September 12, 2012 09:30AM
I am running a few webapps on Tomcat, and placing nginx in front for
SSL, content caching and to remove some of the load from Tomcat where
possible (currently testing v1.2.3 on CentOS 6.x).

I have most of the configuration working well (nginx is very slick, and
pretty easy to configure). However, I have some static content like swf
(flash) files that are served to the client browser with parameters, and
I think this is why nginx is not caching them. For example,
".../testflash.swf?dt=0123456789" (dt is typically a timestamp, but is
a unique identifier, nonetheless). Since this swf file does not
actually change (incredibly rarely, in a major "upgrade", and I would
purge the cache at that point), is there a way to tell nginx to cache it
regardless of the url-parameters appended?

These files, and most of the other content, have ETag's and
Last-Modified-Date (both). In this case there is no explicit
Cache-Control in the header.

Related question: If content has an ETag from the source server (the
content that nginx fetches already has an ETag), is there a way to force
nginx to cache the content based on that ETag? I _think_ this is
different to the ETag support that is coming in the > 1.3.3 versions, as
that seems to say that it will actually add tags for content. In this
case, I would've expected nginx to cache any content with an ETag and
especially with a Last-Modified-Date when no explicit Cache-Control
header was provided.

Thanks for dealing with my newbie questions, I appreciate your time.
-AJ

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Subject Author Posted

NEWBIE: cache swf content?

aweber September 12, 2012 09:30AM



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