Ability for clientAction to update data sent to the server action

[patrickberkeley]

In trying to follow the Backend-for-Frontend pattern (BFF), we have run into a few cases where it is not possible. We have third-party libraries that capture data from the browser to determine if the user is a human or bot (e.g., Cloudflare Turnstile). These cannot be run on the server, but we would like to pass data from their responses to the server action to complete the request.

Currently serverAction can be called from within clientAction, but it accepts no arguments and seems the request and request form data cannot be modified before the action hook receives the data.

This means we need to push all our handling into the clientAction since that's the only place that has access to the data that's returned from the third-party responses and breaks the BFF pattern.

In keeping with the BFF pattern, it would be great if there was a way to get data from the clientAction to the server action.

This issue is similar or identical to one that was previously closed for inactivity: #11285

[GabenGar]

If you have a fine-tuned BFF why not just create an API endpoint there and call it from loader?

[patrickberkeley]

The use cases I outlined in this issue ended up not requiring using the clientAction at all. Cloudflare Turnstile injects a hidden input into the DOM, and that can be consumed as normal in action. Closing.