What does a cache do when a request is sent to the server?
The cache should not store anything about the client request or server response. A request is sent to the server and a full response is downloaded each and every time. A cache will send the request to the origin server for validation before releasing a cached copy.
Which is a successful result of a caching request?
Common forms of caching entries are: Successful results of a retrieval request: a 200 (OK) response to a GET request containing a resource like HTML documents, images or files. Permanent redirects: a 301 (Moved Permanently) response. Error responses: a 404 (Not Found) result page. Incomplete results: a 206 (Partial Content) response.
When does revalidation of a cached document occur?
Cache validation. When a cached document’s expiration time has been reached, it is either validated or fetched again. Validation can only occur if the server provided either a strong validator or a weak validator. Revalidation is triggered when the user presses the reload button.
How does caching improve the performance of a web site?
HTTP caching The performance of web sites and applications can be significantly improved by reusing previously fetched resources. Web caches reduce latency and network traffic and thus lessen the time needed to display a representation of a resource. By making use of HTTP caching, Web sites become more responsive.
Is there a caching mechanism in the HTTP protocol?
The HTTP protocol contains built in support for an in-line caching mechanism described by section 13 of RFC2616, and the mod_cache module can be used to take advantage of this.
When do HTTP Basic authentication requests go to cache?
Requests with an “Authorization” header (for example, HTTP Basic Authentication) are neither cacheable nor served from the cache when mod_cache is running in this phase. This phase happens late in the request processing, after all the request phases have completed.
When to enable or disable response caching in ASP.NET?
The ResponseCacheAttribute specifies the parameters necessary for setting appropriate headers in response caching. Disable caching for content that contains information for authenticated clients. Caching should only be enabled for content that doesn’t change based on a user’s identity or whether a user is signed in.