58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package disablecompression
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import (
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"fmt"
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"net"
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"net/http"
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utilnet "k8s.io/apimachinery/pkg/util/net"
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netutils "k8s.io/utils/net"
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)
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// ClientIPPredicate.Predicate implements CompressionDisabledFunc interface that decides
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// based on client IP.
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type ClientIPPredicate struct {
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cidrs []*net.IPNet
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}
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// NewClientIPPredicate creates a new ClientIPPredicate instance.
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func NewClientIPPredicate(cidrStrings []string) (*ClientIPPredicate, error) {
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cidrs, err := netutils.ParseCIDRs(cidrStrings)
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if err != nil {
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return nil, fmt.Errorf("failed to parse cidrs: %v", err)
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}
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return &ClientIPPredicate{cidrs: cidrs}, nil
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}
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// Predicate checks if ClientIP matches any cidr.
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func (c *ClientIPPredicate) Predicate(req *http.Request) (bool, error) {
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ip := utilnet.GetClientIP(req)
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if ip == nil {
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return false, fmt.Errorf("unable to determine source IP for %v", req)
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}
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for _, cidr := range c.cidrs {
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if cidr.Contains(ip) {
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return true, nil
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}
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}
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return false, nil
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}
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