Custom Decorators

from functools import wraps
from flask import Flask, request, jsonify, g

app = Flask(__name__)

def require_api_key(view):
    @wraps(view)
    def wrapped(*args, **kwargs):
        key = request.headers.get("X-API-Key")
        if key != "secret":
            return jsonify({"error": "unauthorized"}), 401
        g.api_key = key
        return view(*args, **kwargs)
    return wrapped

def log_call(view):
    @wraps(view)
    def wrapped(*args, **kwargs):
        app.logger.info(f"{request.method} {request.path}")
        return view(*args, **kwargs)
    return wrapped

@app.route("/secure")
@require_api_key
@log_call
def secure():
    return jsonify({"ok": True, "key": g.api_key})