loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.138: download - view: text, annotated - select for diffs
Fri May 21 15:54:34 2010 UTC (14 years ago) by bisitz
Branches: MAIN
CVS tags: HEAD

Bug 6271, Bug 5577:
Get rid of user authentication image on login page (always use text version)
including all corresponding configuration settings.
Although the user interface is cleaned up and functional, the internal domain configuration cleanup could be improved.

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.138 2010/05/21 15:54:34 bisitz 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::lonlogin; 30: 31: use strict; 32: use Apache::Constants qw(:common); 33: use Apache::File (); 34: use Apache::lonnet; 35: use Apache::loncommon(); 36: use Apache::lonauth(); 37: use Apache::lonlocal; 38: use Apache::migrateuser(); 39: use lib '/home/httpd/lib/perl/'; 40: use LONCAPA; 41: 42: sub handler { 43: my $r = shift; 44: 45: &Apache::loncommon::get_unprocessed_cgi 46: (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'}, 47: $ENV{'REDIRECT_QUERY_STRING'}), 48: ['interface','username','domain','firsturl','localpath','localres', 49: 'token','role','symb']); 50: if (!defined($env{'form.firsturl'})) { 51: &Apache::lonacc::get_posted_cgi($r,['firsturl']); 52: } 53: 54: # -- check if they are a migrating user 55: if (defined($env{'form.token'})) { 56: return &Apache::migrateuser::handler($r); 57: } 58: 59: &Apache::loncommon::no_cache($r); 60: &Apache::lonlocal::get_language_handle($r); 61: &Apache::loncommon::content_type($r,'text/html'); 62: $r->send_http_header; 63: return OK if $r->header_only; 64: 65: 66: # Are we re-routing? 67: if (-e '/home/httpd/html/lon-status/reroute.txt') { 68: &Apache::lonauth::reroute($r); 69: return OK; 70: } 71: 72: 73: # -------------------------------- Prevent users from attempting to login twice 74: my $handle = &Apache::lonnet::check_for_valid_session($r); 75: if ($handle ne '') { 76: my $lonidsdir=$r->dir_config('lonIDsDir'); 77: if ($handle=~/^publicuser\_/) { 78: # For "public user" - remove it, we apparently really want to login 79: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 80: } else { 81: # Indeed, a valid token is found 82: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 83: my $start_page = 84: &Apache::loncommon::start_page('Already logged in'); 85: my $end_page = 86: &Apache::loncommon::end_page(); 87: my $dest = '/adm/roles'; 88: if ($env{'form.firsturl'} ne '') { 89: $dest = $env{'form.firsturl'}; 90: } 91: $r->print( 92: $start_page 93: .'<h1>'.&mt('You are already logged in!').'</h1>' 94: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].', 95: '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>' 96: .$end_page 97: ); 98: return OK; 99: } 100: } 101: 102: # ---------------------------------------------------- No valid token, continue 103: 104: # ---------------------------- Not possible to really login to domain "public" 105: if ($env{'form.domain'} eq 'public') { 106: $env{'form.domain'}=''; 107: $env{'form.username'}=''; 108: } 109: # ----------------------------------------------------------- Process Interface 110: $env{'form.interface'}=~s/\W//g; 111: 112: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 113: 114: my $iconpath= 115: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL')); 116: 117: my $lonhost = $r->dir_config('lonHostID'); 118: my $domain = &Apache::lonnet::default_login_domain(); 119: if ($lonhost ne '') { 120: my $redirect = &check_loginvia($domain,$lonhost); 121: if ($redirect) { 122: $r->print($redirect); 123: return OK; 124: } 125: } 126: 127: if (($env{'form.domain'}) && 128: (&Apache::lonnet::domain($env{'form.domain'},'description'))) { 129: $domain=$env{'form.domain'}; 130: } 131: my $role = $r->dir_config('lonRole'); 132: my $loadlim = $r->dir_config('lonLoadLim'); 133: my $servadm = $r->dir_config('lonAdmEMail'); 134: my $tabdir = $r->dir_config('lonTabDir'); 135: my $include = $r->dir_config('lonIncludes'); 136: my $expire = $r->dir_config('lonExpire'); 137: my $version = $r->dir_config('lonVersion'); 138: my $host_name = &Apache::lonnet::hostname($lonhost); 139: 140: # --------------------------------------------- Default values for login fields 141: 142: my $authusername=($env{'form.username'}?$env{'form.username'}:''); 143: my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain); 144: 145: # ---------------------------------------------------------- Determine own load 146: my $loadavg; 147: { 148: my $loadfile=Apache::File->new('/proc/loadavg'); 149: $loadavg=<$loadfile>; 150: } 151: $loadavg =~ s/\s.*//g; 152: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 153: my $userloadpercent=&Apache::lonnet::userload(); 154: 155: # ------------------------------------------------------- Do the load balancing 156: my $otherserver= &Apache::lonnet::absolute_url($host_name); 157: my $firsturl= 158: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'}); 159: # ---------------------------------------------------------- Are we overloaded? 160: if ((($userloadpercent>100.0)||($loadpercent>100.0))) { 161: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 162: if ($unloaded) { $otherserver=$unloaded; } 163: } 164: 165: # ----------------------------------------------------------- Get announcements 166: my $announcements=&Apache::lonnet::getannounce(); 167: # -------------------------------------------------------- Set login parameters 168: 169: my @hexstr=('0','1','2','3','4','5','6','7', 170: '8','9','a','b','c','d','e','f'); 171: my $lkey=''; 172: for (0..7) { 173: $lkey.=$hexstr[rand(15)]; 174: } 175: 176: my $ukey=''; 177: for (0..7) { 178: $ukey.=$hexstr[rand(15)]; 179: } 180: 181: my $lextkey=hex($lkey); 182: if ($lextkey>2147483647) { $lextkey-=4294967296; } 183: 184: my $uextkey=hex($ukey); 185: if ($uextkey>2147483647) { $uextkey-=4294967296; } 186: 187: # -------------------------------------------------------- Store away log token 188: my $tokenextras; 189: if ($env{'form.role'}) { 190: $tokenextras = '&role='.&escape($env{'form.role'}); 191: } 192: if ($env{'form.symb'}) { 193: if (!$tokenextras) { 194: $tokenextras = '&'; 195: } 196: $tokenextras .= '&symb='.&escape($env{'form.symb'}); 197: } 198: my $logtoken=Apache::lonnet::reply( 199: 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras, 200: $lonhost); 201: 202: # ------------------- If we cannot talk to ourselves, we are in serious trouble 203: 204: if ($logtoken eq 'con_lost') { 205: my $spares=''; 206: my $last; 207: foreach my $hostid (sort 208: { 209: &Apache::lonnet::hostname($a) cmp 210: &Apache::lonnet::hostname($b); 211: } 212: keys(%Apache::lonnet::spareid)) { 213: next if ($hostid eq $lonhost); 214: my $hostname = &Apache::lonnet::hostname($hostid); 215: next if ($last eq $hostname); 216: $spares.='<br /><font size="+1"><a href="http://'. 217: $hostname. 218: '/adm/login?domain='.$authdomain.'">'. 219: $hostname.'</a>'. 220: ' '.&mt('(preferred)').'</font>'.$/; 221: $last=$hostname; 222: } 223: $spares.= '<br />'; 224: my %all_hostnames = &Apache::lonnet::all_hostnames(); 225: foreach my $hostid (sort 226: { 227: &Apache::lonnet::hostname($a) cmp 228: &Apache::lonnet::hostname($b); 229: } 230: keys(%all_hostnames)) { 231: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); 232: my $hostname = &Apache::lonnet::hostname($hostid); 233: next if ($last eq $hostname); 234: $spares.='<br /><a href="http://'. 235: $hostname. 236: '/adm/login?domain='.$authdomain.'">'. 237: $hostname.'</a>'; 238: $last=$hostname; 239: } 240: $r->print( 241: '<html>' 242: .'<head><title>' 243: .&mt('The LearningOnline Network with CAPA') 244: .'</title></head>' 245: .'<body bgcolor="#FFFFFF">' 246: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>' 247: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />' 248: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>' 249: .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>' 250: .$spares 251: .'</body>' 252: .'</html>' 253: ); 254: return OK; 255: } 256: 257: # ----------------------------------------------- Apparently we are in business 258: $servadm=~s/\,/\<br \/\>/g; 259: 260: # ----------------------------------------------------------- Front page design 261: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain); 262: my $font=&Apache::loncommon::designparm('login.font',$domain); 263: my $link=&Apache::loncommon::designparm('login.link',$domain); 264: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain); 265: my $alink=&Apache::loncommon::designparm('login.alink',$domain); 266: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain); 267: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain); 268: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain); 269: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain); 270: my $logo=&Apache::loncommon::designparm('login.logo',$domain); 271: my $img=&Apache::loncommon::designparm('login.img',$domain); 272: my $domainlogo='<div>'.&Apache::loncommon::domainlogo($domain).'</div>'; 273: my $showbanner = 1; 274: my $showmainlogo = 1; 275: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) { 276: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain); 277: } 278: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) { 279: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain); 280: } 281: my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain); 282: my $showcoursecat = 283: &Apache::loncommon::designparm('login.coursecatalog',$domain); 284: my $shownewuserlink = 285: &Apache::loncommon::designparm('login.newuser',$domain); 286: my $now=time; 287: my $js = (<<ENDSCRIPT); 288: 289: <script type="text/javascript" language="JavaScript"> 290: // <![CDATA[ 291: function send() 292: { 293: this.document.server.elements.uname.value 294: =this.document.client.elements.uname.value; 295: 296: this.document.server.elements.udom.value 297: =this.document.client.elements.udom.value; 298: 299: uextkey=this.document.client.elements.uextkey.value; 300: lextkey=this.document.client.elements.lextkey.value; 301: initkeys(); 302: 303: this.document.server.elements.upass0.value 304: =crypted(this.document.client.elements.upass$now.value.substr(0,15)); 305: this.document.server.elements.upass1.value 306: =crypted(this.document.client.elements.upass$now.value.substr(15,15)); 307: this.document.server.elements.upass2.value 308: =crypted(this.document.client.elements.upass$now.value.substr(30,15)); 309: 310: this.document.client.elements.uname.value=''; 311: this.document.client.elements.upass$now.value=''; 312: 313: this.document.server.submit(); 314: return false; 315: } 316: // ]]> 317: </script> 318: 319: ENDSCRIPT 320: 321: # --------------------------------------------------- Print login screen header 322: 323: my %add_entries = ( 324: bgcolor => "$mainbg", 325: text => "$font", 326: link => "$link", 327: vlink => "$vlink", 328: alink => "$alink",); 329: 330: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js, 331: { 'redirect' => [$expire,'/adm/roles'], 332: 'add_entries' => \%add_entries, 333: 'only_body' => 1,})); 334: 335: # ----------------------------------------------------------------------- Texts 336: 337: my %lt=&Apache::lonlocal::texthash( 338: 'un' => 'Username', 339: 'pw' => 'Password', 340: 'dom' => 'Domain', 341: 'perc' => 'percent', 342: 'load' => 'Server Load', 343: 'userload' => 'User Load', 344: 'catalog' => 'Course/Community Catalog', 345: 'log' => 'Log in', 346: 'help' => 'Log-in Help', 347: 'serv' => 'Server', 348: 'servadm' => 'Server Administration', 349: 'helpdesk' => 'Contact Helpdesk', 350: 'forgotpw' => 'Forgot password?', 351: 'newuser' => 'New User?', 352: ); 353: # -------------------------------------------------- Change password field name 354: 355: my $forgotpw = &forgotpwdisplay(%lt); 356: $forgotpw .= '<br />' if $forgotpw; 357: my $loginhelp = &loginhelpdisplay($authdomain,%lt); 358: $loginhelp .= '<br />' if $loginhelp; 359: 360: # ---------------------------------------------------- Serve out DES JavaScript 361: { 362: my $jsh=Apache::File->new($include."/londes.js"); 363: $r->print(<$jsh>); 364: } 365: # ---------------------------------------------------------- Serve rest of page 366: 367: $r->print( 368: '<div class="LC_Box"' 369: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">' 370: ); 371: 372: # 373: # If the loadbalancing yielded just http:// because perhaps there's no loadbalancing? 374: # then just us a relative link to authenticate: 375: # 376: 377: $r->print(<<ENDSERVERFORM); 378: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 379: <input type="hidden" name="logtoken" value="$logtoken" /> 380: <input type="hidden" name="serverid" value="$lonhost" /> 381: <input type="hidden" name="uname" value="" /> 382: <input type="hidden" name="upass0" value="" /> 383: <input type="hidden" name="upass1" value="" /> 384: <input type="hidden" name="upass2" value="" /> 385: <input type="hidden" name="udom" value="" /> 386: <input type="hidden" name="localpath" value="$env{'form.localpath'}" /> 387: <input type="hidden" name="localres" value="$env{'form.localres'}" /> 388: </form> 389: ENDSERVERFORM 390: my $coursecatalog; 391: if (($showcoursecat eq '') || ($showcoursecat)) { 392: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />'; 393: } 394: my $newuserlink; 395: if ($shownewuserlink) { 396: $newuserlink = &newuser_link($lt{'newuser'}).'<br />'; 397: } 398: my $logintitle = 399: '<h2 class="LC_hcell"' 400: .' style="background:'.$loginbox_header_bgcol.';' 401: .' color:'.$loginbox_header_textcol.'">' 402: .$lt{'log'} 403: .'</h2>'; 404: 405: my $noscript_warning='<noscript><span class="LC_warning"><b>' 406: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.') 407: .'</b></span></noscript>'; 408: my $helpdeskscript; 409: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail, 410: $authdomain,\$helpdeskscript); 411: 412: my $loginform=(<<LFORM); 413: <form name="client" action="" onsubmit="return(send())"> 414: <input type="hidden" name="lextkey" value="$lextkey" /> 415: <input type="hidden" name="uextkey" value="$uextkey" /> 416: <b><label for="uname">$lt{'un'}</label>:</b><br /> 417: <input type="text" name="uname" id="uname" size="15" value="$authusername" /><br /> 418: <b><label for="upass$now">$lt{'pw'}</label>:</b><br /> 419: <input type="password" name="upass$now" id="upass$now" size="15" /><br /> 420: <b><label for="udom">$lt{'dom'}</label>:</b><br /> 421: <input type="text" name="udom" id="udom" size="15" value="$authdomain" /><br /> 422: <input type="submit" value="$lt{'log'}" /> 423: </form> 424: LFORM 425: 426: if ($showbanner) { 427: $r->print(<<HEADER); 428:  429: <div style="background:$pgbg;margin:0;width:100%;"> 430: <img src="$img" border="0" alt="The Learning Online Network with CAPA" /> 431: </div> 432: HEADER 433: } 434: $r->print(<<ENDTOP); 435: <div style="float:left;"> 436: <div class="LC_Box" style="background:$loginbox_bg;"> 437: $logintitle 438: $loginform 439: $noscript_warning 440: </div> 441: 442: <div class="LC_Box" style="padding-top: 10px;"> 443: $loginhelp 444: $forgotpw 445: $contactblock 446: $newuserlink 447: $coursecatalog 448: </div> 449: </div> 450: 451: <div> 452: ENDTOP 453: if ($showmainlogo) { 454: $r->print(' <img src="'.$logo.'" alt="" />'."\n"); 455: } 456: $r->print(<<ENDTOP); 457: $announcements 458: $domainlogo 459: </div> 460: <hr style="clear:both;" /> 461: ENDTOP 462: 463: $r->print(<<ENDDOCUMENT); 464: <table border="0" cellspacing="0" cellpadding="0"> 465: <tr> 466: <td align="left" valign="top"> 467: <small><b>$lt{'dom'}: </b></small> 468: </td> 469: <td align="left" valign="top"> 470: <small><tt> $domain</tt></small> 471: </td> 472: </tr> 473: <tr> 474: <td align="left" valign="top"> 475: <small><b>$lt{'serv'}: </b></small> 476: </td> 477: <td align="left" valign="top"> 478: <small><tt> $lonhost ($role)</tt></small> 479: </td> 480: </tr> 481: <tr> 482: <td align="left" valign="top"> 483: <small><b>$lt{'load'}: </b></small> 484: </td> 485: <td align="left" valign="top"> 486: <small><tt> $loadpercent $lt{'perc'}</tt></small> 487: </td> 488: </tr> 489: <tr> 490: <td align="left" valign="top"> 491: <small><b>$lt{'userload'}: </b></small> 492: </td> 493: <td align="left" valign="top"> 494: <small><tt> $userloadpercent $lt{'perc'}</tt></small> 495: </td> 496: </tr> 497: <tr> 498: <td colspan="2" align="left"> 499: <small>$version</small> 500: </td> 501: </tr> 502: </table> 503: </div> 504: 505: <script type="text/javascript"> 506: // <![CDATA[ 507: // the if prevents the script error if the browser can not handle this 508: if ( document.client.uname ) { document.client.uname.focus(); } 509: // ]]> 510: </script> 511: $helpdeskscript 512: 513: ENDDOCUMENT 514: my %endargs = ( 'noredirectlink' => 1, ); 515: $r->print(&Apache::loncommon::end_page(\%endargs)); 516: return OK; 517: } 518: 519: sub check_loginvia { 520: my ($domain,$lonhost) = @_; 521: if ($domain eq '' || $lonhost eq '') { 522: return; 523: } 524: my %domconfhash = &Apache::loncommon::get_domainconf($domain); 525: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost}; 526: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost}; 527: my $output; 528: if ($loginvia ne '') { 529: my $noredirect; 530: my $ip = $ENV{'REMOTE_ADDR'}; 531: if ($ip eq '127.0.0.1') { 532: $noredirect = 1; 533: } else { 534: if ($loginvia_exempt ne '') { 535: my @exempt = split(',',$loginvia_exempt); 536: if (grep(/^\Q$ip\E$/,@exempt)) { 537: $noredirect = 1; 538: } 539: } 540: } 541: unless ($noredirect) { 542: my ($newhost,$path); 543: if ($loginvia =~ /:/) { 544: ($newhost,$path) = split(':',$loginvia); 545: } else { 546: $newhost = $loginvia; 547: } 548: if ($newhost ne $lonhost) { 549: if (&Apache::lonnet::hostname($newhost) ne '') { 550: $output = &redirect_page($newhost,$path); 551: } 552: } 553: } 554: } 555: return $output; 556: } 557: 558: sub redirect_page { 559: my ($desthost,$path) = @_; 560: my $protocol = $Apache::lonnet::protocol{$desthost}; 561: $protocol = 'http' if ($protocol ne 'https'); 562: unless ($path =~ m{^/}) { 563: $path = '/'.$path; 564: } 565: my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path; 566: if ($env{'form.firsturl'} ne '') { 567: $url .='?firsturl='.$env{'form.firsturl'}; 568: } 569: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef, 570: {'redirect' => [0,$url],}); 571: my $end_page = &Apache::loncommon::end_page(); 572: return $start_page.$end_page; 573: } 574: 575: sub contactdisplay { 576: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript) = @_; 577: my $contactblock; 578: my $showhelpdesk = 0; 579: my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 580: if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) { 581: $showhelpdesk = 1; 582: } 583: if ($servadm && $showadminmail) { 584: $contactblock .= $$lt{'servadm'}.':<br />'. 585: '<tt>'.$servadm.'</tt><br />'; 586: } 587: if ($showhelpdesk) { 588: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />'; 589: my $thisurl = &escape('/adm/login'); 590: $$helpdeskscript = <<"ENDSCRIPT"; 591: <script type="text/javascript"> 592: // <![CDATA[ 593: function helpdesk() { 594: var codedom = document.client.udom.value; 595: if (codedom == '') { 596: codedom = "$authdomain"; 597: } 598: var querystr = "origurl=$thisurl&codedom="+codedom; 599: document.location.href = "/adm/helpdesk?"+querystr; 600: return; 601: } 602: // ]]> 603: </script> 604: ENDSCRIPT 605: } 606: return $contactblock; 607: } 608: 609: sub forgotpwdisplay { 610: my (%lt) = @_; 611: my $prompt_for_resetpw = 1; 612: if ($prompt_for_resetpw) { 613: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>'; 614: } 615: return; 616: } 617: 618: sub loginhelpdisplay { 619: my ($authdomain,%lt) = @_; 620: my $login_help = 1; 621: if ($login_help) { 622: my $dom = $authdomain; 623: if ($dom eq '') { 624: $dom = &Apache::lonnet::default_login_domain(); 625: } 626: my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom); 627: my $loginhelp_url = $helpconfig{'helpsettings'}{'loginhelpurl'}; 628: if ($loginhelp_url ne '') { 629: return '<a href="'.$loginhelp_url.'">'.$lt{'help'}.'</a>'; 630: } else { 631: return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>'; 632: } 633: } 634: return; 635: } 636: 637: sub coursecatalog_link { 638: my ($linkname) = @_; 639: return <<"END"; 640: <a href="/adm/coursecatalog">$linkname</a> 641: END 642: } 643: 644: sub newuser_link { 645: my ($linkname) = @_; 646: return '<a href="/adm/createaccount">'.$linkname.'</a>'; 647: } 648: 649: 1; 650: __END__