func ServeTestHTTP(conn *http.Conn, req *http.Request) {
	req.Close = true
	if api_key, ok := req.Header["Authorization"]; !ok || api_key != API_KEY {
		text := []byte(ERROR_CODES[http.StatusUnauthorized])
		conn.SetHeader("Content-Type", "text/html;charset=ISO-8859-1")
		conn.SetHeader("Cache-Control", "must-revalidate,no-cache,no-store")
		conn.SetHeader("Content-Length", strconv.Itoa(len(text)))
		conn.WriteHeader(http.StatusUnauthorized)
		conn.Write(text)
		conn.Flush()
		return
	}
	if text, ok := URL_MAPPINGS[req.URL.Path]; ok {
		conn.SetHeader("Content-Type", "application/xml;charset=UTF-8")
		conn.SetHeader("Transfer-Encoding", "chunked")
		// for some reason, api.rapleaf.com does not send Content-Length
		// when sending stored data
		conn.WriteHeader(http.StatusOK)
		conn.Write([]byte(text))
		conn.Flush()
		return
	}
	text := []byte(ERROR_CODES[http.StatusNotFound])
	conn.SetHeader("Content-Type", "text/html;charset=ISO-8859-1")
	conn.SetHeader("Cache-Control", "must-revalidate,no-cache,no-store")
	conn.SetHeader("Content-Length", strconv.Itoa(len(text)))
	conn.WriteHeader(http.StatusNotFound)
	conn.Write(text)
	conn.Flush()
	return
}