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- attempt to work around an error that was seen

    1: # The LearningOnline Network
    2: # Replication Manager
    3: #
    4: # $Id: lonrep.pm,v 1.13 2007/04/26 01:18:47 albertel 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: package Apache::lonrep;
   30: 
   31: use strict;
   32: use Apache::Constants qw(:common :http);
   33: use Apache::lonnet;
   34: use Apache::File();
   35: use CGI::Cookie();
   36: 
   37: sub update_filename {
   38:     my ($r,$filename) = @_;
   39:     my $oldfile = $r->filename($filename);
   40:     if ($ENV{'MOD_PERL_API_VERSION'} == 2
   41: 	&& -e $filename) {
   42: 	eval {
   43: 	    require APR::Finfo;
   44: 	    require APR::Const;
   45: 	    $r->finfo(APR::Finfo::stat($filename, 
   46: 				       &APR::Const::FINFO_NORM(),
   47: 				       $r->pool));
   48: 	};
   49: 	if ($@) {
   50: 	    return $@;
   51: 	}
   52:     }
   53:     return;
   54: }
   55: 
   56: sub handler {
   57:     my $r = shift;
   58:     if (-e $r->finfo) {
   59:       return OK;
   60:     } else {
   61:       my $filename=$r->filename.$r->path_info;
   62:       if ($filename=~/\/$/) { return OK; }
   63:       if (-e "$filename.in.transfer") {
   64: 	sleep 10;
   65:         if (-e $filename) {
   66: 	    my $error = &update_filename($r,$filename);
   67: 	    if ($error) {
   68: 		$r->log_reason('Update filename failed '.$error);
   69: 		return HTTP_SERVICE_UNAVAILABLE;
   70: 	    }
   71: 	    return OK;
   72:         } else {
   73: 	    $r->log_reason("Waiting for file transfer timed out",$filename);
   74: 	    return HTTP_SERVICE_UNAVAILABLE;
   75:         }
   76:       } else {
   77:           my $response=&Apache::lonnet::repcopy($filename);
   78:           if ($response eq 'ok' && -e $filename) {
   79: 	      $r->path_info('');
   80: 	      my $error = &update_filename($r,$filename);
   81: 	      if ($error) {
   82: 		  $r->log_reason('Update filename failed after replication '.$error);
   83: 		  return HTTP_SERVICE_UNAVAILABLE;
   84: 	      }
   85:               return OK;
   86:           }
   87:           my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
   88:           my $lonid=$cookies{'lonID'};
   89:           if ($lonid) {
   90: 	     $r->log_reason('Replication failed for '.$lonid->value);
   91:              return $response;
   92: 	  } else {
   93: 	     $r->log_reason('Replication failed for unknown user'); 
   94:              return FORBIDDEN;
   95:           } 
   96:       }
   97:     }
   98: }
   99: 
  100: 1;
  101: __END__
  102: 
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