remove_http1.1_support_code

Signed-off-by: yuswift <yuswiftli@yunify.com>

pkg/apiserver/dispatch/dispatch.go

@@ -18,24 +18,25 @@ package dispatch
 
 import (
 	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"sync"
+
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/util/httpstream"
-	"k8s.io/apimachinery/pkg/util/net"
 	"k8s.io/apimachinery/pkg/util/proxy"
 	"k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/klog"
+
 	clusterv1alpha1 "kubesphere.io/kubesphere/pkg/apis/cluster/v1alpha1"
 	"kubesphere.io/kubesphere/pkg/apiserver/request"
 	clusterinformer "kubesphere.io/kubesphere/pkg/client/informers/externalversions/cluster/v1alpha1"
 	clusterlister "kubesphere.io/kubesphere/pkg/client/listers/cluster/v1alpha1"
-	"net/http"
-	"net/url"
-	"strings"
-	"sync"
 )
 
 const proxyURLFormat = "/api/v1/namespaces/kubesphere-system/services/:ks-apiserver:/proxy%s"
@@ -198,21 +199,6 @@ func (c *clusterDispatch) getInnerCluster(name string) *innerCluster {
 	return nil
 }
 
-// copy from https://github.com/kubernetes/apimachinery/blob/master/pkg/util/proxy/dial.go
-func supportsHTTP11(nextProtos []string) bool {
-	if len(nextProtos) == 0 {
-		return true
-	}
-
-	for _, proto := range nextProtos {
-		if proto == "http/1.1" {
-			return true
-		}
-	}
-
-	return false
-}
-
 func (c *clusterDispatch) updateInnerClusters(obj interface{}) {
 	cluster := obj.(*clusterv1alpha1.Cluster)
 
@@ -247,14 +233,6 @@ func (c *clusterDispatch) updateInnerClusters(obj interface{}) {
 		return
 	}
 
-	tlsConfig, err := net.TLSClientConfig(transport)
-	if err == nil {
-		// since http2 doesn't support websocket, we need to disable http2 when using websocket
-		if supportsHTTP11(tlsConfig.NextProtos) {
-			tlsConfig.NextProtos = []string{"http/1.1"}
-		}
-	}
-
 	c.mutex.Lock()
 	c.innerClusters[cluster.Name] = &innerCluster{
 		kubernetesURL: kubernetesEndpoint,