mirror of
https://github.com/astaxie/beego.git
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180 lines
3.9 KiB
Go
180 lines
3.9 KiB
Go
// Beego (http://beego.me/)
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// @description beego is an open-source, high-performance web framework for the Go programming language.
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// @link http://github.com/astaxie/beego for the canonical source repository
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// @license http://github.com/astaxie/beego/blob/master/LICENSE
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// @authors astaxie
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package config
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import (
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"encoding/json"
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"errors"
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"io/ioutil"
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"os"
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"strings"
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"sync"
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)
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// JsonConfig is a json config parser and implements Config interface.
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type JsonConfig struct {
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}
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// Parse returns a ConfigContainer with parsed json config map.
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func (js *JsonConfig) Parse(filename string) (ConfigContainer, error) {
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file, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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x := &JsonConfigContainer{
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data: make(map[string]interface{}),
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}
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content, err := ioutil.ReadAll(file)
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if err != nil {
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return nil, err
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}
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err = json.Unmarshal(content, &x.data)
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if err != nil {
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var wrappingArray []interface{}
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err2 := json.Unmarshal(content, &wrappingArray)
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if err2 != nil {
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return nil, err
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}
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x.data["rootArray"] = wrappingArray
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}
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return x, nil
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}
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// A Config represents the json configuration.
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// Only when get value, support key as section:name type.
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type JsonConfigContainer struct {
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data map[string]interface{}
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sync.RWMutex
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}
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// Bool returns the boolean value for a given key.
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func (c *JsonConfigContainer) Bool(key string) (bool, error) {
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val := c.getdata(key)
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if val != nil {
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if v, ok := val.(bool); ok {
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return v, nil
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} else {
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return false, errors.New("not bool value")
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}
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} else {
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return false, errors.New("not exist key:" + key)
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}
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}
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// Int returns the integer value for a given key.
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func (c *JsonConfigContainer) Int(key string) (int, error) {
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val := c.getdata(key)
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if val != nil {
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if v, ok := val.(float64); ok {
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return int(v), nil
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} else {
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return 0, errors.New("not int value")
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}
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} else {
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return 0, errors.New("not exist key:" + key)
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}
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}
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// Int64 returns the int64 value for a given key.
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func (c *JsonConfigContainer) Int64(key string) (int64, error) {
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val := c.getdata(key)
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if val != nil {
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if v, ok := val.(float64); ok {
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return int64(v), nil
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} else {
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return 0, errors.New("not int64 value")
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}
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} else {
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return 0, errors.New("not exist key:" + key)
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}
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}
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// Float returns the float value for a given key.
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func (c *JsonConfigContainer) Float(key string) (float64, error) {
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val := c.getdata(key)
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if val != nil {
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if v, ok := val.(float64); ok {
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return v, nil
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} else {
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return 0.0, errors.New("not float64 value")
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}
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} else {
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return 0.0, errors.New("not exist key:" + key)
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}
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}
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// String returns the string value for a given key.
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func (c *JsonConfigContainer) String(key string) string {
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val := c.getdata(key)
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if val != nil {
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if v, ok := val.(string); ok {
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return v
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} else {
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return ""
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}
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} else {
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return ""
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}
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}
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// Strings returns the []string value for a given key.
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func (c *JsonConfigContainer) Strings(key string) []string {
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return strings.Split(c.String(key), ";")
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}
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// WriteValue writes a new value for key.
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func (c *JsonConfigContainer) Set(key, val string) error {
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c.Lock()
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defer c.Unlock()
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c.data[key] = val
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return nil
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}
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// DIY returns the raw value by a given key.
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func (c *JsonConfigContainer) DIY(key string) (v interface{}, err error) {
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val := c.getdata(key)
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if val != nil {
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return val, nil
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} else {
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return nil, errors.New("not exist key")
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}
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}
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// section.key or key
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func (c *JsonConfigContainer) getdata(key string) interface{} {
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c.RLock()
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defer c.RUnlock()
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if len(key) == 0 {
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return nil
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}
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sectionkey := strings.Split(key, "::")
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if len(sectionkey) >= 2 {
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cruval, ok := c.data[sectionkey[0]]
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if !ok {
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return nil
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}
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for _, key := range sectionkey[1:] {
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if v, ok := cruval.(map[string]interface{}); !ok {
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return nil
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} else if cruval, ok = v[key]; !ok {
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return nil
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}
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}
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return cruval
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} else {
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if v, ok := c.data[key]; ok {
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return v
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}
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}
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return nil
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}
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func init() {
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Register("json", &JsonConfig{})
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}
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