WebSocket
協定A communication protocol that provides full-duplex communication channels over a single TCP connection.
What is WebSocket?
WebSocket is a computer communications protocol, providing full-duplex communication channels over a single TCP connection. In the context of WebRTC, WebSocket is the most common transport protocol used for Signaling—the process of setting up and managing the call before the peer-to-peer connection is established.
Why WebSocket?
- Real-time: Unlike HTTP, which requires a new request for every message, WebSocket keeps the connection open, allowing messages (like "User A is calling") to be pushed instantly.
- Bi-directional: Both the client and server can send data at any time.
- Low Overhead: Once established, data frames have very little header overhead compared to HTTP requests.