Annotation of loncom/auth/lonauth.pm, revision 1.101.8.8
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.101.8.8! raeburn 4: # $Id: lonauth.pm,v 1.101.8.7 2011/09/27 20:18:45 raeburn Exp $
1.27 www 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: #
1.1 albertel 28:
29: package Apache::lonauth;
30:
1.18 albertel 31: use strict;
1.78 albertel 32: use LONCAPA;
1.1 albertel 33: use Apache::Constants qw(:common);
34: use CGI qw(:standard);
1.26 harris41 35: use DynaLoader; # for Crypt::DES version
1.8 www 36: use Crypt::DES;
1.45 matthew 37: use Apache::loncommon();
1.66 albertel 38: use Apache::lonnet;
1.12 www 39: use Apache::lonmenu();
1.90 raeburn 40: use Apache::createaccount;
1.18 albertel 41: use Fcntl qw(:flock);
1.56 www 42: use Apache::lonlocal;
1.101.8.8! raeburn 43: use Apache::File();
1.101 raeburn 44: use HTML::Entities;
1.85 albertel 45:
1.1 albertel 46: # ------------------------------------------------------------ Successful login
1.85 albertel 47: sub success {
48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
49: $form) = @_;
1.1 albertel 50:
1.85 albertel 51: # ------------------------------------------------------------ Get cookie ready
52: my $cookie =
53: &Apache::loncommon::init_user_environment($r, $username, $domain,
54: $authhost, $form,
1.86 albertel 55: {'extra_env' => $extra_env,});
1.4 www 56:
1.69 albertel 57: my $public=($username eq 'public' && $domain eq 'public');
58:
1.85 albertel 59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
1.78 albertel 60:
1.7 www 61: # -------------------------------------------------------------------- Log this
62:
63: &Apache::lonnet::log($domain,$username,$authhost,
64: "Login $ENV{'REMOTE_ADDR'}");
1.4 www 65:
1.14 www 66: # ------------------------------------------------- Check for critical messages
67:
1.21 www 68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
1.14 www 69: if ($what[0]) {
1.22 www 70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
1.21 www 71: $lowerurl='/adm/email?critical=display';
1.14 www 72: }
73: }
74:
1.5 www 75: # ------------------------------------------------------------ Get cookie ready
1.1 albertel 76: $cookie="lonID=$cookie; path=/";
1.12 www 77: # -------------------------------------------------------- Menu script and info
1.100 raeburn 78: my $destination = $lowerurl;
79:
80: if (defined($form->{role})) {
81: my $envkey = 'user.role.'.$form->{role};
82: my $now=time;
83: my $then=$env{'user.login.time'};
84: my $refresh=$env{'user.refresh.time'};
85: if (exists($env{$envkey})) {
86: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
87: &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
88: \$trolecode,\$tstatus,\$tstart,\$tend);
89: if ($tstatus eq 'is') {
1.101 raeburn 90: $destination .= ($destination =~ /\?/) ? '&' : '?';
91: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
92: $destination .= 'selectrole=1&'.$newrole.'=1';
1.100 raeburn 93: }
94: }
95: }
1.101 raeburn 96: if (defined($form->{symb})) {
97: my $destsymb = $form->{symb};
98: $destination .= ($destination =~ /\?/) ? '&' : '?';
99: if ($destsymb =~ /___/) {
100: # FIXME Need to deal with encrypted symbs and urls as needed.
101: my ($map,$resid,$desturl)=split(/___/,$destsymb);
102: unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
103: $desturl = &Apache::lonnet::clutter($desturl);
104: }
105: $desturl = &HTML::Entities::encode($desturl,'"<>&');
106: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
107: $destination .= '&destinationurl='.$desturl.
108: '&destsymb='.$destsymb;
109: } else {
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
111: $destination .= '&destinationurl='.$destsymb;
112: }
113: }
1.100 raeburn 114:
1.85 albertel 115: my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
1.100 raeburn 116: my $startupremote=&Apache::lonmenu::startupremote($destination);
1.63 albertel 117: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
1.35 www 118: my $setflags=&Apache::lonmenu::setflags();
119: my $maincall=&Apache::lonmenu::maincall();
1.99 bisitz 120: my $brcrum = [{'href' => '',
121: 'text' => 'Successful Login'},];
1.74 albertel 122: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.99 bisitz 123: $startupremote,
124: {'no_inline_link' => 1,
125: 'bread_crumbs' => $brcrum,});
1.74 albertel 126: my $end_page =&Apache::loncommon::end_page();
127:
1.64 albertel 128: my $continuelink;
1.98 www 129: if ($env{'environment.remote'} eq 'off') {
1.100 raeburn 130: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
1.64 albertel 131: }
1.5 www 132: # ------------------------------------------------- Output for successful login
133:
1.74 albertel 134: &Apache::loncommon::content_type($r,'text/html');
135: $r->header_out('Set-cookie' => $cookie);
136: $r->send_http_header;
1.1 albertel 137:
1.58 www 138: my %lt=&Apache::lonlocal::texthash(
139: 'wel' => 'Welcome',
1.92 bisitz 140: 'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
141: 'pro' => 'Login problems?',
1.58 www 142: 'log' => 'loginproblems.html',
143: );
1.1 albertel 144: $r->print(<<ENDSUCCESS);
1.74 albertel 145: $start_page
1.35 www 146: $setflags
1.19 www 147: $windowinfo
1.58 www 148: <h1>$lt{'wel'}</h1>
1.92 bisitz 149: $lt{'mes'}<p>
150: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
1.63 albertel 151: $remoteinfo
1.35 www 152: $maincall
1.64 albertel 153: $continuelink
1.74 albertel 154: $end_page
1.1 albertel 155: ENDSUCCESS
156: }
157:
158: # --------------------------------------------------------------- Failed login!
159:
160: sub failed {
1.85 albertel 161: my ($r,$message,$form) = @_;
1.76 albertel 162: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
163: {'no_inline_link' => 1,});
1.100 raeburn 164: my $retry = '/adm/login?username='.$form->{'uname'}.
165: '&domain='.$form->{'udom'};
166: if (exists($form->{role})) {
167: $retry .= '&role='.$form->{role};
168: }
169: if (exists($form->{symb})) {
170: $retry .= '&symb='.$form->{symb};
171: }
1.74 albertel 172: my $end_page = &Apache::loncommon::end_page();
173: &Apache::loncommon::content_type($r,'text/html');
174: $r->send_http_header;
1.92 bisitz 175: $r->print(
176: $start_page
177: .'<h1>'.&mt('Sorry ...').'</h1>'
1.95 bisitz 178: .'<p class="LC_warning">'.&mt($message).'</p>'
1.100 raeburn 179: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92 bisitz 180: .'</p>'
181: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
182: .$end_page
183: );
184: }
1.60 www 185:
1.55 www 186: # ------------------------------------------------------------------ Rerouting!
187:
188: sub reroute {
1.74 albertel 189: my ($r) = @_;
190: &Apache::loncommon::content_type($r,'text/html');
191: $r->send_http_header;
1.92 bisitz 192: my $msg='<h1>'.&mt('Sorry ...').'</h1>'
193: .&mt('Please [_1]log in again[_2].');
1.74 albertel 194: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 195: }
196:
1.1 albertel 197: # ---------------------------------------------------------------- Main handler
198:
199: sub handler {
200: my $r = shift;
1.85 albertel 201: my $form;
1.55 www 202: # Are we re-routing?
203: if (-e '/home/httpd/html/lon-status/reroute.txt') {
204: &reroute($r);
205: return OK;
206: }
1.56 www 207:
1.57 www 208: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 209:
1.59 www 210: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 211: my $handle = &Apache::lonnet::check_for_valid_session($r);
212: if ($handle ne '') {
1.101.8.1 raeburn 213: my $lonidsdir=$r->dir_config('lonIDsDir');
214: if ($handle=~/^publicuser\_/) {
215: # For "public user" - remove it, we apparently really want to login
216: unlink($r->dir_config('lonIDsDir')."/$handle.id");
217: } else {
1.59 www 218: # Indeed, a valid token is found
1.101.8.1 raeburn 219: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
220: &Apache::loncommon::content_type($r,'text/html');
221: $r->send_http_header;
222: my $start_page =
223: &Apache::loncommon::start_page('Already logged in');
224: my $end_page =
225: &Apache::loncommon::end_page();
226: my $dest = '/adm/roles';
227: if ($env{'form.firsturl'} ne '') {
228: $dest = $env{'form.firsturl'};
229: }
230: $r->print(
231: $start_page
232: .'<h1>'.&mt('You are already logged in!').'</h1>'
233: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
234: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
235: .'</p>'
236: .$end_page
237: );
238: return OK;
239: }
1.59 www 240: }
241:
242: # ---------------------------------------------------- No valid token, continue
243:
244:
1.1 albertel 245: my $buffer;
1.84 albertel 246: if ($r->header_in('Content-length') > 0) {
247: $r->read($buffer,$r->header_in('Content-length'),0);
248: }
1.85 albertel 249: my %form;
250: foreach my $pair (split(/&/,$buffer)) {
251: my ($name,$value) = split(/=/,$pair);
1.7 www 252: $value =~ tr/+/ /;
253: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 254: $form{$name}=$value;
1.1 albertel 255: }
256:
1.85 albertel 257: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
258: &failed($r,'Username, password and domain need to be specified.',
259: \%form);
1.1 albertel 260: return OK;
261: }
1.61 www 262:
263: # split user logging in and "su"-user
264:
1.85 albertel 265: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 266: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
267: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
268: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 269:
270: my $role = $r->dir_config('lonRole');
271: my $domain = $r->dir_config('lonDefDomain');
272: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 273: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 274:
1.8 www 275: # ---------------------------------------- Get the information from login token
276:
1.85 albertel 277: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
278: $form{'serverid'});
1.8 www 279:
1.101.8.7 raeburn 280: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
281: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 282: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 283: return OK;
1.44 www 284: } else {
1.85 albertel 285: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
286: $form{'serverid'});
1.77 albertel 287: if ( $reply ne 'ok' ) {
1.85 albertel 288: &failed($r,'Session could not be opened.',\%form);
289: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 290: return OK;
1.44 www 291: }
1.8 www 292: }
1.100 raeburn 293:
1.93 raeburn 294: if (!&Apache::lonnet::domain($form{'udom'})) {
295: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
296: return OK;
297: }
1.100 raeburn 298:
299: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
300: if ($rolestr) {
301: $rolestr = &unescape($rolestr);
302: }
303: if ($symbstr) {
304: $symbstr= &unescape($symbstr);
305: }
306: if ($rolestr =~ /^role=/) {
307: (undef,$form{'role'}) = split('=',$rolestr);
308: }
309: if ($symbstr =~ /^symb=/) {
310: (undef,$form{'symb'}) = split('=',$symbstr);
311: }
1.8 www 312:
313: my $keybin=pack("H16",$key);
314:
1.26 harris41 315: my $cipher;
316: if ($Crypt::DES::VERSION>=2.03) {
317: $cipher=new Crypt::DES $keybin;
318: }
319: else {
320: $cipher=new DES $keybin;
321: }
1.67 www 322: my $upass='';
323: for (my $i=0;$i<=2;$i++) {
324: my $chunk=
1.85 albertel 325: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 326:
1.67 www 327: $chunk.=
1.85 albertel 328: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 329:
1.67 www 330: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
331: $upass.=$chunk;
332: }
1.8 www 333:
1.1 albertel 334: # ---------------------------------------------------------------- Authenticate
1.101.8.8! raeburn 335:
1.90 raeburn 336: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.101.8.8! raeburn 337: my ($cancreate,$statustocreate) =
! 338: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
1.90 raeburn 339: my $defaultauth;
1.101.8.8! raeburn 340: if (ref($cancreate) eq 'ARRAY') {
! 341: if (grep(/^login$/,@{$cancreate})) {
! 342: $defaultauth = 1;
! 343: }
1.90 raeburn 344: }
1.101.8.2 raeburn 345: my $clientcancheckhost = 1;
1.90 raeburn 346: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.101.8.2 raeburn 347: $form{'udom'},$defaultauth,
348: $clientcancheckhost);
1.1 albertel 349:
350: # --------------------------------------------------------------------- Failed?
351:
352: if ($authhost eq 'no_host') {
1.85 albertel 353: &failed($r,'Username and/or password could not be authenticated.',
354: \%form);
1.1 albertel 355: return OK;
1.90 raeburn 356: } elsif ($authhost eq 'no_account_on_host') {
1.101.8.8! raeburn 357: if ($defaultauth) {
1.101.8.2 raeburn 358: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.101.8.5 raeburn 359: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
1.101.8.8! raeburn 360: return OK;
1.101.8.5 raeburn 361: }
1.90 raeburn 362: my $start_page =
363: &Apache::loncommon::start_page('Create a user account in LON-CAPA',
364: '',{'no_inline_link' => 1,});
1.93 raeburn 365: my $lonhost = $r->dir_config('lonHostID');
366: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
367: my $contacts =
368: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
369: $form{'udom'},$origmail);
370: my ($contact_email) = split(',',$contacts);
1.101.8.8! raeburn 371: my $output =
! 372: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
! 373: $domdesc,'',$lonhost,
! 374: $contact_email,$contact_name,
! 375: undef,$statustocreate);
1.90 raeburn 376: &Apache::loncommon::content_type($r,'text/html');
377: $r->send_http_header;
378: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 379: $r->print('<h3>'.&mt('Account creation').'</h3>'.
380: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
381: $output.&Apache::loncommon::end_page());
1.90 raeburn 382: return OK;
383: } else {
384: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
385: return OK;
386: }
1.1 albertel 387: }
388:
1.59 www 389: if (($firsturl eq '') ||
390: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 391: $firsturl='/adm/roles';
1.7 www 392: }
1.61 www 393: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 394: if ($form{'suname'}) {
1.61 www 395: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 396: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 397: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 398: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 399: eq 'no_host') {
1.85 albertel 400: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 401: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 402: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 403: # -------------------------------------------------------- actually switch users
1.85 albertel 404: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
405: ' logging in as '.$form{'suname'});
406: $form{'uname'}=$form{'suname'};
1.61 www 407: } else {
408: &Apache::lonnet::logthis('Attempted switch user to privileged user');
409: }
410: }
411: } else {
412: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
413: }
414: }
1.85 albertel 415:
1.81 albertel 416: if ($r->dir_config("lonBalancer") eq 'yes') {
1.101.8.6 raeburn 417: my $otherserver = &Apache::lonnet::spareserver(30000,undef,1,$form{'udom'});
1.101.8.7 raeburn 418: if (!$otherserver) {
419: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
420: }
421: if ($otherserver) {
422: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
423: \%form);
424: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
425: } else {
426: $r->print(&noswitch());
427: }
1.101.8.5 raeburn 428: return OK;
1.81 albertel 429: } else {
1.101.8.7 raeburn 430: if (!&check_can_host($r,\%form,$authhost)) {
431: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
432: if ($otherserver) {
433: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
434: \%form);
435: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
436: } else {
437: $r->print(&noswitch());
438: }
439: return OK;
440: }
1.101.8.4 raeburn 441: # ------------------------------------------------------- Do the load balancing
442:
443: # ---------------------------------------------------------- Determine own load
444: my $loadlim = $r->dir_config('lonLoadLim');
445: my $loadavg;
446: {
447: my $loadfile=Apache::File->new('/proc/loadavg');
448: $loadavg=<$loadfile>;
449: }
450: $loadavg =~ s/\s.*//g;
451: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
452: my $userloadpercent=&Apache::lonnet::userload();
453:
454: # ---------------------------------------------------------- Are we overloaded?
455: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
456: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.101.8.7 raeburn 457: if (!$unloaded) {
458: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
459: }
1.101.8.4 raeburn 460: if ($unloaded) {
461: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
462: undef,\%form);
463: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.101.8.5 raeburn 464: return OK;
1.101.8.4 raeburn 465: }
466: }
467: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
468: \%form);
1.101.8.5 raeburn 469: return OK;
1.81 albertel 470: }
1.1 albertel 471: }
472:
1.101.8.2 raeburn 473: sub check_can_host {
474: my ($r,$form,$authhost,$domdesc) = @_;
475: return unless (ref($form) eq 'HASH');
476: my $canhost = 1;
477: my $lonhost = $r->dir_config('lonHostID');
478: my $udom = $form->{'udom'};
1.101.8.3 raeburn 479: my @intdoms;
480: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
481: if (ref($internet_names) eq 'ARRAY') {
482: @intdoms = @{$internet_names};
483: }
1.101.8.2 raeburn 484: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
485: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
486: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
487: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
488: my $hostname = &Apache::lonnet::hostname($lonhost);
489: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
490: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
491: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
492: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
493: my $loncaparev;
494: if ($authhost eq 'no_account_on_host') {
495: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
496: } else {
497: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
498: }
499: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
500: $udomdefaults{'remotesessions'},
501: $defdomdefaults{'hostedsessions'});
502: }
503: unless ($canhost) {
504: if ($authhost eq 'no_account_on_host') {
1.101.8.7 raeburn 505: my $checkloginvia = 1;
506: my ($login_host,$hostname) =
507: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.101.8.2 raeburn 508: &Apache::loncommon::content_type($r,'text/html');
509: $r->send_http_header;
510: if ($login_host ne '') {
511: my $protocol = $Apache::lonnet::protocol{$login_host};
512: $protocol = 'http' if ($protocol ne 'https');
513: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
514: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
515: '<h3>'.&mt('Account creation').'</h3>'.
516: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
517: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
518: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
519: &Apache::loncommon::end_page());
520: } else {
521: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
522: '<h3>'.&mt('Account creation unavailable').'</h3>'.
523: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
524: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
525: &Apache::loncommon::end_page());
526: }
527: } else {
528: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
529: $form);
530: my ($otherserver) = &Apache::lonnet::choose_server($udom);
531: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
532: }
533: }
1.101.8.5 raeburn 534: return $canhost;
1.101.8.2 raeburn 535: }
536:
1.101.8.7 raeburn 537: sub noswitch {
538: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
539: '<h3>'.&mt('Session unavailable').'</h3>'.
540: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
541: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
542: &Apache::loncommon::end_page();
543: return $result;
544: }
545:
1.1 albertel 546: 1;
547: __END__
1.7 www 548:
549:
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