By cloud functions and using typescript how can I send data to an external api and also receive json
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I'm looking into porting a unity game with a dotnet backend over to firebase firestore / functions, etc. My initial tests look promising, but my biggest hold-up is that I would need to rewrite a lot of the server-side logic in JavaScript.
I know that firebase's functions and firestore both run on google cloud, and the cloud version of functions supports a number of additional languages, including c#. I was able to create a couple of C# test functions and upload them to the same project as my unity test. They show up in the firebase portal and can be called via the HTTP endpoints supplied by google cloud, etc.
I discovered that I can call the function that does not require auth using the FirebaseFunctions callabale API in unity (fun fact, it only seems to work if the response is a JSON object in the form of { "result": [data here] }) I cannot, however, call the version of the same function that does require authentication - it returns an internal error message.
I am wondering there is a way to make these methods callable from the unity firebase API - passing in the user id/auth that I get from logging into firebase? I've seen some examples/answers where people say to call the cloud function directly using the Authorization: bearer token header, but I cannot seem to find a way to get the auth token from the current user in the Unity Firebase API.
I imagine that I am stepping further outside the realm of firebase unity API and more into google cloud/identity platform
You can retrieve the ID token of the current user by calling TokenAsync() on their profile.
That's the value you need to pass along in the Authorization header of the call to Cloud Functions, where you can then access it in you Callable Cloud Function.
Alternatively you can implement a regular HTTP Cloud Function, pass the same in whatever way you see fit there, and then on the server decode and verify the ID token with the Admin SDK yourself.
Can I call a Google cloud function from Firebase hosting?? I have a Google cloud function with memory store and I have others APIs in cloud run. These APIs in cloud run are to be called from Firebase hosting because I want to have the same base URL client. Is it possible to call from Firebase hosting the Google cloud function written in python ?
I know how to send messages from Firebase cloud messaging portal to an android device. But my server runs on Google Cloud, I do gcloud app deploy from my local machine and the app logic gets deployed on Google Cloud. Now, I want to send notifications, based on the data stored as Entities in GCP Datastore, to an Android App.
Notification messages can be sent from Firestore-Cloud Messaging portal to an Android device, if I could harness this Firestore Cloud Messaging API in my GCP logic, then my problem will be solved.
I'm trying to look for any examples or POC's.
you can use Cloud Functions to add such custom functionality...
for example: https://android.jlelse.eu/serverless-notifications-with-cloud-functions-for-firebase-685d7c327cd4
and there are Cloud Datastore Callbacks, which can be used as event triggers. most relevant for Cloud Functions might be the Google Cloud Datastore Node.js Client - in order to connect to the Datastore. here's one of my examples, it is written in AppScript (similar to Node.js), which also connects to a Cloud Datastore, with the service account JSON loaded from Google Drive.
however, in this case the Datastore would need to subsequently trigger an HTTP Trigger or Pub/Sub Trigger and the code behind that trigger could get more data from the Datastore or directly send the Firebase notification.
in Cloud Function there are just triggers for Cloud Storage, while the Pub/Sub (publish/subscribe) triggers can be used for just anything. The Datastore would need to publish whatever event (add/edit/update/delete) - while a Cloud Functions script would need to subscribe these events.
using Firebase as backend might be less effort, because data-change events/triggers are being supported out-of-the-box, without any HTTP interaction or Pub/Sub communication involved.
I am trying to establish service-service authentication between Cloud Functions and Cloud Endpoints.
I am trying to send a HTTP request inside a Firebase Cloud Function to my API running on Google App Engine and managed by Google Cloud Endpoints.
As stated in google docs, the service account that Firebase Cloud Functions uses is ____#cloudservices.gserviceaccount.com
I added that issuer in the security definition of my openAPI config(cloud endpoints). However, I could not find a way to create an access token in Cloud Functions of that service account.
How can I generate an access token in Cloud Functions to authenticate itself to Cloud Endpoints? How am I supposed to sign the JWT on cloud functions to request an access token?
Use Application Default Credentials.
Is it possible for firebase function to receive http request with multipart/form-data content-type?
Yes but Google Cloud Functions doesn't have the middleware for handling those requests built in by default (see the body-parser docs for more info).
I haven't tested it but formidable looks popular.
If you are uploading files however, I'd recommend you write them directly to Cloud Storage for Firebase instead. With Cloud Storage you'll get niceties afforded by our SDKs, you'll save bandwidth/time (since you'll be uploading it directly to the storage engine), and you get the benefit of our built-in rules engine. From there you could have a functions.storage.object().onChange(event => {}) listener in Cloud Functions which would trip whenever a new file was successfully uploaded.