304 not modified

This is a creation in Article, where the information may have evolved or changed. Statement This article is just a summary of my personal reading materials and engineering practices, which may not be the best practice. But hopefully, some help will

Use ETags to reduce Web application bandwidth and load by 12th pages. Recently, the public has been strongly interested in the REST-style application architecture, which indicates that the elegant design of the Web is being noticed. Now, we

RESTful API Design Best PracticesSummary:The internet is now awash with articles about how restful APIs (for convenience, one meaning for future APIs and restful APIs) are designed, yet there is no "all-in-one" design standard: How do you do it?

PHP header sets the common file type of Content-type, In PHP, you can send header information through the header function, you can also set the file Content-type, the following collation of some common file types for the Content-type value. Date 201

HTTP status code and definition parsing Ajax capture callback error reference The status line contains the HTTP Version, status code, and brief descriptions corresponding to the status code. In most cases, all Response Headers except Content-Type

HTTP protocol is an application layer protocol, which consists of request and response, is a standard client server-side model and is a stateless protocol.The HTTP protocol is usually hosted on top of the TCP protocol, sometimes hosted on a TLS or

In the actual application of the site construction, prone to a lot of small mistakes, like MySQL was optimized not in place, the impact of the overall site browsing effect, in fact, the site's regular HTTP status code performance is the same, Google

Original: http://www.67bar.com/archives/1229HTTP consists of two parts: request and response. When you enter a URL in a Web browser, the browser creates and sends a request based on your request, which contains the URL you entered and some

HTTP 400-Invalid requestHTTP 401.1-Unauthorized: Logon failedHTTP 401.2-Unauthorized: Server configuration issues cause logon failureHTTP 401.3-acl prohibit access to resourcesHTTP 401.4-Unauthorized: Authorization denied by filterHTTP

Transferred from: http://www.cnblogs.com/TankXiao/What is an HTTP status codeThe HTTP status code is used by the Web server to tell the client what has happened.The status code, located in the first line of HTTP Response, returns a "three-digit

1. About HTTP MessagesSee: http://www.runoob.com/http/http-messages.htmlThe request header in an HTTP message is the information the browser wants to tell the server, and the response header is the information the server wants to tell the client.

Reprinted from: http://desert3.iteye.com/blog/1136548502 Bad Gateway:tomcat didn't start up.504 Gateway Time-out:nginx reported errors, usually nginx as a reverse proxy server, the connected application server such as Tomcat did not cause the

The HTTP header field includes class 4:     general-header; Generic headers      request-header; Request Header      Response-header; Response Header      Entity-header. Entity Header  *****************************************************************

Introduction Recently, the public has been strongly interested in the REST-style application architecture, indicating that the elegant design of the Web has begun to attract attention. Now, we gradually understand the scalability and elasticity

Note:1. the compressed files are cached on the server, and the re-access reduces the re-compression time to reduce the CPU usage.2. You can set the Client File Cache Time to reduce the number of re-requests by more than 85%.3. Because the image is

This article is reproduced to http://blog.csdn.net/kfanning/article/details/6062118/HTTP consists of two parts: request and response. When you enter a URL in a Web browser, the browser creates and sends a request based on your request, which

CacheRe-authentication of the cache:Because the files on the original server are subject to change at any time, the cache needs to be detected from moment to time, compared to whether the local cache is the same as on the original server, and this

Apahce uses the mod_deflate compression module. Each time the client (such as a browser) retrieves data from the server (ps: Expires is not expired), the status code of the http request header is always 200, instead of 304 Not Modified.304 Not

What is a status code?The function of the status code is: The server tells the client what happened.The status code in the HTTP protocol is now the first line of HTTP response. It returns a three-digit status code and status information. Status code

Original address: http://tools.ietf.org/html/rfc2616#section-14.9Content of this articleOverviewTermsHTTP Cache-control HeaderResources that can be cachedResources that can be stored in cacheModify the basic expiration mechanismCache