package middleware

import (
	"context"
	"net/http"
)

// WithValue set k/v in a context chain.
func WithValue(k, v interface{}) func(next http.Handler) http.Handler {
	return func(next http.Handler) http.Handler {
		f := func(w http.ResponseWriter, r *http.Request) {
			r = r.WithContext(context.WithValue(r.Context(), k, v))
			next.ServeHTTP(w, r)
		}
		return http.HandlerFunc(f)
	}
}