victorias-fastapi-test 0.4.0

FastAPI Runtime for Azure Functions Python Worker

Azure Functions FastAPI Runtime

This package provides a runtime adapter to run FastAPI applications natively in Azure Functions Python Worker.

Overview

The FastAPI runtime enables you to deploy existing FastAPI applications to Azure Functions without modifying your FastAPI code. The runtime:

1. Discovers FastAPI routes in your application
2. Converts each route to an Azure Function with HTTP trigger
3. Handles request forwarding between Azure Functions and FastAPI
4. Preserves FastAPI's request/response handling

Usage

Basic Example

Create a function_app.py with your FastAPI app:

from fastapi import FastAPI

app = FastAPI()

@app.get("/hello")
async def hello():
    return {"message": "Hello from FastAPI on Azure Functions!"}

@app.post("/users")
async def create_user(name: str):
    return {"user": name, "status": "created"}

The runtime will automatically discover these routes and create corresponding Azure Functions.

Architecture

• Indexer: Scans FastAPI app routes and generates function metadata
• Converter: Transforms FastAPI routes into Azure Functions structure
• Handler: Routes Azure Functions invocations to FastAPI
• Request/Response Adapter: Converts between Azure Functions and ASGI formats

Requirements

• Python 3.9+
• FastAPI 0.100.0+
• Azure Functions Python Worker

Installation

pip install azure-functions-fastapi-runtime

Development Status

This is currently a prototype/alpha release for testing FastAPI integration with Azure Functions.