-
Notifications
You must be signed in to change notification settings - Fork 0
/
registry.go
166 lines (144 loc) · 3.16 KB
/
registry.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
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"regexp"
"sync"
"time"
)
type TagsResponse struct {
Name string
Tags []string
}
type AuthResponse struct {
Token string
}
type Manifest struct {
Digest string
Platform struct {
Architecture string
OS string
Variant string
}
Size int
}
type ManifestResponse struct {
SchemaVersion int
MediaType string
Manifests []Manifest
}
type TagDigest struct {
Tag string
Digest string
}
type RegistryClient struct {
client http.Client
Auth bool
AuthURL string
BaseURL string
}
func NewRegistryClient(auth bool, authURL string, baseURL string) *RegistryClient {
return &RegistryClient{
client: http.Client{Timeout: 60 * time.Second},
Auth: auth,
AuthURL: authURL,
BaseURL: baseURL,
}
}
func (c *RegistryClient) get(url string, result interface{}, headers map[string]string) error {
request, err := http.NewRequest("GET", url, nil)
if err != nil {
return err
}
for key, value := range headers {
request.Header.Add(key, value)
}
request.Header.Set("User-Agent", "tagwatch/1.0")
response, err := c.client.Do(request)
if err != nil {
return err
}
if response.StatusCode != 200 {
return fmt.Errorf("request failed with status code %d", response.StatusCode)
}
responseBody, err := ioutil.ReadAll(response.Body)
if err != nil {
return err
}
if err := json.Unmarshal(responseBody, result); err != nil {
return err
}
return nil
}
func matchesAny(tagPattern []string, str string) bool {
for _, pattern := range tagPattern {
matched, err := regexp.MatchString(pattern, str)
if err != nil {
log.Fatalln(err)
}
if matched {
return true
}
}
return false
}
func (c *RegistryClient) ListTags(repo, architecture string, tagPattern []string) []TagDigest {
headers := map[string]string{
"Accept": "application/vnd.docker.distribution.manifest.list.v2+json",
}
if c.Auth {
var authResponse AuthResponse
err := c.get(c.AuthURL+"&scope=repository:"+repo+":pull", &authResponse, nil)
if err != nil {
log.Fatalln(err)
return nil
}
headers["Authorization"] = "Bearer " + authResponse.Token
}
var tagsResponse TagsResponse
url := c.BaseURL + repo + "/tags/list"
if err := c.get(url, &tagsResponse, headers); err != nil {
log.Fatalln(err)
return nil
}
wg := sync.WaitGroup{}
results := make(chan struct {
tag string
response ManifestResponse
})
for _, tag := range tagsResponse.Tags {
wg.Add(1)
go func(tag string) {
defer wg.Done()
if !matchesAny(tagPattern, tag) {
return
}
var manifestResponse ManifestResponse
url := c.BaseURL + repo + "/manifests/" + tag
if err := c.get(url, &manifestResponse, headers); err != nil {
log.Fatalln(err)
return
}
results <- struct {
tag string
response ManifestResponse
}{tag: tag, response: manifestResponse}
}(tag)
}
go func() {
wg.Wait()
close(results)
}()
res := make([]TagDigest, 0, 100)
for r := range results {
for _, manifest := range r.response.Manifests {
if manifest.Platform.Architecture == architecture {
res = append(res, TagDigest{r.tag, manifest.Digest})
}
}
}
return res
}