libapr provides APIs to support network programming. The APIs are based on traditional socket programming scheme. If you are familiar with bind(2), listen(2), accept(2) and connect(2), you can easily understand it. I show you how to use the APIs with three categories, server side progamming, client side progaramming, and multiplex process programming.

APR提供了一组网络编程的API，这些API是基于传统的Socket编程风格。如果你熟悉bind，listen，accept和connect，你将很容易理解它。我将使用三个小节介绍使用这些API，这三个小节是服务器端编程，客户端编程和多进程编程。