Golang toml.Decode函數代碼示例

func NewConfigFile() (*ConfigFile, error) {
	source, err := ioutil.ReadFile(CLIConfig.ConfigFileLocation)

	if err != nil {
		if CLIConfig.IsPiping || CLIConfig.IsNotifying {
			return &ConfigFile{
				Data:      DataConfig{},
				Graphite:  GraphiteConfig{},
				JobsField: []Job{},
			}, nil
		}

		return nil, errors.New(fmt.Sprintf("Unable to open configuration file at %s. Did you use --config to specify the right path?\n\n", CLIConfig.ConfigFileLocation))
	}

	result := &ConfigFile{}

	_, err = toml.Decode(string(source), result)

	for _, job := range result.FlowField {
		result.JobsField = append(result.JobsField, job)
	}

	return result, err
}

// Retuns the configuration data into a generic object for for us.
func (cr *ConfigReader) Export() (interface{}, error) {
	var config interface{}
	buf := new(bytes.Buffer)
	buf.ReadFrom(cr.reader)

	switch cr.Format {
	case "yaml":
		if err := yaml.Unmarshal(buf.Bytes(), &config); err != nil {
			jww.ERROR.Fatalf("Error parsing config: %s", err)
		}

	case "json":
		if err := json.Unmarshal(buf.Bytes(), &config); err != nil {
			jww.ERROR.Fatalf("Error parsing config: %s", err)
		}

	case "toml":
		if _, err := toml.Decode(buf.String(), &config); err != nil {
			jww.ERROR.Fatalf("Error parsing config: %s", err)
		}
	default:
		return nil, err.UnsupportedConfigError(cr.Format)
	}

	return config, nil
}

func main() {
	configFile := flag.String("config", "benchmark_config.sample.toml", "Config file")

	runtime.GOMAXPROCS(runtime.NumCPU())
	flag.Parse()

	data, err := ioutil.ReadFile(*configFile)
	if err != nil {
		panic(err)
	}
	var conf benchmarkConfig
	if _, err := toml.Decode(string(data), &conf); err != nil {
		panic(err)
	}
	logFile, err := os.OpenFile(conf.LogFile, os.O_RDWR|os.O_CREATE, 0660)
	if err != nil {
		panic(fmt.Sprintf("Error opening log file \"%s\": %s", conf.LogFile, err))
	}
	conf.Log = logFile
	defer logFile.Close()
	fmt.Println("Logging benchmark results to ", conf.LogFile)
	logFile.WriteString("Starting benchmark run...\n")

	harness := NewBenchmarkHarness(&conf)

	startTime := time.Now()
	harness.Run()
	elapsed := time.Now().Sub(startTime)

	message := fmt.Sprintf("Finished in %.3f seconds\n", elapsed.Seconds())
	fmt.Printf(message)
	logFile.WriteString(message)
}

func ParseDbConfig(path string) (*DbConfig, error) {
	conf := &DbConfig{}
	content, err := ioutil.ReadFile(path + "/config.toml")
	if err != nil {
		return nil, errors.New(fmt.Sprintf("Error while reading config.toml configuration: %v", err))
	}
	_, err = toml.Decode(string(content), &conf)
	if err != nil {
		return nil, err
	}
	if conf.User == "" {
		conf.User = "postgres"
	}
	if conf.Host == "" {
		conf.Host = "127.0.0.1"
	}
	if conf.Port == 0 {
		conf.Port = 5432
	}
	if conf.SslMode == "" {
		conf.SslMode = "disable"
	}
	return conf, nil

}

func TestConfig_Parse(t *testing.T) {
	// Parse configuration.
	var c httpd.Config
	if _, err := toml.Decode(`
enabled = true
bind-address = ":8080"
auth-enabled = true
log-enabled = true
write-tracing = true
pprof-enabled = true
https-enabled = true
https-certificate = "/dev/null"
`, &c); err != nil {
		t.Fatal(err)
	}

	// Validate configuration.
	if c.Enabled != true {
		t.Fatalf("unexpected enabled: %v", c.Enabled)
	} else if c.BindAddress != ":8080" {
		t.Fatalf("unexpected bind address: %s", c.BindAddress)
	} else if c.AuthEnabled != true {
		t.Fatalf("unexpected auth enabled: %v", c.AuthEnabled)
	} else if c.LogEnabled != true {
		t.Fatalf("unexpected log enabled: %v", c.LogEnabled)
	} else if c.WriteTracing != true {
		t.Fatalf("unexpected write tracing: %v", c.WriteTracing)
	} else if c.PprofEnabled != true {
		t.Fatalf("unexpected pprof enabled: %v", c.PprofEnabled)
	} else if c.HTTPSEnabled != true {
		t.Fatalf("unexpected https enabled: %v", c.HTTPSEnabled)
	} else if c.HTTPSCertificate != "/dev/null" {
		t.Fatalf("unexpected https certificate: %v", c.HTTPSCertificate)
	}
}

func TestConfig_Parse(t *testing.T) {
	// Parse configuration.
	var c httpd.Config
	if _, err := toml.Decode(`
enabled = true
bind-address = ":8080"
auth-enabled = true
log-enabled = true
write-tracing = true
pprof-enabled = true
max-connections = 5000
`, &c); err != nil {
		t.Fatal(err)
	}

	// Validate configuration.
	if c.Enabled != true {
		t.Fatalf("unexpected enabled: %v", c.Enabled)
	} else if c.BindAddress != ":8080" {
		t.Fatalf("unexpected bind address: %s", c.BindAddress)
	} else if c.AuthEnabled != true {
		t.Fatalf("unexpected auth enabled: %v", c.AuthEnabled)
	} else if c.LogEnabled != true {
		t.Fatalf("unexpected log enabled: %v", c.LogEnabled)
	} else if c.WriteTracing != true {
		t.Fatalf("unexpected write tracing: %v", c.WriteTracing)
	} else if c.PprofEnabled != true {
		t.Fatalf("unexpected pprof enabled: %v", c.PprofEnabled)
	} else if c.MaxConnections != 5000 {
		t.Fatalf("unexpected max connections: %v", c.MaxConnections)
	}
}

func (page *Page) handleTomlMetaData(datum []byte) (interface{}, error) {
	m := map[string]interface{}{}
	if _, err := toml.Decode(string(datum), &m); err != nil {
		return m, fmt.Errorf("Invalid TOML in %s \nError parsing page meta data: %s", page.FileName, err)
	}
	return m, nil
}

// NewConfig reads configuration from path. The format is deductted from file extension
//	* .json    - is decoded as json
//	* .yml     - is decoded as yaml
//	* .toml    - is decoded as toml
func NewConfig(path string) (*Config, error) {
	_, err := os.Stat(path)
	if err != nil {
		return nil, err
	}

	data, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}

	cfg := &Config{}
	switch filepath.Ext(path) {
	case ".json":
		jerr := json.Unmarshal(data, cfg)
		if jerr != nil {
			return nil, jerr
		}
	case ".toml":
		_, terr := toml.Decode(string(data), cfg)
		if terr != nil {
			return nil, terr
		}
	case ".yml":
		yerr := yaml.Unmarshal(data, cfg)
		if yerr != nil {
			return nil, yerr
		}

	default:
		return nil, errors.New("utron: config file not supported")
	}
	return cfg, nil
}

// 解析toml字符串
func (config *Configuration) FromToml(data string) error {
	config.mutex.Lock()
	defer config.mutex.Unlock()

	_, err := toml.Decode(data, &config.parameters)
	return err
}

func parseTomlConfiguration(filename string) (*Configuration, error) {
	body, err := ioutil.ReadFile(filename)
	if err != nil {
		return nil, err
	}
	tomlConfiguration := &TomlConfiguration{}
	_, err = toml.Decode(string(body), tomlConfiguration)
	if err != nil {
		return nil, err
	}

	config := &Configuration{
		AdminHttpPort:  tomlConfiguration.Admin.Port,
		AdminAssetsDir: tomlConfiguration.Admin.Assets,
		ApiHttpPort:    tomlConfiguration.Api.Port,
		RaftServerPort: tomlConfiguration.Raft.Port,
		RaftDir:        tomlConfiguration.Raft.Dir,
		ProtobufPort:   tomlConfiguration.Cluster.ProtobufPort,
		SeedServers:    tomlConfiguration.Cluster.SeedServers,
		DataDir:        tomlConfiguration.Storage.Dir,
		LogFile:        tomlConfiguration.Logging.File,
		LogLevel:       tomlConfiguration.Logging.Level,
		Hostname:       tomlConfiguration.Hostname,
	}

	return config, nil
}

func TestConfig_Parse(t *testing.T) {
	// Parse configuration.
	var c opentsdb.Config
	if _, err := toml.Decode(`
enabled = true
bind-address = ":9000"
database = "xxx"
consistency-level ="all"
tls-enabled = true
certificate = "/etc/ssl/cert.pem"
log-point-errors = true
`, &c); err != nil {
		t.Fatal(err)
	}

	// Validate configuration.
	if c.Enabled != true {
		t.Fatalf("unexpected enabled: %v", c.Enabled)
	} else if c.BindAddress != ":9000" {
		t.Fatalf("unexpected bind address: %s", c.BindAddress)
	} else if c.Database != "xxx" {
		t.Fatalf("unexpected database: %s", c.Database)
	} else if c.ConsistencyLevel != "all" {
		t.Fatalf("unexpected consistency-level: %s", c.ConsistencyLevel)
	} else if c.TLSEnabled != true {
		t.Fatalf("unexpected tls-enabled: %v", c.TLSEnabled)
	} else if c.Certificate != "/etc/ssl/cert.pem" {
		t.Fatalf("unexpected certificate: %s", c.Certificate)
	} else if !c.LogPointErrors {
		t.Fatalf("unexpected log-point-errors: %v", c.LogPointErrors)
	}
}

// Ensure the configuration can be parsed.
func TestConfig_Parse_EnvOverride(t *testing.T) {
	// Parse configuration.
	var c run.Config
	if _, err := toml.Decode(`
[replay]
dir = "/tmp/replay"

[task]
dir = "/tmp/task"
`, &c); err != nil {
		t.Fatal(err)
	}

	if err := os.Setenv("KAPACITOR_REPLAY_DIR", "/var/lib/kapacitor/replay"); err != nil {
		t.Fatalf("failed to set env var: %v", err)
	}

	if err := os.Setenv("KAPACITOR_TASK_DIR", "/var/lib/kapacitor/task"); err != nil {
		t.Fatalf("failed to set env var: %v", err)
	}

	if err := c.ApplyEnvOverrides(); err != nil {
		t.Fatalf("failed to apply env overrides: %v", err)
	}

	// Validate configuration.
	if c.Replay.Dir != "/var/lib/kapacitor/replay" {
		t.Fatalf("unexpected replay dir: %s", c.Replay.Dir)
	} else if c.Task.Dir != "/var/lib/kapacitor/task" {
		t.Fatalf("unexpected task dir: %s", c.Task.Dir)
	}
}

// LoadConfig initializes the confd configuration by first setting defaults,
// then overriding setting from the confd config file, and finally overriding
// settings from flags set on the command line.
// It returns an error if any.
func LoadConfig(path string) error {
	setDefaults()
	if path == "" {
		log.Warning("Skipping confd config file.")
	} else {
		log.Debug("Loading " + path)

		configBytes, err := ioutil.ReadFile(path)
		if err != nil {
			return err
		}

		_, err = toml.Decode(string(configBytes), &config)
		if err != nil {
			return err
		}
	}
	processFlags()
	if !isValidateEtcdScheme(config.Confd.EtcdScheme) {
		return errors.New("Invalid etcd scheme: " + config.Confd.EtcdScheme)
	}
	err := setEtcdHosts()
	if err != nil {
		return err
	}
	return nil
}

// ParseConfig parses a configuration string into a config object.
func ParseConfig(s string) (*Config, error) {
	c := NewConfig()
	if _, err := toml.Decode(s, &c); err != nil {
		return nil, err
	}
	return c, nil
}

func (p *BaseProvider) getConfiguration(defaultTemplateFile string, funcMap template.FuncMap, templateObjects interface{}) (*types.Configuration, error) {
	var (
		buf []byte
		err error
	)
	configuration := new(types.Configuration)
	tmpl := template.New(p.Filename).Funcs(funcMap)
	if len(p.Filename) > 0 {
		buf, err = ioutil.ReadFile(p.Filename)
		if err != nil {
			return nil, err
		}
	} else {
		buf, err = autogen.Asset(defaultTemplateFile)
		if err != nil {
			return nil, err
		}
	}
	_, err = tmpl.Parse(string(buf))
	if err != nil {
		return nil, err
	}

	var buffer bytes.Buffer
	err = tmpl.Execute(&buffer, templateObjects)
	if err != nil {
		return nil, err
	}

	if _, err := toml.Decode(buffer.String(), configuration); err != nil {
		return nil, err
	}
	return configuration, nil
}