1: # The LearningOnline Network
2: # Login Screen
3: #
4: # $Id: lonlogin.pm,v 1.115 2009/03/16 18:10:05 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: $ENV{'REDIRECT_QUERY_STRING'}),
48: ['interface','username','domain','firsturl','localpath','localres',
49: 'token']);
50: if (!defined($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 ($handle=~/^publicuser\_/) {
76: # For "public user" - remove it, we apparently really want to login
77: unlink($r->dir_config('lonIDsDir')."/$handle.id");
78: } elsif ($handle ne '') {
79: # Indeed, a valid token is found
80: my $start_page =
81: &Apache::loncommon::start_page('Already logged in');
82: my $end_page =
83: &Apache::loncommon::end_page();
84: $r->print(
85: $start_page
86: .'<h1>'.&mt('You are already logged in!').'</h1>'
87: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]logout[_4].',
88: '<a href="/adm/roles">','</a>','<a href="/adm/logout">','</a>').'</p>'
89: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
90: .$end_page
91: );
92: return OK;
93: }
94:
95: # ---------------------------------------------------- No valid token, continue
96:
97: # ---------------------------- Not possible to really login to domain "public"
98: if ($env{'form.domain'} eq 'public') {
99: $env{'form.domain'}='';
100: $env{'form.username'}='';
101: }
102: # ----------------------------------------------------------- Process Interface
103: $env{'form.interface'}=~s/\W//g;
104:
105: my $httpbrowser=$ENV{"HTTP_USER_AGENT"};
106:
107: my $fullgraph=($env{'form.interface'} ne 'textual');
108:
109: my $iconpath=
110: &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
111:
112: my $domain = &Apache::lonnet::default_login_domain();
113: if (($env{'form.domain'}) &&
114: (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
115: $domain=$env{'form.domain'};
116: }
117: my $role = $r->dir_config('lonRole');
118: my $loadlim = $r->dir_config('lonLoadLim');
119: my $servadm = $r->dir_config('lonAdmEMail');
120: my $lonhost = $r->dir_config('lonHostID');
121: my $tabdir = $r->dir_config('lonTabDir');
122: my $include = $r->dir_config('lonIncludes');
123: my $expire = $r->dir_config('lonExpire');
124: my $version = $r->dir_config('lonVersion');
125: my $host_name = &Apache::lonnet::hostname($lonhost);
126:
127: # --------------------------------------------- Default values for login fields
128:
129: my $authusername=($env{'form.username'}?$env{'form.username'}:'');
130: my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
131:
132: # ---------------------------------------------------------- Determine own load
133: my $loadavg;
134: {
135: my $loadfile=Apache::File->new('/proc/loadavg');
136: $loadavg=<$loadfile>;
137: }
138: $loadavg =~ s/\s.*//g;
139: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
140: my $userloadpercent=&Apache::lonnet::userload();
141:
142: # ------------------------------------------------------- Do the load balancing
143: my $otherserver= &Apache::lonnet::absolute_url($host_name);
144: my $firsturl=
145: ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
146: # ---------------------------------------------------------- Are we overloaded?
147: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
148: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);
149: if ($unloaded) { $otherserver=$unloaded; }
150: }
151:
152: # ----------------------------------------------------------- Get announcements
153: my $announcements=&Apache::lonnet::getannounce();
154: # -------------------------------------------------------- Set login parameters
155:
156: my @hexstr=('0','1','2','3','4','5','6','7',
157: '8','9','a','b','c','d','e','f');
158: my $lkey='';
159: for (0..7) {
160: $lkey.=$hexstr[rand(15)];
161: }
162:
163: my $ukey='';
164: for (0..7) {
165: $ukey.=$hexstr[rand(15)];
166: }
167:
168: my $lextkey=hex($lkey);
169: if ($lextkey>2147483647) { $lextkey-=4294967296; }
170:
171: my $uextkey=hex($ukey);
172: if ($uextkey>2147483647) { $uextkey-=4294967296; }
173:
174: # -------------------------------------------------------- Store away log token
175: my $logtoken=Apache::lonnet::reply(
176: 'tmpput:'.$ukey.$lkey.'&'.$firsturl,
177: $lonhost);
178:
179: # ------------------- If we cannot talk to ourselves, we are in serious trouble
180:
181: if ($logtoken eq 'con_lost') {
182: my $spares='';
183: my $last;
184: foreach my $hostid (sort
185: {
186: &Apache::lonnet::hostname($a) cmp
187: &Apache::lonnet::hostname($b);
188: }
189: keys(%Apache::lonnet::spareid)) {
190: next if ($hostid eq $lonhost);
191: my $hostname = &Apache::lonnet::hostname($hostid);
192: next if ($last eq $hostname);
193: $spares.='<br /><font size="+1"><a href="http://'.
194: $hostname.
195: '/adm/login?domain='.$authdomain.'">'.
196: $hostname.'</a>'.
197: ' '.&mt('(preferred)').'</font>'.$/;
198: $last=$hostname;
199: }
200: $spares.= '<br />';
201: my %all_hostnames = &Apache::lonnet::all_hostnames();
202: foreach my $hostid (sort
203: {
204: &Apache::lonnet::hostname($a) cmp
205: &Apache::lonnet::hostname($b);
206: }
207: keys(%all_hostnames)) {
208: next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
209: my $hostname = &Apache::lonnet::hostname($hostid);
210: next if ($last eq $hostname);
211: $spares.='<br /><a href="http://'.
212: $hostname.
213: '/adm/login?domain='.$authdomain.'">'.
214: $hostname.'</a>';
215: $last=$hostname;
216: }
217: $r->print(
218: '<html>'
219: .'<head><title>'
220: .&mt('The LearningOnline Network with CAPA')
221: .'</title></head>'
222: .'<body bgcolor="#FFFFFF">'
223: .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
224: .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
225: .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'
226: .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'
227: .$spares
228: .'</body>'
229: .'</html>'
230: );
231: return OK;
232: }
233:
234: # ----------------------------------------------- Apparently we are in business
235: $servadm=~s/\,/\<br \/\>/g;
236:
237: # ----------------------------------------------------------- Front page design
238: my $pgbg=
239: ($fullgraph?&Apache::loncommon::designparm('login.pgbg',$domain):'#FFFFFF');
240: my $font=
241: ($fullgraph?&Apache::loncommon::designparm('login.font',$domain):'#000000');
242: my $link=
243: ($fullgraph?&Apache::loncommon::designparm('login.link',$domain):'#0000FF');
244: my $vlink=
245: ($fullgraph?&Apache::loncommon::designparm('login.vlink',$domain):'#0000FF');
246: my $alink=&Apache::loncommon::designparm('login.alink',$domain);
247: my $mainbg=
248: ($fullgraph?&Apache::loncommon::designparm('login.mainbg',$domain):'#FFFFFF');
249: my $logo=&Apache::loncommon::designparm('login.logo',$domain);
250: my $img=&Apache::loncommon::designparm('login.img',$domain);
251: my $domainlogo=&Apache::loncommon::domainlogo($domain);
252: my $login=&Apache::loncommon::designparm('login.login',$domain);
253: if ($login eq '') {
254: $login = $iconpath.'/'.&mt('userauthentication.gif');
255: }
256: my $showbanner = 1;
257: my $showmainlogo = 1;
258: if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
259: $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
260: }
261: if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
262: $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
263: }
264: my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
265: my $showcoursecat =
266: &Apache::loncommon::designparm('login.coursecatalog',$domain);
267: my $loginheader =&Apache::loncommon::designparm('login.loginheader',$domain);
268: my $shownewuserlink =
269: &Apache::loncommon::designparm('login.newuser',$domain);
270: my $now=time;
271: my $js = (<<ENDSCRIPT);
272:
273: <script language="JavaScript">
274: function send()
275: {
276: this.document.server.elements.uname.value
277: =this.document.client.elements.uname.value;
278:
279: this.document.server.elements.udom.value
280: =this.document.client.elements.udom.value;
281:
282: uextkey=this.document.client.elements.uextkey.value;
283: lextkey=this.document.client.elements.lextkey.value;
284: initkeys();
285:
286: this.document.server.elements.upass0.value
287: =crypted(this.document.client.elements.upass$now.value.substr(0,15));
288: this.document.server.elements.upass1.value
289: =crypted(this.document.client.elements.upass$now.value.substr(15,15));
290: this.document.server.elements.upass2.value
291: =crypted(this.document.client.elements.upass$now.value.substr(30,15));
292:
293: this.document.client.elements.uname.value='';
294: this.document.client.elements.upass$now.value='';
295:
296: this.document.server.submit();
297: return false;
298: }
299: </script>
300:
301: ENDSCRIPT
302:
303: # --------------------------------------------------- Print login screen header
304:
305: my %add_entries = (topmargin => "0",
306: leftmargin => "0",
307: marginheight => "0",
308: marginwidth => "0",
309: bgcolor => "$mainbg",
310: text => "$font",
311: link => "$link",
312: vlink => "$vlink",
313: alink => "$alink",);
314:
315: $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
316: { 'redirect' => [$expire,'/adm/roles'],
317: 'add_entries' => \%add_entries,
318: 'only_body' => 1,}));
319:
320: # ----------------------------------------------------------------------- Texts
321:
322: my %lt=&Apache::lonlocal::texthash(
323: 'un' => 'Username',
324: 'pw' => 'Password',
325: 'dom' => 'Domain',
326: 'perc' => 'percent',
327: 'load' => 'Server Load',
328: 'userload' => 'User Load',
329: 'about' => 'About LON-CAPA',
330: 'catalog' => 'Course Catalog',
331: 'log' => 'Log in',
332: 'help' => 'Log-in Help',
333: 'serv' => 'Server',
334: 'servadm' => 'Server Administration',
335: 'helpdesk' => 'Contact Helpdesk',
336: 'forgotpw' => 'Forgot password?',
337: 'newuser' => 'New User?',
338: );
339: # -------------------------------------------------- Change password field name
340: my $forgotpw = &forgotpwdisplay(%lt);
341: my $loginhelp = &loginhelpdisplay(%lt);
342:
343: # ---------------------------------------------------- Serve out DES JavaScript
344: {
345: my $jsh=Apache::File->new($include."/londes.js");
346: $r->print(<$jsh>);
347: }
348: # ---------------------------------------------------------- Serve rest of page
349:
350: if ($fullgraph) {
351: $r->print(
352: '<div class="LC_loginpage_container">');
353: }
354:
355: $r->print(<<ENDSERVERFORM);
356: <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">
357: <input type="hidden" name="logtoken" value="$logtoken" />
358: <input type="hidden" name="serverid" value="$lonhost" />
359: <input type="hidden" name="uname" value="" />
360: <input type="hidden" name="upass0" value="" />
361: <input type="hidden" name="upass1" value="" />
362: <input type="hidden" name="upass2" value="" />
363: <input type="hidden" name="udom" value="" />
364: <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
365: <input type="hidden" name="localres" value="$env{'form.localres'}" />
366: </form>
367: ENDSERVERFORM
368: my $coursecatalog;
369: if (($showcoursecat eq '') || ($showcoursecat)) {
370: $coursecatalog = &coursecatalog_link($lt{'catalog'});
371: }
372: my $newuserlink;
373: if ($shownewuserlink) {
374: $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
375: }
376: my $logintitle;
377: if ($loginheader eq 'text') {
378: $logintitle ='<h2>'.$lt{'log'}.'</h2>';
379: } else {
380: $logintitle = '<img src="'.$login.'" alt="'.
381: &mt('User Authentication').'" />';
382: }
383:
384: my $noscript_warning='<noscript><span class="LC_warning"><b>'
385: .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
386: .'</b></span></noscript>';
387: my $helpdeskscript;
388: my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
389: $version,$authdomain,\$helpdeskscript);
390:
391: my $loginform=(<<LFORM);
392: <form name="client" onsubmit="return(send())">
393: <input type="hidden" name="lextkey" value="$lextkey" />
394: <input type="hidden" name="uextkey" value="$uextkey" />
395: <b><label for="uname">$lt{'un'}</label>:</b><br />
396: <input type="text" name="uname" size="15" value="$authusername" /><br />
397: <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
398: <input type="password" name="upass$now" size="15" /><br />
399: <b><label for="udom">$lt{'dom'}</label>:</b><br />
400: <input type="text" name="udom" size="15" value="$authdomain" /><br />
401: <input type="submit" value="$lt{'log'}" />
402: </form>
403: LFORM
404:
405: if ($fullgraph) {
406: if ($showbanner) {
407: $r->print(<<HEADER);
408: <!-- The LON-CAPA Header -->
409: <table border="0" align="left" width="100%" cellspacing="0" cellpadding="1">
410: <tr>
411: <td align="left" valign="top" bgcolor="$pgbg">
412: <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
413: </td>
414: </tr>
415: </table>
416: HEADER
417: }
418: if ($showmainlogo) {
419: $r->print('<div class="LC_loginpage_space"> </div>'."\n".
420: ' <img src="'.$logo.'" alt="" />'."\n");
421: }
422: $r->print(<<ENDTOP);
423: <div class="LC_loginpage_loginDomain">$domainlogo</div>
424: <div class="LC_loginpage_loginContainer">
425: $logintitle
426: <table border="0" align="left" cellspacing="1" cellpadding="2" width="100%">
427: <tr>
428: <td>
429: $loginform
430: </td>
431: </tr>
432: </table>
433: $noscript_warning
434: </div>
435:
436: <div class="LC_loginpage_loginInfo">
437: $loginhelp<br />
438: $forgotpw<br />
439: $contactblock<br />
440: $newuserlink
441: $coursecatalog<br /><br />
442: <a href="/adm/about.html"><b>$lt{'about'}</b></a>
443: </div>
444:
445: <div class="LC_loginpage_space"> </div>
446: $announcements
447: ENDTOP
448: }
449:
450: if($announcements){$r->print('<div class="LC_loginpage_space"> </div>');}
451:
452: if ($fullgraph) {
453: $r->print(<<ENDDOCUMENT);
454: <table border="0" cellspacing="0" cellpadding="0">
455: <tr>
456: <td align="left" valign="top">
457: <small><b> $lt{'dom'}: </b></small>
458: </td>
459: <td align="left" valign="top">
460: <small><tt> $domain</tt></small>
461: </td>
462: </tr>
463: <tr>
464: <td align="left" valign="top">
465: <small><b> $lt{'serv'}: </b></small>
466: </td>
467: <td align="left" valign="top">
468: <small><tt> $lonhost ($role)</tt></small>
469: </td>
470: </tr>
471: <tr>
472: <td align="left" valign="top">
473: <small><b> $lt{'load'}: </b></small>
474: </td>
475: <td align="left" valign="top">
476: <small><tt> $loadpercent $lt{'perc'}</tt></small>
477: </td>
478: </tr>
479: <tr>
480: <td align="left" valign="top">
481: <small><b> $lt{'userload'}: </b></small>
482: </td>
483: <td align="left" valign="top">
484: <small><tt> $userloadpercent $lt{'perc'}</tt></small>
485: </td>
486: </tr>
487: </table>
488: </div>
489:
490: <script type="text/javascript">
491: // the if prevents the script error if the browser can not handle this
492: if ( document.client.uname ) { document.client.uname.focus(); }
493: </script>
494: $helpdeskscript
495:
496: ENDDOCUMENT
497: }
498: my %endargs = ( 'noredirectlink' => 1, );
499: $r->print(&Apache::loncommon::end_page(\%endargs));
500: return OK;
501: }
502:
503: sub contactdisplay {
504: my ($lt,$servadm,$showadminmail,$version,$authdomain,$helpdeskscript) = @_;
505: my $contactblock;
506: my $showhelpdesk = 0;
507: my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
508: if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {
509: $showhelpdesk = 1;
510: }
511: if ($servadm && $showadminmail) {
512: $contactblock .= '<b> '.$$lt{'servadm'}.':</b><br />'.
513: '<tt> '.$servadm.'</tt><br /> <br />';
514: }
515: if ($showhelpdesk) {
516: $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
517: my $thisurl = &escape('/adm/login');
518: $$helpdeskscript = <<"ENDSCRIPT";
519: <script type="text/javascript">
520: function helpdesk() {
521: var codedom = document.client.udom.value;
522: if (codedom == '') {
523: codedom = "$authdomain";
524: }
525: var querystr = "origurl=$thisurl&codedom="+codedom;
526: document.location.href = "/adm/helpdesk?"+querystr;
527: return;
528: }
529: </script>
530: ENDSCRIPT
531: }
532: $contactblock .= <<"ENDBLOCK";
533: $version
534: ENDBLOCK
535: return $contactblock;
536: }
537:
538: sub forgotpwdisplay {
539: my (%lt) = @_;
540: my $prompt_for_resetpw = 1;
541: if ($prompt_for_resetpw) {
542: return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
543: }
544: return;
545: }
546:
547: sub loginhelpdisplay {
548: my (%lt) = @_;
549: my $login_help = 1;
550: if ($login_help) {
551: return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';
552: }
553: return;
554: }
555:
556: sub coursecatalog_link {
557: my ($linkname) = @_;
558: return <<"END";
559: <a href="/adm/coursecatalog">$linkname</a>
560: END
561: }
562:
563: sub newuser_link {
564: my ($linkname) = @_;
565: return ' <a href="/adm/createaccount"><b>'.$linkname.'</b></a><br />';
566: }
567:
568: 1;
569: __END__
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