SSI Learning (1)

Overview

We usually talk about the caching technology, most of which are page-based. For example, the results that will be executed on a news website are cached as a static html file, the next time you access this static page, you will be directed to it!

Reduces the pressure on servers! However, if most pages are static, but some of them need to be dynamic, what should we do? In this case, you can use the dynamic content cache technology!

Solution

The most common solutions are CSI, SSI, and ESI.

CSI

CSI implemented the dynamic inclusion of the content of another page through IFRAME, JavaScript, Ajax, and other methods.

SSI

The SSI principle is to call the corresponding files of each module through SSI, and finally assemble them into HTML pages. The server module is required to support (commonly used Apache and ngnix). The disadvantage is that it cannot directly contain URLs of other servers,

It can only run on the current server.

ESI

ESI uses a simple markup language to describe content fragments in webpages that can be accelerated or cannot be accelerated, each web page is divided into different small parts to assign different Cache control policies,

The cache server can dynamically combine different parts of a page before sending the complete webpage to the user based on these policies. This control can effectively reduce the number of times the whole page is crawled from the server,

However, only a small number of uncacheable fragments are extracted from the original server, which can effectively reduce the load on the original server and increase the response time of user access. Unlike SSI, ESI is mostly used on Cache servers or proxies.

Run on the server!

Currently, CSI and SSI are most commonly used, and ESI has fewer applications. For CSI and SSI, because the cache cannot be updated in a timely manner, there are currently fewer applications than ssi.

Summary:

	Application Mode	Command mode	Page suffix
CSI	Client	No instructions required. Ajax/iframe implementation requires no server support	Common suffixes
SSI	Server	SSI commands require support from dedicated servers	*. Shtml; *. inc
ESI	Server	ESI commands must be supported by dedicated servers	Common suffixes

Reference: http://www.cnblogs.com/wbinblog/archive/2012/05/16/2503528.html

SSI Learning (1)