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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// Copyright 2018 The etcd Authors
//
// 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
//
// http://www.apache.org/licenses/LICENSE-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 OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package flags
import (
"flag"
"fmt"
"net/url"
"sort"
"strings"
"go.etcd.io/etcd/client/pkg/v3/types"
)
// UniqueURLs contains unique URLs
// with non-URL exceptions.
type UniqueURLs struct {
Values map[string]struct{}
uss []url.URL
Allowed map[string]struct{}
}
// Set parses a command line set of URLs formatted like:
// http://127.0.0.1:2380,http://10.1.1.2:80
// Implements "flag.Value" interface.
func (us *UniqueURLs) Set(s string) error {
if _, ok := us.Values[s]; ok {
return nil
}
if _, ok := us.Allowed[s]; ok {
us.Values[s] = struct{}{}
return nil
}
ss, err := types.NewURLs(strings.Split(s, ","))
if err != nil {
return err
}
us.Values = make(map[string]struct{})
us.uss = make([]url.URL, 0)
for _, v := range ss {
x := v.String()
if _, exists := us.Values[x]; exists {
continue
}
us.Values[x] = struct{}{}
us.uss = append(us.uss, v)
}
return nil
}
// String implements "flag.Value" interface.
func (us *UniqueURLs) String() string {
all := make([]string, 0, len(us.Values))
for u := range us.Values {
all = append(all, u)
}
sort.Strings(all)
return strings.Join(all, ",")
}
// NewUniqueURLsWithExceptions implements "url.URL" slice as flag.Value interface.
// Given value is to be separated by comma.
func NewUniqueURLsWithExceptions(s string, exceptions ...string) *UniqueURLs {
us := &UniqueURLs{Values: make(map[string]struct{}), Allowed: make(map[string]struct{})}
for _, v := range exceptions {
us.Allowed[v] = struct{}{}
}
if s == "" {
return us
}
if err := us.Set(s); err != nil {
panic(fmt.Sprintf("new UniqueURLs should never fail: %v", err))
}
return us
}
// UniqueURLsFromFlag returns a slice from urls got from the flag.
func UniqueURLsFromFlag(fs *flag.FlagSet, urlsFlagName string) []url.URL {
return (*fs.Lookup(urlsFlagName).Value.(*UniqueURLs)).uss
}
// UniqueURLsMapFromFlag returns a map from url strings got from the flag.
func UniqueURLsMapFromFlag(fs *flag.FlagSet, urlsFlagName string) map[string]struct{} {
return (*fs.Lookup(urlsFlagName).Value.(*UniqueURLs)).Values
}
|
