关于SseEmitter(SSE)在本地可以响应，部署到服务器后无法响应的问题

@GetMapping(value = "/v3/detail", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
@ResponseBody
public SseEmitter v3Detail(String id) {
     SseEmitter emitter = new SseEmitter((long) (60 * 1000 * 10));

     V2Params params = v3ParamMap.get(id);
     if (params == null) {
         getSend(emitter, "result", "id is not found: " + id);
         return emitter;
     }
	 // CODE...

	return emitter;
}

本地刷刷就响应了，服务器上无法响应：

经过排查发现是 nginx 的问题
因为是域名通过nginx代理转发到java应用的

解决：

http {
    upstream java_app {
        server 127.0.0.1:8056;
    }

    server {
        listen 80;
        server_name example.com;

        location / {
            proxy_pass http://java_app;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            # SSE support
            proxy_buffering off;
            proxy_cache off;
            proxy_read_timeout 86400s;
            proxy_send_timeout 86400s;
        }
    }
}