Simple cache middleware for Bottle

bottle_cache.py

from bottle import route, run, response, request
import datetime
import json
import requests

# Cache middleware
def cache(callback, ttl=datetime.timedelta(hours=1)):
    cache = {}
    def wrapper(*args, **kwargs):
        key = request.path
        now = datetime.datetime.now()
        if key not in cache or now - cache[key][0] > ttl:
            value = callback(*args, **kwargs)
            cache[key] = (now, value)
        return cache[key][1]
    return wrapper

# Basic usage
@route('/api/v1/get_data')
@cache
def get_remote_api(env):
    response.content_type = 'application/json; charset=utf-8'
    # Fetching heavy JSON from remote site
    data = requests.get('https://example.com/very_heavy.json').json()
    # Process you JSON
    # ...
    return json.dumps(data)

run(host='0.0.0.0', port=8080)