`hattip-ws/uwebsockets` does not forward Hattip context to connected peers

[aleclarson]

I ran out of time to implement this, but if anyone's interested in contributing, take a look at how it's done in the hattip-ws/node adapter. The difficulty is that UWS (like Node) doesn't handle upgrade requests in a normal request handler, instead opting for a special, out-of-line handler. Also, unlike with Deno/Bun/Cloudflare, crossws wraps the UWS/Node request in a "proxy" object (presumedly for normalization), so the call to forwardHattipContext is less straight-forward.

Here's the hattip-ws/node implementation:

hattip-ws/src/adapters/node/node.ts

Lines 41 to 78 in ef25ef7

	export function createWebSocketAdapter(
	options?: WebSocketAdapterOptions
	): WebSocketAdapter {
	const upgradeRequests = new WeakMap<http.IncomingMessage, Buffer>()
	let upgradedContext: RequestContext | undefined
	const { handleUpgrade, ...adapter } = crossws(
	interceptUpgrade(options, request => {
	forwardHattipContext(request, upgradedContext!)
	upgradedContext = undefined
	}) as any
	)
	return {
	...(adapter as WebSocketAdapter),
	handler: context => {
	const { request } = context.platform
	const head = upgradeRequests.get(request)
	if (head) {
	upgradeRequests.delete(request)
	upgradedContext = context
	return handleUpgrade(request, request.socket, head)
	}
	return context.next()
	},
	configureServer(server) {
	server.on('upgrade', (request, _socket, head) => {
	if (request.headers.upgrade === 'websocket') {
	upgradeRequests.set(request, head)
	// Forward the upgrade request to the Hattip handler.
	const response = new http.ServerResponse(request)
	server.emit('request', request, response)
	}
	})
	},
	}
	}