html Is there a tag to turn off caching in all browsers?

Our investigations have shown us that not all browsers respect the HTTP cache directives in a uniform manner. These way don’t use cache but for the docker builder and the base image referenced with the FROM instruction. Aside from performance, there is a behavior difference with browser history.

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HTTP 1.1 section 13.13 says that “expiration time does not apply to history mechanisms.” The no-cache header describes expiration, and so doesn’t apply to history mechanisms such as the back button. Thus, the user can navigate backward to a previous page with no-cache without the server being contacted. Until you do so, your browser will keep the old cached version, and won’t refresh it with a “normal refresh” (F5).

As you identified, no-cache doesn’t mean there is never caching, but rather that the user agent has to always ask the server if it’s OK to use what it cached. By contrast, no-store says to not even keep a copy, which means there’s nothing to ask about. If you know the answer to “Can I reuse this?” is always no, you get a performance boost by skipping cache validation and saving room in the cache for other data. Client would ask server if it has new version of data using those headers and if the answer is no it will serve cached data.

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On IE6, and Opera 9-10, hitting the back button still caused the cached version to be loaded. On all other browsers I tested, they did fetch a fresh version from the server. So far, I haven’t found any set of headers that will cause those browsers to not return cached versions of pin up online casino pages when you hit the back button. You should be aware that resources can also be cached in between the server and client. ISP’s, proxies, and other network devices also cache resources and they often use internal rules without looking at the actual resource.

Verifying the actual HTTP response headers

I was having the opposite problem – RUN directives were not being cached when I really needed them to. The problem was that I had inadvertently implemented the solution explained above, but couldn’t see it. This works because ADD will always fetch the file/URL and the above URL generates random data on each request, Docker then compares the result to see if it can use the cache.

The good news is that they typically cache for shorter time frames, like seconds or minutes. I understand the docker build –no-cache will disable caching for the entire Dockerfile. Any combination of client, or server can dictate what method, or set of methods, to use.

Caching headers are unreliable in meta elements; for one,any web proxies between the site and the user will completely ignorethem. You should always use a real HTTP header for headers such asCache-Control and Pragma. You can use the built-in cache attribute to prevent caching. You can also decorate some of the actions with this attribute if you need them to be non-cacheable, instead of decorating the whole controller.

These directives does not mitigate any security risk. They are really intended to force UA’s to refresh volatile information, not keep UA’s from being retaining information. At the very least, there is no guarantee that any routers, proxies, etc. will not ignore the caching directives as well. So we should use them with cautious overall when we are not in a local/dev environment.

How to set it?

If the server returns no-store, it’s not going to hit the cache, no matter what the client request type. If the client request was no-store, it doesn’t matter what the server returns, it won’t cache. If the client doesn’t specify a request type, the server will dictate it with Cache-Control. If the no-cache directive does not specify a field-name, then a cache MUST NOT use the response to satisfy a subsequent request without successful revalidation with the origin server. Use this middleware where-ever you intend to turn caching off.

Support

That covers about 99% of all browsers in use as of Jan ’10. Other Cache-Control parameters such as max-age are irrelevant if the abovementioned Cache-Control parameters are specified. The Last-Modified header as included in most other answers here is only interesting if you actually want to cache the request, so you don’t need to specify it at all. The Cache-Control is per the HTTP 1.1 spec for clients and proxies (and implicitly required by some clients next to Expires). The Pragma is per the HTTP 1.0 spec for prehistoric clients.

Intermediate cache servers compatible with HTTP 1.1 will obey the same no-cache and must-revalidate instructions as browser caches will. After redirecting on ActionFilterAttribute event the consequences of clearing all headers are losing all session data and data in TempData storage. It’s safer to redirect from an Action or don’t clear headers when redirection is taking place. It will only apply to the index files and not other files you still might want to be cached. This may also come in handy if your dynamic files e.g. php, etc. are being cached by the browser, and you can’t figure out why. On a more positive note, policies regarding physical access to computers, software installation, and the like will put you miles ahead of most firms in terms of security.

Does Chrome work on my operating system?

Originally we used no-cache many years ago and did run into some problems with stale content with certain browsers… There are different methods and if not specified, will use default. General differences between browser history and the normal HTTP caching are described in a specific sub-section of the spec. History buffers MAY store such responses as part of their normal operation. I must clarify that no-cache does not mean do not cache. In fact, it means “revalidate with server” before using any cached response you may have, on every request.

• The reason being some Docker commands can take a long time (perhaps several minutes?) to run.
• In particular, I noticed that none of them would stop IE8 from using a cached version of the page when you accessed it by hitting the back button.
• So now anything related to the docker is gone and docker cache is completely deleted , like you have a fresh docker installation .
• Caching headers are unreliable in meta elements; for one,any web proxies between the site and the user will completely ignorethem.
• I was having the opposite problem – RUN directives were not being cached when I really needed them to.

Frequently asked questions

They include directives to declare what should be cacheable, what may be stored by caches, modifications of the expiration mechanism, and revalidation and reload controls. Additionally, jQuery and other client frameworks will attempt to trick the browser into not using its cached version of a resource by adding stuff to the url, like a timestamp or GUID. This is effective in making the browser ask for the resource again but doesn’t really prevent caching. Also no-store technically means must not store to any non-volatile storage (disk) and release it from volatile storage (memory) ASAP. A client request with no-store shouldn’t write to disk or database and is meant to transient.

• So far, I haven’t found any set of headers that will cause those browsers to not return cached versions of pages when you hit the back button.
• You should always use a real HTTP header for headers such asCache-Control and Pragma.
• Also, just for good measure, make sure you reset the ExpiresDefault in your .htaccess file if you’re using that to enable caching.
• After redirecting on ActionFilterAttribute event the consequences of clearing all headers are losing all session data and data in TempData storage.
• For chrome, no-cache is used to reload the page on a re-visit, but it still caches it if you go back in history (back button).

There’s always an option to insert some meaningless and cheap-to-run command before the region you want to disable cache for. So, answering the question, using only one of them is enough.Also, some (not very) recent works prove that browsers are more Cache-Control compatible nowadays. Have never looked back or had a single issue with stale content by any browser or intermediaries since.

If the server says that the resource is still valid then the cache can respond with its representation, thus alleviating the need for the server to resend the entire resource. I’m told to prevent user-info leaking, only “no-cache” in response is not enough. You can use nocache Middleware to turn off caching. Also, just for good measure, make sure you reset the ExpiresDefault in your .htaccess file if you’re using that to enable caching. On the other hand, if the server auto-includes a valid Date header, then you could theoretically omit Cache-Control too and rely on Expires only.

This is of course not a direct answer to the question, but might save some lives… To install Chrome, simply download the installation file, then look for it in your downloads folder. Once Chrome is installed, you can delete the install file. Gemini in Chrome is your personal AI assistant, helping you easily understand content on the web and get tedious tasks done using the context of your open tabs and browsing history.