Uploading a raw file to Rails using Carrierwave

Question

My clients are trying to upload an image from Blackberry and Android phones. They don\'t like posting a)form parameters or b) multipart messages. What they would like to d

Answer 1

This can be done but you will still need your clients to send the orignal filename (and the content-type if you do any validation on the type).

def photo
  tempfile = Tempfile.new("photoupload")
  tempfile.binmode
  tempfile << request.body.read
  tempfile.rewind

  photo_params = params.slice(:filename, :type, :head).merge(:tempfile => tempfile)
  photo = ActionDispatch::Http::UploadedFile.new(photo_params)

  @postcard = Postcard.find(params[:id])
  @postcard.photo = photo

  respond_to do |format|
    if @postcard.save
      format.json { head :ok }
    else
      format.json { render :json => @postcard.errors, :status => :unprocessable_entity }
    end
  end
end

And now you can set the photo using

curl http://server/postcards/1/photo.json?filename=foo.png --data-binary @foo.png

And to specify the content-type use &type=image/png.