![]() Now, we are going to create an ASP.NET Core application and see the cache directives in action. If any of the fields changes, the server generates a new response. ![]() Vary – indicates that it can send a cached response only if all the fields that we provide in the header match exactly with the previous request. If we specify the cache-control header, it will ignore the pragma header. Cache-Control is a powerful HTTP header when it comes to speeding. Although its ability to increase website speed is not it's only as it is also quite useful to help make private information less vulnerable. The pragma header is for backward compatibility with HTTP 1.0 specification and the no-cache directive. I tried adding the section to the web.config but, this sets the cache-control header to private, public, expires74464 which still prevents. We are going to discuss this in detail while working on the examples.Īpart from the cache-control, there are a few other headers that can control the caching behavior: No-cache and no-store may sound similar and even behave similarly, but there are some differences in the way browsers or clients understand both. no-store – indicates that a cache must not store the response. ![]() no-cache – specifies that a cache must not use a stored response for any requests.private – indicates that only a private cache on the client-side may store the response, but not a shared cache.public – indicates that a cache can store the response either at the client-side or at a shared location.So, let’s inspect the common cache-control directives: When the cache-control header is present in the response, browsers, clients, and proxy servers should honor the headers and comply with them. The cache-control is the primary header field that we use to specify the way response can be cached. Now, let’s talk about different HTTP Cache Directives and how we can control the caching behavior using those directives. As per the HTTP 1.1 Response Cache Specification, browsers, clients and proxies should conform to the caching headers. Once we set the response caching headers, clients and other proxies can read those to determine how to cache the response from the server. Furthermore, we can use the Response Caching Middleware to control the caching behavior from the server-side. Additionally, this will free up the server from processing and generating the same response multiple times.ĪSP.NET Core uses the ResponseCache attribute to set the response caching headers. This will help in serving future requests for the same resources very quickly. Response Caching is the mechanism of caching a server’s response by a browser or other clients. To download the source code for this article, you can visit our GitHub repository.
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