h.printf("cgi: no headers")
		return
	}

	if loc := headers.Get("Location"); loc != "" {
		if strings.HasPrefix(loc, "/") && h.PathLocationHandler != nil {
			h.handleInternalRedirect(rw, req, loc)
			return
		}
		if statusCode == 0 {
			statusCode = http.StatusFound
		}
	}

	if statusCode == 0 && headers.Get("Content-Type") == "" {