go：代碼
import (
"net/http"
"encoding/json"
)
func main() {
http.HandleFunc("/down",downloadFile)
http.ListenAndServe("127.0.0.1:8080",nil)
}
type User struct {
Name string `json:"name"`
Id int64 `json:"id"`
}
func downloadFile(res http.ResponseWriter, req *http.Request) {
user := User{
Name : "admin",
Id : 1,
}
userJson,_ := json.Marshal(user)
userString := string(userJson)
d := []byte(userString)
res.Header().Add("content-type","application/octet-stream;charset=utf-8")
res.Header().Add("content-Disposition","filename=fileName")
res.Write([]byte("this is title"))
res.Write(d)
}
