Annotation of loncom/auth/lonauth.pm, revision 1.101.8.6

1.1       albertel    1: # The LearningOnline Network
                      2: # User Authentication Module
1.27      www         3: #
1.101.8.6! raeburn     4: # $Id: lonauth.pm,v 1.101.8.5 2010/09/24 00:01:44 raeburn 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;
1.101     raeburn    43: use HTML::Entities;
1.85      albertel   44:  
1.1       albertel   45: # ------------------------------------------------------------ Successful login
1.85      albertel   46: sub success {
                     47:     my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
                     48: 	$form) = @_;
1.1       albertel   49: 
1.85      albertel   50: # ------------------------------------------------------------ Get cookie ready
                     51:     my $cookie =
                     52: 	&Apache::loncommon::init_user_environment($r, $username, $domain,
                     53: 						  $authhost, $form,
1.86      albertel   54: 						  {'extra_env' => $extra_env,});
1.4       www        55: 
1.69      albertel   56:     my $public=($username eq 'public' && $domain eq 'public');
                     57: 
1.85      albertel   58:     if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78      albertel   59: 
1.7       www        60: # -------------------------------------------------------------------- Log this
                     61: 
                     62:     &Apache::lonnet::log($domain,$username,$authhost,
                     63:                          "Login $ENV{'REMOTE_ADDR'}");
1.4       www        64: 
1.14      www        65: # ------------------------------------------------- Check for critical messages
                     66: 
1.21      www        67:     my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14      www        68:     if ($what[0]) {
1.22      www        69: 	if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21      www        70: 	    $lowerurl='/adm/email?critical=display';
1.14      www        71:         }
                     72:     }
                     73: 
1.5       www        74: # ------------------------------------------------------------ Get cookie ready
1.1       albertel   75:     $cookie="lonID=$cookie; path=/";
1.12      www        76: # -------------------------------------------------------- Menu script and info
1.100     raeburn    77:     my $destination = $lowerurl;
                     78: 
                     79:     if (defined($form->{role})) {
                     80:         my $envkey = 'user.role.'.$form->{role};
                     81:         my $now=time;
                     82:         my $then=$env{'user.login.time'};
                     83:         my $refresh=$env{'user.refresh.time'};
                     84:         if (exists($env{$envkey})) {
                     85:             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
                     86:             &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
                     87:                                          \$trolecode,\$tstatus,\$tstart,\$tend);
                     88:             if ($tstatus eq 'is') {
1.101     raeburn    89:                 $destination  .= ($destination =~ /\?/) ? '&' : '?';
                     90:                 my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                     91:                 $destination .= 'selectrole=1&'.$newrole.'=1';
1.100     raeburn    92:             }
                     93:         }
                     94:     }
1.101     raeburn    95:     if (defined($form->{symb})) {
                     96:         my $destsymb = $form->{symb};
                     97:         $destination  .= ($destination =~ /\?/) ? '&' : '?';
                     98:         if ($destsymb =~ /___/) {
                     99:             # FIXME Need to deal with encrypted symbs and urls as needed.
                    100:             my ($map,$resid,$desturl)=split(/___/,$destsymb);
                    101:             unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
                    102:                 $desturl = &Apache::lonnet::clutter($desturl);
                    103:             }
                    104:             $desturl = &HTML::Entities::encode($desturl,'"<>&');
                    105:             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
                    106:             $destination .= '&destinationurl='.$desturl.
                    107:                             '&destsymb='.$destsymb;
                    108:         } else {
                    109:             $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
                    110:             $destination .= '&destinationurl='.$destsymb;
                    111:         }
                    112:     }
1.100     raeburn   113: 
1.85      albertel  114:     my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
1.100     raeburn   115:     my $startupremote=&Apache::lonmenu::startupremote($destination);
1.63      albertel  116:     my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35      www       117:     my $setflags=&Apache::lonmenu::setflags();
                    118:     my $maincall=&Apache::lonmenu::maincall();
1.99      bisitz    119:     my $brcrum = [{'href' => '',
                    120:                    'text' => 'Successful Login'},];
1.74      albertel  121:     my $start_page=&Apache::loncommon::start_page('Successful Login',
1.99      bisitz    122:                                                   $startupremote,
                    123:                                                   {'no_inline_link' => 1,
                    124:                                                    'bread_crumbs' => $brcrum,});
1.74      albertel  125:     my $end_page  =&Apache::loncommon::end_page();
                    126: 
1.64      albertel  127:     my $continuelink;
1.98      www       128:     if ($env{'environment.remote'} eq 'off') {
1.100     raeburn   129: 	$continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
1.64      albertel  130:     }
1.5       www       131: # ------------------------------------------------- Output for successful login
                    132: 
1.74      albertel  133:     &Apache::loncommon::content_type($r,'text/html');
                    134:     $r->header_out('Set-cookie' => $cookie);
                    135:     $r->send_http_header;
1.1       albertel  136: 
1.58      www       137:     my %lt=&Apache::lonlocal::texthash(
                    138: 				       'wel' => 'Welcome',
1.92      bisitz    139: 				       'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
                    140: 				       'pro' => 'Login problems?',
1.58      www       141: 				       'log' => 'loginproblems.html',
                    142: 				       );
1.1       albertel  143:     $r->print(<<ENDSUCCESS);
1.74      albertel  144: $start_page
1.35      www       145: $setflags
1.19      www       146: $windowinfo
1.58      www       147: <h1>$lt{'wel'}</h1>
1.92      bisitz    148: $lt{'mes'}<p>
                    149: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
1.63      albertel  150: $remoteinfo
1.35      www       151: $maincall
1.64      albertel  152: $continuelink
1.74      albertel  153: $end_page
1.1       albertel  154: ENDSUCCESS
                    155: }
                    156: 
                    157: # --------------------------------------------------------------- Failed login!
                    158: 
                    159: sub failed {
1.85      albertel  160:     my ($r,$message,$form) = @_;
1.76      albertel  161:     my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
                    162: 						    {'no_inline_link' => 1,});
1.100     raeburn   163:     my $retry = '/adm/login?username='.$form->{'uname'}.
                    164:                 '&domain='.$form->{'udom'};
                    165:     if (exists($form->{role})) {
                    166:         $retry .= '&role='.$form->{role};
                    167:     }
                    168:     if (exists($form->{symb})) {
                    169:         $retry .= '&symb='.$form->{symb};
                    170:     }
1.74      albertel  171:     my $end_page   = &Apache::loncommon::end_page();
                    172:     &Apache::loncommon::content_type($r,'text/html');
                    173:     $r->send_http_header;
1.92      bisitz    174:     $r->print(
                    175:        $start_page
                    176:       .'<h1>'.&mt('Sorry ...').'</h1>'
1.95      bisitz    177:       .'<p class="LC_warning">'.&mt($message).'</p>'
1.100     raeburn   178:       .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92      bisitz    179:       .'</p>'
                    180:       .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
                    181:       .$end_page
                    182:     );
                    183:  }
1.60      www       184: 
1.55      www       185: # ------------------------------------------------------------------ Rerouting!
                    186: 
                    187: sub reroute {
1.74      albertel  188:     my ($r) = @_;
                    189:     &Apache::loncommon::content_type($r,'text/html');
                    190:     $r->send_http_header;
1.92      bisitz    191:     my $msg='<h1>'.&mt('Sorry ...').'</h1>'
                    192:            .&mt('Please [_1]log in again[_2].');
1.74      albertel  193:     &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55      www       194: }
                    195: 
1.1       albertel  196: # ---------------------------------------------------------------- Main handler
                    197: 
                    198: sub handler {
                    199:     my $r = shift;
1.85      albertel  200:     my $form;
1.55      www       201: # Are we re-routing?
                    202:     if (-e '/home/httpd/html/lon-status/reroute.txt') {
                    203: 	&reroute($r);
                    204: 	return OK;
                    205:     }
1.56      www       206: 
1.57      www       207:     &Apache::lonlocal::get_language_handle($r);
1.1       albertel  208: 
1.59      www       209: # -------------------------------- Prevent users from attempting to login twice
1.89      albertel  210:     my $handle = &Apache::lonnet::check_for_valid_session($r);
                    211:     if ($handle ne '') {
1.101.8.1  raeburn   212:         my $lonidsdir=$r->dir_config('lonIDsDir');
                    213:         if ($handle=~/^publicuser\_/) {
                    214: # For "public user" - remove it, we apparently really want to login
                    215:             unlink($r->dir_config('lonIDsDir')."/$handle.id");
                    216:         } else {
1.59      www       217: # Indeed, a valid token is found
1.101.8.1  raeburn   218:             &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
                    219:             &Apache::loncommon::content_type($r,'text/html');
                    220:             $r->send_http_header;
                    221:             my $start_page =
                    222:                 &Apache::loncommon::start_page('Already logged in');
                    223:             my $end_page =
                    224:                 &Apache::loncommon::end_page();
                    225:             my $dest = '/adm/roles';
                    226:             if ($env{'form.firsturl'} ne '') {
                    227:                 $dest = $env{'form.firsturl'};
                    228:             }
                    229:             $r->print(
                    230:                $start_page
                    231:               .'<h1>'.&mt('You are already logged in!').'</h1>'
                    232:               .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
                    233:                     ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
                    234:               .'</p>'
                    235:               .$end_page
                    236:             );
                    237:             return OK;
                    238:         }
1.59      www       239:     }
                    240: 
                    241: # ---------------------------------------------------- No valid token, continue
                    242: 
                    243: 
1.1       albertel  244:     my $buffer;
1.84      albertel  245:     if ($r->header_in('Content-length') > 0) {
                    246: 	$r->read($buffer,$r->header_in('Content-length'),0);
                    247:     }
1.85      albertel  248:     my %form;
                    249:     foreach my $pair (split(/&/,$buffer)) {
                    250:        my ($name,$value) = split(/=/,$pair);
1.7       www       251:        $value =~ tr/+/ /;
                    252:        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85      albertel  253:        $form{$name}=$value;
1.1       albertel  254:     } 
                    255: 
1.85      albertel  256:     if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
                    257: 	&failed($r,'Username, password and domain need to be specified.',
                    258: 		\%form);
1.1       albertel  259:         return OK;
                    260:     }
1.61      www       261: 
                    262: # split user logging in and "su"-user
                    263: 
1.85      albertel  264:     ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87      albertel  265:     $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
                    266:     $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
                    267:     $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
1.1       albertel  268: 
                    269:     my $role   = $r->dir_config('lonRole');
                    270:     my $domain = $r->dir_config('lonDefDomain');
                    271:     my $prodir = $r->dir_config('lonUsersDir');
1.93      raeburn   272:     my $contact_name = &mt('LON-CAPA helpdesk');
1.1       albertel  273: 
1.8       www       274: # ---------------------------------------- Get the information from login token
                    275: 
1.85      albertel  276:     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                    277:                                       $form{'serverid'});
1.8       www       278: 
                    279:     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.85      albertel  280: 	&failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8       www       281:         return OK;
1.44      www       282:     } else {
1.85      albertel  283: 	my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
                    284: 					   $form{'serverid'});
1.77      albertel  285:         if ( $reply ne 'ok' ) {
1.85      albertel  286:             &failed($r,'Session could not be opened.',\%form);
                    287: 	    &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77      albertel  288: 	    return OK;
1.44      www       289: 	}
1.8       www       290:     }
1.100     raeburn   291: 
1.93      raeburn   292:     if (!&Apache::lonnet::domain($form{'udom'})) {
                    293:         &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
                    294:         return OK;
                    295:     }
1.100     raeburn   296: 
                    297:     my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
                    298:     if ($rolestr) {
                    299:         $rolestr = &unescape($rolestr);
                    300:     }
                    301:     if ($symbstr) {
                    302:         $symbstr= &unescape($symbstr);
                    303:     }
                    304:     if ($rolestr =~ /^role=/) {
                    305:         (undef,$form{'role'}) = split('=',$rolestr);
                    306:     }
                    307:     if ($symbstr =~ /^symb=/) { 
                    308:         (undef,$form{'symb'}) = split('=',$symbstr);
                    309:     }
1.8       www       310: 
                    311:     my $keybin=pack("H16",$key);
                    312: 
1.26      harris41  313:     my $cipher;
                    314:     if ($Crypt::DES::VERSION>=2.03) {
                    315: 	$cipher=new Crypt::DES $keybin;
                    316:     }
                    317:     else {
                    318: 	$cipher=new DES $keybin;
                    319:     }
1.67      www       320:     my $upass='';
                    321:     for (my $i=0;$i<=2;$i++) {
                    322: 	my $chunk=
1.85      albertel  323: 	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8       www       324: 
1.67      www       325: 	$chunk.=
1.85      albertel  326: 	    $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8       www       327: 
1.67      www       328: 	$chunk=substr($chunk,1,ord(substr($chunk,0,1)));
                    329: 	$upass.=$chunk;
                    330:     }
1.8       www       331: 
1.1       albertel  332: # ---------------------------------------------------------------- Authenticate
1.91      raeburn   333:     my @cancreate;
1.90      raeburn   334:     my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
                    335:     if (ref($domconfig{'usercreation'}) eq 'HASH') {
                    336:         if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
1.91      raeburn   337:             if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
                    338:                 @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
                    339:             } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 
                    340:                      ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
                    341:                 @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
1.90      raeburn   342:             }
                    343:         }
                    344:     }
                    345:     my $defaultauth;
1.91      raeburn   346:     if (grep(/^login$/,@cancreate)) {
1.90      raeburn   347:         $defaultauth = 1;
                    348:     }
1.101.8.2  raeburn   349:     my $clientcancheckhost = 1;
1.90      raeburn   350:     my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.101.8.2  raeburn   351:                                               $form{'udom'},$defaultauth,
                    352:                                               $clientcancheckhost);
1.1       albertel  353:     
                    354: # --------------------------------------------------------------------- Failed?
                    355: 
                    356:     if ($authhost eq 'no_host') {
1.85      albertel  357: 	&failed($r,'Username and/or password could not be authenticated.',
                    358: 		\%form);
1.1       albertel  359:         return OK;
1.90      raeburn   360:     } elsif ($authhost eq 'no_account_on_host') {
                    361:         my %domconfig = 
                    362:             &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.91      raeburn   363:         if (grep(/^login$/,@cancreate)) {
1.101.8.2  raeburn   364:             my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.101.8.5  raeburn   365:             unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
                    366:                 return OK;     
                    367:             }
1.90      raeburn   368:             my $start_page = 
                    369:                 &Apache::loncommon::start_page('Create a user account in LON-CAPA',
                    370:                                                '',{'no_inline_link'   => 1,});
1.93      raeburn   371:             my $lonhost = $r->dir_config('lonHostID');
                    372:             my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
                    373:             my $contacts = 
                    374:                 &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                    375:                                                         $form{'udom'},$origmail);
                    376:             my ($contact_email) = split(',',$contacts); 
1.94      raeburn   377:             my $output = &Apache::createaccount::username_check($form{'uname'}, 
                    378:                                                                 $form{'udom'},$domdesc,'',
                    379:                                                                 $lonhost,$contact_email,$contact_name);
1.90      raeburn   380:             &Apache::loncommon::content_type($r,'text/html');
                    381:             $r->send_http_header;
                    382:             &Apache::createaccount::print_header($r,$start_page);
1.94      raeburn   383:             $r->print('<h3>'.&mt('Account creation').'</h3>'.
                    384:                       &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
                    385:                       $output.&Apache::loncommon::end_page());
1.90      raeburn   386:             return OK;
                    387:         } else {
                    388:             &failed($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);
                    389:             return OK;
                    390:         }
1.1       albertel  391:     }
                    392: 
1.59      www       393:     if (($firsturl eq '') || 
                    394: 	($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24      www       395: 	$firsturl='/adm/roles';
1.7       www       396:     }
1.61      www       397: # --------------------------------- Are we attempting to login as somebody else?
1.85      albertel  398:     if ($form{'suname'}) {
1.61      www       399: # ------------ see if the original user has enough privileges to pull this stunt
1.85      albertel  400: 	if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61      www       401: # ---------------------------------------------------- see if the su-user exists
1.85      albertel  402: 	    unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61      www       403: 		eq 'no_host') {
1.85      albertel  404: 		&Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61      www       405: # ------------------------------ see if the su-user is not too highly privileged
1.85      albertel  406: 		unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61      www       407: # -------------------------------------------------------- actually switch users
1.85      albertel  408: 		    &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
                    409: 			' logging in as '.$form{'suname'});
                    410: 		    $form{'uname'}=$form{'suname'};
1.61      www       411: 		} else {
                    412: 		    &Apache::lonnet::logthis('Attempted switch user to privileged user');
                    413: 		}
                    414: 	    }
                    415: 	} else {
                    416: 	    &Apache::lonnet::logthis('Non-privileged user attempting switch user');
                    417: 	}
                    418:     }
1.85      albertel  419: 
1.101.8.5  raeburn   420:     unless (&check_can_host($r,\%form,$authhost)) {
                    421:         return OK;
                    422:     }
1.101.8.2  raeburn   423: 
1.81      albertel  424:     if ($r->dir_config("lonBalancer") eq 'yes') {
1.85      albertel  425: 	&success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                    426: 		 \%form);
1.101.8.6! raeburn   427:         my $otherserver = &Apache::lonnet::spareserver(30000,undef,1,$form{'udom'});
1.101.8.4  raeburn   428: 	$r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
1.101.8.5  raeburn   429:         return OK;
1.81      albertel  430:     } else {
1.101.8.4  raeburn   431: # ------------------------------------------------------- Do the load balancing
                    432: 
                    433: # ---------------------------------------------------------- Determine own load
                    434:         my $loadlim = $r->dir_config('lonLoadLim');
                    435:         my $loadavg;
                    436:         {
                    437:             my $loadfile=Apache::File->new('/proc/loadavg');
                    438:             $loadavg=<$loadfile>;
                    439:         }
                    440:         $loadavg =~ s/\s.*//g;
                    441:         my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
                    442:         my $userloadpercent=&Apache::lonnet::userload();
                    443: 
                    444: # ---------------------------------------------------------- Are we overloaded?
                    445:         if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
                    446:             my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
                    447:             if ($unloaded) {
                    448:                 &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                    449:                          undef,\%form);
                    450:                 $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.101.8.5  raeburn   451:                 return OK;
1.101.8.4  raeburn   452:             }
                    453:         }
                    454:         &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    455:                  \%form);
1.101.8.5  raeburn   456:         return OK;
1.81      albertel  457:     }
1.1       albertel  458: }
                    459: 
1.101.8.2  raeburn   460: sub check_can_host {
                    461:     my ($r,$form,$authhost,$domdesc) = @_;
                    462:     return unless (ref($form) eq 'HASH');
                    463:     my $canhost = 1;
                    464:     my $lonhost = $r->dir_config('lonHostID');
                    465:     my $udom = $form->{'udom'};
1.101.8.3  raeburn   466:     my @intdoms;
                    467:     my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
                    468:     if (ref($internet_names) eq 'ARRAY') {
                    469:         @intdoms = @{$internet_names};
                    470:     }
1.101.8.2  raeburn   471:     my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
                    472:     my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
                    473:     unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
                    474:         my $machine_dom = &Apache::lonnet::host_domain($lonhost);
                    475:         my $hostname = &Apache::lonnet::hostname($lonhost);
                    476:         my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
                    477:         my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
                    478:         my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
                    479:         my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
                    480:         my $loncaparev;
                    481:         if ($authhost eq 'no_account_on_host') {
                    482:             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
                    483:         } else {
                    484:             $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
                    485:         }
                    486:         $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
                    487:                                                      $udomdefaults{'remotesessions'},
                    488:                                                      $defdomdefaults{'hostedsessions'});
                    489:     }
                    490:     unless ($canhost) {
                    491:         if ($authhost eq 'no_account_on_host') {
                    492:             my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);
                    493:             &Apache::loncommon::content_type($r,'text/html');
                    494:             $r->send_http_header;
                    495:             if ($login_host ne '') {
                    496:                 my $protocol = $Apache::lonnet::protocol{$login_host};
                    497:                 $protocol = 'http' if ($protocol ne 'https');
                    498:                 my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
                    499:                 $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                    500:                           '<h3>'.&mt('Account creation').'</h3>'.
                    501:                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                    502:                           '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
                    503:                           '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
                    504:                           &Apache::loncommon::end_page());
                    505:             } else {
                    506:                 $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                    507:                           '<h3>'.&mt('Account creation unavailable').'</h3>'.
                    508:                           &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                    509:                           '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
                    510:                           &Apache::loncommon::end_page());
                    511:             }
                    512:         } else {
                    513:             &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                    514:                      $form);
                    515:             my ($otherserver) = &Apache::lonnet::choose_server($udom);
                    516:             $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
                    517:         }
                    518:     }
1.101.8.5  raeburn   519:     return $canhost;
1.101.8.2  raeburn   520: }
                    521: 
1.1       albertel  522: 1;
                    523: __END__
1.7       www       524: 
                    525: 

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