angular使用stompjs进行长连接通讯

npm install @stomp/ng2-stompjs --save

    const stompConfig: StompConfig = {
      // Which server?
      url: 'ws://127.0.0.1:15674/ws',

      // Headers
      // Typical keys: login, passcode, host
      headers: {
        login: 'guest',
        passcode: 'guest'
      },

      // How often to heartbeat?
      // Interval in milliseconds, set to 0 to disable
      heartbeat_in: 0, // Typical value 0 - disabled
      heartbeat_out: 20000, // Typical value 20000 - every 20 seconds

      // Wait in milliseconds before attempting auto reconnect
      // Set to 0 to disable
      // Typical value 5000 (5 seconds)
      reconnect_delay: 5000,

      // Will log diagnostics on console
      debug: true
    };



@NgModule({
  declarations: [
    AppComponent,
    RawDataComponent,
    StatusComponent,
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule
  ],
  providers: [
    StompService,
    {
      provide: StompConfig,
      useValue: stompConfig
    }
  ],
  bootstrap: [AppComponent]
})