// devp2p hello packet advertising version 55 and containing a few additional list elements
@Test
public void test1() {
HelloMessage msg =
new HelloMessage(
decode(
"f87137916b6e6574682f76302e39312f706c616e39cdc5836574683dc6846d6f726b1682270fb840"
+ "fda1cff674c90c9a197539fe3dfb53086ace64f83ed7c6eabec741f7f381cc803e52ab2cd55d5569"
+ "bce4347107a310dfd5f88a010cd2ffd1005ca406f1842877c883666f6f836261720304"));
assertEquals(55, msg.getP2PVersion());
}
@MessageMapping("/hello")
public void greeting(SimpMessageHeaderAccessor headerAccessor, HelloMessage message)
throws Exception {
InetSocketAddress clientAddress =
(InetSocketAddress) headerAccessor.getSessionAttributes().get("remoteAddress");
String ip = clientAddress.getAddress().getHostAddress();
String host = clientAddress.getHostName();
LOG.info("Ping client");
Thread.sleep(1000); // simulated delay
String greetingMsg =
String.format("Hello, %s! From ip: %s, hostname: %s", message.getName(), ip, host);
messagingTemplate.convertAndSend("/cg/websockets/topic/greetings", new Greeting(greetingMsg));
}
public static ByteBuf encode(HelloMessage helloMessage) throws UaException {
return encode(
MessageType.Hello,
(b) -> HelloMessage.encode(helloMessage, b),
Unpooled.buffer().order(ByteOrder.LITTLE_ENDIAN));
}
@MessageMapping("/hello")
@SendTo("/topic/greetings")
public Greeting greeting(HelloMessage message) throws Exception {
// Thread.sleep(3000); // simulated delay
return new Greeting("Hello, " + message.getName() + "!");
}
