Annotation of loncom/auth/switchserver.pm, revision 1.43
1.1 albertel 1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
1.43 ! raeburn 4: # $Id: switchserver.pm,v 1.42 2018/11/24 16:19:04 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;
1.42 raeburn 35: use Digest::MD5 qw(md5_hex);
1.1 albertel 36: use CGI::Cookie();
37: use Apache::lonlocal;
1.28 raeburn 38: use LONCAPA qw(:DEFAULT :match);
1.1 albertel 39:
40: sub init_env {
41: my ($r) = @_;
1.5 albertel 42:
43: if (-e $env{'user.environment'}) {
44: return $env{'user.environment'};
45: }
1.1 albertel 46: my $requrl=$r->uri;
1.18 albertel 47: my $handle= &Apache::lonnet::check_for_valid_session($r);
48: if ($handle ne '') {
1.1 albertel 49: return undef;
50: }
1.18 albertel 51: my $lonidsdir=$r->dir_config('lonIDsDir');
1.1 albertel 52: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
1.42 raeburn 53:
1.5 albertel 54: return $r->dir_config('lonIDsDir')."/$handle.id";
1.1 albertel 55: }
56:
1.14 albertel 57: sub do_redirect {
58: my ($r,$url,$only_body,$extra_text) = @_;
59: $r->send_http_header;
60: my $start_page =
1.16 raeburn 61: &Apache::loncommon::start_page('Switching Server ...',undef,
62: {'redirect' => [0.5,$url],
1.14 albertel 63: 'only_body' => $only_body,});
64: my $end_page = &Apache::loncommon::end_page();
65: $r->print($start_page.$extra_text.$end_page);
1.30 raeburn 66: unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
67: $r->register_cleanup(\&flush_course_logs);
68: }
1.14 albertel 69: return OK;
1.30 raeburn 70: }
1.14 albertel 71:
1.30 raeburn 72: sub flush_course_logs {
73: &Apache::lonnet::flushcourselogs();
74: return OK;
1.14 albertel 75: }
76:
1.1 albertel 77: sub handler {
1.5 albertel 78: my ($r) = @_;
1.1 albertel 79:
80: my $handle=&init_env($r);
81: if (!defined($handle)) { return FORBIDDEN; }
82:
83: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.22 raeburn 84: ['otherserver','role','origurl','symb']);
1.5 albertel 85:
1.13 albertel 86: my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.17 albertel 87: if (! $env{'form.otherserver'}) {
88: $env{'form.otherserver'} =
89: &Apache::lonnet::find_existing_session($env{'user.domain'},
90: $env{'user.name'});
91: if (! $env{'form.otherserver'}) {
92: $env{'form.otherserver'} =
93: &Apache::lonnet::spareserver(30000,undef,1);
94: }
1.13 albertel 95: $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.4 albertel 96: }
1.5 albertel 97:
1.1 albertel 98: if (!defined($switch_to)) { return FORBIDDEN; }
1.4 albertel 99:
1.33 raeburn 100: my $protocol = 'http';
101: if ($env{'form.otherserver'}) {
102: if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') {
103: $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}};
104: }
1.42 raeburn 105: }
1.33 raeburn 106:
1.14 albertel 107: if ($env{'user.name'} eq 'public'
108: && $env{'user.domain'} eq 'public') {
1.33 raeburn 109: my $url = $protocol.'://'.$switch_to.$r->uri;
1.36 raeburn 110: unlink($handle);
111: #expire the cookie
112: my $c = new CGI::Cookie(-name => 'lonPubID',
113: -value => '',
114: -expires => '-10y',);
115: $r->header_out('Set-cookie' => $c);
1.14 albertel 116: return &do_redirect($r,$url,1)
117: }
118:
1.28 raeburn 119: my $skip_canhost_check = '';
120: if ($env{'form.role'}) {
121: if (!exists($env{'user.role.'.$env{'form.role'}})) {
1.35 raeburn 122: delete($env{'form.role'});
1.28 raeburn 123: } else {
124: my $now = time;
125: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
126: if (($start && $start > $now) || ($end && $end < $now)) {
1.35 raeburn 127: delete($env{'form.role'});
1.28 raeburn 128: } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
129: if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
130: $skip_canhost_check = 1;
131: }
1.31 raeburn 132: } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
1.37 raeburn 133: my ($audom,$auname) = ($1,$2);
134: if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
135: if ((&Apache::lonnet::will_trust('othcoau',$audom,$env{'user.domain'})) &&
136: (&Apache::lonnet::will_trust('coremau',$env{'user.domain'},$audom))) {
137: $skip_canhost_check = 1;
138: }
1.28 raeburn 139: }
140: }
141: }
142: }
143:
144: unless ($skip_canhost_check) {
145: my $canhost = 1;
146: my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
147: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.29 raeburn 148: my @intdoms;
149: my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
150: if (ref($internet_names) eq 'ARRAY') {
151: @intdoms = @{$internet_names};
152: }
1.28 raeburn 153: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
154: my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to);
155: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
156: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
157: my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
158: my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
159: $canhost =
160: &Apache::lonnet::can_host_session($env{'user.domain'},
161: $env{'form.otherserver'},
162: $remoterev,
163: $udomdefaults{'remotesessions'},
164: $defdomdefaults{'hostedsessions'});
165: }
166: unless ($canhost) { return FORBIDDEN; }
1.26 raeburn 167: }
168:
1.1 albertel 169: #remove session env, and log event
1.41 raeburn 170: if (unlink($handle)) {
171: if ($env{'user.linkedenv'} ne '') {
172: my $lonidsdir=$r->dir_config('lonIDsDir');
173: if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
174: (-l "$lonidsdir/$env{'user.linkedenv'}.id") &&
175: (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq $handle)) {
176: unlink("$lonidsdir/$env{'user.linkedenv'}.id");
177: }
1.36 raeburn 178: }
179: }
1.42 raeburn 180: my $now = time;
181: my %temp=('switchserver' => $now.':'.$env{'form.otherserver'},
1.1 albertel 182: $env{'form.role'});
183: &Apache::lonnet::put('email_status',\%temp);
1.34 raeburn 184: my $logmsg = "Switch Server to $env{'form.otherserver'}";
185: if ($env{'form.role'}) {
186: $logmsg .= " with role: $env{'form.role'}";
1.39 raeburn 187: } elsif (($env{'form.lti.reqcrs'}) && ($env{'form.lti.reqrole'} eq 'cc')) {
188: $logmsg .= " to create new LTI course";
189: } elsif ($env{'form.lti.selfenrollrole'}) {
190: $logmsg .= " to selfenroll with role: $env{'form.lti.selfenrollrole'}";
1.34 raeburn 191: } else {
192: $logmsg .= " (no role)";
193: }
194: $logmsg .= ' '.$ENV{'REMOTE_ADDR'};
1.1 albertel 195: &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
1.34 raeburn 196: $env{'user.home'},$logmsg);
1.1 albertel 197:
198: &Apache::loncommon::content_type($r,'text/html');
1.12 albertel 199:
1.41 raeburn 200: #expire the cookies
201: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
202: foreach my $name (keys(%cookies)) {
203: next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
204: my $c = new CGI::Cookie(-name => $name,
205: -value => '',
206: -expires => '-10y',);
207: $r->headers_out->add('Set-cookie' => $c);
1.36 raeburn 208: }
1.20 albertel 209: if ($r->header_only) {
210: $r->send_http_header;
211: return OK;
212: }
1.1 albertel 213: # -------------------------------------------------------- Menu script and info
214:
215: # ---------------------------------------------------------------- Get handover
216:
1.42 raeburn 217: my $newcookieid;
1.43 ! raeburn 218: my ($is_balancer,$posshost,$setcookie,$offloadto,$dom_balancers) =
1.42 raeburn 219: &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'});
220: if ($is_balancer && $setcookie && $env{'form.otherserver'}) {
221:
222: # Set a balancer cookie unless browser already sent LON-CAPA load balancer
223: # cookie which points at the target server
224: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
225:
226: unless (($found_server eq $env{'form.otherserver'}) &&
227: ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
228: my @hosts = &Apache::lonnet::current_machine_ids();
229: my $desthost = $env{'form.otherserver'};
230: unless (grep(/^\Q$desthost\E$/,@hosts)) {
231: my $balancedir=$r->dir_config('lonBalanceDir');
232: $newcookieid = &md5_hex(&md5_hex($now.{}.rand().$$));
233: my $cookie = $env{'user.domain'}.'_'.$env{'user.name'}.'_'.$newcookieid;
234: my $balcookie = "balanceID=$cookie; path=/; HttpOnly;";
235: if (open(my $fh,'>',"$balancedir/$cookie.id")) {
236: print $fh $env{'form.otherserver'};
237: close($fh);
238: }
239: $r->headers_out->add('Set-cookie' => $balcookie);
240: }
241: }
242: }
243:
1.43 ! raeburn 244: my %info=('ip' => $ENV{'REMOTE_ADDR'},
! 245: 'domain' => $env{'user.domain'},
! 246: 'username' => $env{'user.name'},
! 247: 'home' => $env{'user.home'},
! 248: 'role' => $env{'form.role'},
! 249: 'server' => $r->dir_config('lonHostID'),
! 250: 'balancer' => $is_balancer,
! 251: 'dom_balancers' => $dom_balancers,
! 252: 'offloadto' => '');
! 253: if (ref($offloadto) eq 'HASH') {
! 254: foreach my $key (keys(%{$offloadto})) {
! 255: if (ref($offloadto->{$key}) eq 'ARRAY') {
! 256: $info{'offloadto'} .= $key.'='.join(',',@{$offloadto->{$key}}).'&';
! 257: }
! 258: }
! 259: $info{'offloadto'} =~ s/\&$//;
! 260: } elsif (ref($offloadto) eq 'ARRAY') {
! 261: $info{'offloadto'} = join(',',@{$offloadto});
! 262: }
1.42 raeburn 263: if ($newcookieid) {
264: $info{'balcookie'} = $newcookieid;
265: }
1.22 raeburn 266: if ($env{'form.origurl'}) {
267: $info{'origurl'} = $env{'form.origurl'};
268: }
269: if ($env{'form.symb'}) {
270: $info{'symb'} = $env{'form.symb'};
271: }
1.8 albertel 272: if ($env{'request.sso.login'}) {
273: $info{'sso.login'} = $env{'request.sso.login'};
274: }
1.11 raeburn 275: if ($env{'request.sso.reloginserver'}) {
276: $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
277: }
1.38 raeburn 278: if ($env{'request.lti.login'}) {
279: $info{'lti.login'} = $env{'request.lti.login'};
280: }
1.40 raeburn 281: if ($env{'request.lti.uri'}) {
282: $info{'lti.uri'} = $env{'request.lti.uri'};
283: }
1.39 raeburn 284: if ($env{'request.lti.reqcrs'}) {
285: $info{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
286: }
287: if ($env{'request.lti.reqrole'}) {
288: $info{'lti.reqrole'} = $env{'request.lti.reqrole'};
289: }
290: if ($env{'request.lti.selfenrollrole'}) {
291: $info{'lti.selfenrollrole'} = $env{'request.lti.selfenrollrole'};
292: }
293: if ($env{'request.lti.sourcecrs'}) {
294: $info{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
295: }
1.38 raeburn 296: if ($env{'request.lti.passbackid'}) {
297: $info{'lti.passbackid'} = $env{'request.lti.passbackid'};
298: }
299: if ($env{'request.lti.passbackurl'}) {
300: $info{'lti.passbackurl'} = $env{'request.lti.passbackurl'};
301: }
302: if ($env{'request.lti.rosterid'}) {
303: $info{'lti.rosterid'} = $env{'request.lti.rosterid'};
304: }
305: if ($env{'request.lti.rosterurl'}) {
306: $info{'lti.rosterurl'} = $env{'request.lti.rosterurl'};
307: }
1.40 raeburn 308: if ($env{'request.lti.target'}) {
309: $info{'lti.target'} = $env{'request.lti.target'};
310: }
1.3 albertel 311: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.33 raeburn 312: my $url =$protocol.'://'.$switch_to.'/adm/login?'.
1.14 albertel 313: 'domain='.$env{'user.domain'}.
1.21 albertel 314: '&username='.$env{'user.name'}.
315: '&token='.$token;
1.1 albertel 316: # --------------------------------------------------------------- Screen Output
1.24 droeschl 317: return &do_redirect($r, $url, 0);
1.1 albertel 318: }
319:
320: 1;
321: __END__
322:
323:
324:
325:
326:
327:
328:
329:
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