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Ming Deng
228
pkg/config/xml/xml.go
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228
pkg/config/xml/xml.go
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// 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 xml for config provider.
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//
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// depend on github.com/beego/x2j.
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//
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// go install github.com/beego/x2j.
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//
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// Usage:
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// import(
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// _ "github.com/astaxie/beego/config/xml"
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// "github.com/astaxie/beego/config"
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// )
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//
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// cnf, err := config.NewConfig("xml", "config.xml")
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//
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//More docs http://beego.me/docs/module/config.md
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package xml
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import (
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"encoding/xml"
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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/astaxie/beego/config"
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"github.com/beego/x2j"
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)
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// Config is a xml config parser and implements Config interface.
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// xml configurations should be included in <config></config> tag.
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// only support key/value pair as <key>value</key> as each item.
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type Config struct{}
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// Parse returns a ConfigContainer with parsed xml config map.
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func (xc *Config) Parse(filename string) (config.Configer, error) {
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context, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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return xc.ParseData(context)
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}
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// ParseData xml data
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func (xc *Config) ParseData(data []byte) (config.Configer, error) {
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x := &ConfigContainer{data: make(map[string]interface{})}
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d, err := x2j.DocToMap(string(data))
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if err != nil {
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return nil, err
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}
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x.data = config.ExpandValueEnvForMap(d["config"].(map[string]interface{}))
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return x, nil
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}
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// ConfigContainer A Config represents the xml configuration.
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type ConfigContainer struct {
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data map[string]interface{}
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sync.Mutex
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}
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// Bool returns the boolean value for a given key.
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func (c *ConfigContainer) Bool(key string) (bool, error) {
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if v := c.data[key]; v != nil {
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return config.ParseBool(v)
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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 *ConfigContainer) DefaultBool(key string, defaultval bool) bool {
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v, err := c.Bool(key)
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if err != nil {
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return defaultval
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}
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return v
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}
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// Int returns the integer value for a given key.
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func (c *ConfigContainer) Int(key string) (int, error) {
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return strconv.Atoi(c.data[key].(string))
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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 *ConfigContainer) DefaultInt(key string, defaultval int) int {
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v, err := c.Int(key)
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if err != nil {
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return defaultval
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}
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return v
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}
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// Int64 returns the int64 value for a given key.
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func (c *ConfigContainer) Int64(key string) (int64, error) {
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return strconv.ParseInt(c.data[key].(string), 10, 64)
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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 *ConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
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v, err := c.Int64(key)
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if err != nil {
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return defaultval
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}
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return v
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}
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// Float returns the float value for a given key.
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func (c *ConfigContainer) Float(key string) (float64, error) {
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return strconv.ParseFloat(c.data[key].(string), 64)
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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 *ConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
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v, err := c.Float(key)
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if err != nil {
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return defaultval
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}
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return v
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}
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// String returns the string value for a given key.
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func (c *ConfigContainer) String(key string) string {
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if v, ok := c.data[key].(string); ok {
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return v
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}
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return ""
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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 *ConfigContainer) DefaultString(key string, defaultval string) string {
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v := c.String(key)
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if v == "" {
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return defaultval
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}
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return v
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}
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// Strings returns the []string value for a given key.
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func (c *ConfigContainer) Strings(key string) []string {
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v := c.String(key)
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if v == "" {
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return nil
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}
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return strings.Split(v, ";")
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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 *ConfigContainer) DefaultStrings(key string, defaultval []string) []string {
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v := c.Strings(key)
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if v == nil {
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return defaultval
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}
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return v
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}
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// GetSection returns map for the given section
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func (c *ConfigContainer) GetSection(section string) (map[string]string, error) {
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if v, ok := c.data[section].(map[string]interface{}); ok {
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mapstr := make(map[string]string)
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for k, val := range v {
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mapstr[k] = config.ToString(val)
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}
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return mapstr, nil
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}
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return nil, fmt.Errorf("section '%s' not found", section)
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}
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// SaveConfigFile save the config into file
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func (c *ConfigContainer) SaveConfigFile(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 := xml.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 *ConfigContainer) 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 *ConfigContainer) DIY(key string) (v interface{}, err error) {
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if v, ok := c.data[key]; ok {
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return v, nil
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}
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return nil, errors.New("not exist key")
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}
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func init() {
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config.Register("xml", &Config{})
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}
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125
pkg/config/xml/xml_test.go
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125
pkg/config/xml/xml_test.go
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@ -0,0 +1,125 @@
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// 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 xml
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import (
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"fmt"
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"os"
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"testing"
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"github.com/astaxie/beego/config"
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)
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func TestXML(t *testing.T) {
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var (
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//xml parse should incluce in <config></config> tags
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xmlcontext = `<?xml version="1.0" encoding="UTF-8"?>
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<config>
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<appname>beeapi</appname>
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<httpport>8080</httpport>
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<mysqlport>3600</mysqlport>
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<PI>3.1415976</PI>
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<runmode>dev</runmode>
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<autorender>false</autorender>
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<copyrequestbody>true</copyrequestbody>
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<path1>${GOPATH}</path1>
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<path2>${GOPATH||/home/go}</path2>
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<mysection>
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<id>1</id>
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<name>MySection</name>
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</mysection>
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</config>
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`
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keyValue = map[string]interface{}{
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"appname": "beeapi",
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"httpport": 8080,
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"mysqlport": int64(3600),
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"PI": 3.1415976,
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"runmode": "dev",
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"autorender": false,
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"copyrequestbody": true,
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"path1": os.Getenv("GOPATH"),
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"path2": os.Getenv("GOPATH"),
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"error": "",
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"emptystrings": []string{},
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}
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)
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f, err := os.Create("testxml.conf")
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if err != nil {
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t.Fatal(err)
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}
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_, err = f.WriteString(xmlcontext)
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if err != nil {
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f.Close()
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t.Fatal(err)
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}
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f.Close()
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defer os.Remove("testxml.conf")
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xmlconf, err := config.NewConfig("xml", "testxml.conf")
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if err != nil {
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t.Fatal(err)
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}
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var xmlsection map[string]string
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xmlsection, err = xmlconf.GetSection("mysection")
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if err != nil {
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t.Fatal(err)
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}
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if len(xmlsection) == 0 {
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t.Error("section should not be empty")
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}
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for k, v := range keyValue {
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var (
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value interface{}
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err error
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)
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switch v.(type) {
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case int:
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value, err = xmlconf.Int(k)
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case int64:
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value, err = xmlconf.Int64(k)
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case float64:
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value, err = xmlconf.Float(k)
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case bool:
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value, err = xmlconf.Bool(k)
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case []string:
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value = xmlconf.Strings(k)
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case string:
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value = xmlconf.String(k)
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default:
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value, err = xmlconf.DIY(k)
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}
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if err != nil {
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t.Errorf("get key %q value fatal,%v err %s", k, v, err)
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} else if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", value) {
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t.Errorf("get key %q value, want %v got %v .", k, v, value)
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}
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}
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if err = xmlconf.Set("name", "astaxie"); err != nil {
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t.Fatal(err)
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}
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if xmlconf.String("name") != "astaxie" {
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t.Fatal("get name error")
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}
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}
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