Is it possible to run two functions (one running FastAPI - ASGI, and one running Flask - WSGI), in one Azure function App?

Question

Im trying testing if its possible to run two functions in one Azure function app one running FastAPI and the other one running Flask.

I tried to specify a different route for each function.json file but to no avail.

# FastAPI function.json
{
    "scriptFile": "__init__.py",
    "bindings": [
        {
        "authLevel": "anonymous",
        "type": "httpTrigger",
        "direction": "in",
        "name": "req",
        "methods": [
            "get",
            "post",
            "patch",
            "delete"
        ],
        "route": "/api/{*route}"
        },
        {
        "type": "http",
        "direction": "out",
        "name": "$return"
        }
    ]
}

# __init__.py
import logging
import azure.functions as func

from fastapi import FastAPI

app = FastAPI()

@app.get("/api/hello/")
async def hello():
return {'message': 'Hello World!'}

def main(req: func.HttpRequest, context: func.Context) -> func.HttpResponse:

    return func.AsgiMiddleware(app).handle(req, context)

and

# Flask function.json
{
    "scriptFile": "__init__.py",
    "bindings": [
        {
        "authLevel": "anonymous",
        "type": "httpTrigger",
        "direction": "in",
        "name": "req",
        "methods": [
            "get",
            "post",
            "patch",
            "delete"
        ],
        "route": "/flask/{*route}"
        },
        {
        "type": "http",
        "direction": "out",
        "name": "$return"
        }
    ]
}

#__init__.py
import logging
import azure.functions as func

from flask import Flask

app = Flask(__name__)

@app.route("/home/")
def home():
    return "<p>Hello, World!</p>"

def main(req: func.HttpRequest, context: func.Context) -> func.HttpResponse:
    
    return func.WsgiMiddleware(app.wsgi_app).handle(req, context)

Answer 1

If you deploy using GitHub, you can run two functions in one Azure function app.

• To do this push the required code in a GitHub repository.
• Then in the azure function go to the development center section.
• Then select source as GitHub it will ask you to login and for permissions.
• After granting them select the repository (the repository must be private) and then select branch then click save.
• Refresh the function app and you will see the triggers in the function section

refer the following documentation for further explaination