[Bug] Firebase Functions - GetHttpsCallable actually sends a POST request, should be renamed

[Vixxd]

[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021.1.17f1
• Firebase Unity SDK version: 8.8.0
• Source you installed the SDK: .unitypackage
• Problematic Firebase Component: Functions
• Other Firebase Components in use: Auth, Firestore
• Additional SDKs you are using: N/A
• Platform you are using the Unity editor on: Windows
• Platform you are targeting: Android
• Scripting Runtime: IL2CPP

[REQUIRED] Please describe the issue here:

I am using Firebase Functions with Express routing set up, e.g. in my index.ts file (external to the Unity project):

api.get("/products", helloWorld);

When I call this route within my Unity project, using GetHttpsCallable in a C# file:

var func = _firebaseFunc.GetHttpsCallable("api/products");

It turns out a POST request is sent by default (using SmartSniff)

From reading about this (StackOverflow 1, 2) it seems this is intended behaviour - Firebase cloud functions indeed only accept POST requests: https://firebase.google.com/docs/functions/callable-reference

However, it would certainly solve a lot of headaches if the SDK method call did not begin with the word 'GET'. The only error message I was able to get was 'INTERNAL' in the Unity editor, or 'Not Valid JSON' when building to device, and as a result took some time to debug.

After creating a duplicate route with 'post' alongside my 'get' route, the call began to work as expected:

api.get("/products", helloWorld);
api.post("/products", helloWorld);

Steps to reproduce:

As above

Relevant Code:

As above

[paulinon]

Hi @Vixxd,

Thanks for filing this ticket. I've taken note of this and marked this as a feature request. You may refer to this thread for any updates.

[Vixxd]

Hi @Vixxd,

Thanks for filing this ticket. I've taken note of this and marked this as a feature request. You may refer to this thread for any updates.

That's great, thank you!