forked from goodrain/rainbond
-
Notifications
You must be signed in to change notification settings - Fork 0
/
tokentransport.go
145 lines (120 loc) · 3.52 KB
/
tokentransport.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
// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package registry
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
)
type TokenTransport struct {
Transport http.RoundTripper
Username string
Password string
}
func (t *TokenTransport) RoundTrip(req *http.Request) (*http.Response, error) {
resp, err := t.Transport.RoundTrip(req)
if err != nil {
return resp, err
}
if authService := isTokenDemand(resp); authService != nil {
resp, err = t.authAndRetry(authService, req)
}
return resp, err
}
type authToken struct {
Token string `json:"token"`
}
func (t *TokenTransport) authAndRetry(authService *authService, req *http.Request) (*http.Response, error) {
token, authResp, err := t.auth(authService)
if err != nil {
return authResp, err
}
retryResp, err := t.retry(req, token)
return retryResp, err
}
func (t *TokenTransport) auth(authService *authService) (string, *http.Response, error) {
authReq, err := authService.Request(t.Username, t.Password)
if err != nil {
return "", nil, err
}
client := http.Client{
Transport: t.Transport,
}
response, err := client.Do(authReq)
if err != nil {
return "", nil, err
}
if response.StatusCode != http.StatusOK {
return "", response, err
}
defer response.Body.Close()
var authToken authToken
decoder := json.NewDecoder(response.Body)
err = decoder.Decode(&authToken)
if err != nil {
return "", nil, err
}
return authToken.Token, nil, nil
}
func (t *TokenTransport) retry(req *http.Request, token string) (*http.Response, error) {
req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
resp, err := t.Transport.RoundTrip(req)
return resp, err
}
type authService struct {
Realm string
Service string
Scope string
}
func (authService *authService) Request(username, password string) (*http.Request, error) {
url, err := url.Parse(authService.Realm)
if err != nil {
return nil, err
}
q := url.Query()
q.Set("service", authService.Service)
if authService.Scope != "" {
q.Set("scope", authService.Scope)
}
url.RawQuery = q.Encode()
request, err := http.NewRequest("GET", url.String(), nil)
if username != "" || password != "" {
request.SetBasicAuth(username, password)
}
return request, err
}
func isTokenDemand(resp *http.Response) *authService {
if resp == nil {
return nil
}
if resp.StatusCode != http.StatusUnauthorized {
return nil
}
return parseOauthHeader(resp)
}
func parseOauthHeader(resp *http.Response) *authService {
challenges := parseAuthHeader(resp.Header)
for _, challenge := range challenges {
if challenge.Scheme == "bearer" {
return &authService{
Realm: challenge.Parameters["realm"],
Service: challenge.Parameters["service"],
Scope: challenge.Parameters["scope"],
}
}
}
return nil
}