304 not modified

"100″: Continue (continue) The initial request has been accepted and the customer should continue to send the remainder of the request. (HTTP 1.1 new)"101″: Switching protocols (switching protocol) The requestor has asked the server to switch

In the previous article "ASP." NET performance optimization in the browser cache Dynamic Web page in the scenario, the browser sends if-modified-since will need to use their own cache to the Web server to decide, the server tells the browser to read

Tidy up.1XX (Temporary response)A status code that represents a temporary response and requires the requestor to continue the operation.Code description100 (continued) The requesting person shall continue to make the request. The server returns this

TimeOut and event processing problems of jQuery and ExtJS, jqueryextjs For jQuery, you can directly set the timeout parameter for timeout and capture the second parameter in the error event. If it is a "timeout", it indicates that the timeout event

In fact, Ajax has been in use for a long time, but it has never been time to look for the book system seriously. It has been quite time-consuming recently. This series is based on the combination of Ajax and PHP, mainly to share experiences with

5.1 HTTP Request Header OverviewHTTP client programs (such as browsers) must specify the request type (usually GET or POST) when sending requests to the server ). If necessary, the customer program can also choose to send other request headers. Most

Some of the common status codes are:200-Server successfully returned to Web page404-The requested page does not exist503-Service Not availableDetailed decomposition:1XX (Temporary response)A status code that represents a temporary response and

1 HTTP Overview 1.1 HTTP IntroductionHTTP is an abbreviation for Hyper Text Transfer Protocol (Hypertext Transfer Protocol). HTTP is a transfer protocol used to transfer hypertext from a WWW server to a local browser. It can make the browser more

where you press Enter in the address bar is divided into two cases. One is that the requested URI does not expire in the browser cache, at this point, the HTTP request message header displayed in the browser using the Firefox Firebug plugin is as

Referenced from: http://blog.csdn.net/yefan2222/article/details/6198098Http://baike.baidu.com/view/1628025.htm?fromtitle=http&fromid=243074&type=syn1.HTTP protocolThe basic protocol for Internate is TCP/IP (Transmission Control Protocol and Internet

Name of parameter Type Describe wr. String (Default: Current page address) sends the requested address. Type String (Default: "Get") The Request method ("POST" or "get"), the default is "get".

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.cnblogs.com/TankXiao/archive/2012/11/28/2793365.htmlThe concept of cachingCaching this thing is really ubiquitous, there are browser-side caches, server-side caches, proxy server caches, ASP. NET page cache, object cache. The

ProfileWhen a user tries to access content on a server that is running Internet Information Services (IIS) through HTTP or File Transfer Protocol (FTP), IIS returns a numeric code that represents the status of the request. This status code is logged

The header in PHP is divided into three parts:The first part: The version of the HTTP Protocol (http-version);The second part: status code;The third part: The reason phrase (reason-phrase).Example code:Return page HTTP information with the header

The HTTP status code is divided into five main categories:100~199: Information Tips200~299: Success300~399: redirect400~499: Client Error500~599: Server ErrorStatus codes provide a convenient way for clients to understand the results of a

HTTP Status Code meaning 1XX** Continue: Informs the client that the operation can continue　　 * 101 Switching protocols: When a client needs to make a communication protocol switch, the server-side response is used in conjunction with the upgrade

Common HTTP 1.1 status codes and their corresponding status information and meaningsContinue the initial request has been accepted and the customer should continue to send the remainder of the request. (HTTP 1.1 new)101 Switching Protocols Server

1) What is "last-modified"?When the browser requests a URL for the first time, the server-side return status is 200, the content is the resource you requested, and there is a last-modified attribute that marks the last time the file was modified at

If a request is made to your server to display a webpage on your site (for example, when a user accesses your page through a browser or when Googlebot crawls the page), your server returns an HTTP status code in response to the request.This status