CODEWITHSUNDEEP
djangodjango-rest-frameworkuwsgidjango-request
Naggappan Ramukannan
Naggappan Ramukannan

Reputation: 2812

Append a new Http header using django request.META

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.

Upvotes: 3

Views: 7265

Answers (1)

Gasanov
Gasanov

Reputation: 3399

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'
]

Upvotes: 2

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