beego: move dependency module to sub package

config/yaml/yaml.go

@@ -0,0 +1,144 @@
+package config
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+	"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 ""
+}
+
+// Strings returns the []string value for a given key.
+func (c *YAMLConfigContainer) Strings(key string) []string {
+	return strings.Split(c.String(key), ";")
+}
+
+// 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{})
+}