File:  [LON-CAPA] / loncom / auth / lonacc.pm
Revision 1.137: download - view: text, annotated - select for diffs
Tue Aug 9 01:35:31 2011 UTC (12 years, 9 months ago) by raeburn
Branches: MAIN
CVS tags: language_hyphenation_merge, language_hyphenation, HEAD, BZ4492-merge, BZ4492-feature_horizontal_radioresponse, BZ4492-feature_Support_horizontal_radioresponse, BZ4492-Support_horizontal_radioresponse
- Bug 6371.
  - Use of lonBalancer in Apache config file superceded by setting
    loadbalancing in domain configuration.
  - More granularity available in load balancing:
     - Rules can be defined for users in domain, based on institutional
       affiliation (e.g., Faculty, Staff, Student etc.).
     - Rules for advanced user or author trump rules based on affiliation
     - Rules can also be set for users from other domain hosted by
       institution (i.e., multi-domain server set-ups)
     - Rules can also be set for users from other institutions.

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler
    3: #
    4: # $Id: lonacc.pm,v 1.137 2011/08/09 01:35:31 raeburn Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: ###
   29: 
   30: =head1 NAME
   31: 
   32: Apache::lonacc - Cookie Based Access Handler
   33: 
   34: =head1 SYNOPSIS
   35: 
   36: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
   37: 
   38:  PerlAccessHandler       Apache::lonacc
   39: 
   40: =head1 INTRODUCTION
   41: 
   42: This module enables cookie based authentication and is used
   43: to control access for many different LON-CAPA URIs.
   44: 
   45: Whenever the client sends the cookie back to the server, 
   46: this cookie is handled by either lonacc.pm or loncacc.pm
   47: (see srm.conf for what is invoked when).  If
   48: the cookie is missing or invalid, the user is re-challenged
   49: for login information.
   50: 
   51: This is part of the LearningOnline Network with CAPA project
   52: described at http://www.lon-capa.org.
   53: 
   54: =head1 HANDLER SUBROUTINE
   55: 
   56: This routine is called by Apache and mod_perl.
   57: 
   58: =over 4
   59: 
   60: =item *
   61: 
   62: transfer profile into environment
   63: 
   64: =item *
   65: 
   66: load POST parameters
   67: 
   68: =item *
   69: 
   70: check access
   71: 
   72: =item *
   73: 
   74: if allowed, get symb, log, generate course statistics if applicable
   75: 
   76: =item *
   77: 
   78: otherwise return error
   79: 
   80: =item *
   81: 
   82: see if public resource
   83: 
   84: =item *
   85: 
   86: store attempted access
   87: 
   88: =back
   89: 
   90: =head1 NOTABLE SUBROUTINES
   91: 
   92: =over
   93: 
   94: =cut
   95: 
   96: 
   97: package Apache::lonacc;
   98: 
   99: use strict;
  100: use Apache::Constants qw(:common :http :methods);
  101: use Apache::File;
  102: use Apache::lonnet;
  103: use Apache::loncommon();
  104: use Apache::lonlocal;
  105: use Apache::restrictedaccess();
  106: use Apache::blockedaccess(); 
  107: use Fcntl qw(:flock);
  108: use LONCAPA;
  109: 
  110: sub cleanup {
  111:     my ($r)=@_;
  112:     if (! $r->is_initial_req()) { return DECLINED; }
  113:     &Apache::lonnet::save_cache();
  114:     &Apache::lontexconvert::jsMath_reset();
  115:     return OK;
  116: }
  117: 
  118: sub goodbye {
  119:     my ($r)=@_;
  120:     &Apache::lonnet::goodbye();
  121:     return DONE;
  122: }
  123: 
  124: ###############################################
  125: 
  126: sub get_posted_cgi {
  127:     my ($r,$fields) = @_;
  128: 
  129:     my $buffer;
  130:     if ($r->header_in('Content-length')) {
  131: 	$r->read($buffer,$r->header_in('Content-length'),0);
  132:     }
  133:     my $content_type = $r->header_in('Content-type');
  134:     if ($content_type !~ m{^multipart/form-data}) {
  135: 	my @pairs=split(/&/,$buffer);
  136: 	my $pair;
  137: 	foreach $pair (@pairs) {
  138: 	    my ($name,$value) = split(/=/,$pair);
  139: 	    $value =~ tr/+/ /;
  140: 	    $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  141: 	    $name  =~ tr/+/ /;
  142: 	    $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  143:             if (ref($fields) eq 'ARRAY') {
  144:                 next if (!grep(/^\Q$name\E$/,@{$fields}));
  145:             }
  146: 	    &Apache::loncommon::add_to_env("form.$name",$value);
  147: 	}
  148:     } else {
  149: 	my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
  150: 	my @lines = split (/\n/,$buffer);
  151: 	my $name='';
  152: 	my $value='';
  153: 	my $fname='';
  154: 	my $fmime='';
  155: 	my $i;
  156: 	for ($i=0;$i<=$#lines;$i++) {
  157: 	    if ($lines[$i]=~/^--\Q$contentsep\E/) {
  158: 		if ($name) {
  159: 		    $value=~s/[\r\n]+$//;
  160:                     if (ref($fields) eq 'ARRAY') {
  161:                         next if (!grep(/^\Q$name\E$/,@{$fields}));
  162:                     }
  163:                     if ($fname) {
  164:                         if ($env{'form.symb'} ne '') {
  165:                             my $size = (length($value))/(1024.0 * 1024.0);
  166:                             if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
  167:                                 $env{"form.$name.filename"}=$fname;
  168:                                 $env{"form.$name.mimetype"}=$fmime;
  169:                                 &Apache::loncommon::add_to_env("form.$name",$value);
  170:                             }
  171:                         } else {
  172:                             $env{"form.$name.filename"}=$fname;
  173:                             $env{"form.$name.mimetype"}=$fmime;
  174:                             &Apache::loncommon::add_to_env("form.$name",$value);
  175:                         }
  176:                     } else {
  177:                         $value=~s/\s+$//s;
  178:                         &Apache::loncommon::add_to_env("form.$name",$value);
  179:                     }
  180: 		}
  181: 		if ($i<$#lines) {
  182: 		    $i++;
  183: 		    $lines[$i]=~
  184: 		/Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
  185: 		    $name=$1;
  186: 		    $value='';
  187: 		    if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
  188: 			$fname=$1;
  189: 			if 
  190:                             ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
  191: 				$fmime=$1;
  192: 				$i++;
  193: 			    } else {
  194: 				$fmime='';
  195: 			    }
  196: 		    } else {
  197: 			$fname='';
  198: 			$fmime='';
  199: 		    }
  200: 		    $i++;
  201: 		}
  202: 	    } else {
  203: 		$value.=$lines[$i]."\n";
  204: 	    }
  205: 	}
  206:     }
  207: #
  208: # Digested POSTed values
  209: #
  210: # Remember the way this was originally done (GET or POST)
  211: #
  212:     $env{'request.method'}=$ENV{'REQUEST_METHOD'};
  213: #
  214: # There may also be stuff in the query string
  215: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
  216: # Also, unset POSTed content length to cover all tracks.
  217: #
  218: 
  219:     $r->method_number(M_GET);
  220: 
  221:     $r->method('GET');
  222:     $r->headers_in->unset('Content-length');
  223: }
  224: 
  225: =pod
  226: 
  227: =item upload_size_allowed()
  228: 
  229: 	Perform size checks for file uploads to essayresponse items in course context.
  230: 	
  231: 	Add form.HWFILESIZE.$part_$id to %env with file size (MB)
  232: 	If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
  233: 
  234: =cut
  235:  
  236: sub upload_size_allowed {
  237:     my ($name,$size,$fname) = @_;
  238:     if ($name =~ /^HWFILE(\w+)$/) {
  239:         my $ident = $1;
  240:         my $item = 'HWFILESIZE'.$ident;
  241:         my $savesize = sprintf("%.6f",$size);
  242:         &Apache::loncommon::add_to_env("form.$item",$savesize);
  243:         my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
  244:         if (!$maxsize) {
  245:             $maxsize = 10.0; # FIXME This should become a domain configuration.
  246:         }
  247:         if ($size > $maxsize) {
  248:             my $warn = 'HWFILETOOBIG'.$ident;
  249:             &Apache::loncommon::add_to_env("form.$warn",$fname);
  250:             return;
  251:         }
  252:     }
  253:     return 'ok';
  254: }
  255: 
  256: =pod
  257: 
  258: =item sso_login()
  259: 
  260: 	handle the case of the single sign on user, at this point $r->user 
  261: 	will be set and valid now need to find the loncapa user info and possibly
  262: 	balance them
  263: 	returns OK if it was a SSO and user was handled
  264:         undef if not SSO or no means to hanle the user
  265:         
  266: =cut
  267: 
  268: sub sso_login {
  269:     my ($r,$handle) = @_;
  270: 
  271:     my $lonidsdir=$r->dir_config('lonIDsDir');
  272:     if (!($r->user 
  273: 	  && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
  274: 	  && ($handle eq ''))) {
  275: 	# not an SSO case or already logged in
  276: 	return undef;
  277:     }
  278: 
  279:     my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
  280: 
  281:     my $query = $r->args;
  282:     my %form;
  283:     if ($query) {
  284:         my @items = ('role','symb');
  285:         &Apache::loncommon::get_unprocessed_cgi($query,\@items);
  286:         foreach my $item (@items) {
  287:             if (defined($env{'form.'.$item})) {
  288:                 $form{$item} = $env{'form.'.$item};
  289:             }
  290:         }
  291:     }
  292: 
  293:     my $domain = $r->dir_config('lonSSOUserDomain');
  294:     if ($domain eq '') {
  295:         $domain = $r->dir_config('lonDefDomain');
  296:     }
  297:     my $home=&Apache::lonnet::homeserver($user,$domain);
  298:     if ($home !~ /(con_lost|no_host|no_such_host)/) {
  299: 	&Apache::lonnet::logthis(" SSO authorized user $user ");
  300:         my ($is_balancer,$otherserver) =
  301:             &Apache::lonnet::check_loadbalancing($user,$domain);
  302: 	if ($is_balancer) {
  303: 	    # login but immediately go to switch server to find us a new 
  304: 	    # machine
  305: 	    &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
  306:             $env{'request.sso.login'} = 1;
  307:             if (defined($r->dir_config("lonSSOReloginServer"))) {
  308:                 $env{'request.sso.reloginserver'} =
  309:                     $r->dir_config('lonSSOReloginServer');
  310:             }
  311:             my $redirecturl = '/adm/switchserver';
  312:             if ($otherserver ne '') {
  313:                 $redirecturl .= '?otherserver='.$otherserver;
  314:             }
  315: 	    $r->internal_redirect($redirecturl);
  316: 	    $r->set_handlers('PerlHandler'=> undef);
  317: 	} else {
  318: 	    # need to login them in, so generate the need data that
  319: 	    # migrate expects to do login
  320: 	    my %info=('ip'        => $r->connection->remote_ip(),
  321: 		      'domain'    => $domain,
  322: 		      'username'  => $user,
  323: 		      'server'    => $r->dir_config('lonHostID'),
  324: 		      'sso.login' => 1
  325: 		      );
  326:             foreach my $item ('role','symb') {
  327:                 if (exists($form{$item})) {
  328:                     $info{$item} = $form{$item};
  329:                 }
  330:             }
  331:             if ($r->dir_config("ssodirecturl") == 1) {
  332:                 $info{'origurl'} = $r->uri;
  333:             }
  334:             if (defined($r->dir_config("lonSSOReloginServer"))) {
  335:                 $info{'sso.reloginserver'} = 
  336:                     $r->dir_config('lonSSOReloginServer'); 
  337:             }
  338: 	    my $token = 
  339: 		&Apache::lonnet::tmpput(\%info,
  340: 					$r->dir_config('lonHostID'));
  341: 	    $env{'form.token'} = $token;
  342: 	    $r->internal_redirect('/adm/migrateuser');
  343: 	    $r->set_handlers('PerlHandler'=> undef);
  344: 	}
  345: 	return OK;
  346:     } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
  347: 	&Apache::lonnet::logthis(" SSO authorized unknown user $user ");
  348:         $r->subprocess_env->set('SSOUserUnknown' => $user);
  349:         $r->subprocess_env->set('SSOUserDomain' => $domain);
  350:         my @cancreate;
  351:         my %domconfig =
  352:             &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
  353:         if (ref($domconfig{'usercreation'}) eq 'HASH') {
  354:             if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
  355:                 if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
  356:                     @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
  357:                 } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 
  358:                          ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
  359:                     @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
  360:                 }
  361:             }
  362:         }
  363:         if (grep(/^sso$/,@cancreate)) {
  364:             $r->internal_redirect('/adm/createaccount');
  365:         } else {
  366: 	    $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
  367:         }
  368: 	$r->set_handlers('PerlHandler'=> undef);
  369: 	return OK;
  370:     }
  371:     return undef;
  372: }
  373: 
  374: sub handler {
  375:     my $r = shift;
  376:     my $requrl=$r->uri;
  377:     if (&Apache::lonnet::is_domainimage($requrl)) {
  378:         return OK;
  379:     }
  380: 
  381:     if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
  382:         return OK;
  383:     }
  384: 
  385:     my $handle = &Apache::lonnet::check_for_valid_session($r);
  386: 
  387:     my $result = &sso_login($r,$handle);
  388:     if (defined($result)) {
  389: 	return $result;
  390:     }
  391: 
  392:     my ($is_balancer,$otherserver);
  393:     
  394:     if ($handle eq '') {
  395: 	$r->log_reason("Cookie $handle not valid", $r->filename); 
  396:     } elsif ($handle ne '') {
  397: 
  398: # ------------------------------------------------------ Initialize Environment
  399: 	my $lonidsdir=$r->dir_config('lonIDsDir');
  400: 	&Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
  401: 
  402: # --------------------------------------------------------- Initialize Language
  403: 
  404: 	&Apache::lonlocal::get_language_handle($r);
  405: 
  406:     }
  407: 
  408: # -------------------------------------------------- Should be a valid user now
  409:     if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
  410: # -------------------------------------------------------------- Resource State
  411: 
  412: 	if ($requrl=~/^\/+(res|uploaded)\//) {
  413: 	    $env{'request.state'} = "published";
  414: 	} else {
  415: 	    $env{'request.state'} = 'unknown';
  416: 	}
  417: 	$env{'request.filename'} = $r->filename;
  418: 	$env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
  419:         if ($requrl =~ m{^/adm/wrapper/ext/}) {
  420:             my $query = $r->args;
  421:             if ($query) {
  422:                 my $preserved;
  423:                 foreach my $pair (split(/&/,$query)) {
  424:                     my ($name, $value) = split(/=/,$pair);
  425:                     unless ($name eq 'symb') {
  426:                         $preserved .= $pair.'&';
  427:                     }
  428:                 }
  429:                 $preserved =~ s/\&$//;
  430:                 if ($preserved) {
  431:                     $env{'request.external.querystring'} = $preserved;
  432:                 }
  433:             }
  434:         }
  435: # -------------------------------------------------------- Load POST parameters
  436: 
  437: 	&Apache::lonacc::get_posted_cgi($r);
  438: 
  439: # ------------------------------------------------------ Check if load balancer 
  440: 
  441:         ($is_balancer,$otherserver) =
  442:             &Apache::lonnet::check_loadbalancing($env{'user.name'},
  443:                                                  $env{'user.domain'});
  444:         if ($is_balancer) {
  445:             $r->set_handlers('PerlResponseHandler'=>
  446:                              [\&Apache::switchserver::handler]);
  447:             if ($otherserver ne '') {
  448:                 $env{'form.otherserver'} = $otherserver;
  449:             }
  450:         }
  451: 
  452: # ---------------------------------------------------------------- Check access
  453: 	my $now = time;
  454: 	if ($requrl !~ m{^/(?:adm|public|prtspool)/}
  455: 	    || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
  456: 	    my $access=&Apache::lonnet::allowed('bre',$requrl);
  457: 	    if ($access eq '1') {
  458: 		$env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
  459: 		return HTTP_NOT_ACCEPTABLE; 
  460: 	    }
  461: 	    if ($access eq 'A') {
  462: 		&Apache::restrictedaccess::setup_handler($r);
  463: 		return OK;
  464: 	    }
  465:             if ($access eq 'B') {
  466:                 &Apache::blockedaccess::setup_handler($r);
  467:                 return OK;
  468:             }
  469: 	    if (($access ne '2') && ($access ne 'F')) {
  470:                 if ($requrl =~ m{^/res/}) {
  471:                     $access = &Apache::lonnet::allowed('bro',$requrl);
  472:                     if ($access ne 'F') {
  473:                         if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
  474:                             $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
  475:                             if ($access ne 'F') {
  476:                                 $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  477:                                 return HTTP_NOT_ACCEPTABLE;
  478:                             }
  479:                         } else {
  480:                             $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  481:                             return HTTP_NOT_ACCEPTABLE;
  482:                         }
  483:                     }
  484:                 } else {
  485: 		    $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  486: 		    return HTTP_NOT_ACCEPTABLE;
  487:                 }
  488: 	    }
  489: 	}
  490: 	if ($requrl =~ m|^/prtspool/|) {
  491: 	    my $start='/prtspool/'.$env{'user.name'}.'_'.
  492: 		$env{'user.domain'};
  493: 	    if ($requrl !~ /^\Q$start\E/) {
  494: 		$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  495: 		return HTTP_NOT_ACCEPTABLE;
  496: 	    }
  497: 	}
  498: 	if ($requrl =~ m|^/zipspool/|) {
  499: 	    my $start='/zipspool/zipout/'.$env{'user.name'}.":".
  500: 		$env{'user.domain'};
  501: 	    if ($requrl !~ /^\Q$start\E/) {
  502: 		$env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  503: 		return HTTP_NOT_ACCEPTABLE;
  504: 	    }
  505: 	}
  506: 	if ($env{'user.name'} eq 'public' && 
  507: 	    $env{'user.domain'} eq 'public' &&
  508: 	    $requrl !~ m{^/+(res|public|uploaded)/} &&
  509: 	    $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
  510:         $requrl !~ m{^/adm/blockingstatus/.*$} &&
  511: 	    $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
  512: 	    $env{'request.querystring'}=$r->args;
  513: 	    $env{'request.firsturl'}=$requrl;
  514: 	    return FORBIDDEN;
  515: 	}
  516: # ------------------------------------------------------------- This is allowed
  517: 	if ($env{'request.course.id'}) {
  518: 	    &Apache::lonnet::countacc($requrl);
  519: 	    $requrl=~/\.(\w+)$/;
  520:             my $query=$r->args;
  521: 	    if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
  522: 		($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
  523: 		($requrl=~/^\/adm\/wrapper\//) ||
  524: 		($requrl=~m|^/adm/coursedocs/showdoc/|) ||
  525: 		($requrl=~m|\.problem/smpedit$|) ||
  526: 		($requrl=~/^\/public\/.*\/syllabus$/) ||
  527:                 ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
  528:                 ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/)) {
  529: # ------------------------------------- This is serious stuff, get symb and log
  530: 		my $symb;
  531: 		if ($query) {
  532: 		    &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
  533: 		}
  534: 		if ($env{'form.symb'}) {
  535: 		    $symb=&Apache::lonnet::symbclean($env{'form.symb'});
  536: 		    if ($requrl =~ m|^/adm/wrapper/|
  537: 			|| $requrl =~ m|^/adm/coursedocs/showdoc/|) {
  538: 			my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
  539: 			&Apache::lonnet::symblist($map,$murl => [$murl,$mid],
  540: 						  'last_known' =>[$murl,$mid]);
  541: 		    } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
  542: 			     (($requrl=~m|(.*)/smpedit$|) &&
  543: 			      &Apache::lonnet::symbverify($symb,$1)) ||
  544:                              (($requrl=~m|(.*/aboutme)/portfolio$|) &&
  545:                               &Apache::lonnet::symbverify($symb,$1))) {
  546: 			my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
  547: 			&Apache::lonnet::symblist($map,$murl => [$murl,$mid],
  548: 						  'last_known' =>[$murl,$mid]);
  549: 		    } else {
  550: 			$r->log_reason('Invalid symb for '.$requrl.': '.
  551: 				       $symb);
  552: 			$env{'user.error.msg'}=
  553: 			    "$requrl:bre:1:1:Invalid Access";
  554: 			return HTTP_NOT_ACCEPTABLE; 
  555: 		    }
  556: 		} else {
  557:                     if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
  558:                         $requrl = $1;
  559:                     }
  560: 		    $symb=&Apache::lonnet::symbread($requrl);
  561: 		    if (&Apache::lonnet::is_on_map($requrl) && $symb &&
  562: 			!&Apache::lonnet::symbverify($symb,$requrl)) {
  563: 			$r->log_reason('Invalid symb for '.$requrl.': '.$symb);
  564: 			$env{'user.error.msg'}=
  565: 			    "$requrl:bre:1:1:Invalid Access";
  566: 			return HTTP_NOT_ACCEPTABLE; 
  567: 		    }
  568: 		    if ($symb) {
  569: 			my ($map,$mid,$murl)=
  570: 			    &Apache::lonnet::decode_symb($symb);
  571: 			&Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
  572: 						  'last_known' =>[$murl,$mid]);
  573: 		    }
  574: 		}
  575: 		$env{'request.symb'}=$symb;
  576: 		&Apache::lonnet::courseacclog($symb);
  577: 	    } else {
  578: # ------------------------------------------------------- This is other content
  579: 		&Apache::lonnet::courseacclog($requrl);    
  580: 	    }
  581:             my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};;
  582:             my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};;
  583:             if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/docs/.+\.html?$}) {
  584:                 if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
  585:                     if ($query) {
  586:                         &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
  587:                         if ($env{'form.forceedit'}) {
  588:                             $env{'request.state'} = 'edit';
  589:                         }
  590:                     }
  591:                 }
  592:             }
  593: 	}
  594: 	return OK;
  595:     } else {
  596:         my $defdom=$r->dir_config('lonDefDomain');
  597:         ($is_balancer,$otherserver) =
  598:             &Apache::lonnet::check_loadbalancing(undef,$defdom);
  599:         if ($is_balancer) {
  600:             $r->set_handlers('PerlResponseHandler'=>
  601:                              [\&Apache::switchserver::handler]);
  602:             if ($otherserver ne '') {
  603:                 $env{'form.otherserver'} = $otherserver;
  604:             }
  605:         }
  606:     }
  607: # -------------------------------------------- See if this is a public resource
  608:     if ($requrl=~m|^/+adm/+help/+|) {
  609:  	return OK;
  610:     }
  611: # ------------------------------------ See if this is a viewable portfolio file
  612:     if (&Apache::lonnet::is_portfolio_url($requrl)) {
  613: 	my $access=&Apache::lonnet::allowed('bre',$requrl);
  614: 	if ($access eq 'A') {
  615: 	    &Apache::restrictedaccess::setup_handler($r);
  616: 	    return OK;
  617: 	}
  618: 	if (($access ne '2') && ($access ne 'F')) {
  619: 	    $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  620: 	    return HTTP_NOT_ACCEPTABLE;
  621: 	}
  622:     }
  623: 
  624: # -------------------------------------------------------------- Not authorized
  625:     $requrl=~/\.(\w+)$/;
  626: #    if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
  627: #        ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
  628: #        ($requrl=~m|^/prtspool/|)) {
  629: # -------------------------- Store where they wanted to go and get login screen
  630: 	$env{'request.querystring'}=$r->args;
  631: 	$env{'request.firsturl'}=$requrl;
  632:        return FORBIDDEN;
  633: #   } else {
  634: # --------------------------------------------------------------------- Goodbye
  635: #       return HTTP_BAD_REQUEST;
  636: #   }
  637: }
  638: 
  639: 1;
  640: __END__
  641: 
  642: =pod
  643: 
  644: =back
  645: 
  646: =cut
  647: 

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