35 lines
1.3 KiB
Markdown
35 lines
1.3 KiB
Markdown
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[](https://pub.dev/packages/shelf_web_socket)
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[](https://pub.dev/packages/shelf_web_socket/publisher)
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## Web Socket Handler for Shelf
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`shelf_web_socket` is a [Shelf][] handler for establishing [WebSocket][]
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connections. It exposes a single function, [webSocketHandler][], which calls an
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`onConnection` callback with a [WebSocketChannel][] object for every
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connection that's established.
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[Shelf]: https://pub.dev/packages/shelf
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[WebSocket]: https://tools.ietf.org/html/rfc6455
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[webSocketHandler]: https://pub.dev/documentation/shelf_web_socket/latest/shelf_web_socket/webSocketHandler.html
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[WebSocketChannel]: https://pub.dev/documentation/web_socket_channel/latest/web_socket_channel/WebSocketChannel-class.html
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```dart
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import 'package:shelf/shelf_io.dart' as shelf_io;
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import 'package:shelf_web_socket/shelf_web_socket.dart';
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void main() {
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var handler = webSocketHandler((webSocket, _) {
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webSocket.stream.listen((message) {
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webSocket.sink.add('echo $message');
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});
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});
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shelf_io.serve(handler, 'localhost', 8080).then((server) {
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print('Serving at ws://${server.address.host}:${server.port}');
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});
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}
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```
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