Annotation of loncom/auth/lonauth.pm, revision 1.112
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.112 ! raeburn 4: # $Id: lonauth.pm,v 1.111 2011/02/24 23:37:50 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: $form{'serverid'});
1.8 www 276:
277: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
1.85 albertel 278: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 279: return OK;
1.44 www 280: } else {
1.85 albertel 281: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
282: $form{'serverid'});
1.77 albertel 283: if ( $reply ne 'ok' ) {
1.85 albertel 284: &failed($r,'Session could not be opened.',\%form);
285: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 286: return OK;
1.44 www 287: }
1.8 www 288: }
1.100 raeburn 289:
1.93 raeburn 290: if (!&Apache::lonnet::domain($form{'udom'})) {
291: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
292: return OK;
293: }
1.100 raeburn 294:
295: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
296: if ($rolestr) {
297: $rolestr = &unescape($rolestr);
298: }
299: if ($symbstr) {
300: $symbstr= &unescape($symbstr);
301: }
302: if ($rolestr =~ /^role=/) {
303: (undef,$form{'role'}) = split('=',$rolestr);
304: }
305: if ($symbstr =~ /^symb=/) {
306: (undef,$form{'symb'}) = split('=',$symbstr);
307: }
1.8 www 308:
309: my $keybin=pack("H16",$key);
310:
1.26 harris41 311: my $cipher;
312: if ($Crypt::DES::VERSION>=2.03) {
313: $cipher=new Crypt::DES $keybin;
314: }
315: else {
316: $cipher=new DES $keybin;
317: }
1.67 www 318: my $upass='';
319: for (my $i=0;$i<=2;$i++) {
320: my $chunk=
1.85 albertel 321: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 322:
1.67 www 323: $chunk.=
1.85 albertel 324: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 325:
1.67 www 326: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
327: $upass.=$chunk;
328: }
1.8 www 329:
1.1 albertel 330: # ---------------------------------------------------------------- Authenticate
1.91 raeburn 331: my @cancreate;
1.90 raeburn 332: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
333: if (ref($domconfig{'usercreation'}) eq 'HASH') {
334: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
1.91 raeburn 335: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
336: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
337: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
338: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
339: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
1.90 raeburn 340: }
341: }
342: }
343: my $defaultauth;
1.91 raeburn 344: if (grep(/^login$/,@cancreate)) {
1.90 raeburn 345: $defaultauth = 1;
346: }
1.105 raeburn 347: my $clientcancheckhost = 1;
1.90 raeburn 348: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 349: $form{'udom'},$defaultauth,
350: $clientcancheckhost);
1.1 albertel 351:
352: # --------------------------------------------------------------------- Failed?
353:
354: if ($authhost eq 'no_host') {
1.85 albertel 355: &failed($r,'Username and/or password could not be authenticated.',
356: \%form);
1.1 albertel 357: return OK;
1.90 raeburn 358: } elsif ($authhost eq 'no_account_on_host') {
359: my %domconfig =
360: &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.91 raeburn 361: if (grep(/^login$/,@cancreate)) {
1.105 raeburn 362: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 363: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
364: return OK;
365: }
1.90 raeburn 366: my $start_page =
1.104 droeschl 367: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
1.93 raeburn 368: my $lonhost = $r->dir_config('lonHostID');
369: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
370: my $contacts =
371: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
372: $form{'udom'},$origmail);
373: my ($contact_email) = split(',',$contacts);
1.94 raeburn 374: my $output = &Apache::createaccount::username_check($form{'uname'},
375: $form{'udom'},$domdesc,'',
376: $lonhost,$contact_email,$contact_name);
1.90 raeburn 377: &Apache::loncommon::content_type($r,'text/html');
378: $r->send_http_header;
379: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 380: $r->print('<h3>'.&mt('Account creation').'</h3>'.
381: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
382: $output.&Apache::loncommon::end_page());
1.90 raeburn 383: return OK;
384: } else {
385: &failed($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);
386: return OK;
387: }
1.1 albertel 388: }
389:
1.59 www 390: if (($firsturl eq '') ||
391: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 392: $firsturl='/adm/roles';
1.7 www 393: }
1.61 www 394: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 395: if ($form{'suname'}) {
1.61 www 396: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 397: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 398: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 399: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 400: eq 'no_host') {
1.85 albertel 401: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 402: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 403: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 404: # -------------------------------------------------------- actually switch users
1.85 albertel 405: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
406: ' logging in as '.$form{'suname'});
407: $form{'uname'}=$form{'suname'};
1.61 www 408: } else {
409: &Apache::lonnet::logthis('Attempted switch user to privileged user');
410: }
411: }
412: } else {
413: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
414: }
415: }
1.85 albertel 416:
1.110 raeburn 417: unless (&check_can_host($r,\%form,$authhost)) {
418: return OK;
419: }
1.105 raeburn 420:
1.81 albertel 421: if ($r->dir_config("lonBalancer") eq 'yes') {
1.85 albertel 422: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
423: \%form);
1.107 raeburn 424: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.109 raeburn 425: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
1.110 raeburn 426: return OK;
1.81 albertel 427: } else {
1.109 raeburn 428: # ------------------------------------------------------- Do the load balancing
429:
430: # ---------------------------------------------------------- Determine own load
431: my $loadlim = $r->dir_config('lonLoadLim');
432: my $loadavg;
433: {
434: my $loadfile=Apache::File->new('/proc/loadavg');
435: $loadavg=<$loadfile>;
436: }
437: $loadavg =~ s/\s.*//g;
438: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
439: my $userloadpercent=&Apache::lonnet::userload();
440:
441: # ---------------------------------------------------------- Are we overloaded?
442: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
443: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
444: if ($unloaded) {
445: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
446: undef,\%form);
447: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 448: return OK;
1.109 raeburn 449: }
450: }
451: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
452: \%form);
1.110 raeburn 453: return OK;
1.81 albertel 454: }
1.1 albertel 455: }
456:
1.105 raeburn 457: sub check_can_host {
458: my ($r,$form,$authhost,$domdesc) = @_;
459: return unless (ref($form) eq 'HASH');
460: my $canhost = 1;
1.106 raeburn 461: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 462: my $udom = $form->{'udom'};
1.108 raeburn 463: my @intdoms;
464: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
465: if (ref($internet_names) eq 'ARRAY') {
466: @intdoms = @{$internet_names};
467: }
1.106 raeburn 468: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
469: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
470: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
471: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
472: my $hostname = &Apache::lonnet::hostname($lonhost);
473: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
474: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
475: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 476: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
477: my $loncaparev;
478: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 479: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 480: } else {
1.106 raeburn 481: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 482: }
1.106 raeburn 483: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
484: $udomdefaults{'remotesessions'},
485: $defdomdefaults{'hostedsessions'});
1.105 raeburn 486: }
487: unless ($canhost) {
488: if ($authhost eq 'no_account_on_host') {
1.107 raeburn 489: my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 490: &Apache::loncommon::content_type($r,'text/html');
491: $r->send_http_header;
492: if ($login_host ne '') {
493: my $protocol = $Apache::lonnet::protocol{$login_host};
494: $protocol = 'http' if ($protocol ne 'https');
495: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
496: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
497: '<h3>'.&mt('Account creation').'</h3>'.
498: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
499: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
500: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
501: &Apache::loncommon::end_page());
502: } else {
503: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
504: '<h3>'.&mt('Account creation unavailable').'</h3>'.
505: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
506: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
507: &Apache::loncommon::end_page());
508: }
509: } else {
510: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
511: $form);
1.107 raeburn 512: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 513: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
514: }
515: }
1.110 raeburn 516: return $canhost;
1.105 raeburn 517: }
518:
1.1 albertel 519: 1;
520: __END__
1.7 www 521:
522:
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