Add Expires headers

Question

Add Expires headers There are 21 static components without a far-future expiration date       http   static doers lk examples-offline css     http   static doers lk kendo common min css     http   static doers lk kendo default min css     http   static doers lk style css     http   static doers lk jquery min js     http   static doers lk kendo web min js     http   static doers lk console js     http   static doers lk sprite png     https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         https   fbexternal-a akamaihd net safe image php         http   static doers lk favicon PNG   When testing the site using yahoo YSLOW it says above message  So I don t know how to add expire headers  Any help would be appreciated

User · Answer

In ASP NET there is similar object  you can use Caching Portions in WebFormsUserControls in order to cache objects of a page for a period of time and save server resources  This is also known as fragment caching   If you include this code to top of your user control  a version of the control stored in the output cache for 150 seconds  You can create your own control that would contain expire header for a specific resource you want     lt    OutputCache Duration  150  VaryByParam  None    gt    This article explain it completely   Caching Portions of an ASP NET Page

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try this solution and it is working fine for me      EXPIRES CACHING     lt IfModule mod expires c gt  ExpiresActive On ExpiresByType image jpg  access 1 year  ExpiresByType image jpeg  access 1 year  ExpiresByType image gif  access 1 year  ExpiresByType image png  access 1 year  ExpiresByType text css  access 1 month  ExpiresByType text html  access 1 month  ExpiresByType application pdf  access 1 month  ExpiresByType text x-javascript  access 1 month  ExpiresByType text css  access plus 1 year  ExpiresByType application x-shockwave-flash  access 1 month  ExpiresByType image x-icon  access 1 year  ExpiresDefault  access 1 month   lt  IfModule gt    lt IfModule mod headers c gt     lt FilesMatch     js css xml gz    gt      Header append Vary  Accept-Encoding    lt  FilesMatch gt   lt  IfModule gt    lt ifModule mod gzip c gt  mod gzip on Yes mod gzip dechunk Yes mod gzip item include file   html  txt css js php pl   mod gzip item include handler  cgi-script  mod gzip item include mime  text    mod gzip item include mime  application x-javascript   mod gzip item exclude mime  image    mod gzip item exclude rspheader  Content-Encoding   gzip    lt  ifModule gt    lt IfModule mod deflate c gt  SetOutputFilter DEFLATE AddOutputFilterByType DEFLATE text html text css text plain text xml text x-js text js   lt  IfModule gt      EXPIRES CACHING

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The easiest way to add these headers is a  htaccess file that adds some configuration to your server  If the assets are hosted on a server that you don t control  there s nothing you can do about it   Note that some hosting providers will not let you use  htaccess files  so check their terms if it doesn t seem to work   The HTML5Boilerplate project has an excellent  htaccess file that covers the necessary settings  See the relevant part of the file at their Github repository  These are the important bits    ----------------------------------------------------------------------   Expires headers  for better cache control    ----------------------------------------------------------------------    These are pretty far-future expires headers    They assume you control versioning with filename-based cache busting   Additionally  consider that outdated proxies may miscache   www stevesouders com blog 2008 08 23 revving-filenames-dont-use-querystring     If you don t use filenames to version  lower the CSS and JS to something like    access plus 1 week     lt IfModule mod expires c gt    ExpiresActive on    Your document html   ExpiresByType text html  access plus 0 seconds     Media  images  video  audio   ExpiresByType audio ogg  access plus 1 month    ExpiresByType image gif  access plus 1 month    ExpiresByType image jpeg  access plus 1 month    ExpiresByType image png  access plus 1 month    ExpiresByType video mp4  access plus 1 month    ExpiresByType video ogg  access plus 1 month    ExpiresByType video webm  access plus 1 month     CSS and JavaScript   ExpiresByType application javascript  access plus 1 year    ExpiresByType text css  access plus 1 year   lt  IfModule gt    They have documented what that file does  the most important bit is that you need to rename your CSS and Javascript files whenever they change  because your visitor s browsers will not check them again for a year  once they are cached

User · Answer

You can add them in your htaccess file or vhost configuration   See here   http   httpd apache org docs 2 2 mod mod expires html  But unless you own those domains    they are our of your control

User · Answer

lt IfModule mod expires c gt        Enable expirations     ExpiresActive On         Default directive     ExpiresDefault  access plus 1 month         My favicon     ExpiresByType image x-icon  access plus 1 year         Images     ExpiresByType image gif  access plus 1 month      ExpiresByType image png  access plus 1 month      ExpiresByType image jpg  access plus 1 month      ExpiresByType image jpeg  access plus 1 month         CSS     ExpiresByType text css  access plus 1 month         Javascript     ExpiresByType application javascript  access plus 1 year   lt  IfModule gt

[html] Add Expires headers

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