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package 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)
}
}
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