public static Result httpGet(String requestUrl, Map<String, String> headers);
public static Result httpPost(String requestUrl, Map<String, Object> body,
Map<String, String> headers);
public static Result httpPut(String requestUrl, Map<String, Object> body,
Map<String, String> headers);
public static Result httpDelete(String requestUrl, Map<String, Object> body,
Map<String, String> headers);