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local.go
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local.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of the
* License at
*
* https://opensource.org/licenses/Apache-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package filter
import (
"context"
genericrequest "k8s.io/apiserver/pkg/endpoints/request"
"net"
"net/http"
)
const localRequestContextKey = "localRequest"
const localRequestContextValue = "true"
// WithLocal adds the local identify to the context of the http access chain.
func WithLocal(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if ip, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
userIP := net.ParseIP(ip)
if userIP.IsLoopback() {
req = req.WithContext(genericrequest.WithValue(req.Context(), localRequestContextKey, localRequestContextValue))
}
}
handler.ServeHTTP(w, req)
})
}
// LocalFrom get the local identity from request context.
func LocalFrom(ctx context.Context) bool {
b, ok := ctx.Value(localRequestContextKey).(string)
if !ok {
return false
}
return b == localRequestContextValue
}