version 1.1388, 2018/11/01 18:20:40
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version 1.1389, 2018/11/24 16:19:20
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Line 73 package Apache::lonnet;
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Line 73 package Apache::lonnet;
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use strict; |
use strict; |
use HTTP::Date; |
use HTTP::Date; |
use Image::Magick; |
use Image::Magick; |
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use CGI::Cookie; |
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use Encode; |
use Encode; |
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Line 1028 sub find_existing_session {
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Line 1028 sub find_existing_session {
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return; |
return; |
} |
} |
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# check if user's browser sent load balancer cookie and server still has session |
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# and is not overloaded. |
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sub check_for_balancer_cookie { |
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my ($r,$update_mtime) = @_; |
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my ($otherserver,$cookie); |
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my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); |
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if (exists($cookies{'balanceID'})) { |
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my $balid = $cookies{'balanceID'}; |
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$cookie=&LONCAPA::clean_handle($balid->value); |
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my $balancedir=$r->dir_config('lonBalanceDir'); |
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if ((-d $balancedir) && (-e "$balancedir/$cookie.id")) { |
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if ($cookie =~ /^($match_domain)_($match_username)_[a-f0-9]+$/) { |
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my ($possudom,$possuname) = ($1,$2); |
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my $has_session = 0; |
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if ((&domain($possudom) ne '') && |
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(&homeserver($possuname,$possudom) ne 'no_host')) { |
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my $try_server; |
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my $opened = open(my $idf,'+<',"$balancedir/$cookie.id"); |
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if ($opened) { |
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flock($idf,LOCK_SH); |
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while (my $line = <$idf>) { |
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chomp($line); |
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if (&hostname($line) ne '') { |
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$try_server = $line; |
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last; |
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} |
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} |
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close($idf); |
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if (($try_server) && |
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(&has_user_session($try_server,$possudom,$possuname))) { |
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my $lowest_load = 30000; |
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($otherserver,$lowest_load) = |
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&compare_server_load($try_server,undef,$lowest_load); |
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if ($otherserver ne '' && $lowest_load < 100) { |
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$has_session = 1; |
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} else { |
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undef($otherserver); |
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} |
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} |
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} |
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} |
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if ($has_session) { |
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if ($update_mtime) { |
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my $atime = my $mtime = time; |
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utime($atime,$mtime,"$balancedir/$cookie.id"); |
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} |
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} else { |
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unlink("$balancedir/$cookie.id"); |
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} |
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} |
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} |
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} |
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return ($otherserver,$cookie); |
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} |
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sub delbalcookie { |
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my ($cookie,$balancer) =@_; |
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if ($cookie =~ /^($match_domain)\_($match_username)\_[a-f0-9]{32}$/) { |
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my ($udom,$uname) = ($1,$2); |
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my $uprimary_id = &domain($udom,'primary'); |
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my $uintdom = &internet_dom($uprimary_id); |
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my $intdom = &internet_dom($balancer); |
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my $serverhomedom = &host_domain($balancer); |
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if (($uintdom ne '') && ($uintdom eq $intdom)) { |
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return &reply("delbalcookie:$cookie",$balancer); |
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} |
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} |
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} |
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# -------------------------------- ask if server already has a session for user |
# -------------------------------- ask if server already has a session for user |
sub has_user_session { |
sub has_user_session { |
my ($lonid,$udom,$uname) = @_; |
my ($lonid,$udom,$uname) = @_; |
Line 1063 sub choose_server {
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Line 1132 sub choose_server {
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if (ref($balancers) eq 'HASH') { |
if (ref($balancers) eq 'HASH') { |
next if (exists($balancers->{$lonhost})); |
next if (exists($balancers->{$lonhost})); |
} |
} |
} |
} |
my $loginvia; |
my $loginvia; |
if ($checkloginvia) { |
if ($checkloginvia) { |
$loginvia = $domconfhash{$udom.'.login.loginvia_'.$lonhost}; |
$loginvia = $domconfhash{$udom.'.login.loginvia_'.$lonhost}; |
Line 1365 sub get_lonbalancer_config {
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Line 1434 sub get_lonbalancer_config {
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sub check_loadbalancing { |
sub check_loadbalancing { |
my ($uname,$udom,$caller) = @_; |
my ($uname,$udom,$caller) = @_; |
my ($is_balancer,$currtargets,$currrules,$dom_in_use,$homeintdom, |
my ($is_balancer,$currtargets,$currrules,$dom_in_use,$homeintdom, |
$rule_in_effect,$offloadto,$otherserver); |
$rule_in_effect,$offloadto,$otherserver,$setcookie); |
my $lonhost = $perlvar{'lonHostID'}; |
my $lonhost = $perlvar{'lonHostID'}; |
my @hosts = ¤t_machine_ids(); |
my @hosts = ¤t_machine_ids(); |
my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); |
my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); |
Line 1392 sub check_loadbalancing {
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Line 1461 sub check_loadbalancing {
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} |
} |
} |
} |
if (ref($result) eq 'HASH') { |
if (ref($result) eq 'HASH') { |
($is_balancer,$currtargets,$currrules) = |
($is_balancer,$currtargets,$currrules,$setcookie) = |
&check_balancer_result($result,@hosts); |
&check_balancer_result($result,@hosts); |
if ($is_balancer) { |
if ($is_balancer) { |
if (ref($currrules) eq 'HASH') { |
if (ref($currrules) eq 'HASH') { |
Line 1453 sub check_loadbalancing {
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Line 1522 sub check_loadbalancing {
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} |
} |
} |
} |
if (ref($result) eq 'HASH') { |
if (ref($result) eq 'HASH') { |
($is_balancer,$currtargets,$currrules) = |
($is_balancer,$currtargets,$currrules,$setcookie) = |
&check_balancer_result($result,@hosts); |
&check_balancer_result($result,@hosts); |
if ($is_balancer) { |
if ($is_balancer) { |
if (ref($currrules) eq 'HASH') { |
if (ref($currrules) eq 'HASH') { |
Line 1519 sub check_loadbalancing {
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Line 1588 sub check_loadbalancing {
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$is_balancer = 0; |
$is_balancer = 0; |
if ($uname ne '' && $udom ne '') { |
if ($uname ne '' && $udom ne '') { |
if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) { |
if (($env{'user.name'} eq $uname) && ($env{'user.domain'} eq $udom)) { |
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&appenv({'user.loadbalexempt' => $lonhost, |
&appenv({'user.loadbalexempt' => $lonhost, |
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'user.loadbalcheck.time' => time}); |
'user.loadbalcheck.time' => time}); |
} |
} |
} |
} |
} |
} |
} |
} |
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unless ($homeintdom) { |
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undef($setcookie); |
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} |
} |
} |
return ($is_balancer,$otherserver); |
return ($is_balancer,$otherserver,$setcookie); |
} |
} |
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sub check_balancer_result { |
sub check_balancer_result { |
my ($result,@hosts) = @_; |
my ($result,@hosts) = @_; |
my ($is_balancer,$currtargets,$currrules); |
my ($is_balancer,$currtargets,$currrules,$setcookie); |
if (ref($result) eq 'HASH') { |
if (ref($result) eq 'HASH') { |
if ($result->{'lonhost'} ne '') { |
if ($result->{'lonhost'} ne '') { |
my $currbalancer = $result->{'lonhost'}; |
my $currbalancer = $result->{'lonhost'}; |
Line 1548 sub check_balancer_result {
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Line 1619 sub check_balancer_result {
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$is_balancer = 1; |
$is_balancer = 1; |
$currrules = $result->{$key}{'rules'}; |
$currrules = $result->{$key}{'rules'}; |
$currtargets = $result->{$key}{'targets'}; |
$currtargets = $result->{$key}{'targets'}; |
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$setcookie = $result->{$key}{'cookie'}; |
last; |
last; |
} |
} |
} |
} |
} |
} |
} |
} |
return ($is_balancer,$currtargets,$currrules); |
return ($is_balancer,$currtargets,$currrules,$setcookie); |
} |
} |
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sub get_loadbalancer_targets { |
sub get_loadbalancer_targets { |