# Http

后面看burp发现历史记录加载了一个Secret.php文件：

重新审计源码发现页面引入了Secret.php。访问该文件，修改HTTP保头的：

* User-Agent
* X-Forwarded-For
* referer

三个属性，读取flag。

```
GET /Secret.php HTTP/1.1
Host: node3.buuoj.cn:26881
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Syclover/86.0.4240.111 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: zh,zh-TW;q=0.9,en-US;q=0.8,en;q=0.7,zh-CN;q=0.6
Connection: close
referer: https://www.Sycsecret.com
X-Forwarded-For: 127.0.0.1
Content-Length: 2
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://gitbook-88.gitbook.io/ctf-writeup/2019/2019-ji-ke-da-tiao-zhan/http.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.