I have a web tool that manages a set of java files. A feature of this tool is being able to upload java files, or update existing ones(also via an upload).

I had this script working (i thought), but now all uploaded files show up blank(0 bytes), and from this bit of code:

while ( <$upload_filehandle> ) {
    print UPLOADFILE;
}
[download]

I get the following errors in my apache log:

Use of uninitialized value in <HANDLE>
readline() on unopened filehandle

Below is the complete code that handles the upload. The script seems to get the file info, because it does open a new file of the same name in the target directory, it just shows up as 0 bytes. I am wondering why $upload_filehandle is not getting opened correctly?
Environment: win32, apache server

use CGI;
my $i = new CGI;

my $ieFileMod;
my $upload_filename = $i->param( 'JARFILE' );
my $upload_filehandle = $i->upload( 'JARFILE' );
    
# handle copying the file to server
$upload_filename =~ m/^.*(\\|\/)(.*)/; # strip the remote path and kee
+p the filename
    
# still need to do something if its IE submitted file, since above reg
+ex doesn't clean up filename for IE
if( $upload_filename =~ /\\/ ) {
    my @nameList = split( /\\/, $upload_filename );
    $ieFileMod = pop( @nameList );
}
    
my $finalName = $upload_filename;
if( $ieFileMod ) {
    $finalName = $ieFileMod;
}
    
my $localFile = "java\\$finalName";
    
# copy the jar file in binary mode to server
open UPLOADFILE, ">$localFile";
binmode UPLOADFILE;    
while ( <$upload_filehandle> ) {
    print UPLOADFILE;
}    
close UPLOADFILE;
[download]

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