如何防止缓存响应(烧瓶服务器,使用chrome)

Question

编辑:想出来,按F12,单击网络,选中"禁用缓存".

我有一个基本的烧瓶服务器,我正在学习d3.问题是chrome给了我一个我正在使用的缓存javascript文件,example.js.

请求方法:GET状态代码:200 OK(来自内存缓存)

服务器本身正在发送一个非缓存的响应,我可以通过直接查看响应来看到:

/static/example.js

我在application.py中添加了这个以防止缓存.

@app.after_request
def add_header(r):
    """
    Add headers to both force latest IE rendering engine or Chrome Frame,
    and also to cache the rendered page for 10 minutes.
    """
    r.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
    r.headers["Pragma"] = "no-cache"
    r.headers["Expires"] = "0"
    r.headers['Cache-Control'] = 'public, max-age=0'
    return r

这是整个代码

import os
import re
from flask import Flask, jsonify, render_template, request, url_for
from flask_jsglue import JSGlue

from flask import send_file

# configure application
app = Flask(__name__)
JSGlue(app)

# prevent cached responses
@app.after_request
def add_header(r):
    """
    Add headers to both force latest IE rendering engine or Chrome Frame,
    and also to cache the rendered page for 10 minutes.
    """
    r.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
    r.headers["Pragma"] = "no-cache"
    r.headers["Expires"] = "0"
    r.headers['Cache-Control'] = 'public, max-age=0'
    return r

@app.route("/<string:filename>")
def main(filename):
    """Render file."""
    return render_template(filename)

@app.route("/favicon.ico")
def favicon():
    filename = 'images/fav.png'
    return send_file(filename, mimetype='image/png')

谢谢阅读.

Answer 1

要防止来自浏览器的缓存响应: - 按F12或右键单击>检查 - 单击网络选项卡 - 选中"禁用缓存".

要防止来自服务器的缓存响应:将以下定义添加到application.py:

# prevent cached responses
if app.config["DEBUG"]:
    @app.after_request
    def after_request(response):
        response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate, public, max-age=0"
        response.headers["Expires"] = 0
        response.headers["Pragma"] = "no-cache"
        return response