reverseproxy

type HTTPHandler struct {
	// required, the URL that requests will be forwarding to
	To *url.URL

	// required, internal reverse proxy that forwards the requests
	ReverseProxy *httputil.ReverseProxy

	// optional, preserve the host in outbound requests
	PreserveHost bool

	// optional, but in fact required, injecting fingerprint headers to outbound requests
	HeaderInjectors []HeaderInjector

	// optional, if IsProbeRequest returns true, handler will respond with
	// a HTTP 200 OK instead of forwarding requests, useful for kubernetes
	// liveness/readiness probes. defaults to nil, which disables this behavior
	IsProbeRequest func(*http.Request) bool
}

type HeaderInjector interface {
	GetHeaderName() string

	GetHeaderValue(req *http.Request) (string, error)
}