Append a new Http header using django request.META - django

Question

i am using django-rest framework and i am able to get and set the custom headers using the below META information,
class log_middleware:
def __init__(self, get_response):
self.get_response = get_response
# One-time configuration and initialization.
def __call__(self,request):
# set thread local values
# This will execute before every request
correlation_id = request.META['HTTP_X_REQUEST_ID'] if 'HTTP_X_REQUEST_ID' in request.META else str(uuid.uuid4())
request.META['HTTP_X_REQUEST_ID'] = correlation_id
#logger.debug("Entered service")
response = self.get_response(request)
response['HTTP_X_REQUEST_ID'] = correlation_id
#logger.debug("Processed response")
return response
Now in my views.py i am able to get this header as request.META['HTTP_X_REQUEST_ID']. and it is available in the response header
But when I try to log the http header values in uwsgi using the below config,it has '-' empty value field. Because uwsgi has only actual request headers in %var.XXX variable and response headers goes to %headers and it shows only count and the actual values.
Issue: https://github.com/unbit/uwsgi/issues/1407
So Is there any way in django to append the data in actual request header instead of response header?
[uwsgi]
master = 1
memory-report = true
module = my_service.wsgi
http = 0.0.0.0:8080
max-requests = 50
processes = 16
log-format = { "ctime": "%(ctime)", "addr": "%(addr)", "method": "%(method)", "uri": "%(uri)", "correlation_id": "%(var.HTTP_X_REQUEST_ID)" }
But the same thing works if i set the header HTTP_X_REQUEST while sending the request itself from the rest client utils.

Answer 1

If you need middleware, you can use this:
middlewares.py:
def add_header_middleware(get_response):
def middleware(request):
request.META['hello'] = 'world'
response = get_response(request)
response['world'] = 'hello'
return response
return middleware
views.py:
#api_view(['GET'])
def sample_view(request):
return Response(request.META['hello'])
settings.py:
MIDDLEWARE = [
# ...
'your_app.middlewares.add_header_middleware'
]