http-caching

问题 I am making a transition from SOAP to REST, and I would like to convince my colleagues that this is a good move. We don't need the extra security mechanisms that SOAP can provide. For us the overhead of SOAP and WSDL has only proven to be a headache over the years. Apart from the obvious simplifications, one really valuable advantage for our system would be the HTTP caching mechanisms. I have read things on the subject, but I still don't fully understand why these caching mechanisms can't be

问题 If a HTTP response that returns both Expires and max-age indications which one is used? Cache-Control: max-age=3600 Expires: Tue, 15 May 2008 07:19:00 GMT Considering that each one refers to a different point in time. 回答1: See this answer: Difference between three .htaccess expire rules If a response includes both an Expires header and a max-age directive, the max-age directive overrides the Expires header , even if the Expires header is more restrictive. This rule allows an origin server to

问题 If a HTTP response that returns both Expires and max-age indications which one is used? Cache-Control: max-age=3600 Expires: Tue, 15 May 2008 07:19:00 GMT Considering that each one refers to a different point in time. 回答1: See this answer: Difference between three .htaccess expire rules If a response includes both an Expires header and a max-age directive, the max-age directive overrides the Expires header , even if the Expires header is more restrictive. This rule allows an origin server to

问题 I use retrofit and okhttp in one of our applications. I can't really find a good explanation for the default behaviour of Retrofit. If Okhttp is on the class path it will be automatically used. But as far as I can see it the default HttpResponseCache is null. Do I need to explicitly enable caching with Retrofit and Okhttp? 回答1: You should manually create your OkHttpClient and configure it how you like. In this case you should install a cache. Once you have that create an OkClient and pass it

问题 i have this code here on a page: <!-- no cache headers --> <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /> <meta http-equiv="Pragma" content="no-cache" /> <meta http-equiv="Expires" content="0" /> <!-- end no cache headers --> when i go to other page and hit back button of browser (back to the page where this code written), it is still had the cache state of the page. option is, to add PhaseListener but they told me that adding PhaseListener is an additional

问题 I was using WebPageTest to test the performance of my Azure Web App (ASP.Net vNext Web API/Angular). I got an F for both "Compress Transfer" and "Cache Static Content". After searching StackOverflow and Google, I added the following to my web.config: <urlCompression doStaticCompression="true" doDynamicCompression="true" /> <httpCompression> <dynamicTypes> <clear /> <remove mimeType="*/*" /> <add enabled="true" mimeType="text/*"/> <add enabled="true" mimeType="message/*"/> <add enabled="true"

问题 With very simple caching semantics: if the parameters are the same (and the URL is the same, of course), then it's a hit. Is that possible? Recommended? 回答1: The corresponding RFC 2616 in section 9.5 (POST) allows the caching of the response to a POST message, if you use the appropriate headers. Responses to this method are not cacheable, unless the response includes appropriate Cache-Control or Expires header fields. However, the 303 (See Other) response can be used to direct the user agent

问题 I recently added the crossorigin attribute to certain script tags to enable my scripts to gather error information from scripts from a different subdomain. I added the header in nginx to allow the cross-origin request. Since then, I occasionally have a page load without the browser requesting certain javascript files from the server. Reloading the page resolves the issue, but this has happened several times now. I think this is related to CORS, but since it works most of the time, I have no

问题 What currently are React Native's default behaviors for caching in fetch calls? The official FB guides simply say "look at Mozilla!" but we're not on a web browser. I would assume cache behavior is custom here as result of the middleware. Let's say I do: fetch("https://exampleserver.com/myfile.json") Are requests automatically cached once called? Is the request contents of myfile.json cached the entire "session" (ie: App is running active/bg, but not forced closed by user). Where is the

问题 When I add the line WL.Client.addGlobalHeader("MyCustomHeader","abcdefgh"); inside of my main js file like so function wlCommonInit(){ WL.Client.addGlobalHeader("MyCustomHeader","abcdefgh"); (...) like it's described in the documentation (http://pic.dhe.ibm.com/infocenter/wrklight/v5r0m5/topic/com.ibm.worklight.help.doc/apiref/r_wl_client_addglobalheader.html) this has absolutely no effect all request send after that: GET /apps/services/preview/MobileOPMClient/common/0/default/images/icons