Node.js AdvancedLesson 95Free preview

Net Module

This lesson is part of Node.js · All levels

Summary

This lesson discusses the net modules for TCP socket-level network communication at Node.js. You'll create TCP servers and clients with net.createServer and net.connect, then handle event data, end, and error. These modules become the foundation of custom protocols, such as game servers, proxies, or services that require full control over the flow of bytes.

Key points

Net.createServer makes the TCP server; net.connect(host, port) makes the client.
Sockets are stream-like: use event 'data' to read and socket.write() to write.
Event 'end' indicates the client closes the writing side; 'close' indicates the socket is completely closed.
Since TCP has no message limit, you need to frame it yourself.
Set error handler because the network can fail at any time (ECONNRESET, etc.).

Full lesson

Code examples and quizzes

Full lessons, code examples, and quizzes are available to subscribers. 5 questions.