loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.71: download - view: text, annotated - select for diffs
Wed Dec 28 16:46:47 2005 UTC (18 years, 5 months ago) by albertel
Branches: MAIN
CVS tags: version_2_1_2, version_2_1_1, version_2_1_0, HEAD

- BUG #4524 swtchserver works in a backward to 2.0 and before manner

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.71 2005/12/28 16:46:47 albertel 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 CGI::Cookie(); 34: use Apache::File (); 35: use Apache::lonnet; 36: use Apache::loncommon(); 37: use Apache::lonauth(); 38: use Apache::lonlocal; 39: use Apache::migrateuser(); 40: 41: sub handler { 42: my $r = shift; 43: 44: &Apache::loncommon::get_unprocessed_cgi 45: ($ENV{'QUERY_STRING'}.'&'.$env{'request.querystring'}, 46: ['interface','username','domain','firsturl','localpath','localres', 47: 'token']); 48: 49: # -- check if they are a migrating user 50: if (defined($env{'form.token'})) { 51: return &Apache::migrateuser::handler($r); 52: } 53: 54: &Apache::loncommon::no_cache($r); 55: &Apache::lonlocal::get_language_handle($r); 56: &Apache::loncommon::content_type($r,'text/html'); 57: $r->send_http_header; 58: return OK if $r->header_only; 59: 60: 61: # Are we re-routing? 62: if (-e '/home/httpd/html/lon-status/reroute.txt') { 63: &Apache::lonauth::reroute($r); 64: return OK; 65: } 66: 67: 68: # -------------------------------- Prevent users from attempting to login twice 69: my %cookies=CGI::Cookie->parse($r->header_in('Cookie')); 70: my $lonid=$cookies{'lonID'}; 71: my $cookie; 72: if ($lonid) { 73: my $handle=$lonid->value; 74: $handle=~s/\W//g; 75: my $lonidsdir=$r->dir_config('lonIDsDir'); 76: if (-e "$lonidsdir/$handle.id") { 77: # Is there an existing token file? 78: if ($handle=~/^publicuser\_/) { 79: # For "public user" - remove it, we apparently really want to login 80: unlink("$lonidsdir/$handle.id"); 81: } elsif ($handle ne '') { 82: # Indeed, a valid token is found 83: my $bodytag=&Apache::loncommon::bodytag('Already logged in'); 84: $r->print(<<ENDFAILED); 85: <html> 86: <head> 87: <title>Already logged in</title> 88: </head> 89: $bodytag 90: <h1>You are already logged in</h1> 91: <p>Please either <a href="/adm/roles">continue the current session</a> or 92: <a href="/adm/logout">logout</a>.</p> 93: <p> 94: <a href="/adm/loginproblems.html">Problems?</a></p> 95: </body> 96: </html> 97: ENDFAILED 98: return OK; 99: } 100: } 101: } 102: 103: # ---------------------------------------------------- No valid token, continue 104: 105: # ---------------------------- Not possible to really login to domain "public" 106: if ($env{'form.domain'} eq 'public') { 107: $env{'form.domain'}=''; 108: $env{'form.username'}=''; 109: } 110: # ----------------------------------------------------------- Process Interface 111: $env{'form.interface'}=~s/\W//g; 112: 113: my $textbrowsers=$r->dir_config('lonTextBrowsers'); 114: my $httpbrowser=$ENV{"HTTP_USER_AGENT"}; 115: 116: foreach (split(/\:/,$textbrowsers)) { 117: if ($httpbrowser=~/$_/i) { 118: $env{'form.interface'}='textual'; 119: } 120: } 121: 122: my $fullgraph=($env{'form.interface'} ne 'textual'); 123: my $port_to_use=$r->dir_config('lonhttpdPort'); 124: if (!defined($port_to_use)) { 125: $port_to_use='8080'; 126: } 127: my $iconpath= 'http://'.$ENV{'HTTP_HOST'}.':'.$port_to_use. 128: $r->dir_config('lonIconsURL'); 129: my $domain = $r->dir_config('lonDefDomain'); 130: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0]; 131: foreach my $posdom (&Apache::lonnet::current_machine_domains()) { 132: if ($posdom eq $testdomain) { $domain=$testdomain; } 133: } 134: if (($env{'form.domain'}) && 135: ($Apache::lonnet::domaindescription{$env{'form.domain'}})) { 136: $domain=$env{'form.domain'}; 137: } 138: my $role = $r->dir_config('lonRole'); 139: my $loadlim = $r->dir_config('lonLoadLim'); 140: my $servadm = $r->dir_config('lonAdmEMail'); 141: my $sysadm = $r->dir_config('lonSysEMail'); 142: my $lonhost = $r->dir_config('lonHostID'); 143: my $tabdir = $r->dir_config('lonTabDir'); 144: my $include = $r->dir_config('lonIncludes'); 145: my $expire = $r->dir_config('lonExpire'); 146: my $version = $r->dir_config('lonVersion'); 147: 148: # --------------------------------------------- Default values for login fields 149: 150: my $authusername=($env{'form.username'}?$env{'form.username'}:''); 151: my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain); 152: 153: # ---------------------------------------------------------- Determine own load 154: my $loadavg; 155: { 156: my $loadfile=Apache::File->new('/proc/loadavg'); 157: $loadavg=<$loadfile>; 158: } 159: $loadavg =~ s/\s.*//g; 160: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 161: my $userloadpercent=&Apache::lonnet::userload(); 162: 163: # ------------------------------------------------------- Do the load balancing 164: my $otherserver='http://'.$ENV{'SERVER_NAME'}; 165: my $firsturl= 166: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'}); 167: # ---------------------------------------- Are we access server and overloaded? 168: if (($role eq 'access') && 169: (($userloadpercent>100.0)||($loadpercent>100.0))) { 170: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent); 171: if ($unloaded) { $otherserver=$unloaded; } 172: } 173: 174: # ----------------------------------------------------------- Get announcements 175: my $announcements=&Apache::lonnet::getannounce(); 176: # -------------------------------------------------------- Set login parameters 177: 178: my @hexstr=('0','1','2','3','4','5','6','7', 179: '8','9','a','b','c','d','e','f'); 180: my $lkey=''; 181: for (0..7) { 182: $lkey.=$hexstr[rand(15)]; 183: } 184: 185: my $ukey=''; 186: for (0..7) { 187: $ukey.=$hexstr[rand(15)]; 188: } 189: 190: my $lextkey=hex($lkey); 191: if ($lextkey>2147483647) { $lextkey-=4294967296; } 192: 193: my $uextkey=hex($ukey); 194: if ($uextkey>2147483647) { $uextkey-=4294967296; } 195: 196: # -------------------------------------------------------- Store away log token 197: my $logtoken=Apache::lonnet::reply( 198: 'tmpput:'.$ukey.$lkey.'&'.$firsturl, 199: $lonhost); 200: 201: # ------------------- If we cannot talk to ourselves, we are in serious trouble 202: 203: if ($logtoken eq 'con_lost') { 204: my $spares=''; 205: my $last; 206: foreach my $hostid (sort 207: { 208: $Apache::lonnet::hostname{$a} cmp 209: $Apache::lonnet::hostname{$b}; 210: } 211: keys(%Apache::lonnet::spareid)) { 212: next if ($hostid eq $lonhost); 213: next if ($last eq $Apache::lonnet::hostname{$hostid}); 214: $spares.='<br /><font size="+1"><a href="http://'. 215: $Apache::lonnet::hostname{$hostid}. 216: '/adm/login?domain='.$authdomain.'">'. 217: $Apache::lonnet::hostname{$hostid}.'</a>'. 218: ' (preferred)</font>'.$/; 219: $last=$Apache::lonnet::hostname{$hostid}; 220: } 221: $spares.= '<br />'; 222: foreach my $hostid (sort 223: { 224: $Apache::lonnet::hostname{$a} cmp 225: $Apache::lonnet::hostname{$b}; 226: } 227: keys(%Apache::lonnet::hostname)) { 228: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); 229: next if ($last eq $Apache::lonnet::hostname{$hostid}); 230: $spares.='<br /><a href="http://'. 231: $Apache::lonnet::hostname{$hostid}. 232: '/adm/login?domain='.$authdomain.'">'. 233: $Apache::lonnet::hostname{$hostid}.'</a>'; 234: $last=$Apache::lonnet::hostname{$hostid}; 235: } 236: $r->print(<<ENDTROUBLE); 237: <html> 238: <head><title>The LearningOnline Network with CAPA</title></head> 239: <body bgcolor="#FFFFFF"> 240: <img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" /> 241: <h3>This LON-CAPA server is temporarily not available for login</h3> 242: <p>Please attempt to login to one of the following servers:</p>$spares 243: <p>If the problem persists, please contact <tt>$servadm</tt>.</p> 244: </body> 245: </html> 246: ENDTROUBLE 247: return OK; 248: } 249: 250: # ----------------------------------------------- Apparently we are in business 251: 252: my $domainlogo=&Apache::loncommon::domainlogo($domain); 253: $servadm=~s/\,/\<br \/\>/g; 254: $sysadm=~s/\,/\<br \/\>/g; 255: 256: # --------------------------------------------------- Print login screen header 257: $r->print(<<ENDHEADER); 258: <html> 259: <head> 260: <meta HTTP-EQUIV="Refresh" CONTENT="$expire; url=/adm/roles" /> 261: <title>The LearningOnline Network with CAPA Login</title> 262: </head> 263: ENDHEADER 264: # ---------------------------------------------------- Serve out DES JavaScript 265: { 266: my $jsh=Apache::File->new($include."/londes.js"); 267: $r->print(<$jsh>); 268: } 269: 270: # ----------------------------------------------------------- Front page design 271: my $pgbg= 272: ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF'); 273: my $font= 274: ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000'); 275: my $link= 276: ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF'); 277: my $vlink= 278: ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF'); 279: my $alink=&Apache::loncommon::designparm('login.alink',$domain); 280: my $mainbg= 281: ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF'); 282: my $sidebg= 283: ($fullgraph?&Apache::loncommon::designparm('login.sidebg',$domain):'#FFFFFF'); 284: my $logo=&Apache::loncommon::designparm('login.logo',$domain); 285: my $img=&Apache::loncommon::designparm('login.img',$domain); 286: 287: # ----------------------------------------------------------------------- Texts 288: 289: my %lt=&Apache::lonlocal::texthash( 290: 'un' => 'Username', 291: 'pw' => 'Password', 292: 'dom' => 'Domain', 293: 'perc' => 'percent', 294: 'load' => 'Load', 295: 'userload' => 'User Load', 296: 'about' => 'aboutlon.gif', 297: 'access' => 'accessbutton.gif', 298: 'auth' => 'userauthentication.gif', 299: 'log' => 'Log in', 300: 'help' => 'Help', 301: 'serv' => 'Server', 302: 'servadm' => 'Server Administration', 303: 'sysadm' => 'System Administration', 304: 'helpdesk' => 'Contact Helpdesk'); 305: # -------------------------------------------------- Change password field name 306: my $now=time; 307: # ---------------------------------------------------------- Serve rest of page 308: $r->print(<<ENDSCRIPT); 309: 310: <body bgcolor="$pgbg" text="$font" link="$link" vlink="$vlink" alink="$alink" 311: topmargin=0 leftmargin=0 marginwidth=0 marginheight=0> 312: 313: <script language="JavaScript"> 314: function send() 315: { 316: this.document.server.elements.uname.value 317: =this.document.client.elements.uname.value; 318: 319: this.document.server.elements.udom.value 320: =this.document.client.elements.udom.value; 321: 322: this.document.server.elements.imagesuppress.value 323: =this.document.client.elements.imagesuppress.checked; 324: 325: this.document.server.elements.embedsuppress.value 326: =this.document.client.elements.embedsuppress.checked; 327: 328: this.document.server.elements.appletsuppress.value 329: =this.document.client.elements.appletsuppress.checked; 330: 331: this.document.server.elements.fontenhance.value 332: =this.document.client.elements.fontenhance.checked; 333: 334: this.document.server.elements.blackwhite.value 335: =this.document.client.elements.blackwhite.checked; 336: 337: this.document.server.elements.remember.value 338: =this.document.client.elements.remember.checked; 339: 340: uextkey=this.document.client.elements.uextkey.value; 341: lextkey=this.document.client.elements.lextkey.value; 342: initkeys(); 343: 344: this.document.server.elements.upass0.value 345: =crypted(this.document.client.elements.upass$now.value.substr(0,15)); 346: this.document.server.elements.upass1.value 347: =crypted(this.document.client.elements.upass$now.value.substr(15,15)); 348: this.document.server.elements.upass2.value 349: =crypted(this.document.client.elements.upass$now.value.substr(30,15)); 350: 351: this.document.client.elements.uname.value=''; 352: this.document.client.elements.upass$now.value=''; 353: 354: this.document.server.submit(); 355: return false; 356: } 357: </script> 358: ENDSCRIPT 359: 360: if ($fullgraph) { 361: $r->print( 362: '<table width="100%" cellpadding=0 cellspacing=0 border=0>'); 363: } 364: 365: $r->print(<<ENDSERVERFORM); 366: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top"> 367: <input type="hidden" name="logtoken" value="$logtoken" /> 368: <input type="hidden" name="serverid" value="$lonhost" /> 369: <input type="hidden" name="interface" value="$env{'form.interface'}" /> 370: <input type="hidden" name="uname" value="" /> 371: <input type="hidden" name="upass0" value="" /> 372: <input type="hidden" name="upass1" value="" /> 373: <input type="hidden" name="upass2" value="" /> 374: <input type="hidden" name="udom" value="" /> 375: <input type="hidden" name="imagesuppress" value="" /> 376: <input type="hidden" name="appletsuppress" value="" /> 377: <input type="hidden" name="embedsuppress" value="" /> 378: <input type="hidden" name="fontenhance" value="" /> 379: <input type="hidden" name="blackwhite" value="" /> 380: <input type="hidden" name="remember" value="" /> 381: <input type="hidden" name="localpath" value="$env{'form.localpath'}" /> 382: <input type="hidden" name="localres" value="$env{'form.localres'}" /> 383: </form> 384: ENDSERVERFORM 385: if ($fullgraph) { $r->print(<<ENDTOP); 386:  387: <tr> 388: 389:  390: <td width="100%" height=75 colspan=4 align="left" valign="top" bgcolor="$pgbg"><img src="$img" border=0 alt="The Learning Online Network with CAPA" /></td> 391: </tr> 392: 393:  394: <tr> 395: 396:  397: <td width=182 height=27 bgcolor="$sidebg"> </td> 398: 399:  400: <td width=27 height=27 align="left" background="$iconpath/filltop.gif"><img src="$iconpath/upperleft.gif" border=0 alt="" /></td> 401: 402:  403: <td height=27 background="$iconpath/filltop.gif"><img src="$iconpath/filltop.gif" alt="" /></td> 404: 405:  406: <td width=27 height=27 align="right" background="$iconpath/filltop.gif"><img src="$iconpath/upperright.gif" border=0 alt="" /></td> 407: </tr> 408: <tr> 409: 410:  411:  412: <td valign="top" height=60 align="center" bgcolor="$sidebg"> 413: <a href="/adm/login?interface=textual"><img src="$iconpath/$lt{'access'}" border=0 alt="Accessibility Options" /></a> 414: <br /> 415: <a href="/adm/about.html"><img src="$iconpath/$lt{'about'}" border=0 alt="About LON-CAPA" /></a> 416: </td> 417: 418:  419:  420: <td width=27 height=60 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 421: 422:  423:  424: <td align="center" valign="top" width="100%" height="100%" bgcolor="$mainbg"> 425: <center> 426: <img src="$logo" alt="" /> 427: </center> 428: </td> 429: 430:  431: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 432: </tr> 433: <tr> 434: 435:  436:  437: <td align="center" valign="middle" bgcolor="$sidebg"> 438: ENDTOP 439: } else { 440: $r->print('<h1>The Learning<i>Online</i> Network with CAPA</h1><h2>Text-based Interface Login</h2>'.$announcements); 441: } 442: $r->print('<form name="client" onsubmit="return(send())">'); 443: unless ($fullgraph) { 444: $r->print(<<ENDACCESSOPTIONS); 445: <h3>Select Accessibility Options</h3> 446: <label><input type="checkbox" name="imagesuppress" /> Suppress rendering of images</label><br /> 447: <label><input type="checkbox" name="appletsuppress" /> Suppress Java applets</label><br /> 448: <label><input type="checkbox" name="embedsuppress" /> Suppress rendering of embedded multimedia</label><br /> 449: <label><input type="checkbox" name="fontenhance" /> Increase font size</label><br /> 450: <label><input type="checkbox" name="blackwhite" /> Switch to black and white mode</label><br /> 451: <p>If you have accessibility needs that are not addressed by this interface, 452: please 453: contact the system administrator at <tt>$sysadm</tt>.</p><br /> 454: <input type="checkbox" name="remember" /> Remember these settings for next login<hr /> 455: ENDACCESSOPTIONS 456: } else { 457: $r->print(<<ENDNOOPT); 458: <input type="hidden" name="imagesuppress" value="" /> 459: <input type="hidden" name="embedsuppress" value="" /> 460: <input type="hidden" name="appletsuppress" value="" /> 461: <input type="hidden" name="fontenhance" value="" /> 462: <input type="hidden" name="blackwhite" value="" /> 463: <input type="hidden" name="remember" value="" /> 464: ENDNOOPT 465: } 466: $r->print(<<ENDLOGIN); 467: <input type="hidden" name="lextkey" value="$lextkey"> 468: <input type="hidden" name="uextkey" value="$uextkey"> 469: 470:  471: <table border=0 cellspacing=0 cellpadding=0> 472: <tr><td bgcolor="$sidebg" colspan=2><img src="$iconpath/$lt{'auth'}" alt="User Authentication" /></td></tr> 473: <tr> 474: <td bgcolor="$mainbg"><br /><font size=-1><b>   $lt{'un'}:</b></font></td> 475: <td bgcolor="$mainbg"><br /><input type="text" name="uname" size="10" value="$authusername" /></td> 476: </tr> 477: <tr> 478: <td bgcolor="$mainbg"><font size=-1><b>   $lt{'pw'}:</b></font></td> 479: <td bgcolor="$mainbg"><input type="password" name="upass$now" size="10" /></td> 480: </tr> 481: <tr> 482: <td bgcolor="$mainbg"><font size=-1><b>   $lt{'dom'}:</b></font></td> 483: <td bgcolor="$mainbg"><input type="text" name="udom" size="10" value="$authdomain" /></td> 484: </tr> 485: <tr> 486: <td bgcolor="$mainbg">   <a href="/adm/loginproblems.html">$lt{'help'}</a></td> 487: <td bgcolor="$mainbg" valign="bottom" align="center"> 488: <br /> 489: <input type="submit" value="$lt{'log'}" /> 490: </td> 491: </tr> 492: </table> 493:  494: </form> 495: ENDLOGIN 496: if ($fullgraph) { 497: my $helpdeskscript; 498: my $contactblock = &contactdisplay(\%lt,$sysadm,$servadm,$version,$authdomain,\$helpdeskscript); 499: $r->print(<<ENDDOCUMENT); 500: </td> 501: 502:  503: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 504: 505:  506: <td bgcolor="$mainbg">$announcements</td> 507: 508:  509: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 510: </tr> 511: <tr> 512: 513:  514: <td bgcolor="$sidebg" valign="middle" align="left"> 515: <br /> 516: <table border=0 cellspacing=0 cellpadding=0> 517: <tr> 518: <td bgcolor="$sidebg" align="left" valign="top"> 519: <small><b>   $lt{'dom'}: </b></small> 520: </td> 521: <td bgcolor="$sidebg" align="left" valign="top"> 522: <small><tt> $domain</tt></small> 523: </td> 524: </tr> 525: <tr> 526: <td bgcolor="$sidebg" align="left" valign="top"> 527: <small><b>   $lt{'serv'}: </b></small> 528: </td> 529: <td bgcolor="$sidebg" align="left" valign="top"> 530: <small><tt> $lonhost ($role)</tt></small> 531: </td> 532: </tr> 533: <tr> 534: <td bgcolor="$sidebg" align="left" valign="top"> 535: <small><b>   $lt{'load'}: </b></small> 536: </td> 537: <td bgcolor="$sidebg" align="left" valign="top"> 538: <small><tt> $loadpercent $lt{'perc'}</tt></small> 539: </td> 540: </tr> 541: <tr> 542: <td bgcolor="$sidebg" align="left" valign="top"> 543: <small><b>   $lt{'userload'}: </b></small> 544: </td> 545: <td bgcolor="$sidebg" align="left" valign="top"> 546: <small><tt> $userloadpercent $lt{'perc'}</tt></small> 547: </td> 548: </tr> 549: </table> 550: <br /> 551: $contactblock 552: </td> 553: 554:  555: <td width=27 background="$iconpath/fillleft.gif"><img src="$iconpath/fillleft.gif" alt="" /></td> 556: 557:  558: <td width="100%" valign="bottom" bgcolor="$mainbg"> 559: $domainlogo 560: </td> 561: 562:  563: <td width=27 background="$iconpath/fillright.gif"><img src="$iconpath/fillright.gif" alt="" /></td> 564: </tr> 565: <tr> 566: 567:  568: <td bgcolor="$sidebg"> </td> 569: 570:  571: <td align="left" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerleft.gif" alt="" /></td> 572: 573:  574: <td background="$iconpath/fillbottom.gif"><img src="$iconpath/fillbottom.gif" alt="" /></td> 575: 576:  577: <td align="right" background="$iconpath/fillbottom.gif"><img src="$iconpath/lowerright.gif" alt="" /></td> 578: </tr> 579: </table> 580: 581: <script type="text/javascript"> 582: // the if prevents the script error if the browser can not handle this 583: if ( document.client.uname ) { document.client.uname.focus(); } 584: </script> 585: $helpdeskscript 586: 587: ENDDOCUMENT 588: } 589: $r->print('</body></html>'); 590: return OK; 591: } 592: 593: sub contactdisplay { 594: my ($lt,$sysadm,$servadm,$version,$authdomain,$helpdeskscript) = @_; 595: my $contactblock; 596: my $showsysadm = 1; 597: my $showservadm = 1; 598: my $showhelpdesk = 0; 599: my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 600: if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) { 601: $showhelpdesk = 1; 602: } 603: if ($showsysadm) { 604: $contactblock .= '<b>   '.$$lt{'sysadm'}.':</b><br />'. 605: '<tt>      '.$sysadm.'</tt><br />'; 606: } 607: if ($showservadm) { 608: $contactblock .= '<b>   '.$$lt{'servadm'}.':</b><br />'. 609: '<tt>      '.$servadm.'</tt><br /> <br />'; 610: } 611: if ($showhelpdesk) { 612: $contactblock .= '<b>   <a href="javascript:helpdesk()">'.$$lt{'helpdesk'}.'</a></b><br />'; 613: my $thisurl = &Apache::lonnet::escape('/adm/login'); 614: $$helpdeskscript = <<"ENDSCRIPT"; 615: <script type="text/javascript"> 616: function helpdesk() { 617: var codedom = document.client.udom.value; 618: if (codedom == '') { 619: codedom = "$authdomain"; 620: } 621: var querystr = "origurl=$thisurl&codedom="+codedom; 622: document.location.href = "/adm/helpdesk?"+querystr; 623: return; 624: } 625: </script> 626: ENDSCRIPT 627: } 628: $contactblock .= <<"ENDBLOCK"; 629:    $version 630: ENDBLOCK 631: return $contactblock; 632: } 633: 634: 635: 1; 636: __END__