Ruby scraper. How to export to CSV?

I wrote this ruby script to scrape product info from the manufacturer website. The scraping and storage of the product objects in an array works, but I can't figure out how to export the array data to a csv file. This error is being thrown:
scraper.rb:45: undefined method `send_data' for main:Object (NoMethodError)

I do not understand this piece of code. What's this doing and why isn't it working right?

  send_data csv_data, 
             :type => 'text/csv; charset=iso-8859-1; header=present', 
             :disposition => "attachment; filename=products.csv" 
 

Full code:

#!/usr/bin/ruby
 
 require 'rubygems'
 require 'anemone'
 require 'fastercsv'
 
 productsArray = Array.new
 
 class Product
     attr_accessor :name, :sku, :desc
 end
 
 # Scraper Code
 
 Anemone.crawl("http://retail.pelicanbayltd.com/") do |anemone|
     anemone.on_every_page do |page|
 
         currentPage = Product.new
 
         #Product info parsing
         currentPage.name = page.doc.css(".page_headers").text
         currentPage.sku = page.doc.css("tr:nth-child(2) strong").text
         currentPage.desc = page.doc.css("tr:nth-child(4) .item").text
 
         if currentPage.sku =~ /#\d\d\d\d/
             currentPage.sku = currentPage.sku[1..-1]
             productsArray.push(currentPage)
         end
     end
 end
 
 # CSV Export Code
 
 products = productsArray.find(:all) 
 csv_data = FasterCSV.generate do |csv| 
     # header row 
     csv << ["sku", "name", "desc"] 
 
     # data rows 
     productsArray.each do |product| 
       csv << [product.sku, product.name, product.desc] 
     end 
   end 
 
   send_data csv_data, 
             :type => 'text/csv; charset=iso-8859-1; header=present', 
             :disposition => "attachment; filename=products.csv" 
 

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