--- loncom/auth/lonauth.pm 2000/10/30 22:41:55 1.16 +++ loncom/auth/lonauth.pm 2014/10/04 13:21:48 1.121.2.12 @@ -1,102 +1,62 @@ # The LearningOnline Network # User Authentication Module -# 5/21/99,5/22,5/25,5/26,5/27,5/29,6/2,6/11,6/14,6/15 -# 16/11,12/16, -# 1/14,2/24,2/28,2/29,3/7,5/29,5/30,5/31,6/1,6/5,6/29, -# 7/1,7/10,10/2,10/5,10/9,10/26,10/30 Gerd Kortemeyer +# +# $Id: lonauth.pm,v 1.121.2.12 2014/10/04 13:21:48 raeburn Exp $ +# +# Copyright Michigan State University Board of Trustees +# +# This file is part of the LearningOnline Network with CAPA (LON-CAPA). +# +# LON-CAPA is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# LON-CAPA is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with LON-CAPA; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# /home/httpd/html/adm/gpl.txt +# +# http://www.lon-capa.org/ +# package Apache::lonauth; +use strict; +use LONCAPA; use Apache::Constants qw(:common); -use Apache::File; use CGI qw(:standard); -use CGI::Cookie(); +use DynaLoader; # for Crypt::DES version use Crypt::DES; -use Apache::lonnet(); +use Apache::loncommon(); +use Apache::lonnet; use Apache::lonmenu(); - +use Apache::createaccount; +use Fcntl qw(:flock); +use Apache::lonlocal; +use Apache::File(); +use HTML::Entities; + # ------------------------------------------------------------ Successful login - sub success { - my ($r, $username, $domain, $authhost,$lowerurl) = @_; - my $lonids=$r->dir_config('lonIDsDir'); + my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, + $form) = @_; -# See if old ID present, if so, remove - my $cookie; - while ($cookie=<$lonids/$username\_*\_$domain\_$authhost.id>) { - unlink($cookie); - } - -# Give them a new cookie - - my $now=time; - $cookie="$username\_$now\_$domain\_$authhost"; - -# Initialize roles - - my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost); - -# ------------------------------------ Check browser type and MathML capability - - my @browsertype=split(/\&/,$r->dir_config("lonBrowsDet")); - my %mathcap=split(/\&/,$r->dir_config("lonMathML")); - my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; - my $i; - my $clientbrowser='unknown'; - my $clientversion='0'; - my $clientmathml=''; - for ($i=0;$i<=$#browsertype;$i++) { - my ($bname,$match,$notmatch,$vreg,$minv)=split(/\:/,$browsertype[$i]); - if (($httpbrowser=~/$match/i) && ($httpbrowser!~/$notmatch/i)) { - $clientbrowser=$bname; - $httpbrowser=~/$vreg/i; - $clientversion=$1; - $clientmathml=($clientversion>=$minv); - } - } - my $clientos='unknown'; - if (($httpbrowser=~/linux/i) || - ($httpbrowser=~/unix/i) || - ($httpbrowser=~/ux/i) || - ($httpbrowser=~/solaris/i)) { $clientos='unix'; } - if (($httpbrowser=~/vax/i) || - ($httpbrowser=~/vms/i)) { $clientos='vms'; } - if ($httpbrowser=~/next/i) { $clientos='next'; } - if (($httpbrowser=~/mac/i) || - ($httpbrowser=~/powerpc/i)) { $clientos='mac'; } - if ($httpbrowser=~/win/i) { $clientos='win'; } - -# ------------------------------------------------------------- Get environment - - my $userenv=Apache::lonnet::reply("dump:$domain:$username:environment", - $authhost); - if (($userenv eq 'con_lost') || - ($userenv =~ /^error\:/)) { - $userenv=''; - } - $userenv=~s/\&/\nenvironment\./g; - if ($userenv ne '') { - $userenv='environment.'.$userenv; - } -# --------------------------------------------------------- Write first profile - - { - my $idf=Apache::File->new(">$lonids/$cookie.id"); - if ($userenv ne '') { print $idf "$userenv\n"; } - print $idf "user.name=$username\n"; - print $idf "user.domain=$domain\n"; - print $idf "user.home=$authhost\n"; - print $idf "browser.type=$clientbrowser\n"; - print $idf "browser.version=$clientversion\n"; - print $idf "browser.mathml=$clientmathml\n"; - print $idf "browser.os=$clientos\n"; - print $idf "request.course.fn=\n"; - print $idf "request.course.uri=\n"; - print $idf "request.course.sec=\n"; - print $idf "request.role=cm\n"; - print $idf "request.host=$ENV{'HTTP_HOST'}\n"; - if ($userroles ne '') { print $idf "$userroles"; } - } +# ------------------------------------------------------------ Get cookie ready + my $cookie = + &Apache::loncommon::init_user_environment($r, $username, $domain, + $authhost, $form, + {'extra_env' => $extra_env,}); + + my $public=($username eq 'public' && $domain eq 'public'); + + if ($public or $lowerurl eq 'noredirect') { return $cookie; } # -------------------------------------------------------------------- Log this @@ -105,131 +65,595 @@ sub success { # ------------------------------------------------- Check for critical messages - my @what=&Apache::lonnet::dump('critical'); + my @what=&Apache::lonnet::dump('critical',$domain,$username); if ($what[0]) { - if ($what[0] ne 'con_lost') { - $lowerurl='/adm/email/critical/'.$what[0]; + if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { + $lowerurl='/adm/email?critical=display'; } } # ------------------------------------------------------------ Get cookie ready - $cookie="lonID=$cookie; path=/"; # -------------------------------------------------------- Menu script and info + my $destination = $lowerurl; - my $windowinfo=&Apache::lonmenu::open(); + if (defined($form->{role})) { + my $envkey = 'user.role.'.$form->{role}; + my $now=time; + my $then=$env{'user.login.time'}; + my $refresh=$env{'user.refresh.time'}; + my $update=$env{'user.update.time'}; + if (!$update) { + $update = $then; + } + if (exists($env{$envkey})) { + my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus); + &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where, + \$trolecode,\$tstatus,\$tstart,\$tend); + if ($tstatus eq 'is') { + $destination .= ($destination =~ /\?/) ? '&' : '?'; + my $newrole = &HTML::Entities::encode($form->{role},'"<>&'); + $destination .= 'selectrole=1&'.$newrole.'=1'; + } + } + } + if (defined($form->{symb})) { + my $destsymb = $form->{symb}; + $destination .= ($destination =~ /\?/) ? '&' : '?'; + if ($destsymb =~ /___/) { + # FIXME Need to deal with encrypted symbs and urls as needed. + my ($map,$resid,$desturl)=split(/___/,$destsymb); + unless ($desturl=~/^(adm|editupload|public)/) { + $desturl = &Apache::lonnet::clutter($desturl); + } + $desturl = &HTML::Entities::encode($desturl,'"<>&'); + $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); + $destination .= 'destinationurl='.$desturl. + '&destsymb='.$destsymb; + } else { + $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); + $destination .= 'destinationurl='.$destsymb; + } + } + if ($destination =~ m{^/adm/roles}) { + $destination .= ($destination =~ /\?/) ? '&' : '?'; + $destination .= 'source=login'; + } + + my $windowinfo=&Apache::lonmenu::open($env{'browser.os'}); + my $startupremote=&Apache::lonmenu::startupremote($destination); + my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl); + my $setflags=&Apache::lonmenu::setflags(); + my $maincall=&Apache::lonmenu::maincall(); + my $brcrum = [{'href' => '', + 'text' => 'Successful Login'},]; + my $start_page=&Apache::loncommon::start_page('Successful Login', + $startupremote, + {'no_inline_link' => 1, + 'bread_crumbs' => $brcrum,}); + my $end_page =&Apache::loncommon::end_page(); + + my $continuelink; + if ($env{'environment.remote'} eq 'off') { + $continuelink=''.&mt('Continue').''; + } # ------------------------------------------------- Output for successful login - $r->send_cgi_header(<header_out('Set-cookie' => $cookie); + $r->send_http_header; + + my %lt=&Apache::lonlocal::texthash( + 'wel' => 'Welcome', + 'pro' => 'Login problems?', + ); + my $loginhelp = &loginhelpdisplay($domain); + if ($loginhelp) { + $loginhelp = '

'.$lt{'pro'}.'

'; + } -ENDHEADER + my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','',''); $r->print(< - -Successful Login to the LearningOnline Network with CAPA - - - - $windowinfo -

Welcome!

- - +$start_page +$setflags +$windowinfo +

$lt{'wel'}

+$welcome +$loginhelp +$remoteinfo +$maincall +$continuelink +$end_page ENDSUCCESS + return; } # --------------------------------------------------------------- Failed login! sub failed { - my ($r,$message) = @_; - $r->send_cgi_header(<print(< - -Unsuccessful Login to the LearningOnline Network with CAPA - - - -

Sorry ...

-

$message to use the LearningOnline Network with CAPA

- - -ENDFAILED + my ($r,$message,$form) = @_; + (undef,undef,undef,my $clientmathml,my $clientunicode) = + &Apache::loncommon::decode_user_agent(); + my $args = {}; + if ($clientunicode && !$clientmathml) { + $args = {'browser.unicode' => 1}; + } + + my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args); + my $uname = &Apache::loncommon::cleanup_html($form->{'uname'}); + my $udom = &Apache::loncommon::cleanup_html($form->{'udom'}); + if (&Apache::lonnet::domain($udom,'description') eq '') { + undef($udom); + } + my $retry = '/adm/login'; + if ($uname eq $form->{'uname'}) { + $retry .= '?username='.$uname; + } + if ($udom) { + $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom; + } + if (exists($form->{role})) { + my $role = &Apache::loncommon::cleanup_html($form->{role}); + if ($role ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'role='.$role; + } + } + if (exists($form->{symb})) { + my $symb = &Apache::loncommon::cleanup_html($form->{symb}); + if ($symb ne '') { + $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb; + } + } + my $end_page = &Apache::loncommon::end_page(); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + my @actions = + (&mt('Please [_1]log in again[_2].','','')); + my $loginhelp = &loginhelpdisplay($udom); + if ($loginhelp) { + push(@actions, ''.&mt('Login problems?').''); + } + #FIXME: link to helpdesk might be added here + + $r->print( + $start_page + .'

'.&mt('Sorry ...').'

' + .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'

' + .&Apache::lonhtmlcommon::actionbox(\@actions) + .$end_page + ); + } + +# ------------------------------------------------------------------ Rerouting! + +sub reroute { + my ($r) = @_; + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + my $msg=''.&mt('Sorry ...').'
' + .&mt('Please [_1]log in again[_2].'); + &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1}); } # ---------------------------------------------------------------- Main handler sub handler { my $r = shift; + my $londocroot = $r->dir_config('lonDocRoot'); + my $form; +# Are we re-routing? + if (-e "$londocroot/lon-status/reroute.txt") { + &reroute($r); + return OK; + } + + &Apache::lonlocal::get_language_handle($r); + +# -------------------------------- Prevent users from attempting to login twice + my $handle = &Apache::lonnet::check_for_valid_session($r); + if ($handle ne '') { + my $lonidsdir=$r->dir_config('lonIDsDir'); + if ($handle=~/^publicuser\_/) { +# For "public user" - remove it, we apparently really want to login + unlink($r->dir_config('lonIDsDir')."/$handle.id"); + } else { +# Indeed, a valid token is found + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + my $start_page = + &Apache::loncommon::start_page('Already logged in'); + my $end_page = + &Apache::loncommon::end_page(); + my $dest = '/adm/roles'; + if ($env{'form.firsturl'} ne '') { + $dest = $env{'form.firsturl'}; + } + $r->print( + $start_page + .'

'.&mt('You are already logged in!').'

' + .'

'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' + ,'','','','') + .'

' + .$end_page + ); + return OK; + } + } + +# ---------------------------------------------------- No valid token, continue + my $buffer; - $r->read($buffer,$r->header_in('Content-length')); - my @pairs=split(/&/,$buffer); - my $pair; my $name; my $value; my %FORM; - foreach $pair (@pairs) { - ($name,$value) = split(/=/,$pair); + if ($r->header_in('Content-length') > 0) { + $r->read($buffer,$r->header_in('Content-length'),0); + } + my %form; + foreach my $pair (split(/&/,$buffer)) { + my ($name,$value) = split(/=/,$pair); $value =~ tr/+/ /; $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; - $FORM{$name}=$value; - } + $form{$name}=$value; + } - if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) { - failed($r,'Username, password and domain need to be specified'); + if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { + &failed($r,'Username, password and domain need to be specified.', + \%form); return OK; } - $FORM{'uname'} =~ s/\W//g; - $FORM{'udom'} =~ s/\W//g; + +# split user logging in and "su"-user + + ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); + $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); + $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); + $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); my $role = $r->dir_config('lonRole'); my $domain = $r->dir_config('lonDefDomain'); my $prodir = $r->dir_config('lonUsersDir'); + my $contact_name = &mt('LON-CAPA helpdesk'); # ---------------------------------------- Get the information from login token - my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'}, - $FORM{'serverid'}); + my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, + $form{'serverid'}); - if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { - failed($r,'Login token missing, inaccessible or expired'); + if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || + ($tmpinfo eq 'no_such_host')) { + &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); return OK; + } else { + my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, + $form{'serverid'}); + if ( $reply ne 'ok' ) { + &failed($r,'Session could not be opened.',\%form); + &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); + return OK; + } } - - my ($key,$firsturl)=split(/&/,$tmpinfo); - my $keybin=pack("H16",$key); + if (!&Apache::lonnet::domain($form{'udom'})) { + &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); + return OK; + } + + my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo); + if ($rolestr) { + $rolestr = &unescape($rolestr); + } + if ($symbstr) { + $symbstr= &unescape($symbstr); + } + if ($iptokenstr) { + $iptokenstr = &unescape($iptokenstr); + } + if ($rolestr =~ /^role=/) { + (undef,$form{'role'}) = split('=',$rolestr); + } + if ($symbstr =~ /^symb=/) { + (undef,$form{'symb'}) = split('=',$symbstr); + } + if ($iptokenstr =~ /^iptoken=/) { + (undef,$form{'iptoken'}) = split('=',$iptokenstr); + } - my $cipher=new DES $keybin; + my $keybin=pack("H16",$key); - my $upass=$cipher->decrypt( - unpack("a8",pack("H16",substr($FORM{'upass'},0,16)))); + my $cipher; + if ($Crypt::DES::VERSION>=2.03) { + $cipher=new Crypt::DES $keybin; + } + else { + $cipher=new DES $keybin; + } + my $upass=''; + for (my $i=0;$i<=2;$i++) { + my $chunk= + $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); - $upass.=$cipher->decrypt( - unpack("a8",pack("H16",substr($FORM{'upass'},16,16)))); + $chunk.= + $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); - $upass=substr($upass,1,ord(substr($upass,0,1))); + $chunk=substr($chunk,1,ord(substr($chunk,0,1))); + $upass.=$chunk; + } # ---------------------------------------------------------------- Authenticate - my $authhost=Apache::lonnet::authenticate($FORM{'uname'}, - $upass, - $FORM{'udom'}); + + my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); + my ($cancreate,$statustocreate) = + &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'}); + my $defaultauth; + if (ref($cancreate) eq 'ARRAY') { + if (grep(/^login$/,@{$cancreate})) { + $defaultauth = 1; + } + } + my $clientcancheckhost = 1; + my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, + $form{'udom'},$defaultauth, + $clientcancheckhost); # --------------------------------------------------------------------- Failed? if ($authhost eq 'no_host') { - failed($r,'Username and/or password could not be authenticated'); + &failed($r,'Username and/or password could not be authenticated.', + \%form); return OK; + } elsif ($authhost eq 'no_account_on_host') { + if ($defaultauth) { + my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); + unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { + return OK; + } + my $start_page = + &Apache::loncommon::start_page('Create a user account in LON-CAPA', + '',{'no_inline_link' => 1,}); + my $lonhost = $r->dir_config('lonHostID'); + my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; + my $contacts = + &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', + $form{'udom'},$origmail); + my ($contact_email) = split(',',$contacts); + my $output = + &Apache::createaccount::username_check($form{'uname'},$form{'udom'}, + $domdesc,'',$lonhost, + $contact_email,$contact_name, + undef,$statustocreate); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + &Apache::createaccount::print_header($r,$start_page); + $r->print('

'.&mt('Account creation').'

'. + &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'
'. + $output.&Apache::loncommon::end_page()); + return OK; + } else { + &failed($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); + return OK; + } } - if (($firsturl eq '') || ($firsturl eq '/adm/logout')) { - $firsturl='/res/adm/pages/index.html'; + if (($firsturl eq '') || + ($firsturl=~/^\/adm\/(logout|remote)/)) { + $firsturl='/adm/roles'; } - success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl); - return OK; + my $hosthere; + if ($form{'iptoken'}) { + my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'}); + my $delete = &Apache::lonnet::tmpdel($form{'iptoken'}); + if (($sessiondata{'domain'} eq $form{'udom'}) && + ($sessiondata{'username'} eq $form{'uname'})) { + $hosthere = 1; + } + } + +# --------------------------------- Are we attempting to login as somebody else? + if ($form{'suname'}) { +# ------------ see if the original user has enough privileges to pull this stunt + if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { +# ---------------------------------------------------- see if the su-user exists + unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) + eq 'no_host') { + &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); +# ------------------------------ see if the su-user is not too highly privileged + unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { +# -------------------------------------------------------- actually switch users + &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. + ' logging in as '.$form{'suname'}); + $form{'uname'}=$form{'suname'}; + } else { + &Apache::lonnet::logthis('Attempted switch user to privileged user'); + } + } + } else { + &Apache::lonnet::logthis('Non-privileged user attempting switch user'); + } + } + + my ($is_balancer,$otherserver); + + unless ($hosthere) { + ($is_balancer,$otherserver) = + &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); + } + + if ($is_balancer) { + if (!$otherserver) { + ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); + } + if ($otherserver) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, + \%form); + my $switchto = '/adm/switchserver?otherserver='.$otherserver; + if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { + $switchto .= '&origurl='.$firsturl; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + $r->internal_redirect($switchto); + } else { + $r->print(&noswitch()); + } + return OK; + } else { + if (!&check_can_host($r,\%form,$authhost)) { + my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); + if ($otherserver) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, + \%form); + my $switchto = '/adm/switchserver?otherserver='.$otherserver; + if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { + $switchto .= '&origurl='.$firsturl; + } + if ($form{'role'}) { + $switchto .= '&role='.$form{'role'}; + } + if ($form{'symb'}) { + $switchto .= '&symb='.$form{'symb'}; + } + $r->internal_redirect($switchto); + } else { + $r->print(&noswitch()); + } + return OK; + } + +# ------------------------------------------------------- Do the load balancing + +# ---------------------------------------------------------- Determine own load + my $loadlim = $r->dir_config('lonLoadLim'); + my $loadavg; + { + my $loadfile=Apache::File->new('/proc/loadavg'); + $loadavg=<$loadfile>; + } + $loadavg =~ s/\s.*//g; + my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); + my $userloadpercent=&Apache::lonnet::userload(); + +# ---------------------------------------------------------- Are we overloaded? + if ((($userloadpercent>100.0)||($loadpercent>100.0))) { + my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); + if (!$unloaded) { + ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); + } + if ($unloaded) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', + undef,\%form); + $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); + return OK; + } + } + &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, + \%form); + return OK; + } +} + +sub check_can_host { + my ($r,$form,$authhost,$domdesc) = @_; + return unless (ref($form) eq 'HASH'); + my $canhost = 1; + my $lonhost = $r->dir_config('lonHostID'); + my $udom = $form->{'udom'}; + my @intdoms; + my $internet_names = &Apache::lonnet::get_internet_names($lonhost); + if (ref($internet_names) eq 'ARRAY') { + @intdoms = @{$internet_names}; + } + my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); + my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); + unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { + my $machine_dom = &Apache::lonnet::host_domain($lonhost); + my $hostname = &Apache::lonnet::hostname($lonhost); + my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); + my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); + my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); + my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); + my $loncaparev; + if ($authhost eq 'no_account_on_host') { + $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); + } else { + $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); + } + $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, + $udomdefaults{'remotesessions'}, + $defdomdefaults{'hostedsessions'}); + } + unless ($canhost) { + if ($authhost eq 'no_account_on_host') { + my $checkloginvia = 1; + my ($login_host,$hostname) = + &Apache::lonnet::choose_server($udom,$checkloginvia); + &Apache::loncommon::content_type($r,'text/html'); + $r->send_http_header; + if ($login_host ne '') { + my $protocol = $Apache::lonnet::protocol{$login_host}; + $protocol = 'http' if ($protocol ne 'https'); + my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; + $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). + '

'.&mt('Account creation').'

'. + &mt('You do not currently have a LON-CAPA account at this institution.').'
'. + '

'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'

'. + '

'.&mt('[_1]Log in[_2]','',''). + &Apache::loncommon::end_page()); + } else { + $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). + '

'.&mt('Account creation unavailable').'

'. + &mt('You do not currently have a LON-CAPA account at this institution.').'
'. + '

'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'

'. + &Apache::loncommon::end_page()); + } + } else { + &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, + $form); + my ($otherserver) = &Apache::lonnet::choose_server($udom); + $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); + } + } + return $canhost; +} + +sub noswitch { + my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). + '

'.&mt('Session unavailable').'

'. + &mt('This LON-CAPA server is unable to host your session.').'
'. + '

'.&mt('Currently no other LON-CAPA server is available to host your session either.').'

'. + &Apache::loncommon::end_page(); + return $result; +} + +sub loginhelpdisplay { + my ($authdomain) = @_; + my $login_help = 1; + my $lang = &Apache::lonlocal::current_language(); + if ($login_help) { + my $dom = $authdomain; + if ($dom eq '') { + $dom = &Apache::lonnet::default_login_domain(); + } + my %domconfhash = &Apache::loncommon::get_domainconf($dom); + my $loginhelp_url; + if ($lang) { + $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang}; + if ($loginhelp_url ne '') { + return $loginhelp_url; + } + } + $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'}; + if ($loginhelp_url ne '') { + return $loginhelp_url; + } else { + return '/adm/loginproblems.html'; + } + } + return; } 1;