Embed http.ResponseWriter but retain Pusher/Flusher/Hijacker functionality

<p>What would be a strategy to intercept writes to a http.ResponseWriter but keep all functionality of the original response writer? An example would be middleware that e.g. gzips or minifies any writes to a response writer. A contrived example would be: <a href="https://play.golang.org/p/PZxxLaWu5W" rel="nofollow">https://play.golang.org/p/PZxxLaWu5W</a></p> <p>Is there a way to expose the hijacker functionality of the original responsewriter from the middleware responsewriter?</p> <hr/>**评论：**<br/><br/>mwholt: <pre><p>That is essentially how Caddy does it. <a href="https://github.com/mholt/caddy/blob/696792781a5a8e9c70959b6c2de414d2700257e5/caddyhttp/gzip/gzip.go#L105-L163" rel="nofollow">https://github.com/mholt/caddy/blob/696792781a5a8e9c70959b6c2de414d2700257e5/caddyhttp/gzip/gzip.go#L105-L163</a></p> <p>Although I&#39;m not thrilled with it either. :-/</p></pre>gohacker: <pre><p><a href="https://play.golang.org/p/r3JR1lkaag" rel="nofollow">https://play.golang.org/p/r3JR1lkaag</a></p></pre>manoharank: <pre><p><a href="https://godoc.org/github.com/felixge/httpsnoop#Wrap" rel="nofollow">https://godoc.org/github.com/felixge/httpsnoop#Wrap</a></p></pre>