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Beego/config/yaml/yaml.go
astaxie 2820f630c8 config: add more method
DefaultString(key string, defaultval string) string      // support
section::key type in key string when using ini and json type;
Int,Int64,Bool,Float,DIY are same.
	DefaultStrings(key string, defaultval []string) []string //get string
slice
	DefaultInt(key string, defaultval int) int
	DefaultInt64(key string, defaultval int64) int64
	DefaultBool(key string, defaultval bool) bool
	DefaultFloat(key string, defaultval float64) float64
	DIY(key string) (interface{}, error)
	GetSection(section string) (map[string]string, error)
	SaveConfigFile(filename string) error
2014-08-07 17:24:21 +08:00

246 lines
5.8 KiB
Go

// Beego (http://beego.me/)
//
// @description beego is an open-source, high-performance web framework for the Go programming language.
//
// @link http://github.com/astaxie/beego for the canonical source repository
//
// @license http://github.com/astaxie/beego/blob/master/LICENSE
//
// @authors astaxie
package yaml
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"os"
"path"
"strings"
"sync"
"time"
"github.com/astaxie/beego/config"
"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) (y config.ConfigContainer, err error) {
cnf, err := ReadYmlReader(filename)
if err != nil {
return
}
y = &YAMLConfigContainer{
data: cnf,
}
return
}
func (yaml *YAMLConfig) ParseData(data []byte) (config.ConfigContainer, error) {
// Save memory data to temporary file
tmpName := path.Join(os.TempDir(), "beego", fmt.Sprintf("%d", time.Now().Nanosecond()))
os.MkdirAll(path.Dir(tmpName), os.ModePerm)
if err := ioutil.WriteFile(tmpName, data, 0655); err != nil {
return nil, err
}
return yaml.Parse(tmpName)
}
// Read yaml file to map.
// if json like, use json package, unless goyaml2 package.
func ReadYmlReader(path string) (cnf map[string]interface{}, err error) {
f, err := os.Open(path)
if err != nil {
return
}
defer f.Close()
buf, err := ioutil.ReadAll(f)
if err != nil || len(buf) < 3 {
return
}
if string(buf[0:1]) == "{" {
log.Println("Look like a Json, try json umarshal")
err = json.Unmarshal(buf, &cnf)
if err == nil {
log.Println("It is Json Map")
return
}
}
data, err := goyaml2.Read(bytes.NewBuffer(buf))
if err != nil {
log.Println("Goyaml2 ERR>", string(buf), err)
return
}
if data == nil {
log.Println("Goyaml2 output nil? Pls report bug\n" + string(buf))
return
}
cnf, ok := data.(map[string]interface{})
if !ok {
log.Println("Not a Map? >> ", string(buf), data)
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")
}
// DefaultBool return the bool value if has no error
// otherwise return the defaultval
func (c *YAMLConfigContainer) DefaultBool(key string, defaultval bool) bool {
if v, err := c.Bool(key); err != nil {
return defaultval
} else {
return v
}
}
// 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")
}
// DefaultInt returns the integer value for a given key.
// if err != nil return defaltval
func (c *YAMLConfigContainer) DefaultInt(key string, defaultval int) int {
if v, err := c.Int(key); err != nil {
return defaultval
} else {
return v
}
}
// 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")
}
// DefaultInt64 returns the int64 value for a given key.
// if err != nil return defaltval
func (c *YAMLConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
if v, err := c.Int64(key); err != nil {
return defaultval
} else {
return v
}
}
// 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")
}
// DefaultFloat returns the float64 value for a given key.
// if err != nil return defaltval
func (c *YAMLConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
if v, err := c.Float(key); err != nil {
return defaultval
} else {
return v
}
}
// 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 ""
}
// DefaultString returns the string value for a given key.
// if err != nil return defaltval
func (c *YAMLConfigContainer) DefaultString(key string, defaultval string) string {
if v := c.String(key); v == "" {
return defaultval
} else {
return v
}
}
// Strings returns the []string value for a given key.
func (c *YAMLConfigContainer) Strings(key string) []string {
return strings.Split(c.String(key), ";")
}
// DefaultStrings returns the []string value for a given key.
// if err != nil return defaltval
func (c *YAMLConfigContainer) DefaultStrings(key string, defaultval []string) []string {
if v := c.Strings(key); len(v) == 0 {
return defaultval
} else {
return v
}
}
// GetSection returns map for the given section
func (c *YAMLConfigContainer) GetSection(section string) (map[string]string, error) {
if v, ok := c.data[section]; ok {
return v.(map[string]string), nil
} else {
return nil, errors.New("not exist setction")
}
}
// SaveConfigFile save the config into file
func (c *YAMLConfigContainer) SaveConfigFile(filename string) (err error) {
// Write configuration file by filename.
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
err = goyaml2.Write(f, c.data)
return err
}
// 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() {
config.Register("yaml", &YAMLConfig{})
}