Function RedirectHandler

core/host/proxy.go:185–205

RedirectHandler returns a simple redirect handler. See `NewProxy` or `ProxyHandler` for more features.

(target *url.URL, redirectStatus int)

// RedirectHandler returns a simple redirect handler.
// See `NewProxy` or `ProxyHandler` for more features.
func RedirectHandler(target *url.URL, redirectStatus int) http.Handler {
	targetURI := target.String()
	if redirectStatus <= 300 {
		// here we should use StatusPermanentRedirect but
		// that may result on unexpected behavior
		// for end-developers who might change their minds
		// after a while, so keep status temporary.
		// Note thatwe could also use StatusFound
		// as we do on the `Context#Redirect`.
		// It will also help us to prevent any post data issues.
		redirectStatus = http.StatusTemporaryRedirect
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		redirectTo := path.Join(targetURI, r.URL.Path)
		if len(r.URL.RawQuery) > 0 {
			redirectTo += "?" + r.URL.RawQuery
		}
		http.Redirect(w, r, redirectTo, redirectStatus)
	})
}