package config import ( "bytes" "encoding/json" "errors" "io/ioutil" "log" "os" "sync" "github.com/beego/goyaml2" ) // YAMLConfig is a yaml config parser and implements Config interface. type YAMLConfig struct { } // Parse returns a ConfigContainer with parsed yaml config map. func (yaml *YAMLConfig) Parse(filename string) (ConfigContainer, error) { y := &YAMLConfigContainer{ data: make(map[string]interface{}), } cnf, err := ReadYmlReader(filename) if err != nil { return nil, err } y.data = cnf return y, nil } // Read yaml file to map. // if json like, use json package, unless goyaml2 package. func ReadYmlReader(path string) (cnf map[string]interface{}, err error) { err = nil f, err := os.Open(path) if err != nil { return } defer f.Close() err = nil buf, err := ioutil.ReadAll(f) if err != nil || len(buf) < 3 { return } if string(buf[0:1]) == "{" { log.Println("Look lile a Json, try it") err = json.Unmarshal(buf, &cnf) if err == nil { log.Println("It is Json Map") return } } _map, _err := goyaml2.Read(bytes.NewBuffer(buf)) if _err != nil { log.Println("Goyaml2 ERR>", string(buf), _err) //err = goyaml.Unmarshal(buf, &cnf) err = _err return } if _map == nil { log.Println("Goyaml2 output nil? Pls report bug\n" + string(buf)) } cnf, ok := _map.(map[string]interface{}) if !ok { log.Println("Not a Map? >> ", string(buf), _map) cnf = nil } return } // A Config represents the yaml configuration. type YAMLConfigContainer struct { data map[string]interface{} sync.Mutex } // Bool returns the boolean value for a given key. func (c *YAMLConfigContainer) Bool(key string) (bool, error) { if v, ok := c.data[key].(bool); ok { return v, nil } return false, errors.New("not bool value") } // Int returns the integer value for a given key. func (c *YAMLConfigContainer) Int(key string) (int, error) { if v, ok := c.data[key].(int64); ok { return int(v), nil } return 0, errors.New("not int value") } // Int64 returns the int64 value for a given key. func (c *YAMLConfigContainer) Int64(key string) (int64, error) { if v, ok := c.data[key].(int64); ok { return v, nil } return 0, errors.New("not bool value") } // Float returns the float value for a given key. func (c *YAMLConfigContainer) Float(key string) (float64, error) { if v, ok := c.data[key].(float64); ok { return v, nil } return 0.0, errors.New("not float64 value") } // String returns the string value for a given key. func (c *YAMLConfigContainer) String(key string) string { if v, ok := c.data[key].(string); ok { return v } return "" } // WriteValue writes a new value for key. func (c *YAMLConfigContainer) Set(key, val string) error { c.Lock() defer c.Unlock() c.data[key] = val return nil } // DIY returns the raw value by a given key. func (c *YAMLConfigContainer) DIY(key string) (v interface{}, err error) { if v, ok := c.data[key]; ok { return v, nil } return nil, errors.New("not exist key") } func init() { Register("yaml", &YAMLConfig{}) }