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Generate Guest User Account on NSDL Gateway Server

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