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What is a cache-control directive?

What is a cache-control directive?

Standard Cache-Control directives that can be used by the server in an HTTP response. Extension Cache-Control directives are not part of the core HTTP caching standards document. Check the compatibility table for their support; user-agents that don't recognize them should ignore them. [0]

Thereof, What is HTTP Cache Control header? Cache-Control. The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Header type. [0]

Subsequently, What directives are available when using cache-control? The following is a list of the common directives used and configured when using the Cache-Control header. See HTTP/1.1 section 14.9 for a further explanation of the directives available. no-cache uses the ETag header to tell caches that this resource cannot be reused without first checking if the resource has changed on the origin server. [1]

Likewise, people ask, What is Cache-Control and how does it work? What is Cache-Control? Cache-Control is an HTTP cache header comprised of a set of directives that allow you define when / how a response should be cached and for how long. HTTP caching occurs when a browser stores copies of resources for faster access. [1]

Besides, What is the difference between standard and extension cache control? Standard Cache-Control directives that can be used by the client in an HTTP request. Standard Cache-Control directives that can be used by the server in an HTTP response. Extension Cache-Control directives are not part of the core HTTP caching standards document. [0]

What is HTTP Cache Control header?

What is HTTP Cache Control header?

How do I Check my HTTP cache headers? You can check your HTTP Cache Headers using KeyCDN's HTTP Header Checker tool. 5. Extension Cache-Control directives [1]

Similarly one may ask, What is an HTTP Cache-Control Directive? The HTTP specification enables the server to send several different Cache-Control directives which control how and for how long individual responses are cached by browsers among other intermediate caches such as a CDN. [1]

Additionally, What is a cache-control header? Cache-control is an HTTP header used to specify browser caching policies in both client requests and server responses. Policies include how a resource is cached, where it’s cached and its maximum age before expiring (i.e., time to live). [2]

Likewise, people ask, What are the HTTP headers used for caching? The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Header type. Request header, Response header. Forbidden header name. [0]

What directives are available when using cache-control?

What directives are available when using cache-control?

Subsequently, What are the HTTP Cache Control directives? Many years ago, HTTP 1.1 introduced specialized Cache Control directives to control the behavior of browser caches and proxy caches. These were a refinement over the HTTP 1.0 headers that programmers were using to control the behavior of caches. Though these directives are several years old, we still see them being used incorrectly. [9]

Simply so, What is the difference between standard and extension cache control? Standard Cache-Control directives that can be used by the client in an HTTP request. Standard Cache-Control directives that can be used by the server in an HTTP response. Extension Cache-Control directives are not part of the core HTTP caching standards document. [0]

Accordingly, What is a cache-control header? Cache-control is an HTTP header used to specify browser caching policies in both client requests and server responses. Policies include how a resource is cached, where it’s cached and its maximum age before expiring (i.e., time to live). [2]

Similarly, people ask, What are the HTTP headers used for caching? The Cache-Control HTTP header holds directives (instructions) for caching in both requests and responses. A given directive in a request does not mean the same directive should be in the response. Header type. Request header, Response header. Forbidden header name. [0]

What is Cache-Control and how does it work?

What is Cache-Control and how does it work?

Similarly one may ask, What is Cache-Control and how does it work? What is Cache-Control? Cache-Control is an HTTP cache header comprised of a set of directives that allow you define when / how a response should be cached and for how long. HTTP caching occurs when a browser stores copies of resources for faster access. [1]

Beside this, What is caching in computer? In computing, a cache is a high-speed data storage layer which stores a subset of data, typically transient in nature, so that future requests for that data are served up faster than is possible by accessing the data’s primary storage location. Caching allows you to efficiently reuse previously retrieved or computed data. How does Caching work? [1]

Likewise, people ask, What is cache data and how does it work? Cached data works by storing data for re-access in a device’s memory. The data is stored high up in a computer’s memory just below the central processing unit (CPU). It is stored in a few layers, with the primary cache level built into a device’s microprocessor chip, then two more secondary levels that feed the primary level. [7]

Furthermore, What does private cache-control mean? It's not specified. For me, a more concrete example of Cache-Control: private is that proxy servers (which typically have many users) won't cache it. It is meant for the end user, and no one else. FYI, the RFC makes clear that this does not provide security. [5]

What is the difference between standard and extension cache control?

What is the difference between standard and extension cache control?

Similarly one may ask, What is the Cache-Control header? Cache-Control header was defined as part of the HTTP/1.1 specification and supersedes previous headers (e.g. Expires) used to define response caching policies. All modern browsers support Cache-Control, hence that is all we will need. Show activity on this post. [3]

Beside this, What is the difference between custom controllers and controller extensions? Use custom controllers when you want your Visualforce page to run entirely in system mode, which does not enforce the permissions and field-level security of the current user. A controller extension is an Apex class that extends the functionality of a standard or custom controller. [4]

Beside this, What is the difference between standard controllers and extensions in Salesforce? Salesforce Provided standard controllers for most of the standard and custom objects. Extensions are not actually controller, they are used to extend the functionalities of a standard salesforce controller. These are used in conjunction with standard controllers. You can have a single controller and multiple extensions on a visualforce page. [4]

Also Know, What is the difference between Cache-Control and expires? To sum up though, Expires is recommended for static resources like images and Cache-Control when you need more control over how caching is done. It's worth commenting that cache-control is what all browsers will use, but it's useful to specify both headers just in case there are old proxies in the way. [3]

References

  • developer.mozilla.org, Cache-Control - HTTP | MDN.
  • HTTP Cache Headers - A Complete Guide - KeyCDN, keycdn.com.
  • HTTP Cache Headers - A Complete Guide - KeyCDN, keycdn.com.
  • What is Cache-Control and How HTTP Cache Headers Work, imperva.com.
  • keycdn.com, Cache-Control - How to Properly Configure It - KeyCDN Support.
  • Cache Control Directives Demystified - Paladion, paladion.net.
  • What is Cache-Control and How HTTP Cache Headers Work, imperva.com.
  • keycdn.com, Cache-Control - How to Properly Configure It - KeyCDN Support.
  • What is Caching and How it Works | AWS, aws.amazon.com.
  • What is caching? | How is a website cached? | Cloudflare, fortinet.com.
  • http - What is Cache-Control: private? - Stack Overflow, stackoverflow.com.
  • what’s the difference between Expires and Cache-Control headers, stackoverflow.com.
  • What is the basic difference between Standard, Custom and Extension, forcetalks.com.
  • What is the basic difference between Standard, Custom and Extension, forcetalks.com.
  • what’s the difference between Expires and Cache-Control headers, stackoverflow.com.
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