loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.161: download - view: text, annotated - select for diffs
Tue Oct 20 01:38:12 2020 UTC (4 years, 2 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- For non-SSO login on a balancer node, check for balancer cookie in lonauth.pm
  after login credentials validated. (Same as lonacc::sso_login for SSO login).
- Not all calls to check_loadbalancing() require determination of a server
  to which to offload, even when $is_balancer is true.

# The LearningOnline Network # User Authentication Module # # $Id: lonauth.pm,v 1.161 2020/10/20 01:38:12 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 qw(:DEFAULT :match); use Apache::Constants qw(:common); use CGI qw(:standard); use Apache::loncommon(); use Apache::lonnet; use Apache::lonmenu(); use Apache::createaccount; use Apache::ltiauth; use Fcntl qw(:flock); use Apache::lonlocal; use Apache::File(); use HTML::Entities; use Digest::MD5; # ------------------------------------------------------------ Successful login sub success { my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, $form,$skipcritical,$cid) = @_; # ------------------------------------------------------------ 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 $ENV{'REMOTE_ADDR'}"); # ------------------------------------------------- Check for critical messages unless ($skipcritical) { 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 = $lowerurl; if ($env{'request.lti.login'}) { if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) { &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); } $r->send_http_header; if (ref($form) eq 'HASH') { $form->{'lti.login'} = $env{'request.lti.login'}; $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'}; $form->{'lti.reqrole'} = $env{'request.lti.reqrole'}; $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'}; } &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain); return; } if ($env{'request.lti.selfenrollrole'}) { if (&Apache::ltiauth::lti_enroll($username,$domain, $env{'request.lti.selfenrollrole'}) eq 'ok') { $form->{'role'} = $env{'request.lti.selfenrollrole'}; &Apache::lonnet::delenv('request.lti.selfenrollrole'); } else { &Apache::ltiauth::invalid_request($r,24); } } } 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 $windowname = 'loncapaclient'; if ($env{'request.lti.login'}) { $windowname .= 'lti'; } my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";'); my $brcrum = [{'href' => '', 'text' => 'Successful Login'},]; my $args = {'bread_crumbs' => $brcrum,}; unless ((defined($form->{role})) || (defined($form->{symb}))) { my $update=$env{'user.update.time'}; if (!$update) { $update = $env{'user.login.time'}; } my %roles_in_env; my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update); if ($showcount == 1) { foreach my $rolecode (keys(%roles_in_env)) { my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)}); if ($cid) { my %coursedescription = &Apache::lonnet::coursedescription($cid,{'one_time' => '1'}); if ($coursedescription{'type'} eq 'Placement') { $args->{'crstype'} = 'Placement'; } last; } } } } # ------------------------------------------------- Output for successful login &Apache::loncommon::content_type($r,'text/html'); if ($securecookie) { $r->headers_out->add('Set-cookie' => $securecookie); } if ($defaultcookie) { $r->headers_out->add('Set-cookie' => $defaultcookie); } $r->send_http_header; my ($start_page,$js,$pagebody,$end_page); if ($env{'request.lti.login'}) { $args = {'only_body' => 1}; if ($env{'request.lti.target'} eq '') { my $ltitarget = (($destination =~ /\?/) ? '&' : '?'). 'ltitarget=iframe'; $js = <<"ENDJS"; <script type="text/javascript"> // <![CDATA[ function setLTItarget() { var newloc = '$destination'; if (parent !== window) { newloc += '$ltitarget'; } window.location.href=newloc; } // ]]> </script> ENDJS $args->{'add_entries'} = {'onload' => "javascript:setLTItarget();"}; $pagebody = '<noscript><span class="LC_warning">' .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.') .'</span></noscript>'; } else { $args->{'redirect'} = [0,$destination,1]; } $start_page=&Apache::loncommon::start_page('',$js,$args); } else { $args->{'redirect'} = [0,$destination]; $start_page=&Apache::loncommon::start_page('Successful Login', $js,$args); my %lt=&Apache::lonlocal::texthash( 'wel' => 'Welcome', 'pro' => 'Login problems?', ); $pagebody = "<h1>$lt{'wel'}</h1>\n". &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); my $loginhelp = &loginhelpdisplay($domain); if ($loginhelp) { $pagebody .= '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>'; } } $end_page = &Apache::loncommon::end_page(); $r->print(<<ENDSUCCESS); $start_page $windowinfo $pagebody $end_page ENDSUCCESS return; } # --------------------------------------------------------------- Failed login! sub failed { my ($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='.$symb; } } if (exists($form->{firsturl})) { my $firsturl = &Apache::loncommon::cleanup_html($form->{firsturl}); if ($firsturl ne '') { $retry .= (($retry=~/\?/)?'&':'?').'firsturl='.$firsturl; if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) { unless (exists($form->{linkprot})) { if (exists($form->{linkkey})) { $retry .= 'linkkey='.$form->{linkkey}; } } } } } if (exists($form->{linkprot})) { my $ltoken = &Apache::lonnet::tmpput({linkprot => $form->{'linkprot'}}, $r->dir_config('lonHostID')); if ($ltoken) { $retry .= (($retry =~ /\?/) ? '&' : '?').'ltoken='.$ltoken; } } my $end_page = &Apache::loncommon::end_page(); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my @actions = (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')); my $loginhelp = &loginhelpdisplay($udom); if ($loginhelp) { push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>'); } #FIXME: link to helpdesk might be added here $r->print( $start_page .'<h2>'.&mt('Sorry ...').'</h2>' .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />' .&Apache::lonhtmlcommon::actionbox(\@actions) .$end_page ); } # ------------------------------------------------------------------ Rerouting! sub reroute { my ($r) = @_; &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; my $msg='<b>'.&mt('Sorry ...').'</b><br />' .&mt('Please [_1]log in again[_2].'); &Apache::loncommon::simple_error_page($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 $dest = '/adm/roles'; if ($env{'form.firsturl'} ne '') { $dest = $env{'form.firsturl'}; if ($env{'form.firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { &Apache::lonnet::appenv({'request.deeplink.login' => $env{'form.firsturl'}}); } } $r->print( $start_page .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>' .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') .'</p>' .$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'},$form{'suname'},$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($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); return OK; } my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr,$linkstr)=split(/&/,$tmpinfo); if ($rolestr) { $rolestr = &unescape($rolestr); } if ($symbstr) { $symbstr= &unescape($symbstr); } if ($iptokenstr) { $iptokenstr = &unescape($iptokenstr); } if ($linkstr) { $linkstr = &unescape($linkstr); } if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) { $form{'firsturl'} = $firsturl; } if ($rolestr =~ /^role=/) { (undef,$form{'role'}) = split('=',$rolestr); } if ($symbstr =~ /^symb=/) { (undef,$form{'symb'}) = split('=',$symbstr); } if ($iptokenstr =~ /^iptoken=/) { (undef,$form{'iptoken'}) = split('=',$iptokenstr); } if ($linkstr =~ /^linkprot=/) { (undef,$form{'linkprot'}) = split('=',$linkstr); } elsif ($linkstr =~ /^linkkey=/) { (undef,$form{'linkkey'}) = split('=',$linkstr); } 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('<h3>'.&mt('Account creation').'</h3>'. &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. $output.&Apache::loncommon::end_page()); return OK; } else { &failed($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'}) { 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) { $otherserver = &Apache::lonnet::spareserver($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; #should escape } if ($form{'role'}) { $switchto .= '&role='.$form{'role'}; } if ($form{'symb'}) { $switchto .= '&symb='.$form{'symb'}; } if ($form{'linkprot'}) { $env{'request.linkprot'} = $form{'linkprot'}; } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { if ($form{'linkkey'}) { $env{'request.linkkey'} = $form{'linkkey'}; } $env{'request.deeplink.login'} = $form{'firsturl'}; } $r->internal_redirect($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; #should escape } if ($form{'role'}) { $switchto .= '&role='.$form{'role'}; } if ($form{'symb'}) { $switchto .= '&symb='.$form{'symb'}; } if ($form{'linkprot'}) { $env{'request.linkprot'} = $form{'linkprot'}; } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { if ($form{'linkkey'}) { $env{'request.linkkey'} = $form{'linkkey'}; } $env{'request.deeplink.login'} = $form{'firsturl'}; } $r->internal_redirect($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 $unloaded=Apache::lonnet::spareserver($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); if ($form{'linkprot'}) { $env{'request.linkprot'} = $form{'linkprot'}; } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { if ($form{'linkkey'}) { $env{'request.linkkey'} = $form{'linkkey'}; } $env{'request.deeplink.login'} = $form{'firsturl'}; } $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); return OK; } } if (($is_balancer) && ($hosthere)) { $form{'noloadbalance'} = $hosthere; } my $extra_env; if ($form{'linkprot'}) { my ($linkprotector,$uri) = split(/:/,$form{'linkprot'},2); if ($linkprotector) { $extra_env = {'user.linkprotector' => $linkprotector, 'user.linkproturi' => $uri,}; } } elsif ($form{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { if ($form{'linkkey'}) { $extra_env = {'user.deeplinkkey' => $form{'linkkey'}, 'user.keyedlinkuri' => $form{'firsturl'}, 'request.deeplink.login' => $form{'firsturl'}}; } else { $extra_env = {'request.deeplink.login' => $form{'firsturl'}}; } } &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,$extra_env, \%form); return OK; } } sub check_can_host { my ($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'; #FIXME Should preserve where user was going and linkprot by setting ltoken at $login_host $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). '<h3>'.&mt('Account creation').'</h3>'. &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). &Apache::loncommon::end_page()); } else { $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). '<h3>'.&mt('Account creation unavailable').'</h3>'. &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. &Apache::loncommon::end_page()); } } else { &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, $form); if ($form->{'linkprot'}) { $env{'request.linkprot'} = $form->{'linkprot'}; } elsif ($form->{'firsturl'} =~ m{^/tiny/$match_domain/\w+$}) { if ($form->{'linkkey'}) { $env{'request.linkkey'} = $form->{'linkkey'}; } $env{'request.deeplink.login'} = $form->{'firsturl'}; } my ($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'). '<h3>'.&mt('Session unavailable').'</h3>'. &mt('This LON-CAPA server is unable to host your session.').'<br />'. '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'. &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__