------------ see if the su-user is not too highly privileged
439: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
440: # -------------------------------------------------------- actually switch users
441: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
442: ' logging in as '.$form{'suname'});
443: $form{'uname'}=$form{'suname'};
444: } else {
445: &Apache::lonnet::logthis('Attempted switch user to privileged user');
446: }
447: }
448: } else {
449: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
450: }
451: }
452:
453: my ($is_balancer,$otherserver);
454:
455: unless ($hosthere) {
456: ($is_balancer,$otherserver) =
457: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
458: if ($is_balancer) {
459: if ($otherserver eq '') {
460: my $lowest_load;
461: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
462: if ($lowest_load > 100) {
463: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
464: }
465: }
466: if ($otherserver ne '') {
467: my @hosts = &Apache::lonnet::current_machine_ids();
468: if (grep(/^\Q$otherserver\E$/,@hosts)) {
469: $hosthere = $otherserver;
470: }
471: }
472: }
473: }
474:
475: if (($is_balancer) && (!$hosthere)) {
476: if ($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: $r->print(&noswitch());
492: }
493: return OK;
494: } else {
495: if (!&check_can_host($r,\%form,$authhost)) {
496: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
497: if ($otherserver) {
498: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
499: \%form);
500: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
501: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
502: $switchto .= '&origurl='.$firsturl;
503: }
504: if ($form{'role'}) {
505: $switchto .= '&role='.$form{'role'};
506: }
507: if ($form{'symb'}) {
508: $switchto .= '&symb='.$form{'symb'};
509: }
510: $r->internal_redirect($switchto);
511: } else {
512: $r->print(&noswitch());
513: }
514: return OK;
515: }
516:
517: # ------------------------------------------------------- Do the load balancing
518:
519: # ---------------------------------------------------------- Determine own load
520: my $loadlim = $r->dir_config('lonLoadLim');
521: my $loadavg;
522: {
523: my $loadfile=Apache::File->new('/proc/loadavg');
524: $loadavg=<$loadfile>;
525: }
526: $loadavg =~ s/\s.*//g;
527: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
528: my $userloadpercent=&Apache::lonnet::userload();
529:
530: # ---------------------------------------------------------- Are we overloaded?
531: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
532: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
533: if (!$unloaded) {
534: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
535: }
536: if ($unloaded) {
537: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
538: undef,\%form);
539: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
540: return OK;
541: }
542: }
543: if (($is_balancer) && ($hosthere)) {
544: $form{'noloadbalance'} = $hosthere;
545: }
546: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
547: \%form);
548: return OK;
549: }
550: }
551:
552: sub check_can_host {
553: my ($r,$form,$authhost,$domdesc) = @_;
554: return unless (ref($form) eq 'HASH');
555: my $canhost = 1;
556: my $lonhost = $r->dir_config('lonHostID');
557: my $udom = $form->{'udom'};
558: my @intdoms;
559: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
560: if (ref($internet_names) eq 'ARRAY') {
561: @intdoms = @{$internet_names};
562: }
563: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
564: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
565: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
566: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
567: my $hostname = &Apache::lonnet::hostname($lonhost);
568: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
569: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
570: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
571: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
572: my $loncaparev;
573: if ($authhost eq 'no_account_on_host') {
574: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
575: } else {
576: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
577: }
578: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
579: $udomdefaults{'remotesessions'},
580: $defdomdefaults{'hostedsessions'});
581: }
582: unless ($canhost) {
583: if ($authhost eq 'no_account_on_host') {
584: my $checkloginvia = 1;
585: my ($login_host,$hostname) =
586: &Apache::lonnet::choose_server($udom,$checkloginvia);
587: &Apache::loncommon::content_type($r,'text/html');
588: $r->send_http_header;
589: if ($login_host ne '') {
590: my $protocol = $Apache::lonnet::protocol{$login_host};
591: $protocol = 'http' if ($protocol ne 'https');
592: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
593: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
594: '<h3>'.&mt('Account creation').'</h3>'.
595: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
596: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
597: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
598: &Apache::loncommon::end_page());
599: } else {
600: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
601: '<h3>'.&mt('Account creation unavailable').'</h3>'.
602: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
603: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
604: &Apache::loncommon::end_page());
605: }
606: } else {
607: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
608: $form);
609: my ($otherserver) = &Apache::lonnet::choose_server($udom);
610: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
611: }
612: }
613: return $canhost;
614: }
615:
616: sub noswitch {
617: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
618: '<h3>'.&mt('Session unavailable').'</h3>'.
619: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
620: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
621: &Apache::loncommon::end_page();
622: return $result;
623: }
624:
625: sub loginhelpdisplay {
626: my ($authdomain) = @_;
627: my $login_help = 1;
628: my $lang = &Apache::lonlocal::current_language();
629: if ($login_help) {
630: my $dom = $authdomain;
631: if ($dom eq '') {
632: $dom = &Apache::lonnet::default_login_domain();
633: }
634: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
635: my $loginhelp_url;
636: if ($lang) {
637: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
638: if ($loginhelp_url ne '') {
639: return $loginhelp_url;
640: }
641: }
642: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
643: if ($loginhelp_url ne '') {
644: return $loginhelp_url;
645: } else {
646: return '/adm/loginproblems.html';
647: }
648: }
649: return;
650: }
651:
652: 1;
653: __END__
654:
655:
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