Serving gzipped content for Go

Question

I\'m starting to write server-side applications in Go. I\'d like to use the Accept-Encoding request header to determine whether to compress the response entity usi

Answer 1

There is yet another "out of the box" middleware now, supporting net/http and Gin:

https://github.com/nanmu42/gzip

net/http example:

import github.com/nanmu42/gzip

func main() {
    mux := http.NewServeMux()
    mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        writeString(w, fmt.Sprintf("This content is compressed: l%sng!", strings.Repeat("o", 1000)))
    })

    // wrap http.Handler using default settings
    log.Println(http.ListenAndServe(fmt.Sprintf(":%d", 3001), gzip.DefaultHandler().WrapHandler(mux)))
}

func writeString(w http.ResponseWriter, payload string) {
    w.Header().Set("Content-Type", "text/plain; charset=utf8")
    _, _ = io.WriteString(w, payload+"\n")
}

Gin example:

import github.com/nanmu42/gzip

func main() {
    g := gin.Default()

    // use default settings
    g.Use(gzip.DefaultHandler().Gin)

    g.GET("/", func(c *gin.Context) {
        c.JSON(http.StatusOK, map[string]interface{}{
            "code": 0,
            "msg":  "hello",
            "data": fmt.Sprintf("l%sng!", strings.Repeat("o", 1000)),
        })
    })

    log.Println(g.Run(fmt.Sprintf(":%d", 3000)))
}