title: Scrapy ImagesPipeline not downloading images
body: <p>I'm running a Scrapy spider in python to scrape images from a website. After trying some other methods, I'm attempting to implement an ImagesPipeline for doing this. </p>
  
  <p><strong>items.py</strong></p>
  
  <pre><code>class NHTSAItem(scrapy.Item):
      image_urls = scrapy.Field()
      images = scrapy.Field()
  </code></pre>
  
  <p><strong>settings.py:</strong>  </p>
  
  <pre><code>ITEM_PIPELINES = {'scrapy.pipelines.images.ImagesPipeline': 1}
  IMAGES_STORE = 'C:\Users\me\Desktop'
  </code></pre>
  
  <p><strong>myspider.py</strong></p>
  
  <pre><code>def parse_photo_page(self, response):
      item = NHTSAItem()
      for sel in response.xpath('//table[@id="tblData"]/tr'):
          url = sel.xpath('td/font/a/@href').extract()
          table_fields = sel.xpath('td/font/text()').extract()
          if url:
              base_url_photo = "http://www-nrd.nhtsa.dot.gov"
              full_url = base_url_photo + url[0]
              if not item:
                  item['image_urls'] = [full_url]
              else: 
                  item['image_urls'].append(full_url)
      return item
  </code></pre>
  
  <p>There are no errors that come up, the images just don't get downloaded. The debugger even says "Scraped" Here's the log: </p>
  
  <pre><code>DEBUG: Scraped from &lt;200 http://www-nrd.nhtsa.dot.gov/database/VSR/veh/../SearchMedia.aspx?database=v&amp;tstno=4000&amp;mediatype=p&amp;p_tstno=4000&gt;
  {'image_urls': [u'http://www-nrd.nhtsa.dot.gov/database/MEDIA/GetMedia.aspx?tstno=4000&amp;index=1&amp;database=V&amp;type=P',
              u'http://www-nrd.nhtsa.dot.gov/database/MEDIA/GetMedia.aspx?tstno=4000&amp;index=2&amp;database=V&amp;type=P',
              u'http://www-nrd.nhtsa.dot.gov/database/MEDIA/GetMedia.aspx?tstno=4000&amp;index=3&amp;database=V&amp;type=P',
              u'http://www-nrd.nhtsa.dot.gov/database/MEDIA/GetMedia.aspx?tstno=4000&amp;index=4&amp;database=V&amp;type=P',
              u'http://www-nrd.nhtsa.dot.gov/database/MEDIA/GetMedia.aspx?tstno=4000&amp;index=5&amp;database=V&amp;type=P']}
  </code></pre>
  
  <p>I don't care about extending the pipeline (making a custom pipeline), the default imagespipeline is fine. The images are nowhere to be found. Any ideas what I'm doing wrong? </p>