HTTP Proxy 3

http-proxy-3 is an actively maintained, modern rewrite of the popular `http-proxy` library for Node.js, currently at version 1.23.2. It provides programmable HTTP/HTTPS and WebSocket proxying capabilities, suitable for building reverse proxies, load balancers, or API gateways. Key differentiators include a complete rewrite in TypeScript for enhanced type safety and maintainability, full HTTP/2 support via the `fetch` API, and comprehensive updates to all dependent packages to address security vulnerabilities. The library explicitly fixes known socket leaks and uncatchable WebSocket errors present in the unmaintained original `http-proxy`. It is used in production by major projects like Vite, CoCalc, and JupyterHub, ensuring a stable and reliable solution for integrating application logic with proxy server functionality.