Annotation of loncom/auth/lonauth.pm, revision 1.121.2.1
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.121.2.1! raeburn 4: # $Id: lonauth.pm,v 1.121 2012/04/11 11:40:07 goltermann Exp $
1.27 www 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: #
1.1 albertel 28:
29: package Apache::lonauth;
30:
1.18 albertel 31: use strict;
1.78 albertel 32: use LONCAPA;
1.1 albertel 33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
1.26 harris41 35: use DynaLoader; # for Crypt::DES version
1.8 www 36: use Crypt::DES;
1.45 matthew 37: use Apache::loncommon();
1.66 albertel 38: use Apache::lonnet;
1.12 www 39: use Apache::lonmenu();
1.90 raeburn 40: use Apache::createaccount;
1.18 albertel 41: use Fcntl qw(:flock);
1.56 www 42: use Apache::lonlocal;
1.119 raeburn 43: use Apache::File();
1.101 raeburn 44: use HTML::Entities;
1.85 albertel 45:
1.1 albertel 46: # ------------------------------------------------------------ Successful login
1.85 albertel 47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
49: $form) = @_;
1.1 albertel 50:
1.85 albertel 51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
1.86 albertel 55: {'extra_env' => $extra_env,});
1.4 www 56:
1.69 albertel 57: my $public=($username eq 'public' && $domain eq 'public');
58:
1.85 albertel 59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78 albertel 60:
1.7 www 61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 65:
1.14 www 66: # ------------------------------------------------- Check for critical messages
67:
1.21 www 68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 69: if ($what[0]) {
1.22 www 70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 71: $lowerurl='/adm/email?critical=display';
1.14 www 72: }
73: }
74:
1.5 www 75: # ------------------------------------------------------------ Get cookie ready
1.1 albertel 76: $cookie="lonID=$cookie; path=/";
1.12 www 77: # -------------------------------------------------------- Menu script and info
1.100 raeburn 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'};
1.111 raeburn 85: my $update=$env{'user.update.time'};
86: if (!$update) {
87: $update = $then;
88: }
1.100 raeburn 89: if (exists($env{$envkey})) {
90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
1.111 raeburn 91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
1.100 raeburn 92: \$trolecode,\$tstatus,\$tstart,\$tend);
93: if ($tstatus eq 'is') {
1.101 raeburn 94: $destination .= ($destination =~ /\?/) ? '&' : '?';
95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
96: $destination .= 'selectrole=1&'.$newrole.'=1';
1.100 raeburn 97: }
98: }
99: }
1.101 raeburn 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|uploaded|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: }
1.111 raeburn 118: if ($destination =~ m{^/adm/roles}) {
119: $destination .= ($destination =~ /\?/) ? '&' : '?';
120: $destination .= 'source=login';
121: }
1.100 raeburn 122:
1.121.2.1! raeburn 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();
1.99 bisitz 128: my $brcrum = [{'href' => '',
129: 'text' => 'Successful Login'},];
1.74 albertel 130: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.121.2.1! raeburn 131: $startupremote,
! 132: {'no_inline_link' => 1,
! 133: 'bread_crumbs' => $brcrum,});
1.74 albertel 134: my $end_page =&Apache::loncommon::end_page();
135:
1.121.2.1! raeburn 136: my $continuelink;
! 137: if ($env{'environment.remote'} eq 'off') {
! 138: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
! 139: }
1.5 www 140: # ------------------------------------------------- Output for successful login
141:
1.74 albertel 142: &Apache::loncommon::content_type($r,'text/html');
143: $r->header_out('Set-cookie' => $cookie);
144: $r->send_http_header;
1.1 albertel 145:
1.58 www 146: my %lt=&Apache::lonlocal::texthash(
147: 'wel' => 'Welcome',
1.92 bisitz 148: 'pro' => 'Login problems?',
1.58 www 149: 'log' => 'loginproblems.html',
150: );
1.112 raeburn 151: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
1.1 albertel 152: $r->print(<<ENDSUCCESS);
1.74 albertel 153: $start_page
1.121.2.1! raeburn 154: $setflags
1.19 www 155: $windowinfo
1.58 www 156: <h1>$lt{'wel'}</h1>
1.112 raeburn 157: $welcome<p>
1.92 bisitz 158: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
1.121.2.1! raeburn 159: $remoteinfo
! 160: $maincall
1.64 albertel 161: $continuelink
1.74 albertel 162: $end_page
1.1 albertel 163: ENDSUCCESS
164: }
165:
166: # --------------------------------------------------------------- Failed login!
167:
168: sub failed {
1.85 albertel 169: my ($r,$message,$form) = @_;
1.104 droeschl 170: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
1.100 raeburn 171: my $retry = '/adm/login?username='.$form->{'uname'}.
172: '&domain='.$form->{'udom'};
173: if (exists($form->{role})) {
174: $retry .= '&role='.$form->{role};
175: }
176: if (exists($form->{symb})) {
177: $retry .= '&symb='.$form->{symb};
178: }
1.74 albertel 179: my $end_page = &Apache::loncommon::end_page();
180: &Apache::loncommon::content_type($r,'text/html');
181: $r->send_http_header;
1.92 bisitz 182: $r->print(
183: $start_page
184: .'<h1>'.&mt('Sorry ...').'</h1>'
1.95 bisitz 185: .'<p class="LC_warning">'.&mt($message).'</p>'
1.100 raeburn 186: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92 bisitz 187: .'</p>'
188: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
189: .$end_page
190: );
191: }
1.60 www 192:
1.55 www 193: # ------------------------------------------------------------------ Rerouting!
194:
195: sub reroute {
1.74 albertel 196: my ($r) = @_;
197: &Apache::loncommon::content_type($r,'text/html');
198: $r->send_http_header;
1.92 bisitz 199: my $msg='<h1>'.&mt('Sorry ...').'</h1>'
200: .&mt('Please [_1]log in again[_2].');
1.74 albertel 201: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 202: }
203:
1.1 albertel 204: # ---------------------------------------------------------------- Main handler
205:
206: sub handler {
207: my $r = shift;
1.120 raeburn 208: my $londocroot = $r->dir_config('lonDocRoot');
1.85 albertel 209: my $form;
1.55 www 210: # Are we re-routing?
1.120 raeburn 211: if (-e "$londocroot/lon-status/reroute.txt") {
1.55 www 212: &reroute($r);
213: return OK;
214: }
1.56 www 215:
1.57 www 216: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 217:
1.59 www 218: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 219: my $handle = &Apache::lonnet::check_for_valid_session($r);
220: if ($handle ne '') {
1.103 raeburn 221: my $lonidsdir=$r->dir_config('lonIDsDir');
222: if ($handle=~/^publicuser\_/) {
223: # For "public user" - remove it, we apparently really want to login
224: unlink($r->dir_config('lonIDsDir')."/$handle.id");
225: } else {
1.59 www 226: # Indeed, a valid token is found
1.103 raeburn 227: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
228: &Apache::loncommon::content_type($r,'text/html');
229: $r->send_http_header;
230: my $start_page =
231: &Apache::loncommon::start_page('Already logged in');
232: my $end_page =
233: &Apache::loncommon::end_page();
1.105 raeburn 234: my $dest = '/adm/roles';
235: if ($env{'form.firsturl'} ne '') {
236: $dest = $env{'form.firsturl'};
237: }
1.103 raeburn 238: $r->print(
239: $start_page
1.121 golterma 240: .'<p class="LC_warning>"'.&mt('You are already logged in!').'</p>'
1.103 raeburn 241: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.105 raeburn 242: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
1.103 raeburn 243: .'</p>'
244: .$end_page
245: );
246: return OK;
247: }
1.59 www 248: }
249:
250: # ---------------------------------------------------- No valid token, continue
251:
252:
1.1 albertel 253: my $buffer;
1.84 albertel 254: if ($r->header_in('Content-length') > 0) {
255: $r->read($buffer,$r->header_in('Content-length'),0);
256: }
1.85 albertel 257: my %form;
258: foreach my $pair (split(/&/,$buffer)) {
259: my ($name,$value) = split(/=/,$pair);
1.7 www 260: $value =~ tr/+/ /;
261: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 262: $form{$name}=$value;
1.1 albertel 263: }
264:
1.85 albertel 265: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
266: &failed($r,'Username, password and domain need to be specified.',
267: \%form);
1.1 albertel 268: return OK;
269: }
1.61 www 270:
271: # split user logging in and "su"-user
272:
1.85 albertel 273: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 274: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
275: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
276: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 277:
278: my $role = $r->dir_config('lonRole');
279: my $domain = $r->dir_config('lonDefDomain');
280: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 281: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 282:
1.8 www 283: # ---------------------------------------- Get the information from login token
284:
1.85 albertel 285: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
286: $form{'serverid'});
1.8 www 287:
1.114 raeburn 288: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
289: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 290: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 291: return OK;
1.44 www 292: } else {
1.85 albertel 293: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
294: $form{'serverid'});
1.77 albertel 295: if ( $reply ne 'ok' ) {
1.85 albertel 296: &failed($r,'Session could not be opened.',\%form);
297: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 298: return OK;
1.44 www 299: }
1.8 www 300: }
1.100 raeburn 301:
1.93 raeburn 302: if (!&Apache::lonnet::domain($form{'udom'})) {
303: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
304: return OK;
305: }
1.100 raeburn 306:
307: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
308: if ($rolestr) {
309: $rolestr = &unescape($rolestr);
310: }
311: if ($symbstr) {
312: $symbstr= &unescape($symbstr);
313: }
314: if ($rolestr =~ /^role=/) {
315: (undef,$form{'role'}) = split('=',$rolestr);
316: }
317: if ($symbstr =~ /^symb=/) {
318: (undef,$form{'symb'}) = split('=',$symbstr);
319: }
1.8 www 320:
321: my $keybin=pack("H16",$key);
322:
1.26 harris41 323: my $cipher;
324: if ($Crypt::DES::VERSION>=2.03) {
325: $cipher=new Crypt::DES $keybin;
326: }
327: else {
328: $cipher=new DES $keybin;
329: }
1.67 www 330: my $upass='';
331: for (my $i=0;$i<=2;$i++) {
332: my $chunk=
1.85 albertel 333: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 334:
1.67 www 335: $chunk.=
1.85 albertel 336: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 337:
1.67 www 338: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
339: $upass.=$chunk;
340: }
1.8 www 341:
1.1 albertel 342: # ---------------------------------------------------------------- Authenticate
1.119 raeburn 343:
1.90 raeburn 344: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.119 raeburn 345: my ($cancreate,$statustocreate) =
346: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
347: my $defaultauth;
348: if (ref($cancreate) eq 'ARRAY') {
349: if (grep(/^login$/,@{$cancreate})) {
350: $defaultauth = 1;
1.90 raeburn 351: }
352: }
1.105 raeburn 353: my $clientcancheckhost = 1;
1.90 raeburn 354: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 355: $form{'udom'},$defaultauth,
356: $clientcancheckhost);
1.1 albertel 357:
358: # --------------------------------------------------------------------- Failed?
359:
360: if ($authhost eq 'no_host') {
1.85 albertel 361: &failed($r,'Username and/or password could not be authenticated.',
362: \%form);
1.1 albertel 363: return OK;
1.90 raeburn 364: } elsif ($authhost eq 'no_account_on_host') {
1.119 raeburn 365: if ($defaultauth) {
1.105 raeburn 366: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 367: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
368: return OK;
369: }
1.90 raeburn 370: my $start_page =
1.121.2.1! raeburn 371: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
! 372: '',{'no_inline_link' => 1,});
1.93 raeburn 373: my $lonhost = $r->dir_config('lonHostID');
374: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
375: my $contacts =
376: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
377: $form{'udom'},$origmail);
378: my ($contact_email) = split(',',$contacts);
1.119 raeburn 379: my $output =
380: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
381: $domdesc,'',$lonhost,
382: $contact_email,$contact_name,
383: undef,$statustocreate);
1.90 raeburn 384: &Apache::loncommon::content_type($r,'text/html');
385: $r->send_http_header;
386: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 387: $r->print('<h3>'.&mt('Account creation').'</h3>'.
388: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
389: $output.&Apache::loncommon::end_page());
1.90 raeburn 390: return OK;
391: } else {
392: &failed($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);
393: return OK;
394: }
1.1 albertel 395: }
396:
1.59 www 397: if (($firsturl eq '') ||
398: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 399: $firsturl='/adm/roles';
1.7 www 400: }
1.61 www 401: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 402: if ($form{'suname'}) {
1.61 www 403: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 404: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 405: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 406: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 407: eq 'no_host') {
1.85 albertel 408: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 409: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 410: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 411: # -------------------------------------------------------- actually switch users
1.85 albertel 412: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
413: ' logging in as '.$form{'suname'});
414: $form{'uname'}=$form{'suname'};
1.61 www 415: } else {
416: &Apache::lonnet::logthis('Attempted switch user to privileged user');
417: }
418: }
419: } else {
420: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
421: }
422: }
1.85 albertel 423:
1.117 raeburn 424: my ($is_balancer,$otherserver) =
425: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
426:
427: if ($is_balancer) {
1.115 raeburn 428: if (!$otherserver) {
1.116 raeburn 429: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 430: }
431: if ($otherserver) {
432: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
433: \%form);
434: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
435: } else {
436: $r->print(&noswitch());
437: }
1.110 raeburn 438: return OK;
1.81 albertel 439: } else {
1.115 raeburn 440: if (!&check_can_host($r,\%form,$authhost)) {
1.118 raeburn 441: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 442: if ($otherserver) {
443: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
444: \%form);
445: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
446: } else {
447: $r->print(&noswitch());
448: }
449: return OK;
450: }
451:
1.109 raeburn 452: # ------------------------------------------------------- Do the load balancing
453:
454: # ---------------------------------------------------------- Determine own load
455: my $loadlim = $r->dir_config('lonLoadLim');
456: my $loadavg;
457: {
458: my $loadfile=Apache::File->new('/proc/loadavg');
459: $loadavg=<$loadfile>;
460: }
461: $loadavg =~ s/\s.*//g;
462: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
463: my $userloadpercent=&Apache::lonnet::userload();
464:
465: # ---------------------------------------------------------- Are we overloaded?
466: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
467: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.115 raeburn 468: if (!$unloaded) {
1.118 raeburn 469: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 470: }
1.109 raeburn 471: if ($unloaded) {
472: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
473: undef,\%form);
474: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 475: return OK;
1.109 raeburn 476: }
477: }
478: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
479: \%form);
1.110 raeburn 480: return OK;
1.81 albertel 481: }
1.1 albertel 482: }
483:
1.105 raeburn 484: sub check_can_host {
485: my ($r,$form,$authhost,$domdesc) = @_;
486: return unless (ref($form) eq 'HASH');
487: my $canhost = 1;
1.106 raeburn 488: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 489: my $udom = $form->{'udom'};
1.108 raeburn 490: my @intdoms;
491: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
492: if (ref($internet_names) eq 'ARRAY') {
493: @intdoms = @{$internet_names};
494: }
1.106 raeburn 495: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
496: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
497: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
498: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
499: my $hostname = &Apache::lonnet::hostname($lonhost);
500: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
501: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
502: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 503: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
504: my $loncaparev;
505: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 506: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 507: } else {
1.106 raeburn 508: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 509: }
1.106 raeburn 510: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
511: $udomdefaults{'remotesessions'},
512: $defdomdefaults{'hostedsessions'});
1.105 raeburn 513: }
514: unless ($canhost) {
515: if ($authhost eq 'no_account_on_host') {
1.115 raeburn 516: my $checkloginvia = 1;
517: my ($login_host,$hostname) =
518: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.105 raeburn 519: &Apache::loncommon::content_type($r,'text/html');
520: $r->send_http_header;
521: if ($login_host ne '') {
522: my $protocol = $Apache::lonnet::protocol{$login_host};
523: $protocol = 'http' if ($protocol ne 'https');
524: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
525: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
526: '<h3>'.&mt('Account creation').'</h3>'.
527: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
528: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
529: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
530: &Apache::loncommon::end_page());
531: } else {
532: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
533: '<h3>'.&mt('Account creation unavailable').'</h3>'.
534: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
535: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
536: &Apache::loncommon::end_page());
537: }
538: } else {
539: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
540: $form);
1.107 raeburn 541: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 542: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
543: }
544: }
1.110 raeburn 545: return $canhost;
1.105 raeburn 546: }
547:
1.115 raeburn 548: sub noswitch {
549: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
550: '<h3>'.&mt('Session unavailable').'</h3>'.
551: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
552: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
553: &Apache::loncommon::end_page();
554: return $result;
555: }
556:
1.1 albertel 557: 1;
558: __END__
1.7 www 559:
560:
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