File:
[LON-CAPA] /
loncom /
auth /
switchserver.pm
Revision
1.54:
download - view:
text,
annotated -
select for diffs
Mon May 3 15:27:43 2021 UTC (3 years ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
- Bug 6914
- Check whether WAF proxy alias should be used when using switchserver.
- Requests for /adm/dns/hosts and /adm/dns/domain from other nodes in the
network do not require redirecting to an alias (if in use).
1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
4: # $Id: switchserver.pm,v 1.54 2021/05/03 15:27:43 raeburn Exp $
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 Digest::MD5 qw(md5_hex);
35: use CGI::Cookie();
36: use Apache::lonlocal;
37: use LONCAPA qw(:DEFAULT :match);
38:
39: sub init_env {
40: my ($r) = @_;
41:
42: if (-e $env{'user.environment'}) {
43: return $env{'user.environment'};
44: }
45: my $requrl=$r->uri;
46: my $handle= &Apache::lonnet::check_for_valid_session($r);
47: if ($handle ne '') {
48: return undef;
49: }
50: my $lonidsdir=$r->dir_config('lonIDsDir');
51: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
52:
53: return $r->dir_config('lonIDsDir')."/$handle.id";
54: }
55:
56: sub do_redirect {
57: my ($r,$url,$only_body,$extra_text) = @_;
58: $r->send_http_header;
59: my $delay = 0.5;
60: if ($only_body) {
61: $delay = 0;
62: }
63: my $start_page =
64: &Apache::loncommon::start_page('Switching Server ...',undef,
65: {'redirect' => [$delay,$url],
66: 'only_body' => $only_body,});
67: my $end_page = &Apache::loncommon::end_page();
68: $r->print($start_page.$extra_text.$end_page);
69: unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
70: $r->register_cleanup(\&flush_course_logs);
71: }
72: return OK;
73: }
74:
75: sub balancer_cookieid {
76: my ($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 $newcookieid;
91: }
92:
93: sub flush_course_logs {
94: &Apache::lonnet::flushcourselogs();
95: return OK;
96: }
97:
98: sub handler {
99: my ($r) = @_;
100:
101: my $handle=&init_env($r);
102: if (!defined($handle)) { return FORBIDDEN; }
103:
104: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
105: ['otherserver','role','origurl','symb']);
106:
107: my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
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: }
116: $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
117: }
118:
119: if (!defined($switch_to)) { return FORBIDDEN; }
120:
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: }
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: }
130: }
131:
132: if ($env{'user.name'} eq 'public'
133: && $env{'user.domain'} eq 'public') {
134: my $url = $protocol.'://'.$switch_to.$r->uri;
135: unlink($handle);
136: #expire the cookie
137: my $c = new CGI::Cookie(-name => 'lonPubID',
138: -value => '',
139: -expires => '-10y',);
140: $r->header_out('Set-cookie' => $c);
141: return &do_redirect($r,$url,1)
142: }
143:
144: my $skip_canhost_check = '';
145: my $now = time;
146: if ($env{'form.role'}) {
147: if (!exists($env{'user.role.'.$env{'form.role'}})) {
148: delete($env{'form.role'});
149: } else {
150: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
151: if (($start && $start > $now) || ($end && $end < $now)) {
152: delete($env{'form.role'});
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: $skip_canhost_check = 1;
156: }
157: } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
158: my ($audom,$auname) = ($1,$2);
159: if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
160: if ((&Apache::lonnet::will_trust('othcoau',$env{'user.domain'},$audom)) &&
161: (&Apache::lonnet::will_trust('coaurem',$audom,$env{'user.domain'}))) {
162: $skip_canhost_check = 1;
163: }
164: }
165: }
166: }
167: }
168:
169: unless ($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);
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: }
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; }
192: }
193:
194: #remove session env, and log event
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: }
203: }
204: }
205: my %temp=('switchserver' => $now.':'.$env{'form.otherserver'},
206: $env{'form.role'});
207: &Apache::lonnet::put('email_status',\%temp);
208: my $logmsg = "Switch Server to $env{'form.otherserver'}";
209: if ($env{'form.role'}) {
210: $logmsg .= " with role: $env{'form.role'}";
211: } elsif (($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'}";
215: } else {
216: $logmsg .= " (no role)";
217: }
218: my $ip = &Apache::lonnet::get_requestor_ip();
219: $logmsg .= ' '.$ip;
220: &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
221: $env{'user.home'},$logmsg);
222:
223: &Apache::loncommon::content_type($r,'text/html');
224:
225: #expire the cookies
226: my %cookies=CGI::Cookie->parse($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' => $c);
233: }
234: if ($r->header_only) {
235: $r->send_http_header;
236: return OK;
237: }
238: # -------------------------------------------------------- Menu script and info
239:
240: # ---------------------------------------------------------------- Get handover
241:
242: my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie,$offloadto,$dom_balancers);
243: my $only_body = 0;
244: ($is_balancer,undef,$setcookie,$offloadto,$dom_balancers) =
245: &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver');
246: if ($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:
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 {
256: $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'},
257: $env{'user.name'},$env{'user.domain'});
258: }
259: }
260: if ((!$is_balancer) && ($env{'request.balancercookie'})) {
261: $otherbalcookie = $env{'request.balancercookie'};
262: }
263:
264: my %info=('ip' => $ip,
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: }
283: if ($newcookieid) {
284: $info{'balcookie'} = $newcookieid;
285: } elsif ($otherbalcookie) {
286: $info{'otherbalcookie'} = $otherbalcookie;
287: }
288: if ($env{'form.origurl'}) {
289: $info{'origurl'} = $env{'form.origurl'};
290: }
291: if ($env{'form.symb'}) {
292: $info{'symb'} = $env{'form.symb'};
293: }
294: if ($env{'request.sso.login'}) {
295: $info{'sso.login'} = $env{'request.sso.login'};
296: }
297: if ($env{'request.sso.reloginserver'}) {
298: $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
299: }
300: if ($env{'request.linkprot'}) {
301: $info{'linkprot'} = $env{'request.linkprot'};
302: }
303: if ($env{'request.deeplink.login'}) {
304: $info{'deeplink.login'} = $env{'request.deeplink.login'};
305: if ($env{'request.linkkey'}) {
306: $info{'linkkey'} = $env{'request.linkkey'};
307: }
308: }
309: if ($env{'request.lti.login'}) {
310: $info{'lti.login'} = $env{'request.lti.login'};
311: }
312: if ($env{'request.lti.uri'}) {
313: $info{'lti.uri'} = $env{'request.lti.uri'};
314: }
315: if ($env{'request.lti.reqcrs'}) {
316: $info{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
317: }
318: if ($env{'request.lti.reqrole'}) {
319: $info{'lti.reqrole'} = $env{'request.lti.reqrole'};
320: }
321: if ($env{'request.lti.selfenrollrole'}) {
322: $info{'lti.selfenrollrole'} = $env{'request.lti.selfenrollrole'};
323: }
324: if ($env{'request.lti.sourcecrs'}) {
325: $info{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
326: }
327: if ($env{'request.lti.passbackid'}) {
328: $info{'lti.passbackid'} = $env{'request.lti.passbackid'};
329: }
330: if ($env{'request.lti.passbackurl'}) {
331: $info{'lti.passbackurl'} = $env{'request.lti.passbackurl'};
332: }
333: if ($env{'request.lti.rosterid'}) {
334: $info{'lti.rosterid'} = $env{'request.lti.rosterid'};
335: }
336: if ($env{'request.lti.rosterurl'}) {
337: $info{'lti.rosterurl'} = $env{'request.lti.rosterurl'};
338: }
339: if ($env{'request.lti.target'}) {
340: $info{'lti.target'} = $env{'request.lti.target'};
341: }
342: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
343: my $url =$protocol.'://'.$switch_to.'/adm/login?'.
344: 'domain='.$env{'user.domain'}.
345: '&username='.$env{'user.name'}.
346: '&token='.$token;
347: # --------------------------------------------------------------- Screen Output
348: return &do_redirect($r, $url, $only_body);
349: }
350:
351: 1;
352: __END__
353:
354:
355:
356:
357:
358:
359:
360:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to switchserver.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth