"Caldarale, Charles R" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >> From: David Smith [mailto:[EMAIL PROTECTED] >> Subject: Tomcat caching of static resources? >> >> is it possible to cache static images and .js files in Tomcat? > >Think about what you just asked for: how would caching static resources in >the server avoid them being downloaded by >the browser? It's the browser >that must cache the information to avoid the redundant downloads. > There are settings in Tomcat that control server-side caching of static resources (i.e. Tomcat serves up an in-memory copy of frequently requested static resources). I really can't recommend this for "large .js files" on a production server however. If you must do this, check out the Tomcat docs for configuring a <Resources .../> element. However, the OP is probably better off enabling the sendfile options on either the NIO or APR Connector.
>> When i look at the browser cache it looks like the browser >> is downloading all page assets for every call, including some >> very large .js files. > >As stated in one of the (correct) responses to the article you referenced: > >"So the first thing is to get control of the cache headers. Without them, >the cache can not know what to do." > >What are you doing to control the headers? What headers are being used for >the large .js files? > The article is referring to the fact that Tomcat adds cache headers by default to any page protected by a <security-constraint> to prevent someone else from stealing it from an intermediate proxy. The default settings are extremely aggressive, resulting in regular posts on this list of the form "My secured pdf file can't be displayed in IE". If the article applies to the OP, it may just be easier to move the .js files to a non-secured location. If you take the advice in the article, then you are telling Tomcat that the webapp programmer is taking full control of the cache headers, so you are on your own in terms of security. >> but the solution didn't resolve the problem (especially if >> deploying via war files) > >The original author of the article is clearly unfamiliar with Tomcat, >caching, and security (e.g., not knowing where a >context.xml file goes, >and erroneously stating it doesn't work with a .war file). > >> i cant believe there isn't a standard Tomcat configuration for this? > >For what? Caching static resources on the server end doesn't alter the >amount of network traffic generated. > >- Chuck > > >THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY >MATERIAL and is >thus for use only by the intended recipient. If you >received this in error, please contact the sender and delete the e->mail >and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
