loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.122: download - view: text, annotated - select for diffs
Mon Aug 27 00:52:45 2012 UTC (11 years, 9 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Move &loginhelpdisplay() from lonlogin.pm to lonauth.pm to facilitate reuse.
- Log-in help page configuration moved from helpsettings to login section in
  Domain configuration interface.
- Add ability to upload different help files for the different supported languages.
- Link to log-in help page depends on user's browser language preferences.

1: # The LearningOnline Network 2: # User Authentication Module 3: # 4: # $Id: lonauth.pm,v 1.122 2012/08/27 00:52:45 raeburn Exp $ 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; 32: use LONCAPA; 33: use Apache::Constants qw(:common); 34: use CGI qw(:standard); 35: use DynaLoader; # for Crypt::DES version 36: use Crypt::DES; 37: use Apache::loncommon(); 38: use Apache::lonnet; 39: use Apache::lonmenu(); 40: use Apache::createaccount; 41: use Fcntl qw(:flock); 42: use Apache::lonlocal; 43: use Apache::File(); 44: use HTML::Entities; 45: 46: # ------------------------------------------------------------ Successful login 47: sub success { 48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, 49: $form) = @_; 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 $ENV{'REMOTE_ADDR'}"); 65: 66: # ------------------------------------------------- Check for critical messages 67: 68: my @what=&Apache::lonnet::dump('critical',$domain,$username); 69: if ($what[0]) { 70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { 71: $lowerurl='/adm/email?critical=display'; 72: } 73: } 74: 75: # ------------------------------------------------------------ Get cookie ready 76: $cookie="lonID=$cookie; path=/"; 77: # -------------------------------------------------------- Menu script and info 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'}; 85: my $update=$env{'user.update.time'}; 86: if (!$update) { 87: $update = $then; 88: } 89: if (exists($env{$envkey})) { 90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus); 91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where, 92: \$trolecode,\$tstatus,\$tstart,\$tend); 93: if ($tstatus eq 'is') { 94: $destination .= ($destination =~ /\?/) ? '&' : '?'; 95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&'); 96: $destination .= 'selectrole=1&'.$newrole.'=1'; 97: } 98: } 99: } 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(/___/,$destsymb); 106: unless ($desturl=~/^(adm|uploaded|editupload|public)/) { 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: } 118: if ($destination =~ m{^/adm/roles}) { 119: $destination .= ($destination =~ /\?/) ? '&' : '?'; 120: $destination .= 'source=login'; 121: } 122: 123: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";'); 124: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />'; 125: my $brcrum = [{'href' => '', 126: 'text' => 'Successful Login'},]; 127: my $start_page=&Apache::loncommon::start_page('Successful Login', 128: $header, 129: {'bread_crumbs' => $brcrum,}); 130: my $end_page =&Apache::loncommon::end_page(); 131: 132: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>'; 133: # ------------------------------------------------- Output for successful login 134: 135: &Apache::loncommon::content_type($r,'text/html'); 136: $r->header_out('Set-cookie' => $cookie); 137: $r->send_http_header; 138: 139: my %lt=&Apache::lonlocal::texthash( 140: 'wel' => 'Welcome', 141: 'pro' => 'Login problems?', 142: ); 143: my $loginhelp = &loginhelpdisplay($domain); 144: if ($loginhelp) { 145: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>'; 146: } 147: 148: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 149: $r->print(<<ENDSUCCESS); 150: $start_page 151: $windowinfo 152: <h1>$lt{'wel'}</h1> 153: $welcome 154: $loginhelp 155: $continuelink 156: $end_page 157: ENDSUCCESS 158: } 159: 160: # --------------------------------------------------------------- Failed login! 161: 162: sub failed { 163: my ($r,$message,$form) = @_; 164: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef); 165: my $retry = '/adm/login?username='.$form->{'uname'}. 166: '&domain='.$form->{'udom'}; 167: if (exists($form->{role})) { 168: $retry .= '&role='.$form->{role}; 169: } 170: if (exists($form->{symb})) { 171: $retry .= '&symb='.$form->{symb}; 172: } 173: my $end_page = &Apache::loncommon::end_page(); 174: &Apache::loncommon::content_type($r,'text/html'); 175: $r->send_http_header; 176: $r->print( 177: $start_page 178: .'<h1>'.&mt('Sorry ...').'</h1>' 179: .'<p class="LC_warning">'.&mt($message).'</p>' 180: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>') 181: .'</p>' 182: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>' 183: .$end_page 184: ); 185: } 186: 187: # ------------------------------------------------------------------ Rerouting! 188: 189: sub reroute { 190: my ($r) = @_; 191: &Apache::loncommon::content_type($r,'text/html'); 192: $r->send_http_header; 193: my $msg='<h1>'.&mt('Sorry ...').'</h1>' 194: .&mt('Please [_1]log in again[_2].'); 195: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg); 196: } 197: 198: # ---------------------------------------------------------------- Main handler 199: 200: sub handler { 201: my $r = shift; 202: my $londocroot = $r->dir_config('lonDocRoot'); 203: my $form; 204: # Are we re-routing? 205: if (-e "$londocroot/lon-status/reroute.txt") { 206: &reroute($r); 207: return OK; 208: } 209: 210: &Apache::lonlocal::get_language_handle($r); 211: 212: # -------------------------------- Prevent users from attempting to login twice 213: my $handle = &Apache::lonnet::check_for_valid_session($r); 214: if ($handle ne '') { 215: my $lonidsdir=$r->dir_config('lonIDsDir'); 216: if ($handle=~/^publicuser\_/) { 217: # For "public user" - remove it, we apparently really want to login 218: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 219: } else { 220: # Indeed, a valid token is found 221: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 222: &Apache::loncommon::content_type($r,'text/html'); 223: $r->send_http_header; 224: my $start_page = 225: &Apache::loncommon::start_page('Already logged in'); 226: my $end_page = 227: &Apache::loncommon::end_page(); 228: my $dest = '/adm/roles'; 229: if ($env{'form.firsturl'} ne '') { 230: $dest = $env{'form.firsturl'}; 231: } 232: $r->print( 233: $start_page 234: .'<p class="LC_warning>"'.&mt('You are already logged in!').'</p>' 235: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' 236: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') 237: .'</p>' 238: .$end_page 239: ); 240: return OK; 241: } 242: } 243: 244: # ---------------------------------------------------- No valid token, continue 245: 246: 247: my $buffer; 248: if ($r->header_in('Content-length') > 0) { 249: $r->read($buffer,$r->header_in('Content-length'),0); 250: } 251: my %form; 252: foreach my $pair (split(/&/,$buffer)) { 253: my ($name,$value) = split(/=/,$pair); 254: $value =~ tr/+/ /; 255: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; 256: $form{$name}=$value; 257: } 258: 259: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { 260: &failed($r,'Username, password and domain need to be specified.', 261: \%form); 262: return OK; 263: } 264: 265: # split user logging in and "su"-user 266: 267: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); 268: $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); 269: $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); 270: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); 271: 272: my $role = $r->dir_config('lonRole'); 273: my $domain = $r->dir_config('lonDefDomain'); 274: my $prodir = $r->dir_config('lonUsersDir'); 275: my $contact_name = &mt('LON-CAPA helpdesk'); 276: 277: # ---------------------------------------- Get the information from login token 278: 279: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, 280: $form{'serverid'}); 281: 282: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 283: ($tmpinfo eq 'no_such_host')) { 284: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); 285: return OK; 286: } else { 287: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, 288: $form{'serverid'}); 289: if ( $reply ne 'ok' ) { 290: &failed($r,'Session could not be opened.',\%form); 291: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); 292: return OK; 293: } 294: } 295: 296: if (!&Apache::lonnet::domain($form{'udom'})) { 297: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); 298: return OK; 299: } 300: 301: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo); 302: if ($rolestr) { 303: $rolestr = &unescape($rolestr); 304: } 305: if ($symbstr) { 306: $symbstr= &unescape($symbstr); 307: } 308: if ($rolestr =~ /^role=/) { 309: (undef,$form{'role'}) = split('=',$rolestr); 310: } 311: if ($symbstr =~ /^symb=/) { 312: (undef,$form{'symb'}) = split('=',$symbstr); 313: } 314: 315: my $keybin=pack("H16",$key); 316: 317: my $cipher; 318: if ($Crypt::DES::VERSION>=2.03) { 319: $cipher=new Crypt::DES $keybin; 320: } 321: else { 322: $cipher=new DES $keybin; 323: } 324: my $upass=''; 325: for (my $i=0;$i<=2;$i++) { 326: my $chunk= 327: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); 328: 329: $chunk.= 330: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); 331: 332: $chunk=substr($chunk,1,ord(substr($chunk,0,1))); 333: $upass.=$chunk; 334: } 335: 336: # ---------------------------------------------------------------- Authenticate 337: 338: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); 339: my ($cancreate,$statustocreate) = 340: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'}); 341: my $defaultauth; 342: if (ref($cancreate) eq 'ARRAY') { 343: if (grep(/^login$/,@{$cancreate})) { 344: $defaultauth = 1; 345: } 346: } 347: my $clientcancheckhost = 1; 348: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, 349: $form{'udom'},$defaultauth, 350: $clientcancheckhost); 351: 352: # --------------------------------------------------------------------- Failed? 353: 354: if ($authhost eq 'no_host') { 355: &failed($r,'Username and/or password could not be authenticated.', 356: \%form); 357: return OK; 358: } elsif ($authhost eq 'no_account_on_host') { 359: if ($defaultauth) { 360: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); 361: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { 362: return OK; 363: } 364: my $start_page = 365: &Apache::loncommon::start_page('Create a user account in LON-CAPA'); 366: my $lonhost = $r->dir_config('lonHostID'); 367: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 368: my $contacts = 369: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', 370: $form{'udom'},$origmail); 371: my ($contact_email) = split(',',$contacts); 372: my $output = 373: &Apache::createaccount::username_check($form{'uname'},$form{'udom'}, 374: $domdesc,'',$lonhost, 375: $contact_email,$contact_name, 376: undef,$statustocreate); 377: &Apache::loncommon::content_type($r,'text/html'); 378: $r->send_http_header; 379: &Apache::createaccount::print_header($r,$start_page); 380: $r->print('<h3>'.&mt('Account creation').'</h3>'. 381: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. 382: $output.&Apache::loncommon::end_page()); 383: return OK; 384: } else { 385: &failed($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); 386: return OK; 387: } 388: } 389: 390: if (($firsturl eq '') || 391: ($firsturl=~/^\/adm\/(logout|remote)/)) { 392: $firsturl='/adm/roles'; 393: } 394: # --------------------------------- Are we attempting to login as somebody else? 395: if ($form{'suname'}) { 396: # ------------ see if the original user has enough privileges to pull this stunt 397: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { 398: # ---------------------------------------------------- see if the su-user exists 399: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) 400: eq 'no_host') { 401: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); 402: # ------------------------------ see if the su-user is not too highly privileged 403: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { 404: # -------------------------------------------------------- actually switch users 405: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. 406: ' logging in as '.$form{'suname'}); 407: $form{'uname'}=$form{'suname'}; 408: } else { 409: &Apache::lonnet::logthis('Attempted switch user to privileged user'); 410: } 411: } 412: } else { 413: &Apache::lonnet::logthis('Non-privileged user attempting switch user'); 414: } 415: } 416: 417: my ($is_balancer,$otherserver) = 418: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); 419: 420: if ($is_balancer) { 421: if (!$otherserver) { 422: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); 423: } 424: if ($otherserver) { 425: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 426: \%form); 427: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); 428: } else { 429: $r->print(&noswitch()); 430: } 431: return OK; 432: } else { 433: if (!&check_can_host($r,\%form,$authhost)) { 434: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); 435: if ($otherserver) { 436: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 437: \%form); 438: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); 439: } else { 440: $r->print(&noswitch()); 441: } 442: return OK; 443: } 444: 445: # ------------------------------------------------------- Do the load balancing 446: 447: # ---------------------------------------------------------- Determine own load 448: my $loadlim = $r->dir_config('lonLoadLim'); 449: my $loadavg; 450: { 451: my $loadfile=Apache::File->new('/proc/loadavg'); 452: $loadavg=<$loadfile>; 453: } 454: $loadavg =~ s/\s.*//g; 455: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 456: my $userloadpercent=&Apache::lonnet::userload(); 457: 458: # ---------------------------------------------------------- Are we overloaded? 459: if ((($userloadpercent>100.0)||($loadpercent>100.0))) { 460: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); 461: if (!$unloaded) { 462: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); 463: } 464: if ($unloaded) { 465: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', 466: undef,\%form); 467: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); 468: return OK; 469: } 470: } 471: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, 472: \%form); 473: return OK; 474: } 475: } 476: 477: sub check_can_host { 478: my ($r,$form,$authhost,$domdesc) = @_; 479: return unless (ref($form) eq 'HASH'); 480: my $canhost = 1; 481: my $lonhost = $r->dir_config('lonHostID'); 482: my $udom = $form->{'udom'}; 483: my @intdoms; 484: my $internet_names = &Apache::lonnet::get_internet_names($lonhost); 485: if (ref($internet_names) eq 'ARRAY') { 486: @intdoms = @{$internet_names}; 487: } 488: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 489: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 490: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 491: my $machine_dom = &Apache::lonnet::host_domain($lonhost); 492: my $hostname = &Apache::lonnet::hostname($lonhost); 493: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); 494: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); 495: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); 496: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); 497: my $loncaparev; 498: if ($authhost eq 'no_account_on_host') { 499: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); 500: } else { 501: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); 502: } 503: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, 504: $udomdefaults{'remotesessions'}, 505: $defdomdefaults{'hostedsessions'}); 506: } 507: unless ($canhost) { 508: if ($authhost eq 'no_account_on_host') { 509: my $checkloginvia = 1; 510: my ($login_host,$hostname) = 511: &Apache::lonnet::choose_server($udom,$checkloginvia); 512: &Apache::loncommon::content_type($r,'text/html'); 513: $r->send_http_header; 514: if ($login_host ne '') { 515: my $protocol = $Apache::lonnet::protocol{$login_host}; 516: $protocol = 'http' if ($protocol ne 'https'); 517: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; 518: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). 519: '<h3>'.&mt('Account creation').'</h3>'. 520: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 521: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. 522: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). 523: &Apache::loncommon::end_page()); 524: } else { 525: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 526: '<h3>'.&mt('Account creation unavailable').'</h3>'. 527: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 528: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. 529: &Apache::loncommon::end_page()); 530: } 531: } else { 532: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, 533: $form); 534: my ($otherserver) = &Apache::lonnet::choose_server($udom); 535: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); 536: } 537: } 538: return $canhost; 539: } 540: 541: sub noswitch { 542: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 543: '<h3>'.&mt('Session unavailable').'</h3>'. 544: &mt('This LON-CAPA server is unable to host your session.').'<br />'. 545: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'. 546: &Apache::loncommon::end_page(); 547: return $result; 548: } 549: 550: sub loginhelpdisplay { 551: my ($authdomain) = @_; 552: my $login_help = 1; 553: my $lang = &Apache::lonlocal::current_language(); 554: if ($login_help) { 555: my $dom = $authdomain; 556: if ($dom eq '') { 557: $dom = &Apache::lonnet::default_login_domain(); 558: } 559: my %domconfhash = &Apache::loncommon::get_domainconf($dom); 560: my $loginhelp_url; 561: if ($lang) { 562: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang}; 563: if ($loginhelp_url ne '') { 564: return $loginhelp_url; 565: } 566: } 567: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'}; 568: if ($loginhelp_url ne '') { 569: return $loginhelp_url; 570: } else { 571: return '/adm/loginproblems.html'; 572: } 573: } 574: return; 575: } 576: 577: 1; 578: __END__ 579: 580: