force download

main.go

package main

import (
	"fmt"
	"io"
	"net/http"
)

func serve(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/octet-stream")
	w.Header().Set("Content-Transfer-Encoding", "Binary")
	w.Header().Set("Content-disposition", "attachment; filename=\"whatever.json\"")
	_, err := io.WriteString(w, "{\"name\": \"Patrick Nindyatama\"}")
	if err != nil {
		fmt.Println(err)
	}
}

func main() {
	forever := make(chan bool)
	http.HandleFunc("/", serve)
	go http.ListenAndServe(":8080", nil)
	<-forever
}

How to use:

• Run go run main.go
• Open http://localhost:8080
• Expect to download whatever.json