loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.146: download - view: text, annotated - select for diffs
Tue Aug 8 18:12:18 2017 UTC (6 years, 9 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Bug 876 for multi-domain servers.
  - Session hosting server and user's home server must have the same "internet
    domain".

1: # The LearningOnline Network 2: # User Authentication Module 3: # 4: # $Id: lonauth.pm,v 1.146 2017/08/08 18:12:18 raeburn Exp $ 5: # 6: # Copyright Michigan State University Board of Trustees 7: # 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA). 9: # 10: # LON-CAPA is free software; you can redistribute it and/or modify 11: # it under the terms of the GNU General Public License as published by 12: # the Free Software Foundation; either version 2 of the License, or 13: # (at your option) any later version. 14: # 15: # LON-CAPA is distributed in the hope that it will be useful, 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18: # GNU General Public License for more details. 19: # 20: # You should have received a copy of the GNU General Public License 21: # along with LON-CAPA; if not, write to the Free Software 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23: # 24: # /home/httpd/html/adm/gpl.txt 25: # 26: # http://www.lon-capa.org/ 27: # 28: 29: package Apache::lonauth; 30: 31: use strict; 32: use LONCAPA qw(:DEFAULT :match); 33: use Apache::Constants qw(:common); 34: use CGI qw(:standard); 35: use Apache::loncommon(); 36: use Apache::lonnet; 37: use Apache::lonmenu(); 38: use Apache::createaccount; 39: use Fcntl qw(:flock); 40: use Apache::lonlocal; 41: use Apache::File(); 42: use HTML::Entities; 43: use Digest::MD5; 44: 45: # ------------------------------------------------------------ Successful login 46: sub success { 47: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env, 48: $form) = @_; 49: 50: # ------------------------------------------------------------ Get cookie ready 51: my $cookie = 52: &Apache::loncommon::init_user_environment($r, $username, $domain, 53: $authhost, $form, 54: {'extra_env' => $extra_env,}); 55: 56: my $public=($username eq 'public' && $domain eq 'public'); 57: 58: if ($public or $lowerurl eq 'noredirect') { return $cookie; } 59: 60: # -------------------------------------------------------------------- Log this 61: 62: &Apache::lonnet::log($domain,$username,$authhost, 63: "Login $ENV{'REMOTE_ADDR'}"); 64: 65: # ------------------------------------------------- Check for critical messages 66: 67: my @what=&Apache::lonnet::dump('critical',$domain,$username); 68: if ($what[0]) { 69: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) { 70: $lowerurl='/adm/email?critical=display'; 71: } 72: } 73: 74: # ----------------------------------------------------------- Get cookies ready 75: my ($securecookie,$defaultcookie); 76: if ($ENV{'SERVER_PORT'} == 443) { 77: $securecookie="lonID=$cookie; path=/; HttpOnly; secure"; 78: my $lonidsdir=$r->dir_config('lonIDsDir'); 79: if (($lonidsdir) && (-e "$lonidsdir/$cookie.id")) { 80: my $linkname=substr(Digest::MD5::md5_hex(Digest::MD5::md5_hex(time(). {}. rand(). $$)), 0, 32).'_linked'; 81: if (-e "$lonidsdir/$linkname.id") { 82: unlink("$lonidsdir/$linkname.id"); 83: } 84: my $made_symlink = eval { symlink("$lonidsdir/$cookie.id", 85: "$lonidsdir/$linkname.id"); 1 }; 86: if ($made_symlink) { 87: $defaultcookie = "lonLinkID=$linkname; path=/; HttpOnly;"; 88: &Apache::lonnet::appenv({'user.linkedenv' => "$lonidsdir/$linkname.id"}); 89: } 90: } 91: } else { 92: $defaultcookie = "lonID=$cookie; path=/; HttpOnly;"; 93: } 94: # -------------------------------------------------------- Menu script and info 95: my $destination = $lowerurl; 96: 97: if (defined($form->{role})) { 98: my $envkey = 'user.role.'.$form->{role}; 99: my $now=time; 100: my $then=$env{'user.login.time'}; 101: my $refresh=$env{'user.refresh.time'}; 102: my $update=$env{'user.update.time'}; 103: if (!$update) { 104: $update = $then; 105: } 106: if (exists($env{$envkey})) { 107: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus); 108: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where, 109: \$trolecode,\$tstatus,\$tstart,\$tend); 110: if ($tstatus eq 'is') { 111: $destination .= ($destination =~ /\?/) ? '&' : '?'; 112: my $newrole = &HTML::Entities::encode($form->{role},'"<>&'); 113: $destination .= 'selectrole=1&'.$newrole.'=1'; 114: } 115: } 116: } 117: if (defined($form->{symb})) { 118: my $destsymb = $form->{symb}; 119: $destination .= ($destination =~ /\?/) ? '&' : '?'; 120: if ($destsymb =~ /___/) { 121: # FIXME Need to deal with encrypted symbs and urls as needed. 122: my ($map,$resid,$desturl)=split(/___/,$destsymb); 123: $desturl = &Apache::lonnet::clutter($desturl); 124: $desturl = &HTML::Entities::encode($desturl,'"<>&'); 125: $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); 126: $destination .= 'destinationurl='.$desturl. 127: '&destsymb='.$destsymb; 128: } else { 129: $destsymb = &HTML::Entities::encode($destsymb,'"<>&'); 130: $destination .= 'destinationurl='.$destsymb; 131: } 132: } 133: if ($destination =~ m{^/adm/roles}) { 134: $destination .= ($destination =~ /\?/) ? '&' : '?'; 135: $destination .= 'source=login'; 136: } 137: 138: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";'); 139: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />'; 140: my $brcrum = [{'href' => '', 141: 'text' => 'Successful Login'},]; 142: my $args = {'bread_crumbs' => $brcrum,}; 143: unless ((defined($form->{role})) || (defined($form->{symb}))) { 144: my $update=$env{'user.update.time'}; 145: if (!$update) { 146: $update = $env{'user.login.time'}; 147: } 148: my %roles_in_env; 149: my $showcount = &Apache::lonroles::roles_from_env(\%roles_in_env,$update); 150: if ($showcount == 1) { 151: foreach my $rolecode (keys(%roles_in_env)) { 152: my ($cid) = ($rolecode =~ m{^\Quser.role.st./\E($match_domain/$match_courseid)(?:/|$)}); 153: if ($cid) { 154: my %coursedescription = 155: &Apache::lonnet::coursedescription($cid,{'one_time' => '1'}); 156: if ($coursedescription{'type'} eq 'Placement') { 157: $args->{'crstype'} = 'Placement'; 158: } 159: last; 160: } 161: } 162: } 163: } 164: my $start_page=&Apache::loncommon::start_page('Successful Login', 165: $header,$args); 166: my $end_page =&Apache::loncommon::end_page(); 167: 168: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>'; 169: # ------------------------------------------------- Output for successful login 170: 171: &Apache::loncommon::content_type($r,'text/html'); 172: if ($securecookie) { 173: $r->headers_out->add('Set-cookie' => $securecookie); 174: } 175: if ($defaultcookie) { 176: $r->headers_out->add('Set-cookie' => $defaultcookie); 177: } 178: $r->send_http_header; 179: 180: my %lt=&Apache::lonlocal::texthash( 181: 'wel' => 'Welcome', 182: 'pro' => 'Login problems?', 183: ); 184: my $loginhelp = &loginhelpdisplay($domain); 185: if ($loginhelp) { 186: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>'; 187: } 188: 189: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 190: $r->print(<<ENDSUCCESS); 191: $start_page 192: $windowinfo 193: <h1>$lt{'wel'}</h1> 194: $welcome 195: $loginhelp 196: $continuelink 197: $end_page 198: ENDSUCCESS 199: return; 200: } 201: 202: # --------------------------------------------------------------- Failed login! 203: 204: sub failed { 205: my ($r,$message,$form) = @_; 206: (undef,undef,undef,my $clientmathml,my $clientunicode) = 207: &Apache::loncommon::decode_user_agent(); 208: my $args = {}; 209: if ($clientunicode && !$clientmathml) { 210: $args = {'browser.unicode' => 1}; 211: } 212: 213: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args); 214: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'}); 215: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'}); 216: if (&Apache::lonnet::domain($udom,'description') eq '') { 217: undef($udom); 218: } 219: my $retry = '/adm/login'; 220: if ($uname eq $form->{'uname'}) { 221: $retry .= '?username='.$uname; 222: } 223: if ($udom) { 224: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom; 225: } 226: if (exists($form->{role})) { 227: my $role = &Apache::loncommon::cleanup_html($form->{role}); 228: if ($role ne '') { 229: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role; 230: } 231: } 232: if (exists($form->{symb})) { 233: my $symb = &Apache::loncommon::cleanup_html($form->{symb}); 234: if ($symb ne '') { 235: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb; 236: } 237: } 238: my $end_page = &Apache::loncommon::end_page(); 239: &Apache::loncommon::content_type($r,'text/html'); 240: $r->send_http_header; 241: my @actions = 242: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')); 243: my $loginhelp = &loginhelpdisplay($udom); 244: if ($loginhelp) { 245: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>'); 246: } 247: #FIXME: link to helpdesk might be added here 248: 249: $r->print( 250: $start_page 251: .'<h2>'.&mt('Sorry ...').'</h2>' 252: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />' 253: .&Apache::lonhtmlcommon::actionbox(\@actions) 254: .$end_page 255: ); 256: } 257: 258: # ------------------------------------------------------------------ Rerouting! 259: 260: sub reroute { 261: my ($r) = @_; 262: &Apache::loncommon::content_type($r,'text/html'); 263: $r->send_http_header; 264: my $msg='<b>'.&mt('Sorry ...').'</b><br />' 265: .&mt('Please [_1]log in again[_2].'); 266: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1}); 267: } 268: 269: # ---------------------------------------------------------------- Main handler 270: 271: sub handler { 272: my $r = shift; 273: my $londocroot = $r->dir_config('lonDocRoot'); 274: # Are we re-routing? 275: if (-e "$londocroot/lon-status/reroute.txt") { 276: &reroute($r); 277: return OK; 278: } 279: 280: &Apache::lonlocal::get_language_handle($r); 281: 282: # -------------------------------- Prevent users from attempting to login twice 283: my $handle = &Apache::lonnet::check_for_valid_session($r); 284: if ($handle ne '') { 285: my $lonidsdir=$r->dir_config('lonIDsDir'); 286: if ($handle=~/^publicuser\_/) { 287: # For "public user" - remove it, we apparently really want to login 288: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 289: } else { 290: # Indeed, a valid token is found 291: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 292: &Apache::loncommon::content_type($r,'text/html'); 293: $r->send_http_header; 294: my $start_page = 295: &Apache::loncommon::start_page('Already logged in'); 296: my $end_page = 297: &Apache::loncommon::end_page(); 298: my $dest = '/adm/roles'; 299: if ($env{'form.firsturl'} ne '') { 300: $dest = $env{'form.firsturl'}; 301: } 302: $r->print( 303: $start_page 304: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>' 305: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' 306: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') 307: .'</p>' 308: .$end_page 309: ); 310: return OK; 311: } 312: } 313: 314: # ---------------------------------------------------- No valid token, continue 315: 316: 317: my $buffer; 318: if ($r->header_in('Content-length') > 0) { 319: $r->read($buffer,$r->header_in('Content-length'),0); 320: } 321: my %form; 322: foreach my $pair (split(/&/,$buffer)) { 323: my ($name,$value) = split(/=/,$pair); 324: $value =~ tr/+/ /; 325: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; 326: $form{$name}=$value; 327: } 328: 329: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { 330: &failed($r,'Username, password and domain need to be specified.', 331: \%form); 332: return OK; 333: } 334: 335: # split user logging in and "su"-user 336: 337: ($form{'uname'},$form{'suname'},$form{'sudom'})=split(/\:/,$form{'uname'}); 338: $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); 339: $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); 340: $form{'udom'} = &LONCAPA::clean_domain($form{'udom'}); 341: $form{'sudom'} = &LONCAPA::clean_domain($form{'sudom'}); 342: 343: my $role = $r->dir_config('lonRole'); 344: my $domain = $r->dir_config('lonDefDomain'); 345: my $prodir = $r->dir_config('lonUsersDir'); 346: my $contact_name = &mt('LON-CAPA helpdesk'); 347: 348: # ---------------------------------------- Get the information from login token 349: 350: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, 351: $form{'serverid'}); 352: 353: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 354: ($tmpinfo eq 'no_such_host')) { 355: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); 356: return OK; 357: } else { 358: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, 359: $form{'serverid'}); 360: if ( $reply ne 'ok' ) { 361: &failed($r,'Session could not be opened.',\%form); 362: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); 363: return OK; 364: } 365: } 366: 367: if (!&Apache::lonnet::domain($form{'udom'})) { 368: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); 369: return OK; 370: } 371: 372: my ($key,$firsturl,$rolestr,$symbstr,$iptokenstr)=split(/&/,$tmpinfo); 373: if ($rolestr) { 374: $rolestr = &unescape($rolestr); 375: } 376: if ($symbstr) { 377: $symbstr= &unescape($symbstr); 378: } 379: if ($iptokenstr) { 380: $iptokenstr = &unescape($iptokenstr); 381: } 382: if ($rolestr =~ /^role=/) { 383: (undef,$form{'role'}) = split('=',$rolestr); 384: } 385: if ($symbstr =~ /^symb=/) { 386: (undef,$form{'symb'}) = split('=',$symbstr); 387: } 388: if ($iptokenstr =~ /^iptoken=/) { 389: (undef,$form{'iptoken'}) = split('=',$iptokenstr); 390: } 391: 392: my $upass = $ENV{HTTPS} ? $form{'upass0'} 393: : &Apache::loncommon::des_decrypt($key,$form{'upass0'}); 394: 395: # ---------------------------------------------------------------- Authenticate 396: 397: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); 398: my ($cancreate,$statustocreate) = 399: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'}); 400: my $defaultauth; 401: if (ref($cancreate) eq 'ARRAY') { 402: if (grep(/^login$/,@{$cancreate})) { 403: $defaultauth = 1; 404: } 405: } 406: my $clientcancheckhost = 1; 407: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, 408: $form{'udom'},$defaultauth, 409: $clientcancheckhost); 410: 411: # --------------------------------------------------------------------- Failed? 412: 413: if ($authhost eq 'no_host') { 414: &failed($r,'Username and/or password could not be authenticated.', 415: \%form); 416: return OK; 417: } elsif ($authhost eq 'no_account_on_host') { 418: if ($defaultauth) { 419: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); 420: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { 421: return OK; 422: } 423: my $start_page = 424: &Apache::loncommon::start_page('Create a user account in LON-CAPA'); 425: my $lonhost = $r->dir_config('lonHostID'); 426: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 427: my $contacts = 428: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', 429: $form{'udom'},$origmail); 430: my ($contact_email) = split(',',$contacts); 431: my $output = 432: &Apache::createaccount::username_check($form{'uname'},$form{'udom'}, 433: $domdesc,'',$lonhost, 434: $contact_email,$contact_name, 435: undef,$statustocreate); 436: &Apache::loncommon::content_type($r,'text/html'); 437: $r->send_http_header; 438: &Apache::createaccount::print_header($r,$start_page); 439: $r->print('<h3>'.&mt('Account creation').'</h3>'. 440: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. 441: $output.&Apache::loncommon::end_page()); 442: return OK; 443: } else { 444: &failed($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); 445: return OK; 446: } 447: } 448: 449: if (($firsturl eq '') || 450: ($firsturl=~/^\/adm\/(logout|remote)/)) { 451: $firsturl='/adm/roles'; 452: } 453: 454: my $hosthere; 455: if ($form{'iptoken'}) { 456: my %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'}); 457: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'}); 458: if (($sessiondata{'domain'} eq $form{'udom'}) && 459: ($sessiondata{'username'} eq $form{'uname'})) { 460: $hosthere = 1; 461: } 462: } 463: 464: # --------------------------------- Are we attempting to login as somebody else? 465: if ($form{'suname'}) { 466: my ($suname,$sudom,$sudomref); 467: $suname = $form{'suname'}; 468: $sudom = $form{'udom'}; 469: if ($form{'sudom'}) { 470: unless ($sudom eq $form{'sudom'}) { 471: if (&Apache::lonnet::domain($form{'sudom'})) { 472: $sudomref = [$form{'sudom'}]; 473: $sudom = $form{'sudom'}; 474: } 475: } 476: } 477: # ------------ see if the original user has enough privileges to pull this stunt 478: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'},$sudomref)) { 479: # ---------------------------------------------------- see if the su-user exists 480: unless (&Apache::lonnet::homeserver($suname,$sudom) eq 'no_host') { 481: # ------------------------------ see if the su-user is not too highly privileged 482: if (&Apache::lonnet::privileged($suname,$sudom)) { 483: &Apache::lonnet::logthis('Attempted switch user to privileged user'); 484: } else { 485: my $noprivswitch; 486: # 487: # su-user's home server and user's home server must have one of: 488: # (a) same internet dom 489: # (b) same primary library server for home server's domain 490: # (c) same "internet domain" for primary library server for home server's domain 491: # 492: my $uprim = &Apache::lonnet::domain($sudom,'primary'); 493: my $uintdom = &Apache::lonnet::internet_dom($uprim); 494: unless ($sudom eq $form{'udom'}) { 495: my $suprim = &Apache::lonnet::domain($sudom,'primary'); 496: my $suintdom = &Apache::lonnet::internet_dom($suprim); 497: unless ($suprim eq $uprim) { 498: unless ($suintdom eq $uintdom) { 499: &Apache::lonnet::logthis('Attempted switch user ' 500: .'to user with different "internet domain".'); 501: $noprivswitch = 1; 502: } 503: } 504: } 505: 506: unless ($noprivswitch) { 507: # 508: # server where log-in occurs must have same "internet domain" as su-user's home 509: # server 510: # 511: my $lonhost = $r->dir_config('lonHostID'); 512: my $hostintdom = &Apache::lonnet::internet_dom($lonhost); 513: if ($hostintdom ne $uintdom) { 514: &Apache::lonnet::logthis('Attempted switch user on a ' 515: .'server with a different "internet domain".'); 516: } else { 517: 518: # -------------------------------------------------------- actually switch users 519: 520: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '. 521: $form{'udom'}.' logging in as '.$suname.':'.$sudom); 522: $form{'uname'}=$suname; 523: if ($form{'udom'} ne $sudom) { 524: $form{'udom'}=$sudom; 525: } 526: } 527: } 528: } 529: } 530: } else { 531: &Apache::lonnet::logthis('Non-privileged user attempting switch user'); 532: } 533: } 534: 535: my ($is_balancer,$otherserver); 536: 537: unless ($hosthere) { 538: ($is_balancer,$otherserver) = 539: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'},'login'); 540: if ($is_balancer) { 541: if ($otherserver eq '') { 542: my $lowest_load; 543: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($form{'udom'}); 544: if ($lowest_load > 100) { 545: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$form{'udom'}); 546: } 547: } 548: if ($otherserver ne '') { 549: my @hosts = &Apache::lonnet::current_machine_ids(); 550: if (grep(/^\Q$otherserver\E$/,@hosts)) { 551: $hosthere = $otherserver; 552: } 553: } 554: } 555: } 556: 557: if (($is_balancer) && (!$hosthere)) { 558: if ($otherserver) { 559: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 560: \%form); 561: my $switchto = '/adm/switchserver?otherserver='.$otherserver; 562: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { 563: $switchto .= '&origurl='.$firsturl; 564: } 565: if ($form{'role'}) { 566: $switchto .= '&role='.$form{'role'}; 567: } 568: if ($form{'symb'}) { 569: $switchto .= '&symb='.$form{'symb'}; 570: } 571: $r->internal_redirect($switchto); 572: } else { 573: $r->print(&noswitch()); 574: } 575: return OK; 576: } else { 577: if (!&check_can_host($r,\%form,$authhost)) { 578: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); 579: if ($otherserver) { 580: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 581: \%form); 582: my $switchto = '/adm/switchserver?otherserver='.$otherserver; 583: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) { 584: $switchto .= '&origurl='.$firsturl; 585: } 586: if ($form{'role'}) { 587: $switchto .= '&role='.$form{'role'}; 588: } 589: if ($form{'symb'}) { 590: $switchto .= '&symb='.$form{'symb'}; 591: } 592: $r->internal_redirect($switchto); 593: } else { 594: $r->print(&noswitch()); 595: } 596: return OK; 597: } 598: 599: # ------------------------------------------------------- Do the load balancing 600: 601: # ---------------------------------------------------------- Determine own load 602: my $loadlim = $r->dir_config('lonLoadLim'); 603: my $loadavg; 604: { 605: my $loadfile=Apache::File->new('/proc/loadavg'); 606: $loadavg=<$loadfile>; 607: } 608: $loadavg =~ s/\s.*//g; 609: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 610: my $userloadpercent=&Apache::lonnet::userload(); 611: 612: # ---------------------------------------------------------- Are we overloaded? 613: if ((($userloadpercent>100.0)||($loadpercent>100.0))) { 614: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); 615: if (!$unloaded) { 616: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); 617: } 618: if ($unloaded) { 619: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', 620: undef,\%form); 621: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); 622: return OK; 623: } 624: } 625: if (($is_balancer) && ($hosthere)) { 626: $form{'noloadbalance'} = $hosthere; 627: } 628: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, 629: \%form); 630: return OK; 631: } 632: } 633: 634: sub check_can_host { 635: my ($r,$form,$authhost,$domdesc) = @_; 636: return unless (ref($form) eq 'HASH'); 637: my $canhost = 1; 638: my $lonhost = $r->dir_config('lonHostID'); 639: my $udom = $form->{'udom'}; 640: my @intdoms; 641: my $internet_names = &Apache::lonnet::get_internet_names($lonhost); 642: if (ref($internet_names) eq 'ARRAY') { 643: @intdoms = @{$internet_names}; 644: } 645: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 646: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 647: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 648: my $machine_dom = &Apache::lonnet::host_domain($lonhost); 649: my $hostname = &Apache::lonnet::hostname($lonhost); 650: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); 651: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); 652: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); 653: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); 654: my $loncaparev; 655: if ($authhost eq 'no_account_on_host') { 656: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); 657: } else { 658: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); 659: } 660: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, 661: $udomdefaults{'remotesessions'}, 662: $defdomdefaults{'hostedsessions'}); 663: } 664: unless ($canhost) { 665: if ($authhost eq 'no_account_on_host') { 666: my $checkloginvia = 1; 667: my ($login_host,$hostname) = 668: &Apache::lonnet::choose_server($udom,$checkloginvia); 669: &Apache::loncommon::content_type($r,'text/html'); 670: $r->send_http_header; 671: if ($login_host ne '') { 672: my $protocol = $Apache::lonnet::protocol{$login_host}; 673: $protocol = 'http' if ($protocol ne 'https'); 674: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; 675: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). 676: '<h3>'.&mt('Account creation').'</h3>'. 677: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 678: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. 679: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). 680: &Apache::loncommon::end_page()); 681: } else { 682: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 683: '<h3>'.&mt('Account creation unavailable').'</h3>'. 684: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 685: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. 686: &Apache::loncommon::end_page()); 687: } 688: } else { 689: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, 690: $form); 691: my ($otherserver) = &Apache::lonnet::choose_server($udom); 692: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); 693: } 694: } 695: return $canhost; 696: } 697: 698: sub noswitch { 699: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 700: '<h3>'.&mt('Session unavailable').'</h3>'. 701: &mt('This LON-CAPA server is unable to host your session.').'<br />'. 702: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'. 703: &Apache::loncommon::end_page(); 704: return $result; 705: } 706: 707: sub loginhelpdisplay { 708: my ($authdomain) = @_; 709: my $login_help = 1; 710: my $lang = &Apache::lonlocal::current_language(); 711: if ($login_help) { 712: my $dom = $authdomain; 713: if ($dom eq '') { 714: $dom = &Apache::lonnet::default_login_domain(); 715: } 716: my %domconfhash = &Apache::loncommon::get_domainconf($dom); 717: my $loginhelp_url; 718: if ($lang) { 719: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang}; 720: if ($loginhelp_url ne '') { 721: return $loginhelp_url; 722: } 723: } 724: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'}; 725: if ($loginhelp_url ne '') { 726: return $loginhelp_url; 727: } else { 728: return '/adm/loginproblems.html'; 729: } 730: } 731: return; 732: } 733: 734: 1; 735: __END__ 736: 737: