$ show havard/node-openid
This repository is a Node.js library implementing an OpenID 1.0/1.1/2.0 Relying Party (client). It enables Node.js applications to authenticate users via OpenID providers by handling discovery, association, authentication, and assertion verification. The library is modular, with separate modules for HTTP requests, XRDS parsing, and extension handling (Supporting SREG, AX, OAuth, UI, and PAPE extensions). It uses a callback-based asynchronous style and provides default in-memory storage for associations and discovered information, which can be overridden for persistent storage. The codebase shows signs of age but remains functional, with a test suite that includes integration tests against real OpenID providers.
The LLM identified 3 files worth highlighting for reuse:
A focused wrapper around axios that handles OpenID-specific HTTP requirements: setting the Accept header to prefer XRDS content type, managing redirects, and returning raw response data, headers, and status. It is isolated, depends only on axios and qs, and could be reused in other projects needing similar HTTP behavior for OpenID or similar protocols.
A compact parser for XRDS documents used in OpenID Yadis discovery. It extracts services with their types, URIs, IDs, and priorities, sorting by priority. Despite using regex for XML parsing (appropriate for the limited, predictable XRDS structure in OpenID), it is self-contained, dependency-free, and encapsulates the parsing logic cleanly for reuse in other XRDS-processing contexts.
The core OpenID implementation features a well-designed extension mechanism where extensions (like SREG, AX, etc.) are plugged in via a common interface (requestParams and fillResult methods). This decouples extension logic from the core authentication flow, allowing new extensions to be added without modifying the library. The pattern is demonstrably reusable in other systems requiring optional, configurable extensions.