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    1: #!/usr/bin/perl
    2: # The LearningOnline Network with CAPA
    3: # Generate Demo Users on Demo 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='msudemo';
   12: my $demohome='msudemol1';
   13: my $admemail='lon-capa@lon-capa.org';
   14: my $demoserver='demo.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: 	     $last);
  193:     return 'ok';
  194: }
  195: 
  196: # -------------------------------------------------------------- Modify student
  197: 
  198: sub modifystudent {
  199:     my ($uname,$upass,$first,$last,$cnum,$cdom,$chome)=@_;
  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: # -------------------------------------------------- Add student to course list
  207:     $reply=reply('put:'.$cdom.':'.$cnum.':classlist:'.
  208:                       &escape($uname.':'.$udom).'='.
  209:                       &escape($end.':'.$start),
  210: 	              $chome);
  211:     unless (($reply eq 'ok') || ($reply eq 'delayed')) {
  212: 	return "error course list ".$reply;
  213:     }
  214: # ---------------------------------------------------- Add student role to user
  215:     my $uurl='/'.$cdom.'_'.$cnum;
  216:     $uurl=~s/\_/\//g;
  217:     return &assignrole($uname,$uurl,'st',$end,$start);
  218: }
  219: 
  220: sub enroll {
  221:     my ($uname,$upass,$first,$last)=@_;
  222:     &logthis("Going to enroll $uname for $courses");
  223:     my $returnval='';
  224:     foreach (split(/\&/,$courses)) {
  225:       my ($cdom,$chome,$cid)=split(/\:/,$democourses{$_});
  226:       if ($cid) {
  227:         $returnval.=
  228:          &modifystudent
  229:  ($uname,$upass,$first,$last,$cid,$cdom,$chome)."<br>\n";
  230:       }
  231:     }
  232:     return $returnval;
  233: }
  234: # ------------------------------------------------------------- Make a password
  235: 
  236: sub genpass {
  237:     srand($$);
  238:     my @chars=('A'..'Z','a'..'z',0..9);
  239:     return join('',@chars[map{ rand @chars } (1..8)]);
  240: }
  241: 
  242: sub inputline {
  243:     my ($name,$output)=@_;
  244:     print "\n<tr><td>$output:</td><td>".
  245: "<input type='text' name='$name' value='$form{$name}' size='40'></td></tr>";
  246: }
  247: 
  248: sub makeform {
  249:     print 
  250:    "\n<form method='post'><p>After successful generation of a username, ".
  251:    "the access information will be emailed to you.<p><table>";
  252:     foreach (sort keys %formfields) {
  253: 	&inputline($_,$formfields{$_});
  254:     }
  255:     print "</table>\n<input type='hidden' name='courses' value='$courses'>".
  256:           "<input name='submitted' value='Generate Demo User' type='submit'>".
  257:           "</form>\n";
  258: }
  259: 
  260: # ----------------------------------------- Check the user supplied information
  261: sub errorwrap {
  262:     my $msg=shift;
  263:     return '<font color="red">'.$msg.'</font>';
  264: }
  265: 
  266: sub checkform {
  267:     unless ($form{'submitted'}) {
  268: 	return 'Please fill out the form below to generate a demo user.';
  269:     }
  270: # --- Sloppy check of email address
  271:     unless ($form{'gemail'}=~/^[^\@]+\@[^\@]+\.\w+$/) {
  272: 	return &errorwrap('Not a valid email address');
  273:     }
  274: # --- Check Username
  275:     $form{'huser'}=~s/[^A-Za-z0-9]//g;
  276:     $form{'huser'}=~tr/A-Z/a-z/;
  277:     $form{'huser'}=~s/^\d+//;
  278:     $form{'huser'}=substr($form{'huser'},0,10);
  279:     if (length($form{'huser'})<4) {
  280:         return &errorwrap('Username too short');
  281:     }
  282: # see if user exists
  283:     my $reply=&reply('home:'.$demodomain.':'.$form{'huser'},$demohome);
  284:     if ($reply eq 'found') {
  285: 	return &errorwrap('Username '.$form{'huser'}.' already exists.');
  286:     }
  287:     unless ($reply eq 'not_found') {
  288:         return &errorwrap('Sorry, demo logins currently not available.');
  289:     }
  290:     return 0;
  291: }
  292: 
  293: sub sendemail {
  294:     my $upass=shift;
  295:    open(MAILOUT,"|mail '$form{'gemail'}' -c '$admemail' -s 'Your LON-CAPA Demo Access Info'");
  296:    print MAILOUT "Welcome to LON-CAPA!\n\n";
  297:    print MAILOUT "Somebody at $ENV{'REMOTE_ADDR'}, probably you, signed up\n";
  298:    print MAILOUT "for a demo login to\n\n  http://$demoserver/\n\n";
  299:    print MAILOUT "  Username: $form{'huser'}\n  Password: $upass\n\n";
  300:    print MAILOUT "Additional information provided was:\n\n";
  301:    foreach (sort keys %formfields) {
  302:       print MAILOUT '  '.$formfields{$_}.': '.$form{$_}."\n";
  303:    }
  304:    print MAILOUT "\nCourse(s): $courses\n\nThank you for your interest in LON-CAPA!\n".&footer; 
  305:    close MAILOUT;
  306: }
  307: 
  308: sub readdemo {
  309:     open(IN,$perlvar{'lonTabDir'}.'/democourses.tab') || 
  310:         die "Could not open demo course file from ".$perlvar{'lonTabDir'};
  311:     while (my $line=<IN>) {
  312: 	chomp($line);
  313:         my ($name,$descr)=split(/\&/,$line);
  314:         $democourses{$name}=$descr;
  315:     }
  316:     close(IN);
  317: }
  318: 
  319: sub footer {
  320:     return (<<'ENDFOOTER');
  321: --
  322: www.lon-capa.org
  323: lon-capa@lon-capa.org
  324: User Help: http://help.lon-capa.org/
  325: Bugs and Enhancements: http://bugs.lon-capa.org/
  326: Mailing Lists: http://mail.lon-capa.org/
  327: ENDFOOTER
  328: }
  329: # ================================================================ Main Program
  330: 
  331: print "Content-type: text/html\n\n".
  332:       "<html><head><title>LON-CAPA Demo Signup</title></head>".
  333:       "<body bgcolor='#FFFFFF'>\n".
  334: "<h1>Welcome to the Learning<i>Online</i> Network with CAPA Demo Server!</h1>";
  335: 
  336: # ---------------------------------- Read loncapa_apache.conf and loncapa.conf
  337: my $perlvarref=LONCAPA::Configuration::read_conf('loncapa_apache.conf',
  338:                                                  'loncapa.conf');
  339: %perlvar=%{$perlvarref};
  340: undef $perlvarref;
  341: delete $perlvar{'lonReceipt'};   # remove since sensitive and not needed
  342: delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
  343: 
  344: &readdemo();
  345: 
  346: # ------------------------------------------------------------- Read hosts file
  347: {
  348:     open(CONFIG,"$perlvar{'lonTabDir'}/hosts.tab");
  349: 
  350:     while (my $configline=<CONFIG>) {
  351:        chomp($configline);
  352:        my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
  353:        $hostname{$id}=$name;
  354:        $hostdom{$id}=$domain;
  355:        $hostip{$id}=$ip;
  356:        if ($domdescr) {
  357: 	   $domaindescription{$domain}=$domdescr;
  358:        }
  359:        if ($role eq 'library') { $libserv{$id}=$name; }
  360:     }
  361:     close(CONFIG);
  362: }
  363: 
  364: 
  365: # --------------------------------------------------------------- Get post vars
  366: 
  367:             my $buffer;
  368:             read(STDIN,$buffer,$ENV{'CONTENT_LENGTH'});
  369: 
  370:             my @pairs=split(/&/,$buffer);
  371:             my $pair;
  372:             foreach $pair (@pairs) {
  373:                my ($name,$value) = split(/=/,$pair);
  374:                $value =~ tr/+/ /;
  375:                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  376:                $name  =~ tr/+/ /;
  377:                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  378:                $name  =~ s/[\~\'\"]//g;
  379:                $value =~ s/[\~\'\"]//g;
  380:                $form{$name}=$value;
  381:             }
  382: # ------------------------------------------------ Get courses from get, if any
  383: $courses=$ENV{'QUERY_STRING'};
  384: $courses =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  385: $courses =~ s/[^a-z\&]//g;
  386: unless ($courses) { $courses='default'; }
  387: # ------------------------------------------------------------ Check Form Input
  388: 
  389: my $error=&checkform();
  390: 
  391: if ($error) {
  392:     print "<p><b>$error</b>";
  393:     &makeform();
  394: } else {
  395:     my $upass=&genpass();
  396:     my $result=&enroll($form{'huser'},$upass,$form{'afirst'},$form{'blast'});
  397:     if ($result=~/error/) {
  398: 	&logthis($result);
  399:         print &errorwrap('Sorry, demo functionality currently not available');
  400:     } else {
  401:         print "Your access information will be emailed to ".$form{'gemail'};
  402:         &sendemail($upass);
  403:     }
  404: }
  405: # ------------------------------------------------------------------------- End
  406: 
  407:     print('<p><pre>'.&footer()."</pre></body></html>\n");
  408: 1;
  409: 
  410: 
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  416: