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I am trying to connect to my Firebase functions emulators from my test Android device.

When I run the emulators the output is:

┌─────────────────────────────────────────────────────────────┐ │ ✔ All emulators ready! It is now safe to connect your app. │ │ i View Emulator UI at http://localhost:4000 │ └─────────────────────────────────────────────────────────────┘ ┌───────────┬────────────────┬─────────────────────────────────┐ │ Emulator │ Host:Port │ View in Emulator UI │ ├───────────┼────────────────┼─────────────────────────────────┤ │ Functions │ localhost:5001 │ http://localhost:4000/functions │ └───────────┴────────────────┴─────────────────────────────────┘ Emulator Hub running at localhost:4400 Other reserved ports: 4500 Issues? Report them at https://github.com/firebase/firebase-tools/issues and attach the *-debug.log files.

From my Flutter app, I do the following to connect:

FirebaseFunctions.instance.useFunctionsEmulator(origin: 'http://192.168.1.158:5001');

I have added android:usesCleartextTraffic="true" to my AndroidManifest and a network_security_config.xml as stated here and here.

I am getting all the time the following error:

PlatformException(firebase_functions, com.google.firebase.functions.FirebaseFunctionsException: INTERNAL, {code: unavailable, message: com.google.firebase.functions.FirebaseFunctionsException: INTERNAL}

What am I doing wrong?

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  • Does origin: 'http://localhost:5001' work? Commented Jun 30, 2021 at 12:28
  • No @Dharmaraj, it's a physical device. Commented Jul 1, 2021 at 8:44
  • Then can you try firebase serve --host 0.0.0.0 so the emulators are available over the network? Commented Jul 1, 2021 at 8:48

1 Answer 1

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By default, all the emulators will listen to localhost only and not your local network.

I tried replicating your issue by running my hosting emulator on the whole network and functions emulator only on localhost as in the following screenshot.

enter image description here

const firebaseConfig = {...} firebase.initializeApp(firebaseConfig); firebase.functions().useEmulator("192.168.0.102", 5001); var addMessage = firebase.functions().httpsCallable('addMessage'); addMessage({ text: "messageText" }).then((result) => { // Read result of the Cloud Function. var sanitizedMessage = result.data.text; });

I copied the sample function from the documentation and tried calling the function and as expected:

enter image description here

If you serve the functions using firebase serve --only functions --host 0.0.0.0 it should make functions available for your network.

Alternatively, you can specify that in your firebase.json like this:

{ "functions": { "predeploy": "npm --prefix \"$RESOURCE_DIR\" run build" }, "emulators": { "functions": { "port": 5001, "host": "0.0.0.0" } } }

Then you can simply start the emulators using firebase emulators:start.

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YES.. I LIKE THAT YOU MENTIONED: Then you can simply start the emulators using firebase emulators:start. I was just changing the host but not restarting the emulators!!

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