When returning a Response from django REST API that contains a binary file, you may encounter an issue:
UnicodeDecodeError: ‘utf-8’ codec can’t decode byte in position 11: invalid start byte
That’s because the renderer tries to decode it as text, despite
content-type suggesting otherwise. To achieve the desired you need to write your own renderer.
from rest_framework.renderers import BaseRenderer class BinaryRenderer(BaseRenderer): media_type = 'application/*' format = 'binary' charset = None render_style = 'binary' def render(self, data, accepted_media_type=None, renderer_context=None): return data
and then apply it to the desired API function. If you use
@api_view decorator add
@renderer_classes=((BinaryRenderer, )) .
If you use
APIView or any of the ViewSets, you can set permissions for all methods in view, by assigning them to
renderer_classes variable, or for just one, by re-implementing a
def get_rendererss(self) method  (the example shows permissions, but it’s the same principle with renderers).
Third option is when you use the
@action decorator (or
@detail_route. Then you can simply add another parameter