# The LearningOnline Network
# Replication Manager
# (Access Handler for File Transfers
# (lonacc: Cookie Based Access Handler
# 5/21/99,5/22,5/29,5/31,6/15 Gerd Kortemeyer)
# 6/16,6/18 Gerd Kortemeyer)
# 6/18,6/21,6/26,6/28,6/29,6/30,
# 7/2,7/3,7/9,7/10,7/12 Gerd Kortemeyer

package Apache::lonrep;

use strict;
use Apache::Constants qw(:common :http);
use LWP::UserAgent();
use Apache::lonnet();
use Apache::File();

sub handler {
    my $r = shift;
    if (-e $r->finfo) {
      return OK;
    } else {
      my $filename=$r->filename.$r->path_info;
      my $transname="$filename.in.transfer";
      if (-e $transname) {
	sleep 10;
        $r->filename($filename);
        if (-e $r->finfo) {
	   return OK;
        } else {
	   $r->log_reason("Waiting for file transfer timed out",$filename);
	   return HTTP_SERVICE_UNAVAILABLE;
        }
      } else {
        my $remoteurl=Apache::lonnet::subscribe($filename);
        if ($remoteurl eq 'con_lost') {
	   $r->log_reason("Subscribe returned con_lost",$filename);
           return HTTP_SERVICE_UNAVAILABLE;
	} elsif ($remoteurl eq 'not_found') {
	   $r->log_reason("Subscribe returned not_found",$filename);
	   return HTTP_NOT_FOUND;
        } elsif ($remoteurl eq 'forbidden') {
	   $r->log_reason("Subscribe returned forbidden",$filename);
           return FORBIDDEN;
        } else {
           my @parts=split(/\//,$filename);
           my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
           my $count;
           for ($count=5;$count<$#parts;$count++) {
               $path.="/$parts[$count]";
               if ((-e $path)!=1) {
		   mkdir($path,0777);
               }
           }
           my $ua=new LWP::UserAgent;
           my $request=new HTTP::Request('GET',"$remoteurl");
           my $response=$ua->request($request,$transname);
           if ($response->is_error()) {
	       unlink($transname);
               my $message=$response->status_line;
               $r->log_reason("LWP GET: $message",$filename);
               return HTTP_SERVICE_UNAVAILABLE;
           } else {
               rename($transname,$filename);
               $r->filename($filename);
               return OK;
           }
        }
      }
   }
}

1;
__END__