vapor-docs/3.0/docs/websocket/text-stream.md

Text Streams

WebSockets have separate text and binary data flows.

Sending text input to a WebSocket sends it to the remote. Listening for text on a WebSocket receives text data from clients.

Sending strings

Sending a String using a WebSocket sends it to the remote.

webSocket.send(string)

Receiving strings

String data can be read using the following function. Only one closure can read at a time.

webSocket.onText { text in
  // use the `String`
}