--- loncom/auth/lonauth.pm 2022/02/27 02:06:20 1.121.2.25 +++ loncom/auth/lonauth.pm 2016/02/17 19:15:40 1.139 @@ -1,855 +1,631 @@ -# The LearningOnline Network -# User Authentication Module -# -# $Id: lonauth.pm,v 1.121.2.25 2022/02/27 02:06:20 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 CGI qw(:standard); -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; -use Digest::MD5; -use CGI::Cookie(); - -# ------------------------------------------------------------ Successful login -sub success { - my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, - $form,$cid,$expirepub) = @_; - -# ------------------------------------------------------------ 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 - - my $ip = &Apache::lonnet::get_requestor_ip(); - &Apache::lonnet::log($domain,$username,$authhost, - "Login $ip"); - -# ------------------------------------------------- Check for critical messages - - my @what=&Apache::lonnet::dump('critical',$domain,$username); - if ($what[0]) { - if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { - $lowerurl='/adm/email?critical=display'; - } - } - -# ------------------------------------------------------------ Get cookies ready - my ($securecookie,$defaultcookie); - my $ssl = $r->subprocess_env('https'); - if ($ssl) { - $securecookie="lonSID=$cookie; path=/; HttpOnly; secure"; - my $lonidsdir=$r->dir_config('lonIDsDir'); - if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) { - my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked'; - if (-e "$lonidsdir/$linkname.id") { - unlink("$lonidsdir/$linkname.id"); - } - my $made_symlink = eval { symlink("$lonidsdir/$cookie.id", - "$lonidsdir/$linkname.id"); 1 }; - if ($made_symlink) { - $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;"; - &Apache::lonnet::appenv({'user.linkedenv' => $linkname}); - } - } - } else { - $defaultcookie = "lonID=$cookie; path=/; HttpOnly;"; - } -# -------------------------------------------------------- Menu script and info - my $destination = $lowerurl; - - if (defined($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}; - my $encrypted; - if ($destsymb =~ m{^/enc/}) { - $encrypted = 1; - if ($cid) { - $destsymb = &Apache::lonenc::unencrypted($destsymb,$cid); - } - } - $destination .= ($destination =~ /\?/) ? '&' : '?'; - if ($destsymb =~ /___/) { - my ($map,$resid,$desturl)=split(/___/,$destsymb); - $desturl = &Apache::lonnet::clutter($desturl); - if ($encrypted) { - $desturl = &Apache::lonenc::encrypted($desturl,1,$cid); - $destsymb = $form->{symb}; - } - $desturl = &HTML::Entities::encode($desturl,'"<>&'); - $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); - $destination .= 'destinationurl='.$desturl. - '&destsymb='.$destsymb; - } elsif (!$encrypted) { - $destsymb = &HTML::Entities::encode($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') { - $continuelink=''.&mt('Continue').''; - } -# ------------------------------------------------- Output for successful login - - &Apache::loncommon::content_type($r,'text/html'); - if ($securecookie) { - $r->headers_out->add('Set-cookie' => $securecookie); - } - if ($defaultcookie) { - $r->headers_out->add('Set-cookie' => $defaultcookie); - } - if ($expirepub) { - my $c = new CGI::Cookie(-name => 'lonPubID', - -value => '', - -expires => '-10y',); - $r->headers_out->add('Set-cookie' => $c); - } - $r->send_http_header; - - my %lt=&Apache::lonlocal::texthash( - 'wel' => 'Welcome', - 'pro' => 'Login problems?', - ); - my $loginhelp = &loginhelpdisplay($domain); - if ($loginhelp) { - $loginhelp = '

'.$lt{'pro'}.'

'; - } - - my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','',''); - $r->print(<$lt{'wel'} -$welcome -$loginhelp -$remoteinfo -$maincall -$continuelink -$end_page -ENDSUCCESS - return; -} - -# --------------------------------------------------------------- Failed login! - -sub failed { - my ($r,$message,$form,$authhost) = @_; - (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; - } - my $lonhost = $r->dir_config('lonHostID'); - my $querystr; - my $result = &set_retry_token($form,$lonhost,\$querystr); - if ($result eq 'fail') { - 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='.$symb; - } - } - if (exists($form->{firsturl})) { - my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl}); - if ($firsturl ne '') { - $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl; - } - } - } elsif ($querystr ne '') { - $retry .= (($retry=~/\?/)?'&':'?').$querystr; - } - 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 = $r->dir_config('lonDocRoot'); -# Are we re-routing? - if (-e "$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 $dest = '/adm/roles'; - my %form = &get_form_items($r); - if ($form{'logtoken'}) { - my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, - $form{'serverid'}); - unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || - ($tmpinfo eq 'no_such_host')) { - my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); - $firsturl = &unescape($firsturl); - my %info; - foreach my $item (@rest) { - my ($key,$value) = split(/=/,$item); - $info{$key} = &unescape($value); - } - if ($firsturl ne '') { - $info{'firsturl'} = $firsturl; - $dest = $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].' - ,'','','','') - .'

' - .$end_page - ); - return OK; - } - } - -# ---------------------------------------------------- No valid token, continue - - my %form = &get_form_items($r); - if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { - &failed($r,'Username, password and domain need to be specified.', - \%form); - return OK; - } - -# split user logging in and "su"-user - - ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'}); - $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); - $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); - $form{'udom'} = &LONCAPA::clean_domain($form{'udom'}); - $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'}); - - 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'}, - $form{'serverid'}); - - if (($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 ". $form{'serverid'}." to get login token"); - return OK; - } - } - - if (!&Apache::lonnet::domain($form{'udom'})) { - &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); - return OK; - } - - my ($des_key,$firsturl,@rest)=split(/&/,$tmpinfo); - $firsturl = &unescape($firsturl); - foreach my $item (@rest) { - my ($key,$value) = split(/=/,$item); - $form{$key} = &unescape($value); - } - my $upass = &Apache::loncommon::des_decrypt($des_key,$form{'upass0'}); - -# ---------------------------------------------------------------- Authenticate - - my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$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') { - my $pwdverify; - if (&Apache::lonnet::homeserver($form{'uname'},$form{'udom'}) eq 'no_host') { - my %possunames = &alternate_unames_check($form{'uname'},$form{'udom'}); - if (keys(%possunames) > 0) { - foreach my $rulematch (keys(%possunames)) { - my $possuname = $possunames{$rulematch}; - if (($possuname ne '') && ($possuname =~ /^$match_username$/)) { - $authhost=Apache::lonnet::authenticate($possuname,$upass, - $form{'udom'},undef, - $clientcancheckhost); - if (($authhost eq 'no_host') || ($authhost eq 'no_account_on_host')) { - next; - } elsif (($authhost ne '') && (&Apache::lonnet::hostname($authhost) ne '')) { - $pwdverify = 1; - &Apache::lonnet::logthis("Authenticated user: $possuname was submitted as: $form{'uname'}"); - $form{'uname'} = $possuname; - last; - } - } - } - } - } - unless ($pwdverify) { - &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=~/^\/adm\/(logout|remote)/)) { - $firsturl='/adm/roles'; - } - - my ($hosthere,%sessiondata); - if ($form{'iptoken'}) { - %sessiondata = &Apache::lonnet::tmpget($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'}) { - my ($suname,$sudom,$sudomref); - $suname = $form{'suname'}; - $sudom = $form{'udom'}; - if ($form{'sudom'}) { - unless ($sudom eq $form{'sudom'}) { - if (&Apache::lonnet::domain($form{'sudom'})) { - $sudomref = [$form{'sudom'}]; - $sudom = $form{'sudom'}; - } - } - } -# ------------ see if the original user has enough privileges to pull this stunt - if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) { -# ---------------------------------------------------- see if the su-user exists - unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') { -# ------------------------------ see if the su-user is not too highly privileged - if (&Apache::lonnet::privileged($suname,$sudom)) { - &Apache::lonnet::logthis('Attempted switch user to privileged user'); - } else { - my $noprivswitch; -# -# su-user's home server and user's home server must have one of: -# (a) same domain -# (b) same primary library server for the two domains -# (c) same "internet domain" for primary library server(s) for home servers' domains -# - my $suprim = &Apache::lonnet::domain($sudom,'primary'); - my $suintdom = &Apache::lonnet::internet_dom($suprim); - unless ($sudom eq $form{'udom'}) { - my $uprim = &Apache::lonnet::domain($form{'udom'},'primary'); - my $uintdom = &Apache::lonnet::internet_dom($uprim); - unless ($suprim eq $uprim) { - unless ($suintdom eq $uintdom) { - &Apache::lonnet::logthis('Attempted switch user ' - .'to user with different "internet domain".'); - $noprivswitch = 1; - } - } - } - - unless ($noprivswitch) { -# -# server where log-in occurs must have same "internet domain" as su-user's home -# server -# - my $lonhost = $r->dir_config('lonHostID'); - my $hostintdom = &Apache::lonnet::internet_dom($lonhost); - if ($hostintdom ne $suintdom) { - &Apache::lonnet::logthis('Attempted switch user on a ' - .'server with a different "internet domain".'); - } else { - -# -------------------------------------------------------- actually switch users - - &Apache::lonnet::logperm('User '.$form{'uname'}.' at '. - $form{'udom'}.' logging in as '.$suname.':'.$sudom); - $form{'uname'}=$suname; - if ($form{'udom'} ne $sudom) { - $form{'udom'}=$sudom; - } - } - } - } - } - } 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'},$form{'udom'},'login'); - if ($is_balancer) { - # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) - my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r); - if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) { - $otherserver = $found_server; - } - if ($otherserver eq '') { - my $lowest_load; - ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'}); - if ($lowest_load > 100) { - $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$form{'udom'}); - } - } - if ($otherserver ne '') { - my @hosts = &Apache::lonnet::current_machine_ids(); - if (grep(/^\Q$otherserver\E$/,@hosts)) { - $hosthere = $otherserver; - } - } - } - } - - if (($is_balancer) && (!$hosthere)) { - if ($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 { - &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - $r->print(&noswitch()); - } - return OK; - } else { - if (!&check_can_host($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 { - &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - $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 $unloaded=Apache::lonnet::spareserver($r,$loadpercent,$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='.$firsturl); - return OK; - } - } - if (($is_balancer) && ($hosthere)) { - $form{'noloadbalance'} = $hosthere; - } - my $extra_env; - if (($hosthere) && ($sessiondata{'sessionserver'} ne '')) { - if ($sessiondata{'origurl'} ne '') { - $firsturl = $sessiondata{'origurl'}; - $form{'firsturl'} = $sessiondata{'origurl'}; - my @names = ('role','symb','linkprot','linkkey'); - foreach my $item (@names) { - if ($sessiondata{$item} ne '') { - $form{$item} = $sessiondata{$item}; - } - } - } - } - &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, - \%form); - return OK; - } -} - -sub get_form_items { - my ($r) = @_; - my $buffer; - if ($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}=$value; - } - return %form; -} - -sub set_retry_token { - my ($form,$lonhost,$querystr) = @_; - if (ref($form) eq 'HASH') { - my ($firsturl,$token,$extras,@names); - @names = ('role','symb','iptoken'); - foreach my $name (@names) { - if ($form->{$name} ne '') { - $extras .= '&'.$name.'='.&escape($form->{$name}); - last if ($name eq 'linkprot'); - } - } - my $firsturl = $form->{'firsturl'}; - if (($firsturl ne '') || ($extras ne '')) { - $extras .= ':retry'; - $token = &Apache::lonnet::reply('tmpput:'.&escape($firsturl). - $extras,$lonhost); - if (($token eq 'con_lost') || ($token eq 'no_such_host')) { - return 'fail'; - } else { - if (ref($querystr)) { - $$querystr = 'retry='.$token; - } - return 'ok'; - } - } - } - return; -} - -sub check_can_host { - my ($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 $alias = &Apache::lonnet::use_proxy_alias($r,$login_host); - $hostname = $alias if ($alias ne ''); - 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 $loginhelp_url; - } else { - return '/adm/loginproblems.html'; - } - } - return; -} - -sub alternate_unames_check { - my ($uname,$udom) = @_; - my %possunames; - my %domdefs = &Apache::lonnet::get_domain_defaults($udom); - if (ref($domdefs{'unamemap_rule'}) eq 'ARRAY') { - if (@{$domdefs{'unamemap_rule'}} > 0) { - %possunames = - &Apache::lonnet::inst_rulecheck($udom,$uname,undef, - 'unamemap',$domdefs{'unamemap_rule'}); - } - } - return %possunames; -} - -1; -__END__ - - +# The LearningOnline Network +# User Authentication Module +# +# $Id: lonauth.pm,v 1.139 2016/02/17 19:15:40 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 CGI qw(:standard); +use DynaLoader; # for Crypt::DES version +use Crypt::DES; +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, $extra_env, + $form) = @_; + +# ------------------------------------------------------------ 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 $cookie; } + +# -------------------------------------------------------------------- Log this + + &Apache::lonnet::log($domain,$username,$authhost, + "Login $ENV{'REMOTE_ADDR'}"); + +# ------------------------------------------------- Check for critical messages + + my @what=&Apache::lonnet::dump('critical',$domain,$username); + if ($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 = $lowerurl; + + if (defined($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); + $desturl = &Apache::lonnet::clutter($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::lonhtmlcommon::scripttag('self.name="loncapaclient";'); + my $header = ''; + my $brcrum = [{'href' => '', + 'text' => 'Successful Login'},]; + my $start_page=&Apache::loncommon::start_page('Successful Login', + $header, + {'bread_crumbs' => $brcrum,}); + my $end_page =&Apache::loncommon::end_page(); + + my $continuelink=''.&mt('Continue').''; +# ------------------------------------------------- Output for successful login + + &Apache::loncommon::content_type($r,'text/html'); + $r->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'}.'

'; + } + + my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','',''); + $r->print(<$lt{'wel'} +$welcome +$loginhelp +$continuelink +$end_page +ENDSUCCESS + return; +} + +# --------------------------------------------------------------- Failed login! + +sub failed { + 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 $buffer; + if ($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}=$value; + } + + if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { + &failed($r,'Username, password and domain need to be specified.', + \%form); + return OK; + } + +# split user logging in and "su"-user + + ($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'}, + $form{'serverid'}); + + if (($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 ". $form{'serverid'}." to get login token"); + return OK; + } + } + + if (!&Apache::lonnet::domain($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 $upass = $ENV{HTTPS} ? $form{'upass0'} + : &Apache::loncommon::des_decrypt($key,$form{'upass0'}); + +# ---------------------------------------------------------------- Authenticate + + my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$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($r,'Username and/or password could not be authenticated.', + \%form); + return OK; + } elsif ($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'); + 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=~/^\/adm\/(logout|remote)/)) { + $firsturl='/adm/roles'; + } + + 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; +__END__ + +