udp

Leichte UDP-Bibliothek für Dart.

Verwendung

Ein einfaches Anwendungsbeispiel:

 import 'package:udp/udp.dart' ;


main () async {
    // creates a UDP instance and binds it to the first available network
    // interface on port 65000.
    var sender = await UDP . bind ( Endpoint . any (port : Port ( 65000 )));
  
    // send a simple string to a broadcast endpoint on port 65001.
    var dataLength = await sender. send ( "Hello World!" .codeUnits,
    Endpoint . broadcast (port : Port ( 65001 )));
  
    stdout. write ( "$ dataLength bytes sent." );
  
    // creates a new UDP instance and binds it to the local address and the port
    // 65002.
    var receiver = await UDP . bind ( Endpoint . loopback (port : Port ( 65002 )));
  
    // receivinglistening
    receiver. asStream (timeout : Duration (seconds : 20 )). listen ((datagram) {
      var str = String . fromCharCodes (datagram.data);
      stdout. write (str);
    });
  
    // close the UDP instances and their sockets.
    sender. close ();
    receiver. close ();
  
  
   // MULTICAST
    var multicastEndpoint =
        Endpoint . multicast ( InternetAddress ( "239.1.2.3" ), port : Port ( 54321 ));
  
    var receiver = await UDP . bind (multicastEndpoint);
  
    var sender = await UDP . bind ( Endpoint . any ());
  
    receiver. asStream (). listen ((datagram) {
      if (datagram != null ) {
        var str = String . fromCharCodes (datagram ? .data);
  
        stdout. write (str);
      }
    });
  
    await sender. send ( "Foo" .codeUnits, multicastEndpoint);
  
    await Future . delayed ( Duration (seconds : 5 ));
  
    sender. close ();
    receiver. close ();
  
}

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