Cookbook: WebSocket
```bash
cargo run -p websocket-echo -- 127.0.0.1:8080
# connect any WebSocket client to ws://127.0.0.1:8080/HTTP/1.1 Upgrade echo via CleartextHttpEndpoint + stock EchoFactory.
Source: examples/websocket. Guide: WebSocket.
```bash
cargo run -p websocket-echo -- 127.0.0.1:8080
# connect any WebSocket client to ws://127.0.0.1:8080/HTTP/1.1 Upgrade echo via CleartextHttpEndpoint + stock EchoFactory.
Source: examples/websocket. Guide: WebSocket.