http-caching

问题 As far as I know, the HTTP Header Vary specifies a comma separated list of HTTP headers that need to be considered by caches together with the URL when deciding if a request is a cache hit or miss. If that header is omitted, means that only the URL will be considered. But what happen when the header is Vary:* ? RFC 2616 14.4 A Vary field value of *** signals that unspecified parameters not limited to the request-headers (e.g., the network address of the client), play a role in the selection

问题 Let's say i have a web/mobile app running firebase firestore database. My app is set to serve mostly dynamic content fully stored in firestore. So we are talking about caching dynamic content If a user load Page A, it's will make 1 request to firestore (for example). If this user go to Page B and then go back to Page A 5 minutes later, i don't want the app to make another request if the content has not changed. I heard about http cache-control headers but my concern is. If the cache control

问题 I don't find get the practical difference between Cache-Control:no-store and Cache-Control:no-cache . As far as I know, no-store means that no cache device is allowed to cache that response. In the other hand, no-cache means that no cache device is allowed to serve a cached response without validate it first with the source. But what is that validation about? Conditional get? What if a response has no-cache , but it has no Last-Modified or ETag ? Regards. 回答1: But what is that check about?

问题 I created a new solution from WebApi .Net Core 2.0 template in Visual Studio. I added the following in startup. public void ConfigureServices(IServiceCollection services) { services.AddMvc(); services.AddHttpCacheHeaders(opt => opt.MaxAge = 600); services.AddResponseCaching(); } public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); } app.UseResponseCaching(); app.UseHttpCacheHeaders(); app.UseMvc(); } Then, with

问题 I have wrote a stateless EJB that provides a rest service. I am working with the Wildfly 10 application server and developing with the Netbeans IDE. I have tried to cache the return values of few methods for few hours by adding a max-age header in the http-response of the service methods. Please consider this is a simplified version of my bean: @Stateless @DeclareRoles({"role1","role2"}) @RolesAllowed({"role1","role2"}) @Path("api-dummy") public class DummyApiREST { @EJB private StuffFacade

问题 As a part of our refactoring and move to WebApi 2, we are thinking of caching our responses. Based on my research OOB only the Get & Head are supported, however all our controllers only expose POST methods, are there are custom libraries or articles that can help us with implementing caching for POST actions ? 来源： https://stackoverflow.com/questions/30596582/webapi-caching-for-http-post

问题 I have a writing a web based application with a custom web server and I'm having problems with the webkit browsers not caching images, stylesheets and javascript. I have tracked it down to some relationship between Cache-Control: max-age and Last-Modified. If both are specified then webkit seems to ignore the max-age header and check if the file has been modified EVERY time the resource is used. The site has an iframe on the first page and it results in stylesheets, etc. being requested twice

问题 We are trying to enable HTTP compression (gzip) and HTTP 304 Caching via ETags on Azure CDN. We already discovered an issue with enabling Azure CDN Compression, but now we can't get compression and ETag caching (304s) working simultaneously. This issue has been posted to Azure forums here. Here is an example of the compressed, but not HTTP cacheable (304) link: https://xxxx.vo.msecnd.net/resourceManager.axd?token=HL80vX5hf3lIAAA&group=core.js Here is an example of the cacheable (304), but not

问题 Given a response from a web server that contains an Authorization header as per the OAuth spec does HTTP caching fail to be useful? Request1 Authorization : AUTHTOKEN Request2 Authorization : ANOTHERAUTOTOKEN In this case given HTTP caching the second request would return the cached response for the first user. This isn't a problem for content that is generic across users, but this feels wrong for a shared cache to be providing responses for other users. Likewise if we were to use a Vary

问题 I am a web developer, have worked with PHP and .NET both. having over a year of experience working on web I haven't been able to understand the browser caching features thoroughly, I hope Web Gurus here can help me with it. Questions I have in my mind are: How does browser actually caches stuff, does it request for to see if the cached file has changed on the server or not, What is the Ideal way for a developer to make use of browser caching to its full, but also to be able to push new