Annotation of loncom/auth/lonauth.pm, revision 1.150
1.136 kruse 1: # The LearningOnline Network
2: # User Authentication Module
3: #
1.150 ! raeburn 4: # $Id: lonauth.pm,v 1.149 2018/03/23 01:01:29 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: $r->send_http_header;
109: &Apache::ltiauth::lti_reqcrs($r,$domain,$form,$username,$domain);
110: return;
111: }
112: if ($env{'request.lti.selfenrollrole'}) {
113: if (&Apache::ltiauth::lti_enroll($username,$domain,
114: $env{'request.lti.selfenrollrole'}) eq 'ok') {
115: $form->{'role'} = $env{'request.lti.selfenrollrole'};
116: &Apache::lonnet::delenv('request.lti.selfenrollrole');
117: } else {
118: &Apache::ltiauth::invalid_request($r,24);
119: }
120: }
121: }
1.136 kruse 122: if (defined($form->{role})) {
123: my $envkey = 'user.role.'.$form->{role};
124: my $now=time;
125: my $then=$env{'user.login.time'};
126: my $refresh=$env{'user.refresh.time'};
127: my $update=$env{'user.update.time'};
128: if (!$update) {
129: $update = $then;
130: }
131: if (exists($env{$envkey})) {
132: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
133: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
134: \$trolecode,\$tstatus,\$tstart,\$tend);
135: if ($tstatus eq 'is') {
136: $destination .= ($destination =~ /\?/) ? '&' : '?';
137: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
138: $destination .= 'selectrole=1&'.$newrole.'=1';
139: }
140: }
141: }
142: if (defined($form->{symb})) {
143: my $destsymb = $form->{symb};
144: $destination .= ($destination =~ /\?/) ? '&' : '?';
145: if ($destsymb =~ /___/) {
146: # FIXME Need to deal with encrypted symbs and urls as needed.
147: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.137 raeburn 148: $desturl = &Apache::lonnet::clutter($desturl);
1.136 kruse 149: $desturl = &HTML::Entities::encode($desturl,'"<>&');
150: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
151: $destination .= 'destinationurl='.$desturl.
152: '&destsymb='.$destsymb;
153: } else {
154: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
155: $destination .= 'destinationurl='.$destsymb;
156: }
157: }
158: if ($destination =~ m{^/adm/roles}) {
159: $destination .= ($destination =~ /\?/) ? '&' : '?';
160: $destination .= 'source=login';
161: }
162:
1.150 ! raeburn 163: my $windowname = 'loncapaclient';
! 164: if ($env{'request.lti.login'}) {
! 165: $windowname .= 'lti';
! 166: }
! 167: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="'.$windowname.'";');
1.136 kruse 168: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
169: my $brcrum = [{'href' => '',
170: 'text' => 'Successful Login'},];
1.140 raeburn 171: my $args = {'bread_crumbs' => $brcrum,};
172: unless ((defined($form->{role})) || (defined($form->{symb}))) {
173: my $update=$env{'user.update.time'};
174: if (!$update) {
175: $update = $env{'user.login.time'};
176: }
177: my %roles_in_env;
178: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update);
179: if ($showcount == 1) {
180: foreach my $rolecode (keys(%roles_in_env)) {
181: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)});
182: if ($cid) {
183: my %coursedescription =
184: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'});
185: if ($coursedescription{'type'} eq 'Placement') {
186: $args->{'crstype'} = 'Placement';
187: }
188: last;
189: }
190: }
191: }
192: }
1.136 kruse 193:
194: # ------------------------------------------------- Output for successful login
195:
196: &Apache::loncommon::content_type($r,'text/html');
1.143 raeburn 197: if ($securecookie) {
198: $r->headers_out->add('Set-cookie' => $securecookie);
199: }
200: if ($defaultcookie) {
201: $r->headers_out->add('Set-cookie' => $defaultcookie);
202: }
1.136 kruse 203: $r->send_http_header;
204:
1.149 raeburn 205: my $start_page=&Apache::loncommon::start_page('Successful Login',
206: $header,$args);
207: my $end_page =&Apache::loncommon::end_page();
208:
209: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
210:
1.136 kruse 211: my %lt=&Apache::lonlocal::texthash(
212: 'wel' => 'Welcome',
213: 'pro' => 'Login problems?',
214: );
215: my $loginhelp = &loginhelpdisplay($domain);
216: if ($loginhelp) {
217: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
218: }
219:
220: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
221: $r->print(<<ENDSUCCESS);
222: $start_page
223: $windowinfo
224: <h1>$lt{'wel'}</h1>
225: $welcome
226: $loginhelp
227: $continuelink
228: $end_page
229: ENDSUCCESS
230: return;
231: }
232:
233: # --------------------------------------------------------------- Failed login!
234:
235: sub failed {
236: my ($r,$message,$form) = @_;
237: (undef,undef,undef,my $clientmathml,my $clientunicode) =
238: &Apache::loncommon::decode_user_agent();
239: my $args = {};
240: if ($clientunicode && !$clientmathml) {
241: $args = {'browser.unicode' => 1};
242: }
243:
244: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
245: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
246: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
247: if (&Apache::lonnet::domain($udom,'description') eq '') {
248: undef($udom);
249: }
250: my $retry = '/adm/login';
251: if ($uname eq $form->{'uname'}) {
252: $retry .= '?username='.$uname;
253: }
254: if ($udom) {
255: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
256: }
257: if (exists($form->{role})) {
258: my $role = &Apache::loncommon::cleanup_html($form->{role});
259: if ($role ne '') {
260: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
261: }
262: }
263: if (exists($form->{symb})) {
264: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
265: if ($symb ne '') {
266: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
267: }
268: }
269: my $end_page = &Apache::loncommon::end_page();
270: &Apache::loncommon::content_type($r,'text/html');
271: $r->send_http_header;
272: my @actions =
273: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
274: my $loginhelp = &loginhelpdisplay($udom);
275: if ($loginhelp) {
276: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
277: }
278: #FIXME: link to helpdesk might be added here
279:
280: $r->print(
281: $start_page
282: .'<h2>'.&mt('Sorry ...').'</h2>'
283: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
284: .&Apache::lonhtmlcommon::actionbox(\@actions)
285: .$end_page
286: );
287: }
288:
289: # ------------------------------------------------------------------ Rerouting!
290:
291: sub reroute {
292: my ($r) = @_;
293: &Apache::loncommon::content_type($r,'text/html');
294: $r->send_http_header;
295: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
296: .&mt('Please [_1]log in again[_2].');
297: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
298: }
299:
300: # ---------------------------------------------------------------- Main handler
301:
302: sub handler {
303: my $r = shift;
304: my $londocroot = $r->dir_config('lonDocRoot');
305: # Are we re-routing?
306: if (-e "$londocroot/lon-status/reroute.txt") {
307: &reroute($r);
308: return OK;
309: }
310:
311: &Apache::lonlocal::get_language_handle($r);
312:
313: # -------------------------------- Prevent users from attempting to login twice
314: my $handle = &Apache::lonnet::check_for_valid_session($r);
315: if ($handle ne '') {
316: my $lonidsdir=$r->dir_config('lonIDsDir');
317: if ($handle=~/^publicuser\_/) {
318: # For "public user" - remove it, we apparently really want to login
319: unlink($r->dir_config('lonIDsDir')."/$handle.id");
320: } else {
321: # Indeed, a valid token is found
322: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
323: &Apache::loncommon::content_type($r,'text/html');
324: $r->send_http_header;
325: my $start_page =
326: &Apache::loncommon::start_page('Already logged in');
327: my $end_page =
328: &Apache::loncommon::end_page();
329: my $dest = '/adm/roles';
330: if ($env{'form.firsturl'} ne '') {
331: $dest = $env{'form.firsturl'};
332: }
333: $r->print(
334: $start_page
335: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
336: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
337: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
338: .'</p>'
339: .$end_page
340: );
341: return OK;
342: }
343: }
344:
345: # ---------------------------------------------------- No valid token, continue
346:
347:
348: my $buffer;
349: if ($r->header_in('Content-length') > 0) {
350: $r->read($buffer,$r->header_in('Content-length'),0);
351: }
352: my %form;
353: foreach my $pair (split(/&/,$buffer)) {
354: my ($name,$value) = split(/=/,$pair);
355: $value =~ tr/+/ /;
356: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
357: $form{$name}=$value;
358: }
359:
360: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
361: &failed($r,'Username, password and domain need to be specified.',
362: \%form);
363: return OK;
364: }
365:
366: # split user logging in and "su"-user
367:
1.145 raeburn 368: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'});
1.136 kruse 369: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
370: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
1.145 raeburn 371: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'});
372: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'});
1.136 kruse 373:
374: my $role = $r->dir_config('lonRole');
375: my $domain = $r->dir_config('lonDefDomain');
376: my $prodir = $r->dir_config('lonUsersDir');
377: my $contact_name = &mt('LON-CAPA helpdesk');
378:
379: # ---------------------------------------- Get the information from login token
380:
381: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
382: $form{'serverid'});
383:
384: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
385: ($tmpinfo eq 'no_such_host')) {
386: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
387: return OK;
388: } else {
389: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
390: $form{'serverid'});
391: if ( $reply ne 'ok' ) {
392: &failed($r,'Session could not be opened.',\%form);
393: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
394: return OK;
395: }
396: }
397:
398: if (!&Apache::lonnet::domain($form{'udom'})) {
399: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
400: return OK;
401: }
402:
1.138 raeburn 403: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
1.136 kruse 404: if ($rolestr) {
405: $rolestr = &unescape($rolestr);
406: }
407: if ($symbstr) {
408: $symbstr= &unescape($symbstr);
409: }
1.138 raeburn 410: if ($iptokenstr) {
411: $iptokenstr = &unescape($iptokenstr);
412: }
1.136 kruse 413: if ($rolestr =~ /^role=/) {
414: (undef,$form{'role'}) = split('=',$rolestr);
415: }
416: if ($symbstr =~ /^symb=/) {
417: (undef,$form{'symb'}) = split('=',$symbstr);
418: }
1.138 raeburn 419: if ($iptokenstr =~ /^iptoken=/) {
420: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
421: }
1.136 kruse 422:
1.139 raeburn 423: my $upass = $ENV{HTTPS} ? $form{'upass0'}
424: : &Apache::loncommon::des_decrypt($key,$form{'upass0'});
1.136 kruse 425:
426: # ---------------------------------------------------------------- Authenticate
427:
428: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
429: my ($cancreate,$statustocreate) =
430: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
431: my $defaultauth;
432: if (ref($cancreate) eq 'ARRAY') {
433: if (grep(/^login$/,@{$cancreate})) {
434: $defaultauth = 1;
435: }
436: }
437: my $clientcancheckhost = 1;
438: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
439: $form{'udom'},$defaultauth,
440: $clientcancheckhost);
1.149 raeburn 441:
1.136 kruse 442: # --------------------------------------------------------------------- Failed?
443:
444: if ($authhost eq 'no_host') {
445: &failed($r,'Username and/or password could not be authenticated.',
446: \%form);
447: return OK;
448: } elsif ($authhost eq 'no_account_on_host') {
449: if ($defaultauth) {
450: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
451: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
452: return OK;
453: }
454: my $start_page =
455: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
456: my $lonhost = $r->dir_config('lonHostID');
457: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
458: my $contacts =
459: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
460: $form{'udom'},$origmail);
461: my ($contact_email) = split(',',$contacts);
462: my $output =
463: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
464: $domdesc,'',$lonhost,
465: $contact_email,$contact_name,
466: undef,$statustocreate);
467: &Apache::loncommon::content_type($r,'text/html');
468: $r->send_http_header;
469: &Apache::createaccount::print_header($r,$start_page);
470: $r->print('<h3>'.&mt('Account creation').'</h3>'.
471: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
472: $output.&Apache::loncommon::end_page());
473: return OK;
474: } else {
475: &failed($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);
476: return OK;
477: }
478: }
479:
480: if (($firsturl eq '') ||
481: ($firsturl=~/^\/adm\/(logout|remote)/)) {
482: $firsturl='/adm/roles';
483: }
484:
485: my $hosthere;
486: if ($form{'iptoken'}) {
1.138 raeburn 487: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
488: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.136 kruse 489: if (($sessiondata{'domain'} eq $form{'udom'}) &&
490: ($sessiondata{'username'} eq $form{'uname'})) {
491: $hosthere = 1;
492: }
493: }
494:
495: # --------------------------------- Are we attempting to login as somebody else?
496: if ($form{'suname'}) {
1.145 raeburn 497: my ($suname,$sudom,$sudomref);
498: $suname = $form{'suname'};
499: $sudom = $form{'udom'};
500: if ($form{'sudom'}) {
501: unless ($sudom eq $form{'sudom'}) {
502: if (&Apache::lonnet::domain($form{'sudom'})) {
503: $sudomref = [$form{'sudom'}];
504: $sudom = $form{'sudom'};
505: }
506: }
507: }
1.136 kruse 508: # ------------ see if the original user has enough privileges to pull this stunt
1.145 raeburn 509: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) {
1.136 kruse 510: # ---------------------------------------------------- see if the su-user exists
1.145 raeburn 511: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') {
1.136 kruse 512: # ------------------------------ see if the su-user is not too highly privileged
1.146 raeburn 513: if (&Apache::lonnet::privileged($suname,$sudom)) {
514: &Apache::lonnet::logthis('Attempted switch user to privileged user');
515: } else {
516: my $noprivswitch;
1.145 raeburn 517: #
518: # su-user's home server and user's home server must have one of:
1.147 raeburn 519: # (a) same domain
520: # (b) same primary library server for the two domains
521: # (c) same "internet domain" for primary library server(s) for home servers' domains
1.145 raeburn 522: #
1.148 raeburn 523: my $suprim = &Apache::lonnet::domain($sudom,'primary');
524: my $suintdom = &Apache::lonnet::internet_dom($suprim);
1.145 raeburn 525: unless ($sudom eq $form{'udom'}) {
1.148 raeburn 526: my $uprim = &Apache::lonnet::domain($form{'udom'},'primary');
527: my $uintdom = &Apache::lonnet::internet_dom($uprim);
1.145 raeburn 528: unless ($suprim eq $uprim) {
529: unless ($suintdom eq $uintdom) {
530: &Apache::lonnet::logthis('Attempted switch user '
1.146 raeburn 531: .'to user with different "internet domain".');
532: $noprivswitch = 1;
1.145 raeburn 533: }
534: }
535: }
536:
1.146 raeburn 537: unless ($noprivswitch) {
538: #
539: # server where log-in occurs must have same "internet domain" as su-user's home
540: # server
541: #
542: my $lonhost = $r->dir_config('lonHostID');
543: my $hostintdom = &Apache::lonnet::internet_dom($lonhost);
1.148 raeburn 544: if ($hostintdom ne $suintdom) {
1.146 raeburn 545: &Apache::lonnet::logthis('Attempted switch user on a '
546: .'server with a different "internet domain".');
547: } else {
548:
1.136 kruse 549: # -------------------------------------------------------- actually switch users
1.145 raeburn 550:
1.146 raeburn 551: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.
552: $form{'udom'}.' logging in as '.$suname.':'.$sudom);
553: $form{'uname'}=$suname;
554: if ($form{'udom'} ne $sudom) {
555: $form{'udom'}=$sudom;
556: }
557: }
1.145 raeburn 558: }
1.136 kruse 559: }
560: }
561: } else {
562: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
563: }
564: }
565:
566: my ($is_balancer,$otherserver);
567:
568: unless ($hosthere) {
569: ($is_balancer,$otherserver) =
1.141 raeburn 570: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login');
571: if ($is_balancer) {
572: if ($otherserver eq '') {
573: my $lowest_load;
574: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'});
575: if ($lowest_load > 100) {
576: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'});
577: }
578: }
579: if ($otherserver ne '') {
580: my @hosts = &Apache::lonnet::current_machine_ids();
581: if (grep(/^\Q$otherserver\E$/,@hosts)) {
582: $hosthere = $otherserver;
583: }
584: }
585: }
1.136 kruse 586: }
587:
1.141 raeburn 588: if (($is_balancer) && (!$hosthere)) {
1.136 kruse 589: if ($otherserver) {
590: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
591: \%form);
592: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
593: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
594: $switchto .= '&origurl='.$firsturl;
595: }
596: if ($form{'role'}) {
597: $switchto .= '&role='.$form{'role'};
598: }
599: if ($form{'symb'}) {
600: $switchto .= '&symb='.$form{'symb'};
601: }
602: $r->internal_redirect($switchto);
603: } else {
604: $r->print(&noswitch());
605: }
606: return OK;
607: } else {
608: if (!&check_can_host($r,\%form,$authhost)) {
609: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
610: if ($otherserver) {
611: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
612: \%form);
613: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
614: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
615: $switchto .= '&origurl='.$firsturl;
616: }
617: if ($form{'role'}) {
618: $switchto .= '&role='.$form{'role'};
619: }
620: if ($form{'symb'}) {
621: $switchto .= '&symb='.$form{'symb'};
622: }
623: $r->internal_redirect($switchto);
624: } else {
625: $r->print(&noswitch());
626: }
627: return OK;
628: }
629:
630: # ------------------------------------------------------- Do the load balancing
631:
632: # ---------------------------------------------------------- Determine own load
633: my $loadlim = $r->dir_config('lonLoadLim');
634: my $loadavg;
635: {
636: my $loadfile=Apache::File->new('/proc/loadavg');
637: $loadavg=<$loadfile>;
638: }
639: $loadavg =~ s/\s.*//g;
640: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
641: my $userloadpercent=&Apache::lonnet::userload();
642:
643: # ---------------------------------------------------------- Are we overloaded?
644: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
645: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
646: if (!$unloaded) {
647: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
648: }
649: if ($unloaded) {
650: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
651: undef,\%form);
652: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
653: return OK;
654: }
655: }
1.141 raeburn 656: if (($is_balancer) && ($hosthere)) {
657: $form{'noloadbalance'} = $hosthere;
658: }
1.136 kruse 659: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
660: \%form);
661: return OK;
662: }
663: }
664:
665: sub check_can_host {
666: my ($r,$form,$authhost,$domdesc) = @_;
667: return unless (ref($form) eq 'HASH');
668: my $canhost = 1;
669: my $lonhost = $r->dir_config('lonHostID');
670: my $udom = $form->{'udom'};
671: my @intdoms;
672: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
673: if (ref($internet_names) eq 'ARRAY') {
674: @intdoms = @{$internet_names};
675: }
676: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
677: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
678: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
679: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
680: my $hostname = &Apache::lonnet::hostname($lonhost);
681: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
682: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
683: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
684: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
685: my $loncaparev;
686: if ($authhost eq 'no_account_on_host') {
687: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
688: } else {
689: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
690: }
691: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
692: $udomdefaults{'remotesessions'},
693: $defdomdefaults{'hostedsessions'});
694: }
695: unless ($canhost) {
696: if ($authhost eq 'no_account_on_host') {
697: my $checkloginvia = 1;
698: my ($login_host,$hostname) =
699: &Apache::lonnet::choose_server($udom,$checkloginvia);
700: &Apache::loncommon::content_type($r,'text/html');
701: $r->send_http_header;
702: if ($login_host ne '') {
703: my $protocol = $Apache::lonnet::protocol{$login_host};
704: $protocol = 'http' if ($protocol ne 'https');
705: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
706: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
707: '<h3>'.&mt('Account creation').'</h3>'.
708: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
709: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
710: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
711: &Apache::loncommon::end_page());
712: } else {
713: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
714: '<h3>'.&mt('Account creation unavailable').'</h3>'.
715: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
716: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
717: &Apache::loncommon::end_page());
718: }
719: } else {
720: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
721: $form);
722: my ($otherserver) = &Apache::lonnet::choose_server($udom);
723: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
724: }
725: }
726: return $canhost;
727: }
728:
729: sub noswitch {
730: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
731: '<h3>'.&mt('Session unavailable').'</h3>'.
732: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
733: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
734: &Apache::loncommon::end_page();
735: return $result;
736: }
737:
738: sub loginhelpdisplay {
739: my ($authdomain) = @_;
740: my $login_help = 1;
741: my $lang = &Apache::lonlocal::current_language();
742: if ($login_help) {
743: my $dom = $authdomain;
744: if ($dom eq '') {
745: $dom = &Apache::lonnet::default_login_domain();
746: }
747: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
748: my $loginhelp_url;
749: if ($lang) {
750: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
751: if ($loginhelp_url ne '') {
752: return $loginhelp_url;
753: }
754: }
755: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
756: if ($loginhelp_url ne '') {
757: return $loginhelp_url;
758: } else {
759: return '/adm/loginproblems.html';
760: }
761: }
762: return;
763: }
764:
765: 1;
766: __END__
767:
768:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonauth.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth