我尝试通过JS-WebSocket在Java WebsocketServer(LINQ queries are no longer evaluated on the client)与网页之间进行通信。
我的JS-Websocket:
window.websocket = new WebSocket("ws://localhost:8000");
window.websocket.onopen = () => {
window.websocket.send("Hello")
}
window.websocket.onmmessage = function(event) {
alert('Hi');
console.log(event.data);
}
和我的Java Websocket-Server:
package test;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.HashSet;
import java.util.Set;
import org.java_websocket.WebSocket;
import org.java_websocket.handshake.ClientHandshake;
import org.java_websocket.server.WebSocketServer;
public class testsocket extends WebSocketServer {
private static int TCP_PORT = 9000;
private Set<WebSocket> conns;
public testsocket() throws UnknownHostException {
super(new InetSocketAddress(TCP_PORT));
conns = new HashSet<>();
}
@Override
public void onOpen(WebSocket conn, ClientHandshake handshake) {
conns.add(conn);
System.out.println("New connection from " + conn.getRemoteSocketAddress().getAddress().getHostAddress());
}
@Override
public void onClose(WebSocket conn, int code, String reason, boolean remote) {
}
@Override
public void onMessage(WebSocket conn, String message) {
System.out.println(message);
String s2send = "hello";
System.out.println(s2send);
conn.send(s2send);
}
@Override
public void onError(WebSocket conn, Exception ex) {
ex.printStackTrace();
if (conn != null) {
conns.remove(conn);
// do some thing if required
}
}
}
因此,我的Java-Websocket打印“ Hello”,以便可以从JS到Java进行通信,但是另一方面,我的Websocket既未显示警报也未在控制台中打印,因此我假设onmessage不会触发>
答案 0 :(得分:1)
如果确定,您的Java ws服务器正在运行...那么
有一个错字!事件侦听器应为window.websocket.onmessage
。 否 window.websocket.onmmessage
。两个“ m”:)
window.websocket = new WebSocket("ws://localhost:8000");
window.websocket.onopen = () => {
window.websocket.send("Hello");
};
window.websocket.onmessage = function(event) {
alert("Hi");
console.log(event.data);
};