package middleware // import "github.com/docker/docker/api/server/middleware"

import (

"context"

"net/http"

)

// ExperimentalMiddleware is a the middleware in charge of adding the

// 'Docker-Experimental' header to every outgoing request

type ExperimentalMiddleware struct {

experimental string

}

// NewExperimentalMiddleware creates a new ExperimentalMiddleware

func NewExperimentalMiddleware(experimentalEnabled bool) ExperimentalMiddleware {

if experimentalEnabled {

return ExperimentalMiddleware{"true"}

}

return ExperimentalMiddleware{"false"}

}

// WrapHandler returns a new handler function wrapping the previous one in the request chain.

func (e ExperimentalMiddleware) WrapHandler(handler func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error) func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {

return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {

w.Header().Set("Docker-Experimental", e.experimental)

return handler(ctx, w, r, vars)

}

}