HTTP/2 & HTTP/1.1 Proxy for Node.js

http2-proxy is a robust Node.js library engineered to serve as a high-performance proxy for both HTTP/2 and HTTP/1.1 traffic, including support for WebSocket connections. Currently at version 5.0.53, the library maintains an active development status, though its major version release cadence appears irregular, with a significant jump from 1.x to 5.x. A core differentiator is its adherence to HTTP specifications, automatically managing critical headers such as hop-by-hop, connection, via, and forward. It is designed to be fully compatible with Node.js's async/await paradigm, with callback-based usage being an optional but discouraged alternative. A notable feature is its resilience during 503 errors, where it's safe to assume no data was read or written, enabling reliable request retries for all methods, including non-idempotent ones. Users are responsible for implementing their own final and error handlers, as the library does not perform automatic cleanup of errored responses, which provides flexibility for custom retry mechanisms. It requires Node.js v10.0.0 or higher to function correctly. The package also integrates seamlessly with common middleware frameworks like Connect and security libraries like Helmet.