Returning an image from a Django view using django-sslserver

I'm trying to return an image from a Django 1.11 view while using django-sslserver and Pillow. Here's a minimal view I made for testing.

def get_image(request):
    img = Image.open('oh_noes_cat.png', mode='r')
    response = HttpResponse(content_type='image/png')
    img.save(response, 'png')
    return response

In my template I use:

<img src={% url "get_image" %} />

In urls.py, I use:

url(r'^get_image.png', get_image, name='get_image')

The image response works fine with Django runserver but fails under both django-sslserver and runserver_plus from django-extensions. What I see in Chrome is a broken image icon and the error "ERR_CONTENT_LENGTH_MISMATCH".

When using django-sslserver I get the error:

[26/Dec/2017 18:55:39] "GET /get_image.png HTTP/1.1" 200 0
Traceback (most recent call last):
  File "/usr/lib/python3.5/wsgiref/handlers.py", line 138, in run
    self.finish_response()
  File "/usr/lib/python3.5/wsgiref/handlers.py", line 180, in finish_response
    self.write(data)
  File "/usr/lib/python3.5/wsgiref/handlers.py", line 279, in write
    self._write(data)
  File "/usr/lib/python3.5/wsgiref/handlers.py", line 453, in _write
    result = self.stdout.write(data)
  File "/usr/lib/python3.5/socket.py", line 593, in write
    return self._sock.send(b)
  File "/usr/lib/python3.5/ssl.py", line 861, in send
    return self._sslobj.write(data)
  File "/usr/lib/python3.5/ssl.py", line 586, in write
    return self._sslobj.write(data)
ssl.SSLEOFError: EOF occurred in violation of protocol (_ssl.c:1844)
[26/Dec/2017 18:55:39] "GET /get_image.png HTTP/1.1" 500 59

Does anyone know how I can make an image response work with django-sslserver or a similar solution for supporting SSL in a Django development environment? I've searched but not been able to find an example of someone having this particular problem.

Thanks

Since it's not completely clear what Image.save() does in this context, could you try doing it this way?

def get_image(request):
    image_data = open('oh_noes_cat.png', mode='r').read()
    return HttpResponse(image_data, content_type="image/png")