> For the complete documentation index, see [llms.txt](https://socket.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://socket.gitbook.io/docs/4-fu-wu-duan-apiserverapi/4.3-socket/socket_conn.md).

# 4.3.4 socket\_conn

* (engine.Socket)

对基础`客户端`传输连接（engine.io `Socket`对象）的引用。这允许访问IO传输层，该层仍然（大部分）抽象实际的TCP/IP socket。