Mastering HTTP/2 in Node.js: A Hands‑On Guide with Real‑World Examples

Purpose

The author, still using HTTP/1.1, decided to spend time exploring HTTP/2 usage in Node.js.

HTTP/2 Basics

Binary protocol.

Multiplexing allows parallel requests over a single connection, removing HTTP/1.x ordering and blocking constraints.

Header compression reduces repeated header transmission.

Server push lets the server pre‑emptively send resources.

Alt‑Svc support enables smarter CDN caching.

Client‑Hints allow browsers to convey device or network needs.

Secure cookie prefixes help ensure cookies aren’t tampered with.

Current Adoption

Major Chinese platforms have already adopted HTTP/2:

Node.js Implementation

Steps to run HTTP/2 in Node.js:

Install the http2 module: npm i --save http2 Obtain an SSL certificate (the author used a pre‑generated one for testing).

Create the server file. The code reads files via fs, uses a helper plugin, and, unlike HTTP/1.1, imports http2 and calls http2.createSecureServer(options, callback). The options must include the certificate.

Start the project; the browser will render the HTML and load resources.

Key point: the HTML file makes the browser issue 100 fetch requests to demonstrate HTTP/2’s multiplexing.

Project Structure & Environment

Development environment: macOS 10.12.6, Node v8.9.4.

Result

Source Code

GitHub repository: https://github.com/hyy1115/http2-test

Conclusion

Testing confirms that HTTP/2 uses a single TCP connection per domain, compresses headers, and supports server push (not tested here). To try it yourself, download the source, install the plugin, and ensure your environment supports HTTP/2. For deeper knowledge, search Zhihu for related articles.