EventSource不刷新多个事件

Question

我有以下代码

@Injectable({
  providedIn: 'root'
})
export class SSEService {
  private eventSource: EventSource;
  private callbacks: Map<string, (e: any) => void> = new Map<string, (e: any) => void>();

  constructor() {
    this.init(environment.channelName);
  }

  init(channel: string) {
    if (this.eventSource) { return; }

    this.eventSource = new EventSource(`${environment.SSE_URL}?channel=${channel}`);
    this.eventSource.onmessage = (e) => {console.log('Connected');};
  }

  protected callListener(cb: (d) => void): (e) => void {
    const callee = ({data}): void => {
      const d = JSON.parse(data);
      cb(d.message);
    };
    return callee;
  }

  private addEventToEventSrc(event: string, callback: any, owner: string): void {
    console.log(`Subscribed to ⇢ ${event} (owned by: ${owner})`);
    const cb = this.callListener(callback);
    this.eventSource.addEventListener(event, cb);
    if (!this.callbacks.get(`${event}_${owner}`)) {
        this.callbacks.set(`${event}_${owner}`, cb);
    }
  }

  subscribe(event: string, callback: any, owner?: string): void {
    if (!this.eventSource) { return; }
    if (!owner) { owner = 'default'; }
    if (!event) { event = 'message'; }
    this.addEventToEventSrc(event, callback, owner);
}

  unsubscribe(event: string, owner?: string): void {
    if (!this.eventSource) { return; }
    if (!owner) { owner = 'default'; }
    if (!event) { event = 'message'; }
    if (this.callbacks.get(`${event}_${owner}`)) {
      console.log(`Unsubscribed to ⇢ ${event} (owned by: ${owner})`);
      this.eventSource.removeEventListener(event, this.callbacks.get(`${event}_${owner}`));
    }
    this.callbacks.delete(`${event}_${owner}`);
  }

  clearAll() {
    if (this.eventSource) {
      this.eventSource.close();
    }
    this.callbacks = new Map<string, (e: any) => void>();
  }
}

在代码的另一个地方，我订阅了2个事件

this.sseService.subscribe(`get_position_1`, (val) => {   console.log(val)});
this.sseService.subscribe(`get_rotation_1`, (val) => {   console.log(val)});

问题是，如果我订阅了那些频道，过了一段时间我就再也没有收到任何更新（即使服务器一直在发送更新）。如果我不订阅两次，那么我将毫无保留地收到所有更新。

我不理解我在SSEService中的错误，因此我希望其他人再次检查您是否有空。