Add HTTPRequest getPath

**Is your feature request related to a problem? Please describe.**
Currently it's not possible to retrieve the path of a request in an interceptor. This could be useful for filtering or logging

**Describe the solution you'd like**
Add getPath() to HTTPRequest

首先定位 HTTPRequest 类，并检查 interceptor 如何访问 request 数据。添加所请求的 getPath() 入口，使 interceptor 能够获取 request path 以进行过滤或日志记录。当 HTTPRequest 按描述暴露 path，且项目现有检查仍然通过时，即表示完成。

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