Java nginx和springrest流（文本/事件流）存在问题

我有一个Spring REST控制器，它是这样的：

    @GetMapping(value="/auth/stream/{param}", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
        public ResponseEntity<Flux<ServerSentEvent<LoginRequisition>>> userStream(@PathVariable String param) {
            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Type", "text/event-stream");
            headers.add("Cache-Control", "no-cache");
            headers.add("X-Accel-Buffering", "no");
            return ResponseEntity.ok().headers(headers).body(myStreamManager.DoSomething(param)); 
                    
        }

location /app/ {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_pass http://127.0.0.1:8444/;
}

location /app/auth/stream/ {

               proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                proxy_http_version 1.1;
                proxy_set_header Connection "";
        }

        location /app/ {

                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                
                location /app/auth/stream {
                    proxy_http_version 1.1;
                    proxy_set_header Connection "";
                }
        }

在添加最后两行之后，一切都开始正常工作：

location /app/ {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Host $http_host;
            proxy_pass http://127.0.0.1:8444/;
            #new lines
            proxy_http_version 1.1;
            proxy_set_header Connection "";
}

但是这个位置/app/适用于所有其他端点，我不需要将它们配置为长时间运行的http连接，所以我尝试仅将此规则定义到我的特定端点，这就造成了混乱

首先，我尝试将地图添加到一个新位置，如下所示：

    @GetMapping(value="/auth/stream/{param}", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
        public ResponseEntity<Flux<ServerSentEvent<LoginRequisition>>> userStream(@PathVariable String param) {
            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Type", "text/event-stream");
            headers.add("Cache-Control", "no-cache");
            headers.add("X-Accel-Buffering", "no");
            return ResponseEntity.ok().headers(headers).body(myStreamManager.DoSomething(param)); 
                    
        }

location /app/ {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_pass http://127.0.0.1:8444/;
}

location /app/auth/stream/ {

               proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                proxy_http_version 1.1;
                proxy_set_header Connection "";
        }

        location /app/ {

                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                
                location /app/auth/stream {
                    proxy_http_version 1.1;
                    proxy_set_header Connection "";
                }
        }

但它不起作用。我还尝试使用子定位，如下所示：

    @GetMapping(value="/auth/stream/{param}", produces = MediaType.TEXT_EVENT_STREAM_VALUE)
        public ResponseEntity<Flux<ServerSentEvent<LoginRequisition>>> userStream(@PathVariable String param) {
            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Type", "text/event-stream");
            headers.add("Cache-Control", "no-cache");
            headers.add("X-Accel-Buffering", "no");
            return ResponseEntity.ok().headers(headers).body(myStreamManager.DoSomething(param)); 
                    
        }

location /app/ {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $http_host;
        proxy_pass http://127.0.0.1:8444/;
}

location /app/auth/stream/ {

               proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                proxy_http_version 1.1;
                proxy_set_header Connection "";
        }

        location /app/ {

                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header X-Forwarded-Proto $scheme;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $http_host;
                proxy_pass http://127.0.0.1:8444/;
                
                location /app/auth/stream {
                    proxy_http_version 1.1;
                    proxy_set_header Connection "";
                }
        }

但它也不起作用。Moerover，当我尝试这些方法时，即使我将最后两行添加到location/app/上，该方法仍然不起作用，但只要我删除新位置，它就会开始正常工作

有人知道发生了什么事吗