Annotation of loncom/auth/lonauth.pm, revision 1.121.2.7
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.121.2.7! raeburn 4: # $Id: lonauth.pm,v 1.121.2.6 2013/09/29 19:31:03 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,'"<>&');
111: $destination .= '&destinationurl='.$desturl.
112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
115: $destination .= '&destinationurl='.$destsymb;
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: $end_page
1.1 albertel 167: ENDSUCCESS
168: }
169:
170: # --------------------------------------------------------------- Failed login!
171:
172: sub failed {
1.85 albertel 173: my ($r,$message,$form) = @_;
1.121.2.7! raeburn 174: (undef,undef,undef,my $clientmathml,my $clientunicode) =
! 175: &Apache::loncommon::decode_user_agent();
! 176: my $args = {};
! 177: if ($clientunicode && !$clientmathml) {
! 178: $args = {'browser.unicode' => 1};
! 179: }
! 180:
! 181: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
! 182: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
! 183: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
! 184: if (&Apache::lonnet::domain($udom,'description') eq '') {
! 185: undef($udom);
! 186: }
! 187: my $retry = '/adm/login';
! 188: if ($uname eq $form->{'uname'}) {
! 189: $retry .= '?username='.$uname;
! 190: }
! 191: if ($udom) {
! 192: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
! 193: }
1.100 raeburn 194: if (exists($form->{role})) {
1.121.2.7! raeburn 195: my $role = &Apache::loncommon::cleanup_html($form->{role});
! 196: if ($role ne '') {
! 197: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
! 198: }
1.100 raeburn 199: }
200: if (exists($form->{symb})) {
1.121.2.7! raeburn 201: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
! 202: if ($symb ne '') {
! 203: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
! 204: }
1.100 raeburn 205: }
1.121.2.7! raeburn 206: my $end_page = &Apache::loncommon::end_page();
1.74 albertel 207: &Apache::loncommon::content_type($r,'text/html');
208: $r->send_http_header;
1.121.2.7! raeburn 209: my $loginhelp = &loginhelpdisplay($udom);
1.121.2.2 raeburn 210: if ($loginhelp) {
211: $loginhelp = '<p><a href="'.$loginhelp.'">'.&mt('Login problems?').'</a></p>';
212: }
213:
1.92 bisitz 214: $r->print(
215: $start_page
216: .'<h1>'.&mt('Sorry ...').'</h1>'
1.95 bisitz 217: .'<p class="LC_warning">'.&mt($message).'</p>'
1.100 raeburn 218: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92 bisitz 219: .'</p>'
1.121.2.2 raeburn 220: .$loginhelp
1.92 bisitz 221: .$end_page
222: );
223: }
1.60 www 224:
1.55 www 225: # ------------------------------------------------------------------ Rerouting!
226:
227: sub reroute {
1.74 albertel 228: my ($r) = @_;
229: &Apache::loncommon::content_type($r,'text/html');
230: $r->send_http_header;
1.121.2.5 raeburn 231: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
1.92 bisitz 232: .&mt('Please [_1]log in again[_2].');
1.121.2.5 raeburn 233: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
1.55 www 234: }
235:
1.1 albertel 236: # ---------------------------------------------------------------- Main handler
237:
238: sub handler {
239: my $r = shift;
1.120 raeburn 240: my $londocroot = $r->dir_config('lonDocRoot');
1.85 albertel 241: my $form;
1.55 www 242: # Are we re-routing?
1.120 raeburn 243: if (-e "$londocroot/lon-status/reroute.txt") {
1.55 www 244: &reroute($r);
245: return OK;
246: }
1.56 www 247:
1.57 www 248: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 249:
1.59 www 250: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 251: my $handle = &Apache::lonnet::check_for_valid_session($r);
252: if ($handle ne '') {
1.103 raeburn 253: my $lonidsdir=$r->dir_config('lonIDsDir');
254: if ($handle=~/^publicuser\_/) {
255: # For "public user" - remove it, we apparently really want to login
256: unlink($r->dir_config('lonIDsDir')."/$handle.id");
257: } else {
1.59 www 258: # Indeed, a valid token is found
1.103 raeburn 259: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
260: &Apache::loncommon::content_type($r,'text/html');
261: $r->send_http_header;
262: my $start_page =
263: &Apache::loncommon::start_page('Already logged in');
264: my $end_page =
265: &Apache::loncommon::end_page();
1.105 raeburn 266: my $dest = '/adm/roles';
267: if ($env{'form.firsturl'} ne '') {
268: $dest = $env{'form.firsturl'};
269: }
1.103 raeburn 270: $r->print(
271: $start_page
1.121.2.4 raeburn 272: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
1.103 raeburn 273: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.105 raeburn 274: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
1.103 raeburn 275: .'</p>'
276: .$end_page
277: );
278: return OK;
279: }
1.59 www 280: }
281:
282: # ---------------------------------------------------- No valid token, continue
283:
284:
1.1 albertel 285: my $buffer;
1.84 albertel 286: if ($r->header_in('Content-length') > 0) {
287: $r->read($buffer,$r->header_in('Content-length'),0);
288: }
1.85 albertel 289: my %form;
290: foreach my $pair (split(/&/,$buffer)) {
291: my ($name,$value) = split(/=/,$pair);
1.7 www 292: $value =~ tr/+/ /;
293: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 294: $form{$name}=$value;
1.121.2.6 raeburn 295: }
1.1 albertel 296:
1.85 albertel 297: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
298: &failed($r,'Username, password and domain need to be specified.',
299: \%form);
1.1 albertel 300: return OK;
301: }
1.61 www 302:
303: # split user logging in and "su"-user
304:
1.85 albertel 305: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 306: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
307: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
308: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 309:
310: my $role = $r->dir_config('lonRole');
311: my $domain = $r->dir_config('lonDefDomain');
312: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 313: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 314:
1.8 www 315: # ---------------------------------------- Get the information from login token
316:
1.85 albertel 317: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
318: $form{'serverid'});
1.121.2.7! raeburn 319:
1.121.2.6 raeburn 320: my %sessiondata;
321: if ($form{'iptoken'}) {
322: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
323: my $delete = &Apache::lonnet::tmpdel($form{'token'});
324: }
1.8 www 325:
1.114 raeburn 326: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
327: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 328: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 329: return OK;
1.44 www 330: } else {
1.85 albertel 331: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
332: $form{'serverid'});
1.77 albertel 333: if ( $reply ne 'ok' ) {
1.85 albertel 334: &failed($r,'Session could not be opened.',\%form);
335: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 336: return OK;
1.44 www 337: }
1.8 www 338: }
1.100 raeburn 339:
1.93 raeburn 340: if (!&Apache::lonnet::domain($form{'udom'})) {
341: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
342: return OK;
343: }
1.100 raeburn 344:
345: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
346: if ($rolestr) {
347: $rolestr = &unescape($rolestr);
348: }
349: if ($symbstr) {
350: $symbstr= &unescape($symbstr);
351: }
352: if ($rolestr =~ /^role=/) {
353: (undef,$form{'role'}) = split('=',$rolestr);
354: }
355: if ($symbstr =~ /^symb=/) {
356: (undef,$form{'symb'}) = split('=',$symbstr);
357: }
1.8 www 358:
359: my $keybin=pack("H16",$key);
360:
1.26 harris41 361: my $cipher;
362: if ($Crypt::DES::VERSION>=2.03) {
363: $cipher=new Crypt::DES $keybin;
364: }
365: else {
366: $cipher=new DES $keybin;
367: }
1.67 www 368: my $upass='';
369: for (my $i=0;$i<=2;$i++) {
370: my $chunk=
1.85 albertel 371: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 372:
1.67 www 373: $chunk.=
1.85 albertel 374: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 375:
1.67 www 376: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
377: $upass.=$chunk;
378: }
1.8 www 379:
1.1 albertel 380: # ---------------------------------------------------------------- Authenticate
1.119 raeburn 381:
1.90 raeburn 382: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.119 raeburn 383: my ($cancreate,$statustocreate) =
384: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
385: my $defaultauth;
386: if (ref($cancreate) eq 'ARRAY') {
387: if (grep(/^login$/,@{$cancreate})) {
388: $defaultauth = 1;
1.90 raeburn 389: }
390: }
1.105 raeburn 391: my $clientcancheckhost = 1;
1.90 raeburn 392: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 393: $form{'udom'},$defaultauth,
394: $clientcancheckhost);
1.1 albertel 395:
396: # --------------------------------------------------------------------- Failed?
397:
398: if ($authhost eq 'no_host') {
1.85 albertel 399: &failed($r,'Username and/or password could not be authenticated.',
400: \%form);
1.1 albertel 401: return OK;
1.90 raeburn 402: } elsif ($authhost eq 'no_account_on_host') {
1.119 raeburn 403: if ($defaultauth) {
1.105 raeburn 404: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 405: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
406: return OK;
407: }
1.90 raeburn 408: my $start_page =
1.121.2.1 raeburn 409: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
410: '',{'no_inline_link' => 1,});
1.93 raeburn 411: my $lonhost = $r->dir_config('lonHostID');
412: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
413: my $contacts =
414: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
415: $form{'udom'},$origmail);
416: my ($contact_email) = split(',',$contacts);
1.119 raeburn 417: my $output =
418: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
419: $domdesc,'',$lonhost,
420: $contact_email,$contact_name,
421: undef,$statustocreate);
1.90 raeburn 422: &Apache::loncommon::content_type($r,'text/html');
423: $r->send_http_header;
424: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 425: $r->print('<h3>'.&mt('Account creation').'</h3>'.
426: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
427: $output.&Apache::loncommon::end_page());
1.90 raeburn 428: return OK;
429: } else {
430: &failed($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);
431: return OK;
432: }
1.1 albertel 433: }
434:
1.59 www 435: if (($firsturl eq '') ||
436: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 437: $firsturl='/adm/roles';
1.7 www 438: }
1.121.2.6 raeburn 439:
440: my $hosthere;
441: if ($form{'iptoken'}) {
442: if (($sessiondata{'domain'} eq $form{'udom'}) &&
443: ($sessiondata{'username'} eq $form{'uname'})) {
444: $hosthere = 1;
445: }
446: }
447:
1.61 www 448: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 449: if ($form{'suname'}) {
1.61 www 450: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 451: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 452: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 453: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 454: eq 'no_host') {
1.85 albertel 455: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 456: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 457: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 458: # -------------------------------------------------------- actually switch users
1.85 albertel 459: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
460: ' logging in as '.$form{'suname'});
461: $form{'uname'}=$form{'suname'};
1.61 www 462: } else {
463: &Apache::lonnet::logthis('Attempted switch user to privileged user');
464: }
465: }
466: } else {
467: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
468: }
469: }
1.85 albertel 470:
1.121.2.6 raeburn 471: my ($is_balancer,$otherserver);
472:
473: unless ($hosthere) {
474: ($is_balancer,$otherserver) =
475: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
476: }
1.117 raeburn 477:
478: if ($is_balancer) {
1.115 raeburn 479: if (!$otherserver) {
1.116 raeburn 480: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 481: }
482: if ($otherserver) {
483: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
484: \%form);
485: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
486: } else {
487: $r->print(&noswitch());
488: }
1.110 raeburn 489: return OK;
1.81 albertel 490: } else {
1.115 raeburn 491: if (!&check_can_host($r,\%form,$authhost)) {
1.118 raeburn 492: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 493: if ($otherserver) {
494: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
495: \%form);
496: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
497: } else {
498: $r->print(&noswitch());
499: }
500: return OK;
501: }
502:
1.109 raeburn 503: # ------------------------------------------------------- Do the load balancing
504:
505: # ---------------------------------------------------------- Determine own load
506: my $loadlim = $r->dir_config('lonLoadLim');
507: my $loadavg;
508: {
509: my $loadfile=Apache::File->new('/proc/loadavg');
510: $loadavg=<$loadfile>;
511: }
512: $loadavg =~ s/\s.*//g;
513: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
514: my $userloadpercent=&Apache::lonnet::userload();
515:
516: # ---------------------------------------------------------- Are we overloaded?
517: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
518: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.115 raeburn 519: if (!$unloaded) {
1.118 raeburn 520: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 521: }
1.109 raeburn 522: if ($unloaded) {
523: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
524: undef,\%form);
525: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 526: return OK;
1.109 raeburn 527: }
528: }
529: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
530: \%form);
1.110 raeburn 531: return OK;
1.81 albertel 532: }
1.1 albertel 533: }
534:
1.105 raeburn 535: sub check_can_host {
536: my ($r,$form,$authhost,$domdesc) = @_;
537: return unless (ref($form) eq 'HASH');
538: my $canhost = 1;
1.106 raeburn 539: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 540: my $udom = $form->{'udom'};
1.108 raeburn 541: my @intdoms;
542: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
543: if (ref($internet_names) eq 'ARRAY') {
544: @intdoms = @{$internet_names};
545: }
1.106 raeburn 546: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
547: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
548: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
549: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
550: my $hostname = &Apache::lonnet::hostname($lonhost);
551: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
552: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
553: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 554: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
555: my $loncaparev;
556: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 557: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 558: } else {
1.106 raeburn 559: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 560: }
1.106 raeburn 561: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
562: $udomdefaults{'remotesessions'},
563: $defdomdefaults{'hostedsessions'});
1.105 raeburn 564: }
565: unless ($canhost) {
566: if ($authhost eq 'no_account_on_host') {
1.115 raeburn 567: my $checkloginvia = 1;
568: my ($login_host,$hostname) =
569: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.105 raeburn 570: &Apache::loncommon::content_type($r,'text/html');
571: $r->send_http_header;
572: if ($login_host ne '') {
573: my $protocol = $Apache::lonnet::protocol{$login_host};
574: $protocol = 'http' if ($protocol ne 'https');
575: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
576: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
577: '<h3>'.&mt('Account creation').'</h3>'.
578: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
579: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
580: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
581: &Apache::loncommon::end_page());
582: } else {
583: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
584: '<h3>'.&mt('Account creation unavailable').'</h3>'.
585: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
586: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
587: &Apache::loncommon::end_page());
588: }
589: } else {
590: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
591: $form);
1.107 raeburn 592: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 593: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
594: }
595: }
1.110 raeburn 596: return $canhost;
1.105 raeburn 597: }
598:
1.115 raeburn 599: sub noswitch {
600: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
601: '<h3>'.&mt('Session unavailable').'</h3>'.
602: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
603: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
604: &Apache::loncommon::end_page();
605: return $result;
606: }
607:
1.121.2.2 raeburn 608: sub loginhelpdisplay {
609: my ($authdomain) = @_;
610: my $login_help = 1;
611: my $lang = &Apache::lonlocal::current_language();
612: if ($login_help) {
613: my $dom = $authdomain;
614: if ($dom eq '') {
615: $dom = &Apache::lonnet::default_login_domain();
616: }
617: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
618: my $loginhelp_url;
619: if ($lang) {
620: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
621: if ($loginhelp_url ne '') {
622: return $loginhelp_url;
623: }
624: }
625: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
626: if ($loginhelp_url ne '') {
627: return $loginhelp_url;
628: } else {
629: return '/adm/loginproblems.html';
630: }
631: }
632: return;
633: }
634:
1.1 albertel 635: 1;
636: __END__
1.7 www 637:
638:
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