如何检查rails上传的文件类型？

Question

我怎样才能看到提交的文件类型？例如,csv或xls ...请提供代码...我得到文件:

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)

也许是通过MIMO,但如何？

Answer 1

uploaded_io.content_type 包含文件的MIME类型.

所以:

uploaded_io.content_type == "text/csv"