loncom/auth/lonlogin.pm - view

File: [LON-CAPA] / loncom / auth / lonlogin.pm
Revision 1.157: download - view: text, annotated - select for diffs
Sun Sep 29 00:49:24 2013 UTC (10 years, 8 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Bug 6675
- Case where $env{'REMOTE_ADDR'} as reported to server selected to host
  user session, is different from $env{'REMOTE_ADDR'} as reported to
  server which handled original authentication request.
  - Domain configuration for a load balancing server can be set to one of
    the following, if an IP mismatch is detected by /adm/migrateuser
    during credentials checking after redirect via /adm/switchserver
    (i) Session will be hosted on Load Balancer
    (ii) Session will be hosted on offload server
    for each of (a) SSO users from load balancer's domain, (b) non-SSO users
  - Setting to host on load balancer will be ignored if switch server was called
    by an author or co-author switching to server housing the authoring space.

1: # The LearningOnline Network 2: # Login Screen 3: # 4: # $Id: lonlogin.pm,v 1.157 2013/09/29 00:49:24 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::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: $ENV{'REDIRECT_QUERY_STRING'}), 48: ['interface','username','domain','firsturl','localpath','localres', 49: 'token','role','symb','iptoken']); 50: if (!defined($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: my $londocroot = $r->dir_config('lonDocRoot'); 68: if (-e "$londocroot/lon-status/reroute.txt") { 69: &Apache::lonauth::reroute($r); 70: return OK; 71: } 72: 73: $env{'form.firsturl'} =~ s/(`)/'/g; 74: 75: # -------------------------------- Prevent users from attempting to login twice 76: my $handle = &Apache::lonnet::check_for_valid_session($r); 77: if ($handle ne '') { 78: my $lonidsdir=$r->dir_config('lonIDsDir'); 79: if ($handle=~/^publicuser\_/) { 80: # For "public user" - remove it, we apparently really want to login 81: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 82: } else { 83: # Indeed, a valid token is found 84: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 85: my $start_page = 86: &Apache::loncommon::start_page('Already logged in'); 87: my $end_page = 88: &Apache::loncommon::end_page(); 89: my $dest = '/adm/roles'; 90: if ($env{'form.firsturl'} ne '') { 91: $dest = $env{'form.firsturl'}; 92: } 93: $r->print( 94: $start_page 95: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>' 96: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].', 97: '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>' 98: .$end_page 99: ); 100: return OK; 101: } 102: } 103: 104: # ---------------------------------------------------- No valid token, continue 105: 106: # ---------------------------- Not possible to really login to domain "public" 107: if ($env{'form.domain'} eq 'public') { 108: $env{'form.domain'}=''; 109: $env{'form.username'}=''; 110: } 111: 112: # ------ Is this page requested because /adm/migrateuser detected an IP change? 113: my %sessiondata; 114: if ($env{'form.iptoken'}) { 115: %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'}); 116: my $delete = &Apache::lonnet::tmpdel($env{'form.token'}); 117: } 118: # ----------------------------------------------------------- Process Interface 119: $env{'form.interface'}=~s/\W//g; 120: 121: (undef,undef,undef,undef,undef,undef,my $clientmobile) = 122: &Apache::loncommon::decode_user_agent(); 123: 124: my $iconpath= 125: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL')); 126: 127: my $lonhost = $r->dir_config('lonHostID'); 128: my $domain = &Apache::lonnet::default_login_domain(); 129: if ($lonhost ne '') { 130: unless ($sessiondata{'sessionserver'}) { 131: my $redirect = &check_loginvia($domain,$lonhost); 132: if ($redirect) { 133: $r->print($redirect); 134: return OK; 135: } 136: } 137: } 138: 139: if (($sessiondata{'domain'}) && 140: (&Apache::lonnet::domain($env{'form.domain'},'description'))) { 141: $domain=$sessiondata{'domain'}; 142: } elsif (($env{'form.domain'}) && 143: (&Apache::lonnet::domain($env{'form.domain'},'description'))) { 144: $domain=$env{'form.domain'}; 145: } 146: 147: my $role = $r->dir_config('lonRole'); 148: my $loadlim = $r->dir_config('lonLoadLim'); 149: my $uloadlim= $r->dir_config('lonUserLoadLim'); 150: my $servadm = $r->dir_config('lonAdmEMail'); 151: my $tabdir = $r->dir_config('lonTabDir'); 152: my $include = $r->dir_config('lonIncludes'); 153: my $expire = $r->dir_config('lonExpire'); 154: my $version = $r->dir_config('lonVersion'); 155: my $host_name = &Apache::lonnet::hostname($lonhost); 156: 157: # --------------------------------------------- Default values for login fields 158: 159: my ($authusername,$authdomain); 160: if ($sessiondata{'username'}) { 161: $authusername=$sessiondata{'username'}; 162: } else { 163: $authusername=($env{'form.username'}?$env{'form.username'}:''); 164: } 165: if ($sessiondata{'domain'}) { 166: $authdomain=$sessiondata{'domain'}; 167: } else { 168: $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain); 169: } 170: 171: # ---------------------------------------------------------- Determine own load 172: my $loadavg; 173: { 174: my $loadfile=Apache::File->new('/proc/loadavg'); 175: $loadavg=<$loadfile>; 176: } 177: $loadavg =~ s/\s.*//g; 178: 179: my ($loadpercent,$userloadpercent); 180: if ($loadlim) { 181: $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 182: } 183: if ($uloadlim) { 184: $userloadpercent=&Apache::lonnet::userload(); 185: } 186: 187: my $firsturl= 188: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'}); 189: 190: # ----------------------------------------------------------- Get announcements 191: my $announcements=&Apache::lonnet::getannounce(); 192: # -------------------------------------------------------- Set login parameters 193: 194: my @hexstr=('0','1','2','3','4','5','6','7', 195: '8','9','a','b','c','d','e','f'); 196: my $lkey=''; 197: for (0..7) { 198: $lkey.=$hexstr[rand(15)]; 199: } 200: 201: my $ukey=''; 202: for (0..7) { 203: $ukey.=$hexstr[rand(15)]; 204: } 205: 206: my $lextkey=hex($lkey); 207: if ($lextkey>2147483647) { $lextkey-=4294967296; } 208: 209: my $uextkey=hex($ukey); 210: if ($uextkey>2147483647) { $uextkey-=4294967296; } 211: 212: # -------------------------------------------------------- Store away log token 213: my $tokenextras; 214: if ($env{'form.role'}) { 215: $tokenextras = '&role='.&escape($env{'form.role'}); 216: } 217: if ($env{'form.symb'}) { 218: if (!$tokenextras) { 219: $tokenextras = '&'; 220: } 221: $tokenextras .= '&symb='.&escape($env{'form.symb'}); 222: } 223: my $logtoken=Apache::lonnet::reply( 224: 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras, 225: $lonhost); 226: 227: # -- If we cannot talk to ourselves, or hostID does not map to a hostname 228: # we are in serious trouble 229: 230: if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) { 231: if ($logtoken eq 'no_such_host') { 232: &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab'); 233: } 234: my $spares=''; 235: my $last; 236: foreach my $hostid (sort 237: { 238: &Apache::lonnet::hostname($a) cmp 239: &Apache::lonnet::hostname($b); 240: } 241: keys(%Apache::lonnet::spareid)) { 242: next if ($hostid eq $lonhost); 243: my $hostname = &Apache::lonnet::hostname($hostid); 244: next if (($last eq $hostname) || ($hostname eq '')); 245: $spares.='<br /><font size="+1"><a href="http://'. 246: $hostname. 247: '/adm/login?domain='.$authdomain.'">'. 248: $hostname.'</a>'. 249: ' '.&mt('(preferred)').'</font>'.$/; 250: $last=$hostname; 251: } 252: if ($spares) { 253: $spares.= '<br />'; 254: } 255: my %all_hostnames = &Apache::lonnet::all_hostnames(); 256: foreach my $hostid (sort 257: { 258: &Apache::lonnet::hostname($a) cmp 259: &Apache::lonnet::hostname($b); 260: } 261: keys(%all_hostnames)) { 262: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid}); 263: my $hostname = &Apache::lonnet::hostname($hostid); 264: next if (($last eq $hostname) || ($hostname eq '')); 265: $spares.='<br /><a href="http://'. 266: $hostname. 267: '/adm/login?domain='.$authdomain.'">'. 268: $hostname.'</a>'; 269: $last=$hostname; 270: } 271: $r->print( 272: '<html>' 273: .'<head><title>' 274: .&mt('The LearningOnline Network with CAPA') 275: .'</title></head>' 276: .'<body bgcolor="#FFFFFF">' 277: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>' 278: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />' 279: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'); 280: if ($spares) { 281: $r->print('<p>'.&mt('Please attempt to login to one of the following servers:') 282: .'</p>' 283: .$spares); 284: } 285: $r->print('</body>' 286: .'</html>' 287: ); 288: return OK; 289: } 290: 291: # ----------------------------------------------- Apparently we are in business 292: $servadm=~s/\,/\<br \/\>/g; 293: 294: # ----------------------------------------------------------- Front page design 295: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain); 296: my $font=&Apache::loncommon::designparm('login.font',$domain); 297: my $link=&Apache::loncommon::designparm('login.link',$domain); 298: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain); 299: my $alink=&Apache::loncommon::designparm('login.alink',$domain); 300: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain); 301: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain); 302: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain); 303: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain); 304: my $logo=&Apache::loncommon::designparm('login.logo',$domain); 305: my $img=&Apache::loncommon::designparm('login.img',$domain); 306: my $domainlogo=&Apache::loncommon::domainlogo($domain); 307: my $showbanner = 1; 308: my $showmainlogo = 1; 309: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) { 310: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain); 311: } 312: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) { 313: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain); 314: } 315: my $showadminmail; 316: my @possdoms = &Apache::lonnet::current_machine_domains(); 317: if (grep(/^\Q$domain\E$/,@possdoms)) { 318: $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain); 319: } 320: my $showcoursecat = 321: &Apache::loncommon::designparm('login.coursecatalog',$domain); 322: my $shownewuserlink = 323: &Apache::loncommon::designparm('login.newuser',$domain); 324: my $showhelpdesk = 325: &Apache::loncommon::designparm('login.helpdesk',$domain); 326: my $now=time; 327: my $js = (<<ENDSCRIPT); 328: 329: <script type="text/javascript" language="JavaScript"> 330: // <![CDATA[ 331: function send() 332: { 333: this.document.server.elements.uname.value 334: =this.document.client.elements.uname.value; 335: 336: this.document.server.elements.udom.value 337: =this.document.client.elements.udom.value; 338: 339: uextkey=this.document.client.elements.uextkey.value; 340: lextkey=this.document.client.elements.lextkey.value; 341: initkeys(); 342: 343: this.document.server.elements.upass0.value 344: =crypted(this.document.client.elements.upass$now.value.substr(0,15)); 345: this.document.server.elements.upass1.value 346: =crypted(this.document.client.elements.upass$now.value.substr(15,15)); 347: this.document.server.elements.upass2.value 348: =crypted(this.document.client.elements.upass$now.value.substr(30,15)); 349: 350: this.document.client.elements.uname.value=''; 351: this.document.client.elements.upass$now.value=''; 352: 353: this.document.server.submit(); 354: return false; 355: } 356: 357: function enableInput() { 358: this.document.client.elements.upass$now.removeAttribute("readOnly"); 359: this.document.client.elements.uname.removeAttribute("readOnly"); 360: this.document.client.elements.udom.removeAttribute("readOnly"); 361: return; 362: } 363: 364: // ]]> 365: </script> 366: 367: ENDSCRIPT 368: 369: # --------------------------------------------------- Print login screen header 370: 371: my %add_entries = ( 372: bgcolor => "$mainbg", 373: text => "$font", 374: link => "$link", 375: vlink => "$vlink", 376: alink => "$alink", 377: onload => 'javascript:enableInput();',); 378: 379: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js, 380: { 'redirect' => [$expire,'/adm/roles'], 381: 'add_entries' => \%add_entries, 382: 'only_body' => 1,})); 383: 384: # ----------------------------------------------------------------------- Texts 385: 386: my %lt=&Apache::lonlocal::texthash( 387: 'un' => 'Username', 388: 'pw' => 'Password', 389: 'dom' => 'Domain', 390: 'perc' => 'percent', 391: 'load' => 'Server Load', 392: 'userload' => 'User Load', 393: 'catalog' => 'Course/Community Catalog', 394: 'log' => 'Log in', 395: 'help' => 'Log-in Help', 396: 'serv' => 'Server', 397: 'servadm' => 'Server Administration', 398: 'helpdesk' => 'Contact Helpdesk', 399: 'forgotpw' => 'Forgot password?', 400: 'newuser' => 'New User?', 401: ); 402: # -------------------------------------------------- Change password field name 403: 404: my $forgotpw = &forgotpwdisplay(%lt); 405: $forgotpw .= '<br />' if $forgotpw; 406: my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain); 407: if ($loginhelp) { 408: $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />'; 409: } 410: 411: # ---------------------------------------------------- Serve out DES JavaScript 412: { 413: my $jsh=Apache::File->new($include."/londes.js"); 414: $r->print(<$jsh>); 415: } 416: # ---------------------------------------------------------- Serve rest of page 417: 418: $r->print( 419: '<div class="LC_Box"' 420: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">' 421: ); 422: 423: $r->print(<<ENDSERVERFORM); 424: <form name="server" action="/adm/authenticate" method="post" target="_top"> 425: <input type="hidden" name="logtoken" value="$logtoken" /> 426: <input type="hidden" name="serverid" value="$lonhost" /> 427: <input type="hidden" name="uname" value="" /> 428: <input type="hidden" name="upass0" value="" /> 429: <input type="hidden" name="upass1" value="" /> 430: <input type="hidden" name="upass2" value="" /> 431: <input type="hidden" name="udom" value="" /> 432: <input type="hidden" name="localpath" value="$env{'form.localpath'}" /> 433: <input type="hidden" name="localres" value="$env{'form.localres'}" /> 434: </form> 435: ENDSERVERFORM 436: my $coursecatalog; 437: if (($showcoursecat eq '') || ($showcoursecat)) { 438: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />'; 439: } 440: my $newuserlink; 441: if ($shownewuserlink) { 442: $newuserlink = &newuser_link($lt{'newuser'}).'<br />'; 443: } 444: my $logintitle = 445: '<h2 class="LC_hcell"' 446: .' style="background:'.$loginbox_header_bgcol.';' 447: .' color:'.$loginbox_header_textcol.'">' 448: .$lt{'log'} 449: .'</h2>'; 450: 451: my $noscript_warning='<noscript><span class="LC_warning"><b>' 452: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.') 453: .'</b></span></noscript>'; 454: my $helpdeskscript; 455: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail, 456: $authdomain,\$helpdeskscript, 457: $showhelpdesk,\@possdoms); 458: 459: my $mobileargs; 460: if ($clientmobile) { 461: $mobileargs = 'autocapitalize="off" autocorrect="off"'; 462: } 463: my $loginform=(<<LFORM); 464: <form name="client" action="" onsubmit="return(send())"> 465: <input type="hidden" name="lextkey" value="$lextkey" /> 466: <input type="hidden" name="uextkey" value="$uextkey" /> 467: <b><label for="uname">$lt{'un'}</label>:</b><br /> 468: <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br /> 469: <b><label for="upass$now">$lt{'pw'}</label>:</b><br /> 470: <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br /> 471: <b><label for="udom">$lt{'dom'}</label>:</b><br /> 472: <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br /> 473: <input type="submit" value="$lt{'log'}" /> 474: </form> 475: LFORM 476: 477: if ($showbanner) { 478: $r->print(<<HEADER); 479:  480: <div style="background:$pgbg;margin:0;width:100%;"> 481: <img src="$img" border="0" alt="The Learning Online Network with CAPA" /> 482: </div> 483: HEADER 484: } 485: $r->print(<<ENDTOP); 486: <div style="float:left;margin-top:0;"> 487: <div class="LC_Box" style="background:$loginbox_bg;"> 488: $logintitle 489: $loginform 490: $noscript_warning 491: </div> 492: 493: <div class="LC_Box" style="padding-top: 10px;"> 494: $loginhelp 495: $forgotpw 496: $contactblock 497: $newuserlink 498: $coursecatalog 499: </div> 500: </div> 501: 502: <div> 503: ENDTOP 504: if ($showmainlogo) { 505: $r->print(' <img src="'.$logo.'" alt="" />'."\n"); 506: } 507: $r->print(<<ENDTOP); 508: $announcements 509: </div> 510: <hr style="clear:both;" /> 511: ENDTOP 512: my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow); 513: $domainrow = <<"END"; 514: <tr> 515: <td align="left" valign="top"> 516: <small><b>$lt{'dom'}: </b></small> 517: </td> 518: <td align="left" valign="top"> 519: <small><tt> $domain</tt></small> 520: </td> 521: </tr> 522: END 523: $serverrow = <<"END"; 524: <tr> 525: <td align="left" valign="top"> 526: <small><b>$lt{'serv'}: </b></small> 527: </td> 528: <td align="left" valign="top"> 529: <small><tt> $lonhost ($role)</tt></small> 530: </td> 531: </tr> 532: END 533: if ($loadlim) { 534: $loadrow = <<"END"; 535: <tr> 536: <td align="left" valign="top"> 537: <small><b>$lt{'load'}: </b></small> 538: </td> 539: <td align="left" valign="top"> 540: <small><tt> $loadpercent $lt{'perc'}</tt></small> 541: </td> 542: </tr> 543: END 544: } 545: if ($uloadlim) { 546: $userloadrow = <<"END"; 547: <tr> 548: <td align="left" valign="top"> 549: <small><b>$lt{'userload'}: </b></small> 550: </td> 551: <td align="left" valign="top"> 552: <small><tt> $userloadpercent $lt{'perc'}</tt></small> 553: </td> 554: </tr> 555: END 556: } 557: if (($version ne '') && ($version ne '')) { 558: $versionrow = <<"END"; 559: <tr> 560: <td colspan="2" align="left"> 561: <small>$version</small> 562: </td> 563: </tr> 564: END 565: } 566: 567: $r->print(<<ENDDOCUMENT); 568: <div style="float: left;"> 569: <table border="0" cellspacing="0" cellpadding="0"> 570: $domainrow 571: $serverrow 572: $loadrow 573: $userloadrow 574: $versionrow 575: </table> 576: </div> 577: <div style="float: right;"> 578: $domainlogo 579: </div> 580: <br style="clear:both;" /> 581: </div> 582: 583: <script type="text/javascript"> 584: // <![CDATA[ 585: // the if prevents the script error if the browser can not handle this 586: if ( document.client.uname ) { document.client.uname.focus(); } 587: // ]]> 588: </script> 589: $helpdeskscript 590: 591: ENDDOCUMENT 592: my %endargs = ( 'noredirectlink' => 1, ); 593: $r->print(&Apache::loncommon::end_page(\%endargs)); 594: return OK; 595: } 596: 597: sub check_loginvia { 598: my ($domain,$lonhost) = @_; 599: if ($domain eq '' || $lonhost eq '') { 600: return; 601: } 602: my %domconfhash = &Apache::loncommon::get_domainconf($domain); 603: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost}; 604: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost}; 605: my $output; 606: if ($loginvia ne '') { 607: my $noredirect; 608: my $ip = $ENV{'REMOTE_ADDR'}; 609: if ($ip eq '127.0.0.1') { 610: $noredirect = 1; 611: } else { 612: if ($loginvia_exempt ne '') { 613: my @exempt = split(',',$loginvia_exempt); 614: if (grep(/^\Q$ip\E$/,@exempt)) { 615: $noredirect = 1; 616: } 617: } 618: } 619: unless ($noredirect) { 620: my ($newhost,$path); 621: if ($loginvia =~ /:/) { 622: ($newhost,$path) = split(':',$loginvia); 623: } else { 624: $newhost = $loginvia; 625: } 626: if ($newhost ne $lonhost) { 627: if (&Apache::lonnet::hostname($newhost) ne '') { 628: $output = &redirect_page($newhost,$path); 629: } 630: } 631: } 632: } 633: return $output; 634: } 635: 636: sub redirect_page { 637: my ($desthost,$path) = @_; 638: my $protocol = $Apache::lonnet::protocol{$desthost}; 639: $protocol = 'http' if ($protocol ne 'https'); 640: unless ($path =~ m{^/}) { 641: $path = '/'.$path; 642: } 643: my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path; 644: if ($env{'form.firsturl'} ne '') { 645: $url .='?firsturl='.$env{'form.firsturl'}; 646: } 647: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef, 648: {'redirect' => [0,$url],}); 649: my $end_page = &Apache::loncommon::end_page(); 650: return $start_page.$end_page; 651: } 652: 653: sub contactdisplay { 654: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk, 655: $possdoms) = @_; 656: my $contactblock; 657: my $origmail; 658: if (ref($possdoms) eq 'ARRAY') { 659: if (grep(/^\Q$authdomain\E$/,@{$possdoms})) { 660: $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 661: } 662: } 663: my $requestmail = 664: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', 665: $authdomain,$origmail); 666: unless ($showhelpdesk eq '0') { 667: if ($requestmail =~ m/[^\@]+\@[^\@]+/) { 668: $showhelpdesk = 1; 669: } else { 670: $showhelpdesk = 0; 671: } 672: } 673: if ($servadm && $showadminmail) { 674: $contactblock .= $$lt{'servadm'}.':<br />'. 675: '<tt>'.$servadm.'</tt><br />'; 676: } 677: if ($showhelpdesk) { 678: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />'; 679: my $thisurl = &escape('/adm/login'); 680: $$helpdeskscript = <<"ENDSCRIPT"; 681: <script type="text/javascript"> 682: // <![CDATA[ 683: function helpdesk() { 684: var possdom = document.client.udom.value; 685: var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),''); 686: if (codedom == '') { 687: codedom = "$authdomain"; 688: } 689: var querystr = "origurl=$thisurl&codedom="+codedom; 690: document.location.href = "/adm/helpdesk?"+querystr; 691: return; 692: } 693: // ]]> 694: </script> 695: ENDSCRIPT 696: } 697: return $contactblock; 698: } 699: 700: sub forgotpwdisplay { 701: my (%lt) = @_; 702: my $prompt_for_resetpw = 1; 703: if ($prompt_for_resetpw) { 704: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>'; 705: } 706: return; 707: } 708: 709: sub coursecatalog_link { 710: my ($linkname) = @_; 711: return <<"END"; 712: <a href="/adm/coursecatalog">$linkname</a> 713: END 714: } 715: 716: sub newuser_link { 717: my ($linkname) = @_; 718: return '<a href="/adm/createaccount">'.$linkname.'</a>'; 719: } 720: 721: 1; 722: __END__