no cache

Explore the usage of headers in php. Header () isusedtosendrawHTTPheaders. SeetheHTTP1.1specificationformoreinformationonHTTPheaders. Example 1: Copy the code as follows :? PHPHeader (Location: http: Header()Is used to send raw HTTPHeaders. See the

PHP forms are backed up after submission, and the contents of the form are emptied by default (when using Session_Start). The workaround is after Session_Start (), the character output is written before the Copy CodeThe code is as follows: Header ("

In this case, why cannot I download files? $ Root = "D:/wamp/www/New Folder /"; If (is_dir ($ root )) { $ OpenHandle = opendir ($ root ); While (false! ==( $ File = readdir ($ openHandle ))) { If (! Is_dir ($ root. $ file )) { Echo "". $ file

I have written an article [http protocol details]. This time I will continue to introduce the caching mechanism in HTTP. The HTTP Protocol provides a very powerful caching mechanism. Understanding these caching mechanisms is very helpful for

Header ()Is used to send raw HTTPHeaders. See the HTTP/1.1 specification for more information on HTTPHeaders. Example 1:Copy codeThe Code is as follows: Header ("Location: http://www.jb51.net ";);Exit; // after each redirection, you must add "exit"

The function of browser review is divided into the following situations:(1) open a new windowIf the values are private, no-cache, and must-revalidate, the server will be accessed again when a new window is opened.If the max-age value is specified,

1. Download Alpine image[email protected] ~]# Docker pull alpineusing default tag:latesttrying to pull repository docker.io/library/alpine ... la Test:pulling from Docker.io/library/alpine4fe2ade4980c:pull completedigest:sha256 : 621c2f39f8133acb8e64

I. Overview The cache idea can be applied to all layers of software hierarchy. It is an internal mechanism that is imperceptible to the outside world. The database itself has a cache, And the persistence layer can also be cached. (For example,

Php forms are submitted and then rolled back. The content of the form is cleared by default (when session_start is used ), The solution is to write it after session_start () and before the character output Copy codeThe Code is as follows: header

 I. Overview The cache idea can be applied to all layers of software hierarchy. It is an internal mechanism that is imperceptible to the outside world. The database itself has a cache, And the persistence layer can also be cached. (For example,

This article mainly introduces the Pyspider to the crawler to forge a random request head of the example, has a certain reference value, now share to everyone, the need for friends can refer to Pyspider uses the Tornado Library to do HTTP requests,

I. OverviewThe idea of caching can be applied at all levels of software layering. It is an internal mechanism that is not perceptible to the outside world.The database itself is cached, and persistent layers can be cached. (e.g. hibernate, 1-and

1. Add in the header of the ASP page   Reference content is as follows:Response. Buffer = trueResponse. expiresabsolute = now ()-1Response. expires = 0Response. cachecontrol = "no-Cache"Response. addheader "Pragma", "No-Cache"   2.

The cache of web pages is controlled by "cache-control" in the HTTP message header. common values include private, no-cache, Max-age, and must-revalidate, the default value is private. The function of browser review is divided into the following

Header usage The Header () function sends an original HTTP header [HTTP header] to the client.The header is the string sent by the server before the server passes HTML data to the browser with HTTP co-meaning.Separate HTML files with a blank line.

OutputCache attribute details 1 Location, outputcache Directory OutputCache Concept Learning OutputCache attributes (1) OutputCache attribute description 1 Location   Cache location in Web applications: Client Caching) Proxy Caching)

Normally, the browser caches the page. In this case, you can access the page just after exiting. For example, you can access the page just cached after exiting, in some cases, this is not safe enough. The solution to the problem is as

1. Compress output with Mod_deflate module (start gzip) Open mod_deflate sudo a2enmod deflatesudo/etc/init.d/apache2 restart Add in httpd.conf #单独设置需要压缩的类型AddOutputFilterByType deflate text/html text/plain text/xml text/ Cssaddoutputfilterbytype

The cache of the Web page is controlled by the "Cache-control" in the HTTP message header, and the common values are private, No-cache, Max-age, must-revalidate, etc., and the default is private. Its function is divided into the following situations

By default, the cache policy is enabled in IE. Both the page and the data requested by ajax meet a url. The url is an instance of the uri (Uniform Resource Identifier), and the url is the resource identifier.Write a demo for verification. Test