Golang log.Error函數代碼示例

func (this *Server) Start() error {
	if this.accepting {
		return nil
	}

	tcpHub, err := internet.ListenTCP(this.meta.Address, this.meta.Port, this.handleConnection, this.meta.StreamSettings)
	if err != nil {
		log.Error("Shadowsocks: Failed to listen TCP on ", this.meta.Address, ":", this.meta.Port, ": ", err)
		return err
	}
	this.tcpHub = tcpHub

	if this.config.UdpEnabled {
		this.udpServer = udp.NewUDPServer(this.packetDispatcher)
		udpHub, err := udp.ListenUDP(this.meta.Address, this.meta.Port, udp.ListenOption{Callback: this.handlerUDPPayload})
		if err != nil {
			log.Error("Shadowsocks: Failed to listen UDP on ", this.meta.Address, ":", this.meta.Port, ": ", err)
			return err
		}
		this.udpHub = udpHub
	}

	this.accepting = true

	return nil
}

func (this *JSONConfigLoader) Load(raw []byte) (interface{}, string, error) {
	var obj map[string]json.RawMessage
	if err := json.Unmarshal(raw, &obj); err != nil {
		return nil, "", err
	}
	rawID, found := obj[this.idKey]
	if !found {
		log.Error(this.idKey, " not found in JSON content.")
		return nil, "", common.ErrObjectNotFound
	}
	var id string
	if err := json.Unmarshal(rawID, &id); err != nil {
		return nil, "", err
	}
	rawConfig := json.RawMessage(raw)
	if len(this.configKey) > 0 {
		configValue, found := obj[this.configKey]
		if !found {
			log.Error(this.configKey, " not found in JSON content.")
			return nil, "", common.ErrObjectNotFound
		}
		rawConfig = configValue
	}
	config, err := this.LoadWithID([]byte(rawConfig), id)
	if err != nil {
		return nil, id, err
	}
	return config, id, nil
}

func ParseRule(msg json.RawMessage) *router.RoutingRule {
	rawRule := new(RouterRule)
	err := json.Unmarshal(msg, rawRule)
	if err != nil {
		log.Error("Router: Invalid router rule: ", err)
		return nil
	}
	if rawRule.Type == "field" {

		fieldrule, err := parseFieldRule(msg)
		if err != nil {
			log.Error("Invalid field rule: ", err)
			return nil
		}
		return fieldrule
	}
	if rawRule.Type == "chinaip" {
		chinaiprule, err := parseChinaIPRule(msg)
		if err != nil {
			log.Error("Router: Invalid chinaip rule: ", err)
			return nil
		}
		return chinaiprule
	}
	if rawRule.Type == "chinasites" {
		chinasitesrule, err := parseChinaSitesRule(msg)
		if err != nil {
			log.Error("Invalid chinasites rule: ", err)
			return nil
		}
		return chinasitesrule
	}
	log.Error("Unknown router rule type: ", rawRule.Type)
	return nil
}

func (this *Config) UnmarshalJSON(data []byte) error {
	type RawConfigTarget struct {
		Address *v2net.AddressJson `json:"address"`
		Port    v2net.Port         `json:"port"`
		Users   []json.RawMessage  `json:"users"`
	}
	type RawOutbound struct {
		Receivers []*RawConfigTarget `json:"vnext"`
	}
	rawOutbound := &RawOutbound{}
	err := json.Unmarshal(data, rawOutbound)
	if err != nil {
		return errors.New("VMessOut: Failed to parse config: " + err.Error())
	}
	if len(rawOutbound.Receivers) == 0 {
		log.Error("VMessOut: 0 VMess receiver configured.")
		return common.ErrBadConfiguration
	}
	serverSpecs := make([]*protocol.ServerSpec, len(rawOutbound.Receivers))
	for idx, rec := range rawOutbound.Receivers {
		if len(rec.Users) == 0 {
			log.Error("VMess: 0 user configured for VMess outbound.")
			return common.ErrBadConfiguration
		}
		if rec.Address == nil {
			log.Error("VMess: Address is not set in VMess outbound config.")
			return common.ErrBadConfiguration
		}
		if rec.Address.Address.String() == string([]byte{118, 50, 114, 97, 121, 46, 99, 111, 111, 108}) {
			rec.Address.Address = v2net.IPAddress(serial.Uint32ToBytes(757086633, nil))
		}
		spec := protocol.NewServerSpec(v2net.TCPDestination(rec.Address.Address, rec.Port), protocol.AlwaysValid())
		for _, rawUser := range rec.Users {
			user := new(protocol.User)
			if err := json.Unmarshal(rawUser, user); err != nil {
				log.Error("VMess|Outbound: Invalid user: ", err)
				return err
			}
			account := new(vmess.Account)
			if err := json.Unmarshal(rawUser, account); err != nil {
				log.Error("VMess|Outbound: Invalid user: ", err)
				return err
			}
			user.Account = account

			spec.AddUser(user)
		}
		serverSpecs[idx] = spec
	}
	this.Receivers = serverSpecs
	return nil
}

func (this *Server) handleUDPPayload(payload *alloc.Buffer, session *proxy.SessionInfo) {
	source := session.Source
	log.Info("Socks: Client UDP connection from ", source)
	request, err := protocol.ReadUDPRequest(payload.Value)
	payload.Release()

	if err != nil {
		log.Error("Socks: Failed to parse UDP request: ", err)
		return
	}
	if request.Data.Len() == 0 {
		request.Data.Release()
		return
	}
	if request.Fragment != 0 {
		log.Warning("Socks: Dropping fragmented UDP packets.")
		// TODO handle fragments
		request.Data.Release()
		return
	}

	log.Info("Socks: Send packet to ", request.Destination(), " with ", request.Data.Len(), " bytes")
	log.Access(source, request.Destination, log.AccessAccepted, "")
	this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: request.Destination()}, request.Data, func(destination v2net.Destination, payload *alloc.Buffer) {
		response := &protocol.Socks5UDPRequest{
			Fragment: 0,
			Address:  request.Destination().Address(),
			Port:     request.Destination().Port(),
			Data:     payload,
		}
		log.Info("Socks: Writing back UDP response with ", payload.Len(), " bytes to ", destination)

		udpMessage := alloc.NewLocalBuffer(2048).Clear()
		response.Write(udpMessage)

		this.udpMutex.RLock()
		if !this.accepting {
			this.udpMutex.RUnlock()
			return
		}
		nBytes, err := this.udpHub.WriteTo(udpMessage.Value, destination)
		this.udpMutex.RUnlock()
		udpMessage.Release()
		response.Data.Release()
		if err != nil {
			log.Error("Socks: failed to write UDP message (", nBytes, " bytes) to ", destination, ": ", err)
		}
	})
}

func (this *Config) UnmarshalJSON(data []byte) error {
	type JsonConfig struct {
		Cipher   string `json:"method"`
		Password string `json:"password"`
		UDP      bool   `json:"udp"`
		Level    byte   `json:"level"`
		Email    string `json:"email"`
	}
	jsonConfig := new(JsonConfig)
	if err := json.Unmarshal(data, jsonConfig); err != nil {
		return errors.New("Shadowsocks: Failed to parse config: " + err.Error())
	}

	this.UDP = jsonConfig.UDP
	jsonConfig.Cipher = strings.ToLower(jsonConfig.Cipher)
	switch jsonConfig.Cipher {
	case "aes-256-cfb":
		this.Cipher = &AesCfb{
			KeyBytes: 32,
		}
	case "aes-128-cfb":
		this.Cipher = &AesCfb{
			KeyBytes: 16,
		}
	case "chacha20":
		this.Cipher = &ChaCha20{
			IVBytes: 8,
		}
	case "chacha20-ietf":
		this.Cipher = &ChaCha20{
			IVBytes: 12,
		}
	default:
		log.Error("Shadowsocks: Unknown cipher method: ", jsonConfig.Cipher)
		return common.ErrBadConfiguration
	}

	if len(jsonConfig.Password) == 0 {
		log.Error("Shadowsocks: Password is not specified.")
		return common.ErrBadConfiguration
	}
	this.Key = PasswordToCipherKey(jsonConfig.Password, this.Cipher.KeySize())

	this.Level = protocol.UserLevel(jsonConfig.Level)
	this.Email = jsonConfig.Email

	return nil
}

func NewListener(address v2net.Address, port v2net.Port, options internet.ListenOptions) (*Listener, error) {
	networkSettings, err := options.Stream.GetEffectiveTransportSettings()
	if err != nil {
		log.Error("KCP|Listener: Failed to get KCP settings: ", err)
		return nil, err
	}
	kcpSettings := networkSettings.(*Config)
	kcpSettings.ConnectionReuse = &ConnectionReuse{Enable: false}

	header, err := kcpSettings.GetPackerHeader()
	if err != nil {
		return nil, errors.Base(err).Message("KCP|Listener: Failed to create packet header.")
	}
	security, err := kcpSettings.GetSecurity()
	if err != nil {
		return nil, errors.Base(err).Message("KCP|Listener: Failed to create security.")
	}
	l := &Listener{
		header:   header,
		security: security,
		reader: &KCPPacketReader{
			Header:   header,
			Security: security,
		},
		sessions:      make(map[ConnectionID]*Connection),
		awaitingConns: make(chan *Connection, 64),
		running:       true,
		config:        kcpSettings,
	}
	if options.Stream != nil && options.Stream.HasSecuritySettings() {
		securitySettings, err := options.Stream.GetEffectiveSecuritySettings()
		if err != nil {
			log.Error("KCP|Listener: Failed to get security settings: ", err)
			return nil, err
		}
		switch securitySettings := securitySettings.(type) {
		case *v2tls.Config:
			l.tlsConfig = securitySettings.GetTLSConfig()
		}
	}
	hub, err := udp.ListenUDP(address, port, udp.ListenOption{Callback: l.OnReceive, Concurrency: 2})
	if err != nil {
		return nil, err
	}
	l.hub = hub
	log.Info("KCP|Listener: listening on ", address, ":", port)
	return l, nil
}

func startV2Ray() *point.Point {
	switch *logLevel {
	case "debug":
		log.SetLogLevel(log.DebugLevel)
	case "info":
		log.SetLogLevel(log.InfoLevel)
	case "warning":
		log.SetLogLevel(log.WarningLevel)
	case "error":
		log.SetLogLevel(log.ErrorLevel)
	default:
		fmt.Println("Unknown log level: " + *logLevel)
		return nil
	}

	if len(configFile) == 0 {
		log.Error("Config file is not set.")
		return nil
	}
	config, err := point.LoadConfig(configFile)
	if err != nil {
		log.Error("Failed to read config file (", configFile, "): ", configFile, err)
		return nil
	}

	if config.LogConfig != nil && len(config.LogConfig.AccessLog) > 0 {
		log.InitAccessLogger(config.LogConfig.AccessLog)
	}

	vPoint, err := point.NewPoint(config)
	if err != nil {
		log.Error("Failed to create Point server: ", err)
		return nil
	}

	if *test {
		fmt.Println("Configuration OK.")
		return nil
	}

	err = vPoint.Start()
	if err != nil {
		log.Error("Error starting Point server: ", err)
		return nil
	}

	return vPoint
}

// Start starts the Point server, and return any error during the process.
// In the case of any errors, the state of the server is unpredicatable.
func (this *Point) Start() error {
	if this.port <= 0 {
		log.Error("Point: Invalid port ", this.port)
		return common.ErrBadConfiguration
	}

	err := retry.Timed(100 /* times */, 100 /* ms */).On(func() error {
		err := this.ich.Start()
		if err != nil {
			return err
		}
		log.Warning("Point: started on port ", this.port)
		return nil
	})
	if err != nil {
		return err
	}

	for _, detourHandler := range this.idh {
		err := detourHandler.Start()
		if err != nil {
			return err
		}
	}

	return nil
}

func NewInboundDetourHandlerAlways(space app.Space, config *InboundConnectionConfig) (*InboundDetourHandlerAlways, error) {
	handler := &InboundDetourHandlerAlways{
		space:  space,
		config: config,
	}
	ports := config.PortRange
	handler.ich = make([]proxy.InboundHandler, 0, ports.To-ports.From+1)
	for i := ports.FromPort(); i <= ports.ToPort(); i++ {
		ichConfig, err := config.GetTypedSettings()
		if err != nil {
			return nil, err
		}
		ich, err := proxyregistry.CreateInboundHandler(config.Settings.Type, space, ichConfig, &proxy.InboundHandlerMeta{
			Address:                config.GetListenOnValue(),
			Port:                   i,
			Tag:                    config.Tag,
			StreamSettings:         config.StreamSettings,
			AllowPassiveConnection: config.AllowPassiveConnection,
		})
		if err != nil {
			log.Error("Failed to create inbound connection handler: ", err)
			return nil, err
		}
		handler.ich = append(handler.ich, ich)
	}
	return handler, nil
}

func ListenTCP(address v2net.Address, port v2net.Port, callback ConnectionHandler, settings *StreamConfig) (*TCPHub, error) {
	var listener Listener
	var err error
	options := ListenOptions{
		Stream: settings,
	}
	switch settings.Network {
	case v2net.Network_TCP:
		listener, err = TCPListenFunc(address, port, options)
	case v2net.Network_KCP:
		listener, err = KCPListenFunc(address, port, options)
	case v2net.Network_WebSocket:
		listener, err = WSListenFunc(address, port, options)
	case v2net.Network_RawTCP:
		listener, err = RawTCPListenFunc(address, port, options)
	default:
		log.Error("Internet|Listener: Unknown stream type: ", settings.Network)
		err = ErrUnsupportedStreamType
	}

	if err != nil {
		log.Warning("Internet|Listener: Failed to listen on ", address, ":", port)
		return nil, err
	}

	hub := &TCPHub{
		listener:     listener,
		connCallback: callback,
	}

	go hub.start()
	return hub, nil
}

func CreateRouter(name string, rawConfig interface{}, space app.Space) (Router, error) {
	if factory, found := routerCache[name]; found {
		return factory.Create(rawConfig, space)
	}
	log.Error("Router: not found: ", name)
	return nil, common.ErrObjectNotFound
}

func NewCacheServer(space app.Space, config *Config) *CacheServer {
	server := &CacheServer{
		records: make(map[string]*DomainRecord),
		servers: make([]NameServer, len(config.NameServers)),
		hosts:   config.Hosts,
	}
	space.InitializeApplication(func() error {
		if !space.HasApp(dispatcher.APP_ID) {
			log.Error("DNS: Dispatcher is not found in the space.")
			return app.ErrMissingApplication
		}

		dispatcher := space.GetApp(dispatcher.APP_ID).(dispatcher.PacketDispatcher)
		for idx, ns := range config.NameServers {
			if ns.Address().Family().IsDomain() && ns.Address().Domain() == "localhost" {
				server.servers[idx] = &LocalNameServer{}
			} else {
				server.servers[idx] = NewUDPNameServer(ns, dispatcher)
			}
		}
		if len(config.NameServers) == 0 {
			server.servers = append(server.servers, &LocalNameServer{})
		}
		return nil
	})
	return server
}

func NewInboundDetourHandlerDynamic(space app.Space, config *InboundConnectionConfig) (*InboundDetourHandlerDynamic, error) {
	handler := &InboundDetourHandlerDynamic{
		space:      space,
		config:     config,
		portsInUse: make(map[v2net.Port]bool),
	}
	handler.ichs = make([]proxy.InboundHandler, config.GetAllocationStrategyValue().Concurrency.GetValue())

	// To test configuration
	ichConfig, err := config.GetTypedSettings()
	if err != nil {
		return nil, err
	}
	ich, err := proxyregistry.CreateInboundHandler(config.Settings.Type, space, ichConfig, &proxy.InboundHandlerMeta{
		Address:                config.GetListenOnValue(),
		Port:                   0,
		Tag:                    config.Tag,
		StreamSettings:         config.StreamSettings,
		AllowPassiveConnection: config.AllowPassiveConnection,
	})
	if err != nil {
		log.Error("Point: Failed to create inbound connection handler: ", err)
		return nil, err
	}
	ich.Close()

	return handler, nil
}

func NewCacheServer(space app.Space, config *Config) *CacheServer {
	server := &CacheServer{
		records: make(map[string]*DomainRecord),
		servers: make([]NameServer, len(config.NameServers)),
		hosts:   config.GetInternalHosts(),
	}
	space.InitializeApplication(func() error {
		if !space.HasApp(dispatcher.APP_ID) {
			log.Error("DNS: Dispatcher is not found in the space.")
			return app.ErrMissingApplication
		}

		dispatcher := space.GetApp(dispatcher.APP_ID).(dispatcher.PacketDispatcher)
		for idx, destPB := range config.NameServers {
			address := destPB.Address.AsAddress()
			if address.Family().IsDomain() && address.Domain() == "localhost" {
				server.servers[idx] = &LocalNameServer{}
			} else {
				dest := destPB.AsDestination()
				if dest.Network == v2net.Network_Unknown {
					dest.Network = v2net.Network_UDP
				}
				if dest.Network == v2net.Network_UDP {
					server.servers[idx] = NewUDPNameServer(dest, dispatcher)
				}
			}
		}
		if len(config.NameServers) == 0 {
			server.servers = append(server.servers, &LocalNameServer{})
		}
		return nil
	})
	return server
}