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Azure Static Web App–Assign roles through an Azure Function

As a follow-up on the presentation I did at CloudBrew about Azure Static Web Apps I want to write a series of blog posts.

We ended last post about Azure Static Web Apps talking about authorization and you can use role based security by assigning either a built-in role or a custom role. I showed how you could use invitations to assign a custom role.

Today I want to show a second option to assign a custom role using an Azure Function.

We start by creating an Azure Function that will be responsible for assigning roles. Every time a user successfully authenticates with an identity provider, the POST method calls the specified function. The function passes a JSON object in the request body that contains the user's information from the provider.

Once we have our function, we need to configure the static web app to use this function. This can be done by setting the rolesSource value of the auth section in our staticwebapp.config.json file:

If we now authenticate inside our application and call the .auth/me endpoint afterwards, we should see the custom roles coming from the api:

More information

Custom authentication in Azure Static Web Apps | Microsoft Learn

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