Annotation of loncom/auth/switchserver.pm, revision 1.32

1.1       albertel    1: # The LearningOnline Network
                      2: # Switch Servers Handler
                      3: #
1.32    ! raeburn     4: # $Id: switchserver.pm,v 1.31 2011/08/02 14:17:13 raeburn Exp $
1.1       albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
                     28: 
                     29: package Apache::switchserver;
                     30: 
                     31: use strict;
                     32: use Apache::Constants qw(:common);
                     33: use Apache::lonnet;
                     34: use Apache::lonmenu;
                     35: use CGI::Cookie();
                     36: use Apache::lonlocal;
1.28      raeburn    37: use LONCAPA qw(:DEFAULT :match);
1.1       albertel   38: 
                     39: sub init_env {
                     40:     my ($r) = @_;
1.5       albertel   41:     
                     42:     if (-e $env{'user.environment'}) {
                     43: 	return  $env{'user.environment'};
                     44:     }
1.1       albertel   45:     my $requrl=$r->uri;
1.18      albertel   46:     my $handle= &Apache::lonnet::check_for_valid_session($r);
                     47:     if ($handle ne '') {
1.1       albertel   48: 	return undef;
                     49:     }
1.18      albertel   50:     my $lonidsdir=$r->dir_config('lonIDsDir');
1.1       albertel   51:     &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
                     52:     
1.5       albertel   53:     return $r->dir_config('lonIDsDir')."/$handle.id";
1.1       albertel   54: }
                     55: 
1.14      albertel   56: sub do_redirect {
                     57:     my ($r,$url,$only_body,$extra_text) = @_;
                     58:     $r->send_http_header;
                     59:     my $start_page = 
1.16      raeburn    60: 	&Apache::loncommon::start_page('Switching Server ...',undef,
                     61: 				       {'redirect'       => [0.5,$url],
1.14      albertel   62: 					'only_body'      => $only_body,});
                     63:     my $end_page   = &Apache::loncommon::end_page();
                     64:     $r->print($start_page.$extra_text.$end_page);
1.30      raeburn    65:     unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
                     66:         $r->register_cleanup(\&flush_course_logs);
                     67:     }
1.14      albertel   68:     return OK;
1.30      raeburn    69: }
1.14      albertel   70: 
1.30      raeburn    71: sub flush_course_logs {
                     72:     &Apache::lonnet::flushcourselogs();
                     73:     return OK;
1.14      albertel   74: }
                     75: 
1.1       albertel   76: sub handler {
1.5       albertel   77:     my ($r) = @_;
1.1       albertel   78:     
                     79:     my $handle=&init_env($r);
                     80:     if (!defined($handle)) { return FORBIDDEN; }
                     81: 
                     82:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.22      raeburn    83: 				['otherserver','role','origurl','symb']);
1.5       albertel   84: 
1.13      albertel   85:     my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.17      albertel   86:     if (! $env{'form.otherserver'}) {
                     87: 	$env{'form.otherserver'} =	
                     88: 	    &Apache::lonnet::find_existing_session($env{'user.domain'},
                     89: 						   $env{'user.name'});
                     90: 	if (! $env{'form.otherserver'}) {
                     91: 	    $env{'form.otherserver'} = 
                     92: 		&Apache::lonnet::spareserver(30000,undef,1);
                     93: 	}
1.13      albertel   94: 	$switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.4       albertel   95:     }
1.5       albertel   96: 
1.1       albertel   97:     if (!defined($switch_to)) { return FORBIDDEN; }
1.4       albertel   98: 
1.14      albertel   99:     if ($env{'user.name'} eq 'public'
                    100: 	&& $env{'user.domain'} eq 'public') {
1.19      albertel  101: 	my $url = 'http://'.$switch_to.$r->uri;
1.14      albertel  102: 	return &do_redirect($r,$url,1)
                    103:     }
                    104: 
1.28      raeburn   105:     my $skip_canhost_check = '';
                    106:     if ($env{'form.role'}) {
                    107:         if (!exists($env{'user.role.'.$env{'form.role'}})) {
                    108:             return FORBIDDEN;
                    109:         } else {
                    110:             my $now = time;
                    111:             my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
                    112:             if (($start && $start > $now) || ($end && $end < $now)) {
                    113:                 return FORBIDDEN;
                    114:             } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
                    115:                 if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
                    116:                     $skip_canhost_check = 1;
                    117:                 }
1.31      raeburn   118:             } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
1.28      raeburn   119:                 if (&Apache::lonnet::homeserver($2,$1) eq $env{'form.otherserver'}) {
                    120:                     $skip_canhost_check = 1; 
                    121:                 }
                    122:             }
                    123:         }
                    124:     }
                    125: 
                    126:     unless ($skip_canhost_check) {
                    127:         my $canhost = 1;
                    128:         my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
                    129:         my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.29      raeburn   130:         my @intdoms;
                    131:         my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
                    132:         if (ref($internet_names) eq 'ARRAY') {
                    133:             @intdoms = @{$internet_names};
                    134:         }
1.28      raeburn   135:         unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
                    136:             my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to);
                    137:             my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
                    138:             my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
                    139:             my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
                    140:             my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
                    141:             $canhost = 
                    142:                 &Apache::lonnet::can_host_session($env{'user.domain'},
                    143:                                                   $env{'form.otherserver'},
                    144:                                                   $remoterev,
                    145:                                                   $udomdefaults{'remotesessions'},
                    146:                                                   $defdomdefaults{'hostedsessions'});
                    147:         }
                    148:         unless ($canhost) { return FORBIDDEN; }
1.26      raeburn   149:     }
                    150: 
1.1       albertel  151:     #remove session env, and log event
1.5       albertel  152:     unlink($handle);
1.1       albertel  153:     my %temp=('switchserver' => time.':'.$env{'form.otherserver'},
                    154: 	      $env{'form.role'});
                    155:     &Apache::lonnet::put('email_status',\%temp);
                    156:     &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
                    157: 			 $env{'user.home'},
                    158: 			 "Switch Server to $env{'form.otherserver'} with role $env{'form.role'} $ENV{'REMOTE_ADDR'}");
                    159: 
                    160:     &Apache::loncommon::content_type($r,'text/html');
1.12      albertel  161: 
                    162:     #expire the cookie
                    163:     my $c = new CGI::Cookie(-name    => 'lonID',
                    164: 			    -value   => '',
                    165: 			    -expires => '-10y',);
                    166:     $r->header_out('Set-cookie' => $c);
1.20      albertel  167: 
                    168:     if ($r->header_only) {
                    169: 	$r->send_http_header;
                    170: 	return OK;
                    171:     }
1.1       albertel  172: # -------------------------------------------------------- Menu script and info
                    173: 	   
                    174: # ---------------------------------------------------------------- Get handover
                    175: 
1.32    ! raeburn   176:     my ($is_balancer) = &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'});
1.3       albertel  177:     my %info=('ip'       => $ENV{'REMOTE_ADDR'},
                    178: 	      'domain'   => $env{'user.domain'},
                    179: 	      'username' => $env{'user.name'},
                    180: 	      'role'     => $env{'form.role'},
1.32    ! raeburn   181: 	      'server'   => $r->dir_config('lonHostID'),
        !           182: 	      'balancer' => $is_balancer);
1.22      raeburn   183:     if ($env{'form.origurl'}) {
                    184:         $info{'origurl'} = $env{'form.origurl'};
                    185:     }
                    186:     if ($env{'form.symb'}) {
                    187:         $info{'symb'} = $env{'form.symb'};
                    188:     }
1.8       albertel  189:     if ($env{'request.sso.login'}) {
                    190: 	$info{'sso.login'} = $env{'request.sso.login'};
                    191:     }
1.11      raeburn   192:     if ($env{'request.sso.reloginserver'}) {
                    193:         $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
                    194:     }
1.3       albertel  195:     my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.14      albertel  196:     my $url ='http://'.$switch_to.'/adm/login?'.
                    197: 	'domain='.$env{'user.domain'}.
1.21      albertel  198: 	'&amp;username='.$env{'user.name'}.
                    199: 	'&amp;token='.$token;
1.1       albertel  200: # --------------------------------------------------------------- Screen Output
1.24      droeschl  201:     return &do_redirect($r, $url, 0);
1.1       albertel  202: }
                    203: 
                    204: 1;
                    205: __END__
                    206: 
                    207: 
                    208: 
                    209: 
                    210: 
                    211: 
                    212: 
                    213: 

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