title: Django: caching images
body: <p>I am currently using <a href="https://github.com/django-compressor/django-compressor" rel="nofollow">django-compressor</a> which provides great benefits by caching compressed CSS and JS files.</p>
  
  <p>Now I would like to cache images. I know that browser caching can be enabled using HTTP headers (downstream caching) but I would like to use Redis here (it is already used by django-compressor).</p>
  
  <p>So this is my first question: is it right to cache images with Redis?</p>
  
  <p>I have read interesting things about <a href="https://github.com/mariocesar/sorl-thumbnail" rel="nofollow">sorl-thumbnail</a> and its caching through the thumbnail template tag. I thought maybe I could use it in a raw way but the tag requires a geometry argument.</p>
  
  <p>Is there an existing Django package I could use to cache images? Should I write a template tag similar to sorl-thumbnail's thumbnail tag to enable image caching by using <a href="https://docs.djangoproject.com/en/1.9/topics/cache/#accessing-the-cache" rel="nofollow">Django's built-in cache</a>?</p>