title: How can I check if Scrapy Image Pipeline is using a proxy to download images?
body: <p>I have built a scraper and would like to download some images using a proxy in scrapy. I don't know if it is really downloading through the proxy. Reponse Headers don't show the IP. Furthermore, if I change the IP to a random IP, it still downloads the Image. 
  How can I ensure it is using a proxy to download the images?
  Thanks</p>
  
  <p><strong>Pipelines.py</strong></p>
  
  <pre><code>import scrapy
  from scrapy.pipelines.images import ImagesPipeline
  from scrapy.exceptions import DropItem
  
  class MyImagesPipeline(ImagesPipeline):
  
      def get_media_requests(self, item, info):
          meta = {'proxy': 'http://23.323.44.22:11111/'}
          for image_url in item['image_urls']:
              yield scrapy.Request(image_url,meta=meta)
  </code></pre>
  
  <p><strong>Settings.py</strong></p>
  
  <pre><code>ITEM_PIPELINES = {'myproject.pipelines.MyImagesPipeline': 1}
  </code></pre>