Django rest framework : How to serve binary directly in the body - django

Question

I need to return an Image (binary) directly in the body request, but what i get in response is a file generated with no extension and an empty array/json inside!
I'm using python 3, Django==1.10.5 and djangorestframework==3.5.3, drf-extensions==0.3.1 (for the nested routes) and django-extra-fields==0.9 for the ImageField.
(I have tried without django-extra-fields, it's the same)
I have already found one solution (thx a lot Enix ;p) with the base64 here :Django rest framework : How to download image with this image send directly in the body
But my boss doesn't want base64 and just want the binary inside the body response.
My models.py
class Image(models.Model):
class Meta:
verbose_name = _('Image')
verbose_name_plural = _('Images')
creation_date = models.DateTimeField(
help_text=_('Creation date'),
auto_now_add=True,
editable=False
)
modified_date = models.DateTimeField(
help_text=_('Last modification date'),
auto_now=True
)
image_file = models.ImageField(upload_to='', null=True)
My serializers.py
class ImageSerializer(serializers.ModelSerializer):
class Meta:
model = Image
fields = ('image_file',)
My views.py
class ImageViewSet(NestedViewSetMixin, viewsets.ModelViewSet):
http_method_names = ['get', 'put']
queryset = Image.objects.all()
serializer_class = ImageSerializer
pagination_class = None
def get_queryset(self, *args, **kwargs):
image = Image.objects.last() # This is just for the exemple.
filename = image.image_file
size = filename.size
response = FileResponse(open(filename.path, 'rb'), content_type="image/png")
response['Content-Length'] = size
response['Content-Disposition'] = "attachment; filename=%s" % 'notification-icon.png'
return response
I have made some test with :
django.core.files.File, filewrapper, deactivate the serializer
but have not yield desired results...
If someone find out what I'm doing wrong or maybe forgot something in the settings ? Any help regarding the same would be much appreciated!

Answer 1

Ok, I found my mistake...
I was trying to override get_queryset... and not the get method which doesn't work too because I need to override the list method!
I need to sleep a little bit more ;p
Here is a solution that work's great for me with Streaming for download large file if needed :
My models.py
class Image(models.Model):
class Meta:
verbose_name = _('Image')
verbose_name_plural = _('Images')
creation_date = models.DateTimeField(
help_text=_('Creation date'),
auto_now_add=True,
editable=False
)
modified_date = models.DateTimeField(
help_text=_('Last modification date'),
auto_now=True
)
image_file = models.ImageField(upload_to='', null=True)
My serializers.py
class ImageSerializer(serializers.ModelSerializer):
class Meta:
model = Image
fields = ('image_file',)
My views.py
class ImageViewSet(NestedViewSetMixin, viewsets.ModelViewSet):
http_method_names = ['get', 'put']
queryset = Image.objects.all()
serializer_class = ImageSerializer
pagination_class = None
def list(self, request, *args, **kwargs):
image = Image.objects.get(pk=get_your_good_record)
filename = image.image_file
size = filename.size
content_type_file = mimetypes.guess_type(filename.path)[0]
response = StreamingHttpResponse(open(image.image_file.path, 'rb'), content_type=content_type_file)
response['Content-Disposition'] = "attachment; filename=%s" % str(filename)
response['Content-Length'] = size
return response
So easy ;p