FasterCSV: Two quick, simple, painless questions...

Hi, how is everybody doing?

1) How do I make sure that the file that is being uploaded is a CSV
file, and not another kind of file?

2) Sometimes, when I'm parsing through the CSV file, it tries to read
the row after the last row, and just reads in a bunch of nils.  When I
look at the row in Excel, it is completely blank, yet FasterCSV still
tries to read it in.  How can I stop this?

Any suggestions are appreciated.

Joe
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