發現
請求包隨意，響應包信息如下：
HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Server: Microsoft-IIS/7.5
X-AspNetMvc-Version: 5.2
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Fri, 17 Apr 2020 03:09:15 GMT
Connection: close
Content-Length: 43251
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
...
特征：
# 響應頭有這4個字段
Server: Microsoft-IIS/7.5
X-AspNetMvc-Version: 5.2
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
關閉options方案
關閉options得根據服務器使用的WEB容器種類來決定方法，下面列舉主流的。