--- loncom/auth/switchserver.pm 2007/08/25 00:52:47 1.14
+++ loncom/auth/switchserver.pm 2021/05/04 18:47:37 1.55
@@ -1,7 +1,7 @@
# The LearningOnline Network
# Switch Servers Handler
#
-# $Id: switchserver.pm,v 1.14 2007/08/25 00:52:47 albertel Exp $
+# $Id: switchserver.pm,v 1.55 2021/05/04 18:47:37 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -29,11 +29,12 @@
package Apache::switchserver;
use strict;
-use Apache::Constants qw(:common);
+use Apache::Constants qw(:common :remotehost);
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) = @_;
@@ -42,35 +43,56 @@ sub init_env {
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 $handle=&LONCAPA::clean_handle($lonid->value);
- 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 $r->dir_config('lonIDsDir')."/$handle.id";
}
sub do_redirect {
my ($r,$url,$only_body,$extra_text) = @_;
$r->send_http_header;
- my $switch='<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$url.'">';
+ my $delay = 0.5;
+ if ($only_body) {
+ $delay = 0;
+ }
my $start_page =
- &Apache::loncommon::start_page('Switching Server ...', $switch,
- {'no_inline_link' => 1,
+ &Apache::loncommon::start_page('Switching Server ...',undef,
+ {'redirect' => [$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 $newcookieid;
+}
+sub flush_course_logs {
+ &Apache::lonnet::flushcourselogs();
+ return OK;
}
sub handler {
@@ -80,69 +102,250 @@ sub handler {
if (!defined($handle)) { return FORBIDDEN; }
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
- ['otherserver','role']);
+ ['otherserver','role','origurl','symb']);
my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
- if (!$env{'form.otherserver'}) {
- $env{'form.otherserver'}=&Apache::lonnet::spareserver(30000,undef,1);
+ if (! $env{'form.otherserver'}) {
+ $env{'form.otherserver'} =
+ &Apache::lonnet::find_existing_session($env{'user.domain'},
+ $env{'user.name'});
+ if (! $env{'form.otherserver'}) {
+ $env{'form.otherserver'} =
+ &Apache::lonnet::spareserver($r,30000,undef,1);
+ }
$switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
}
if (!defined($switch_to)) { 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'}};
+ }
+ unless ($env{'form.otherserver'} eq $r->dir_config('lonHostID')) {
+ my $alias = &Apache::lonnet::use_proxy_alias($r,$env{'form.otherserver'});
+ $switch_to = $alias if ($alias ne '');
+ }
+ }
+
if ($env{'user.name'} eq 'public'
&& $env{'user.domain'} eq 'public') {
- my $url = 'http://'.$switch_to.'/'.$r->uri;
+ 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,$url,1)
}
- if ($env{'form.role'} &&
- !exists($env{'user.role.'.$env{'form.role'}})) { return FORBIDDEN; }
+ 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($handle);
- my %temp=('switchserver' => time.':'.$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)";
+ }
+ my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
+ $logmsg .= ' '.$ip;
&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');
- #expire the cookie
- my $c = new CGI::Cookie(-name => 'lonID',
- -value => '',
- -expires => '-10y',);
- $r->header_out('Set-cookie' => $c);
- $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().
- &Apache::lonnavmaps::close();
+
# ---------------------------------------------------------------- Get handover
- my %info=('ip' => $ENV{'REMOTE_ADDR'},
- 'domain' => $env{'user.domain'},
- 'username' => $env{'user.name'},
- 'role' => $env{'form.role'},
- 'server' => $r->dir_config('lonHostID'));
+ my ($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'};
+ }
+
+ my %info=('ip' => $ip,
+ '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 $url ='http://'.$switch_to.'/adm/login?'.
+ my $url =$protocol.'://'.$switch_to.'/adm/login?'.
'domain='.$env{'user.domain'}.
'&username='.$env{'user.name'}.
'&token='.$token;
# --------------------------------------------------------------- Screen Output
- &Apache::lonnet::flushcourselogs();
- return &do_redirect($r,$url,0,$windowinfo);
+ return &do_redirect($r, $url, $only_body);
}
1;