What is Cache-Control max age?

What is Cache-Control max age?

Cache-control: max-age It is the maximum amount of time specified in the number of seconds. For example, max-age=90 means that a HTTP response remains in the browser as a cached copy for the next 90 seconds before it can be available for reuse.

What is ExpiresActive?

ExpiresActive Directive This directive enables or disables the generation of the Expires and Cache-Control headers for the document realm in question. If set to On , the headers will be added to served documents according to the criteria defined by the ExpiresByType and ExpiresDefault directives (q.v.).

How do you use Cache-Control headers?

To use Cache-Control headers, choose Content Management | Cache Control Directives in the administration server. Then, using the Resource Picker, choose the directory where you want to set the headers. After setting the headers, click ‘OK’.

What should you add to a Cache-Control response header?

Caching static assets For the files in the application that do not change, you can usually add aggressive caching by sending the response header below. This includes static files that are served by the application such as images, CSS files and JavaScript files. In addition, see also the Expires header.

How long is Max-age 31536000?

one year
max-age: Defines the maximum time that the content may be cached before it must be revalidated or downloaded again from the original server. This option generally replaces the expires header (see below) and takes a value in seconds, with a maximum valid age of one year (31536000 seconds).

How do I change my cache-control max-age?

Cache-Control: max-age= This directive tells the browser or intermediary cache how long the response can be used from the time it was requested. A max-age of 3600 means that the response can be used for the next 60 minutes before it needs to fetch a new response from the origin server.

How long is Max age 31536000?

How do I disable Apache cache?

How To Disable Apache Cache

1. Open . htaccess file. There are many ways to disable Apache cache.
2. Disable Apache Cache. Let’s say you want to disable caching html, js, css files only, then add the following lines to your .
3. Restart Apache Server. Restart Apache Server to apply changes $ sudo service apache2 restart.

How do you use cache-control max-age?

What is Max-age header?

max-age. The max-age directive states the maximum amount of time in seconds that fetched responses are allowed to be used again (from the time when a request is made). For instance, max-age=90 indicates that an asset can be reused (remains in the browser cache) for the next 90 seconds.

How do I change my Cache-Control max-age?

What’s the difference between Max-age and expires?

Quick Answer: Expires sets an expiry date for when a cookie gets deleted. Max-age sets the time in seconds for when a cookie will be deleted (use this, it’s no longer 2009)

How to change cache-control directive other than Max-age?

To modify Cache-Control directives other than max-age (see RFC 2616 section 14.9 ), you can use the Header directive. When the Expires header is already part of the response generated by the server, for example when generated by a CGI script or proxied from an origin server, this module does not change or add an Expires or Cache-Control header.

How is Cache-Control-max-age calculated in Apache?

The Cache-Control: max-age is calculated by subtracting the request time from the expiration date and expressing the result in seconds. The base time is either the last modification time of the file, or the time of the client’s access to the document.

Which is cache overrides max-age or Expires header?

Overrides max-age or the Expires header, but only for shared caches (e.g., proxies). Ignored by private caches. Indicates the client will accept a stale response. An optional value in seconds indicates the upper limit of staleness the client will accept.

What do you need to know about Apache expires?

Apache Module mod_expires. Available Languages: en | fr | ja | ko. This module controls the setting of the Expires HTTP header and the max-age directive of the Cache-Control HTTP header in server responses. The expiration date can set to be relative to either the time the source file was last modified, or to the time of the client access.