Understand API Gateway as single entry point and Backend for Frontend (BFF) pattern
Imagine a hotel concierge - they coordinate everything for you. That's what an API Gateway does!
Mobile app needs to call 12 different microservices - Slow, many network calls, hard to manage!
from flask import Flask, jsonify
import requests
app = Flask(__name__)
@app.route('/api/user/')
def get_user(user_id):
response = requests.get(f"http://user-service:8080/users/{user_id}")
return jsonify(response.json())
Build robust API Gateways with authentication, rate limiting, and caching.
Different clients need different data - mobile app vs web vs IoT device.
import redis
def rate_limit(max_requests=100, window=60):
redis_client = redis.Redis()
# Implementation here
pass
Enterprise-grade API Gateway with GraphQL federation and service mesh integration.
Scale: Handles billions of requests daily