Access user info in a python Azure function

Question

Hi,

Failry new to Azure. I have created a React web app service and protected it with authentication following https://learn.microsoft.com/en-us/azure/active-directory/develop/multi-service-web-app-authentication-app-service.

Using this web app, my users can call azure functions (rest api calls from React) to perform data manipulation operations (upload, edit, remove, etc.).

Q1: do I need to follow the same process to add authentication to my azure functions?

Q2: Can I access some info about the user (for ex. a user id) in my azure functions? My functions are in python, python examples would be fantastic.

Thanks in advance for any help.

JD

Answer 1

As simple as

def main(req: func.HttpRequest) -> func.HttpResponse:
    # Retrieve the claims from the request headers
    claims = req.headers.get("X-MS-CLIENT-PRINCIPAL")

and claims contains a Base64 encoded JSON representation of the available claims.

See https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-user-identities#access-user-claims-in-app-code