mirror of
https://github.com/astaxie/beego.git
synced 2024-11-22 19:50:56 +00:00
314 lines
8.1 KiB
Go
314 lines
8.1 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package json
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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"sync"
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"github.com/mitchellh/mapstructure"
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"github.com/astaxie/beego/core/config"
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"github.com/astaxie/beego/core/logs"
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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) (config.Configer, 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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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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return js.ParseData(content)
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}
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// ParseData returns a ConfigContainer with json string
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func (js *JSONConfig) ParseData(data []byte) (config.Configer, error) {
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x := &JSONConfigContainer{
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data: make(map[string]interface{}),
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}
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err := json.Unmarshal(data, &x.data)
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if err != nil {
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var wrappingArray []interface{}
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err2 := json.Unmarshal(data, &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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x.data = config.ExpandValueEnvForMap(x.data)
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return x, nil
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}
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// JSONConfigContainer is a config which 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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func (c *JSONConfigContainer) Unmarshaler(ctx context.Context, prefix string, obj interface{}, opt ...config.DecodeOption) error {
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sub, err := c.sub(ctx, prefix)
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if err != nil {
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return err
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}
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return mapstructure.Decode(sub, obj)
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}
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func (c *JSONConfigContainer) Sub(ctx context.Context, key string) (config.Configer, error) {
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sub, err := c.sub(ctx, key)
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if err != nil {
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return nil, err
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}
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return &JSONConfigContainer{
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data: sub,
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}, nil
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}
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func (c *JSONConfigContainer) sub(ctx context.Context, key string) (map[string]interface{}, error) {
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if key == "" {
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return c.data, nil
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}
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value, ok := c.data[key]
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if !ok {
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return nil, errors.New(fmt.Sprintf("key is not found: %s", key))
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}
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res, ok := value.(map[string]interface{})
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if !ok {
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return nil, errors.New(fmt.Sprintf("the type of value is invalid, key: %s", key))
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}
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return res, nil
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}
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func (c *JSONConfigContainer) OnChange(ctx context.Context, key string, fn func(value string)) {
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logs.Warn("unsupported operation")
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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(ctx context.Context, key string) (bool, error) {
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val := c.getData(key)
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if val != nil {
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return config.ParseBool(val)
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}
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return false, fmt.Errorf("not exist key: %q", key)
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}
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// DefaultBool return the bool value if has no error
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// otherwise return the defaultval
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func (c *JSONConfigContainer) DefaultBool(ctx context.Context, key string, defaultVal bool) bool {
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if v, err := c.Bool(ctx, key); err == nil {
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return v
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}
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return defaultVal
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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(ctx context.Context, 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 if v, ok := val.(string); ok {
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return strconv.Atoi(v)
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}
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return 0, errors.New("not valid value")
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}
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return 0, errors.New("not exist key:" + key)
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}
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// DefaultInt returns the integer value for a given key.
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// if err != nil return defaultval
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func (c *JSONConfigContainer) DefaultInt(ctx context.Context, key string, defaultVal int) int {
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if v, err := c.Int(ctx, key); err == nil {
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return v
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}
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return defaultVal
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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(ctx context.Context, 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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}
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return 0, errors.New("not int64 value")
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}
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return 0, errors.New("not exist key:" + key)
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}
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// DefaultInt64 returns the int64 value for a given key.
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// if err != nil return defaultval
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func (c *JSONConfigContainer) DefaultInt64(ctx context.Context, key string, defaultVal int64) int64 {
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if v, err := c.Int64(ctx, key); err == nil {
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return v
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}
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return defaultVal
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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(ctx context.Context, 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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}
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return 0.0, errors.New("not float64 value")
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}
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return 0.0, errors.New("not exist key:" + key)
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}
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// DefaultFloat returns the float64 value for a given key.
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// if err != nil return defaultval
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func (c *JSONConfigContainer) DefaultFloat(ctx context.Context, key string, defaultVal float64) float64 {
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if v, err := c.Float(ctx, key); err == nil {
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return v
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}
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return defaultVal
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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(ctx context.Context, key string) (string, error) {
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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, nil
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}
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}
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return "", nil
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}
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// DefaultString returns the string value for a given key.
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// if err != nil return defaultval
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func (c *JSONConfigContainer) DefaultString(ctx context.Context, key string, defaultVal string) string {
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// TODO FIXME should not use "" to replace non existence
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if v, err := c.String(ctx, key); v != "" && err == nil {
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return v
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}
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return defaultVal
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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(ctx context.Context, key string) ([]string, error) {
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stringVal, err := c.String(nil, key)
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if stringVal == "" || err != nil {
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return nil, err
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}
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return strings.Split(stringVal, ";"), nil
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}
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// DefaultStrings returns the []string value for a given key.
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// if err != nil return defaultval
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func (c *JSONConfigContainer) DefaultStrings(ctx context.Context, key string, defaultVal []string) []string {
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if v, err := c.Strings(ctx, key); v != nil && err == nil {
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return v
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}
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return defaultVal
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}
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// GetSection returns map for the given section
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func (c *JSONConfigContainer) GetSection(ctx context.Context, section string) (map[string]string, error) {
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if v, ok := c.data[section]; ok {
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return v.(map[string]string), nil
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}
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return nil, errors.New("nonexist section " + section)
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}
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// SaveConfigFile save the config into file
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func (c *JSONConfigContainer) SaveConfigFile(ctx context.Context, filename string) (err error) {
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// Write configuration file by filename.
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f, err := os.Create(filename)
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if err != nil {
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return err
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}
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defer f.Close()
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b, err := json.MarshalIndent(c.data, "", " ")
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if err != nil {
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return err
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}
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_, err = f.Write(b)
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return err
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}
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// Set writes a new value for key.
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func (c *JSONConfigContainer) Set(ctx context.Context, 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(ctx context.Context, 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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}
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return nil, errors.New("not exist key")
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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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if len(key) == 0 {
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return nil
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}
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c.RLock()
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defer c.RUnlock()
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sectionKeys := strings.Split(key, "::")
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if len(sectionKeys) >= 2 {
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curValue, ok := c.data[sectionKeys[0]]
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if !ok {
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return nil
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}
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for _, key := range sectionKeys[1:] {
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if v, ok := curValue.(map[string]interface{}); ok {
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if curValue, ok = v[key]; !ok {
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return nil
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}
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}
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}
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return curValue
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}
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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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return nil
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}
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func init() {
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config.Register("json", &JSONConfig{})
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}
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