How to implement flask restplus authorizations - flask

Question

I am trying to setup authentication in flask-restplus application. I want to add authentication to all endpoints in the application but don't want to write decorator on each route.
I am looking for apikey based authentication. The problem is, I am unable to identify how to intercept all requests and check for authentication token in the header.
Current Code:
authorization = {
'apikey': {
'type': 'apiKey',
'in': 'header',
'name': 'x-auth'
}
}
api = Api(
title='title',
version='1.0',
description="List of API's ",
validate=True,
authorizations=authorization,
security='apikey'
)
After doing the above steps, when I open swagger I can add token using the authorize button. But once the token is passed I am unable to intercept request & verify if token is correct or not.
Currently all the examples I could find, added another decorator on each route which I don't want as it leads to poor design & duplicate code.
Currently the closest example I got is :https://www.youtube.com/watch?v=xF30i_A6cRw&list=LLpaDwEA6bAAPZU5lz0ZRsuw&index=1
but it also uses decorator on each route.
So the problem statement is:
How to intercept all requests & check for correct token in there header without adding decorator on all routes

Answer 1

Very recently, I ran into a similar problem. But luckily we do have the Namespace that accepts a list of decorators, where in you can pass the custom decorator at Resource level, and it will be implemented by default to each method of that resource.
api = Namespace(
'some Name here',
description='some description',
security='apiKey',
authorizations = authorizations,
decorators= [token_required]
)
One point to note however, I had to just specify the security with each doc in the method, as under:
#api.doc('some operation', security = 'apiKey')
The beauty with this is that one click authorization flows to each method in the resource.