如何使用javascript-client关闭与sseflux的连接？

Question

I build a server-send-event endpoint with spring webflux. My javascript app subscribes to that endpoint and receives the published events correctly. BUT when call EventSource.close() it seems the publisher is not informed that the client closed the connection.

Hence, the publisher is still thinking that there is a subscription, and publishes events to that.

The event stream is potentially never ending, so I never get a complete signal on the publisher side, which means the client has to close the connection.

I think that this happens because the close() call can't reach the underlying flux.

Do you have any solution or workaround for this problem?

@GetMapping(value = INSTANCE_UPDATE_ENDPOINT + "/{dealId}", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
public Flux<ServerSentEvent<InstanceUpdatedQuery>> getInstanceUpdateEventStreamForDeal(@PathVariable final String dealId) {

       return this.instanceUpdatedApplicationEventFlux
               .filter(instanceUpdatedEvent -> instanceUpdatedEvent.getDealId().equals(dealId))
               .map(instanceUpdatedEvent -> ServerSentEvent.<InstanceUpdatedQuery>builder()
                       .id(instanceUpdatedEvent.getId())
                       .retry(Duration.ofSeconds(1))
                       .data(new InstanceUpdatedQuery(instanceUpdatedEvent))
                       .build())
}

Answer 1

您应该添加一个处理程序以捕获doOnNext（Signal），然后检测关闭信号并对其进行响应