func upgradeViaRest() error {
	cfg, err := config.Load(locations[locConfigFile], protocol.LocalDeviceID)
	if err != nil {
		return err
	}
	target := cfg.GUI().URL()
	r, _ := http.NewRequest("POST", target+"/rest/system/upgrade", nil)
	r.Header.Set("X-API-Key", cfg.GUI().APIKey())

	tr := &http.Transport{
		Dial:            dialer.Dial,
		Proxy:           http.ProxyFromEnvironment,
		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	}
	client := &http.Client{
		Transport: tr,
		Timeout:   60 * time.Second,
	}
	resp, err := client.Do(r)
	if err != nil {
		return err
	}
	if resp.StatusCode != 200 {
		bs, err := ioutil.ReadAll(resp.Body)
		defer resp.Body.Close()
		if err != nil {
			return err
		}
		return errors.New(string(bs))
	}

	return err
}

func TestDeviceRename(t *testing.T) {
	ccm := protocol.ClusterConfigMessage{
		ClientName:    "syncthing",
		ClientVersion: "v0.9.4",
	}

	defer os.Remove("tmpconfig.xml")

	rawCfg := config.New(device1)
	rawCfg.Devices = []config.DeviceConfiguration{
		{
			DeviceID: device1,
		},
	}
	cfg := config.Wrap("tmpconfig.xml", rawCfg)

	db, _ := leveldb.Open(storage.NewMemStorage(), nil)
	m := NewModel(cfg, protocol.LocalDeviceID, "device", "syncthing", "dev", db)
	m.ServeBackground()
	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	ccm.Options = []protocol.Option{
		{
			Key:   "name",
			Value: "tester",
		},
	}
	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device did not get a name")
	}

	ccm.Options[0].Value = "tester2"
	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device name got overwritten")
	}

	cfgw, err := config.Load("tmpconfig.xml", protocol.LocalDeviceID)
	if err != nil {
		t.Error(err)
		return
	}
	if cfgw.Devices()[device1].Name != "tester" {
		t.Errorf("Device name not saved in config")
	}
}

func TestFileTypeChange(t *testing.T) {
	// Use no versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{}
	cfg.SetFolder(fld)
	cfg.Save()

	testFileTypeChange(t)
}

func loadConfig() (*config.Wrapper, error) {
	cfgFile := locations[locConfigFile]
	cfg, err := config.Load(cfgFile, myID)

	if err != nil {
		myName, _ := os.Hostname()
		newCfg := defaultConfig(myName)
		cfg = config.Wrap(cfgFile, newCfg)
	}

	return cfg, err
}

func TestSyncClusterStaggeredVersioning(t *testing.T) {
	// Use staggered versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{
		Type: "staggered",
	}
	cfg.SetFolder(fld)
	cfg.Save()

	testSyncCluster(t)
}

func TestFileTypeChangeSimpleVersioning(t *testing.T) {
	// Use simple versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{
		Type:   "simple",
		Params: map[string]string{"keep": "5"},
	}
	cfg.SetFolder(fld)
	cfg.Save()

	testFileTypeChange(t)
}

func TestSyncClusterTrashcanVersioning(t *testing.T) {
	// Use simple versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{
		Type:   "trashcan",
		Params: map[string]string{"cleanoutDays": "1"},
	}
	cfg.SetFolder(fld)
	cfg.Save()

	testSyncCluster(t)
}

func TestSymlinks(t *testing.T) {
	if !symlinksSupported() {
		t.Skip("symlinks unsupported")
	}

	// Use no versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{}
	cfg.SetFolder(fld)
	cfg.Save()

	testSymlinks(t)
}

func TestSymlinksSimpleVersioning(t *testing.T) {
	if !symlinksSupported() {
		t.Skip("symlinks unsupported")
	}

	// Use simple versioning
	id, _ := protocol.DeviceIDFromString(id2)
	cfg, _ := config.Load("h2/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Versioning = config.VersioningConfiguration{
		Type:   "simple",
		Params: map[string]string{"keep": "5"},
	}
	cfg.SetFolder(fld)
	cfg.Save()

	testSymlinks(t)
}

func loadConfig(cfgFile string) (*config.Wrapper, string, error) {
	info, err := os.Stat(cfgFile)
	if err != nil {
		return nil, "", err
	}
	if !info.Mode().IsRegular() {
		return nil, "", errors.New("configuration is not a file")
	}

	cfg, err := config.Load(cfgFile, myID)
	if err != nil {
		return nil, "", err
	}

	myCfg := cfg.Devices()[myID]
	myName := myCfg.Name
	if myName == "" {
		myName, _ = os.Hostname()
	}

	return cfg, myName, nil
}

func (p *Process) eventLoop() {
	since := 0
	notScanned := make(map[string]struct{})
	start := time.Now()
	for {
		p.eventMut.Lock()
		if p.stop {
			p.eventMut.Unlock()
			return
		}
		p.eventMut.Unlock()

		time.Sleep(250 * time.Millisecond)

		events, err := p.Events(since)
		if err != nil {
			if time.Since(start) < 5*time.Second {
				// The API has probably not started yet, lets give it some time.
				continue
			}

			// If we're stopping, no need to print the error.
			p.eventMut.Lock()
			if p.stop {
				p.eventMut.Unlock()
				return
			}
			p.eventMut.Unlock()

			log.Println("eventLoop: events:", err)
			continue
		}
		since = events[len(events)-1].ID

		for _, ev := range events {
			switch ev.Type {
			case "Starting":
				// The Starting event tells us where the configuration is. Load
				// it and populate our list of folders.

				data := ev.Data.(map[string]interface{})
				id, err := protocol.DeviceIDFromString(data["myID"].(string))
				if err != nil {
					log.Println("eventLoop: DeviceIdFromString:", err)
					continue
				}
				p.id = id

				home := data["home"].(string)
				w, err := config.Load(filepath.Join(home, "config.xml"), protocol.LocalDeviceID)
				if err != nil {
					log.Println("eventLoop: Starting:", err)
					continue
				}
				for id := range w.Folders() {
					p.eventMut.Lock()
					p.folders = append(p.folders, id)
					p.eventMut.Unlock()
					notScanned[id] = struct{}{}
				}

			case "StateChanged":
				// When a folder changes to idle, we tick it off by removing
				// it from p.notScanned.

				if !p.startComplete {
					data := ev.Data.(map[string]interface{})
					to := data["to"].(string)
					if to == "idle" {
						folder := data["folder"].(string)
						delete(notScanned, folder)
						if len(notScanned) == 0 {
							p.eventMut.Lock()
							p.startComplete = true
							p.startCompleteCond.Broadcast()
							p.eventMut.Unlock()
						}
					}
				}

			case "LocalIndexUpdated":
				data := ev.Data.(map[string]interface{})
				folder := data["folder"].(string)
				version, _ := data["version"].(json.Number).Int64()
				p.eventMut.Lock()
				m := p.localVersion[folder]
				if m == nil {
					m = make(map[string]int64)
				}
				m[p.id.String()] = version
				p.localVersion[folder] = m
				p.done[folder] = false
				if debug {
					l.Debugf("LocalIndexUpdated %v %v done=false\n\t%+v", p.id, folder, m)
				}
				p.eventMut.Unlock()

			case "RemoteIndexUpdated":
				data := ev.Data.(map[string]interface{})
				device := data["device"].(string)
//.........这里部分代码省略.........

func TestDeviceRename(t *testing.T) {
	ccm := protocol.ClusterConfigMessage{
		ClientName:    "syncthing",
		ClientVersion: "v0.9.4",
	}

	defer os.Remove("tmpconfig.xml")

	rawCfg := config.New(device1)
	rawCfg.Devices = []config.DeviceConfiguration{
		{
			DeviceID: device1,
		},
	}
	cfg := config.Wrap("tmpconfig.xml", rawCfg)

	db, _ := leveldb.Open(storage.NewMemStorage(), nil)
	m := NewModel(cfg, protocol.LocalDeviceID, "device", "syncthing", "dev", db, nil)

	fc := FakeConnection{
		id:          device1,
		requestData: []byte("some data to return"),
	}

	m.AddConnection(Connection{
		&net.TCPConn{},
		fc,
		ConnectionTypeDirectAccept,
	})

	m.ServeBackground()
	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	ccm.DeviceName = "tester"
	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device did not get a name")
	}

	ccm.DeviceName = "tester2"
	m.ClusterConfig(device1, ccm)
	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device name got overwritten")
	}

	cfgw, err := config.Load("tmpconfig.xml", protocol.LocalDeviceID)
	if err != nil {
		t.Error(err)
		return
	}
	if cfgw.Devices()[device1].Name != "tester" {
		t.Errorf("Device name not saved in config")
	}
}

func syncthingMain() {
	// Create a main service manager. We'll add things to this as we go along.
	// We want any logging it does to go through our log system.
	mainSvc := suture.New("main", suture.Spec{
		Log: func(line string) {
			if debugSuture {
				l.Debugln(line)
			}
		},
	})
	mainSvc.ServeBackground()

	// Set a log prefix similar to the ID we will have later on, or early log
	// lines look ugly.
	l.SetPrefix("[start] ")

	if auditEnabled {
		startAuditing(mainSvc)
	}

	if verbose {
		mainSvc.Add(newVerboseSvc())
	}

	// Event subscription for the API; must start early to catch the early events.
	apiSub := events.NewBufferedSubscription(events.Default.Subscribe(events.AllEvents), 1000)

	if len(os.Getenv("GOMAXPROCS")) == 0 {
		runtime.GOMAXPROCS(runtime.NumCPU())
	}

	// Attempt to increase the limit on number of open files to the maximum
	// allowed, in case we have many peers. We don't really care enough to
	// report the error if there is one.
	osutil.MaximizeOpenFileLimit()

	// Ensure that that we have a certificate and key.
	cert, err := tls.LoadX509KeyPair(locations[locCertFile], locations[locKeyFile])
	if err != nil {
		l.Infof("Generating RSA key and certificate for %s...", tlsDefaultCommonName)
		cert, err = tlsutil.NewCertificate(locations[locCertFile], locations[locKeyFile], tlsDefaultCommonName, tlsRSABits)
		if err != nil {
			l.Fatalln(err)
		}
	}

	// We reinitialize the predictable RNG with our device ID, to get a
	// sequence that is always the same but unique to this syncthing instance.
	predictableRandom.Seed(seedFromBytes(cert.Certificate[0]))

	myID = protocol.NewDeviceID(cert.Certificate[0])
	l.SetPrefix(fmt.Sprintf("[%s] ", myID.String()[:5]))

	l.Infoln(LongVersion)
	l.Infoln("My ID:", myID)

	// Emit the Starting event, now that we know who we are.

	events.Default.Log(events.Starting, map[string]string{
		"home": baseDirs["config"],
		"myID": myID.String(),
	})

	// Prepare to be able to save configuration

	cfgFile := locations[locConfigFile]

	var myName string

	// Load the configuration file, if it exists.
	// If it does not, create a template.

	if info, err := os.Stat(cfgFile); err == nil {
		if !info.Mode().IsRegular() {
			l.Fatalln("Config file is not a file?")
		}
		cfg, err = config.Load(cfgFile, myID)
		if err == nil {
			myCfg := cfg.Devices()[myID]
			if myCfg.Name == "" {
				myName, _ = os.Hostname()
			} else {
				myName = myCfg.Name
			}
		} else {
			l.Fatalln("Configuration:", err)
		}
	} else {
		l.Infoln("No config file; starting with empty defaults")
		myName, _ = os.Hostname()
		newCfg := defaultConfig(myName)
		cfg = config.Wrap(cfgFile, newCfg)
		cfg.Save()
		l.Infof("Edit %s to taste or use the GUI\n", cfgFile)
	}

	if cfg.Raw().OriginalVersion != config.CurrentVersion {
		l.Infoln("Archiving a copy of old config file format")
		// Archive a copy
		osutil.Rename(cfgFile, cfgFile+fmt.Sprintf(".v%d", cfg.Raw().OriginalVersion))
//.........这里部分代码省略.........

func TestDeviceRename(t *testing.T) {
	hello := protocol.HelloMessage{
		ClientName:    "syncthing",
		ClientVersion: "v0.9.4",
	}
	defer os.Remove("tmpconfig.xml")

	rawCfg := config.New(device1)
	rawCfg.Devices = []config.DeviceConfiguration{
		{
			DeviceID: device1,
		},
	}
	cfg := config.Wrap("tmpconfig.xml", rawCfg)

	db := db.OpenMemory()
	m := NewModel(cfg, protocol.LocalDeviceID, "device", "syncthing", "dev", db, nil)

	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	conn := Connection{
		&net.TCPConn{},
		&FakeConnection{
			id:          device1,
			requestData: []byte("some data to return"),
		},
		ConnectionTypeDirectAccept,
	}

	m.AddConnection(conn, hello)

	m.ServeBackground()

	if cfg.Devices()[device1].Name != "" {
		t.Errorf("Device already has a name")
	}

	m.Close(device1, protocol.ErrTimeout)
	hello.DeviceName = "tester"
	m.AddConnection(conn, hello)

	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device did not get a name")
	}

	m.Close(device1, protocol.ErrTimeout)
	hello.DeviceName = "tester2"
	m.AddConnection(conn, hello)

	if cfg.Devices()[device1].Name != "tester" {
		t.Errorf("Device name got overwritten")
	}

	cfgw, err := config.Load("tmpconfig.xml", protocol.LocalDeviceID)
	if err != nil {
		t.Error(err)
		return
	}
	if cfgw.Devices()[device1].Name != "tester" {
		t.Errorf("Device name not saved in config")
	}

	m.Close(device1, protocol.ErrTimeout)

	opts := cfg.Options()
	opts.OverwriteNames = true
	cfg.SetOptions(opts)

	hello.DeviceName = "tester2"
	m.AddConnection(conn, hello)

	if cfg.Devices()[device1].Name != "tester2" {
		t.Errorf("Device name not overwritten")
	}
}

func TestOverride(t *testing.T) {
	// Enable "Master" on s1/default
	id, _ := protocol.DeviceIDFromString(id1)
	cfg, _ := config.Load("h1/config.xml", id)
	fld := cfg.Folders()["default"]
	fld.Type = config.FolderTypeSendOnly
	cfg.SetFolder(fld)
	os.Rename("h1/config.xml", "h1/config.xml.orig")
	defer osutil.Rename("h1/config.xml.orig", "h1/config.xml")
	cfg.Save()

	log.Println("Cleaning...")
	err := removeAll("s1", "s2", "h1/index*", "h2/index*")
	if err != nil {
		t.Fatal(err)
	}

	log.Println("Generating files...")
	err = generateFiles("s1", 100, 20, "../LICENSE")
	if err != nil {
		t.Fatal(err)
	}

	fd, err := os.Create("s1/testfile.txt")
	if err != nil {
		t.Fatal(err)
	}
	_, err = fd.WriteString("hello\n")
	if err != nil {
		t.Fatal(err)
	}
	err = fd.Close()
	if err != nil {
		t.Fatal(err)
	}

	expected, err := directoryContents("s1")
	if err != nil {
		t.Fatal(err)
	}

	master := startInstance(t, 1)
	defer checkedStop(t, master)

	slave := startInstance(t, 2)
	defer checkedStop(t, slave)

	log.Println("Syncing...")

	rc.AwaitSync("default", master, slave)

	log.Println("Verifying...")

	actual, err := directoryContents("s2")
	if err != nil {
		t.Fatal(err)
	}
	err = compareDirectoryContents(actual, expected)
	if err != nil {
		t.Fatal(err)
	}

	log.Println("Changing file on slave side...")

	fd, err = os.OpenFile("s2/testfile.txt", os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		t.Fatal(err)
	}
	_, err = fd.WriteString("text added to s2\n")
	if err != nil {
		t.Fatal(err)
	}
	err = fd.Close()
	if err != nil {
		t.Fatal(err)
	}

	if err := slave.Rescan("default"); err != nil {
		t.Fatal(err)
	}

	log.Println("Waiting for index to send...")

	time.Sleep(10 * time.Second)

	log.Println("Hitting Override on master...")

	if _, err := master.Post("/rest/db/override?folder=default", nil); err != nil {
		t.Fatal(err)
	}

	log.Println("Syncing...")

	rc.AwaitSync("default", master, slave)

	// Verify that the override worked

	fd, err = os.Open("s1/testfile.txt")
	if err != nil {
		t.Fatal(err)
//.........这里部分代码省略.........