如何使服务器发送的事件(SSE)通过Zuul Proxy spring-boot 2.1.1工作

本文介绍了如何使服务器发送的事件(SSE)通过Zuul Proxy spring-boot 2.1.1工作的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我在通过zuul反向代理通过SSE工作时遇到了一些问题

I have some issues getting SSE working trough my zuul reverse proxy

我的设置:

Spring boot version: 2.1.1.RELEASE
Spring cloud dependencies: Greenwich.RC1
Angular-cli: Angular 7
Kotlin: 1.3.11
os: Linux

我有一个使用SSE的小型休息服务

I have a small rest service that uses SSE

@SpringBootApplication
@RestController
@CrossOrigin("http://localhost:19195")
class RestApplication {
    private final val processor = DirectProcessor.create<Int>().serialize()
    private final val sink = processor.sink()
    private final val counter = AtomicInteger()

    @GetMapping("/stream")
    fun stream(): Flux<ServerSentEvent<Int>> {
        println("Stream connected")
        return processor.map { n -> ServerSentEvent.builder<Int>(n).build() }
    }

    @GetMapping("/increment")
    fun sink() {
        sink.next(counter.incrementAndGet())
    }

}

如果我的EventSource从我的角度服务直接连接到它，这将很好工作:

This works fine if my EventSource connects directly to it from my angular service:

const sse = new EventSource('http://localhost:8080/stream');
sse.onopen = (event) => {
  console.log('OnOpen ' + event);
};
sse.onmessage = (event) => {
  console.log(event);
sse.onerror = (error) => {
  console.log(error);
};

如果我点击/increment端点，则该服务会接收到具有递增值的sse事件.

If I hit the /increment endpoint the service receives sse events with incrementing values.

现在使用此zuul配置:

Now with this zuul config:

zuul:
 sensitive-headers:
 routes:
  rest:
    path: /rest/**
    url: http://192.168.75.90:8080
 add-proxy-headers: true
 add-host-header: true

Angular服务已更新为通过代理:

Angular service updated to go via proxy:

const sse = new EventSource('rest/stream');
sse.onopen = (event) => {
  console.log('OnOpen ' + event);
};
sse.onmessage = (event) => {
console.log(event);

};
sse.onerror = (error) => {
console.log(error);
};

现在我的角度服务，连接到流，等待默认的zuul超时(10秒)，然后返回406并重新连接.那就是如果我没有数据.

Now my angular service, connects to the stream, waits for the default zuul timeout (10 seconds) then returns a 406 and reconnects. That is if i have no data.

如果我在接收器中有数据，它会连接到sse流，并且只要我将数据推入流中就不会发生任何事情.当我停止推送数据时，EventSource等待zuul超时(10秒)，然后接收流中的所有数据并断开连接/重新连接.

If i have data in the sink, it connects to the sse stream and nothing happens as long as i am pushing data onto the stream. When I stop pushing data EventSource waits for zuul timeout (10 seconds) then receives all data on stream and disconnects/reconnects.

我知道zuul 1.x不支持SSE，但是我希望与Spring Boot 2.1.1捆绑在一起的zuul可以.

I am aware that zuul 1.x does not support SSE, but I was hoping the zuul bundeled with spring boot 2.1.1 would.

有人知道吗?

Zuul

如何使服务器发送的事件(SSE)通过Zuul Proxy spring-boot 2.1.1工作

问题描述

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