How do I programmatically set gzip in Jetty?

clojure, embedded-jetty, jetty

Solution

In a Compojure app I'm working on, I have a Ring/Jetty adapter based on ring-jetty-adapter which programmatically configures Jetty to use a GzipHandler to gzip content dynamically.

(defn- configurator [server ring-handler]
  (.setHandler server
               (doto (new HandlerCollection)
                     (.addHandler (doto (new GzipHandler)
                       (.setHandler (proxy-handler ring-handler))
                       (.setMimeTypes "text/html,text/plain,text/xml,application/xhtml+xml,text/css,application/javascript,text/javascript,image/svg+xml")))
                     (.addHandler (doto (new RequestLogHandler) (.setRequestLog (NCSARequestLog.)))))))

This function takes a Server instance and my Ring handler and sets it up with some handlers. Note that the `GzipHandler` is a `HandlerWrapper`, so it takes my (proxied) Ring handler and delegates to it. I also add a logging handler which will be executed after the (gzip-wrapped) Ring handler.

Check out the complete working version.

Problem

I'm writing a web app using Noir and clojure, which uses Jetty. Jetty has two ways of using gzip, one for static, and one for dynamic, they are described in https://stackoverflow.com/a/9113129/104021. I want to turn on both static and dynamic gzipping, but our project doesn't use web.xml files, and doesn't want to start. How do I programmatically set jetty to use gzip (ie without having a web.xml)?

Original source