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    1: #!/usr/bin/perl
    2: # The LearningOnline Network with CAPA
    3: # Generate Guest Users on NSDL Server
    4: #
    5: # Only works on a library server!!!
    6: # Has to be the only library server in the domain!!!
    7: # Should not be used on a real production server.
    8: 
    9: use strict;
   10: 
   11: my $demodomain='nsdl';
   12: my $demohome='nsdll1';
   13: my $admemail='lon-capa@lon-capa.org';
   14: my $demoserver='nsdl.lon-capa.org';
   15: 
   16: 
   17: 
   18: my %perlvar=();
   19: my %form=();
   20: my %democourses=();
   21: my $courses;
   22: my %hostname=();
   23: my %hostdom=();
   24: my %domaindescription=();
   25: my %libserv=();
   26: my %hostip=();
   27: 
   28: my $firsturl=&unescape($ENV{'QUERY_STRING'});
   29: unless ($firsturl=~/^\//) { $firsturl='/'.$firsturl; }
   30: 
   31:     my %formfields=('afirst' => 'First Name',
   32:                     'blast'  => 'Last Name',
   33:                     'ctitle' => 'Title',
   34:                     'dinst'  => 'Company/School',
   35:                     'eaddr'  => 'Street Address',
   36:                     'fcity'  => 'City, State, ZIP',
   37:                     'gemail' => 'EMail Address',
   38:                     'huser'  => 'Desired Username',
   39:                     'icomm'  => 'Area of Interest/Comments');
   40: 
   41: use lib '/home/httpd/lib/perl/';
   42: use LONCAPA::Configuration;
   43: 
   44: use IO::File;
   45: use IO::Socket;
   46: 
   47: 
   48: # ------------------------------------------------------------- Declutters URLs
   49: 
   50: sub declutter {
   51:     my $thisfn=shift;
   52:     $thisfn=~s/^$perlvar{'lonDocRoot'}//;
   53:     $thisfn=~s/^\///;
   54:     $thisfn=~s/^res\///;
   55:     $thisfn=~s/\?.+$//;
   56:     return $thisfn;
   57: }
   58: 
   59: # -------------------------------------------------------- Escape Special Chars
   60: 
   61: sub escape {
   62:     my $str=shift;
   63:     $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
   64:     return $str;
   65: }
   66: 
   67: # ----------------------------------------------------- Un-Escape Special Chars
   68: 
   69: sub unescape {
   70:     my $str=shift;
   71:     $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
   72:     return $str;
   73: }
   74: 
   75: 
   76: # ------------------------------------------------------------------- Log stuff
   77: 
   78: sub logthis {
   79: 
   80:     my $message=shift;
   81:     my $execdir=$perlvar{'lonDaemons'};
   82:     my $now=time;
   83:     my $local=localtime($now);
   84:     open(FH,">>$execdir/logs/demo.log");
   85:     print FH "$local ($$): $message\n";
   86:     close(FH);
   87:     return 1;
   88: }
   89: # -------------------------------------------------- Non-critical communication
   90: sub reply {
   91:     my ($cmd,$server)=@_;
   92:     my $peerfile="$perlvar{'lonSockDir'}/$server";
   93:     my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",
   94:                                      Type    => SOCK_STREAM,
   95:                                      Timeout => 10)
   96:        or return "con_lost";
   97:     print $client "$cmd\n";
   98:     my $answer=<$client>;
   99:     chomp($answer);
  100:     if (!$answer) { $answer="con_lost"; }
  101:     return $answer;
  102: }
  103: 
  104: 
  105: sub put {
  106:    my ($namespace,$storehash,$udomain,$uname)=@_;
  107:    my $uhome=&homeserver($uname,$udomain);
  108:    my $items='';
  109:    foreach (keys %$storehash) {
  110:        $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
  111:    }
  112:    $items=~s/\&$//;
  113:    return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
  114: }
  115: 
  116: 
  117: # ------------- Modified routines from lonnet to make a new student in a course
  118: 
  119: # ---------------------- Find the homebase for a user from domain's lib servers
  120: 
  121: sub homeserver {
  122:     my ($uname,$udom)=@_;
  123:     my $index="$uname:$udom";
  124:     my $tryserver;
  125:     foreach $tryserver (keys %libserv) {
  126: 	if ($hostdom{$tryserver} eq $udom) {
  127:            my $answer=reply("home:$udom:$uname",$tryserver);
  128:            if ($answer eq 'found') { 
  129:               return $tryserver; 
  130:            } 
  131:        }
  132:     }    
  133:     return 'no_host';
  134: }
  135: 
  136: 
  137: # ----------------------------------------------------------------- Assign Role
  138: 
  139: sub assignrole {
  140:     my ($uname,$url,$role,$end,$start)=@_;
  141:     my $command="encrypt:rolesput:$demodomain:auto:".
  142:                 "$demodomain:$uname:$url".'_'."$role=$role";
  143:     if ($end) { $command.='_'.$end; }
  144:     if ($start) {
  145: 	if ($end) { 
  146:            $command.='_'.$start; 
  147:         } else {
  148:            $command.='_0_'.$start;
  149:         }
  150:     }
  151:     return &reply($command,$demohome);
  152: }
  153: 
  154: # --------------------------------------------------------------- Modify a user
  155: 
  156: sub modifyuser {
  157:     my ($uname, $upass, $first,  $last)=@_;
  158:     my $udom=$demodomain;
  159:     my $desiredhome=$demohome;
  160:     my $middle='';
  161:     my $gene='';
  162:     my $umode='internal';
  163:     $udom=~s/\W//g;
  164:     $uname=~s/\W//g;
  165:     &logthis('Call to modify user '.$udom.', '.$uname.', '.
  166:              $umode.', '.$first.', '.
  167: 	     $last.', '.$desiredhome);
  168:     my $uhome=$demohome;
  169: # ----------------------------------------------------------------- Create User
  170:     if (($umode) && ($upass)) {
  171:         my $unhome=$desiredhome;
  172:         if (($unhome eq '') || ($unhome eq 'no_host')) {
  173: 	    return 'error: unable to find a home server for '.$uname.
  174:                    ' in domain '.$udom;
  175:         }
  176:         my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
  177:                          &escape($upass),$unhome);
  178: 	unless ($reply eq 'ok') {
  179:             return 'error makeuser '.$udom.' '.$unhome.': '.$reply;
  180:         }   
  181:         $uhome=&homeserver($uname,$udom,'true');
  182:         if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
  183: 	    return 'error: verify home';
  184:         }
  185:     }   # End of creation of new user
  186: 
  187: # -------------------------------------------------------------- Add names, etc
  188:     my %names;
  189:     if ($first)  { $names{'firstname'}  = $first; }
  190:     if ($last)   { $names{'lastname'}   = $last; }
  191:     my $reply = &put('environment', \%names, $udom,$uname);
  192:     if ($reply ne 'ok') { return 'error: '.$reply; }
  193:     &logthis('Success modifying user '.$udom.', '.$uname.', '.
  194:              $umode.', '.$first.', '.
  195: 	     $last);
  196:     return 'ok';
  197: }
  198: 
  199: # -------------------------------------------------------------- Modify student
  200: 
  201: sub modifyrole {
  202:     my ($uname,$upass,$first,$last)=@_;
  203:     my $udom=$demodomain;
  204:     my $start=time;
  205:     my $end=$start+60*60*24*100;
  206: # --------------------------------------------------------------- Make the user
  207:     my $reply=&modifyuser($uname,$upass,$first,$last);
  208:     unless ($reply eq 'ok') { return $reply; }
  209: 
  210: # ------------------------------------------------------ Add guest role to user
  211:     return &assignrole($uname,'nsdl','dg',$end,$start);
  212: }
  213: 
  214: sub enroll {
  215:     my ($uname,$upass,$first,$last)=@_;
  216:     &logthis("Going to enroll $uname as guest");
  217:     my $returnval.=
  218:          &modifyrole($uname,$upass,$first,$last)."<br>\n";
  219:     return $returnval;
  220: }
  221: # ------------------------------------------------------------- Make a password
  222: 
  223: sub genpass {
  224:     srand($$);
  225:     my @chars=('A'..'Z','a'..'z',0..9);
  226:     return join('',@chars[map{ rand @chars } (1..8)]);
  227: }
  228: 
  229: sub inputline {
  230:     my ($name,$output)=@_;
  231:     print "\n<tr><td>$output:</td><td>".
  232: "<input type='text' name='$name' value='$form{$name}' size='40'></td></tr>";
  233: }
  234: 
  235: sub makeform {
  236:     print 
  237:    "\n<form method='post'><p>After successful generation of a username, ".
  238:    "the access information will be emailed to you.<p><table>";
  239:     foreach (sort keys %formfields) {
  240: 	&inputline($_,$formfields{$_});
  241:     }
  242:     print "</table>\n<input type='hidden' name='courses' value='$courses'>".
  243:           "<input name='submitted' value='Generate Guest User' type='submit'>".
  244:           "</form>\n";
  245: }
  246: 
  247: # ----------------------------------------- Check the user supplied information
  248: sub errorwrap {
  249:     my $msg=shift;
  250:     return '<font color="red">'.$msg.'</font>';
  251: }
  252: 
  253: sub checkform {
  254:     unless ($form{'submitted'}) {
  255: 	return 'Please fill out the form below to generate a guest user.';
  256:     }
  257: # --- Sloppy check of email address
  258:     unless ($form{'gemail'}=~/^[^\@]+\@[^\@]+\.\w+$/) {
  259: 	return &errorwrap('Not a valid email address');
  260:     }
  261: # --- Check Username
  262:     $form{'huser'}=~s/[^A-Za-z0-9]//g;
  263:     $form{'huser'}=~tr/A-Z/a-z/;
  264:     $form{'huser'}=~s/^\d+//;
  265:     $form{'huser'}=substr($form{'huser'},0,10);
  266:     if (length($form{'huser'})<4) {
  267:         return &errorwrap('Username too short');
  268:     }
  269: # see if user exists
  270:     my $reply=&reply('home:'.$demodomain.':'.$form{'huser'},$demohome);
  271:     if ($reply eq 'found') {
  272: 	return &errorwrap('Username '.$form{'huser'}.' already exists.');
  273:     }
  274:     unless ($reply eq 'not_found') {
  275:         return &errorwrap('Sorry, guest logins currently not available.');
  276:     }
  277:     return 0;
  278: }
  279: 
  280: sub sendemail {
  281:     my $upass=shift;
  282:    open(MAILOUT,"|mail '$form{'gemail'}' -c '$admemail' -s 'Your LON-CAPA Guest Access Info'");
  283:    print MAILOUT "Welcome to LON-CAPA!\n\n";
  284:    print MAILOUT "Somebody at $ENV{'REMOTE_ADDR'}, probably you, signed up\n";
  285:    print MAILOUT "for an NSDL guest login to\n\n  http://$demoserver$firsturl?username=$form{'huser'}\n\n";
  286:    print MAILOUT "  Username: $form{'huser'}\n  Password: $upass\n\n";
  287:    print MAILOUT "\n\nThe guest access will remain valid for 100 days, and can be used for future access to NSDL resources within LON-CAPA\n\n";
  288:    print MAILOUT "Additional information provided was:\n\n";
  289:    foreach (sort keys %formfields) {
  290:       print MAILOUT '  '.$formfields{$_}.': '.$form{$_}."\n";
  291:    }
  292:    print MAILOUT "\nNSDL Guest User\n\nThank you for your interest in LON-CAPA!\n".&footer; 
  293:    close MAILOUT;
  294: }
  295: 
  296: sub footer {
  297:     return (<<'ENDFOOTER');
  298: --
  299: www.lon-capa.org
  300: lon-capa@lon-capa.org
  301: User Help: http://help.lon-capa.org/
  302: Bugs and Enhancements: http://bugs.lon-capa.org/
  303: Mailing Lists: http://mail.lon-capa.org/
  304: ENDFOOTER
  305: }
  306: # ================================================================ Main Program
  307: 
  308: print "Content-type: text/html\n\n".
  309:       "<html><head><title>LON-CAPA NSDL Guest Signup</title></head>".
  310:       "<body bgcolor='#BBBBAA'>\n".
  311: "<h1>Welcome to the Learning<i>Online</i> Network with CAPA NSDL Gateway Server!</h1><img src='/adm/lonDomLogos/nsdl.gif' align='right' />";
  312: 
  313: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
  314: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
  315:                                                  'loncapa.conf');
  316: %perlvar=%{$perlvarref};
  317: undef $perlvarref;
  318: delete $perlvar{'lonReceipt'};   # remove since sensitive and not needed
  319: delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
  320: 
  321: 
  322: # ------------------------------------------------------------- Read hosts file
  323: {
  324:     open(CONFIG,"$perlvar{'lonTabDir'}/hosts.tab");
  325: 
  326:     while (my $configline=<CONFIG>) {
  327:        chomp($configline);
  328:        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
  329:        $hostname{$id}=$name;
  330:        $hostdom{$id}=$domain;
  331:        $hostip{$id}=$ip;
  332:        if ($domdescr) {
  333: 	   $domaindescription{$domain}=$domdescr;
  334:        }
  335:        if ($role eq 'library') { $libserv{$id}=$name; }
  336:     }
  337:     close(CONFIG);
  338: }
  339: 
  340: 
  341: # --------------------------------------------------------------- Get post vars
  342: 
  343:             my $buffer;
  344:             read(STDIN,$buffer,$ENV{'CONTENT_LENGTH'});
  345: 
  346:             my @pairs=split(/&/,$buffer);
  347:             my $pair;
  348:             foreach $pair (@pairs) {
  349:                my ($name,$value) = split(/=/,$pair);
  350:                $value =~ tr/+/ /;
  351:                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  352:                $name  =~ tr/+/ /;
  353:                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  354:                $name  =~ s/[\~\'\"]//g;
  355:                $value =~ s/[\~\'\"]//g;
  356:                $form{$name}=$value;
  357:             }
  358: 
  359: my $error=&checkform();
  360: 
  361: if ($error) {
  362:     print "<p><b>$error</b>";
  363:     &makeform();
  364: } else {
  365:     my $upass=&genpass();
  366:     my $result=&enroll($form{'huser'},$upass,$form{'afirst'},$form{'blast'});
  367:     if ($result=~/error/) {
  368: 	&logthis($result);
  369:         print &errorwrap('Sorry, guest functionality currently not available');
  370:     } else {
  371:         print "Your access information will be emailed to ".$form{'gemail'};
  372:         &sendemail($upass);
  373:     }
  374: }
  375: # ------------------------------------------------------------------------- End
  376: 
  377:     print('<p><table bgcolor="#999999" width="100%" cellspacing="3"><tr><td bgcolor="#FFFFFF"><pre>'.&footer().'</pre></td><td bgcolor="#FFFFFF"><img src="/adm/lonIcons/SMETE_white.gif" align="right"></td></tr></table></body></html>');
  378: 1;
  379: 
  380: 
  381: 
  382: 
  383: 
  384: 
  385: 
  386: