是我没说清楚。cache-control设置为no-cache, no-store。

复现：

from flask import Flask
app = Flask(__name__)


@app.route('/')
def index():
    doc = """<h1>{} times</h1>
    <ul>
    <li><a href="/uncache1"> cache-control: no-cache, no-store</a></li>
    <li><a href="/uncache2"> cache-control: max-age=0</a></li>
    <li><a href="/log">log</a></li>
    </ul>"""
    return doc.format(str(time))

@app.route('/log')
def logger():
    global time
    doc = """<h1>{} times</h1>
    <h2>Please turn back</h2>"""
    time += 1
    return doc.format(time)

@app.route('/uncache1')
def uncache1():
    doc = """<h1>{} times</h1>
    <ul>
    <li><a href="/">cache-control: unset</a></li>
    <li><a href="/log">log</a></li>
    </ul>"""
    return doc.format(str(time)), [("cache-control", "no-cache, no-store")]

@app.route('/uncache2')
def uncache2():
    doc = """<h1>{} times</h1>
    <ul>
    <li><a href="/">cache-control: unset</a></li>
    <li><a href="/log">log</a></li>
    </ul>"""
    return doc.format(str(time)), [("cache-control", "max-age=0")]

if __name__ == '__main__':
    time = 0
    app.run(port=80,host="0.0.0.0")

够清楚了吧？