app.py

from fastapi import FastAPI, HTTPException, Request
from transformers import pipeline
import os

app = FastAPI()

# Load your model
classifier = pipeline('sentiment-analysis')

# Define your API key (in a real application, use environment variables or a secret manager)
API_KEY = os.getenv("API_KEY", "your-default-api-key")

@app.middleware("http")
async def api_key_middleware(request: Request, call_next):
    api_key = request.headers.get("X-API-KEY")
    if api_key != API_KEY:
        raise HTTPException(status_code=403, detail="Could not validate API key")
    response = await call_next(request)
    return response

@app.post("/predict")
async def predict(text: str):
    result = classifier(text)
    return result

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000)