/
proxy.go
55 lines (46 loc) · 1.44 KB
/
proxy.go
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package kubecontroller
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"github.com/makeok/go-web-init/pkg/common"
"github.com/gin-gonic/gin"
"github.com/sirupsen/logrus"
"k8s.io/apimachinery/pkg/util/proxy"
"k8s.io/client-go/rest"
)
type errorResponder struct{}
func (e *errorResponder) Error(w http.ResponseWriter, req *http.Request, err error) {
logrus.Errorf("proxy k8s err: %v", err)
resp := &common.Response{
Code: http.StatusInternalServerError,
Msg: err.Error(),
}
json.NewEncoder(w).Encode(resp)
}
func ProxyKubeAPIServer(config *rest.Config) gin.HandlerFunc {
kubernetes, _ := url.Parse(config.Host)
defaultTransport, err := rest.TransportFor(config)
if err != nil {
logrus.Errorf("Unable to create transport from rest.Config: %v", err)
return func(*gin.Context) {}
}
return func(c *gin.Context) {
defer func() {
if err := recover(); err == http.ErrAbortHandler {
return
} else if err != nil {
common.ResponseFailed(c, http.StatusInternalServerError, fmt.Errorf("%v", err))
}
}()
s := *c.Request.URL
s.Host = kubernetes.Host
s.Scheme = kubernetes.Scheme
// make sure we don't override kubernetes's authorization
c.Request.Header.Del("Authorization")
httpProxy := proxy.NewUpgradeAwareHandler(&s, defaultTransport, true, false, &errorResponder{})
httpProxy.UpgradeTransport = proxy.NewUpgradeRequestRoundTripper(defaultTransport, defaultTransport)
httpProxy.ServeHTTP(c.Writer, c.Request)
}
}