Method CopyTo

context/response_writer.go:315–330

CopyTo writes a response writer (temp: status code, headers and body) to another response writer.

(to ResponseWriter)

// CopyTo writes a response writer (temp: status code, headers and body) to another response writer.
func (w *responseWriter) CopyTo(to ResponseWriter) {
	// set the status code, failure status code are first class
	if w.statusCode >= 400 {
		to.WriteHeader(w.statusCode)
	}

	// append the headers
	for k, values := range w.Header() {
		for _, v := range values {
			if to.Header().Get(v) == "" {
				to.Header().Add(k, v)
			}
		}
	}
	// the body is not copied, this writer doesn't support recording
}

// ErrHijackNotSupported is returned by the Hijack method to
// indicate that Hijack feature is not available.