httpgzip

httpgzip is a Go package that provides an http.Handle wrapper that transparently compresses the response payload with gzip if the Accept-Encoding: gzip request header is provided. It sets the Vary: Accept-Encoding and Content-Encoding: gzip response headers.

API

mux := http.NewServeMux()
mux.Handle("/", IndexHandler)
mux.Handle("/login", LoginHandler)

http.ListenAndServe(":8000", httpgzip.Handler(mux))

That's it. But it's also on godoc.

Without gzip:

$ curl -v http://localhost:8080/

> GET / HTTP/1.1
> User-Agent: curl/7.30.0
> Host: localhost:8000
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: text/plain; charset=utf-8
< Date: Tue, 22 Jul 2014 19:16:20 GMT
< Content-Length: 446
<
Lorem ipsum dolor sit amet, consectetur adipisicing
elit, sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.

With gzip:

$ curl --compress -v http://localhost:8080/

> GET / HTTP/1.1
> User-Agent: curl/7.30.0
> Host: localhost:8000
> Accept: */*
> Accept-Encoding: deflate, gzip
>
< HTTP/1.1 200 OK
< Content-Encoding: gzip
< Content-Type: text/plain; charset=utf-8
< Vary: Accept-Encoding
< Date: Tue, 22 Jul 2014 19:17:41 GMT
< Content-Length: 292
<
Lorem ipsum dolor sit amet, consectetur adipisicing
elit, sed do eiusmod tempor incididunt ut labore et dolore magna
aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor
in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla
pariatur. Excepteur sint occaecat cupidatat non proident, sunt in
culpa qui officia deserunt mollit anim id est laborum.