# HTTP 规则

共有两种 HTTP 规则类型。HTTP 规则适用于 HTTP 请求或 HTTPS 请求。它不会影响 TCP 连接。

#### USER-AGENT

```ini
USER-AGENT,Instagram*,DIRECT
```

如果请求的 User-Agent 匹配，则触发该规则。支持通配符 `*` 和 `?`。

#### URL-REGEX

`URL-REGEX,^http://google\.com,DIRECT`

如果 URL 匹配该正则表达式，则触发该规则。

你可以追加 `extended-matching` 参数以同时测试 HTTP Host 请求头（或 `:authority`）和 SNI，这在需要 TLS 握手信息时非常有用：

```ini
URL-REGEX,^https://example\.com,Proxy,extended-matching
```


---

# 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://surge.mitsea.com/rule/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.