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Diff for /loncom/auth/lonauth.pm between versions 1.60 and 1.101.8.7

version 1.60, 2003/11/21 22:10:25 version 1.101.8.7, 2011/09/27 20:18:45
Line 25 Line 25
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
 # 5/21/99,5/22,5/25,5/26,5/27,5/29,6/2,6/11,6/14,6/15  
 # 16/11,12/16,  
 # 1/14,2/24,2/28,2/29,3/7,5/29,5/30,5/31,6/1,6/5,6/29,  
 # 7/1,7/10,10/2,10/5,10/9,10/26,10/30,11/10,  
 # 05/28,05/29 Gerd Kortemeyer  
 # 07/28,08/03 Gerd Kortemeyer  
 # 8/20 Gerd Kortemeyer  
   
 package Apache::lonauth;  package Apache::lonauth;
   
 use strict;  use strict;
   use LONCAPA;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use Apache::File;  
 use CGI qw(:standard);  use CGI qw(:standard);
 use CGI::Cookie();  
 use DynaLoader; # for Crypt::DES version  use DynaLoader; # for Crypt::DES version
 use Crypt::DES;  use Crypt::DES;
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonnet();  use Apache::lonnet;
 use Apache::lonmenu();  use Apache::lonmenu();
   use Apache::createaccount;
 use Fcntl qw(:flock);  use Fcntl qw(:flock);
 use Apache::lonlocal;  use Apache::lonlocal;
   use HTML::Entities;
 my %FORM;   
   
 # ------------------------------------------------------------ Successful login  # ------------------------------------------------------------ Successful login
   
 sub success {  sub success {
     my ($r, $username, $domain, $authhost,$lowerurl) = @_;      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
     my $lonids=$r->dir_config('lonIDsDir');   $form) = @_;
   
 # See if old ID present, if so, remove  
   
     my $filename;  
     opendir(DIR,$lonids);  
     while ($filename=readdir(DIR)) {  
        if ($filename=~/^$username\_\d+\_$domain\_$authhost\.id$/) {  
   unlink($lonids.'/'.$filename);  
        }  
     }  
     closedir(DIR);  
   
 # Give them a new cookie  
   
     my $cookie;  
     my $now=time;  
     $cookie="$username\_$now\_$domain\_$authhost";  
   
 # Initialize roles  
   
     my $userroles=Apache::lonnet::rolesinit($domain,$username,$authhost);  
   
 # ------------------------------------ Check browser type and MathML capability  # ------------------------------------------------------------ Get cookie ready
       my $cookie =
    &Apache::loncommon::init_user_environment($r, $username, $domain,
     $authhost, $form,
     {'extra_env' => $extra_env,});
   
     my ($httpbrowser,$clientbrowser,$clientversion,$clientmathml,      my $public=($username eq 'public' && $domain eq 'public');
         $clientunicode,$clientos) = &Apache::loncommon::decode_user_agent($r);  
   
 # -------------------------------------- Any accessibility options to remember?      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
     if (($FORM{'interface'}) && ($FORM{'remember'} eq 'true')) {  
  foreach ('imagesuppress','appletsuppress',  
  'embedsuppress','fontenhance','blackwhite') {  
     if ($FORM{$_} eq 'true') {  
  &Apache::lonnet::put('environment',{$_ => 'on'},  
      $domain,$username);  
     } else {  
  &Apache::lonnet::del('environment',[$_],$domain,$username);  
     }  
  }  
     }  
 # ------------------------------------------------------------- Get environment  
   
     my $userenv;  
     my %userenv=Apache::lonnet::dump('environment',$domain,$username);  
     my ($tmp) = keys(%userenv);  
     if ($tmp !~ /^(con_lost|error|no_such_host)/i) {  
  foreach my $key (keys(%userenv)) {  
     $userenv.="environment.$key=$userenv{$key}\n";  
  }  
     }  
     if (($userenv{'interface'}) && (!$FORM{'interface'})) {  
  $FORM{'interface'}=$userenv{'interface'};  
     }  
     $ENV{'environment.remote'}=$userenv{'remote'};  
 # --------------- Do not trust query string to be put directly into environment  
     foreach ('imagesuppress','appletsuppress',  
      'embedsuppress','fontenhance','blackwhite',  
      'interface','localpath','localres') {  
  $FORM{$_}=~s/[\n\r\=]//gs;  
     }  
 # --------------------------------------------------------- Write first profile  
   
     {  
  my $idf=Apache::File->new(">$lonids/$cookie.id");  
  unless (flock($idf,LOCK_EX)) {  
     &Apache::lonnet::logthis("<font color=blue>WARNING: ".  
    'Could not obtain exclusive lock in lonauth: '.$!);  
     $idf->close();  
     return 'error: '.$!;  
  }  
  if ($userenv ne '') { print $idf "$userenv\n"; }  
  print $idf "user.name=$username\n";  
  print $idf "user.domain=$domain\n";  
  print $idf "user.home=$authhost\n";  
  print $idf "browser.type=$clientbrowser\n";  
  print $idf "browser.version=$clientversion\n";  
  print $idf "browser.mathml=$clientmathml\n";  
  print $idf "browser.unicode=$clientunicode\n";  
  print $idf "browser.os=$clientos\n";  
         if ($FORM{'localpath'}) {  
            print $idf "browser.localpath=$FORM{'localpath'}\n";  
            print $idf "browser.localres=$FORM{'localres'}\n";  
         }  
  print $idf "request.course.fn=\n";  
  print $idf "request.course.uri=\n";  
  print $idf "request.course.sec=\n";  
  print $idf "request.role=cm\n";  
         print $idf "request.role.adv=$ENV{'user.adv'}\n";  
  print $idf "request.host=$ENV{'REMOTE_ADDR'}\n";  
  if ($FORM{'interface'}) {  
     $FORM{'interface'}=~s/\W//gs;  
     print $idf "browser.interface=$FORM{'interface'}\n";  
     $ENV{'browser.interface'}=$FORM{'interface'};  
     foreach ('imagesuppress','appletsuppress',  
      'embedsuppress','fontenhance','blackwhite') {  
  if (($FORM{$_} eq 'true') ||  
     ($userenv{$_} eq 'on')) {  
     print $idf "browser.$_=on\n";  
  }  
     }  
  }  
  if ($userroles ne '') { print $idf "$userroles"; }  
  $idf->close();  
     }  
     $ENV{'request.role'}='cm';  
     $ENV{'request.role.adv'}=$ENV{'user.adv'};  
     $ENV{'browser.type'}=$clientbrowser;  
 # -------------------------------------------------------------------- Log this  # -------------------------------------------------------------------- Log this
   
     &Apache::lonnet::log($domain,$username,$authhost,      &Apache::lonnet::log($domain,$username,$authhost,
Line 176  sub success { Line 72  sub success {
     }      }
   
 # ------------------------------------------------------------ Get cookie ready  # ------------------------------------------------------------ Get cookie ready
   
     $cookie="lonID=$cookie; path=/";      $cookie="lonID=$cookie; path=/";
 # -------------------------------------------------------- Menu script and info  # -------------------------------------------------------- Menu script and info
     my $windowinfo=&Apache::lonmenu::open($clientos);      my $destination = $lowerurl;
     my $startupremote=&Apache::lonmenu::startupremote($lowerurl);  
       if (defined($form->{role})) {
           my $envkey = 'user.role.'.$form->{role};
           my $now=time;
           my $then=$env{'user.login.time'};
           my $refresh=$env{'user.refresh.time'};
           if (exists($env{$envkey})) {
               my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
               &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
                                            \$trolecode,\$tstatus,\$tstart,\$tend);
               if ($tstatus eq 'is') {
                   $destination  .= ($destination =~ /\?/) ? '&' : '?';
                   my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
                   $destination .= 'selectrole=1&'.$newrole.'=1';
               }
           }
       }
       if (defined($form->{symb})) {
           my $destsymb = $form->{symb};
           $destination  .= ($destination =~ /\?/) ? '&' : '?';
           if ($destsymb =~ /___/) {
               # FIXME Need to deal with encrypted symbs and urls as needed.
               my ($map,$resid,$desturl)=split(/___/,$destsymb);
               unless ($desturl=~/^(adm|uploaded|editupload|public)/) {
                   $desturl = &Apache::lonnet::clutter($desturl);
               }
               $desturl = &HTML::Entities::encode($desturl,'"<>&');
               $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
               $destination .= '&destinationurl='.$desturl.
                               '&destsymb='.$destsymb;
           } else {
               $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
               $destination .= '&destinationurl='.$destsymb;
           }
       }
   
       my $windowinfo=&Apache::lonmenu::open($env{'browser.os'});
       my $startupremote=&Apache::lonmenu::startupremote($destination);
       my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl);
     my $setflags=&Apache::lonmenu::setflags();      my $setflags=&Apache::lonmenu::setflags();
     my $maincall=&Apache::lonmenu::maincall();      my $maincall=&Apache::lonmenu::maincall();
     my $bodytag=&Apache::loncommon::bodytag('Successful Login');      my $brcrum = [{'href' => '',
     my $add=&addcontent();                     'text' => 'Successful Login'},];
       my $start_page=&Apache::loncommon::start_page('Successful Login',
                                                     $startupremote,
                                                     {'no_inline_link' => 1,
                                                      'bread_crumbs' => $brcrum,});
       my $end_page  =&Apache::loncommon::end_page();
   
       my $continuelink;
       if ($env{'environment.remote'} eq 'off') {
    $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
       }
 # ------------------------------------------------- Output for successful login  # ------------------------------------------------- Output for successful login
   
     $r->send_cgi_header(<<ENDHEADER);      &Apache::loncommon::content_type($r,'text/html');
 Content-type: text/html$add      $r->header_out('Set-cookie' => $cookie);
 Set-cookie: $cookie      $r->send_http_header;
   
 ENDHEADER  
     my %lt=&Apache::lonlocal::texthash(      my %lt=&Apache::lonlocal::texthash(
        'wel' => 'Welcome',         'wel' => 'Welcome',
        'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up',         'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
        'pro' => 'Problems',         'pro' => 'Login problems?',
        'log' => 'loginproblems.html',         'log' => 'loginproblems.html',
        );         );
     $r->print(<<ENDSUCCESS);      $r->print(<<ENDSUCCESS);
 <html>  $start_page
 <head>  
 <title>Successful Login to the LearningOnline Network with CAPA</title>  
 $startupremote  
 </head>  
 $bodytag  
 $setflags  $setflags
 $windowinfo  $windowinfo
 <h1>$lt{'wel'}</h1>  <h1>$lt{'wel'}</h1>
 $lt{'mes'}.<p>  $lt{'mes'}<p>
 <a href="/adm/$lt{'log'}">$lt{'pro'}?</a></p>  <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
   $remoteinfo
 $maincall  $maincall
 </body>  $continuelink
 </html>  $end_page
 ENDSUCCESS  ENDSUCCESS
 }  }
   
 # --------------------------------------------------------------- Failed login!  # --------------------------------------------------------------- Failed login!
   
 sub failed {  sub failed {
     my ($r,$message) = @_;      my ($r,$message,$form) = @_;
     my $bodytag=&Apache::loncommon::bodytag('Unsuccessful Login');      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
     my $add=&addcontent();      {'no_inline_link' => 1,});
     $r->send_cgi_header(<<ENDFHEADER);      my $retry = '/adm/login?username='.$form->{'uname'}.
 Content-type: text/html$add                  '&domain='.$form->{'udom'};
       if (exists($form->{role})) {
 ENDFHEADER          $retry .= '&role='.$form->{role};
     $r->print(<<ENDFAILED);      }
 <html>      if (exists($form->{symb})) {
 <head>          $retry .= '&symb='.$form->{symb};
 <title>Unsuccessful Login to the LearningOnline Network with CAPA</title>      }
 </head>      my $end_page   = &Apache::loncommon::end_page();
 <html>      &Apache::loncommon::content_type($r,'text/html');
 $bodytag      $r->send_http_header;
 <h1>Sorry ...</h1>      $r->print(
 <p><b>$message</b></p>         $start_page
 <p>Please <a href="/adm/login?username=$FORM{'uname'}&domain=$FORM{'udom'}">log in again</a>.</p>        .'<h1>'.&mt('Sorry ...').'</h1>'
 <p>        .'<p class="LC_warning">'.&mt($message).'</p>'
 <a href="/adm/loginproblems.html">Problems?</a></p>        .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
 </body>        .'</p>'
 </html>        .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
 ENDFAILED        .$end_page
 }      );
    }
 # --------------------------------------------------------------------- Charset  
   
 sub addcontent {  
     my $encoding=&Apache::lonlocal::current_encoding;  
     if ($encoding) {  
  return '; charset='.$encoding;  
     } else {  
  return '';  
     }  
 }  
   
 # ------------------------------------------------------------------ Rerouting!  # ------------------------------------------------------------------ Rerouting!
   
 sub reroute {  sub reroute {
     my $r=shift;      my ($r) = @_;
     my $bodytag=&Apache::loncommon::bodytag('Rerouting');      &Apache::loncommon::content_type($r,'text/html');
     $r->send_cgi_header(<<ENDRFHEADER);      $r->send_http_header;
 Content-type: text/html      my $msg='<h1>'.&mt('Sorry ...').'</h1>'
              .&mt('Please [_1]log in again[_2].');
 ENDRFHEADER      &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
     $r->print(<<ENDRFAILED);  
 <html>  
 <head>  
 <title>Rerouting Login to the LearningOnline Network with CAPA</title>  
 </head>  
 <html>  
 $bodytag  
 <h1>Sorry ...</h1>  
 Please <a href="/">log in again</a>.  
 </body>  
 </html>  
 ENDRFAILED  
 }  }
   
 # ---------------------------------------------------------------- Main handler  # ---------------------------------------------------------------- Main handler
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
       my $form;
 # Are we re-routing?  # Are we re-routing?
     if (-e '/home/httpd/html/lon-status/reroute.txt') {      if (-e '/home/httpd/html/lon-status/reroute.txt') {
  &reroute($r);   &reroute($r);
Line 291  sub handler { Line 207  sub handler {
     &Apache::lonlocal::get_language_handle($r);      &Apache::lonlocal::get_language_handle($r);
   
 # -------------------------------- Prevent users from attempting to login twice  # -------------------------------- Prevent users from attempting to login twice
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      my $handle = &Apache::lonnet::check_for_valid_session($r);
     my $lonid=$cookies{'lonID'};      if ($handle ne '') {
     my $cookie;  
     if ($lonid) {  
  my $handle=$lonid->value;  
         $handle=~s/\W//g;  
         my $lonidsdir=$r->dir_config('lonIDsDir');          my $lonidsdir=$r->dir_config('lonIDsDir');
         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {          if ($handle=~/^publicuser\_/) {
   # For "public user" - remove it, we apparently really want to login
               unlink($r->dir_config('lonIDsDir')."/$handle.id");
           } else {
 # Indeed, a valid token is found  # Indeed, a valid token is found
     $r->send_cgi_header(<<ENDFHEADER);              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
 Content-type: text/html              &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
 ENDFHEADER              my $start_page =
     my $bodytag=&Apache::loncommon::bodytag('Already logged in');                  &Apache::loncommon::start_page('Already logged in');
     $r->print(<<ENDFAILED);              my $end_page =
 <html>                  &Apache::loncommon::end_page();
 <head>              my $dest = '/adm/roles';
 <title>Already logged in</title>              if ($env{'form.firsturl'} ne '') {
 </head>                  $dest = $env{'form.firsturl'};
 <html>              }
 $bodytag              $r->print(
 <h1>You are already logged in</h1>                 $start_page
 <p>Please either <a href="/adm/roles">continue the current session</a> or                .'<h1>'.&mt('You are already logged in!').'</h1>'
 <a href="/adm/logout">logout</a>.</p>                .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
 <p>                      ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
 <a href="/adm/loginproblems.html">Problems?</a></p>                .'</p>'
 </body>                .$end_page
 </html>              );
 ENDFAILED              return OK;
            return OK;          }
  }  
     }      }
   
 # ---------------------------------------------------- No valid token, continue  # ---------------------------------------------------- No valid token, continue
   
   
     my $buffer;      my $buffer;
     $r->read($buffer,$r->header_in('Content-length'),0);      if ($r->header_in('Content-length') > 0) {
     my @pairs=split(/&/,$buffer);   $r->read($buffer,$r->header_in('Content-length'),0);
     my $pair; my $name; my $value;      }
     undef %FORM;      my %form;
     %FORM=();      foreach my $pair (split(/&/,$buffer)) {
     foreach $pair (@pairs) {         my ($name,$value) = split(/=/,$pair);
        ($name,$value) = split(/=/,$pair);  
        $value =~ tr/+/ /;         $value =~ tr/+/ /;
        $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;         $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
        $FORM{$name}=$value;         $form{$name}=$value;
     }       } 
   
     if ((!$FORM{'uname'}) || (!$FORM{'upass'}) || (!$FORM{'udom'})) {      if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
  failed($r,'Username, password and domain need to be specified.');   &failed($r,'Username, password and domain need to be specified.',
    \%form);
         return OK;          return OK;
     }      }
     $FORM{'uname'} =~ s/\W//g;  
     $FORM{'udom'}  =~ s/\W//g;  # split user logging in and "su"-user
   
       ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
       $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
       $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
       $form{'udom'}  = &LONCAPA::clean_domain(  $form{'udom'});
   
     my $role   = $r->dir_config('lonRole');      my $role   = $r->dir_config('lonRole');
     my $domain = $r->dir_config('lonDefDomain');      my $domain = $r->dir_config('lonDefDomain');
     my $prodir = $r->dir_config('lonUsersDir');      my $prodir = $r->dir_config('lonUsersDir');
       my $contact_name = &mt('LON-CAPA helpdesk');
   
 # ---------------------------------------- Get the information from login token  # ---------------------------------------- Get the information from login token
   
     my $tmpinfo=Apache::lonnet::reply('tmpget:'.$FORM{'logtoken'},      my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                       $FORM{'serverid'});                                        $form{'serverid'});
   
     if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {      if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
  failed($r,'Information needed to verify your login information is missing, inaccessible or expired.');         ($tmpinfo eq 'no_such_host')) {
    &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
         return OK;          return OK;
     } else {      } else {
         unless (&Apache::lonnet::reply('tmpdel:'.$FORM{'logtoken'},   my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
                                          $FORM{'serverid'}) eq 'ok') {     $form{'serverid'});
             &failed($r,'Session could not be opened.');          if ( $reply ne 'ok' ) {
               &failed($r,'Session could not be opened.',\%form);
       &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
       return OK;
  }   }
     }      }
     my ($key,$firsturl)=split(/&/,$tmpinfo);  
       if (!&Apache::lonnet::domain($form{'udom'})) {
           &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
           return OK;
       }
   
       my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
       if ($rolestr) {
           $rolestr = &unescape($rolestr);
       }
       if ($symbstr) {
           $symbstr= &unescape($symbstr);
       }
       if ($rolestr =~ /^role=/) {
           (undef,$form{'role'}) = split('=',$rolestr);
       }
       if ($symbstr =~ /^symb=/) { 
           (undef,$form{'symb'}) = split('=',$symbstr);
       }
   
     my $keybin=pack("H16",$key);      my $keybin=pack("H16",$key);
   
Line 376  ENDFAILED Line 318  ENDFAILED
     else {      else {
  $cipher=new DES $keybin;   $cipher=new DES $keybin;
     }      }
       my $upass='';
       for (my $i=0;$i<=2;$i++) {
    my $chunk=
       $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16))));
   
     my $upass=$cipher->decrypt(   $chunk.=
        unpack("a8",pack("H16",substr($FORM{'upass'},0,16))));      $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
   
     $upass.=$cipher->decrypt(  
        unpack("a8",pack("H16",substr($FORM{'upass'},16,16))));  
   
     $upass=substr($upass,1,ord(substr($upass,0,1)));   $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
    $upass.=$chunk;
       }
   
 # ---------------------------------------------------------------- Authenticate  # ---------------------------------------------------------------- Authenticate
     my $authhost=Apache::lonnet::authenticate($FORM{'uname'},      my @cancreate;
                                               $upass,      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
                                               $FORM{'udom'});      if (ref($domconfig{'usercreation'}) eq 'HASH') {
           if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
               if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
                   @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
               } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 
                        ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
                   @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
               }
           }
       }
       my $defaultauth;
       if (grep(/^login$/,@cancreate)) {
           $defaultauth = 1;
       }
       my $clientcancheckhost = 1;
       my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
                                                 $form{'udom'},$defaultauth,
                                                 $clientcancheckhost);
           
 # --------------------------------------------------------------------- Failed?  # --------------------------------------------------------------------- Failed?
   
     if ($authhost eq 'no_host') {      if ($authhost eq 'no_host') {
  failed($r,'Username and/or password could not be authenticated.');   &failed($r,'Username and/or password could not be authenticated.',
    \%form);
         return OK;          return OK;
       } elsif ($authhost eq 'no_account_on_host') {
           my %domconfig = 
               &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
           if (grep(/^login$/,@cancreate)) {
               my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
               unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
                   return OK;     
               }
               my $start_page = 
                   &Apache::loncommon::start_page('Create a user account in LON-CAPA',
                                                  '',{'no_inline_link'   => 1,});
               my $lonhost = $r->dir_config('lonHostID');
               my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
               my $contacts = 
                   &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                                           $form{'udom'},$origmail);
               my ($contact_email) = split(',',$contacts); 
               my $output = &Apache::createaccount::username_check($form{'uname'}, 
                                                                   $form{'udom'},$domdesc,'',
                                                                   $lonhost,$contact_email,$contact_name);
               &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
               &Apache::createaccount::print_header($r,$start_page);
               $r->print('<h3>'.&mt('Account creation').'</h3>'.
                         &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
                         $output.&Apache::loncommon::end_page());
               return OK;
           } else {
               &failed($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);
               return OK;
           }
     }      }
   
     if (($firsturl eq '') ||       if (($firsturl eq '') || 
  ($firsturl=~/^\/adm\/(logout|remote)/)) {   ($firsturl=~/^\/adm\/(logout|remote)/)) {
  $firsturl='/adm/roles';   $firsturl='/adm/roles';
     }      }
   # --------------------------------- Are we attempting to login as somebody else?
       if ($form{'suname'}) {
   # ------------ see if the original user has enough privileges to pull this stunt
    if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
   # ---------------------------------------------------- see if the su-user exists
       unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
    eq 'no_host') {
    &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
   # ------------------------------ see if the su-user is not too highly privileged
    unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
   # -------------------------------------------------------- actually switch users
       &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
    ' logging in as '.$form{'suname'});
       $form{'uname'}=$form{'suname'};
    } else {
       &Apache::lonnet::logthis('Attempted switch user to privileged user');
    }
       }
    } else {
       &Apache::lonnet::logthis('Non-privileged user attempting switch user');
    }
       }
   
       if ($r->dir_config("lonBalancer") eq 'yes') {
           my $otherserver = &Apache::lonnet::spareserver(30000,undef,1,$form{'udom'});
           if (!$otherserver) {
               ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
           }
           if ($otherserver) {
               &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                        \%form);
               $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
           } else {
               $r->print(&noswitch());
           }
           return OK;
       } else {
           if (!&check_can_host($r,\%form,$authhost)) {
               my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
               if ($otherserver) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
                            \%form);
                   $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl);
               } else {
                   $r->print(&noswitch());
               }
               return OK;
           }
   # ------------------------------------------------------- Do the load balancing
   
   # ---------------------------------------------------------- Determine own load
           my $loadlim = $r->dir_config('lonLoadLim');
           my $loadavg;
           {
               my $loadfile=Apache::File->new('/proc/loadavg');
               $loadavg=<$loadfile>;
           }
           $loadavg =~ s/\s.*//g;
           my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
           my $userloadpercent=&Apache::lonnet::userload();
   
   # ---------------------------------------------------------- Are we overloaded?
           if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
               my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
               if (!$unloaded) {
                   ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
               }
               if ($unloaded) {
                   &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
                            undef,\%form);
                   $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
                   return OK;
               }
           }
           &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
                    \%form);
           return OK;
       }
   }
   
   sub check_can_host {
       my ($r,$form,$authhost,$domdesc) = @_;
       return unless (ref($form) eq 'HASH');
       my $canhost = 1;
       my $lonhost = $r->dir_config('lonHostID');
       my $udom = $form->{'udom'};
       my @intdoms;
       my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
       if (ref($internet_names) eq 'ARRAY') {
           @intdoms = @{$internet_names};
       }
       my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
       my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
       unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
           my $machine_dom = &Apache::lonnet::host_domain($lonhost);
           my $hostname = &Apache::lonnet::hostname($lonhost);
           my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
           my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
           my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
           my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
           my $loncaparev;
           if ($authhost eq 'no_account_on_host') {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
           } else {
               $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
           }
           $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
                                                        $udomdefaults{'remotesessions'},
                                                        $defdomdefaults{'hostedsessions'});
       }
       unless ($canhost) {
           if ($authhost eq 'no_account_on_host') {
               my $checkloginvia = 1;
               my ($login_host,$hostname) =
                   &Apache::lonnet::choose_server($udom,$checkloginvia);
               &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
               if ($login_host ne '') {
                   my $protocol = $Apache::lonnet::protocol{$login_host};
                   $protocol = 'http' if ($protocol ne 'https');
                   my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
                   $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
                             '<h3>'.&mt('Account creation').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
                             '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
                             &Apache::loncommon::end_page());
               } else {
                   $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                             '<h3>'.&mt('Account creation unavailable').'</h3>'.
                             &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
                             '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
                             &Apache::loncommon::end_page());
               }
           } else {
               &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                        $form);
               my ($otherserver) = &Apache::lonnet::choose_server($udom);
               $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
           }
       }
       return $canhost;
   }
   
     success($r,$FORM{'uname'},$FORM{'udom'},$authhost,$firsturl);  sub noswitch {
     return OK;      my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
                    '<h3>'.&mt('Session unavailable').'</h3>'.
                    &mt('This LON-CAPA server is unable to host your session.').'<br />'.
                    '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
                    &Apache::loncommon::end_page();
       return $result;
 }  }
   
 1;  1;
Removed from v.1.60  
changed lines
  Added in v.1.101.8.7

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