I think that problem is with your setup, that is why you get the same
error. Now send_data fails faster, as you are only sending a string
instead of file content: i.e: RAILS_ROOT + "public/export.csv"

BTW: this will generate CSV data directly to a string buffer instead file:

require 'stringio'
require 'csv'

def export
  StringIO.open do |io|
     CSV::Writer.generate(io) do |writer|
          writer << ['r1c1', 'r1c2']
          writer << ['r2c1', 'r2c2']
          writer << [nil, nil]
      end
      send_data io.string, :filename => "my_data.csv"
  end
end

Zsombor

On 7/25/05, Gregg Pollack <patched@...> wrote:
> Zsombor,
>
>         I have tried both send_data and send_file.  They both render the
> same error I listed.  The only difference is that send_file takes about 10
> seconds for the server to respond, where as send_data is instantaneous.
>
>         How would I use rail's CSV tools to create a buffer which I could
> then send? This is not clear.
>
>         Thanks for the response though,
>

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