Mark Chavez

eat. sleep. repeat. 👾 coding, ⌨️ keyboarding, 🚴🏼 cycling.

Rails: Streaming Downloads 10/02/2024

 class Controller < ApplicationController

  def index
    respond_to do |format|
    format.csv do
    headers["X-Accel-Buffering"] = "no"
        headers["Cache-Control"] = "no-cache"
        headers["Content-Type"] = "text/csv; charset=utf-8"
        headers["Content-Disposition"] =
           %(attachment; filename="#{csv_filename}")
        headers["Last-Modified"] = Time.zone.now.ctime.to_s
        self.response_body = build_csv_enumerator
    end
    end
  end
  
  private
  
  def build_csv_enumerator
  Enumerator.new do |yielder|
    yielder << headers_to_csv
    
    Account.find_each do |account|
    yielder << account.to_csv_row
    end
  end
  end

end

This allows your users to download files more efficiently. Especially for huge files.

next >