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Firebase SDK for Cloud Functions Quickstart - Callable Functions Streaming

This quickstart demonstrates how to send requests to a server-side function and stream a response to a client SDK using Dart.

Read more about Cloud Functions for Firebase

Frontend Client

You can find the frontend code in ../../../Node/quickstarts/callable-functions-streaming/website.

IMPORTANT NOTE: Due to limitations during the experimental release of Dart support in Cloud Functions for Firebase, the code in the website must be modified. Instead of using httpsCallable, you must use httpsCallableFromURL and pass the full function url (https://<function-name-and-hash>.run.app or the emulator equivalent), which can be found in the Cloud console or the emulator logs.

Deploy the app to prod

First you need to get the dart dependencies of the functions:

dart pub get

Deploy to Firebase using the following command:

firebase deploy --only functions

License

© Google, 2026. Licensed under an Apache-2 license.