# URL 重写

Surge 可以使用 2 种不同的方法重写请求的 URL，或者根据 URL 拒绝某些请求。

示例：

```ini
[URL Rewrite]
^http://www\.google\.cn http://www.google.com header
^http://yachen\.com https://yach.me 302
^http://ad\.com/ad\.png _ reject
```

重写规则由三个部分组成：正则表达式、替换内容和类型。

### Header 模式

Surge 会修改请求头，并在必要时将请求重定向到另一个主机。客户端不会感知到这个重写操作。

请求头中的 `Host` 字段将被修改以匹配新的 URL。

```ini
[URL Rewrite]
^http://www\.google\.cn http://www.google.com header
```

### 302 模式

Surge 将直接返回一个 302 重定向响应。如果为主机名启用了 MitM，HTTPS 请求也可以被重定向。

```ini
[URL Rewrite]
^http://yachen\.com https://yach.me 302
```

### Reject 模式

如果模式匹配，则拒绝该请求。替换参数将被忽略。如果为主机名启用了 MitM，HTTPS 请求将被拒绝。

```ini
[URL Rewrite]
^http://ad\.com/ad\.png _ reject
```


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# 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/http-processing/url-rewrite.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.