/
interceptor.go
44 lines (37 loc) · 1.53 KB
/
interceptor.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package util
import "github.com/miekg/dns"
type ResponseInterceptor struct {
dns.ResponseWriter
Msg *dns.Msg
}
// NewResponseReverter returns a pointer to a new ResponseReverter.
func NewResponseInterceptor(w dns.ResponseWriter) *ResponseInterceptor {
return &ResponseInterceptor{ResponseWriter: w}
}
// WriteMsg records the status code and calls the
// underlying ResponseWriter's WriteMsg method.
func (r *ResponseInterceptor) WriteMsg(res *dns.Msg) error {
r.Msg = res
return nil
}
// Write is a wrapper that records the size of the message that gets written.
func (r *ResponseInterceptor) Write(buf []byte) (int, error) {
return len(buf), nil
}
// Hijack implements dns.Hijacker. It simply wraps the underlying
// ResponseWriter's Hijack method if there is one, or returns an error.
func (r *ResponseInterceptor) Hijack() {
return
}