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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
package ieproxy
import (
"strings"
"sync"
"unsafe"
"golang.org/x/sys/windows/registry"
)
type regeditValues struct {
ProxyServer string
ProxyOverride string
ProxyEnable uint64
AutoConfigURL string
}
var once sync.Once
var windowsProxyConf ProxyConf
// GetConf retrieves the proxy configuration from the Windows Regedit
func getConf() ProxyConf {
once.Do(writeConf)
return windowsProxyConf
}
func writeConf() {
proxy := ""
proxyByPass := ""
autoConfigUrl := ""
autoDetect := false
// Try from IE first.
if ieCfg, err := getUserConfigFromWindowsSyscall(); err == nil {
defer globalFreeWrapper(ieCfg.lpszProxy)
defer globalFreeWrapper(ieCfg.lpszProxyBypass)
defer globalFreeWrapper(ieCfg.lpszAutoConfigUrl)
proxy = StringFromUTF16Ptr(ieCfg.lpszProxy)
proxyByPass = StringFromUTF16Ptr(ieCfg.lpszProxyBypass)
autoConfigUrl = StringFromUTF16Ptr(ieCfg.lpszAutoConfigUrl)
autoDetect = ieCfg.fAutoDetect
}
// Try WinHTTP default proxy.
if defaultCfg, err := getDefaultProxyConfiguration(); err == nil {
defer globalFreeWrapper(defaultCfg.lpszProxy)
defer globalFreeWrapper(defaultCfg.lpszProxyBypass)
newProxy := StringFromUTF16Ptr(defaultCfg.lpszProxy)
if proxy == "" {
proxy = newProxy
}
newProxyByPass := StringFromUTF16Ptr(defaultCfg.lpszProxyBypass)
if proxyByPass == "" {
proxyByPass = newProxyByPass
}
}
if proxy == "" && !autoDetect {
// Fall back to IE registry or manual detection if nothing is found there..
regedit, _ := readRegedit() // If the syscall fails, backup to manual detection.
windowsProxyConf = parseRegedit(regedit)
return
}
// Setting the proxy settings.
windowsProxyConf = ProxyConf{
Static: StaticProxyConf{
Active: len(proxy) > 0,
},
Automatic: ProxyScriptConf{
Active: len(autoConfigUrl) > 0 || autoDetect,
},
}
if windowsProxyConf.Static.Active {
protocol := make(map[string]string)
for _, s := range strings.Split(proxy, ";") {
s = strings.TrimSpace(s)
if s == "" {
continue
}
pair := strings.SplitN(s, "=", 2)
if len(pair) > 1 {
protocol[pair[0]] = pair[1]
} else {
protocol[""] = pair[0]
}
}
windowsProxyConf.Static.Protocols = protocol
if len(proxyByPass) > 0 {
windowsProxyConf.Static.NoProxy = strings.Replace(proxyByPass, ";", ",", -1)
}
}
if windowsProxyConf.Automatic.Active {
windowsProxyConf.Automatic.PreConfiguredURL = autoConfigUrl
}
}
func getUserConfigFromWindowsSyscall() (*tWINHTTP_CURRENT_USER_IE_PROXY_CONFIG, error) {
if err := winHttpGetIEProxyConfigForCurrentUser.Find(); err != nil {
return nil, err
}
p := new(tWINHTTP_CURRENT_USER_IE_PROXY_CONFIG)
r, _, err := winHttpGetIEProxyConfigForCurrentUser.Call(uintptr(unsafe.Pointer(p)))
if rTrue(r) {
return p, nil
}
return nil, err
}
func getDefaultProxyConfiguration() (*tWINHTTP_PROXY_INFO, error) {
pInfo := new(tWINHTTP_PROXY_INFO)
if err := winHttpGetDefaultProxyConfiguration.Find(); err != nil {
return nil, err
}
r, _, err := winHttpGetDefaultProxyConfiguration.Call(uintptr(unsafe.Pointer(pInfo)))
if rTrue(r) {
return pInfo, nil
}
return nil, err
}
// OverrideEnvWithStaticProxy writes new values to the
// http_proxy, https_proxy and no_proxy environment variables.
// The values are taken from the Windows Regedit (should be called in init() function)
func overrideEnvWithStaticProxy(conf ProxyConf, setenv envSetter) {
if conf.Static.Active {
for _, scheme := range []string{"http", "https"} {
url := mapFallback(scheme, "", conf.Static.Protocols)
setenv(scheme+"_proxy", url)
}
if conf.Static.NoProxy != "" {
setenv("no_proxy", conf.Static.NoProxy)
}
}
}
func parseRegedit(regedit regeditValues) ProxyConf {
protocol := make(map[string]string)
for _, s := range strings.Split(regedit.ProxyServer, ";") {
if s == "" {
continue
}
pair := strings.SplitN(s, "=", 2)
if len(pair) > 1 {
protocol[pair[0]] = pair[1]
} else {
protocol[""] = pair[0]
}
}
return ProxyConf{
Static: StaticProxyConf{
Active: regedit.ProxyEnable > 0,
Protocols: protocol,
NoProxy: strings.Replace(regedit.ProxyOverride, ";", ",", -1), // to match linux style
},
Automatic: ProxyScriptConf{
Active: regedit.AutoConfigURL != "",
PreConfiguredURL: regedit.AutoConfigURL,
},
}
}
func readRegedit() (values regeditValues, err error) {
k, err := registry.OpenKey(registry.CURRENT_USER, `Software\Microsoft\Windows\CurrentVersion\Internet Settings`, registry.QUERY_VALUE)
if err != nil {
return
}
defer k.Close()
values.ProxyServer, _, err = k.GetStringValue("ProxyServer")
if err != nil && err != registry.ErrNotExist {
return
}
values.ProxyOverride, _, err = k.GetStringValue("ProxyOverride")
if err != nil && err != registry.ErrNotExist {
return
}
values.ProxyEnable, _, err = k.GetIntegerValue("ProxyEnable")
if err != nil && err != registry.ErrNotExist {
return
}
values.AutoConfigURL, _, err = k.GetStringValue("AutoConfigURL")
if err != nil && err != registry.ErrNotExist {
return
}
err = nil
return
}
|
