-
Notifications
You must be signed in to change notification settings - Fork 1.8k
/
controlupdate.go
193 lines (167 loc) · 4.81 KB
/
controlupdate.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
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
package home
import (
"context"
"encoding/json"
"net/http"
"os"
"os/exec"
"path/filepath"
"runtime"
"syscall"
"time"
"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
"github.com/AdguardTeam/AdGuardHome/internal/updater"
"github.com/AdguardTeam/golibs/errors"
"github.com/AdguardTeam/golibs/log"
)
// temporaryError is the interface for temporary errors from the Go standard
// library.
type temporaryError interface {
error
Temporary() (ok bool)
}
// Get the latest available version from the Internet
func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
resp := &versionResponse{}
if Context.disableUpdate {
// w.Header().Set("Content-Type", "application/json")
resp.Disabled = true
_ = json.NewEncoder(w).Encode(resp)
// TODO(e.burkov): Add error handling and deal with headers.
return
}
req := &struct {
Recheck bool `json:"recheck_now"`
}{}
var err error
if r.ContentLength != 0 {
err = json.NewDecoder(r.Body).Decode(req)
if err != nil {
httpError(w, http.StatusBadRequest, "JSON parse: %s", err)
return
}
}
for i := 0; i != 3; i++ {
func() {
Context.controlLock.Lock()
defer Context.controlLock.Unlock()
resp.VersionInfo, err = Context.updater.VersionInfo(req.Recheck)
}()
if err != nil {
var terr temporaryError
if errors.As(err, &terr) && terr.Temporary() {
// Temporary network error. This case may happen while
// we're restarting our DNS server. Log and sleep for
// some time.
//
// See https://github.com/AdguardTeam/AdGuardHome/issues/934.
d := time.Duration(i) * time.Second
log.Info("temp net error: %q; sleeping for %s and retrying", err, d)
time.Sleep(d)
continue
}
}
break
}
if err != nil {
vcu := Context.updater.VersionCheckURL()
// TODO(a.garipov): Figure out the purpose of %T verb.
httpError(w, http.StatusBadGateway, "Couldn't get version check json from %s: %T %s\n", vcu, err, err)
return
}
resp.confirmAutoUpdate()
w.Header().Set("Content-Type", "application/json")
err = json.NewEncoder(w).Encode(resp)
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
}
}
// handleUpdate performs an update to the latest available version procedure.
func handleUpdate(w http.ResponseWriter, _ *http.Request) {
if Context.updater.NewVersion() == "" {
httpError(w, http.StatusBadRequest, "/update request isn't allowed now")
return
}
err := Context.updater.Update()
if err != nil {
httpError(w, http.StatusInternalServerError, "%s", err)
return
}
returnOK(w)
if f, ok := w.(http.Flusher); ok {
f.Flush()
}
// The background context is used because the underlying functions wrap
// it with timeout and shut down the server, which handles current
// request. It also should be done in a separate goroutine due to the
// same reason.
go func() {
finishUpdate(context.Background())
}()
}
// versionResponse is the response for /control/version.json endpoint.
type versionResponse struct {
Disabled bool `json:"disabled"`
updater.VersionInfo
}
// confirmAutoUpdate checks the real possibility of auto update.
func (vr *versionResponse) confirmAutoUpdate() {
if vr.CanAutoUpdate != nil && *vr.CanAutoUpdate {
canUpdate := true
var tlsConf *tlsConfigSettings
if runtime.GOOS != "windows" {
tlsConf = &tlsConfigSettings{}
Context.tls.WriteDiskConfig(tlsConf)
}
if tlsConf != nil &&
((tlsConf.Enabled && (tlsConf.PortHTTPS < 1024 ||
tlsConf.PortDNSOverTLS < 1024 ||
tlsConf.PortDNSOverQUIC < 1024)) ||
config.BindPort < 1024 ||
config.DNS.Port < 1024) {
canUpdate, _ = aghnet.CanBindPrivilegedPorts()
}
vr.CanAutoUpdate = &canUpdate
}
}
// finishUpdate completes an update procedure.
func finishUpdate(ctx context.Context) {
log.Info("Stopping all tasks")
cleanup(ctx)
cleanupAlways()
exeName := "AdGuardHome"
if runtime.GOOS == "windows" {
exeName = "AdGuardHome.exe"
}
curBinName := filepath.Join(Context.workDir, exeName)
if runtime.GOOS == "windows" {
if Context.runningAsService {
// Note:
// we can't restart the service via "kardianos/service" package - it kills the process first
// we can't start a new instance - Windows doesn't allow it
cmd := exec.Command("cmd", "/c", "net stop AdGuardHome & net start AdGuardHome")
err := cmd.Start()
if err != nil {
log.Fatalf("exec.Command() failed: %s", err)
}
os.Exit(0)
}
cmd := exec.Command(curBinName, os.Args[1:]...)
log.Info("Restarting: %v", cmd.Args)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Start()
if err != nil {
log.Fatalf("exec.Command() failed: %s", err)
}
os.Exit(0)
} else {
log.Info("Restarting: %v", os.Args)
err := syscall.Exec(curBinName, os.Args, os.Environ())
if err != nil {
log.Fatalf("syscall.Exec() failed: %s", err)
}
// Unreachable code
}
}