Annotation of loncom/auth/switchserver.pm, revision 1.58
1.1 albertel 1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
1.58 ! raeburn 4: # $Id: switchserver.pm,v 1.57 2021/08/10 15:28:13 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;
1.55 raeburn 32: use Apache::Constants qw(:common :remotehost);
1.1 albertel 33: use Apache::lonnet;
1.42 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);
1.42 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;
1.49 raeburn 59: my $delay = 0.5;
1.56 raeburn 60: if ($only_body && !$extra_text) {
1.49 raeburn 61: $delay = 0;
62: }
1.14 albertel 63: my $start_page =
1.16 raeburn 64: &Apache::loncommon::start_page('Switching Server ...',undef,
1.49 raeburn 65: {'redirect' => [$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: $r->register_cleanup(\&flush_course_logs);
71: }
1.14 albertel 72: return OK;
1.30 raeburn 73: }
1.14 albertel 74:
1.45 raeburn 75: sub balancer_cookieid {
76: my ($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: $env{'form.otherserver'} =
1.55 raeburn 114: &Apache::lonnet::spareserver($r,30000,undef,1);
1.17 albertel 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: }
1.54 raeburn 126: unless ($env{'form.otherserver'} eq $r->dir_config('lonHostID')) {
127: my $alias = &Apache::lonnet::use_proxy_alias($r,$env{'form.otherserver'});
128: $switch_to = $alias if ($alias ne '');
129: }
1.42 raeburn 130: }
1.33 raeburn 131:
1.14 albertel 132: if ($env{'user.name'} eq 'public'
133: && $env{'user.domain'} eq 'public') {
1.33 raeburn 134: my $url = $protocol.'://'.$switch_to.$r->uri;
1.36 raeburn 135: unlink($handle);
136: #expire the cookie
137: my $c = new CGI::Cookie(-name => 'lonPubID',
138: -value => '',
139: -expires => '-10y',);
140: $r->header_out('Set-cookie' => $c);
1.14 albertel 141: return &do_redirect($r,$url,1)
142: }
143:
1.28 raeburn 144: my $skip_canhost_check = '';
1.45 raeburn 145: my $now = time;
1.28 raeburn 146: if ($env{'form.role'}) {
147: if (!exists($env{'user.role.'.$env{'form.role'}})) {
1.35 raeburn 148: delete($env{'form.role'});
1.28 raeburn 149: } else {
150: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
151: if (($start && $start > $now) || ($end && $end < $now)) {
1.35 raeburn 152: delete($env{'form.role'});
1.28 raeburn 153: } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
154: if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
155: $skip_canhost_check = 1;
156: }
1.31 raeburn 157: } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
1.37 raeburn 158: my ($audom,$auname) = ($1,$2);
159: if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
1.46 raeburn 160: if ((&Apache::lonnet::will_trust('othcoau',$env{'user.domain'},$audom)) &&
161: (&Apache::lonnet::will_trust('coaurem',$audom,$env{'user.domain'}))) {
1.37 raeburn 162: $skip_canhost_check = 1;
163: }
1.28 raeburn 164: }
165: }
166: }
167: }
168:
169: unless ($skip_canhost_check) {
170: my $canhost = 1;
171: my $uprimary_id = &Apache::lonnet::domain($env{'user.domain'},'primary');
172: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
1.29 raeburn 173: my @intdoms;
174: my $internet_names = &Apache::lonnet::get_internet_names($env{'form.otherserver'});
175: if (ref($internet_names) eq 'ARRAY') {
176: @intdoms = @{$internet_names};
177: }
1.28 raeburn 178: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
179: my $serverhomeID = &Apache::lonnet::get_server_homeID($switch_to);
180: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
181: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
182: my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
183: my $remoterev = &Apache::lonnet::get_server_loncaparev($env{'user.domain'},$env{'form.otherserver'});
184: $canhost =
185: &Apache::lonnet::can_host_session($env{'user.domain'},
186: $env{'form.otherserver'},
187: $remoterev,
188: $udomdefaults{'remotesessions'},
189: $defdomdefaults{'hostedsessions'});
190: }
191: unless ($canhost) { return FORBIDDEN; }
1.26 raeburn 192: }
193:
1.1 albertel 194: #remove session env, and log event
1.41 raeburn 195: if (unlink($handle)) {
196: if ($env{'user.linkedenv'} ne '') {
197: my $lonidsdir=$r->dir_config('lonIDsDir');
198: if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
199: (-l "$lonidsdir/$env{'user.linkedenv'}.id") &&
200: (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq $handle)) {
201: unlink("$lonidsdir/$env{'user.linkedenv'}.id");
202: }
1.36 raeburn 203: }
204: }
1.42 raeburn 205: my %temp=('switchserver' => $now.':'.$env{'form.otherserver'},
1.1 albertel 206: $env{'form.role'});
207: &Apache::lonnet::put('email_status',\%temp);
1.34 raeburn 208: my $logmsg = "Switch Server to $env{'form.otherserver'}";
209: if ($env{'form.role'}) {
210: $logmsg .= " with role: $env{'form.role'}";
1.39 raeburn 211: } elsif (($env{'form.lti.reqcrs'}) && ($env{'form.lti.reqrole'} eq 'cc')) {
212: $logmsg .= " to create new LTI course";
213: } elsif ($env{'form.lti.selfenrollrole'}) {
214: $logmsg .= " to selfenroll with role: $env{'form.lti.selfenrollrole'}";
1.34 raeburn 215: } else {
216: $logmsg .= " (no role)";
217: }
1.55 raeburn 218: my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
1.52 raeburn 219: $logmsg .= ' '.$ip;
1.1 albertel 220: &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
1.34 raeburn 221: $env{'user.home'},$logmsg);
1.1 albertel 222:
223: &Apache::loncommon::content_type($r,'text/html');
1.12 albertel 224:
1.41 raeburn 225: #expire the cookies
226: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
227: foreach my $name (keys(%cookies)) {
228: next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
229: my $c = new CGI::Cookie(-name => $name,
230: -value => '',
231: -expires => '-10y',);
232: $r->headers_out->add('Set-cookie' => $c);
1.36 raeburn 233: }
1.20 albertel 234: if ($r->header_only) {
235: $r->send_http_header;
236: return OK;
237: }
1.1 albertel 238: # -------------------------------------------------------- Menu script and info
1.51 raeburn 239:
1.1 albertel 240: # ---------------------------------------------------------------- Get handover
241:
1.51 raeburn 242: my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie,$offloadto,$dom_balancers);
1.49 raeburn 243: my $only_body = 0;
1.50 raeburn 244: ($is_balancer,undef,$setcookie,$offloadto,$dom_balancers) =
245: &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver');
1.42 raeburn 246: if ($is_balancer && $setcookie && $env{'form.otherserver'}) {
247:
248: # Set a balancer cookie unless browser already sent LON-CAPA load balancer
249: # cookie which points at the target server
250: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
251:
1.49 raeburn 252: if (($found_server eq $env{'form.otherserver'}) &&
253: ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
254: $only_body = 1;
255: } else {
1.45 raeburn 256: $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'},
257: $env{'user.name'},$env{'user.domain'});
1.42 raeburn 258: }
259: }
1.51 raeburn 260: if ((!$is_balancer) && ($env{'request.balancercookie'})) {
261: $otherbalcookie = $env{'request.balancercookie'};
262: }
1.42 raeburn 263:
1.53 raeburn 264: my %info=('ip' => $ip,
1.43 raeburn 265: 'domain' => $env{'user.domain'},
266: 'username' => $env{'user.name'},
267: 'home' => $env{'user.home'},
268: 'role' => $env{'form.role'},
269: 'server' => $r->dir_config('lonHostID'),
270: 'balancer' => $is_balancer,
271: 'dom_balancers' => $dom_balancers,
272: 'offloadto' => '');
273: if (ref($offloadto) eq 'HASH') {
274: foreach my $key (keys(%{$offloadto})) {
275: if (ref($offloadto->{$key}) eq 'ARRAY') {
276: $info{'offloadto'} .= $key.'='.join(',',@{$offloadto->{$key}}).'&';
277: }
278: }
279: $info{'offloadto'} =~ s/\&$//;
280: } elsif (ref($offloadto) eq 'ARRAY') {
281: $info{'offloadto'} = join(',',@{$offloadto});
282: }
1.42 raeburn 283: if ($newcookieid) {
284: $info{'balcookie'} = $newcookieid;
1.51 raeburn 285: } elsif ($otherbalcookie) {
286: $info{'otherbalcookie'} = $otherbalcookie;
1.42 raeburn 287: }
1.22 raeburn 288: if ($env{'form.origurl'}) {
289: $info{'origurl'} = $env{'form.origurl'};
290: }
291: if ($env{'form.symb'}) {
292: $info{'symb'} = $env{'form.symb'};
293: }
1.56 raeburn 294: my $ssologoutscript = '';
1.8 albertel 295: if ($env{'request.sso.login'}) {
296: $info{'sso.login'} = $env{'request.sso.login'};
1.56 raeburn 297: if (defined($r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
298: if (open(my $fh,'<',$r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
299: $ssologoutscript .= join('',<$fh>);
300: close($fh);
301: }
302: }
1.58 ! raeburn 303: if (defined($r->dir_config('lonSSOUserLogoutScriptFile'))) {
1.56 raeburn 304: if (open(my $fh,'<',$r->dir_config('lonSSOUserLogoutScriptFile'))) {
305: $ssologoutscript .= join('',<$fh>);
306: close($fh);
307: }
308: }
1.8 albertel 309: }
1.11 raeburn 310: if ($env{'request.sso.reloginserver'}) {
311: $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
312: }
1.47 raeburn 313: if ($env{'request.linkprot'}) {
314: $info{'linkprot'} = $env{'request.linkprot'};
1.57 raeburn 315: } elsif ($env{'request.linkkey'}) {
316: $info{'linkkey'} = $env{'request.linkkey'};
1.47 raeburn 317: }
1.48 raeburn 318: if ($env{'request.deeplink.login'}) {
319: $info{'deeplink.login'} = $env{'request.deeplink.login'};
320: }
1.38 raeburn 321: if ($env{'request.lti.login'}) {
322: $info{'lti.login'} = $env{'request.lti.login'};
323: }
1.40 raeburn 324: if ($env{'request.lti.uri'}) {
325: $info{'lti.uri'} = $env{'request.lti.uri'};
326: }
1.39 raeburn 327: if ($env{'request.lti.reqcrs'}) {
328: $info{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
329: }
330: if ($env{'request.lti.reqrole'}) {
331: $info{'lti.reqrole'} = $env{'request.lti.reqrole'};
332: }
333: if ($env{'request.lti.selfenrollrole'}) {
334: $info{'lti.selfenrollrole'} = $env{'request.lti.selfenrollrole'};
335: }
336: if ($env{'request.lti.sourcecrs'}) {
337: $info{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
338: }
1.38 raeburn 339: if ($env{'request.lti.passbackid'}) {
340: $info{'lti.passbackid'} = $env{'request.lti.passbackid'};
341: }
342: if ($env{'request.lti.passbackurl'}) {
343: $info{'lti.passbackurl'} = $env{'request.lti.passbackurl'};
344: }
345: if ($env{'request.lti.rosterid'}) {
346: $info{'lti.rosterid'} = $env{'request.lti.rosterid'};
347: }
348: if ($env{'request.lti.rosterurl'}) {
349: $info{'lti.rosterurl'} = $env{'request.lti.rosterurl'};
350: }
1.40 raeburn 351: if ($env{'request.lti.target'}) {
352: $info{'lti.target'} = $env{'request.lti.target'};
353: }
1.3 albertel 354: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.33 raeburn 355: my $url =$protocol.'://'.$switch_to.'/adm/login?'.
1.14 albertel 356: 'domain='.$env{'user.domain'}.
1.21 albertel 357: '&username='.$env{'user.name'}.
358: '&token='.$token;
1.1 albertel 359: # --------------------------------------------------------------- Screen Output
1.56 raeburn 360: return &do_redirect($r, $url, $only_body, $ssologoutscript);
1.1 albertel 361: }
362:
363: 1;
364: __END__
365:
366:
367:
368:
369:
370:
371:
372:
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