DO it again: how we used Durable Objects to add WebSockets support and authentication to AI Gateway

This post details the implementation of WebSocket support and authentication for Cloudflare's AI Gateway. It describes how Durable Objects are used to manage persistent WebSocket connections, handle authentication via API tokens (including a fallback for browser limitations using the 'sec-websocket-protocol' header), and route requests to various AI providers. The post also introduces the `eventId` field for correlating asynchronous messages in streaming scenarios and provides code examples for both Node.js and browser WebSocket clients.