1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.158.2.2 2015/03/06 22:36:56 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($env{'form.iptoken'});
116: unless ($sessiondata{'sessionserver'}) {
117: my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
118: delete($env{'form.iptoken'});
119: }
120: }
121: # ----------------------------------------------------------- Process Interface
122: $env{'form.interface'}=~s/\W//g;
123:
124: (undef,undef,undef,undef,undef,undef,my $clientmobile) =
125: &Apache::loncommon::decode_user_agent();
126:
127: my $iconpath=
128: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
129:
130: my $lonhost = $r->dir_config('lonHostID');
131: my $domain = &Apache::lonnet::default_login_domain();
132: if ($lonhost ne '') {
133: unless ($sessiondata{'sessionserver'}) {
134: my $redirect = &check_loginvia($domain,$lonhost);
135: if ($redirect) {
136: $r->print($redirect);
137: return OK;
138: }
139: }
140: }
141:
142: if (($sessiondata{'domain'}) &&
143: (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
144: $domain=$sessiondata{'domain'};
145: } elsif (($env{'form.domain'}) &&
146: (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
147: $domain=$env{'form.domain'};
148: }
149:
150: my $role = $r->dir_config('lonRole');
151: my $loadlim = $r->dir_config('lonLoadLim');
152: my $uloadlim= $r->dir_config('lonUserLoadLim');
153: my $servadm = $r->dir_config('lonAdmEMail');
154: my $tabdir = $r->dir_config('lonTabDir');
155: my $include = $r->dir_config('lonIncludes');
156: my $expire = $r->dir_config('lonExpire');
157: my $version = $r->dir_config('lonVersion');
158: my $host_name = &Apache::lonnet::hostname($lonhost);
159:
160: # --------------------------------------------- Default values for login fields
161:
162: my ($authusername,$authdomain);
163: if ($sessiondata{'username'}) {
164: $authusername=$sessiondata{'username'};
165: } else {
166: $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
167: $authusername=($env{'form.username'}?$env{'form.username'}:'');
168: }
169: if ($sessiondata{'domain'}) {
170: $authdomain=$sessiondata{'domain'};
171: } else {
172: $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
173: $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
174: }
175:
176: # ---------------------------------------------------------- Determine own load
177: my $loadavg;
178: {
179: my $loadfile=Apache::File->new('/proc/loadavg');
180: $loadavg=<$loadfile>;
181: }
182: $loadavg =~ s/\s.*//g;
183:
184: my ($loadpercent,$userloadpercent);
185: if ($loadlim) {
186: $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
187: }
188: if ($uloadlim) {
189: $userloadpercent=&Apache::lonnet::userload();
190: }
191:
192: my $firsturl=
193: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
194:
195: # ----------------------------------------------------------- Get announcements
196: my $announcements=&Apache::lonnet::getannounce();
197: # -------------------------------------------------------- Set login parameters
198:
199: my @hexstr=('0','1','2','3','4','5','6','7',
200: '8','9','a','b','c','d','e','f');
201: my $lkey='';
202: for (0..7) {
203: $lkey.=$hexstr[rand(15)];
204: }
205:
206: my $ukey='';
207: for (0..7) {
208: $ukey.=$hexstr[rand(15)];
209: }
210:
211: my $lextkey=hex($lkey);
212: if ($lextkey>2147483647) { $lextkey-=4294967296; }
213:
214: my $uextkey=hex($ukey);
215: if ($uextkey>2147483647) { $uextkey-=4294967296; }
216:
217: # -------------------------------------------------------- Store away log token
218: my $tokenextras;
219: if ($env{'form.role'}) {
220: $tokenextras = '&role='.&escape($env{'form.role'});
221: }
222: if ($env{'form.symb'}) {
223: if (!$tokenextras) {
224: $tokenextras = '&';
225: }
226: $tokenextras .= '&symb='.&escape($env{'form.symb'});
227: }
228: if ($env{'form.iptoken'}) {
229: if (!$tokenextras) {
230: $tokenextras = '&&';
231: }
232: $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
233: }
234: my $logtoken=Apache::lonnet::reply(
235: 'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
236: $lonhost);
237:
238: # -- If we cannot talk to ourselves, or hostID does not map to a hostname
239: # we are in serious trouble
240:
241: if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
242: if ($logtoken eq 'no_such_host') {
243: &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
244: }
245: my $spares='';
246: my $last;
247: foreach my $hostid (sort
248: {
249: &Apache::lonnet::hostname($a) cmp
250: &Apache::lonnet::hostname($b);
251: }
252: keys(%Apache::lonnet::spareid)) {
253: next if ($hostid eq $lonhost);
254: my $hostname = &Apache::lonnet::hostname($hostid);
255: next if (($last eq $hostname) || ($hostname eq ''));
256: $spares.='<br /><font size="+1"><a href="http://'.
257: $hostname.
258: '/adm/login?domain='.$authdomain.'">'.
259: $hostname.'</a>'.
260: ' '.&mt('(preferred)').'</font>'.$/;
261: $last=$hostname;
262: }
263: if ($spares) {
264: $spares.= '<br />';
265: }
266: my %all_hostnames = &Apache::lonnet::all_hostnames();
267: foreach my $hostid (sort
268: {
269: &Apache::lonnet::hostname($a) cmp
270: &Apache::lonnet::hostname($b);
271: }
272: keys(%all_hostnames)) {
273: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
274: my $hostname = &Apache::lonnet::hostname($hostid);
275: next if (($last eq $hostname) || ($hostname eq ''));
276: $spares.='<br /><a href="http://'.
277: $hostname.
278: '/adm/login?domain='.$authdomain.'">'.
279: $hostname.'</a>';
280: $last=$hostname;
281: }
282: $r->print(
283: '<html>'
284: .'<head><title>'
285: .&mt('The LearningOnline Network with CAPA')
286: .'</title></head>'
287: .'<body bgcolor="#FFFFFF">'
288: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
289: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
290: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
291: if ($spares) {
292: $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
293: .'</p>'
294: .$spares);
295: }
296: $r->print('</body>'
297: .'</html>'
298: );
299: return OK;
300: }
301:
302: # ----------------------------------------------- Apparently we are in business
303: $servadm=~s/\,/\<br \/\>/g;
304:
305: # ----------------------------------------------------------- Front page design
306: my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
307: my $font=&Apache::loncommon::designparm('login.font',$domain);
308: my $link=&Apache::loncommon::designparm('login.link',$domain);
309: my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
310: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
311: my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
312: my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
313: my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
314: my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
315: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
316: my $img=&Apache::loncommon::designparm('login.img',$domain);
317: my $domainlogo=&Apache::loncommon::domainlogo($domain);
318: my $showbanner = 1;
319: my $showmainlogo = 1;
320: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
321: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
322: }
323: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
324: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
325: }
326: my $showadminmail;
327: my @possdoms = &Apache::lonnet::current_machine_domains();
328: if (grep(/^\Q$domain\E$/,@possdoms)) {
329: $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
330: }
331: my $showcoursecat =
332: &Apache::loncommon::designparm('login.coursecatalog',$domain);
333: my $shownewuserlink =
334: &Apache::loncommon::designparm('login.newuser',$domain);
335: my $showhelpdesk =
336: &Apache::loncommon::designparm('login.helpdesk',$domain);
337: my $now=time;
338: my $js = (<<ENDSCRIPT);
339:
340: <script type="text/javascript" language="JavaScript">
341: // <![CDATA[
342: function send()
343: {
344: this.document.server.elements.uname.value
345: =this.document.client.elements.uname.value;
346:
347: this.document.server.elements.udom.value
348: =this.document.client.elements.udom.value;
349:
350: uextkey=this.document.client.elements.uextkey.value;
351: lextkey=this.document.client.elements.lextkey.value;
352: initkeys();
353:
354: this.document.server.elements.upass0.value
355: =crypted(this.document.client.elements.upass$now.value.substr(0,15));
356: this.document.server.elements.upass1.value
357: =crypted(this.document.client.elements.upass$now.value.substr(15,15));
358: this.document.server.elements.upass2.value
359: =crypted(this.document.client.elements.upass$now.value.substr(30,15));
360:
361: this.document.client.elements.uname.value='';
362: this.document.client.elements.upass$now.value='';
363:
364: this.document.server.submit();
365: return false;
366: }
367:
368: function enableInput() {
369: this.document.client.elements.upass$now.removeAttribute("readOnly");
370: this.document.client.elements.uname.removeAttribute("readOnly");
371: this.document.client.elements.udom.removeAttribute("readOnly");
372: return;
373: }
374:
375: // ]]>
376: </script>
377:
378: ENDSCRIPT
379:
380: # --------------------------------------------------- Print login screen header
381:
382: my %add_entries = (
383: bgcolor => "$mainbg",
384: text => "$font",
385: link => "$link",
386: vlink => "$vlink",
387: alink => "$alink",
388: onload => 'javascript:enableInput();',);
389:
390: my %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
391: my $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost};
392: my $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost};
393: if ($headextra) {
394: my $omitextra;
395: if ($headextra_exempt ne '') {
396: my @exempt = split(',',$headextra_exempt);
397: my $ip = $ENV{'REMOTE_ADDR'};
398: if (grep(/^\Q$ip\E$/,@exempt)) {
399: $omitextra = 1;
400: }
401: }
402: unless ($omitextra) {
403: my $confname = $defdom.'-domainconfig';
404: if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost/\E}) {
405: my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
406: unless ($extra eq '-1') {
407: $js .= "\n".$extra."\n";
408: }
409: }
410: }
411: }
412:
413: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
414: { 'redirect' => [$expire,'/adm/roles'],
415: 'add_entries' => \%add_entries,
416: 'only_body' => 1,}));
417:
418: # ----------------------------------------------------------------------- Texts
419:
420: my %lt=&Apache::lonlocal::texthash(
421: 'un' => 'Username',
422: 'pw' => 'Password',
423: 'dom' => 'Domain',
424: 'perc' => 'percent',
425: 'load' => 'Server Load',
426: 'userload' => 'User Load',
427: 'catalog' => 'Course/Community Catalog',
428: 'log' => 'Log in',
429: 'help' => 'Log-in Help',
430: 'serv' => 'Server',
431: 'servadm' => 'Server Administration',
432: 'helpdesk' => 'Contact Helpdesk',
433: 'forgotpw' => 'Forgot password?',
434: 'newuser' => 'New User?',
435: );
436: # -------------------------------------------------- Change password field name
437:
438: my $forgotpw = &forgotpwdisplay(%lt);
439: $forgotpw .= '<br />' if $forgotpw;
440: my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
441: if ($loginhelp) {
442: $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
443: }
444:
445: # ---------------------------------------------------- Serve out DES JavaScript
446: {
447: my $jsh=Apache::File->new($include."/londes.js");
448: $r->print(<$jsh>);
449: }
450: # ---------------------------------------------------------- Serve rest of page
451:
452: $r->print(
453: '<div class="LC_Box"'
454: .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
455: );
456:
457: $r->print(<<ENDSERVERFORM);
458: <form name="server" action="/adm/authenticate" method="post" target="_top">
459: <input type="hidden" name="logtoken" value="$logtoken" />
460: <input type="hidden" name="serverid" value="$lonhost" />
461: <input type="hidden" name="uname" value="" />
462: <input type="hidden" name="upass0" value="" />
463: <input type="hidden" name="upass1" value="" />
464: <input type="hidden" name="upass2" value="" />
465: <input type="hidden" name="udom" value="" />
466: <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
467: <input type="hidden" name="localres" value="$env{'form.localres'}" />
468: </form>
469: ENDSERVERFORM
470: my $coursecatalog;
471: if (($showcoursecat eq '') || ($showcoursecat)) {
472: $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
473: }
474: my $newuserlink;
475: if ($shownewuserlink) {
476: $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
477: }
478: my $logintitle =
479: '<h2 class="LC_hcell"'
480: .' style="background:'.$loginbox_header_bgcol.';'
481: .' color:'.$loginbox_header_textcol.'">'
482: .$lt{'log'}
483: .'</h2>';
484:
485: my $noscript_warning='<noscript><span class="LC_warning"><b>'
486: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
487: .'</b></span></noscript>';
488: my $helpdeskscript;
489: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
490: $authdomain,\$helpdeskscript,
491: $showhelpdesk,\@possdoms);
492:
493: my $mobileargs;
494: if ($clientmobile) {
495: $mobileargs = 'autocapitalize="off" autocorrect="off"';
496: }
497: my $loginform=(<<LFORM);
498: <form name="client" action="" onsubmit="return(send())">
499: <input type="hidden" name="lextkey" value="$lextkey" />
500: <input type="hidden" name="uextkey" value="$uextkey" />
501: <b><label for="uname">$lt{'un'}</label>:</b><br />
502: <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
503: <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
504: <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
505: <b><label for="udom">$lt{'dom'}</label>:</b><br />
506: <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
507: <input type="submit" value="$lt{'log'}" />
508: </form>
509: LFORM
510:
511: if ($showbanner) {
512: $r->print(<<HEADER);
513: <!-- The LON-CAPA Header -->
514: <div style="background:$pgbg;margin:0;width:100%;">
515: <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
516: </div>
517: HEADER
518: }
519: $r->print(<<ENDTOP);
520: <div style="float:left;margin-top:0;">
521: <div class="LC_Box" style="background:$loginbox_bg;">
522: $logintitle
523: $loginform
524: $noscript_warning
525: </div>
526:
527: <div class="LC_Box" style="padding-top: 10px;">
528: $loginhelp
529: $forgotpw
530: $contactblock
531: $newuserlink
532: $coursecatalog
533: </div>
534: </div>
535:
536: <div>
537: ENDTOP
538: if ($showmainlogo) {
539: $r->print(' <img src="'.$logo.'" alt="" />'."\n");
540: }
541: $r->print(<<ENDTOP);
542: $announcements
543: </div>
544: <hr style="clear:both;" />
545: ENDTOP
546: my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
547: $domainrow = <<"END";
548: <tr>
549: <td align="left" valign="top">
550: <small><b>$lt{'dom'}: </b></small>
551: </td>
552: <td align="left" valign="top">
553: <small><tt> $domain</tt></small>
554: </td>
555: </tr>
556: END
557: $serverrow = <<"END";
558: <tr>
559: <td align="left" valign="top">
560: <small><b>$lt{'serv'}: </b></small>
561: </td>
562: <td align="left" valign="top">
563: <small><tt> $lonhost ($role)</tt></small>
564: </td>
565: </tr>
566: END
567: if ($loadlim) {
568: $loadrow = <<"END";
569: <tr>
570: <td align="left" valign="top">
571: <small><b>$lt{'load'}: </b></small>
572: </td>
573: <td align="left" valign="top">
574: <small><tt> $loadpercent $lt{'perc'}</tt></small>
575: </td>
576: </tr>
577: END
578: }
579: if ($uloadlim) {
580: $userloadrow = <<"END";
581: <tr>
582: <td align="left" valign="top">
583: <small><b>$lt{'userload'}: </b></small>
584: </td>
585: <td align="left" valign="top">
586: <small><tt> $userloadpercent $lt{'perc'}</tt></small>
587: </td>
588: </tr>
589: END
590: }
591: if (($version ne '') && ($version ne '<!-- VERSION -->')) {
592: $versionrow = <<"END";
593: <tr>
594: <td colspan="2" align="left">
595: <small>$version</small>
596: </td>
597: </tr>
598: END
599: }
600:
601: $r->print(<<ENDDOCUMENT);
602: <div style="float: left;">
603: <table border="0" cellspacing="0" cellpadding="0">
604: $domainrow
605: $serverrow
606: $loadrow
607: $userloadrow
608: $versionrow
609: </table>
610: </div>
611: <div style="float: right;">
612: $domainlogo
613: </div>
614: <br style="clear:both;" />
615: </div>
616:
617: <script type="text/javascript">
618: // <![CDATA[
619: // the if prevents the script error if the browser can not handle this
620: if ( document.client.uname ) { document.client.uname.focus(); }
621: // ]]>
622: </script>
623: $helpdeskscript
624:
625: ENDDOCUMENT
626: my %endargs = ( 'noredirectlink' => 1, );
627: $r->print(&Apache::loncommon::end_page(\%endargs));
628: return OK;
629: }
630:
631: sub check_loginvia {
632: my ($domain,$lonhost) = @_;
633: if ($domain eq '' || $lonhost eq '') {
634: return;
635: }
636: my %domconfhash = &Apache::loncommon::get_domainconf($domain);
637: my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
638: my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
639: my $output;
640: if ($loginvia ne '') {
641: my $noredirect;
642: my $ip = $ENV{'REMOTE_ADDR'};
643: if ($ip eq '127.0.0.1') {
644: $noredirect = 1;
645: } else {
646: if ($loginvia_exempt ne '') {
647: my @exempt = split(',',$loginvia_exempt);
648: if (grep(/^\Q$ip\E$/,@exempt)) {
649: $noredirect = 1;
650: }
651: }
652: }
653: unless ($noredirect) {
654: my ($newhost,$path);
655: if ($loginvia =~ /:/) {
656: ($newhost,$path) = split(':',$loginvia);
657: } else {
658: $newhost = $loginvia;
659: }
660: if ($newhost ne $lonhost) {
661: if (&Apache::lonnet::hostname($newhost) ne '') {
662: $output = &redirect_page($newhost,$path);
663: }
664: }
665: }
666: }
667: return $output;
668: }
669:
670: sub redirect_page {
671: my ($desthost,$path) = @_;
672: my $protocol = $Apache::lonnet::protocol{$desthost};
673: $protocol = 'http' if ($protocol ne 'https');
674: unless ($path =~ m{^/}) {
675: $path = '/'.$path;
676: }
677: my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
678: if ($env{'form.firsturl'} ne '') {
679: $url .='?firsturl='.$env{'form.firsturl'};
680: }
681: my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
682: {'redirect' => [0,$url],});
683: my $end_page = &Apache::loncommon::end_page();
684: return $start_page.$end_page;
685: }
686:
687: sub contactdisplay {
688: my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk,
689: $possdoms) = @_;
690: my $contactblock;
691: my $origmail;
692: if (ref($possdoms) eq 'ARRAY') {
693: if (grep(/^\Q$authdomain\E$/,@{$possdoms})) {
694: $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
695: }
696: }
697: my $requestmail =
698: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
699: $authdomain,$origmail);
700: unless ($showhelpdesk eq '0') {
701: if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
702: $showhelpdesk = 1;
703: } else {
704: $showhelpdesk = 0;
705: }
706: }
707: if ($servadm && $showadminmail) {
708: $contactblock .= $$lt{'servadm'}.':<br />'.
709: '<tt>'.$servadm.'</tt><br />';
710: }
711: if ($showhelpdesk) {
712: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
713: my $thisurl = &escape('/adm/login');
714: $$helpdeskscript = <<"ENDSCRIPT";
715: <script type="text/javascript">
716: // <![CDATA[
717: function helpdesk() {
718: var possdom = document.client.udom.value;
719: var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
720: if (codedom == '') {
721: codedom = "$authdomain";
722: }
723: var querystr = "origurl=$thisurl&codedom="+codedom;
724: document.location.href = "/adm/helpdesk?"+querystr;
725: return;
726: }
727: // ]]>
728: </script>
729: ENDSCRIPT
730: }
731: return $contactblock;
732: }
733:
734: sub forgotpwdisplay {
735: my (%lt) = @_;
736: my $prompt_for_resetpw = 1;
737: if ($prompt_for_resetpw) {
738: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
739: }
740: return;
741: }
742:
743: sub coursecatalog_link {
744: my ($linkname) = @_;
745: return <<"END";
746: <a href="/adm/coursecatalog">$linkname</a>
747: END
748: }
749:
750: sub newuser_link {
751: my ($linkname) = @_;
752: return '<a href="/adm/createaccount">'.$linkname.'</a>';
753: }
754:
755: 1;
756: __END__
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