internal/util/cors.go

// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
// or more contributor license agreements. Licensed under the Elastic License 2.0;
// you may not use this file except in compliance with the Elastic License 2.0.

package util

import (
	"net/http"

	"github.com/gorilla/mux"
)

// CORSMiddleware is a middleware used to add CORS related headers.
func CORSMiddleware() mux.MiddlewareFunc {
	return func(next http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			w.Header().Set("Access-Control-Allow-Origin", "*")
			next.ServeHTTP(w, r)
		})
	}
}