Flask-Caching如何使用提高性能

pip install Flask-Caching

from flask import Flask, request
from flask_caching import Cache

app = Flask(__name__)

# 配置 Flask-Caching（使用简单的内存缓存）
app.config['CACHE_TYPE'] = 'SimpleCache'  # 使用简单内存缓存
app.config['CACHE_DEFAULT_TIMEOUT'] = 300  # 默认缓存超时（秒）

cache = Cache(app)

@app.route('/')
@cache.cached(timeout=60)  # 为此路由缓存60秒
def index():
    return "Hello, World!"

if __name__ == '__main__':
    app.run(debug=True)

app.config['CACHE_TYPE'] = 'RedisCache'
app.config['CACHE_REDIS_HOST'] = 'localhost'
app.config['CACHE_REDIS_PORT'] = 6379
app.config['CACHE_REDIS_DB'] = 0
app.config['CACHE_DEFAULT_TIMEOUT'] = 600  # 10分钟

app.config['CACHE_TYPE'] = 'FileSystemCache'
app.config['CACHE_DIR'] = '/tmp/flask_cache'

@app.route('/data')
@cache.cached(timeout=120)  # 120秒缓存
def expensive_query():
    import time
    time.sleep(5)  # 模拟耗时操作
    return "Expensive data fetched!"

@cache.memoize(timeout=300)
def compute_expensive_result(x, y):
    import time
    time.sleep(5)  # 模拟耗时
    return x + y

@app.route('/compute')
def compute():
    result = compute_expensive_result(10, 20)
    return f"Computed result: {result}"

@app.route('/user')
@cache.cached(timeout=60, query_string=True)
def user_profile():
    username = request.args.get('name', 'Guest')
    return f"Hello, {username}!"

cache.set('my_key', 'my_value', timeout=300)  # 设置 300 秒

value = cache.get('my_key')
if value is None:
    value = "New Value"
    cache.set('my_key', value, timeout=300)
print(value)

cache.delete('my_key')

cache.clear()

def custom_cache_key():
    return request.full_path  # 以完整 URL 作为缓存键

@app.route('/product')
@cache.cached(timeout=300, key_prefix=custom_cache_key)
def product():
    return "Product data"

@app.route('/dashboard')
def dashboard():
    stats = cache.get('dashboard_stats')
    if not stats:
        stats = expensive_dashboard_calculation()
        cache.set('dashboard_stats', stats, timeout=600)
    return render_template('dashboard.html', stats=stats)

app.config['DEBUG'] = True
app.config['CACHE_TYPE'] = 'SimpleCache'
app.config['CACHE_DEFAULT_TIMEOUT'] = 60

import logging
logging.basicConfig(level=logging.DEBUG)