Annotation of loncom/auth/lonauth.pm, revision 1.134
1.1 albertel 1: # The LearningOnline Network
2: # User Authentication Module
1.27 www 3: #
1.134 ! raeburn 4: # $Id: lonauth.pm,v 1.133 2014/04/06 13:40:19 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;
1.119 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(/___/,$destsymb);
1.124 raeburn 106: unless ($desturl=~/^(adm|editupload|public)/) {
1.101 raeburn 107: $desturl = &Apache::lonnet::clutter($desturl);
108: }
109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
1.130 raeburn 111: $destination .= 'destinationurl='.$desturl.
1.101 raeburn 112: '&destsymb='.$destsymb;
113: } else {
114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
1.130 raeburn 115: $destination .= 'destinationurl='.$destsymb;
1.101 raeburn 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: );
1.122 raeburn 143: my $loginhelp = &loginhelpdisplay($domain);
144: if ($loginhelp) {
145: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
146: }
147:
1.112 raeburn 148: 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 149: $r->print(<<ENDSUCCESS);
1.74 albertel 150: $start_page
1.19 www 151: $windowinfo
1.58 www 152: <h1>$lt{'wel'}</h1>
1.122 raeburn 153: $welcome
154: $loginhelp
1.64 albertel 155: $continuelink
1.74 albertel 156: $end_page
1.1 albertel 157: ENDSUCCESS
1.134 ! raeburn 158: return;
1.1 albertel 159: }
160:
161: # --------------------------------------------------------------- Failed login!
162:
163: sub failed {
1.85 albertel 164: my ($r,$message,$form) = @_;
1.128 raeburn 165: (undef,undef,undef,my $clientmathml,my $clientunicode) =
166: &Apache::loncommon::decode_user_agent();
167: my $args = {};
168: if ($clientunicode && !$clientmathml) {
169: $args = {'browser.unicode' => 1};
170: }
171:
172: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
1.129 raeburn 173: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
174: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
175: if (&Apache::lonnet::domain($udom,'description') eq '') {
176: undef($udom);
1.130 raeburn 177: }
1.129 raeburn 178: my $retry = '/adm/login';
179: if ($uname eq $form->{'uname'}) {
180: $retry .= '?username='.$uname;
181: }
1.128 raeburn 182: if ($udom) {
1.129 raeburn 183: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
1.128 raeburn 184: }
1.100 raeburn 185: if (exists($form->{role})) {
1.129 raeburn 186: my $role = &Apache::loncommon::cleanup_html($form->{role});
1.130 raeburn 187: if ($role ne '') {
1.129 raeburn 188: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
189: }
1.100 raeburn 190: }
191: if (exists($form->{symb})) {
1.129 raeburn 192: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
193: if ($symb ne '') {
194: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
195: }
1.100 raeburn 196: }
1.129 raeburn 197: my $end_page = &Apache::loncommon::end_page();
1.74 albertel 198: &Apache::loncommon::content_type($r,'text/html');
199: $r->send_http_header;
1.132 bisitz 200: my @actions =
201: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
1.128 raeburn 202: my $loginhelp = &loginhelpdisplay($udom);
1.123 raeburn 203: if ($loginhelp) {
1.132 bisitz 204: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
1.123 raeburn 205: }
1.132 bisitz 206: #FIXME: link to helpdesk might be added here
1.123 raeburn 207:
1.92 bisitz 208: $r->print(
209: $start_page
1.132 bisitz 210: .'<h2>'.&mt('Sorry ...').'</h2>'
211: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
212: .&Apache::lonhtmlcommon::actionbox(\@actions)
1.92 bisitz 213: .$end_page
214: );
215: }
1.60 www 216:
1.55 www 217: # ------------------------------------------------------------------ Rerouting!
218:
219: sub reroute {
1.74 albertel 220: my ($r) = @_;
221: &Apache::loncommon::content_type($r,'text/html');
222: $r->send_http_header;
1.126 bisitz 223: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
1.92 bisitz 224: .&mt('Please [_1]log in again[_2].');
1.126 bisitz 225: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
1.55 www 226: }
227:
1.1 albertel 228: # ---------------------------------------------------------------- Main handler
229:
230: sub handler {
231: my $r = shift;
1.120 raeburn 232: my $londocroot = $r->dir_config('lonDocRoot');
1.85 albertel 233: my $form;
1.55 www 234: # Are we re-routing?
1.120 raeburn 235: if (-e "$londocroot/lon-status/reroute.txt") {
1.55 www 236: &reroute($r);
237: return OK;
238: }
1.56 www 239:
1.57 www 240: &Apache::lonlocal::get_language_handle($r);
1.1 albertel 241:
1.59 www 242: # -------------------------------- Prevent users from attempting to login twice
1.89 albertel 243: my $handle = &Apache::lonnet::check_for_valid_session($r);
244: if ($handle ne '') {
1.103 raeburn 245: my $lonidsdir=$r->dir_config('lonIDsDir');
246: if ($handle=~/^publicuser\_/) {
247: # For "public user" - remove it, we apparently really want to login
248: unlink($r->dir_config('lonIDsDir')."/$handle.id");
249: } else {
1.59 www 250: # Indeed, a valid token is found
1.103 raeburn 251: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
252: &Apache::loncommon::content_type($r,'text/html');
253: $r->send_http_header;
254: my $start_page =
255: &Apache::loncommon::start_page('Already logged in');
256: my $end_page =
257: &Apache::loncommon::end_page();
1.105 raeburn 258: my $dest = '/adm/roles';
259: if ($env{'form.firsturl'} ne '') {
260: $dest = $env{'form.firsturl'};
261: }
1.103 raeburn 262: $r->print(
263: $start_page
1.125 raeburn 264: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
1.103 raeburn 265: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
1.105 raeburn 266: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
1.103 raeburn 267: .'</p>'
268: .$end_page
269: );
270: return OK;
271: }
1.59 www 272: }
273:
274: # ---------------------------------------------------- No valid token, continue
275:
276:
1.1 albertel 277: my $buffer;
1.84 albertel 278: if ($r->header_in('Content-length') > 0) {
279: $r->read($buffer,$r->header_in('Content-length'),0);
280: }
1.85 albertel 281: my %form;
282: foreach my $pair (split(/&/,$buffer)) {
283: my ($name,$value) = split(/=/,$pair);
1.7 www 284: $value =~ tr/+/ /;
285: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1.85 albertel 286: $form{$name}=$value;
1.127 raeburn 287: }
1.1 albertel 288:
1.85 albertel 289: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
290: &failed($r,'Username, password and domain need to be specified.',
291: \%form);
1.1 albertel 292: return OK;
293: }
1.61 www 294:
295: # split user logging in and "su"-user
296:
1.85 albertel 297: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
1.87 albertel 298: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
299: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
300: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
1.1 albertel 301:
302: my $role = $r->dir_config('lonRole');
303: my $domain = $r->dir_config('lonDefDomain');
304: my $prodir = $r->dir_config('lonUsersDir');
1.93 raeburn 305: my $contact_name = &mt('LON-CAPA helpdesk');
1.1 albertel 306:
1.8 www 307: # ---------------------------------------- Get the information from login token
308:
1.85 albertel 309: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
310: $form{'serverid'});
1.8 www 311:
1.127 raeburn 312: my %sessiondata;
313: if ($form{'iptoken'}) {
314: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
1.133 raeburn 315: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
1.127 raeburn 316: }
317:
1.114 raeburn 318: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
319: ($tmpinfo eq 'no_such_host')) {
1.85 albertel 320: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
1.8 www 321: return OK;
1.44 www 322: } else {
1.85 albertel 323: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
324: $form{'serverid'});
1.77 albertel 325: if ( $reply ne 'ok' ) {
1.85 albertel 326: &failed($r,'Session could not be opened.',\%form);
327: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
1.77 albertel 328: return OK;
1.44 www 329: }
1.8 www 330: }
1.100 raeburn 331:
1.93 raeburn 332: if (!&Apache::lonnet::domain($form{'udom'})) {
333: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
334: return OK;
335: }
1.100 raeburn 336:
337: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
338: if ($rolestr) {
339: $rolestr = &unescape($rolestr);
340: }
341: if ($symbstr) {
342: $symbstr= &unescape($symbstr);
343: }
344: if ($rolestr =~ /^role=/) {
345: (undef,$form{'role'}) = split('=',$rolestr);
346: }
347: if ($symbstr =~ /^symb=/) {
348: (undef,$form{'symb'}) = split('=',$symbstr);
349: }
1.8 www 350:
351: my $keybin=pack("H16",$key);
352:
1.26 harris41 353: my $cipher;
354: if ($Crypt::DES::VERSION>=2.03) {
355: $cipher=new Crypt::DES $keybin;
356: }
357: else {
358: $cipher=new DES $keybin;
359: }
1.67 www 360: my $upass='';
361: for (my $i=0;$i<=2;$i++) {
362: my $chunk=
1.85 albertel 363: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
1.8 www 364:
1.67 www 365: $chunk.=
1.85 albertel 366: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
1.8 www 367:
1.67 www 368: $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
369: $upass.=$chunk;
370: }
1.8 www 371:
1.1 albertel 372: # ---------------------------------------------------------------- Authenticate
1.119 raeburn 373:
1.90 raeburn 374: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
1.119 raeburn 375: my ($cancreate,$statustocreate) =
376: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
377: my $defaultauth;
378: if (ref($cancreate) eq 'ARRAY') {
379: if (grep(/^login$/,@{$cancreate})) {
380: $defaultauth = 1;
1.90 raeburn 381: }
382: }
1.105 raeburn 383: my $clientcancheckhost = 1;
1.90 raeburn 384: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
1.105 raeburn 385: $form{'udom'},$defaultauth,
386: $clientcancheckhost);
1.1 albertel 387:
388: # --------------------------------------------------------------------- Failed?
389:
390: if ($authhost eq 'no_host') {
1.85 albertel 391: &failed($r,'Username and/or password could not be authenticated.',
392: \%form);
1.1 albertel 393: return OK;
1.90 raeburn 394: } elsif ($authhost eq 'no_account_on_host') {
1.119 raeburn 395: if ($defaultauth) {
1.105 raeburn 396: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
1.110 raeburn 397: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
398: return OK;
399: }
1.90 raeburn 400: my $start_page =
1.104 droeschl 401: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
1.93 raeburn 402: my $lonhost = $r->dir_config('lonHostID');
403: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
404: my $contacts =
405: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
406: $form{'udom'},$origmail);
407: my ($contact_email) = split(',',$contacts);
1.119 raeburn 408: my $output =
409: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
410: $domdesc,'',$lonhost,
411: $contact_email,$contact_name,
412: undef,$statustocreate);
1.90 raeburn 413: &Apache::loncommon::content_type($r,'text/html');
414: $r->send_http_header;
415: &Apache::createaccount::print_header($r,$start_page);
1.94 raeburn 416: $r->print('<h3>'.&mt('Account creation').'</h3>'.
417: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
418: $output.&Apache::loncommon::end_page());
1.90 raeburn 419: return OK;
420: } else {
421: &failed($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);
422: return OK;
423: }
1.1 albertel 424: }
425:
1.59 www 426: if (($firsturl eq '') ||
427: ($firsturl=~/^\/adm\/(logout|remote)/)) {
1.24 www 428: $firsturl='/adm/roles';
1.7 www 429: }
1.127 raeburn 430:
431: my $hosthere;
432: if ($form{'iptoken'}) {
433: if (($sessiondata{'domain'} eq $form{'udom'}) &&
434: ($sessiondata{'username'} eq $form{'uname'})) {
435: $hosthere = 1;
436: }
437: }
438:
1.61 www 439: # --------------------------------- Are we attempting to login as somebody else?
1.85 albertel 440: if ($form{'suname'}) {
1.61 www 441: # ------------ see if the original user has enough privileges to pull this stunt
1.85 albertel 442: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
1.61 www 443: # ---------------------------------------------------- see if the su-user exists
1.85 albertel 444: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
1.61 www 445: eq 'no_host') {
1.85 albertel 446: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
1.61 www 447: # ------------------------------ see if the su-user is not too highly privileged
1.85 albertel 448: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
1.61 www 449: # -------------------------------------------------------- actually switch users
1.85 albertel 450: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
451: ' logging in as '.$form{'suname'});
452: $form{'uname'}=$form{'suname'};
1.61 www 453: } else {
454: &Apache::lonnet::logthis('Attempted switch user to privileged user');
455: }
456: }
457: } else {
458: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
459: }
460: }
1.85 albertel 461:
1.127 raeburn 462: my ($is_balancer,$otherserver);
463:
464: unless ($hosthere) {
465: ($is_balancer,$otherserver) =
466: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
467: }
1.117 raeburn 468:
469: if ($is_balancer) {
1.115 raeburn 470: if (!$otherserver) {
1.116 raeburn 471: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 472: }
473: if ($otherserver) {
474: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
475: \%form);
1.131 raeburn 476: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
477: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
478: $switchto .= '&origurl='.$firsturl;
479: }
480: if ($form{'role'}) {
481: $switchto .= '&role='.$form{'role'};
482: }
483: if ($form{'symb'}) {
484: $switchto .= '&symb='.$form{'symb'};
485: }
486: $r->internal_redirect($switchto);
1.115 raeburn 487: } else {
488: $r->print(&noswitch());
489: }
1.110 raeburn 490: return OK;
1.81 albertel 491: } else {
1.115 raeburn 492: if (!&check_can_host($r,\%form,$authhost)) {
1.118 raeburn 493: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 494: if ($otherserver) {
495: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
496: \%form);
1.131 raeburn 497: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
498: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
499: $switchto .= '&origurl='.$firsturl;
500: }
501: if ($form{'role'}) {
502: $switchto .= '&role='.$form{'role'};
503: }
504: if ($form{'symb'}) {
505: $switchto .= '&symb='.$form{'symb'};
506: }
507: $r->internal_redirect($switchto);
1.115 raeburn 508: } else {
509: $r->print(&noswitch());
510: }
511: return OK;
512: }
513:
1.109 raeburn 514: # ------------------------------------------------------- Do the load balancing
515:
516: # ---------------------------------------------------------- Determine own load
517: my $loadlim = $r->dir_config('lonLoadLim');
518: my $loadavg;
519: {
520: my $loadfile=Apache::File->new('/proc/loadavg');
521: $loadavg=<$loadfile>;
522: }
523: $loadavg =~ s/\s.*//g;
524: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
525: my $userloadpercent=&Apache::lonnet::userload();
526:
527: # ---------------------------------------------------------- Are we overloaded?
528: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
529: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
1.115 raeburn 530: if (!$unloaded) {
1.118 raeburn 531: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
1.115 raeburn 532: }
1.109 raeburn 533: if ($unloaded) {
534: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
535: undef,\%form);
536: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
1.110 raeburn 537: return OK;
1.109 raeburn 538: }
539: }
540: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
541: \%form);
1.110 raeburn 542: return OK;
1.81 albertel 543: }
1.1 albertel 544: }
545:
1.105 raeburn 546: sub check_can_host {
547: my ($r,$form,$authhost,$domdesc) = @_;
548: return unless (ref($form) eq 'HASH');
549: my $canhost = 1;
1.106 raeburn 550: my $lonhost = $r->dir_config('lonHostID');
1.105 raeburn 551: my $udom = $form->{'udom'};
1.108 raeburn 552: my @intdoms;
553: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
554: if (ref($internet_names) eq 'ARRAY') {
555: @intdoms = @{$internet_names};
556: }
1.106 raeburn 557: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
558: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
559: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
560: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
561: my $hostname = &Apache::lonnet::hostname($lonhost);
562: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
563: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
564: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
1.105 raeburn 565: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
566: my $loncaparev;
567: if ($authhost eq 'no_account_on_host') {
1.106 raeburn 568: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
1.105 raeburn 569: } else {
1.106 raeburn 570: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
1.105 raeburn 571: }
1.106 raeburn 572: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
573: $udomdefaults{'remotesessions'},
574: $defdomdefaults{'hostedsessions'});
1.105 raeburn 575: }
576: unless ($canhost) {
577: if ($authhost eq 'no_account_on_host') {
1.115 raeburn 578: my $checkloginvia = 1;
579: my ($login_host,$hostname) =
580: &Apache::lonnet::choose_server($udom,$checkloginvia);
1.105 raeburn 581: &Apache::loncommon::content_type($r,'text/html');
582: $r->send_http_header;
583: if ($login_host ne '') {
584: my $protocol = $Apache::lonnet::protocol{$login_host};
585: $protocol = 'http' if ($protocol ne 'https');
586: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
587: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
588: '<h3>'.&mt('Account creation').'</h3>'.
589: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
590: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
591: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
592: &Apache::loncommon::end_page());
593: } else {
594: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
595: '<h3>'.&mt('Account creation unavailable').'</h3>'.
596: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
597: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
598: &Apache::loncommon::end_page());
599: }
600: } else {
601: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
602: $form);
1.107 raeburn 603: my ($otherserver) = &Apache::lonnet::choose_server($udom);
1.105 raeburn 604: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
605: }
606: }
1.110 raeburn 607: return $canhost;
1.105 raeburn 608: }
609:
1.115 raeburn 610: sub noswitch {
611: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
612: '<h3>'.&mt('Session unavailable').'</h3>'.
613: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
614: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
615: &Apache::loncommon::end_page();
616: return $result;
617: }
618:
1.122 raeburn 619: sub loginhelpdisplay {
620: my ($authdomain) = @_;
621: my $login_help = 1;
622: my $lang = &Apache::lonlocal::current_language();
623: if ($login_help) {
624: my $dom = $authdomain;
625: if ($dom eq '') {
626: $dom = &Apache::lonnet::default_login_domain();
627: }
628: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
629: my $loginhelp_url;
630: if ($lang) {
631: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
632: if ($loginhelp_url ne '') {
633: return $loginhelp_url;
634: }
635: }
636: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
637: if ($loginhelp_url ne '') {
638: return $loginhelp_url;
639: } else {
640: return '/adm/loginproblems.html';
641: }
642: }
643: return;
644: }
645:
1.1 albertel 646: 1;
647: __END__
1.7 www 648:
649:
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