With no-store, if the user ends his session by navigating to another domain and then goes back, the only way for browser to know what to display is to get the initial page again from the server. However, cacheing headers are unreliable in meta elements; for one, any web proxies between the site and the user will completely ignore them. You should always use a real HTTP header for headers such as Cache-Control and Pragma.
No-store should not be necessary in normal situations, and in some cases can harm speed and usability. Sample code in Python using web.py web.header calls follows. I purposefully redacted my personal irrelevant utility code.
Your Answer
I have not been able to prove this, but I’m concerned that my data may be getting cached. 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. As @Kornel stated, what you want is not to deactivate the cache, but to deactivate the history buffer. Different browsers have their own subtle ways to disable the history buffer. The no-store header, on the other hand, prevents the data from being stored outside of a session, in which case it simply isn’t available for a history mechanism to use.
I’m told to prevent user-info leaking, only «no-cache» in response is not enough. 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. Also, just for good measure, make sure you reset the ExpiresDefault in your .htaccess file if you’re using that to enable caching. 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.
Until you do so, your browser will keep the old cached version, and won’t refresh it with a «normal refresh» (F5). 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. In the old HTTP spec, the wording was even stronger, explicitly telling browsers to disregard cache directives for back button history.
Add Cache-Control Headers
It looks dirty, but as far as I know it’s the most efficient way to continue benefiting from the cache system of Docker, which saves time when you have many layers… In most of cases, these 3 things are perfectly enough to allow a clean build of our image.So we should try to stick to that. This is of course not a direct answer to the question, but might save some lives… Alright, this is due to the pain that godaddy gives me by implementing their own caching in a MANAGED WORDPRESS hosting.
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.
No cache in Node.js server
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. This goes in your root .htaccess file but if you have access to httpd.conf that is better. This code uses the FilesMatch directive and the Header directive to add Cache-Control Headers to certain files. Public – may be cached in public shared caches.Private – may only be cached in private cache.No-Cache – may not be cached.No-Store – may be cached but not archived.
Adding ?nocache=1 to every url (including the assets like stylesheet) behind the scenes using mod rewrite
Originally we used no-cache many years ago and did run into some problems with stale content with certain browsers… There are times when you may want to mix methods even on the same resource based on context. For example, you may want to use reload on a service worker and background sync, but use default for the web page itself. This is where you can manipulate the user agent (browser) cache to your liking.
In HTTP 1.1, the Cache-Control takes precedence over Expires, so it’s after all for HTTP 1.0 proxies only. Our investigations have shown us that not all browsers respect the HTTP cache directives in a uniform manner. Using that super delete command may not be enough because it strongly depends on the state of containers (running or not). The list is just examples of different techniques, it’s not for directinsertion. If copied, the second would overwrite the first and thefourth would overwrite the third because of the http-equivdeclarations AND fail with the W3C validator.
If the consumers of this information are members of the public, the only thing you can really do is help them understand that once the information hits their machine, that machine is their responsibility, not yours. The freshness model https://forex-review.net/okcoin-review/ (Section 4.2) does not necessarily apply to history mechanisms. That is, a history mechanism can display a previous representation even if it has expired. 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.
- Also look into their offical docs for more ways to invalidate docker cache.
- No-store should not be necessary in normal situations, and in some cases can harm speed and usability.
- Our expertise are MANICURES, PEDICURES, DIPPING, ACRYLIC, SNS, FACIAL, WAXING, EYELASHES and more…
- At the very least, there is no guarantee that any routers, proxies, etc. will not ignore the caching directives as well.
HTML meta tags vs HTTP response headers
At most, one could haveone of each http-equiv declarations; pragma, cache-control andexpires. These are completely outdated when using modern up to date browsers.After IE9 anyway. Chrome and Firefox specifically does not work with these as you would expect, if at all. I really hope this helps someone who reads this far down. 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.
Also look into their offical docs for more ways to invalidate docker cache. 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.
- In addition to the headers consider serving your page via https.
- Any combination of client, or server can dictate what method, or set of methods, to use.
- By contrast, no-store says to not even keep a copy, which means there’s nothing to ask about.
- 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.
This is effective in making the browser ask for the resource again but doesn’t really prevent caching. Generally, you’d better just not specify the HTML meta tags to avoid confusion by starters and rely on hard HTTP response headers. Only the http-equiv values listed in HTML5 specification are allowed.
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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. 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. 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.
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. I have a few RUN commands in my Dockerfile that I would like to run with -no-cache each time I build a Docker image.