--- loncom/auth/lonlogin.pm 2016/08/13 20:11:58 1.158.2.6 +++ loncom/auth/lonlogin.pm 2020/10/26 02:00:13 1.158.2.11 @@ -1,7 +1,7 @@ # The LearningOnline Network # Login Screen # -# $Id: lonlogin.pm,v 1.158.2.6 2016/08/13 20:11:58 raeburn Exp $ +# $Id: lonlogin.pm,v 1.158.2.11 2020/10/26 02:00:13 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -37,7 +37,8 @@ use Apache::lonauth(); use Apache::lonlocal; use Apache::migrateuser(); use lib '/home/httpd/lib/perl/'; -use LONCAPA; +use LONCAPA qw(:DEFAULT :match); +use CGI::Cookie(); sub handler { my $r = shift; @@ -46,7 +47,7 @@ sub handler { (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'}, $ENV{'REDIRECT_QUERY_STRING'}), ['interface','username','domain','firsturl','localpath','localres', - 'token','role','symb','iptoken']); + 'token','role','symb','iptoken','btoken']); if (!defined($env{'form.firsturl'})) { &Apache::lonacc::get_posted_cgi($r,['firsturl']); } @@ -56,9 +57,39 @@ sub handler { return &Apache::migrateuser::handler($r); } +# For "public user" - remove any exising "public" cookie, as user really wants to log-in + my ($handle,$lonidsdir,$expirepub,$userdom); + $lonidsdir=$r->dir_config('lonIDsDir'); + unless ($r->header_only) { + $handle = &Apache::lonnet::check_for_valid_session($r,'lonID',undef,\$userdom); + if ($handle ne '') { + if ($handle=~/^publicuser\_/) { + unlink($r->dir_config('lonIDsDir')."/$handle.id"); + undef($handle); + undef($userdom); + $expirepub = 1; + } + } + } + &Apache::loncommon::no_cache($r); &Apache::lonlocal::get_language_handle($r); &Apache::loncommon::content_type($r,'text/html'); + if ($expirepub) { + my $c = new CGI::Cookie(-name => 'lonPubID', + -value => '', + -expires => '-10y',); + $r->header_out('Set-cookie' => $c); + } elsif (($handle eq '') && ($userdom ne '')) { + my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); + foreach my $name (keys(%cookies)) { + next unless ($name =~ /^lon(|S|Link|Pub)ID$/); + my $c = new CGI::Cookie(-name => $name, + -value => '', + -expires => '-10y',); + $r->headers_out->add('Set-cookie' => $c); + } + } $r->send_http_header; return OK if $r->header_only; @@ -70,37 +101,91 @@ sub handler { return OK; } + my $lonhost = $r->dir_config('lonHostID'); $env{'form.firsturl'} =~ s/(`)/'/g; -# -------------------------------- 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); - my $start_page = - &Apache::loncommon::start_page('Already logged in'); - my $end_page = - &Apache::loncommon::end_page(); +# Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer) + + my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1); + if ($found_server) { + my $hostname = &Apache::lonnet::hostname($found_server); + if ($hostname ne '') { + my $protocol = $Apache::lonnet::protocol{$found_server}; + $protocol = 'http' if ($protocol ne 'https'); my $dest = '/adm/roles'; if ($env{'form.firsturl'} ne '') { - $dest = $env{'form.firsturl'}; + $dest = $env{'form.firsturl'}; + } + my %info = ( + balcookie => $lonhost.':'.$balancer_cookie, + ); + my $balancer_token = &Apache::lonnet::tmpput(\%info,$found_server); + if ($balancer_token) { + $dest .= (($dest=~/\?/)?'&;':'?') . 'btoken='.$balancer_token; } - $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 - ); + my $url = $protocol.'://'.$hostname.$dest; + my $start_page = + &Apache::loncommon::start_page('Switching Server ...',undef, + {'redirect' => [0,$url],}); + my $end_page = &Apache::loncommon::end_page(); + $r->print($start_page.$end_page); return OK; } } +# +# Check if a LON-CAPA load balancer sent user here because user's browser sent +# it a balancer cookie for an active session on this server. +# + + my $balcookie; + if ($env{'form.btoken'}) { + my %info = &Apache::lonnet::tmpget($env{'form.btoken'}); + $balcookie = $info{'balcookie'}; + &Apache::lonnet::tmpdel($env{'form.btoken'}); + delete($env{'form.btoken'}); + } + +# +# If browser sent an old cookie for which the session file had been removed +# check if configuration for user's domain has a portal URL set. If so +# switch user's log-in to the portal. +# + + if (($handle eq '') && ($userdom ne '')) { + my %domdefaults = &Apache::lonnet::get_domain_defaults($userdom); + if ($domdefaults{'portal_def'} =~ /^https?\:/) { + my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef, + {'redirect' => [0,$domdefaults{'portal_def'}],}); + my $end_page = &Apache::loncommon::end_page(); + $r->print($start_page.$end_page); + return OK; + } + } + + $env{'form.firsturl'} =~ s/(`)/'/g; + +# -------------------------------- Prevent users from attempting to login twice + if ($handle ne '') { + &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); + 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 # ---------------------------- Not possible to really login to domain "public" @@ -127,12 +212,11 @@ sub handler { my $iconpath= &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL')); - my $lonhost = $r->dir_config('lonHostID'); my $domain = &Apache::lonnet::default_login_domain(); my $defdom = $domain; if ($lonhost ne '') { unless ($sessiondata{'sessionserver'}) { - my $redirect = &check_loginvia($domain,$lonhost); + my $redirect = &check_loginvia($domain,$lonhost,$lonidsdir,$balcookie); if ($redirect) { $r->print($redirect); return OK; @@ -141,7 +225,7 @@ sub handler { } if (($sessiondata{'domain'}) && - (&Apache::lonnet::domain($env{'form.domain'},'description'))) { + (&Apache::lonnet::domain($sessiondata{'domain'},'description'))) { $domain=$sessiondata{'domain'}; } elsif (($env{'form.domain'}) && (&Apache::lonnet::domain($env{'form.domain'},'description'))) { @@ -244,22 +328,36 @@ sub handler { &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab'); } my $spares=''; - my $last; - foreach my $hostid (sort - { - &Apache::lonnet::hostname($a) cmp - &Apache::lonnet::hostname($b); - } - keys(%Apache::lonnet::spareid)) { + my (@sparehosts,%spareservers); + my $sparesref = &Apache::lonnet::this_host_spares($defdom); + if (ref($sparesref) eq 'HASH') { + foreach my $key (keys(%{$sparesref})) { + if (ref($sparesref->{$key}) eq 'ARRAY') { + my @sorted = sort { &Apache::lonnet::hostname($a) cmp + &Apache::lonnet::hostname($b); + } @{$sparesref->{$key}}; + if (@sorted) { + if ($key eq 'primary') { + unshift(@sparehosts,@sorted); + } elsif ($key eq 'default') { + push(@sparehosts,@sorted); + } + } + } + } + } + foreach my $hostid (@sparehosts) { next if ($hostid eq $lonhost); my $hostname = &Apache::lonnet::hostname($hostid); - next if (($last eq $hostname) || ($hostname eq '')); - $spares.='
'. $hostname.''. - ' '.&mt('(preferred)').''.$/; - $last=$hostname; + ' '.&mt('(preferred)').''.$/; } if ($spares) { $spares.= '
'; @@ -271,23 +369,26 @@ sub handler { &Apache::lonnet::hostname($b); } keys(%all_hostnames)) { - next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); + next if ($hostid eq $lonhost); my $hostname = &Apache::lonnet::hostname($hostid); - next if (($last eq $hostname) || ($hostname eq '')); - $spares.='
'. $hostname.''; - $last=$hostname; } $r->print( - '' - .'' + '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">' + .'<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">' + .'<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>' .&mt('The LearningOnline Network with CAPA') .'' .'' .'

'.&mt('The LearningOnline Network with CAPA').'

' - .'' + .'broken icon' .'

'.&mt('This LON-CAPA server is temporarily not available for login.').'

'); if ($spares) { $r->print('

'.&mt('Please attempt to login to one of the following servers:') @@ -635,8 +736,8 @@ ENDDOCUMENT } sub check_loginvia { - my ($domain,$lonhost) = @_; - if ($domain eq '' || $lonhost eq '') { + my ($domain,$lonhost,$lonidsdir,$balcookie) = @_; + if ($domain eq '' || $lonhost eq '' || $lonidsdir eq '') { return; } my %domconfhash = &Apache::loncommon::get_domainconf($domain); @@ -665,6 +766,36 @@ sub check_loginvia { } if ($newhost ne $lonhost) { if (&Apache::lonnet::hostname($newhost) ne '') { + if ($balcookie) { + my ($balancer,$cookie) = split(/:/,$balcookie); + if ($cookie =~ /^($match_domain)_($match_username)_([a-f0-9]+)$/) { + my ($udom,$uname,$cookieid) = ($1,$2,$3); + unless (&Apache::lonnet::delbalcookie($cookie,$balancer) eq 'ok') { + if ((-d $lonidsdir) && (opendir(my $dh,$lonidsdir))) { + while (my $filename=readdir($dh)) { + if ($filename=~/^(\Q$uname\E_\d+_\Q$udom\E_$match_lonid)\.id$/) { + my $handle = $1; + my %hash = + &Apache::lonnet::get_sessionfile_vars($handle,$lonidsdir, + ['request.balancercookie', + 'user.linkedenv']); + if ($hash{'request.balancercookie'} eq "$balancer:$cookieid") { + if (unlink("$lonidsdir/$filename")) { + if (($hash{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) && + (-l "$lonidsdir/$hash{'user.linkedenv'}.id") && + (readlink("$lonidsdir/$hash{'user.linkedenv'}.id") eq "$lonidsdir/$filename")) { + unlink("$lonidsdir/$hash{'user.linkedenv'}.id"); + } + } + } + last; + } + } + closedir($dh); + } + } + } + } $output = &redirect_page($newhost,$path); } } @@ -675,12 +806,13 @@ sub check_loginvia { sub redirect_page { my ($desthost,$path) = @_; + my $hostname = &Apache::lonnet::hostname($desthost); my $protocol = $Apache::lonnet::protocol{$desthost}; $protocol = 'http' if ($protocol ne 'https'); unless ($path =~ m{^/}) { $path = '/'.$path; } - my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path; + my $url = $protocol.'://'.$hostname.$path; if ($env{'form.firsturl'} ne '') { $url .='?firsturl='.$env{'form.firsturl'}; }