Annotation of loncom/auth/lonauth.pm, revision 1.153
1.136 kruse 1: # The LearningOnline Network
2: # User Authentication Module
3: #
1.153 ! raeburn 4: # $Id: lonauth.pm,v 1.152 2018/05/08 15:44:11 raeburn Exp $
1.136 kruse 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::lonauth;
30:
31: use strict;
1.140 raeburn 32: use LONCAPA qw(:DEFAULT :match);
1.136 kruse 33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
35: use Apache::loncommon();
36: use Apache::lonnet;
37: use Apache::lonmenu();
38: use Apache::createaccount;
1.149 raeburn 39: use Apache::ltiauth;
1.136 kruse 40: use Fcntl qw(:flock);
41: use Apache::lonlocal;
42: use Apache::File();
43: use HTML::Entities;
1.143 raeburn 44: use Digest::MD5;
1.136 kruse 45:
46: # ------------------------------------------------------------ Successful login
47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
1.149 raeburn 49: $form,$skipcritical) = @_;
1.136 kruse 50:
51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
55: {'extra_env' => $extra_env,});
56:
57: my $public=($username eq 'public' && $domain eq 'public');
58:
59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
60:
61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
65:
66: # ------------------------------------------------- Check for critical messages
67:
1.149 raeburn 68: unless ($skipcritical) {
69: my @what=&Apache::lonnet::dump('critical',$domain,$username);
70: if ($what[0]) {
71: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
72: $lowerurl='/adm/email?critical=display';
73: }
1.136 kruse 74: }
75: }
76:
1.143 raeburn 77: # ----------------------------------------------------------- Get cookies ready
78: my ($securecookie,$defaultcookie);
79: if ($ENV{'SERVER_PORT'} == 443) {
80: $securecookie="lonID=$cookie; path=/; HttpOnly; secure";
81: my $lonidsdir=$r->dir_config('lonIDsDir');
82: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) {
83: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked';
84: if (-e "$lonidsdir/$linkname.id") {
85: unlink("$lonidsdir/$linkname.id");
86: }
87: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id",
88: "$lonidsdir/$linkname.id"); 1 };
89: if ($made_symlink) {
90: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;";
91: &Apache::lonnet::appenv({'user.linkedenv' => "$lonidsdir/$linkname.id"});
92: }
93: }
94: } else {
95: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;";
96: }
1.136 kruse 97: # -------------------------------------------------------- Menu script and info
98: my $destination = $lowerurl;
1.149 raeburn 99: if ($env{'request.lti.login'}) {
100: if (($env{'request.lti.reqcrs'}) && ($env{'request.lti.reqrole'} eq 'cc')) {
101: &Apache::loncommon::content_type($r,'text/html');
102: if ($securecookie) {
103: $r->headers_out->add('Set-cookie' => $securecookie);
104: }
105: if ($defaultcookie) {
106: $r->headers_out->add('Set-cookie' => $defaultcookie);
107: }
108: $r->send_http_header;
1.152 raeburn 109: if (ref($form) eq 'HASH') {
110: $form->{'lti.reqcrs'} = $env{'request.lti.reqcrs'};
111: $form->{'lti.reqrole'} = $env{'request.lti.reqrole'};
112: $form->{'lti.sourcecrs'} = $env{'request.lti.sourcecrs'};
113: }
1.149 raeburn 114: &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain);
115: return;
116: }
117: if ($env{'request.lti.selfenrollrole'}) {
118: if (&Apache::ltiauth::lti_enroll($username,$domain,
119: $env{'request.lti.selfenrollrole'}) eq 'ok') {
120: $form->{'role'} = $env{'request.lti.selfenrollrole'};
121: &Apache::lonnet::delenv('request.lti.selfenrollrole');
122: } else {
123: &Apache::ltiauth::invalid_request($r,24);
124: }
125: }
126: }
1.136 kruse 127: if (defined($form->{role})) {
128: my $envkey = 'user.role.'.$form->{role};
129: my $now=time;
130: my $then=$env{'user.login.time'};
131: my $refresh=$env{'user.refresh.time'};
132: my $update=$env{'user.update.time'};
133: if (!$update) {
134: $update = $then;
135: }
136: if (exists($env{$envkey})) {
137: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
138: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
139: \$trolecode,\$tstatus,\$tstart,\$tend);
140: if ($tstatus eq 'is') {
141: $destination .= ($destination =~ /\?/) ? '&' : '?';
142: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
143: $destination .= 'selectrole=1&'.$newrole.'=1';
144: }
145: }
146: }
147: if (defined($form->{symb})) {
148: my $destsymb = $form->{symb};
149: $destination .= ($destination =~ /\?/) ? '&' : '?';
150: if ($destsymb =~ /___/) {
151: # FIXME Need to deal with encrypted symbs and urls as needed.
152: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.137 raeburn 153: $desturl = &Apache::lonnet::clutter($desturl);
1.136 kruse 154: $desturl = &HTML::Entities::encode($desturl,'"<>&');
155: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
156: $destination .= 'destinationurl='.$desturl.
157: '&destsymb='.$destsymb;
158: } else {
159: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
160: $destination .= 'destinationurl='.$destsymb;
161: }
162: }
163: if ($destination =~ m{^/adm/roles}) {
164: $destination .= ($destination =~ /\?/) ? '&' : '?';
165: $destination .= 'source=login';
166: }
167:
1.150 raeburn 168: my $windowname = 'loncapaclient';
169: if ($env{'request.lti.login'}) {
170: $windowname .= 'lti';
171: }
172: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";');
1.136 kruse 173: my $brcrum = [{'href' => '',
174: 'text' => 'Successful Login'},];
1.140 raeburn 175: my $args = {'bread_crumbs' => $brcrum,};
176: unless ((defined($form->{role})) || (defined($form->{symb}))) {
177: my $update=$env{'user.update.time'};
178: if (!$update) {
179: $update = $env{'user.login.time'};
180: }
181: my %roles_in_env;
182: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
183: if ($showcount == 1) {
184: foreach my $rolecode (keys(%roles_in_env)) {
185: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
186: if ($cid) {
187: my %coursedescription =
188: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
189: if ($coursedescription{'type'} eq 'Placement') {
190: $args->{'crstype'} = 'Placement';
191: }
192: last;
193: }
194: }
195: }
196: }
1.136 kruse 197:
198: # ------------------------------------------------- Output for successful login
199:
200: &Apache::loncommon::content_type($r,'text/html');
1.143 raeburn 201: if ($securecookie) {
202: $r->headers_out->add('Set-cookie' => $securecookie);
203: }
204: if ($defaultcookie) {
205: $r->headers_out->add('Set-cookie' => $defaultcookie);
206: }
1.136 kruse 207: $r->send_http_header;
208:
1.153 ! raeburn 209: my ($start_page,$js,$pagebody,$end_page);
1.151 raeburn 210: if ($env{'request.lti.login'}) {
1.153 ! raeburn 211: $args = {'only_body' => 1};
! 212: if ($env{'request.lti.target'} eq '') {
! 213: my $ltitarget = (($destination =~ /\?/) ? '&' : '?').
! 214: 'ltitarget=iframe';
! 215: $js = <<"ENDJS";
! 216:
! 217: <script type="text/javascript">
! 218: // <![CDATA[
! 219: function setLTItarget() {
! 220: var newloc = '$destination';
! 221: if (parent !== window) {
! 222: newloc += '$ltitarget';
! 223: }
! 224: window.location.href=newloc;
! 225: }
! 226: // ]]>
! 227: </script>
! 228:
! 229: ENDJS
! 230: $args->{'add_entries'} = {'onload' => "javascript:setLTItarget();"};
! 231: $pagebody = '<noscript><span class="LC_warning">'
! 232: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
! 233: .'</span></noscript>';
! 234: } else {
! 235: $args->{'redirect'} = [0,$destination,1];
! 236: }
! 237: $start_page=&Apache::loncommon::start_page('',$js,$args);
1.151 raeburn 238: } else {
1.153 ! raeburn 239: $args->{'redirect'} = [0,$destination];
1.151 raeburn 240: $start_page=&Apache::loncommon::start_page('Successful Login',
1.153 ! raeburn 241: $js,$args);
1.149 raeburn 242:
1.151 raeburn 243: my %lt=&Apache::lonlocal::texthash(
244: 'wel' => 'Welcome',
245: 'pro' => 'Login problems?',
246: );
247: $pagebody = "<h1>$lt{'wel'}</h1>\n".
248: &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
249: my $loginhelp = &loginhelpdisplay($domain);
250: if ($loginhelp) {
251: $pagebody .= '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
252: }
1.136 kruse 253: }
1.153 ! raeburn 254: $end_page = &Apache::loncommon::end_page();
1.136 kruse 255: $r->print(<<ENDSUCCESS);
256: $start_page
257: $windowinfo
1.151 raeburn 258: $pagebody
1.136 kruse 259: $end_page
260: ENDSUCCESS
261: return;
262: }
263:
264: # --------------------------------------------------------------- Failed login!
265:
266: sub failed {
267: my ($r,$message,$form) = @_;
268: (undef,undef,undef,my $clientmathml,my $clientunicode) =
269: &Apache::loncommon::decode_user_agent();
270: my $args = {};
271: if ($clientunicode && !$clientmathml) {
272: $args = {'browser.unicode' => 1};
273: }
274:
275: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
276: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
277: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
278: if (&Apache::lonnet::domain($udom,'description') eq '') {
279: undef($udom);
280: }
281: my $retry = '/adm/login';
282: if ($uname eq $form->{'uname'}) {
283: $retry .= '?username='.$uname;
284: }
285: if ($udom) {
286: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
287: }
288: if (exists($form->{role})) {
289: my $role = &Apache::loncommon::cleanup_html($form->{role});
290: if ($role ne '') {
291: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
292: }
293: }
294: if (exists($form->{symb})) {
295: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
296: if ($symb ne '') {
297: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
298: }
299: }
300: my $end_page = &Apache::loncommon::end_page();
301: &Apache::loncommon::content_type($r,'text/html');
302: $r->send_http_header;
303: my @actions =
304: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
305: my $loginhelp = &loginhelpdisplay($udom);
306: if ($loginhelp) {
307: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
308: }
309: #FIXME: link to helpdesk might be added here
310:
311: $r->print(
312: $start_page
313: .'<h2>'.&mt('Sorry ...').'</h2>'
314: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
315: .&Apache::lonhtmlcommon::actionbox(\@actions)
316: .$end_page
317: );
318: }
319:
320: # ------------------------------------------------------------------ Rerouting!
321:
322: sub reroute {
323: my ($r) = @_;
324: &Apache::loncommon::content_type($r,'text/html');
325: $r->send_http_header;
326: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
327: .&mt('Please [_1]log in again[_2].');
328: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
329: }
330:
331: # ---------------------------------------------------------------- Main handler
332:
333: sub handler {
334: my $r = shift;
335: my $londocroot = $r->dir_config('lonDocRoot');
336: # Are we re-routing?
337: if (-e "$londocroot/lon-status/reroute.txt") {
338: &reroute($r);
339: return OK;
340: }
341:
342: &Apache::lonlocal::get_language_handle($r);
343:
344: # -------------------------------- Prevent users from attempting to login twice
345: my $handle = &Apache::lonnet::check_for_valid_session($r);
346: if ($handle ne '') {
347: my $lonidsdir=$r->dir_config('lonIDsDir');
348: if ($handle=~/^publicuser\_/) {
349: # For "public user" - remove it, we apparently really want to login
350: unlink($r->dir_config('lonIDsDir')."/$handle.id");
351: } else {
352: # Indeed, a valid token is found
353: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
354: &Apache::loncommon::content_type($r,'text/html');
355: $r->send_http_header;
356: my $start_page =
357: &Apache::loncommon::start_page('Already logged in');
358: my $end_page =
359: &Apache::loncommon::end_page();
360: my $dest = '/adm/roles';
361: if ($env{'form.firsturl'} ne '') {
362: $dest = $env{'form.firsturl'};
363: }
364: $r->print(
365: $start_page
366: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
367: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
368: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
369: .'</p>'
370: .$end_page
371: );
372: return OK;
373: }
374: }
375:
376: # ---------------------------------------------------- No valid token, continue
377:
378:
379: my $buffer;
380: if ($r->header_in('Content-length') > 0) {
381: $r->read($buffer,$r->header_in('Content-length'),0);
382: }
383: my %form;
384: foreach my $pair (split(/&/,$buffer)) {
385: my ($name,$value) = split(/=/,$pair);
386: $value =~ tr/+/ /;
387: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
388: $form{$name}=$value;
389: }
390:
391: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
392: &failed($r,'Username, password and domain need to be specified.',
393: \%form);
394: return OK;
395: }
396:
397: # split user logging in and "su"-user
398:
1.145 raeburn 399: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
1.136 kruse 400: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
401: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
1.145 raeburn 402: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
403: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
1.136 kruse 404:
405: my $role = $r->dir_config('lonRole');
406: my $domain = $r->dir_config('lonDefDomain');
407: my $prodir = $r->dir_config('lonUsersDir');
408: my $contact_name = &mt('LON-CAPA helpdesk');
409:
410: # ---------------------------------------- Get the information from login token
411:
412: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
413: $form{'serverid'});
414:
415: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
416: ($tmpinfo eq 'no_such_host')) {
417: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
418: return OK;
419: } else {
420: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
421: $form{'serverid'});
422: if ( $reply ne 'ok' ) {
423: &failed($r,'Session could not be opened.',\%form);
424: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
425: return OK;
426: }
427: }
428:
429: if (!&Apache::lonnet::domain($form{'udom'})) {
430: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
431: return OK;
432: }
433:
1.138 raeburn 434: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
1.136 kruse 435: if ($rolestr) {
436: $rolestr = &unescape($rolestr);
437: }
438: if ($symbstr) {
439: $symbstr= &unescape($symbstr);
440: }
1.138 raeburn 441: if ($iptokenstr) {
442: $iptokenstr = &unescape($iptokenstr);
443: }
1.136 kruse 444: if ($rolestr =~ /^role=/) {
445: (undef,$form{'role'}) = split('=',$rolestr);
446: }
447: if ($symbstr =~ /^symb=/) {
448: (undef,$form{'symb'}) = split('=',$symbstr);
449: }
1.138 raeburn 450: if ($iptokenstr =~ /^iptoken=/) {
451: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
452: }
1.136 kruse 453:
1.139 raeburn 454: my $upass = $ENV{HTTPS} ? $form{'upass0'}
455: : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
1.136 kruse 456:
457: # ---------------------------------------------------------------- Authenticate
458:
459: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
460: my ($cancreate,$statustocreate) =
461: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
462: my $defaultauth;
463: if (ref($cancreate) eq 'ARRAY') {
464: if (grep(/^login$/,@{$cancreate})) {
465: $defaultauth = 1;
466: }
467: }
468: my $clientcancheckhost = 1;
469: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
470: $form{'udom'},$defaultauth,
471: $clientcancheckhost);
1.149 raeburn 472:
1.136 kruse 473: # --------------------------------------------------------------------- Failed?
474:
475: if ($authhost eq 'no_host') {
476: &failed($r,'Username and/or password could not be authenticated.',
477: \%form);
478: return OK;
479: } elsif ($authhost eq 'no_account_on_host') {
480: if ($defaultauth) {
481: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
482: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
483: return OK;
484: }
485: my $start_page =
486: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
487: my $lonhost = $r->dir_config('lonHostID');
488: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
489: my $contacts =
490: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
491: $form{'udom'},$origmail);
492: my ($contact_email) = split(',',$contacts);
493: my $output =
494: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
495: $domdesc,'',$lonhost,
496: $contact_email,$contact_name,
497: undef,$statustocreate);
498: &Apache::loncommon::content_type($r,'text/html');
499: $r->send_http_header;
500: &Apache::createaccount::print_header($r,$start_page);
501: $r->print('<h3>'.&mt('Account creation').'</h3>'.
502: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
503: $output.&Apache::loncommon::end_page());
504: return OK;
505: } else {
506: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
507: return OK;
508: }
509: }
510:
511: if (($firsturl eq '') ||
512: ($firsturl=~/^\/adm\/(logout|remote)/)) {
513: $firsturl='/adm/roles';
514: }
515:
516: my $hosthere;
517: if ($form{'iptoken'}) {
1.138 raeburn 518: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
519: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.136 kruse 520: if (($sessiondata{'domain'} eq $form{'udom'}) &&
521: ($sessiondata{'username'} eq $form{'uname'})) {
522: $hosthere = 1;
523: }
524: }
525:
526: # --------------------------------- Are we attempting to login as somebody else?
527: if ($form{'suname'}) {
1.145 raeburn 528: my ($suname,$sudom,$sudomref);
529: $suname = $form{'suname'};
530: $sudom = $form{'udom'};
531: if ($form{'sudom'}) {
532: unless ($sudom eq $form{'sudom'}) {
533: if (&Apache::lonnet::domain($form{'sudom'})) {
534: $sudomref = [$form{'sudom'}];
535: $sudom = $form{'sudom'};
536: }
537: }
538: }
1.136 kruse 539: # ------------ see if the original user has enough privileges to pull this stunt
1.145 raeburn 540: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
1.136 kruse 541: # ---------------------------------------------------- see if the su-user exists
1.145 raeburn 542: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
1.136 kruse 543: # ------------------------------ see if the su-user is not too highly privileged
1.146 raeburn 544: if (&Apache::lonnet::privileged($suname,$sudom)) {
545: &Apache::lonnet::logthis('Attempted switch user to privileged user');
546: } else {
547: my $noprivswitch;
1.145 raeburn 548: #
549: # su-user's home server and user's home server must have one of:
1.147 raeburn 550: # (a) same domain
551: # (b) same primary library server for the two domains
552: # (c) same "internet domain" for primary library server(s) for home servers' domains
1.145 raeburn 553: #
1.148 raeburn 554: my $suprim = &Apache::lonnet::domain($sudom,'primary');
555: my $suintdom = &Apache::lonnet::internet_dom($suprim);
1.145 raeburn 556: unless ($sudom eq $form{'udom'}) {
1.148 raeburn 557: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
558: my $uintdom = &Apache::lonnet::internet_dom($uprim);
1.145 raeburn 559: unless ($suprim eq $uprim) {
560: unless ($suintdom eq $uintdom) {
561: &Apache::lonnet::logthis('Attempted switch user '
1.146 raeburn 562: .'to user with different "internet domain".');
563: $noprivswitch = 1;
1.145 raeburn 564: }
565: }
566: }
567:
1.146 raeburn 568: unless ($noprivswitch) {
569: #
570: # server where log-in occurs must have same "internet domain" as su-user's home
571: # server
572: #
573: my $lonhost = $r->dir_config('lonHostID');
574: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
1.148 raeburn 575: if ($hostintdom ne $suintdom) {
1.146 raeburn 576: &Apache::lonnet::logthis('Attempted switch user on a '
577: .'server with a different "internet domain".');
578: } else {
579:
1.136 kruse 580: # -------------------------------------------------------- actually switch users
1.145 raeburn 581:
1.146 raeburn 582: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
583: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
584: $form{'uname'}=$suname;
585: if ($form{'udom'} ne $sudom) {
586: $form{'udom'}=$sudom;
587: }
588: }
1.145 raeburn 589: }
1.136 kruse 590: }
591: }
592: } else {
593: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
594: }
595: }
596:
597: my ($is_balancer,$otherserver);
598:
599: unless ($hosthere) {
600: ($is_balancer,$otherserver) =
1.141 raeburn 601: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
602: if ($is_balancer) {
603: if ($otherserver eq '') {
604: my $lowest_load;
605: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
606: if ($lowest_load > 100) {
607: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
608: }
609: }
610: if ($otherserver ne '') {
611: my @hosts = &Apache::lonnet::current_machine_ids();
612: if (grep(/^\Q$otherserver\E$/,@hosts)) {
613: $hosthere = $otherserver;
614: }
615: }
616: }
1.136 kruse 617: }
618:
1.141 raeburn 619: if (($is_balancer) && (!$hosthere)) {
1.136 kruse 620: if ($otherserver) {
621: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
622: \%form);
623: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
624: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
625: $switchto .= '&origurl='.$firsturl;
626: }
627: if ($form{'role'}) {
628: $switchto .= '&role='.$form{'role'};
629: }
630: if ($form{'symb'}) {
631: $switchto .= '&symb='.$form{'symb'};
632: }
633: $r->internal_redirect($switchto);
634: } else {
635: $r->print(&noswitch());
636: }
637: return OK;
638: } else {
639: if (!&check_can_host($r,\%form,$authhost)) {
640: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
641: if ($otherserver) {
642: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
643: \%form);
644: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
645: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
646: $switchto .= '&origurl='.$firsturl;
647: }
648: if ($form{'role'}) {
649: $switchto .= '&role='.$form{'role'};
650: }
651: if ($form{'symb'}) {
652: $switchto .= '&symb='.$form{'symb'};
653: }
654: $r->internal_redirect($switchto);
655: } else {
656: $r->print(&noswitch());
657: }
658: return OK;
659: }
660:
661: # ------------------------------------------------------- Do the load balancing
662:
663: # ---------------------------------------------------------- Determine own load
664: my $loadlim = $r->dir_config('lonLoadLim');
665: my $loadavg;
666: {
667: my $loadfile=Apache::File->new('/proc/loadavg');
668: $loadavg=<$loadfile>;
669: }
670: $loadavg =~ s/\s.*//g;
671: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
672: my $userloadpercent=&Apache::lonnet::userload();
673:
674: # ---------------------------------------------------------- Are we overloaded?
675: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
676: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
677: if (!$unloaded) {
678: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
679: }
680: if ($unloaded) {
681: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
682: undef,\%form);
683: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
684: return OK;
685: }
686: }
1.141 raeburn 687: if (($is_balancer) && ($hosthere)) {
688: $form{'noloadbalance'} = $hosthere;
689: }
1.136 kruse 690: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
691: \%form);
692: return OK;
693: }
694: }
695:
696: sub check_can_host {
697: my ($r,$form,$authhost,$domdesc) = @_;
698: return unless (ref($form) eq 'HASH');
699: my $canhost = 1;
700: my $lonhost = $r->dir_config('lonHostID');
701: my $udom = $form->{'udom'};
702: my @intdoms;
703: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
704: if (ref($internet_names) eq 'ARRAY') {
705: @intdoms = @{$internet_names};
706: }
707: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
708: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
709: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
710: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
711: my $hostname = &Apache::lonnet::hostname($lonhost);
712: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
713: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
714: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
715: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
716: my $loncaparev;
717: if ($authhost eq 'no_account_on_host') {
718: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
719: } else {
720: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
721: }
722: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
723: $udomdefaults{'remotesessions'},
724: $defdomdefaults{'hostedsessions'});
725: }
726: unless ($canhost) {
727: if ($authhost eq 'no_account_on_host') {
728: my $checkloginvia = 1;
729: my ($login_host,$hostname) =
730: &Apache::lonnet::choose_server($udom,$checkloginvia);
731: &Apache::loncommon::content_type($r,'text/html');
732: $r->send_http_header;
733: if ($login_host ne '') {
734: my $protocol = $Apache::lonnet::protocol{$login_host};
735: $protocol = 'http' if ($protocol ne 'https');
736: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
737: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
738: '<h3>'.&mt('Account creation').'</h3>'.
739: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
740: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
741: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
742: &Apache::loncommon::end_page());
743: } else {
744: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
745: '<h3>'.&mt('Account creation unavailable').'</h3>'.
746: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
747: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
748: &Apache::loncommon::end_page());
749: }
750: } else {
751: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
752: $form);
753: my ($otherserver) = &Apache::lonnet::choose_server($udom);
754: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
755: }
756: }
757: return $canhost;
758: }
759:
760: sub noswitch {
761: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
762: '<h3>'.&mt('Session unavailable').'</h3>'.
763: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
764: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
765: &Apache::loncommon::end_page();
766: return $result;
767: }
768:
769: sub loginhelpdisplay {
770: my ($authdomain) = @_;
771: my $login_help = 1;
772: my $lang = &Apache::lonlocal::current_language();
773: if ($login_help) {
774: my $dom = $authdomain;
775: if ($dom eq '') {
776: $dom = &Apache::lonnet::default_login_domain();
777: }
778: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
779: my $loginhelp_url;
780: if ($lang) {
781: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
782: if ($loginhelp_url ne '') {
783: return $loginhelp_url;
784: }
785: }
786: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
787: if ($loginhelp_url ne '') {
788: return $loginhelp_url;
789: } else {
790: return '/adm/loginproblems.html';
791: }
792: }
793: return;
794: }
795:
796: 1;
797: __END__
798:
799:
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