Hi *,
I've just found a quite curious behaviour when using standard Perl-CGI module and CGI::Session in an upload script. Maybe somebody can explain that to me? Or is it a bug somewhere?
Description: I use the uploadInfo method of the CGI module for getting the content type of an uploaded file. If I first create the CGI object and afterwards the new CGI::Session object, everything works fine as intended.
<snippet>
use CGI qw/:standard/;
use CGI::Carp qw/fatalsToBrowser/;
use CGI::Session;
# this is the place to focus on ;)
my $cgi = new CGI; # create CGI instance
# create CGI::Session instance
my $CGISession = new CGI::Session(undef, undef, {Directory=>'./_tmp__SESSIONS', UMask=>0664}) or die CGI::Session->errstr;
my $uploadedFile = $cgi->param('uploadedFile');
my $ContentType = $cgi->uploadInfo($uploadedFile)->{'Content-Type'}; # <= here it is working...
print "the determined content-type is: ".$ContentType."<br />";
</snippet>
But: When switching the instantiation lines for CGI and CGI::Session, the uploadInfo method suddenly returns an error:
...
# this breaks the uploadInfo() method (it returns undef instead of a hash reference)
my $CGISession = new CGI::Session(undef, undef, {Directory=>'./_tmp__SESSIONS', UMask=>0664}) or die CGI::Session->errstr;
my $cgi = new CGI; # create CGI instance
# create CGI::Session instance
...
> upload.pl: Can't use an undefined value as a HASH reference at ... (=> the line with uploadInfo)
Does anybody know why that happens? I had some restless hours until I found the problem (by chance!)...
While writing this down, I could imagine that maybe the import of :standard CGI methods into local namespace has something to do with it?!
Best regards so far, and have a nice weekend.
Stefan.
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