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Updating cache

updating cache-57

On Refreshyourcache you can find tutorials on how to refresh the cache from your browser.To ensure you see the latest version of a site you need to clear the cache memory.

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Most times a simple force cache refresh won't work and you need to clear the cache by hand.This may be because your Internet Service Provider also has a cache and their cache may not be set up quite right, and they are not downloading the latest web pages.Fetching something over the network is both slow and expensive.When the server returns a response, it also emits a collection of HTTP headers, describing its content-type, length, caching directives, validation token, and more.For example, in the above exchange, the server returns a 1024-byte response, instructs the client to cache it for up to 120 seconds, and provides a validation token ("x234dff") that can be used after the response has expired to check if the resource has been modified.If the fingerprint is still the same, then the resource hasn't changed and you can skip the download.

In the preceding example, the client automatically provides the ETag token in the "If-None-Match" HTTP request header.

Depending on your operating system all you need to do is the following key combination: Windows: ctrl F5 Mac/Apple: Apple R or command R Linux: F5 Internet cache can threat to your privacy as everyone who has access to your computer can see some personal information by simply opening the cache folder.

Also when the cache fills up, performance can slow down and your hard drive may run out of space.

The server checks the token against the current resource.

If the token hasn't changed, the server returns a "304 Not Modified" response, which tells the browser that the response it has in cache hasn't changed and can be renewed for another 120 seconds.

However, that’s inefficient because if the resource hasn't changed, then there's no reason to download the same information that's already in cache!