A common solution is to actually store the file on disk under a generated filename, while storing the original filename, as well as other metadata in a companion file (ex 66696c656e616d65 and 66696c656e616d65.metadata). 
$ perl -le " print pack q[H*] => shift " 66696c656e616d65
filename

[download]

Common schemes include using date/time (2011-08-23-03:17:44) combined with userid .... or a UUID

In reply to Re^2: Upload file through perl-cgi not working by Anonymous Monk
in thread Upload file through perl-cgi not working by becool321

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