apex/up

// Package robots provides a way of dealing with robots exclusion protocol
package robots

import (
    "net/http"
    "os"

    "github.com/apex/up"
)

// New robots middleware.
func New(c *up.Config, next http.Handler) http.Handler {
    if os.Getenv("UP_STAGE") == "production" {
        return next
    }

    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.Header().Set("X-Robots-Tag", "none")
        next.ServeHTTP(w, r)
    })
}