Annotation of loncom/auth/lonauth.pm, revision 1.118
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.118 ! raeburn 4: # $Id: lonauth.pm,v 1.117 2011/08/09 01:35:31 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;
1.109 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'};
1.111 raeburn 85: my $update=$env{'user.update.time'};
86: if (!$update) {
87: $update = $then;
88: }
1.100 raeburn 89: if (exists($env{$envkey})) {
90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
1.111 raeburn 91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
1.100 raeburn 92: \$trolecode,\$tstatus,\$tstart,\$tend);
93: if ($tstatus eq 'is') {
1.101 raeburn 94: $destination .= ($destination =~ /\?/) ? '&' : '?';
95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
96: $destination .= 'selectrole=1&'.$newrole.'=1';
1.100 raeburn 97: }
98: }
99: }
1.101 raeburn 100: if (defined($form->{symb})) {
101: my $destsymb = $form->{symb};
102: $destination .= ($destination =~ /\?/) ? '&' : '?';
103: if ($destsymb =~ /___/) {
104: # FIXME Need to deal with encrypted symbs and urls as needed.
105: my ($map,$resid,$desturl)=split(/___/,$destsymb);
106: unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
107: $desturl = &Apache::lonnet::clutter($desturl);
108: }
109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
111: $destination .= '&destinationurl='.$desturl.
112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
115: $destination .= '&destinationurl='.$destsymb;
116: }
117: }
1.111 raeburn 118: if ($destination =~ m{^/adm/roles}) {
119: $destination .= ($destination =~ /\?/) ? '&' : '?';
120: $destination .= 'source=login';
121: }
1.100 raeburn 122:
1.102 droeschl 123: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
124: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
1.99 bisitz 125: my $brcrum = [{'href' => '',
126: 'text' => 'Successful Login'},];
1.74 albertel 127: my $start_page=&Apache::loncommon::start_page('Successful Login',
1.102 droeschl 128: $header,
1.104 droeschl 129: {'bread_crumbs' => $brcrum,});
1.74 albertel 130: my $end_page =&Apache::loncommon::end_page();
131:
1.102 droeschl 132: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
1.5 www 133: # ------------------------------------------------- Output for successful login
134:
1.74 albertel 135: &Apache::loncommon::content_type($r,'text/html');
136: $r->header_out('Set-cookie' => $cookie);
137: $r->send_http_header;
1.1 albertel 138:
1.58 www 139: my %lt=&Apache::lonlocal::texthash(
140: 'wel' => 'Welcome',
1.92 bisitz 141: 'pro' => 'Login problems?',
1.58 www 142: 'log' => 'loginproblems.html',
143: );
1.112 raeburn 144: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
1.1 albertel 145: $r->print(<<ENDSUCCESS);
1.74 albertel 146: $start_page
1.19 www 147: $windowinfo
1.58 www 148: <h1>$lt{'wel'}</h1>
1.112 raeburn 149: $welcome<p>
1.92 bisitz 150: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
1.64 albertel 151: $continuelink
1.74 albertel 152: $end_page
1.1 albertel 153: ENDSUCCESS
154: }
155:
156: # --------------------------------------------------------------- Failed login!
157:
158: sub failed {
1.85 albertel 159: my ($r,$message,$form) = @_;
1.104 droeschl 160: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef);
1.100 raeburn 161: my $retry = '/adm/login?username='.$form->{'uname'}.
162: '&domain='.$form->{'udom'};
163: if (exists($form->{role})) {
164: $retry .= '&role='.$form->{role};
165: }
166: if (exists($form->{symb})) {
167: $retry .= '&symb='.$form->{symb};
168: }
1.74 albertel 169: my $end_page = &Apache::loncommon::end_page();
170: &Apache::loncommon::content_type($r,'text/html');
171: $r->send_http_header;
1.92 bisitz 172: $r->print(
173: $start_page
174: .'<h1>'.&mt('Sorry ...').'</h1>'
1.95 bisitz 175: .'<p class="LC_warning">'.&mt($message).'</p>'
1.100 raeburn 176: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
1.92 bisitz 177: .'</p>'
178: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
179: .$end_page
180: );
181: }
1.60 www 182:
1.55 www 183: # ------------------------------------------------------------------ Rerouting!
184:
185: sub reroute {
1.74 albertel 186: my ($r) = @_;
187: &Apache::loncommon::content_type($r,'text/html');
188: $r->send_http_header;
1.92 bisitz 189: my $msg='<h1>'.&mt('Sorry ...').'</h1>'
190: .&mt('Please [_1]log in again[_2].');
1.74 albertel 191: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
1.55 www 192: }
193:
1.1 albertel 194: # ---------------------------------------------------------------- Main handler
195:
196: sub handler {
197: my $r = shift;
1.85 albertel 198: my $form;
1.55 www 199: # Are we re-routing?
200: if (-e '/home/httpd/html/lon-status/reroute.txt') {
201: &reroute($r);
202: return OK;
203: }
1.56 www 204:
1.57 www 205: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 206:
1.59 www 207: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 208: my $handle = &Apache::lonnet::check_for_valid_session($r);
209: if ($handle ne '') {
1.103 raeburn 210: my $lonidsdir=$r->dir_config('lonIDsDir');
211: if ($handle=~/^publicuser\_/) {
212: # For "public user" - remove it, we apparently really want to login
213: unlink($r->dir_config('lonIDsDir')."/$handle.id");
214: } else {
1.59 www 215: # Indeed, a valid token is found
1.103 raeburn 216: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
217: &Apache::loncommon::content_type($r,'text/html');
218: $r->send_http_header;
219: my $start_page =
220: &Apache::loncommon::start_page('Already logged in');
221: my $end_page =
222: &Apache::loncommon::end_page();
1.105 raeburn 223: my $dest = '/adm/roles';
224: if ($env{'form.firsturl'} ne '') {
225: $dest = $env{'form.firsturl'};
226: }
1.103 raeburn 227: $r->print(
228: $start_page
229: .'<h1>'.&mt('You are already logged in!').'</h1>'
230: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.105 raeburn 231: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
1.103 raeburn 232: .'</p>'
233: .$end_page
234: );
235: return OK;
236: }
1.59 www 237: }
238:
239: # ---------------------------------------------------- No valid token, continue
240:
241:
1.1 albertel 242: my $buffer;
1.84 albertel 243: if ($r->header_in('Content-length') > 0) {
244: $r->read($buffer,$r->header_in('Content-length'),0);
245: }
1.85 albertel 246: my %form;
247: foreach my $pair (split(/&/,$buffer)) {
248: my ($name,$value) = split(/=/,$pair);
1.7 www 249: $value =~ tr/+/ /;
250: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 251: $form{$name}=$value;
1.1 albertel 252: }
253:
1.85 albertel 254: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
255: &failed($r,'Username, password and domain need to be specified.',
256: \%form);
1.1 albertel 257: return OK;
258: }
1.61 www 259:
260: # split user logging in and "su"-user
261:
1.85 albertel 262: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 263: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
264: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
265: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 266:
267: my $role = $r->dir_config('lonRole');
268: my $domain = $r->dir_config('lonDefDomain');
269: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 270: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 271:
1.8 www 272: # ---------------------------------------- Get the information from login token
273:
1.85 albertel 274: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
275: $form{'serverid'});
1.8 www 276:
1.114 raeburn 277: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
278: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 279: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 280: return OK;
1.44 www 281: } else {
1.85 albertel 282: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
283: $form{'serverid'});
1.77 albertel 284: if ( $reply ne 'ok' ) {
1.85 albertel 285: &failed($r,'Session could not be opened.',\%form);
286: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 287: return OK;
1.44 www 288: }
1.8 www 289: }
1.100 raeburn 290:
1.93 raeburn 291: if (!&Apache::lonnet::domain($form{'udom'})) {
292: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
293: return OK;
294: }
1.100 raeburn 295:
296: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
297: if ($rolestr) {
298: $rolestr = &unescape($rolestr);
299: }
300: if ($symbstr) {
301: $symbstr= &unescape($symbstr);
302: }
303: if ($rolestr =~ /^role=/) {
304: (undef,$form{'role'}) = split('=',$rolestr);
305: }
306: if ($symbstr =~ /^symb=/) {
307: (undef,$form{'symb'}) = split('=',$symbstr);
308: }
1.8 www 309:
310: my $keybin=pack("H16",$key);
311:
1.26 harris41 312: my $cipher;
313: if ($Crypt::DES::VERSION>=2.03) {
314: $cipher=new Crypt::DES $keybin;
315: }
316: else {
317: $cipher=new DES $keybin;
318: }
1.67 www 319: my $upass='';
320: for (my $i=0;$i<=2;$i++) {
321: my $chunk=
1.85 albertel 322: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 323:
1.67 www 324: $chunk.=
1.85 albertel 325: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 326:
1.67 www 327: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
328: $upass.=$chunk;
329: }
1.8 www 330:
1.1 albertel 331: # ---------------------------------------------------------------- Authenticate
1.91 raeburn 332: my @cancreate;
1.90 raeburn 333: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
334: if (ref($domconfig{'usercreation'}) eq 'HASH') {
335: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
1.91 raeburn 336: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
337: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
338: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
339: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
340: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
1.90 raeburn 341: }
342: }
343: }
344: my $defaultauth;
1.91 raeburn 345: if (grep(/^login$/,@cancreate)) {
1.90 raeburn 346: $defaultauth = 1;
347: }
1.105 raeburn 348: my $clientcancheckhost = 1;
1.90 raeburn 349: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 350: $form{'udom'},$defaultauth,
351: $clientcancheckhost);
1.1 albertel 352:
353: # --------------------------------------------------------------------- Failed?
354:
355: if ($authhost eq 'no_host') {
1.85 albertel 356: &failed($r,'Username and/or password could not be authenticated.',
357: \%form);
1.1 albertel 358: return OK;
1.90 raeburn 359: } elsif ($authhost eq 'no_account_on_host') {
360: my %domconfig =
361: &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.91 raeburn 362: if (grep(/^login$/,@cancreate)) {
1.105 raeburn 363: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 364: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
365: return OK;
366: }
1.90 raeburn 367: my $start_page =
1.104 droeschl 368: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
1.93 raeburn 369: my $lonhost = $r->dir_config('lonHostID');
370: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
371: my $contacts =
372: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
373: $form{'udom'},$origmail);
374: my ($contact_email) = split(',',$contacts);
1.94 raeburn 375: my $output = &Apache::createaccount::username_check($form{'uname'},
376: $form{'udom'},$domdesc,'',
377: $lonhost,$contact_email,$contact_name);
1.90 raeburn 378: &Apache::loncommon::content_type($r,'text/html');
379: $r->send_http_header;
380: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 381: $r->print('<h3>'.&mt('Account creation').'</h3>'.
382: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
383: $output.&Apache::loncommon::end_page());
1.90 raeburn 384: return OK;
385: } else {
386: &failed($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);
387: return OK;
388: }
1.1 albertel 389: }
390:
1.59 www 391: if (($firsturl eq '') ||
392: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 393: $firsturl='/adm/roles';
1.7 www 394: }
1.61 www 395: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 396: if ($form{'suname'}) {
1.61 www 397: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 398: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 399: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 400: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 401: eq 'no_host') {
1.85 albertel 402: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 403: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 404: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 405: # -------------------------------------------------------- actually switch users
1.85 albertel 406: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
407: ' logging in as '.$form{'suname'});
408: $form{'uname'}=$form{'suname'};
1.61 www 409: } else {
410: &Apache::lonnet::logthis('Attempted switch user to privileged user');
411: }
412: }
413: } else {
414: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
415: }
416: }
1.85 albertel 417:
1.117 raeburn 418: my ($is_balancer,$otherserver) =
419: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
420:
421: if ($is_balancer) {
1.115 raeburn 422: if (!$otherserver) {
1.116 raeburn 423: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 424: }
425: if ($otherserver) {
426: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
427: \%form);
428: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
429: } else {
430: $r->print(&noswitch());
431: }
1.110 raeburn 432: return OK;
1.81 albertel 433: } else {
1.115 raeburn 434: if (!&check_can_host($r,\%form,$authhost)) {
1.118 ! raeburn 435: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 436: if ($otherserver) {
437: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
438: \%form);
439: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
440: } else {
441: $r->print(&noswitch());
442: }
443: return OK;
444: }
445:
1.109 raeburn 446: # ------------------------------------------------------- Do the load balancing
447:
448: # ---------------------------------------------------------- Determine own load
449: my $loadlim = $r->dir_config('lonLoadLim');
450: my $loadavg;
451: {
452: my $loadfile=Apache::File->new('/proc/loadavg');
453: $loadavg=<$loadfile>;
454: }
455: $loadavg =~ s/\s.*//g;
456: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
457: my $userloadpercent=&Apache::lonnet::userload();
458:
459: # ---------------------------------------------------------- Are we overloaded?
460: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
461: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.115 raeburn 462: if (!$unloaded) {
1.118 ! raeburn 463: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 464: }
1.109 raeburn 465: if ($unloaded) {
466: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
467: undef,\%form);
468: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 469: return OK;
1.109 raeburn 470: }
471: }
472: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
473: \%form);
1.110 raeburn 474: return OK;
1.81 albertel 475: }
1.1 albertel 476: }
477:
1.105 raeburn 478: sub check_can_host {
479: my ($r,$form,$authhost,$domdesc) = @_;
480: return unless (ref($form) eq 'HASH');
481: my $canhost = 1;
1.106 raeburn 482: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 483: my $udom = $form->{'udom'};
1.108 raeburn 484: my @intdoms;
485: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
486: if (ref($internet_names) eq 'ARRAY') {
487: @intdoms = @{$internet_names};
488: }
1.106 raeburn 489: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
490: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
491: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
492: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
493: my $hostname = &Apache::lonnet::hostname($lonhost);
494: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
495: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
496: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 497: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
498: my $loncaparev;
499: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 500: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 501: } else {
1.106 raeburn 502: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 503: }
1.106 raeburn 504: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
505: $udomdefaults{'remotesessions'},
506: $defdomdefaults{'hostedsessions'});
1.105 raeburn 507: }
508: unless ($canhost) {
509: if ($authhost eq 'no_account_on_host') {
1.115 raeburn 510: my $checkloginvia = 1;
511: my ($login_host,$hostname) =
512: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.105 raeburn 513: &Apache::loncommon::content_type($r,'text/html');
514: $r->send_http_header;
515: if ($login_host ne '') {
516: my $protocol = $Apache::lonnet::protocol{$login_host};
517: $protocol = 'http' if ($protocol ne 'https');
518: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
519: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
520: '<h3>'.&mt('Account creation').'</h3>'.
521: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
522: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
523: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
524: &Apache::loncommon::end_page());
525: } else {
526: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
527: '<h3>'.&mt('Account creation unavailable').'</h3>'.
528: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
529: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
530: &Apache::loncommon::end_page());
531: }
532: } else {
533: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
534: $form);
1.107 raeburn 535: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 536: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
537: }
538: }
1.110 raeburn 539: return $canhost;
1.105 raeburn 540: }
541:
1.115 raeburn 542: sub noswitch {
543: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
544: '<h3>'.&mt('Session unavailable').'</h3>'.
545: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
546: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
547: &Apache::loncommon::end_page();
548: return $result;
549: }
550:
1.1 albertel 551: 1;
552: __END__
1.7 www 553:
554:
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