Web API响应中的默认HTTP标头

Question

Im attempting to set a default header in my Golang web api. I am using the net/http router that comes with Go. I can find many examples of how to do this :

• Using some other routers.
• Doing it for every response ( I am already doing it )

Is it there a way in which I can set a default header for all responses using net/http?

Answer 1

Create a wrapper function. Something like:

package main

import "net/http"

func SetDefaultHeaders(handler func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
    return func(w http.ResponseWriter, r *http.Request) {
        // Set default headers
        handler(w, r)
    }
}

func main() {
    http.HandleFunc("/", SetDefaultHeaders(func(w http.ResponseWriter, r *http.Request) {
        // ...
    }))
}