must revalidate

What is an HTTP Headers? What does it contain? Using the Requests.get () function to request a watercress reading, the returned r.headers is as Follows:>>>ImportRequests>>> r = Requests.get ('https://book.douban.com/')>>>r.headers{'x-powered-by-ads':

After the WML page is downloaded to the WAP device, it will be kept in the WAP device memory for a period of time until this time expires. After that, the page will be downloaded from the server rather than from the cache of the WAP device. This

1 Content-TypeContent-Type is a very important Content in the returned message. It identifies the Type of the returned Content, and its value is in the format of "primary Type/subtype, for example, the most common one is text/html, which means that

Etag-last-modifiedAnd how does etags help improve performance? Use the HTTP header of the last-modified and etags requests together, so that the cache of the client (such as a browser) can be used. Because the server first generates the

Request Headers:I visited a url:http://www.hzau.edu.cn header and analyzed the function and functions of each part according to the concrete example.AcceptRole: The type of media that can be accepted by the browser side,For example: accept:text/html

This example describes the Symfony2 framework HTTP cache usage. Share to everyone for your reference, specific as follows: The nature of rich Web applications means their dynamics. No matter how efficient your application is, there is always a lot

Recently used PHP to do projects with a post to submit data and there is a session to do the record, run up, but there is a small problem, is submitted after the previous page will be back when it would appear page expired, to click Refresh can open

The caching of the Web page is controlled by the "Cache-control" in the HTTP message header, the common value has private, No-cache, Max-age, must-revalidate, etc., the default is private. Its role is divided into the following situations according

Tag: nbsp Cannot message control date span Enter temp file stylepragma and No-cacheUsed to define the page cache and not cache pages (to speed up some browsers will cache the pages viewed by the viewer, as defined below, browsers generally do not

1. Use header header to set cache control header Cache-control. PHP code1. The code is as follows Copy Code Header (' Cache-control:private, Must-revalidate '); Support page Bounce 2. Use the

This article is a PHP to prevent form recurrence of the method of the detailed analysis of the introduction, the need for friends under the reference PHP prevents forms from repeating instances: Copy Code code as follows: session_start (); $

pragma and No-cacheUsed to define the page cache and not cache pages (to speed up some browsers will cache the pages viewed by the viewer, as defined below, browsers generally do not cache pages, and browsers cannot browse offline.)Its function is

If you are just beginning to learn PHP, there may be many functions to study, today we will learn how to use the PHP Header (), more instructions, please refer to the PHP Chinese manual, the following is about the Header function detailed use

In the development process, often because the form error and return to the page when the information is missing, in order to support page bounce, can be achieved in two ways. First, use the header method to set the message header

When a WML page is downloaded to a WAP device, it is saved in the WAP device memory for a period of time until the time expires. After that, the page is downloaded from the server, not from the cache of the WAP device. This process is called

Two ways to support page back with PHP program In the development process, often because the form error and return to the page when the information is missing, in order to support page bounce, can be achieved in two ways. First, use the header

This article mainly introduces the use of HTTPCache in the Symfony2 framework, and analyzes the use skills related to the HTTP Cache of the Symfony framework in combination with the instance form. If you need it, refer to the example in this article

Use HTTP Headers to defend against WEB attacks (Part2) In the previous article "use HTTP Headers to defend against WEB attacks (Part1)" (http://www.bkjia.com/Article/201504/394123.html), we learned how to use the X-Frame option to defend against

PHP's CookieA cookie is a mechanism for storing data on a remote browser to track and identify users.PHP sends a cookie in the header of the HTTP protocol, so the Setcookie () function must be called before other information is exported to the

ASP. NET has many secrets. When you understand these secrets, you can make your ASP. NET applicationProgramThis greatly improves the performance. For example, when using membership and profile for authentication and authorization, you can simply