cache-control | 易学教程

Setting Cache-Control pubic not caching xhr

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问题 I am trying to implement caching for XHR reponse with in theory the browser should go to server, and server can decide to send 304 - Not Modified if there is no new dynamic data and the browser would use the cache response from its previous request. As per the theory, it could be done using no-cache on Cache-Control . But first I tried to use, if at all I can make the browser store the response by setting response.set('Cache-Control', 'public, max-age=315360000, max-stale'); I can see, it in

How to bypass varnish cache on client?

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问题 I'm trying to get new content from a Joomla website or Yii web application, and we're using varnish on server side. How to bypass varnish cache control so that I can get the new content?. I tried to add ?cachebuster=9999 to end of url but it's not working. I can get the new content only when I'm using a proxy. Any idea? 回答1: Add the port 8080 to bypass Varnish: Example: www.example.com:8080 来源： https://stackoverflow.com/questions/26447823/how-to-bypass-varnish-cache-on-client

How to make proxy revalidate resource from origin

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问题 I have an Nginx reverse proxy on the same machine as my origin server. I want the proxy to cache dynamic content from the origin, but when a client revalidates a resource, I want the proxy to revalidate with the origin too, and not just return a 304 to the client without checking the origin. For example if I set max-age to 60 seconds, the proxy will happily return 304 for that period without ever checking the origin. I've set up a test where the origin generates a new etag every second, like

How do I set Meteor to not cache anything for a specific page?

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问题 I am working on a project where I am using Meteor as an implementation. There are set of pages that are being cached and there's no concern. However, there is one page in the project that I am trying to set for no-cache. How do I achieve that? EDITED: Based on chosen accepted answer; I achieved the desired result with this wrapping code: if (Meteor.isServer) { Meteor.startup(function () { WebApp.rawConnectHandlers.use(function (req, res, next) { res.setHeader('cache-control', 'no-cache'); res

How do I set Meteor to not cache anything for a specific page?

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User space Vs Kernel space program performance difference

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问题 I have a sequential user space program (some kind of memory intensive search data structure). The program's performance, measured as number of CPU cycles, depends on memory layout of the underlying data structures and data cache size (LLC). So far my user space program is tuned to death, now I am wondering if I can get performance gain by moving the user space code into kernel (as a kernel module). I can think of the following factors that improve the performance in kernel space ... No system

spring security - how to remove cache control in certain url pattern

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问题 I am trying to filter some url pattern to caching. What I have attempted is put some codes into WebSecurityConfigurerAdapter implementation. @Override protected void configure(HttpSecurity http) throws Exception { initSecurityConfigService(); // For cache http.headers().defaultsDisabled() .cacheControl() .and().frameOptions(); securityConfigService.configure(http,this); } However this code will effect all of the web application. How can I apply this to certain URL or Content-Type like images

ASP.NET browser shows “web page has expired” for back button (after a post back)

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问题 I'm having trouble with a simple ASP.NET application and the back button after a post back. The page in question has a simple form on it, some text fields etc, and a dropdown that does a postback (autopostback). The "normal" flow is the user fills out the form and perhaps changes the dropdown. Based on the dropdown value the page content might change. The problem I'm having is that after the user has changed the dropdown and the postback has completed then the user clicks the back button.

优化建议解决方案：未设置max-age或expires

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 网页的缓存是由 HTTP 消息头中的 “Cache-control” 来控制的，常见的取值有 private、no-cache、max-age、must-revalidate 等，默认为private。其作用根据不同的重新浏览方式分为以下几种情况：（1）打开新窗口如果指定cache-control的值为private、no-cache、must-revalidate，那么打开新窗口访问时都会重新访问服务器。而如果指定了max-age值，那么在此值内的时间里就不会重新访问服务器，例如： Cache-control: max-age=5 表示当访问此网页后的5秒内再次访问不会去服务器。（2）在地址栏回车如果值为private或must-revalidate（和网上说的不一样），则只有第一次访问时会访问服务器，以后就不再访问。如果值为no-cache，那么每次都会访问。如果值为max-age，则在过期之前不会重复访问。（3）按后退按扭如果值为private、must-revalidate、max-age，则不会重访问，而如果为no-cache，则每次都重复访问（4）按刷新按扭无论为何值，都会重复访问当指定Cache-control值为“no-cache”时

与缓存有关的http-header

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 我们来看看每个header的具体含义。 Request Cache-Control: max-age=0 以秒为单位 If-Modified-Since: Mon, 19 Nov 2012 08:38:01 GMT 缓存文件的最后修改时间。 If-None-Match: "0693f67a67cc1:0" 缓存文件的Etag值 Cache-Control: no-cache 不使用缓存 Pragma: no-cache 不使用缓存 Response Cache-Control: public 响应被缓存，并且在多用户间共享，（公有缓存和私有缓存的区别，请看另一节） Cache-Control: private 响应只能作为私有缓存，不能在用户之间共享 Cache-Control:no-cache 提醒浏览器要从服务器提取文档进行验证 Cache-Control:no-store 绝对禁止缓存（用于机密，敏感文件） Cache-Control: max-age=60 60秒之后缓存过期（相对时间） Date: Mon, 19 Nov 2012 08:39:00 GMT 当前response发送的时间 Expires: Mon, 19 Nov 2012 08:40:01 GMT 缓存过期的时间（绝对时间）