Implementing Protected and Non-Protected Endpoints with Auth0 in FastAPI

FastAPI is a modern web framework for building APIs with Python. It is known for its fast performance and easy-to-use syntax. In this article, we will explore how to implement protected and non-protected endpoints using Auth0 authentication in FastAPI.

What is Auth0?

Auth0 is a popular authentication and authorization platform that allows developers to add secure login and user authentication to their applications. With Auth0, you can easily integrate social login, multi-factor authentication, and other security features into your web application.

Implementing Protected Endpoints

To implement protected endpoints in FastAPI using Auth0, you can use the Auth0 Python SDK to handle authentication and authorization. You will need to obtain an Auth0 API access token and configure your FastAPI application to validate this token for each request to a protected endpoint.

“`python
from fastapi import FastAPI, Depends
from fastapi.security import OAuth2AuthorizationCodeBearer
from auth0.v3.authentication import GetToken
from auth0.v3.management import Auth0
from auth0.v3.exceptions import Auth0Error

app = FastAPI()
auth = OAuth2AuthorizationCodeBearer()

@auth.get(“/protected_endpoint”)
def protected_endpoint(token: str = Depends(auth)):
try:
auth0 = Auth0()
userinfo = auth0.get_userinfo(token)
return {“message”: “Hello, {}”.format(userinfo[“name”])}
except Auth0Error as e:
return {“message”: “Error: {}”.format(str(e))}
“`

Implementing Non-Protected Endpoints

For non-protected endpoints in FastAPI, you can simply define the endpoint without any authentication middleware. These endpoints will be accessible to all users, whether they are authenticated or not.

“`python
@app.get(“/non_protected_endpoint”)
def non_protected_endpoint():
return {“message”: “This is a non-protected endpoint”}
“`

Conclusion

Implementing protected and non-protected endpoints with Auth0 in FastAPI is a straightforward process that can help you secure your API and provide a better user experience. By adding authentication and authorization features to your application, you can ensure that only authorized users can access sensitive information and perform actions that require authentication.