Annotation of loncom/auth/switchserver.pm, revision 1.35.2.1
1.1 albertel 1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
1.35.2.1! raeburn 4: # $Id: switchserver.pm,v 1.35 2016/12/16 15:31:11 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;
1.35.2.1! raeburn 34: use Digest::MD5 qw(md5_hex);
1.1 albertel 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);
1.35.2.1! raeburn 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;
1.35.2.1! raeburn 59: my $delay = 0.5;
! 60: if ($only_body) {
! 61: $delay = 0;
! 62: }
1.14 albertel 63: my $start_page =
1.16 raeburn 64: &Apache::loncommon::start_page('Switching Server ...',undef,
1.35.2.1! raeburn 65: {'redirect' => [$delay,$url],
1.14 albertel 66: 'only_body' => $only_body,});
67: my $end_page = &Apache::loncommon::end_page();
68: $r->print($start_page.$extra_text.$end_page);
1.30 raeburn 69: unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
70: $r->register_cleanup(\&flush_course_logs);
71: }
1.14 albertel 72: return OK;
1.30 raeburn 73: }
1.14 albertel 74:
1.35.2.1! raeburn 75: sub balancer_cookieid {
! 76: my ($r,$desthost,$uname,$udom) = @_;
! 77: my @hosts = &Apache::lonnet::current_machine_ids();
! 78: my $newcookieid;
! 79: unless (grep(/^\Q$desthost\E$/,@hosts)) {
! 80: my $balancedir=$r->dir_config('lonBalanceDir');
! 81: $newcookieid = &md5_hex(&md5_hex(time.{}.rand().$$));
! 82: my $cookie = $udom.'_'.$uname.'_'.$newcookieid;
! 83: my $balcookie = "balanceID=$cookie; path=/; HttpOnly;";
! 84: if (open(my $fh,'>',"$balancedir/$cookie.id")) {
! 85: print $fh $desthost;
! 86: close($fh);
! 87: $r->headers_out->add('Set-cookie' => $balcookie);
! 88: }
! 89: }
! 90: return $newcookieid;
! 91: }
! 92:
1.30 raeburn 93: sub flush_course_logs {
94: &Apache::lonnet::flushcourselogs();
95: return OK;
1.14 albertel 96: }
97:
1.1 albertel 98: sub handler {
1.5 albertel 99: my ($r) = @_;
1.1 albertel 100:
101: my $handle=&init_env($r);
102: if (!defined($handle)) { return FORBIDDEN; }
103:
104: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.22 raeburn 105: ['otherserver','role','origurl','symb']);
1.5 albertel 106:
1.13 albertel 107: my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.17 albertel 108: if (! $env{'form.otherserver'}) {
109: $env{'form.otherserver'} =
110: &Apache::lonnet::find_existing_session($env{'user.domain'},
111: $env{'user.name'});
112: if (! $env{'form.otherserver'}) {
113: $env{'form.otherserver'} =
114: &Apache::lonnet::spareserver(30000,undef,1);
115: }
1.13 albertel 116: $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.4 albertel 117: }
1.5 albertel 118:
1.1 albertel 119: if (!defined($switch_to)) { return FORBIDDEN; }
1.4 albertel 120:
1.33 raeburn 121: my $protocol = 'http';
122: if ($env{'form.otherserver'}) {
123: if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') {
124: $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}};
125: }
1.35.2.1! raeburn 126: }
1.33 raeburn 127:
1.14 albertel 128: if ($env{'user.name'} eq 'public'
129: && $env{'user.domain'} eq 'public') {
1.33 raeburn 130: my $url = $protocol.'://'.$switch_to.$r->uri;
1.14 albertel 131: return &do_redirect($r,$url,1)
132: }
133:
1.28 raeburn 134: my $skip_canhost_check = '';
1.35.2.1! raeburn 135: my $now = time;
1.28 raeburn 136: if ($env{'form.role'}) {
137: if (!exists($env{'user.role.'.$env{'form.role'}})) {
1.35 raeburn 138: delete($env{'form.role'});
1.28 raeburn 139: } else {
140: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
141: if (($start && $start > $now) || ($end && $end < $now)) {
1.35 raeburn 142: delete($env{'form.role'});
1.28 raeburn 143: } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
144: if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
145: $skip_canhost_check = 1;
146: }
1.31 raeburn 147: } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
1.28 raeburn 148: if (&Apache::lonnet::homeserver($2,$1) eq $env{'form.otherserver'}) {
149: $skip_canhost_check = 1;
150: }
151: }
152: }
153: }
154:
155: unless ($skip_canhost_check) {
156: my $canhost = 1;
157: my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
158: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.29 raeburn 159: my @intdoms;
160: my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
161: if (ref($internet_names) eq 'ARRAY') {
162: @intdoms = @{$internet_names};
163: }
1.28 raeburn 164: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
165: my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to);
166: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
167: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
168: my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
169: my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
170: $canhost =
171: &Apache::lonnet::can_host_session($env{'user.domain'},
172: $env{'form.otherserver'},
173: $remoterev,
174: $udomdefaults{'remotesessions'},
175: $defdomdefaults{'hostedsessions'});
176: }
177: unless ($canhost) { return FORBIDDEN; }
1.26 raeburn 178: }
179:
1.1 albertel 180: #remove session env, and log event
1.5 albertel 181: unlink($handle);
1.35.2.1! raeburn 182: my %temp=('switchserver' => $now.':'.$env{'form.otherserver'},
1.1 albertel 183: $env{'form.role'});
184: &Apache::lonnet::put('email_status',\%temp);
1.34 raeburn 185: my $logmsg = "Switch Server to $env{'form.otherserver'}";
186: if ($env{'form.role'}) {
187: $logmsg .= " with role: $env{'form.role'}";
188: } else {
189: $logmsg .= " (no role)";
190: }
191: $logmsg .= ' '.$ENV{'REMOTE_ADDR'};
1.1 albertel 192: &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
1.34 raeburn 193: $env{'user.home'},$logmsg);
1.1 albertel 194:
195: &Apache::loncommon::content_type($r,'text/html');
1.12 albertel 196:
197: #expire the cookie
198: my $c = new CGI::Cookie(-name => 'lonID',
199: -value => '',
200: -expires => '-10y',);
201: $r->header_out('Set-cookie' => $c);
1.20 albertel 202:
203: if ($r->header_only) {
204: $r->send_http_header;
205: return OK;
206: }
1.1 albertel 207: # -------------------------------------------------------- Menu script and info
208:
209: # ---------------------------------------------------------------- Get handover
210:
1.35.2.1! raeburn 211: my $newcookieid;
! 212: my $only_body = 0;
! 213: my ($is_balancer,$posshost,$setcookie) =
! 214: &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'});
! 215: if ($is_balancer && $setcookie && $env{'form.otherserver'}) {
! 216: # Set a balancer cookie unless browser already sent LON-CAPA load balancer
! 217: # cookie which points at the target server
! 218: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
! 219:
! 220: if (($found_server eq $env{'form.otherserver'}) &&
! 221: ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
! 222: $only_body = 1;
! 223: } else {
! 224: $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'},
! 225: $env{'user.name'},$env{'user.domain'});
! 226: }
! 227: }
! 228:
1.3 albertel 229: my %info=('ip' => $ENV{'REMOTE_ADDR'},
230: 'domain' => $env{'user.domain'},
231: 'username' => $env{'user.name'},
232: 'role' => $env{'form.role'},
1.32 raeburn 233: 'server' => $r->dir_config('lonHostID'),
234: 'balancer' => $is_balancer);
1.35.2.1! raeburn 235: if ($newcookieid) {
! 236: $info{'balcookie'} = $newcookieid;
! 237: }
1.22 raeburn 238: if ($env{'form.origurl'}) {
239: $info{'origurl'} = $env{'form.origurl'};
240: }
241: if ($env{'form.symb'}) {
242: $info{'symb'} = $env{'form.symb'};
243: }
1.8 albertel 244: if ($env{'request.sso.login'}) {
245: $info{'sso.login'} = $env{'request.sso.login'};
246: }
1.11 raeburn 247: if ($env{'request.sso.reloginserver'}) {
248: $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
249: }
1.3 albertel 250: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.33 raeburn 251: my $url =$protocol.'://'.$switch_to.'/adm/login?'.
1.14 albertel 252: 'domain='.$env{'user.domain'}.
1.21 albertel 253: '&username='.$env{'user.name'}.
254: '&token='.$token;
1.1 albertel 255: # --------------------------------------------------------------- Screen Output
1.35.2.1! raeburn 256: return &do_redirect($r, $url, $only_body);
1.1 albertel 257: }
258:
259: 1;
260: __END__
261:
262:
263:
264:
265:
266:
267:
268:
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