java - 无法连接通过 sparkjava 创建的 websocket url
问题描述
我正在尝试使用sparkjava框架创建一个 websocket。下面是创建 websocket 的代码
public final class MainWS {
static Map<Session, String> USER_SESSION_MAP = new ConcurrentHashMap<>();
static int nextUserNumber = 1;
public static void main(String[] args) {
port(8090);
webSocket("/echo", ChatWebSocketHandler.class);
init();
}
public static void broadcastMessage(String sender, String message) {
USER_SESSION_MAP.keySet().stream().filter(Session::isOpen).forEach(session -> {
try {
session.getRemote().sendString(String.valueOf(new JSONObject().put("userMessage", "message to pass")
.put("userlist", USER_SESSION_MAP.values())));
} catch (Exception e) {
e.printStackTrace();
}
});
}
}
现在 CharWebSocketHandler 代码如下:
@WebSocket
public final class ChatWebSocketHandler {
private String sender, msg;
@OnWebSocketConnect
private void onConnect(Session user) throws Exception {
String username = "User" + MainWS.nextUserNumber++;
MainWS.USER_SESSION_MAP.put(user, username);
MainWS.broadcastMessage(sender = "Server", msg = (username + " joined the Main"));
}
@OnWebSocketClose
private void onClose(Session user, int statusCode, String reason) {
String username = MainWS.USER_SESSION_MAP.get(user);
MainWS.USER_SESSION_MAP.remove(user);
MainWS.broadcastMessage(sender = "Server", msg = (username + " left the Main"));
}
@OnWebSocketMessage
private void onMessage(Session user, String message) {
MainWS.broadcastMessage(sender = MainWS.USER_SESSION_MAP.get(user), msg = message);
}
}
运行我的 MainWS 程序后,我使用 rxjs 通过 Angular 获取 websocket 连接
代码如下:
export class WebsocketService {
socket: WebSocketSubject<WSMessageService>
constructor() {
this.socket = new WebSocketSubject("ws://localhost:8090/echo");
this.socket.subscribe(
msg => {
console.log(msg)
},
err => {
console.log(err)
},
() => {
console.log('complete')
}
);
}
public sendMessage(message: WSMessageService): void {
this.socket.next(message)
}
}
现在,当我尝试运行我的代码时,我收到如下错误:
Firefox 无法在 ws://localhost:8090/echo 处建立与服务器的连接错误 { target: WebSocket, isTrusted: true, srcElement: WebSocket, currentTarget: WebSocket, eventPhase: 2, bubbles: false, cancelable: false, returnValue:真,defaultPrevented:假,组成:假,... }
完全不确定我到底在哪里做错了。如果有人有任何想法,请告诉我。
解决方案
问题是我在 ChatWebSocketHandler 类中创建了所有私有方法。完成所有公共方法后,我能够连接并获取 websocket 对象。