paperless-ngx/src/paperless/middleware.py

from django.conf import settings

from paperless import version


class ApiVersionMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)
        if request.user.is_authenticated:
            versions = settings.REST_FRAMEWORK["ALLOWED_VERSIONS"]
            response["X-Api-Version"] = versions[len(versions) - 1]
            response["X-Version"] = version.__full_version_str__

        return response