给指定域名的转发设置为 http1 的 codec

[whitebear009]

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Ⅰ. Issue Description

有一个长连接的业务场景，因为服务只支持 http1，而浏览器优先通过 http2 访问 higress gateway，higress gateway 如果用 auto codec 会用 http2 与服务交互，从而会有一些问题，所以想给对应域名的转发设置为 http 1。

我研究了一下 EnovyFilter 的配置，配置了如下的 yaml 貌似没有作用：

apiVersion: networking.istio.io/v1alpha3
kind: EnvoyFilter
metadata:
  name: http1-codec
  namespace: higress-system
spec:
  configPatches:
    - applyTo: HTTP_FILTER
      match:
        context: GATEWAY
        listener:
          filterChain:
            filter:
              name: envoy.filters.network.http_connection_manager
        original_destination:
          host: "sit-sse.xxx.com"
      patch:
        operation: REPLACE
        value:
          name: envoy.filters.http.router
          typed_config:
            "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
            http_connection_manager:
              codec_type: HTTP1

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

对应 access log:

{"authority":"sit-sse.xxx.com","bytes_received":"415","bytes_sent":"2806","downstream_local_address":"172.28.225.141:443","downstream_remote_address":"10.1.9.64:13276","duration":"1133","istio_policy_status":"-","method":"POST","path":"/api/agentchat/conversation","protocol":"HTTP/2","request_id":"ce281ac8-f05e-4780-b8be-0ebd745b476c","requested_server_name":"sit-sse.xxx.com","response_code":"200","response_flags":"-","route_name":"ingress-service/ingress-sit-sse-xxx-com","start_time":"2024-12-02T06:12:49.351Z","trace_id":"dcba9f5a35c2c336ec05ba12e3d75d19","upstream_cluster":"outbound|80||web-be-mdw-dev-site-sitxxxsse-80.ingress-service.svc.cluster.local","upstream_host":"10.212.92.233:80","upstream_local_address":"172.28.225.141:52546","upstream_service_time":"-","upstream_transport_failure_reason":"-","user_agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36","x_forwarded_for":"10.1.9.64"}

仍然是 HTTP2.0

Ⅲ. Describe what you expected to happen

Ⅳ. How to reproduce it (as minimally and precisely as possible)

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• Higress version: 1.4.2
• OS :
• Others: