How can i authorization the rest api?

[quchunguang]

I using,

Client Request
|
python http server
|
access authorization <- MongoDB (check user table)
|
template system
|
bootstrap-table pages
|
crest service
|
MongoDB(operate data)

The page returned by python service with access authorization check.
And then the bootstrap-table pages are directly connecting to MongoDB via crest service.
The question is how can i do the access controller?

I googled say than using basic-auth/oauth1.0a/oauth2.0/...
But in my case, (already have authorization check with python service), what is the right way?