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Add copyright to request environment (toward bug 488)

    1: # The LearningOnline Network
    2: # Cookie Based Access Handler
    3: #
    4: # $Id: lonacc.pm,v 1.32 2002/06/15 19:20:14 www 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: # YEAR=1999
   29: # 5/21/99,5/22,5/29,5/31,6/15,16/11,22/11,
   30: # YEAR=2000
   31: # 01/06,01/13,05/31,06/01,09/06,09/25,09/28,10/30,11/6,
   32: # 12/25,12/26,
   33: # YEAR=2001
   34: # 01/06/01,05/28,8/11,9/26,11/29 Gerd Kortemeyer
   35: # 12/15 Scott Harrison
   36: # YEAR=2002
   37: # 1/4,2/25 Gerd Kortemeyer
   38: #
   39: ###
   40: 
   41: package Apache::lonacc;
   42: 
   43: use strict;
   44: use Apache::Constants qw(:common :http :methods);
   45: use Apache::File;
   46: use Apache::lonnet;
   47: use Apache::loncommon();
   48: use CGI::Cookie();
   49: use Fcntl qw(:flock);
   50: 
   51: sub handler {
   52:     my $r = shift;
   53:     my $requrl=$r->uri;
   54:     my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   55:     my $lonid=$cookies{'lonID'};
   56:     my $cookie;
   57:     if ($lonid) {
   58: 	my $handle=$lonid->value;
   59:         $handle=~s/\W//g;
   60:         my $lonidsdir=$r->dir_config('lonIDsDir');
   61:         if ((-e "$lonidsdir/$handle.id") && ($handle ne '')) {
   62: 
   63: # ------------------------------------------- Transfer profile into environment
   64: 
   65:             my @profile;
   66: 	    {
   67:              my $idf=Apache::File->new("$lonidsdir/$handle.id");
   68:              flock($idf,LOCK_SH);
   69:              @profile=<$idf>;
   70:              $idf->close();
   71: 	    }
   72:             my $envi;
   73:             for ($envi=0;$envi<=$#profile;$envi++) {
   74: 		chomp($profile[$envi]);
   75: 		my ($envname,$envvalue)=split(/=/,$profile[$envi]);
   76:                 $ENV{$envname} = $envvalue;
   77:             }
   78:             $ENV{'user.environment'} = "$lonidsdir/$handle.id";
   79:             if ($requrl=~/^\/res\//) {
   80:                $ENV{'request.state'} = "published";
   81: 	    } else {
   82: 	       $ENV{'request.state'} = 'unknown';
   83:             }
   84:             $ENV{'request.filename'} = $r->filename;
   85: 
   86:             $ENV{'request.copyright'} = 
   87: 		&Apache::lonnet::metadata($requrl,'copyright');
   88: 
   89: # -------------------------------------------------------- Load POST parameters
   90: 
   91: 
   92:            
   93:         my $buffer;
   94: 
   95:         $r->read($buffer,$r->header_in('Content-length'));
   96: 
   97: 	unless ($buffer=~/^(\-+\w+)\s+Content\-Disposition\:\s*form\-data/si) {
   98:             my @pairs=split(/&/,$buffer);
   99:             my $pair;
  100:             foreach $pair (@pairs) {
  101:                my ($name,$value) = split(/=/,$pair);
  102:                $value =~ tr/+/ /;
  103:                $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  104:                $name  =~ tr/+/ /;
  105:                $name  =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
  106: 	       &Apache::loncommon::add_to_env("form.$name",$value);
  107:             }
  108:         } else {
  109: 	    my $contentsep=$1;
  110:             my @lines = split (/\n/,$buffer);
  111:             my $name='';
  112:             my $value='';
  113:             my $fname='';
  114:             my $fmime='';
  115:             my $i;
  116:             for ($i=0;$i<=$#lines;$i++) {
  117: 		if ($lines[$i]=~/^$contentsep/) {
  118: 		    if ($name) {
  119:                         chomp($value);
  120: 			if ($fname) {
  121: 			    $ENV{"form.$name.filename"}=$fname;
  122:                             $ENV{"form.$name.mimetype"}=$fmime;
  123:                         } else {
  124:                             $value=~s/\s+$//s;
  125:                         }
  126: 			&Apache::loncommon::add_to_env("form.$name",$value);
  127:                     }
  128:                     if ($i<$#lines) {
  129: 			$i++;
  130:                         $lines[$i]=~
  131: 		 /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
  132:                         $name=$1;
  133:                         $value='';
  134:                         if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
  135: 			   $fname=$1;
  136:                            if 
  137:                             ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
  138: 			      $fmime=$1;
  139:                               $i++;
  140: 			   } else {
  141:                               $fmime='';
  142:                            }
  143:                         } else {
  144: 			    $fname='';
  145:                             $fmime='';
  146:                         }
  147:                         $i++;
  148:                     }
  149:                 } else {
  150: 		    $value.=$lines[$i]."\n";
  151:                 }
  152:             }
  153: 	}
  154: 	    $ENV{'request.method'}=$ENV{'REQUEST_METHOD'};
  155:             $r->method_number(M_GET);
  156: 	    $r->method('GET');
  157:             $r->headers_in->unset('Content-length');
  158: 
  159: # ---------------------------------------------------------------- Check access
  160: 
  161:             if ($requrl!~/^\/adm\//) {
  162: 		my $access=&Apache::lonnet::allowed('bre',$requrl);
  163:                 if ($access eq '1') {
  164: 		   $ENV{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
  165: 	           return HTTP_NOT_ACCEPTABLE; 
  166:                 }
  167:                 if (($access ne '2') && ($access ne 'F')) {
  168: 		   $ENV{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
  169: 	           return HTTP_NOT_ACCEPTABLE; 
  170:                 }
  171:             }
  172: # ------------------------------------------------------------- This is allowed
  173:           if ($ENV{'request.course.id'}) {
  174: 	    &Apache::lonnet::countacc($requrl);
  175:             $requrl=~/\.(\w+)$/;
  176:             if (&Apache::loncommon::fileembstyle($1) eq 'ssi') {
  177: # ------------------------------------- This is serious stuff, get symb and log
  178: 		my $query=$r->args;
  179:                 my $symb;
  180:                 if ($query) {
  181: 		    &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
  182:                 }
  183:                 if ($ENV{'form.symb'}) {
  184: 		    $symb=&Apache::lonnet::symbclean($ENV{'form.symb'});
  185:                     if (&Apache::lonnet::symbverify($symb,$requrl)) {
  186:                       my ($map,$mid,$murl)=split(/\_\_\_/,$symb);
  187:                       &Apache::lonnet::symblist($map,$murl => $mid,
  188:                                                'last_known' => $murl);
  189: 		    } else {
  190: 			$r->log_reason('Invalid symb for '.$requrl.': '.
  191:                                        $symb);
  192: 		        $ENV{'user.error.msg'}=
  193:                                 "$requrl:bre:1:1:Invalid Access";
  194:   	                return HTTP_NOT_ACCEPTABLE; 
  195:                     }
  196:                 } else {
  197: 	            $symb=&Apache::lonnet::symbread;
  198:                 }
  199:                 $ENV{'request.symb'}=$symb;
  200:                 &Apache::lonnet::courseacclog($symb);
  201:             } else {
  202: # ------------------------------------------------------- This is other content
  203:                 &Apache::lonnet::courseacclog($requrl);    
  204:             }
  205: 	  }
  206:             return OK; 
  207:         } else { 
  208:             $r->log_reason("Cookie $handle not valid", $r->filename) 
  209:         };
  210:     }
  211: 
  212: # -------------------------------------------- See if this is a public resource
  213:     if (&Apache::lonnet::metadata($requrl,'copyright') eq 'public') {
  214:         &Apache::lonnet::logthis('Granting public access: '.$requrl);
  215: 	$ENV{'user.name'}='public';
  216:         $ENV{'user.domain'}='public';
  217:         $ENV{'request.state'} = "published";
  218:         $ENV{'request.publicaccess'} = 1;
  219:         $ENV{'request.filename'} = $r->filename;
  220:         return OK;
  221:     }
  222: # ----------------------------------------------- Store where they wanted to go
  223:     
  224:     $ENV{'request.firsturl'}=$requrl;
  225:     return FORBIDDEN;
  226: }
  227: 
  228: 1;
  229: __END__
  230: 
  231: =head1 NAME
  232: 
  233: Apache::lonacc - Cookie Based Access Handler
  234: 
  235: =head1 SYNOPSIS
  236: 
  237: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
  238: 
  239:  PerlAccessHandler       Apache::lonacc
  240: 
  241: =head1 INTRODUCTION
  242: 
  243: This module enables cookie based authentication and is used
  244: to control access for many different LON-CAPA URIs.
  245: 
  246: Whenever the client sends the cookie back to the server, 
  247: this cookie is handled by either lonacc.pm or loncacc.pm
  248: (see srm.conf for what is invoked when).  If
  249: the cookie is missing or invalid, the user is re-challenged
  250: for login information.
  251: 
  252: This is part of the LearningOnline Network with CAPA project
  253: described at http://www.lon-capa.org.
  254: 
  255: =head1 HANDLER SUBROUTINE
  256: 
  257: This routine is called by Apache and mod_perl.
  258: 
  259: =over 4
  260: 
  261: =item *
  262: 
  263: transfer profile into environment
  264: 
  265: =item *
  266: 
  267: load POST parameters
  268: 
  269: =item *
  270: 
  271: check access
  272: 
  273: =item *
  274: 
  275: if allowed, get symb, log, generate course statistics if applicable
  276: 
  277: =item *
  278: 
  279: otherwise return error
  280: 
  281: =item *
  282: 
  283: see if public resource
  284: 
  285: =item *
  286: 
  287: store attempted access
  288: 
  289: =back
  290: 
  291: =cut