Pushpin
Proxy server for adding push to your API
...Pushpin supports HTTP streaming, HTTP long-polling, and WebSockets. For compatibility with older browsers, it can also translate from SockJS. Clients communicate using your API contract. Pushpin is a server-side implementation detail. An existing real-time API can be migrated to or away from Pushpin without breaking clients. Since Pushpin is a proxy server, the backend can be written in any language. Convenience libraries are available to make integration easy. With Pushpin, API management systems can manage real-time endpoints. ...