RTWebSocket is a simple protocol, inspired by RTMFP (RFC 7016), that multiplexes prioritized message flows over a WebSocket connection. A reference implementation is provided here in JavaScript. A C++ implementation is available in the RTMFP Library project test directory.
Protocol features include:
- Multiple parallel unidirectional message flows over a single WebSocket
- Flows have binary metadata instead of port numbers
- Return flow association for generalized bidirectional communication
- The sender can abandon a message after queuing, even if transmission of the message has started
- Independent per-flow flow control
Features of the reference implementation:
- A message can be given an expiration time when queued, after which it is automatically abandoned
- Queuing a message returns a
WriteReceiptthat can be used to track delivery and manually abandon the message - Bufferbloat mitigation
- A new incoming return flow arrives as a callback on the flow to which it is associated
- Flow priority/precedence can be changed on the fly
- The receiver can suspend message delivery per-flow
The protocol is described in protocol.
Web IDL documentation for the reference implementation is in API.md.
Licensed under the MIT License.