Annotation of loncom/auth/lonauth.pm, revision 1.143
1.136 kruse 1: # The LearningOnline Network
2: # User Authentication Module
3: #
1.143 ! raeburn 4: # $Id: lonauth.pm,v 1.142 2017/02/17 14:34:21 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;
1.140 raeburn 32: use LONCAPA qw(:DEFAULT :match);
1.136 kruse 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;
1.143 ! raeburn 45: use Digest::MD5;
1.136 kruse 46:
47: # ------------------------------------------------------------ Successful login
48: sub success {
49: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
50: $form) = @_;
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 $cookie; }
61:
62: # -------------------------------------------------------------------- Log this
63:
64: &Apache::lonnet::log($domain,$username,$authhost,
65: "Login $ENV{'REMOTE_ADDR'}");
66:
67: # ------------------------------------------------- Check for critical messages
68:
69: my @what=&Apache::lonnet::dump('critical',$domain,$username);
70: if ($what[0]) {
71: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
72: $lowerurl='/adm/email?critical=display';
73: }
74: }
75:
1.143 ! raeburn 76: # ----------------------------------------------------------- Get cookies ready
! 77: my ($securecookie,$defaultcookie);
! 78: if ($ENV{'SERVER_PORT'} == 443) {
! 79: $securecookie="lonID=$cookie; path=/; HttpOnly; secure";
! 80: my $lonidsdir=$r->dir_config('lonIDsDir');
! 81: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
! 82: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
! 83: if (-e "$lonidsdir/$linkname.id") {
! 84: unlink("$lonidsdir/$linkname.id");
! 85: }
! 86: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
! 87: "$lonidsdir/$linkname.id"); 1 };
! 88: if ($made_symlink) {
! 89: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
! 90: &Apache::lonnet::appenv({'user.linkedenv' => "$lonidsdir/$linkname.id"});
! 91: }
! 92: }
! 93: } else {
! 94: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
! 95: }
1.136 kruse 96: # -------------------------------------------------------- Menu script and info
97: my $destination = $lowerurl;
98:
99: if (defined($form->{role})) {
100: my $envkey = 'user.role.'.$form->{role};
101: my $now=time;
102: my $then=$env{'user.login.time'};
103: my $refresh=$env{'user.refresh.time'};
104: my $update=$env{'user.update.time'};
105: if (!$update) {
106: $update = $then;
107: }
108: if (exists($env{$envkey})) {
109: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
110: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
111: \$trolecode,\$tstatus,\$tstart,\$tend);
112: if ($tstatus eq 'is') {
113: $destination .= ($destination =~ /\?/) ? '&' : '?';
114: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
115: $destination .= 'selectrole=1&'.$newrole.'=1';
116: }
117: }
118: }
119: if (defined($form->{symb})) {
120: my $destsymb = $form->{symb};
121: $destination .= ($destination =~ /\?/) ? '&' : '?';
122: if ($destsymb =~ /___/) {
123: # FIXME Need to deal with encrypted symbs and urls as needed.
124: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.137 raeburn 125: $desturl = &Apache::lonnet::clutter($desturl);
1.136 kruse 126: $desturl = &HTML::Entities::encode($desturl,'"<>&');
127: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
128: $destination .= 'destinationurl='.$desturl.
129: '&destsymb='.$destsymb;
130: } else {
131: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
132: $destination .= 'destinationurl='.$destsymb;
133: }
134: }
135: if ($destination =~ m{^/adm/roles}) {
136: $destination .= ($destination =~ /\?/) ? '&' : '?';
137: $destination .= 'source=login';
138: }
139:
140: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
141: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
142: my $brcrum = [{'href' => '',
143: 'text' => 'Successful Login'},];
1.140 raeburn 144: my $args = {'bread_crumbs' => $brcrum,};
145: unless ((defined($form->{role})) || (defined($form->{symb}))) {
146: my $update=$env{'user.update.time'};
147: if (!$update) {
148: $update = $env{'user.login.time'};
149: }
150: my %roles_in_env;
151: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
152: if ($showcount == 1) {
153: foreach my $rolecode (keys(%roles_in_env)) {
154: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
155: if ($cid) {
156: my %coursedescription =
157: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
158: if ($coursedescription{'type'} eq 'Placement') {
159: $args->{'crstype'} = 'Placement';
160: }
161: last;
162: }
163: }
164: }
165: }
1.136 kruse 166: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.140 raeburn 167: $header,$args);
1.136 kruse 168: my $end_page =&Apache::loncommon::end_page();
169:
170: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
171: # ------------------------------------------------- Output for successful login
172:
173: &Apache::loncommon::content_type($r,'text/html');
1.143 ! raeburn 174: if ($securecookie) {
! 175: $r->headers_out->add('Set-cookie' => $securecookie);
! 176: }
! 177: if ($defaultcookie) {
! 178: $r->headers_out->add('Set-cookie' => $defaultcookie);
! 179: }
1.136 kruse 180: $r->send_http_header;
181:
182: my %lt=&Apache::lonlocal::texthash(
183: 'wel' => 'Welcome',
184: 'pro' => 'Login problems?',
185: );
186: my $loginhelp = &loginhelpdisplay($domain);
187: if ($loginhelp) {
188: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
189: }
190:
191: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
192: $r->print(<<ENDSUCCESS);
193: $start_page
194: $windowinfo
195: <h1>$lt{'wel'}</h1>
196: $welcome
197: $loginhelp
198: $continuelink
199: $end_page
200: ENDSUCCESS
201: return;
202: }
203:
204: # --------------------------------------------------------------- Failed login!
205:
206: sub failed {
207: my ($r,$message,$form) = @_;
208: (undef,undef,undef,my $clientmathml,my $clientunicode) =
209: &Apache::loncommon::decode_user_agent();
210: my $args = {};
211: if ($clientunicode && !$clientmathml) {
212: $args = {'browser.unicode' => 1};
213: }
214:
215: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
216: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
217: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
218: if (&Apache::lonnet::domain($udom,'description') eq '') {
219: undef($udom);
220: }
221: my $retry = '/adm/login';
222: if ($uname eq $form->{'uname'}) {
223: $retry .= '?username='.$uname;
224: }
225: if ($udom) {
226: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
227: }
228: if (exists($form->{role})) {
229: my $role = &Apache::loncommon::cleanup_html($form->{role});
230: if ($role ne '') {
231: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
232: }
233: }
234: if (exists($form->{symb})) {
235: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
236: if ($symb ne '') {
237: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
238: }
239: }
240: my $end_page = &Apache::loncommon::end_page();
241: &Apache::loncommon::content_type($r,'text/html');
242: $r->send_http_header;
243: my @actions =
244: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
245: my $loginhelp = &loginhelpdisplay($udom);
246: if ($loginhelp) {
247: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
248: }
249: #FIXME: link to helpdesk might be added here
250:
251: $r->print(
252: $start_page
253: .'<h2>'.&mt('Sorry ...').'</h2>'
254: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
255: .&Apache::lonhtmlcommon::actionbox(\@actions)
256: .$end_page
257: );
258: }
259:
260: # ------------------------------------------------------------------ Rerouting!
261:
262: sub reroute {
263: my ($r) = @_;
264: &Apache::loncommon::content_type($r,'text/html');
265: $r->send_http_header;
266: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
267: .&mt('Please [_1]log in again[_2].');
268: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
269: }
270:
271: # ---------------------------------------------------------------- Main handler
272:
273: sub handler {
274: my $r = shift;
275: my $londocroot = $r->dir_config('lonDocRoot');
276: # Are we re-routing?
277: if (-e "$londocroot/lon-status/reroute.txt") {
278: &reroute($r);
279: return OK;
280: }
281:
282: &Apache::lonlocal::get_language_handle($r);
283:
284: # -------------------------------- Prevent users from attempting to login twice
285: my $handle = &Apache::lonnet::check_for_valid_session($r);
286: if ($handle ne '') {
287: my $lonidsdir=$r->dir_config('lonIDsDir');
288: if ($handle=~/^publicuser\_/) {
289: # For "public user" - remove it, we apparently really want to login
290: unlink($r->dir_config('lonIDsDir')."/$handle.id");
291: } else {
292: # Indeed, a valid token is found
293: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
294: &Apache::loncommon::content_type($r,'text/html');
295: $r->send_http_header;
296: my $start_page =
297: &Apache::loncommon::start_page('Already logged in');
298: my $end_page =
299: &Apache::loncommon::end_page();
300: my $dest = '/adm/roles';
301: if ($env{'form.firsturl'} ne '') {
302: $dest = $env{'form.firsturl'};
303: }
304: $r->print(
305: $start_page
306: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
307: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
308: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
309: .'</p>'
310: .$end_page
311: );
312: return OK;
313: }
314: }
315:
316: # ---------------------------------------------------- No valid token, continue
317:
318:
319: my $buffer;
320: if ($r->header_in('Content-length') > 0) {
321: $r->read($buffer,$r->header_in('Content-length'),0);
322: }
323: my %form;
324: foreach my $pair (split(/&/,$buffer)) {
325: my ($name,$value) = split(/=/,$pair);
326: $value =~ tr/+/ /;
327: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
328: $form{$name}=$value;
329: }
330:
331: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
332: &failed($r,'Username, password and domain need to be specified.',
333: \%form);
334: return OK;
335: }
336:
337: # split user logging in and "su"-user
338:
339: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
340: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
341: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
342: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
343:
344: my $role = $r->dir_config('lonRole');
345: my $domain = $r->dir_config('lonDefDomain');
346: my $prodir = $r->dir_config('lonUsersDir');
347: my $contact_name = &mt('LON-CAPA helpdesk');
348:
349: # ---------------------------------------- Get the information from login token
350:
351: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
352: $form{'serverid'});
353:
354: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
355: ($tmpinfo eq 'no_such_host')) {
356: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
357: return OK;
358: } else {
359: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
360: $form{'serverid'});
361: if ( $reply ne 'ok' ) {
362: &failed($r,'Session could not be opened.',\%form);
363: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
364: return OK;
365: }
366: }
367:
368: if (!&Apache::lonnet::domain($form{'udom'})) {
369: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
370: return OK;
371: }
372:
1.138 raeburn 373: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
1.136 kruse 374: if ($rolestr) {
375: $rolestr = &unescape($rolestr);
376: }
377: if ($symbstr) {
378: $symbstr= &unescape($symbstr);
379: }
1.138 raeburn 380: if ($iptokenstr) {
381: $iptokenstr = &unescape($iptokenstr);
382: }
1.136 kruse 383: if ($rolestr =~ /^role=/) {
384: (undef,$form{'role'}) = split('=',$rolestr);
385: }
386: if ($symbstr =~ /^symb=/) {
387: (undef,$form{'symb'}) = split('=',$symbstr);
388: }
1.138 raeburn 389: if ($iptokenstr =~ /^iptoken=/) {
390: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
391: }
1.136 kruse 392:
1.139 raeburn 393: my $upass = $ENV{HTTPS} ? $form{'upass0'}
394: : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
1.136 kruse 395:
396: # ---------------------------------------------------------------- Authenticate
397:
398: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
399: my ($cancreate,$statustocreate) =
400: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
401: my $defaultauth;
402: if (ref($cancreate) eq 'ARRAY') {
403: if (grep(/^login$/,@{$cancreate})) {
404: $defaultauth = 1;
405: }
406: }
407: my $clientcancheckhost = 1;
408: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
409: $form{'udom'},$defaultauth,
410: $clientcancheckhost);
411:
412: # --------------------------------------------------------------------- Failed?
413:
414: if ($authhost eq 'no_host') {
415: &failed($r,'Username and/or password could not be authenticated.',
416: \%form);
417: return OK;
418: } elsif ($authhost eq 'no_account_on_host') {
419: if ($defaultauth) {
420: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
421: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
422: return OK;
423: }
424: my $start_page =
425: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
426: my $lonhost = $r->dir_config('lonHostID');
427: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
428: my $contacts =
429: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
430: $form{'udom'},$origmail);
431: my ($contact_email) = split(',',$contacts);
432: my $output =
433: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
434: $domdesc,'',$lonhost,
435: $contact_email,$contact_name,
436: undef,$statustocreate);
437: &Apache::loncommon::content_type($r,'text/html');
438: $r->send_http_header;
439: &Apache::createaccount::print_header($r,$start_page);
440: $r->print('<h3>'.&mt('Account creation').'</h3>'.
441: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
442: $output.&Apache::loncommon::end_page());
443: return OK;
444: } else {
445: &failed($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);
446: return OK;
447: }
448: }
449:
450: if (($firsturl eq '') ||
451: ($firsturl=~/^\/adm\/(logout|remote)/)) {
452: $firsturl='/adm/roles';
453: }
454:
455: my $hosthere;
456: if ($form{'iptoken'}) {
1.138 raeburn 457: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
458: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.136 kruse 459: if (($sessiondata{'domain'} eq $form{'udom'}) &&
460: ($sessiondata{'username'} eq $form{'uname'})) {
461: $hosthere = 1;
462: }
463: }
464:
465: # --------------------------------- Are we attempting to login as somebody else?
466: if ($form{'suname'}) {
467: # ------------ see if the original user has enough privileges to pull this stunt
468: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
469: # ---------------------------------------------------- see if the su-user exists
470: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
471: eq 'no_host') {
472: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
473: # ------------------------------ see if the su-user is not too highly privileged
474: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
475: # -------------------------------------------------------- actually switch users
476: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
477: ' logging in as '.$form{'suname'});
478: $form{'uname'}=$form{'suname'};
479: } else {
480: &Apache::lonnet::logthis('Attempted switch user to privileged user');
481: }
482: }
483: } else {
484: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
485: }
486: }
487:
488: my ($is_balancer,$otherserver);
489:
490: unless ($hosthere) {
491: ($is_balancer,$otherserver) =
1.141 raeburn 492: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
493: if ($is_balancer) {
494: if ($otherserver eq '') {
495: my $lowest_load;
496: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
497: if ($lowest_load > 100) {
498: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
499: }
500: }
501: if ($otherserver ne '') {
502: my @hosts = &Apache::lonnet::current_machine_ids();
503: if (grep(/^\Q$otherserver\E$/,@hosts)) {
504: $hosthere = $otherserver;
505: }
506: }
507: }
1.136 kruse 508: }
509:
1.141 raeburn 510: if (($is_balancer) && (!$hosthere)) {
1.136 kruse 511: if ($otherserver) {
512: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
513: \%form);
514: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
515: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
516: $switchto .= '&origurl='.$firsturl;
517: }
518: if ($form{'role'}) {
519: $switchto .= '&role='.$form{'role'};
520: }
521: if ($form{'symb'}) {
522: $switchto .= '&symb='.$form{'symb'};
523: }
524: $r->internal_redirect($switchto);
525: } else {
526: $r->print(&noswitch());
527: }
528: return OK;
529: } else {
530: if (!&check_can_host($r,\%form,$authhost)) {
531: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
532: if ($otherserver) {
533: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
534: \%form);
535: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
536: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
537: $switchto .= '&origurl='.$firsturl;
538: }
539: if ($form{'role'}) {
540: $switchto .= '&role='.$form{'role'};
541: }
542: if ($form{'symb'}) {
543: $switchto .= '&symb='.$form{'symb'};
544: }
545: $r->internal_redirect($switchto);
546: } else {
547: $r->print(&noswitch());
548: }
549: return OK;
550: }
551:
552: # ------------------------------------------------------- Do the load balancing
553:
554: # ---------------------------------------------------------- Determine own load
555: my $loadlim = $r->dir_config('lonLoadLim');
556: my $loadavg;
557: {
558: my $loadfile=Apache::File->new('/proc/loadavg');
559: $loadavg=<$loadfile>;
560: }
561: $loadavg =~ s/\s.*//g;
562: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
563: my $userloadpercent=&Apache::lonnet::userload();
564:
565: # ---------------------------------------------------------- Are we overloaded?
566: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
567: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
568: if (!$unloaded) {
569: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
570: }
571: if ($unloaded) {
572: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
573: undef,\%form);
574: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
575: return OK;
576: }
577: }
1.141 raeburn 578: if (($is_balancer) && ($hosthere)) {
579: $form{'noloadbalance'} = $hosthere;
580: }
1.136 kruse 581: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
582: \%form);
583: return OK;
584: }
585: }
586:
587: sub check_can_host {
588: my ($r,$form,$authhost,$domdesc) = @_;
589: return unless (ref($form) eq 'HASH');
590: my $canhost = 1;
591: my $lonhost = $r->dir_config('lonHostID');
592: my $udom = $form->{'udom'};
593: my @intdoms;
594: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
595: if (ref($internet_names) eq 'ARRAY') {
596: @intdoms = @{$internet_names};
597: }
598: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
599: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
600: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
601: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
602: my $hostname = &Apache::lonnet::hostname($lonhost);
603: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
604: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
605: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
606: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
607: my $loncaparev;
608: if ($authhost eq 'no_account_on_host') {
609: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
610: } else {
611: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
612: }
613: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
614: $udomdefaults{'remotesessions'},
615: $defdomdefaults{'hostedsessions'});
616: }
617: unless ($canhost) {
618: if ($authhost eq 'no_account_on_host') {
619: my $checkloginvia = 1;
620: my ($login_host,$hostname) =
621: &Apache::lonnet::choose_server($udom,$checkloginvia);
622: &Apache::loncommon::content_type($r,'text/html');
623: $r->send_http_header;
624: if ($login_host ne '') {
625: my $protocol = $Apache::lonnet::protocol{$login_host};
626: $protocol = 'http' if ($protocol ne 'https');
627: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
628: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
629: '<h3>'.&mt('Account creation').'</h3>'.
630: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
631: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
632: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
633: &Apache::loncommon::end_page());
634: } else {
635: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
636: '<h3>'.&mt('Account creation unavailable').'</h3>'.
637: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
638: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
639: &Apache::loncommon::end_page());
640: }
641: } else {
642: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
643: $form);
644: my ($otherserver) = &Apache::lonnet::choose_server($udom);
645: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
646: }
647: }
648: return $canhost;
649: }
650:
651: sub noswitch {
652: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
653: '<h3>'.&mt('Session unavailable').'</h3>'.
654: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
655: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
656: &Apache::loncommon::end_page();
657: return $result;
658: }
659:
660: sub loginhelpdisplay {
661: my ($authdomain) = @_;
662: my $login_help = 1;
663: my $lang = &Apache::lonlocal::current_language();
664: if ($login_help) {
665: my $dom = $authdomain;
666: if ($dom eq '') {
667: $dom = &Apache::lonnet::default_login_domain();
668: }
669: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
670: my $loginhelp_url;
671: if ($lang) {
672: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
673: if ($loginhelp_url ne '') {
674: return $loginhelp_url;
675: }
676: }
677: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
678: if ($loginhelp_url ne '') {
679: return $loginhelp_url;
680: } else {
681: return '/adm/loginproblems.html';
682: }
683: }
684: return;
685: }
686:
687: 1;
688: __END__
689:
690:
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