# Page Not Found

The URL `chapter-08-design-a-url-shortener` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [第08章：短网址设计](https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-08-design-a-url-shortener.md)
- [第09章：网络爬虫设计](https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-09-design-a-web-crawler.md)
- [第04章：设计一个限流器](https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-04-design-a-rate-limiter.md)
- [第12章：设计一个聊天系统](https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-12-design-a-chat-system.md)
- [第06章：key-value 存储设计](https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-06-design-a-key-value-store.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://learning-guide.gitbook.io/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-08-design-a-url-shortener.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.

### Option 2 — Browse the documentation index

Full index: https://learning-guide.gitbook.io/system-design-interview/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://learning-guide.gitbook.io/system-design-interview/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/system-design-interview/xi-tong-she-ji-mian-shi-nei-mu-zhi-nan-di-yi-juan/chapter-08-design-a-url-shortener.md`).

You may also use `Accept: text/markdown` header for content negotiation.