Annotation of loncom/auth/lonauth.pm, revision 1.121.2.12
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.121.2.12! raeburn 4: # $Id: lonauth.pm,v 1.121.2.11 2014/05/04 15:16:10 raeburn Exp $
1.27 www 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: #
1.1 albertel 28:
29: package Apache::lonauth;
30:
1.18 albertel 31: use strict;
1.78 albertel 32: use LONCAPA;
1.1 albertel 33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
1.26 harris41 35: use DynaLoader; # for Crypt::DES version
1.8 www 36: use Crypt::DES;
1.45 matthew 37: use Apache::loncommon();
1.66 albertel 38: use Apache::lonnet;
1.12 www 39: use Apache::lonmenu();
1.90 raeburn 40: use Apache::createaccount;
1.18 albertel 41: use Fcntl qw(:flock);
1.56 www 42: use Apache::lonlocal;
1.119 raeburn 43: use Apache::File();
1.101 raeburn 44: use HTML::Entities;
1.85 albertel 45:
1.1 albertel 46: # ------------------------------------------------------------ Successful login
1.85 albertel 47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
49: $form) = @_;
1.1 albertel 50:
1.85 albertel 51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
1.86 albertel 55: {'extra_env' => $extra_env,});
1.4 www 56:
1.69 albertel 57: my $public=($username eq 'public' && $domain eq 'public');
58:
1.85 albertel 59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78 albertel 60:
1.7 www 61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 65:
1.14 www 66: # ------------------------------------------------- Check for critical messages
67:
1.21 www 68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 69: if ($what[0]) {
1.22 www 70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 71: $lowerurl='/adm/email?critical=display';
1.14 www 72: }
73: }
74:
1.5 www 75: # ------------------------------------------------------------ Get cookie ready
1.1 albertel 76: $cookie="lonID=$cookie; path=/";
1.12 www 77: # -------------------------------------------------------- Menu script and info
1.100 raeburn 78: my $destination = $lowerurl;
79:
80: if (defined($form->{role})) {
81: my $envkey = 'user.role.'.$form->{role};
82: my $now=time;
83: my $then=$env{'user.login.time'};
84: my $refresh=$env{'user.refresh.time'};
1.111 raeburn 85: my $update=$env{'user.update.time'};
86: if (!$update) {
87: $update = $then;
88: }
1.100 raeburn 89: if (exists($env{$envkey})) {
90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
1.111 raeburn 91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
1.100 raeburn 92: \$trolecode,\$tstatus,\$tstart,\$tend);
93: if ($tstatus eq 'is') {
1.101 raeburn 94: $destination .= ($destination =~ /\?/) ? '&' : '?';
95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
96: $destination .= 'selectrole=1&'.$newrole.'=1';
1.100 raeburn 97: }
98: }
99: }
1.101 raeburn 100: if (defined($form->{symb})) {
101: my $destsymb = $form->{symb};
102: $destination .= ($destination =~ /\?/) ? '&' : '?';
103: if ($destsymb =~ /___/) {
104: # FIXME Need to deal with encrypted symbs and urls as needed.
105: my ($map,$resid,$desturl)=split(/___/,$destsymb);
1.121.2.3 raeburn 106: unless ($desturl=~/^(adm|editupload|public)/) {
1.101 raeburn 107: $desturl = &Apache::lonnet::clutter($desturl);
108: }
109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
1.121.2.8 raeburn 111: $destination .= 'destinationurl='.$desturl.
1.101 raeburn 112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
1.121.2.8 raeburn 115: $destination .= 'destinationurl='.$destsymb;
1.101 raeburn 116: }
117: }
1.111 raeburn 118: if ($destination =~ m{^/adm/roles}) {
119: $destination .= ($destination =~ /\?/) ? '&' : '?';
120: $destination .= 'source=login';
121: }
1.100 raeburn 122:
1.121.2.1 raeburn 123: my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
124: my $startupremote=&Apache::lonmenu::startupremote($destination);
125: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
126: my $setflags=&Apache::lonmenu::setflags();
127: my $maincall=&Apache::lonmenu::maincall();
1.99 bisitz 128: my $brcrum = [{'href' => '',
129: 'text' => 'Successful Login'},];
1.74 albertel 130: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.121.2.1 raeburn 131: $startupremote,
132: {'no_inline_link' => 1,
133: 'bread_crumbs' => $brcrum,});
1.74 albertel 134: my $end_page =&Apache::loncommon::end_page();
135:
1.121.2.1 raeburn 136: my $continuelink;
137: if ($env{'environment.remote'} eq 'off') {
138: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
139: }
1.5 www 140: # ------------------------------------------------- Output for successful login
141:
1.74 albertel 142: &Apache::loncommon::content_type($r,'text/html');
143: $r->header_out('Set-cookie' => $cookie);
144: $r->send_http_header;
1.1 albertel 145:
1.58 www 146: my %lt=&Apache::lonlocal::texthash(
147: 'wel' => 'Welcome',
1.92 bisitz 148: 'pro' => 'Login problems?',
1.58 www 149: );
1.121.2.2 raeburn 150: my $loginhelp = &loginhelpdisplay($domain);
151: if ($loginhelp) {
152: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
153: }
154:
1.112 raeburn 155: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
1.1 albertel 156: $r->print(<<ENDSUCCESS);
1.74 albertel 157: $start_page
1.121.2.1 raeburn 158: $setflags
1.19 www 159: $windowinfo
1.58 www 160: <h1>$lt{'wel'}</h1>
1.121.2.2 raeburn 161: $welcome
162: $loginhelp
1.121.2.1 raeburn 163: $remoteinfo
164: $maincall
1.64 albertel 165: $continuelink
1.74 albertel 166: $end_page
1.1 albertel 167: ENDSUCCESS
1.121.2.11 raeburn 168: return;
1.1 albertel 169: }
170:
171: # --------------------------------------------------------------- Failed login!
172:
173: sub failed {
1.85 albertel 174: my ($r,$message,$form) = @_;
1.121.2.7 raeburn 175: (undef,undef,undef,my $clientmathml,my $clientunicode) =
176: &Apache::loncommon::decode_user_agent();
177: my $args = {};
178: if ($clientunicode && !$clientmathml) {
179: $args = {'browser.unicode' => 1};
180: }
181:
182: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
183: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
184: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
185: if (&Apache::lonnet::domain($udom,'description') eq '') {
186: undef($udom);
187: }
188: my $retry = '/adm/login';
189: if ($uname eq $form->{'uname'}) {
190: $retry .= '?username='.$uname;
191: }
192: if ($udom) {
193: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
194: }
1.100 raeburn 195: if (exists($form->{role})) {
1.121.2.7 raeburn 196: my $role = &Apache::loncommon::cleanup_html($form->{role});
197: if ($role ne '') {
198: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
199: }
1.100 raeburn 200: }
201: if (exists($form->{symb})) {
1.121.2.7 raeburn 202: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
203: if ($symb ne '') {
204: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
205: }
1.100 raeburn 206: }
1.121.2.7 raeburn 207: my $end_page = &Apache::loncommon::end_page();
1.74 albertel 208: &Apache::loncommon::content_type($r,'text/html');
209: $r->send_http_header;
1.121.2.9 raeburn 210: my @actions =
211: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
1.121.2.7 raeburn 212: my $loginhelp = &loginhelpdisplay($udom);
1.121.2.2 raeburn 213: if ($loginhelp) {
1.121.2.9 raeburn 214: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
1.121.2.2 raeburn 215: }
1.121.2.9 raeburn 216: #FIXME: link to helpdesk might be added here
1.121.2.2 raeburn 217:
1.92 bisitz 218: $r->print(
219: $start_page
1.121.2.9 raeburn 220: .'<h2>'.&mt('Sorry ...').'</h2>'
221: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
222: .&Apache::lonhtmlcommon::actionbox(\@actions)
1.92 bisitz 223: .$end_page
224: );
225: }
1.60 www 226:
1.55 www 227: # ------------------------------------------------------------------ Rerouting!
228:
229: sub reroute {
1.74 albertel 230: my ($r) = @_;
231: &Apache::loncommon::content_type($r,'text/html');
232: $r->send_http_header;
1.121.2.5 raeburn 233: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
1.92 bisitz 234: .&mt('Please [_1]log in again[_2].');
1.121.2.5 raeburn 235: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
1.55 www 236: }
237:
1.1 albertel 238: # ---------------------------------------------------------------- Main handler
239:
240: sub handler {
241: my $r = shift;
1.120 raeburn 242: my $londocroot = $r->dir_config('lonDocRoot');
1.85 albertel 243: my $form;
1.55 www 244: # Are we re-routing?
1.120 raeburn 245: if (-e "$londocroot/lon-status/reroute.txt") {
1.55 www 246: &reroute($r);
247: return OK;
248: }
1.56 www 249:
1.57 www 250: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 251:
1.59 www 252: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 253: my $handle = &Apache::lonnet::check_for_valid_session($r);
254: if ($handle ne '') {
1.103 raeburn 255: my $lonidsdir=$r->dir_config('lonIDsDir');
256: if ($handle=~/^publicuser\_/) {
257: # For "public user" - remove it, we apparently really want to login
258: unlink($r->dir_config('lonIDsDir')."/$handle.id");
259: } else {
1.59 www 260: # Indeed, a valid token is found
1.103 raeburn 261: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
262: &Apache::loncommon::content_type($r,'text/html');
263: $r->send_http_header;
264: my $start_page =
265: &Apache::loncommon::start_page('Already logged in');
266: my $end_page =
267: &Apache::loncommon::end_page();
1.105 raeburn 268: my $dest = '/adm/roles';
269: if ($env{'form.firsturl'} ne '') {
270: $dest = $env{'form.firsturl'};
271: }
1.103 raeburn 272: $r->print(
273: $start_page
1.121.2.4 raeburn 274: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
1.103 raeburn 275: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.105 raeburn 276: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
1.103 raeburn 277: .'</p>'
278: .$end_page
279: );
280: return OK;
281: }
1.59 www 282: }
283:
284: # ---------------------------------------------------- No valid token, continue
285:
286:
1.1 albertel 287: my $buffer;
1.84 albertel 288: if ($r->header_in('Content-length') > 0) {
289: $r->read($buffer,$r->header_in('Content-length'),0);
290: }
1.85 albertel 291: my %form;
292: foreach my $pair (split(/&/,$buffer)) {
293: my ($name,$value) = split(/=/,$pair);
1.7 www 294: $value =~ tr/+/ /;
295: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 296: $form{$name}=$value;
1.121.2.6 raeburn 297: }
1.1 albertel 298:
1.85 albertel 299: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
300: &failed($r,'Username, password and domain need to be specified.',
301: \%form);
1.1 albertel 302: return OK;
303: }
1.61 www 304:
305: # split user logging in and "su"-user
306:
1.85 albertel 307: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 308: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
309: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
310: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 311:
312: my $role = $r->dir_config('lonRole');
313: my $domain = $r->dir_config('lonDefDomain');
314: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 315: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 316:
1.8 www 317: # ---------------------------------------- Get the information from login token
318:
1.85 albertel 319: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
320: $form{'serverid'});
1.121.2.7 raeburn 321:
1.114 raeburn 322: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
323: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 324: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 325: return OK;
1.44 www 326: } else {
1.85 albertel 327: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
328: $form{'serverid'});
1.77 albertel 329: if ( $reply ne 'ok' ) {
1.85 albertel 330: &failed($r,'Session could not be opened.',\%form);
331: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 332: return OK;
1.44 www 333: }
1.8 www 334: }
1.100 raeburn 335:
1.93 raeburn 336: if (!&Apache::lonnet::domain($form{'udom'})) {
337: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
338: return OK;
339: }
1.100 raeburn 340:
1.121.2.12! raeburn 341: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo);
1.100 raeburn 342: if ($rolestr) {
343: $rolestr = &unescape($rolestr);
344: }
345: if ($symbstr) {
346: $symbstr= &unescape($symbstr);
347: }
1.121.2.12! raeburn 348: if ($iptokenstr) {
! 349: $iptokenstr = &unescape($iptokenstr);
! 350: }
1.100 raeburn 351: if ($rolestr =~ /^role=/) {
352: (undef,$form{'role'}) = split('=',$rolestr);
353: }
354: if ($symbstr =~ /^symb=/) {
355: (undef,$form{'symb'}) = split('=',$symbstr);
356: }
1.121.2.12! raeburn 357: if ($iptokenstr =~ /^iptoken=/) {
! 358: (undef,$form{'iptoken'}) = split('=',$iptokenstr);
! 359: }
1.8 www 360:
361: my $keybin=pack("H16",$key);
362:
1.26 harris41 363: my $cipher;
364: if ($Crypt::DES::VERSION>=2.03) {
365: $cipher=new Crypt::DES $keybin;
366: }
367: else {
368: $cipher=new DES $keybin;
369: }
1.67 www 370: my $upass='';
371: for (my $i=0;$i<=2;$i++) {
372: my $chunk=
1.85 albertel 373: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 374:
1.67 www 375: $chunk.=
1.85 albertel 376: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 377:
1.67 www 378: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
379: $upass.=$chunk;
380: }
1.8 www 381:
1.1 albertel 382: # ---------------------------------------------------------------- Authenticate
1.119 raeburn 383:
1.90 raeburn 384: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.119 raeburn 385: my ($cancreate,$statustocreate) =
386: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
387: my $defaultauth;
388: if (ref($cancreate) eq 'ARRAY') {
389: if (grep(/^login$/,@{$cancreate})) {
390: $defaultauth = 1;
1.90 raeburn 391: }
392: }
1.105 raeburn 393: my $clientcancheckhost = 1;
1.90 raeburn 394: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 395: $form{'udom'},$defaultauth,
396: $clientcancheckhost);
1.1 albertel 397:
398: # --------------------------------------------------------------------- Failed?
399:
400: if ($authhost eq 'no_host') {
1.85 albertel 401: &failed($r,'Username and/or password could not be authenticated.',
402: \%form);
1.1 albertel 403: return OK;
1.90 raeburn 404: } elsif ($authhost eq 'no_account_on_host') {
1.119 raeburn 405: if ($defaultauth) {
1.105 raeburn 406: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 407: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
408: return OK;
409: }
1.90 raeburn 410: my $start_page =
1.121.2.1 raeburn 411: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
412: '',{'no_inline_link' => 1,});
1.93 raeburn 413: my $lonhost = $r->dir_config('lonHostID');
414: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
415: my $contacts =
416: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
417: $form{'udom'},$origmail);
418: my ($contact_email) = split(',',$contacts);
1.119 raeburn 419: my $output =
420: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
421: $domdesc,'',$lonhost,
422: $contact_email,$contact_name,
423: undef,$statustocreate);
1.90 raeburn 424: &Apache::loncommon::content_type($r,'text/html');
425: $r->send_http_header;
426: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 427: $r->print('<h3>'.&mt('Account creation').'</h3>'.
428: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
429: $output.&Apache::loncommon::end_page());
1.90 raeburn 430: return OK;
431: } else {
432: &failed($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);
433: return OK;
434: }
1.1 albertel 435: }
436:
1.59 www 437: if (($firsturl eq '') ||
438: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 439: $firsturl='/adm/roles';
1.7 www 440: }
1.121.2.6 raeburn 441:
442: my $hosthere;
443: if ($form{'iptoken'}) {
1.121.2.12! raeburn 444: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
! 445: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.121.2.6 raeburn 446: if (($sessiondata{'domain'} eq $form{'udom'}) &&
447: ($sessiondata{'username'} eq $form{'uname'})) {
448: $hosthere = 1;
449: }
450: }
451:
1.61 www 452: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 453: if ($form{'suname'}) {
1.61 www 454: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 455: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 456: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 457: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 458: eq 'no_host') {
1.85 albertel 459: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 460: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 461: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 462: # -------------------------------------------------------- actually switch users
1.85 albertel 463: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
464: ' logging in as '.$form{'suname'});
465: $form{'uname'}=$form{'suname'};
1.61 www 466: } else {
467: &Apache::lonnet::logthis('Attempted switch user to privileged user');
468: }
469: }
470: } else {
471: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
472: }
473: }
1.85 albertel 474:
1.121.2.6 raeburn 475: my ($is_balancer,$otherserver);
476:
477: unless ($hosthere) {
478: ($is_balancer,$otherserver) =
479: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
480: }
1.117 raeburn 481:
482: if ($is_balancer) {
1.115 raeburn 483: if (!$otherserver) {
1.116 raeburn 484: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 485: }
486: if ($otherserver) {
487: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
488: \%form);
1.121.2.8 raeburn 489: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
490: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
491: $switchto .= '&origurl='.$firsturl;
492: }
493: if ($form{'role'}) {
494: $switchto .= '&role='.$form{'role'};
495: }
496: if ($form{'symb'}) {
497: $switchto .= '&symb='.$form{'symb'};
498: }
499: $r->internal_redirect($switchto);
1.115 raeburn 500: } else {
501: $r->print(&noswitch());
502: }
1.110 raeburn 503: return OK;
1.81 albertel 504: } else {
1.115 raeburn 505: if (!&check_can_host($r,\%form,$authhost)) {
1.118 raeburn 506: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 507: if ($otherserver) {
508: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
509: \%form);
1.121.2.8 raeburn 510: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
511: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
512: $switchto .= '&origurl='.$firsturl;
513: }
514: if ($form{'role'}) {
515: $switchto .= '&role='.$form{'role'};
516: }
517: if ($form{'symb'}) {
518: $switchto .= '&symb='.$form{'symb'};
519: }
520: $r->internal_redirect($switchto);
1.115 raeburn 521: } else {
522: $r->print(&noswitch());
523: }
524: return OK;
525: }
526:
1.109 raeburn 527: # ------------------------------------------------------- Do the load balancing
528:
529: # ---------------------------------------------------------- Determine own load
530: my $loadlim = $r->dir_config('lonLoadLim');
531: my $loadavg;
532: {
533: my $loadfile=Apache::File->new('/proc/loadavg');
534: $loadavg=<$loadfile>;
535: }
536: $loadavg =~ s/\s.*//g;
537: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
538: my $userloadpercent=&Apache::lonnet::userload();
539:
540: # ---------------------------------------------------------- Are we overloaded?
541: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
542: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.115 raeburn 543: if (!$unloaded) {
1.118 raeburn 544: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 545: }
1.109 raeburn 546: if ($unloaded) {
547: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
548: undef,\%form);
549: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 550: return OK;
1.109 raeburn 551: }
552: }
553: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
554: \%form);
1.110 raeburn 555: return OK;
1.81 albertel 556: }
1.1 albertel 557: }
558:
1.105 raeburn 559: sub check_can_host {
560: my ($r,$form,$authhost,$domdesc) = @_;
561: return unless (ref($form) eq 'HASH');
562: my $canhost = 1;
1.106 raeburn 563: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 564: my $udom = $form->{'udom'};
1.108 raeburn 565: my @intdoms;
566: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
567: if (ref($internet_names) eq 'ARRAY') {
568: @intdoms = @{$internet_names};
569: }
1.106 raeburn 570: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
571: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
572: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
573: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
574: my $hostname = &Apache::lonnet::hostname($lonhost);
575: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
576: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
577: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 578: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
579: my $loncaparev;
580: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 581: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 582: } else {
1.106 raeburn 583: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 584: }
1.106 raeburn 585: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
586: $udomdefaults{'remotesessions'},
587: $defdomdefaults{'hostedsessions'});
1.105 raeburn 588: }
589: unless ($canhost) {
590: if ($authhost eq 'no_account_on_host') {
1.115 raeburn 591: my $checkloginvia = 1;
592: my ($login_host,$hostname) =
593: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.105 raeburn 594: &Apache::loncommon::content_type($r,'text/html');
595: $r->send_http_header;
596: if ($login_host ne '') {
597: my $protocol = $Apache::lonnet::protocol{$login_host};
598: $protocol = 'http' if ($protocol ne 'https');
599: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
600: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
601: '<h3>'.&mt('Account creation').'</h3>'.
602: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
603: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
604: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
605: &Apache::loncommon::end_page());
606: } else {
607: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
608: '<h3>'.&mt('Account creation unavailable').'</h3>'.
609: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
610: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
611: &Apache::loncommon::end_page());
612: }
613: } else {
614: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
615: $form);
1.107 raeburn 616: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 617: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
618: }
619: }
1.110 raeburn 620: return $canhost;
1.105 raeburn 621: }
622:
1.115 raeburn 623: sub noswitch {
624: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
625: '<h3>'.&mt('Session unavailable').'</h3>'.
626: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
627: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
628: &Apache::loncommon::end_page();
629: return $result;
630: }
631:
1.121.2.2 raeburn 632: sub loginhelpdisplay {
633: my ($authdomain) = @_;
634: my $login_help = 1;
635: my $lang = &Apache::lonlocal::current_language();
636: if ($login_help) {
637: my $dom = $authdomain;
638: if ($dom eq '') {
639: $dom = &Apache::lonnet::default_login_domain();
640: }
641: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
642: my $loginhelp_url;
643: if ($lang) {
644: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
645: if ($loginhelp_url ne '') {
646: return $loginhelp_url;
647: }
648: }
649: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
650: if ($loginhelp_url ne '') {
651: return $loginhelp_url;
652: } else {
653: return '/adm/loginproblems.html';
654: }
655: }
656: return;
657: }
658:
1.1 albertel 659: 1;
660: __END__
1.7 www 661:
662:
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