How to check in rails uploaded file type?

Question

How can i see what type of file is comming? For example, csv or xls... Give code please... I get file so:

aut_name = uploaded_io.original_filename
      File.open(Rails.root.join('public', 'uploads_prices', uploaded_io.original_filename), 'wb') do |file|
        file.write(uploaded_io.read)
      end
      as_load(aut_name)

Maybe by MIMO, but how?

Daniel Evans · Accepted Answer · 2013-01-21T20:47:14.073

29

uploaded_io.content_type contains the MIME type of file.

So:

uploaded_io.content_type == "text/csv"

edited Jan 21 '13 at 20:47

answered Jan 21 '13 at 20:22

Daniel Evans

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and how to check it? like: if uploaded_io.content_type == "csv"? or what – Valdis Azamaris Jan 21 '13 at 20:32
is this correct for xls? .content_type == "application/vnd.ms-excel" – Valdis Azamaris Jan 22 '13 at 13:44

score 4 · Answer 2 · edited May 23 '17 at 11:44

4

Unfortunately, it (content_type method) is not going to work if a user changes file extension. I've tested that in rails console and the changing the file extension also changes "content_type" output.

Found this SO question quite helpful:

Determine file type in Ruby

edited May 23 '17 at 11:44

Community

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answered Dec 23 '15 at 22:13

wondersz1

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How to check in rails uploaded file type?

2 Answers2

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