alright, I've added a "HTTP Pusher" to Crossbar:
The Wiki page explains the most important things. To try it, update Crossbar to 0.9.5:
pip install -U crossbar
and follow the Wiki page.
This isn't a full-fledged, two-way HTTP/WAMP bridge, but covers an important (most important?) use case:
Enhance an existing app with real-time notifications
In other words, in covers the integration:
Exist. App --> HTTP/POST --> Crossbar --> WAMP/WebSocket --> Subscriber
This is minimal invasive to the existing app: use blocking code, use whatever HTTP-capable thingy you want, etc.