Annotation of loncom/auth/switchserver.pm, revision 1.35.2.8
1.1 albertel 1: # The LearningOnline Network
2: # Switch Servers Handler
3: #
1.35.2.8! raeburn 4: # $Id: switchserver.pm,v 1.35.2.7 2024/07/02 19:42:06 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;
1.35.2.6 raeburn 32: use Apache::Constants qw(:common :remotehost);
1.1 albertel 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 $delay = 0.5;
1.35.2.6 raeburn 60: if ($only_body && !$extra_text) {
1.35.2.1 raeburn 61: $delay = 0;
62: }
1.14 albertel 63: my $start_page =
1.16 raeburn 64: &Apache::loncommon::start_page('Switching Server ...',undef,
1.35.2.7 raeburn 65: {'redirect' => [$delay,$url,'',1],
1.35.2.8! raeburn 66: 'only_body' => $only_body,
! 67: 'switchserver' => 1,
! 68: 'links_disabled' => 1,
! 69: 'no_inline_link' => 1,});
1.14 albertel 70: my $end_page = &Apache::loncommon::end_page();
71: $r->print($start_page.$extra_text.$end_page);
1.30 raeburn 72: unless ($env{'user.name'} eq 'public' && ($env{'user.domain'} eq 'public')) {
73: $r->register_cleanup(\&flush_course_logs);
74: }
1.14 albertel 75: return OK;
1.30 raeburn 76: }
1.14 albertel 77:
1.35.2.1 raeburn 78: sub balancer_cookieid {
79: my ($r,$desthost,$uname,$udom) = @_;
80: my @hosts = &Apache::lonnet::current_machine_ids();
81: my $newcookieid;
82: unless (grep(/^\Q$desthost\E$/,@hosts)) {
83: my $balancedir=$r->dir_config('lonBalanceDir');
84: $newcookieid = &md5_hex(&md5_hex(time.{}.rand().$$));
85: my $cookie = $udom.'_'.$uname.'_'.$newcookieid;
86: my $balcookie = "balanceID=$cookie; path=/; HttpOnly;";
87: if (open(my $fh,'>',"$balancedir/$cookie.id")) {
88: print $fh $desthost;
89: close($fh);
90: $r->headers_out->add('Set-cookie' => $balcookie);
91: }
92: }
93: return $newcookieid;
94: }
95:
1.30 raeburn 96: sub flush_course_logs {
97: &Apache::lonnet::flushcourselogs();
98: return OK;
1.14 albertel 99: }
100:
1.1 albertel 101: sub handler {
1.5 albertel 102: my ($r) = @_;
1.1 albertel 103:
104: my $handle=&init_env($r);
105: if (!defined($handle)) { return FORBIDDEN; }
106:
107: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.35.2.7 raeburn 108: ['otherserver','role','origurl','symb','edit']);
1.5 albertel 109:
1.13 albertel 110: my $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.17 albertel 111: if (! $env{'form.otherserver'}) {
112: $env{'form.otherserver'} =
113: &Apache::lonnet::find_existing_session($env{'user.domain'},
114: $env{'user.name'});
115: if (! $env{'form.otherserver'}) {
116: $env{'form.otherserver'} =
1.35.2.6 raeburn 117: &Apache::lonnet::spareserver($r,30000,undef,1);
1.17 albertel 118: }
1.13 albertel 119: $switch_to=&Apache::lonnet::hostname($env{'form.otherserver'});
1.4 albertel 120: }
1.5 albertel 121:
1.1 albertel 122: if (!defined($switch_to)) { return FORBIDDEN; }
1.4 albertel 123:
1.33 raeburn 124: my $protocol = 'http';
125: if ($env{'form.otherserver'}) {
126: if ($Apache::lonnet::protocol{$env{'form.otherserver'}} eq 'https') {
127: $protocol = $Apache::lonnet::protocol{$env{'form.otherserver'}};
128: }
1.35.2.6 raeburn 129: unless ($env{'form.otherserver'} eq $r->dir_config('lonHostID')) {
130: my $alias = &Apache::lonnet::use_proxy_alias($r,$env{'form.otherserver'});
131: $switch_to = $alias if ($alias ne '');
132: }
1.35.2.1 raeburn 133: }
1.33 raeburn 134:
1.14 albertel 135: if ($env{'user.name'} eq 'public'
136: && $env{'user.domain'} eq 'public') {
1.33 raeburn 137: my $url = $protocol.'://'.$switch_to.$r->uri;
1.35.2.2 raeburn 138: unlink($handle);
139: #expire the cookie
140: my $c = new CGI::Cookie(-name => 'lonPubID',
141: -value => '',
142: -expires => '-10y',);
143: $r->header_out('Set-cookie' => $c);
1.14 albertel 144: return &do_redirect($r,$url,1)
145: }
146:
1.28 raeburn 147: my $skip_canhost_check = '';
1.35.2.1 raeburn 148: my $now = time;
1.28 raeburn 149: if ($env{'form.role'}) {
150: if (!exists($env{'user.role.'.$env{'form.role'}})) {
1.35 raeburn 151: delete($env{'form.role'});
1.28 raeburn 152: } else {
153: my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.role'}});
154: if (($start && $start > $now) || ($end && $end < $now)) {
1.35 raeburn 155: delete($env{'form.role'});
1.28 raeburn 156: } elsif ($env{'form.role'} eq 'au./'.$env{'user.domain'}.'/') {
157: if (&Apache::lonnet::homeserver($env{'user.name'},$env{'user.domain'}) eq $env{'form.otherserver'}) {
158: $skip_canhost_check = 1;
159: }
1.31 raeburn 160: } elsif ($env{'form.role'} =~ m{^[ac]a\./($match_domain)/($match_username)$}) {
1.28 raeburn 161: if (&Apache::lonnet::homeserver($2,$1) eq $env{'form.otherserver'}) {
162: $skip_canhost_check = 1;
163: }
164: }
165: }
166: }
167:
168: unless ($skip_canhost_check) {
1.35.2.7 raeburn 169: my $canhost = &Apache::lonnet::can_switchserver($env{'user.domain'},$env{'form.otherserver'});
170: unless ($canhost) {
171: if (($env{'request.course.id'}) && ($env{'form.symb'} ne '') &&
172: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
173: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
174: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
175: if (($cdom ne '') && ($cnum ne '') && ($env{'form.role'} =~ m{^([^.]+)\Q./$cdom/$cnum\E$})) {
176: my $symb = &Apache::lonnet::symbclean($env{'form.symb'});
177: my ($map,$idx,$url) = &Apache::lonnet::decode_symb($symb);
178: if (&Apache::lonnet::symbverify($symb,$url)) {
179: my $fileloc = &Apache::lonnet::declutter(&Apache::lonnet::filelocation("",$url));
180: my $resurl = &Apache::lonnet::clutter($url);
181: if ($resurl =~ m{^/res/($match_domain)/($match_username)/}) {
182: my ($audom,$auname) = ($1,$2);
183: if (&Apache::lonnet::homeserver($auname,$audom) eq $env{'form.otherserver'}) {
184: my @possroles = ("user.role.au./$audom/","user.role.ca./$audom/$auname","user.role.aa./$audom/$auname");
185: my $hasrole;
186: foreach my $rolekey (@possroles) {
187: if (exists($env{$rolekey})) {
188: my ($start,$end) = split(/\./,$env{$rolekey});
189: unless (($start && $start > $now) || ($end && $end < $now)) {
190: $hasrole = $rolekey;
191: }
192: if ($hasrole) {
193: $hasrole =~ s/^\Quser.role.\E//;
194: last;
195: }
196: }
197: }
198: if ($hasrole) {
199: $env{'form.role'} = $hasrole;
200: $env{'form.origurl'} = &Apache::lonnet::deversion($resurl);
201: $env{'form.origurl'} =~ s{^/res/}{/priv/};
202: delete($env{'form.symb'});
203: $canhost = 1;
204: if ($env{'form.edit'}) {
205: my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
206: my %info=('ip' => $ip,
207: 'domain' => $env{'user.domain'},
208: 'username' => $env{'user.name'},
209: 'home' => $env{'user.home'},
210: 'role' => $env{'form.role'},
211: 'server' => $r->dir_config('lonHostID'),
212: 'origurl' => $env{'form.origurl'});
213: &Apache::loncommon::content_type($r,'text/html');
214: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
215: my $url = $protocol.'://'.$switch_to.'/adm/login?'.
216: 'domain='.$env{'user.domain'}.
217: '&username='.$env{'user.name'}.
218: '&token='.$token;
219: return &do_redirect($r,$url,0);
220: }
221: }
222: }
223: }
224: }
225: }
226: }
1.28 raeburn 227: }
228: unless ($canhost) { return FORBIDDEN; }
1.26 raeburn 229: }
230:
1.1 albertel 231: #remove session env, and log event
1.35.2.2 raeburn 232: if (unlink($handle)) {
233: if ($env{'user.linkedenv'} ne '') {
234: my $lonidsdir=$r->dir_config('lonIDsDir');
235: if (($env{'user.linkedenv'} =~ /^[a-f0-9]+_linked$/) &&
236: (-l "$lonidsdir/$env{'user.linkedenv'}.id") &&
237: (readlink("$lonidsdir/$env{'user.linkedenv'}.id") eq $handle)) {
238: unlink("$lonidsdir/$env{'user.linkedenv'}.id");
239: }
240: }
241: }
1.35.2.1 raeburn 242: my %temp=('switchserver' => $now.':'.$env{'form.otherserver'},
1.1 albertel 243: $env{'form.role'});
244: &Apache::lonnet::put('email_status',\%temp);
1.34 raeburn 245: my $logmsg = "Switch Server to $env{'form.otherserver'}";
246: if ($env{'form.role'}) {
247: $logmsg .= " with role: $env{'form.role'}";
248: } else {
249: $logmsg .= " (no role)";
250: }
1.35.2.6 raeburn 251: my $ip = &Apache::lonnet::get_requestor_ip($r,REMOTE_NOLOOKUP);
1.35.2.5 raeburn 252: $logmsg .= ' '.$ip;
1.1 albertel 253: &Apache::lonnet::log($env{'user.domain'},$env{'user.name'},
1.34 raeburn 254: $env{'user.home'},$logmsg);
1.1 albertel 255:
256: &Apache::loncommon::content_type($r,'text/html');
1.12 albertel 257:
1.35.2.2 raeburn 258: #expire the cookies
259: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
260: foreach my $name (keys(%cookies)) {
261: next unless ($name =~ /^lon(|S|Link|Pub)ID$/);
262: my $c = new CGI::Cookie(-name => $name,
263: -value => '',
264: -expires => '-10y',);
265: $r->headers_out->add('Set-cookie' => $c);
266: }
1.20 albertel 267: if ($r->header_only) {
268: $r->send_http_header;
269: return OK;
270: }
1.1 albertel 271: # -------------------------------------------------------- Menu script and info
1.35.2.3 raeburn 272:
1.1 albertel 273: # ---------------------------------------------------------------- Get handover
274:
1.35.2.4 raeburn 275: my ($is_balancer,$setcookie,$newcookieid,$otherbalcookie);
1.35.2.1 raeburn 276: my $only_body = 0;
1.35.2.3 raeburn 277: ($is_balancer,undef,$setcookie) =
278: &Apache::lonnet::check_loadbalancing($env{'user.name'},$env{'user.domain'},'switchserver');
1.35.2.1 raeburn 279: if ($is_balancer && $setcookie && $env{'form.otherserver'}) {
1.35.2.3 raeburn 280:
1.35.2.1 raeburn 281: # Set a balancer cookie unless browser already sent LON-CAPA load balancer
282: # cookie which points at the target server
283: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r,1);
284:
285: if (($found_server eq $env{'form.otherserver'}) &&
286: ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
287: $only_body = 1;
288: } else {
289: $newcookieid = &balancer_cookieid($r,$env{'form.otherserver'},
290: $env{'user.name'},$env{'user.domain'});
291: }
292: }
1.35.2.3 raeburn 293: if ((!$is_balancer) && ($env{'request.balancercookie'})) {
294: $otherbalcookie = $env{'request.balancercookie'};
295: }
1.35.2.1 raeburn 296:
1.35.2.5 raeburn 297: my %info=('ip' => $ip,
1.3 albertel 298: 'domain' => $env{'user.domain'},
299: 'username' => $env{'user.name'},
300: 'role' => $env{'form.role'},
1.32 raeburn 301: 'server' => $r->dir_config('lonHostID'),
302: 'balancer' => $is_balancer);
1.35.2.1 raeburn 303: if ($newcookieid) {
304: $info{'balcookie'} = $newcookieid;
1.35.2.3 raeburn 305: } elsif ($otherbalcookie) {
306: $info{'otherbalcookie'} = $otherbalcookie;
1.35.2.1 raeburn 307: }
1.22 raeburn 308: if ($env{'form.origurl'}) {
309: $info{'origurl'} = $env{'form.origurl'};
310: }
311: if ($env{'form.symb'}) {
312: $info{'symb'} = $env{'form.symb'};
313: }
1.35.2.6 raeburn 314: my $ssologoutscript = '';
1.8 albertel 315: if ($env{'request.sso.login'}) {
316: $info{'sso.login'} = $env{'request.sso.login'};
1.35.2.6 raeburn 317: if (defined($r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
318: if (open(my $fh,'<',$r->dir_config("lonSSOUserLogoutScriptFile_$info{domain}"))) {
319: $ssologoutscript .= join('',<$fh>);
320: close($fh);
321: }
322: }
323: if (defined($r->dir_config('lonSSOUserLogoutScriptFile'))) {
324: if (open(my $fh,'<',$r->dir_config('lonSSOUserLogoutScriptFile'))) {
325: $ssologoutscript .= join('',<$fh>);
326: close($fh);
327: }
328: }
1.8 albertel 329: }
1.11 raeburn 330: if ($env{'request.sso.reloginserver'}) {
331: $info{'sso.reloginserver'} = $env{'request.sso.reloginserver'};
332: }
1.3 albertel 333: my $token = &Apache::lonnet::tmpput(\%info,$env{'form.otherserver'});
1.33 raeburn 334: my $url =$protocol.'://'.$switch_to.'/adm/login?'.
1.14 albertel 335: 'domain='.$env{'user.domain'}.
1.21 albertel 336: '&username='.$env{'user.name'}.
337: '&token='.$token;
1.1 albertel 338: # --------------------------------------------------------------- Screen Output
1.35.2.6 raeburn 339: return &do_redirect($r, $url, $only_body, $ssologoutscript);
1.1 albertel 340: }
341:
342: 1;
343: __END__
344:
345:
346:
347:
348:
349:
350:
351:
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