Golang : How to Set or Add Header http.ResponseWriter?
Problem :
How to set or add header to http.ResponseWriter?
Solution :
The solution is similar to previous tutorial on how to set or add header to HTTP Request. All you need to do is to use the Add() or Set() methods in the http.ResponseWriter.Header() function. (http://golang.org/pkg/net/http/#ResponseWriter)
For example :
package main
import (
"net/http"
"strings"
)
func SayHelloWorld(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello, World!"))
}
func ReplyName(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*") //<---------- here!
URISegments := strings.Split(r.URL.Path, "/")
w.Write([]byte(URISegments[1]))
}
func main() {
// http.Handler
mux := http.NewServeMux()
mux.HandleFunc("/", SayHelloWorld)
mux.HandleFunc("/replyname", ReplyName)
http.ListenAndServe(":8080", mux)
}
See also : Golang : Set or Add HTTP Request Headers
By Adam Ng
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