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[Feature Request] Raise MSAL specific error, instead of base error `ValueError`, `RuntimeError`

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Évaluation

Difficulté
4/5
Temps estimé
3-5 jours
Accessibilité débutants
25/100
Type d'issue
Fonctionnalité
Clarté
Plutôt claire
Activité
À l'abandon
Stack technique
python
Domaine
authentication

Piste de recherche

Start by reading the linked discussion from pull request #443 and the Azure CLI error handling examples in the linked files. The issue proposes MSAL-specific exception types derived from base Python errors, such as AuthorityError or MsalValueError, but leaves the API and set of errors to define. Done means MSAL raises identifiable errors for these scenarios so callers can handle them centrally; the thread has had no comment for over three years.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

internal

Originally from https://github.com/AzureAD/microsoft-authentication-library-for-python/pull/443#discussion_r895288236

Currently, MSAL raises Python's base error ValueError for scenarios such as tenant validation failure. Azure CLI can't really tell whether the error comes from MSAL or other places if we use a centralized error handling logic.

Now we handle all PersistenceError (https://github.com/AzureAD/microsoft-authentication-extensions-for-python/pull/108) in a centralized place:

https://github.com/Azure/azure-cli/blob/3dbcafbd273a5fefce793ba1e520dc61d8c468a8/src/azure-cli-core/azure/cli/core/util.py#L140-L151

    elif isinstance(ex, PersistenceError):
        # errno is already in strerror. str(ex) gives duplicated errno.
        az_error = azclierror.CLIInternalError(ex.strerror)
        if ex.errno == 0:
            az_error.set_recommendation(
                "Please report to us via Github: https://github.com/Azure/azure-cli/issues/20278")
        elif ex.errno == -2146893813:
            az_error.set_recommendation(
                "Please report to us via Github: https://github.com/Azure/azure-cli/issues/20231")
        elif ex.errno == -2146892987:
            az_error.set_recommendation(
                "Please report to us via Github: https://github.com/Azure/azure-cli/issues/21010")

This saves us from the necessity of capturing the error and handing it in all "joints" with MSAL.

But for this ValueError, we will have to capture it everywhere when MSAL interaction is made:

https://github.com/Azure/azure-cli/blob/1d973cceb38980181eeaa45934497d2148a3e7b2/src/azure-cli-core/azure/cli/core/auth/identity.py#L141-L143

        result = self._msal_app.acquire_token_interactive(
            scopes, prompt='select_account', port=8400 if self._is_adfs else None,
            success_template=success_template, error_template=error_template, **kwargs)

https://github.com/Azure/azure-cli/blob/1d973cceb38980181eeaa45934497d2148a3e7b2/src/azure-cli-core/azure/cli/core/auth/identity.py#L152

        result = self._msal_app.acquire_token_by_device_flow(flow, **kwargs)  # By default it will block

If we don't handle the error, the raw exception with traceback is shown, like in https://github.com/Azure/azure-cli/issues/20507, which is of course bad user experience.

I am thinking maybe MSAL can do the same for this ValueError (and other base error types raised) and create new error types which inherent from ValueError, such as AuthorityError, MsalValueError.

Langage dominant
Python
Étoiles
971
Forks
223
Merge moyen
13 h 48 min
PR mergées (30 j)
2

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