--- loncom/auth/switchserver.pm 2005/10/24 21:35:16 1.2 +++ loncom/auth/switchserver.pm 2020/10/22 19:23:22 1.51 @@ -1,7 +1,7 @@ # The LearningOnline Network # Switch Servers Handler # -# $Id: switchserver.pm,v 1.2 2005/10/24 21:35:16 albertel Exp $ +# $Id: switchserver.pm,v 1.51 2020/10/22 19:23:22 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -31,79 +31,316 @@ package Apache::switchserver; use strict; use Apache::Constants qw(:common); use Apache::lonnet; -use Apache::lonmenu; +use Digest::MD5 qw(md5_hex); use CGI::Cookie(); use Apache::lonlocal; +use LONCAPA qw(:DEFAULT :match); sub init_env { my ($r) = @_; + + if (-e $env{'user.environment'}) { + return $env{'user.environment'}; + } my $requrl=$r->uri; - my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); - my $lonid=$cookies{'lonID'}; - my $cookie; - if (!$lonid) { return undef; } - - my $handle=$lonid->value; - $handle=~s/\W//g; - my $lonidsdir=$r->dir_config('lonIDsDir'); - if ((!-e "$lonidsdir/$handle.id") || ($handle eq '')) { - $r->log_reason("Cookie $handle not valid", $r->filename); + my $handle= &Apache::lonnet::check_for_valid_session($r); + if ($handle ne '') { return undef; } - + my $lonidsdir=$r->dir_config('lonIDsDir'); &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); - - return $handle; + + return $r->dir_config('lonIDsDir')."/$handle.id"; +} + +sub do_redirect { + my ($r,$url,$only_body,$extra_text) = @_; + $r->send_http_header; + my $delay = 0.5; + if ($only_body) { + $delay = 0; + } + my $start_page = + &Apache::loncommon::start_page('Switching Server ...',undef, + {'redirect' => [$delay,$url], + 'only_body' => $only_body,}); + my $end_page = &Apache::loncommon::end_page(); + $r->print($start_page.$extra_text.$end_page); + unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) { + $r->register_cleanup(\&flush_course_logs); + } + return OK; +} + +sub balancer_cookieid { + my ($r,$desthost,$uname,$udom) = @_; + my @hosts = &Apache::lonnet::current_machine_ids(); + my $newcookieid; + unless (grep(/^\Q$desthost\E$/,@hosts)) { + my $balancedir=$r->dir_config('lonBalanceDir'); + $newcookieid = &md5_hex(&md5_hex(time.{}.rand().$$)); + my $cookie = $udom.'_'.$uname.'_'.$newcookieid; + my $balcookie = "balanceID=$cookie; path=/; HttpOnly;"; + if (open(my $fh,'>',"$balancedir/$cookie.id")) { + print $fh $desthost; + close($fh); + $r->headers_out->add('Set-cookie' => $balcookie); + } + } + return $newcookieid; +} + +sub flush_course_logs { + &Apache::lonnet::flushcourselogs(); + return OK; } sub handler { - my $r = shift; - + my ($r) = @_; my $handle=&init_env($r); if (!defined($handle)) { return FORBIDDEN; } &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'}, - ['otherserver','role']); - my $switch_to=$Apache::lonnet::hostname{$env{'form.otherserver'}}; + ['otherserver','role','origurl','symb']); + + my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'}); + if (! $env{'form.otherserver'}) { + $env{'form.otherserver'} = + &Apache::lonnet::find_existing_session($env{'user.domain'}, + $env{'user.name'}); + if (! $env{'form.otherserver'}) { + $env{'form.otherserver'} = + &Apache::lonnet::spareserver(30000,undef,1); + } + $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'}); + } + if (!defined($switch_to)) { return FORBIDDEN; } - if (!exists($env{'user.role.'.$env{'form.role'}})) { return FORBIDDEN; } + + my $protocol = 'http'; + if ($env{'form.otherserver'}) { + if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') { + $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}}; + } + } + + if ($env{'user.name'} eq 'public' + && $env{'user.domain'} eq 'public') { + my $url = $protocol.'://'.$switch_to.$r->uri; + unlink($handle); + #expire the cookie + my $c = new CGI::Cookie(-name => 'lonPubID', + -value => '', + -expires => '-10y',); + $r->header_out('Set-cookie' => $c); + return &do_redirect($r,$url,1) + } + + my $skip_canhost_check = ''; + my $now = time; + if ($env{'form.role'}) { + if (!exists($env{'user.role.'.$env{'form.role'}})) { + delete($env{'form.role'}); + } else { + my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}}); + if (($start && $start > $now) || ($end && $end < $now)) { + delete($env{'form.role'}); + } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') { + if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) { + $skip_canhost_check = 1; + } + } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) { + my ($audom,$auname) = ($1,$2); + if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) { + if ((&Apache::lonnet::will_trust('othcoau',$env{'user.domain'},$audom)) && + (&Apache::lonnet::will_trust('coaurem',$audom,$env{'user.domain'}))) { + $skip_canhost_check = 1; + } + } + } + } + } + + unless ($skip_canhost_check) { + my $canhost = 1; + my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary'); + my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); + my @intdoms; + my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'}); + if (ref($internet_names) eq 'ARRAY') { + @intdoms = @{$internet_names}; + } + unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { + my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to); + my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); + my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); + my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'}); + my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'}); + $canhost = + &Apache::lonnet::can_host_session($env{'user.domain'}, + $env{'form.otherserver'}, + $remoterev, + $udomdefaults{'remotesessions'}, + $defdomdefaults{'hostedsessions'}); + } + unless ($canhost) { return FORBIDDEN; } + } #remove session env, and log event - unlink($r->dir_config('lonIDsDir')."/$handle.id"); - my %temp=('switchserver' => time.':'.$env{'form.otherserver'}, + if (unlink($handle)) { + if ($env{'user.linkedenv'} ne '') { + my $lonidsdir=$r->dir_config('lonIDsDir'); + if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) && + (-l "$lonidsdir/$env{'user.linkedenv'}.id") && + (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq $handle)) { + unlink("$lonidsdir/$env{'user.linkedenv'}.id"); + } + } + } + my %temp=('switchserver' => $now.':'.$env{'form.otherserver'}, $env{'form.role'}); &Apache::lonnet::put('email_status',\%temp); + my $logmsg = "Switch Server to $env{'form.otherserver'}"; + if ($env{'form.role'}) { + $logmsg .= " with role: $env{'form.role'}"; + } elsif (($env{'form.lti.reqcrs'}) && ($env{'form.lti.reqrole'} eq 'cc')) { + $logmsg .= " to create new LTI course"; + } elsif ($env{'form.lti.selfenrollrole'}) { + $logmsg .= " to selfenroll with role: $env{'form.lti.selfenrollrole'}"; + } else { + $logmsg .= " (no role)"; + } + $logmsg .= ' '.$ENV{'REMOTE_ADDR'}; &Apache::lonnet::log($env{'user.domain'},$env{'user.name'}, - $env{'user.home'}, - "Switch Server to $env{'form.otherserver'} with role $env{'form.role'} $ENV{'REMOTE_ADDR'}"); + $env{'user.home'},$logmsg); &Apache::loncommon::content_type($r,'text/html'); - $r->send_http_header; - return OK if $r->header_only; + + #expire the cookies + my %cookies=CGI::Cookie->parse($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' => $c); + } + if ($r->header_only) { + $r->send_http_header; + return OK; + } # -------------------------------------------------------- Menu script and info - - my $windowinfo=&Apache::lonmenu::close(); - $windowinfo.=&Apache::lonnavmaps::close(); + # ---------------------------------------------------------------- Get handover - my $token = &Apache::lonnet::reply('tmpput:'.join('&',$ENV{'REMOTE_ADDR'},$env{'user.domain'},$env{'user.name'},$env{'form.role'}),$env{'form.otherserver'}); - my $switch=''; - my $bodytag=&Apache::loncommon::bodytag('Switching Server ...'); -# --------------------------------------------------------------- Screen Output - $r->print(< - The LearningOnline Network with CAPA Logout - $switch - - $bodytag - $windowinfo - - -ENDDOCUMENT + my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie,$offloadto,$dom_balancers); + my $only_body = 0; + ($is_balancer,undef,$setcookie,$offloadto,$dom_balancers) = + &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver'); + if ($is_balancer && $setcookie && $env{'form.otherserver'}) { + + # Set a balancer cookie unless browser already sent LON-CAPA load balancer + # cookie which points at the target server + my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1); + + if (($found_server eq $env{'form.otherserver'}) && + ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) { + $only_body = 1; + } else { + $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'}, + $env{'user.name'},$env{'user.domain'}); + } + } + if ((!$is_balancer) && ($env{'request.balancercookie'})) { + $otherbalcookie = $env{'request.balancercookie'}; + } - &Apache::lonnet::flushcourselogs(); - return OK; + my %info=('ip' => $ENV{'REMOTE_ADDR'}, + 'domain' => $env{'user.domain'}, + 'username' => $env{'user.name'}, + 'home' => $env{'user.home'}, + 'role' => $env{'form.role'}, + 'server' => $r->dir_config('lonHostID'), + 'balancer' => $is_balancer, + 'dom_balancers' => $dom_balancers, + 'offloadto' => ''); + if (ref($offloadto) eq 'HASH') { + foreach my $key (keys(%{$offloadto})) { + if (ref($offloadto->{$key}) eq 'ARRAY') { + $info{'offloadto'} .= $key.'='.join(',',@{$offloadto->{$key}}).'&'; + } + } + $info{'offloadto'} =~ s/\&$//; + } elsif (ref($offloadto) eq 'ARRAY') { + $info{'offloadto'} = join(',',@{$offloadto}); + } + if ($newcookieid) { + $info{'balcookie'} = $newcookieid; + } elsif ($otherbalcookie) { + $info{'otherbalcookie'} = $otherbalcookie; + } + if ($env{'form.origurl'}) { + $info{'origurl'} = $env{'form.origurl'}; + } + if ($env{'form.symb'}) { + $info{'symb'} = $env{'form.symb'}; + } + if ($env{'request.sso.login'}) { + $info{'sso.login'} = $env{'request.sso.login'}; + } + if ($env{'request.sso.reloginserver'}) { + $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'}; + } + if ($env{'request.linkprot'}) { + $info{'linkprot'} = $env{'request.linkprot'}; + } + if ($env{'request.deeplink.login'}) { + $info{'deeplink.login'} = $env{'request.deeplink.login'}; + if ($env{'request.linkkey'}) { + $info{'linkkey'} = $env{'request.linkkey'}; + } + } + if ($env{'request.lti.login'}) { + $info{'lti.login'} = $env{'request.lti.login'}; + } + if ($env{'request.lti.uri'}) { + $info{'lti.uri'} = $env{'request.lti.uri'}; + } + if ($env{'request.lti.reqcrs'}) { + $info{'lti.reqcrs'} = $env{'request.lti.reqcrs'}; + } + if ($env{'request.lti.reqrole'}) { + $info{'lti.reqrole'} = $env{'request.lti.reqrole'}; + } + if ($env{'request.lti.selfenrollrole'}) { + $info{'lti.selfenrollrole'} = $env{'request.lti.selfenrollrole'}; + } + if ($env{'request.lti.sourcecrs'}) { + $info{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'}; + } + if ($env{'request.lti.passbackid'}) { + $info{'lti.passbackid'} = $env{'request.lti.passbackid'}; + } + if ($env{'request.lti.passbackurl'}) { + $info{'lti.passbackurl'} = $env{'request.lti.passbackurl'}; + } + if ($env{'request.lti.rosterid'}) { + $info{'lti.rosterid'} = $env{'request.lti.rosterid'}; + } + if ($env{'request.lti.rosterurl'}) { + $info{'lti.rosterurl'} = $env{'request.lti.rosterurl'}; + } + if ($env{'request.lti.target'}) { + $info{'lti.target'} = $env{'request.lti.target'}; + } + my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'}); + my $url =$protocol.'://'.$switch_to.'/adm/login?'. + 'domain='.$env{'user.domain'}. + '&username='.$env{'user.name'}. + '&token='.$token; +# --------------------------------------------------------------- Screen Output + return &do_redirect($r, $url, $only_body); } 1;