ManagedHttpUpgradeHandler

Handles a managed HTTP upgrade on the app-router Node server. Existing `HttpUpgradeHandler` callbacks remain assignable. Handlers that defer verification must call `context.accept()` synchronously; returning without writing a handshake is treated as a decline.

Signature

type ManagedHttpUpgradeHandler = (request: IncomingMessage, socket: Duplex, head: Buffer, context: HttpUpgradeContext): void