I'm starting to write server-side applications in Go. I'd like to use the Accept-Encoding request header to determine whether to GZIP the response entity. I had hoped to find a way to do this directly using the http.Serve or http.ServeFile methods.
This is quite a general requirement; did I miss something or do I need to roll my own solution?
There is no “out of the box” support for gzip-compressed HTTP responses yet. But adding it is pretty trivial. Have a look at
https://gist.github.com/the42/1956518
also
https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/cgUp8_ATNtc
The New York Times have released their gzip middleware package for Go.
You just pass your http.HandlerFunc
through their GzipHandler
and you're done. It looks like this:
package main
import (
"io"
"net/http"
"github.com/nytimes/gziphandler"
)
func main() {
withoutGz := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
io.WriteString(w, "Hello, World")
})
withGz := gziphandler.GzipHandler(withoutGz)
http.Handle("/", withGz)
http.ListenAndServe("0.0.0.0:8000", nil)
}