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Diff for /loncom/auth/lonauth.pm between versions 1.3 and 1.101.8.3

version 1.3, 1999/12/16 20:30:55 version 1.101.8.3, 2010/08/18 19:39:42
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # User Authentication Module  # User Authentication Module
 # 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 Gerd Kortemeyer  # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   
 package Apache::lonauth;  package Apache::lonauth;
   
   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 Apache::lonnet();  use Crypt::DES;
   use Apache::loncommon();
   use Apache::lonnet;
   use Apache::lonmenu();
   use Apache::createaccount;
   use Fcntl qw(:flock);
   use Apache::lonlocal;
   use HTML::Entities;
    
 # ------------------------------------------------------------ Successful login  # ------------------------------------------------------------ Successful login
   
 sub success {  sub success {
     my ($r, $lowerurl, $username, $domain, $authhost) = @_;      my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
     my $lonids=$r->dir_config('lonIDsDir');   $form) = @_;
 # See if old ID present, but overlooked  
     my $cookie;  # ------------------------------------------------------------ Get cookie ready
     if ($cookie=<$lonids/$username\_*\_$domain\_$authhost.id>) {      my $cookie =
  $cookie=~s/\.id//;   &Apache::loncommon::init_user_environment($r, $username, $domain,
         $cookie=~s/$lonids\///;    $authhost, $form,
     } else {    {'extra_env' => $extra_env,});
         my $now=time;  
         $cookie="$username\_$now\_$domain\_$authhost";      my $public=($username eq 'public' && $domain eq 'public');
         my $userroles=Apache::lonnet::reply(  
     "dump:$domain:$username:roles",      if ($public or $lowerurl eq 'noredirect') { return $cookie; }
                                             $authhost);  
         $userroles=~s/&/\n/g;  # -------------------------------------------------------------------- Log this
         {  
     my $idf=Apache::File->new(">$lonids/$cookie.id");      &Apache::lonnet::log($domain,$username,$authhost,
             print $idf "username=$username\n";                           "Login $ENV{'REMOTE_ADDR'}");
             print $idf "userdomain=$domain\n";  
             print $idf "userhome=$authhost\n";  # ------------------------------------------------- Check for critical messages
             print $idf "$userroles\n";  
       my @what=&Apache::lonnet::dump('critical',$domain,$username);
       if ($what[0]) {
    if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
       $lowerurl='/adm/email?critical=display';
         }          }
     }      }
   
   # ------------------------------------------------------------ Get cookie ready
     $cookie="lonID=$cookie; path=/";      $cookie="lonID=$cookie; path=/";
     $r->send_cgi_header(<<ENDHEADER);  # -------------------------------------------------------- Menu script and info
 Content-type: text/html      my $destination = $lowerurl;
 Set-cookie: $cookie  
       if (defined($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;
           }
       }
   
 ENDHEADER      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 $maincall=&Apache::lonmenu::maincall();
       my $brcrum = [{'href' => '',
                      '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
   
       &Apache::loncommon::content_type($r,'text/html');
       $r->header_out('Set-cookie' => $cookie);
       $r->send_http_header;
   
       my %lt=&Apache::lonlocal::texthash(
          'wel' => 'Welcome',
          'mes' => 'Welcome to the Learning<i>Online</i> Network with CAPA. Please wait while your session is being set up.',
          'pro' => 'Login problems?',
          'log' => 'loginproblems.html',
          );
     $r->print(<<ENDSUCCESS);      $r->print(<<ENDSUCCESS);
 <html>  $start_page
 <head>  $setflags
 <title>Successful Login to the LearningOnline Network</title>  $windowinfo
 </head>  <h1>$lt{'wel'}</h1>
 <frameset rows="80,*" border=0>  $lt{'mes'}<p>
 <frame scrolling="no" name="loncontrol" src="/adm/menu">  <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p>
 <frame name="loncontent" src="$lowerurl">  $remoteinfo
 </frameset>  $maincall
 </html>  $continuelink
   $end_page
 ENDSUCCESS  ENDSUCCESS
 }  }
   
 # --------------------------------------------------------------- Failed login!  # --------------------------------------------------------------- Failed login!
   
 sub failed {  sub failed {
     my ($r,$message) = @_;      my ($r,$message,$form) = @_;
     $r->send_cgi_header(<<ENDFHEADER);      my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,
 Content-type: text/html      {'no_inline_link' => 1,});
       my $retry = '/adm/login?username='.$form->{'uname'}.
 ENDFHEADER                  '&domain='.$form->{'udom'};
     $r->print(<<ENDFAILED);      if (exists($form->{role})) {
 <html>          $retry .= '&role='.$form->{role};
 <head>      }
 <title>Unsuccessful Login to the LearningOnline Network</title>      if (exists($form->{symb})) {
 </head>          $retry .= '&symb='.$form->{symb};
 <html>      }
 <body bgcolor="#FFFFFF">      my $end_page   = &Apache::loncommon::end_page();
 <h1>Sorry ...</h1>      &Apache::loncommon::content_type($r,'text/html');
 <h2>$message to use the Learning<i>Online</i> Network</h2>      $r->send_http_header;
 </body>      $r->print(
 </html>         $start_page
 ENDFAILED        .'<h1>'.&mt('Sorry ...').'</h1>'
         .'<p class="LC_warning">'.&mt($message).'</p>'
         .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>')
         .'</p>'
         .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>'
         .$end_page
       );
    }
   
   # ------------------------------------------------------------------ Rerouting!
   
   sub reroute {
       my ($r) = @_;
       &Apache::loncommon::content_type($r,'text/html');
       $r->send_http_header;
       my $msg='<h1>'.&mt('Sorry ...').'</h1>'
              .&mt('Please [_1]log in again[_2].');
       &Apache::loncommon::simple_error_page($r,'Rerouting',$msg);
 }  }
   
 # ---------------------------------------------------------------- Main handler  # ---------------------------------------------------------------- Main handler
   
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
       my $form;
   # Are we re-routing?
       if (-e '/home/httpd/html/lon-status/reroute.txt') {
    &reroute($r);
    return OK;
       }
   
       &Apache::lonlocal::get_language_handle($r);
   
   # -------------------------------- Prevent users from attempting to login twice
       my $handle = &Apache::lonnet::check_for_valid_session($r);
       if ($handle ne '') {
           my $lonidsdir=$r->dir_config('lonIDsDir');
           if ($handle=~/^publicuser\_/) {
   # For "public user" - remove it, we apparently really want to login
               unlink($r->dir_config('lonIDsDir')."/$handle.id");
           } else {
   # Indeed, a valid token is found
               &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
               &Apache::loncommon::content_type($r,'text/html');
               $r->send_http_header;
               my $start_page =
                   &Apache::loncommon::start_page('Already logged in');
               my $end_page =
                   &Apache::loncommon::end_page();
               my $dest = '/adm/roles';
               if ($env{'form.firsturl'} ne '') {
                   $dest = $env{'form.firsturl'};
               }
               $r->print(
                  $start_page
                 .'<h1>'.&mt('You are already logged in!').'</h1>'
                 .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
                       ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
                 .'</p>'
                 .$end_page
               );
               return OK;
           }
       }
   
   # ---------------------------------------------------- No valid token, continue
   
   
     my $buffer;      my $buffer;
     $r->read($buffer,$r->header_in('Content-length'));      if ($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; my %FORM;      }
     foreach $pair (@pairs) {      my %form;
        ($name,$value) = split(/=/,$pair);      foreach my $pair (split(/&/,$buffer)) {
        $FORM{$name}=$value;         my ($name,$value) = split(/=/,$pair);
          $value =~ tr/+/ /;
          $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
          $form{$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{'upass'} =~ s/\W//g;  # split user logging in and "su"-user
     $FORM{'udom'}  =~ s/\W//g;  
       ($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
   
       my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
                                         $form{'serverid'});
   
       if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) {
    &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
           return OK;
       } else {
    my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
      $form{'serverid'});
           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;
    }
       }
   
       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 $cipher;
       if ($Crypt::DES::VERSION>=2.03) {
    $cipher=new Crypt::DES $keybin;
       }
       else {
    $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))));
   
    $chunk.=
       $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16))));
   
    $chunk=substr($chunk,1,ord(substr($chunk,0,1)));
    $upass.=$chunk;
       }
   
 # ---------------------------------------------------------------- Authenticate  # ---------------------------------------------------------------- Authenticate
     my $authhost=Apache::lonnet::authenticate($FORM{'uname'},      my @cancreate;
                                               $FORM{'upass'},      my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$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');
               &check_can_host($r,\%form,'no_account_on_host',$domdesc);
               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;
           }
     }      }
   
     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));      if (($firsturl eq '') || 
     my $lonurl=$cookies{'lonURL'};   ($firsturl=~/^\/adm\/(logout|remote)/)) {
     if (!$lonurl) { failed($r,'Cookies need to be activated'); return OK; }   $firsturl='/adm/roles';
     my $lowerurl=$lonurl->value;      }
   # --------------------------------- 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');
    }
       }
   
     success($r,$lowerurl,$FORM{'uname'},$FORM{'udom'},$authhost);      &check_can_host($r,\%form,$authhost);
   
       if ($r->dir_config("lonBalancer") eq 'yes') {
    &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
    \%form);
           my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
    $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
       } else {
    &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
    \%form);
       }
     return OK;      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 ($authhost eq 'no_account_on_host') {
               my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom);
               &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());
               }
               return OK;
           } else {
               &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
                        $form);
               my ($otherserver) = &Apache::lonnet::choose_server($udom);
               $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
           }
       }
   }
   
 1;  1;
 __END__  __END__
   
   
Removed from v.1.3  
changed lines
  Added in v.1.101.8.3

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