Merge pull request #4173 from AllenX2018/fix-bug-queryRow

Fix issue 3866

pkg/infrastructure/config/base_config_test.go

@@ -0,0 +1,71 @@
+// Copyright 2020
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBaseConfiger_DefaultBool(t *testing.T) {
+	bc := newBaseConfier("true")
+	assert.True(t, bc.DefaultBool("key1", false))
+	assert.True(t, bc.DefaultBool("key2", true))
+}
+
+func TestBaseConfiger_DefaultFloat(t *testing.T) {
+	bc := newBaseConfier("12.3")
+	assert.Equal(t, 12.3, bc.DefaultFloat("key1", 0.1))
+	assert.Equal(t, 0.1, bc.DefaultFloat("key2", 0.1))
+}
+
+func TestBaseConfiger_DefaultInt(t *testing.T) {
+	bc := newBaseConfier("10")
+	assert.Equal(t, 10, bc.DefaultInt("key1", 8))
+	assert.Equal(t, 8, bc.DefaultInt("key2", 8))
+}
+
+func TestBaseConfiger_DefaultInt64(t *testing.T) {
+	bc := newBaseConfier("64")
+	assert.Equal(t, int64(64), bc.DefaultInt64("key1", int64(8)))
+	assert.Equal(t, int64(8), bc.DefaultInt64("key2", int64(8)))
+}
+
+func TestBaseConfiger_DefaultString(t *testing.T) {
+	bc := newBaseConfier("Hello")
+	assert.Equal(t, "Hello", bc.DefaultString("key1", "world"))
+	assert.Equal(t, "world", bc.DefaultString("key2", "world"))
+}
+
+func TestBaseConfiger_DefaultStrings(t *testing.T) {
+	bc := newBaseConfier("Hello;world")
+	assert.Equal(t, []string{"Hello", "world"}, bc.DefaultStrings("key1", []string{"world"}))
+	assert.Equal(t, []string{"world"}, bc.DefaultStrings("key2", []string{"world"}))
+}
+
+func newBaseConfier(str1 string) *BaseConfiger {
+	return &BaseConfiger{
+		reader: func(key string) (string, error) {
+			if key == "key1" {
+				return str1, nil
+			} else {
+				return "", errors.New("mock error")
+			}
+
+		},
+	}
+}

pkg/infrastructure/config/config.go

@@ -0,0 +1,363 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package config is used to parse config.
+// Usage:
+//  import "github.com/astaxie/beego/config"
+// Examples.
+//
+//  cnf, err := config.NewConfig("ini", "config.conf")
+//
+//  cnf APIS:
+//
+//  cnf.Set(key, val string) error
+//  cnf.String(key string) string
+//  cnf.Strings(key string) []string
+//  cnf.Int(key string) (int, error)
+//  cnf.Int64(key string) (int64, error)
+//  cnf.Bool(key string) (bool, error)
+//  cnf.Float(key string) (float64, error)
+//  cnf.DefaultString(key string, defaultVal string) string
+//  cnf.DefaultStrings(key string, defaultVal []string) []string
+//  cnf.DefaultInt(key string, defaultVal int) int
+//  cnf.DefaultInt64(key string, defaultVal int64) int64
+//  cnf.DefaultBool(key string, defaultVal bool) bool
+//  cnf.DefaultFloat(key string, defaultVal float64) float64
+//  cnf.DIY(key string) (interface{}, error)
+//  cnf.GetSection(section string) (map[string]string, error)
+//  cnf.SaveConfigFile(filename string) error
+// More docs http://beego.me/docs/module/config.md
+package config
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Configer defines how to get and set value from configuration raw data.
+type Configer interface {
+	// support section::key type in given key when using ini type.
+	Set(key, val string) error
+
+	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	String(key string) string
+	// get string slice
+	Strings(key string) []string
+	Int(key string) (int, error)
+	Int64(key string) (int64, error)
+	Bool(key string) (bool, error)
+	Float(key string) (float64, error)
+	// support section::key type in key string when using ini and json type; Int,Int64,Bool,Float,DIY are same.
+	DefaultString(key string, defaultVal string) string
+	// get string slice
+	DefaultStrings(key string, defaultVal []string) []string
+	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)
+
+	Unmarshaler(obj interface{}) error
+	Sub(key string) (Configer, error)
+	OnChange(fn func(cfg Configer))
+	// GetByPrefix(prefix string) ([]byte, error)
+	// GetSerializer() Serializer
+	SaveConfigFile(filename string) error
+}
+
+type BaseConfiger struct {
+	// The reader should support key like "a.b.c"
+	reader func(key string) (string, error)
+}
+
+func (c *BaseConfiger) Int(key string) (int, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.Atoi(res)
+}
+
+func (c *BaseConfiger) Int64(key string) (int64, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.ParseInt(res, 10, 64)
+}
+
+func (c *BaseConfiger) Bool(key string) (bool, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return false, err
+	}
+	return strconv.ParseBool(res)
+}
+
+func (c *BaseConfiger) Float(key string) (float64, error) {
+	res, err := c.reader(key)
+	if err != nil {
+		return 0, err
+	}
+	return strconv.ParseFloat(res, 64)
+}
+
+func (c *BaseConfiger) DefaultString(key string, defaultVal string) string {
+	if res := c.String(key); res != "" {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultStrings(key string, defaultVal []string) []string {
+	if res := c.Strings(key); len(res) > 0 {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultInt(key string, defaultVal int) int {
+	if res, err := c.Int(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultInt64(key string, defaultVal int64) int64 {
+	if res, err := c.Int64(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) DefaultBool(key string, defaultVal bool) bool {
+	if res, err := c.Bool(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+func (c *BaseConfiger) DefaultFloat(key string, defaultVal float64) float64 {
+	if res, err := c.Float(key); err == nil {
+		return res
+	}
+	return defaultVal
+}
+
+func (c *BaseConfiger) String(key string) string {
+	res, _ := c.reader(key)
+	return res
+}
+
+func (c *BaseConfiger) Strings(key string) []string {
+	res, err := c.reader(key)
+	if err != nil || res == "" {
+		return nil
+	}
+	return strings.Split(res, ";")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) Unmarshaler(obj interface{}) error {
+	return errors.New("unsupported operation")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) Sub(key string) (Configer, error) {
+	return nil, errors.New("unsupported operation")
+}
+
+// TODO remove this before release v2.0.0
+func (c *BaseConfiger) OnChange(fn func(cfg Configer)) {
+	// do nothing
+}
+
+// Config is the adapter interface for parsing config file to get raw data to Configer.
+type Config interface {
+	Parse(key string) (Configer, error)
+	ParseData(data []byte) (Configer, error)
+}
+
+var adapters = make(map[string]Config)
+
+// Register makes a config adapter available by the adapter name.
+// If Register is called twice with the same name or if driver is nil,
+// it panics.
+func Register(name string, adapter Config) {
+	if adapter == nil {
+		panic("config: Register adapter is nil")
+	}
+	if _, ok := adapters[name]; ok {
+		panic("config: Register called twice for adapter " + name)
+	}
+	adapters[name] = adapter
+}
+
+// NewConfig adapterName is ini/json/xml/yaml.
+// filename is the config file path.
+func NewConfig(adapterName, filename string) (Configer, error) {
+	adapter, ok := adapters[adapterName]
+	if !ok {
+		return nil, fmt.Errorf("config: unknown adaptername %q (forgotten import?)", adapterName)
+	}
+	return adapter.Parse(filename)
+}
+
+// NewConfigData adapterName is ini/json/xml/yaml.
+// data is the config data.
+func NewConfigData(adapterName string, data []byte) (Configer, error) {
+	adapter, ok := adapters[adapterName]
+	if !ok {
+		return nil, fmt.Errorf("config: unknown adaptername %q (forgotten import?)", adapterName)
+	}
+	return adapter.ParseData(data)
+}
+
+// ExpandValueEnvForMap convert all string value with environment variable.
+func ExpandValueEnvForMap(m map[string]interface{}) map[string]interface{} {
+	for k, v := range m {
+		switch value := v.(type) {
+		case string:
+			m[k] = ExpandValueEnv(value)
+		case map[string]interface{}:
+			m[k] = ExpandValueEnvForMap(value)
+		case map[string]string:
+			for k2, v2 := range value {
+				value[k2] = ExpandValueEnv(v2)
+			}
+			m[k] = value
+		}
+	}
+	return m
+}
+
+// ExpandValueEnv returns value of convert with environment variable.
+//
+// Return environment variable if value start with "${" and end with "}".
+// Return default value if environment variable is empty or not exist.
+//
+// It accept value formats "${env}" , "${env||}}" , "${env||defaultValue}" , "defaultvalue".
+// Examples:
+//	v1 := config.ExpandValueEnv("${GOPATH}")			// return the GOPATH environment variable.
+//	v2 := config.ExpandValueEnv("${GOAsta||/usr/local/go}")	// return the default value "/usr/local/go/".
+//	v3 := config.ExpandValueEnv("Astaxie")				// return the value "Astaxie".
+func ExpandValueEnv(value string) (realValue string) {
+	realValue = value
+
+	vLen := len(value)
+	// 3 = ${}
+	if vLen < 3 {
+		return
+	}
+	// Need start with "${" and end with "}", then return.
+	if value[0] != '$' || value[1] != '{' || value[vLen-1] != '}' {
+		return
+	}
+
+	key := ""
+	defaultV := ""
+	// value start with "${"
+	for i := 2; i < vLen; i++ {
+		if value[i] == '|' && (i+1 < vLen && value[i+1] == '|') {
+			key = value[2:i]
+			defaultV = value[i+2 : vLen-1] // other string is default value.
+			break
+		} else if value[i] == '}' {
+			key = value[2:i]
+			break
+		}
+	}
+
+	realValue = os.Getenv(key)
+	if realValue == "" {
+		realValue = defaultV
+	}
+
+	return
+}
+
+// ParseBool returns the boolean value represented by the string.
+//
+// It accepts 1, 1.0, t, T, TRUE, true, True, YES, yes, Yes,Y, y, ON, on, On,
+// 0, 0.0, f, F, FALSE, false, False, NO, no, No, N,n, OFF, off, Off.
+// Any other value returns an error.
+func ParseBool(val interface{}) (value bool, err error) {
+	if val != nil {
+		switch v := val.(type) {
+		case bool:
+			return v, nil
+		case string:
+			switch v {
+			case "1", "t", "T", "true", "TRUE", "True", "YES", "yes", "Yes", "Y", "y", "ON", "on", "On":
+				return true, nil
+			case "0", "f", "F", "false", "FALSE", "False", "NO", "no", "No", "N", "n", "OFF", "off", "Off":
+				return false, nil
+			}
+		case int8, int32, int64:
+			strV := fmt.Sprintf("%d", v)
+			if strV == "1" {
+				return true, nil
+			} else if strV == "0" {
+				return false, nil
+			}
+		case float64:
+			if v == 1.0 {
+				return true, nil
+			} else if v == 0.0 {
+				return false, nil
+			}
+		}
+		return false, fmt.Errorf("parsing %q: invalid syntax", val)
+	}
+	return false, fmt.Errorf("parsing <nil>: invalid syntax")
+}
+
+// ToString converts values of any type to string.
+func ToString(x interface{}) string {
+	switch y := x.(type) {
+
+	// Handle dates with special logic
+	// This needs to come above the fmt.Stringer
+	// test since time.Time's have a .String()
+	// method
+	case time.Time:
+		return y.Format("A Monday")
+
+	// Handle type string
+	case string:
+		return y
+
+	// Handle type with .String() method
+	case fmt.Stringer:
+		return y.String()
+
+	// Handle type with .Error() method
+	case error:
+		return y.Error()
+
+	}
+
+	// Handle named string type
+	if v := reflect.ValueOf(x); v.Kind() == reflect.String {
+		return v.String()
+	}
+
+	// Fallback to fmt package for anything else like numeric types
+	return fmt.Sprint(x)
+}

pkg/infrastructure/config/config_test.go

@@ -0,0 +1,55 @@
+// Copyright 2016 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"os"
+	"testing"
+)
+
+func TestExpandValueEnv(t *testing.T) {
+
+	testCases := []struct {
+		item string
+		want string
+	}{
+		{"", ""},
+		{"$", "$"},
+		{"{", "{"},
+		{"{}", "{}"},
+		{"${}", ""},
+		{"${|}", ""},
+		{"${}", ""},
+		{"${{}}", ""},
+		{"${{||}}", "}"},
+		{"${pwd||}", ""},
+		{"${pwd||}", ""},
+		{"${pwd||}", ""},
+		{"${pwd||}}", "}"},
+		{"${pwd||{{||}}}", "{{||}}"},
+		{"${GOPATH}", os.Getenv("GOPATH")},
+		{"${GOPATH||}", os.Getenv("GOPATH")},
+		{"${GOPATH||root}", os.Getenv("GOPATH")},
+		{"${GOPATH_NOT||root}", "root"},
+		{"${GOPATH_NOT||||root}", "||root"},
+	}
+
+	for _, c := range testCases {
+		if got := ExpandValueEnv(c.item); got != c.want {
+			t.Errorf("expand value error, item %q want %q, got %q", c.item, c.want, got)
+		}
+	}
+
+}

pkg/infrastructure/config/env/env.go

@@ -0,0 +1,87 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+// Copyright 2017 Faissal Elamraoui. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package env is used to parse environment.
+package env
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/astaxie/beego/pkg/infrastructure/utils"
+)
+
+var env *utils.BeeMap
+
+func init() {
+	env = utils.NewBeeMap()
+	for _, e := range os.Environ() {
+		splits := strings.Split(e, "=")
+		env.Set(splits[0], os.Getenv(splits[0]))
+	}
+}
+
+// Get returns a value for a given key.
+// If the key does not exist, the default value will be returned.
+func Get(key string, defVal string) string {
+	if val := env.Get(key); val != nil {
+		return val.(string)
+	}
+	return defVal
+}
+
+// MustGet returns a value by key.
+// If the key does not exist, it will return an error.
+func MustGet(key string) (string, error) {
+	if val := env.Get(key); val != nil {
+		return val.(string), nil
+	}
+	return "", fmt.Errorf("no env variable with %s", key)
+}
+
+// Set sets a value in the ENV copy.
+// This does not affect the child process environment.
+func Set(key string, value string) {
+	env.Set(key, value)
+}
+
+// MustSet sets a value in the ENV copy and the child process environment.
+// It returns an error in case the set operation failed.
+func MustSet(key string, value string) error {
+	err := os.Setenv(key, value)
+	if err != nil {
+		return err
+	}
+	env.Set(key, value)
+	return nil
+}
+
+// GetAll returns all keys/values in the current child process environment.
+func GetAll() map[string]string {
+	items := env.Items()
+	envs := make(map[string]string, env.Count())
+
+	for key, val := range items {
+		switch key := key.(type) {
+		case string:
+			switch val := val.(type) {
+			case string:
+				envs[key] = val
+			}
+		}
+	}
+	return envs
+}

pkg/infrastructure/config/env/env_test.go

@@ -0,0 +1,75 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+// Copyright 2017 Faissal Elamraoui. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package env
+
+import (
+	"os"
+	"testing"
+)
+
+func TestEnvGet(t *testing.T) {
+	gopath := Get("GOPATH", "")
+	if gopath != os.Getenv("GOPATH") {
+		t.Error("expected GOPATH not empty.")
+	}
+
+	noExistVar := Get("NOEXISTVAR", "foo")
+	if noExistVar != "foo" {
+		t.Errorf("expected NOEXISTVAR to equal foo, got %s.", noExistVar)
+	}
+}
+
+func TestEnvMustGet(t *testing.T) {
+	gopath, err := MustGet("GOPATH")
+	if err != nil {
+		t.Error(err)
+	}
+
+	if gopath != os.Getenv("GOPATH") {
+		t.Errorf("expected GOPATH to be the same, got %s.", gopath)
+	}
+
+	_, err = MustGet("NOEXISTVAR")
+	if err == nil {
+		t.Error("expected error to be non-nil")
+	}
+}
+
+func TestEnvSet(t *testing.T) {
+	Set("MYVAR", "foo")
+	myVar := Get("MYVAR", "bar")
+	if myVar != "foo" {
+		t.Errorf("expected MYVAR to equal foo, got %s.", myVar)
+	}
+}
+
+func TestEnvMustSet(t *testing.T) {
+	err := MustSet("FOO", "bar")
+	if err != nil {
+		t.Error(err)
+	}
+
+	fooVar := os.Getenv("FOO")
+	if fooVar != "bar" {
+		t.Errorf("expected FOO variable to equal bar, got %s.", fooVar)
+	}
+}
+
+func TestEnvGetAll(t *testing.T) {
+	envMap := GetAll()
+	if len(envMap) == 0 {
+		t.Error("expected environment not empty.")
+	}
+}

pkg/infrastructure/config/fake.go

@@ -0,0 +1,135 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+)
+
+type fakeConfigContainer struct {
+	BaseConfiger
+	data map[string]string
+}
+
+func (c *fakeConfigContainer) getData(key string) string {
+	return c.data[strings.ToLower(key)]
+}
+
+func (c *fakeConfigContainer) Set(key, val string) error {
+	c.data[strings.ToLower(key)] = val
+	return nil
+}
+
+func (c *fakeConfigContainer) String(key string) string {
+	return c.getData(key)
+}
+
+func (c *fakeConfigContainer) DefaultString(key string, defaultval string) string {
+	v := c.String(key)
+	if v == "" {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) Strings(key string) []string {
+	v := c.String(key)
+	if v == "" {
+		return nil
+	}
+	return strings.Split(v, ";")
+}
+
+func (c *fakeConfigContainer) DefaultStrings(key string, defaultval []string) []string {
+	v := c.Strings(key)
+	if v == nil {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) Int(key string) (int, error) {
+	return strconv.Atoi(c.getData(key))
+}
+
+func (c *fakeConfigContainer) DefaultInt(key string, defaultval int) int {
+	v, err := c.Int(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) Int64(key string) (int64, error) {
+	return strconv.ParseInt(c.getData(key), 10, 64)
+}
+
+func (c *fakeConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
+	v, err := c.Int64(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) Bool(key string) (bool, error) {
+	return ParseBool(c.getData(key))
+}
+
+func (c *fakeConfigContainer) DefaultBool(key string, defaultval bool) bool {
+	v, err := c.Bool(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) Float(key string) (float64, error) {
+	return strconv.ParseFloat(c.getData(key), 64)
+}
+
+func (c *fakeConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
+	v, err := c.Float(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+func (c *fakeConfigContainer) DIY(key string) (interface{}, error) {
+	if v, ok := c.data[strings.ToLower(key)]; ok {
+		return v, nil
+	}
+	return nil, errors.New("key not find")
+}
+
+func (c *fakeConfigContainer) GetSection(section string) (map[string]string, error) {
+	return nil, errors.New("not implement in the fakeConfigContainer")
+}
+
+func (c *fakeConfigContainer) SaveConfigFile(filename string) error {
+	return errors.New("not implement in the fakeConfigContainer")
+}
+
+var _ Configer = new(fakeConfigContainer)
+
+// NewFakeConfig return a fake Configer
+func NewFakeConfig() Configer {
+	return &fakeConfigContainer{
+		data: make(map[string]string),
+	}
+}

pkg/infrastructure/config/ini.go

@@ -0,0 +1,505 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/user"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"sync"
+)
+
+var (
+	defaultSection = "default"   // default section means if some ini items not in a section, make them in default section,
+	bNumComment    = []byte{'#'} // number signal
+	bSemComment    = []byte{';'} // semicolon signal
+	bEmpty         = []byte{}
+	bEqual         = []byte{'='} // equal signal
+	bDQuote        = []byte{'"'} // quote signal
+	sectionStart   = []byte{'['} // section start signal
+	sectionEnd     = []byte{']'} // section end signal
+	lineBreak      = "\n"
+)
+
+// IniConfig implements Config to parse ini file.
+type IniConfig struct {
+}
+
+// Parse creates a new Config and parses the file configuration from the named file.
+func (ini *IniConfig) Parse(name string) (Configer, error) {
+	return ini.parseFile(name)
+}
+
+func (ini *IniConfig) parseFile(name string) (*IniConfigContainer, error) {
+	data, err := ioutil.ReadFile(name)
+	if err != nil {
+		return nil, err
+	}
+
+	return ini.parseData(filepath.Dir(name), data)
+}
+
+func (ini *IniConfig) parseData(dir string, data []byte) (*IniConfigContainer, error) {
+	cfg := &IniConfigContainer{
+		data:           make(map[string]map[string]string),
+		sectionComment: make(map[string]string),
+		keyComment:     make(map[string]string),
+		RWMutex:        sync.RWMutex{},
+	}
+	cfg.Lock()
+	defer cfg.Unlock()
+
+	var comment bytes.Buffer
+	buf := bufio.NewReader(bytes.NewBuffer(data))
+	// check the BOM
+	head, err := buf.Peek(3)
+	if err == nil && head[0] == 239 && head[1] == 187 && head[2] == 191 {
+		for i := 1; i <= 3; i++ {
+			buf.ReadByte()
+		}
+	}
+	section := defaultSection
+	tmpBuf := bytes.NewBuffer(nil)
+	for {
+		tmpBuf.Reset()
+
+		shouldBreak := false
+		for {
+			tmp, isPrefix, err := buf.ReadLine()
+			if err == io.EOF {
+				shouldBreak = true
+				break
+			}
+
+			//It might be a good idea to throw a error on all unknonw errors?
+			if _, ok := err.(*os.PathError); ok {
+				return nil, err
+			}
+
+			tmpBuf.Write(tmp)
+			if isPrefix {
+				continue
+			}
+
+			if !isPrefix {
+				break
+			}
+		}
+		if shouldBreak {
+			break
+		}
+
+		line := tmpBuf.Bytes()
+		line = bytes.TrimSpace(line)
+		if bytes.Equal(line, bEmpty) {
+			continue
+		}
+		var bComment []byte
+		switch {
+		case bytes.HasPrefix(line, bNumComment):
+			bComment = bNumComment
+		case bytes.HasPrefix(line, bSemComment):
+			bComment = bSemComment
+		}
+		if bComment != nil {
+			line = bytes.TrimLeft(line, string(bComment))
+			// Need append to a new line if multi-line comments.
+			if comment.Len() > 0 {
+				comment.WriteByte('\n')
+			}
+			comment.Write(line)
+			continue
+		}
+
+		if bytes.HasPrefix(line, sectionStart) && bytes.HasSuffix(line, sectionEnd) {
+			section = strings.ToLower(string(line[1 : len(line)-1])) // section name case insensitive
+			if comment.Len() > 0 {
+				cfg.sectionComment[section] = comment.String()
+				comment.Reset()
+			}
+			if _, ok := cfg.data[section]; !ok {
+				cfg.data[section] = make(map[string]string)
+			}
+			continue
+		}
+
+		if _, ok := cfg.data[section]; !ok {
+			cfg.data[section] = make(map[string]string)
+		}
+		keyValue := bytes.SplitN(line, bEqual, 2)
+
+		key := string(bytes.TrimSpace(keyValue[0])) // key name case insensitive
+		key = strings.ToLower(key)
+
+		// handle include "other.conf"
+		if len(keyValue) == 1 && strings.HasPrefix(key, "include") {
+
+			includefiles := strings.Fields(key)
+			if includefiles[0] == "include" && len(includefiles) == 2 {
+
+				otherfile := strings.Trim(includefiles[1], "\"")
+				if !filepath.IsAbs(otherfile) {
+					otherfile = filepath.Join(dir, otherfile)
+				}
+
+				i, err := ini.parseFile(otherfile)
+				if err != nil {
+					return nil, err
+				}
+
+				for sec, dt := range i.data {
+					if _, ok := cfg.data[sec]; !ok {
+						cfg.data[sec] = make(map[string]string)
+					}
+					for k, v := range dt {
+						cfg.data[sec][k] = v
+					}
+				}
+
+				for sec, comm := range i.sectionComment {
+					cfg.sectionComment[sec] = comm
+				}
+
+				for k, comm := range i.keyComment {
+					cfg.keyComment[k] = comm
+				}
+
+				continue
+			}
+		}
+
+		if len(keyValue) != 2 {
+			return nil, errors.New("read the content error: \"" + string(line) + "\", should key = val")
+		}
+		val := bytes.TrimSpace(keyValue[1])
+		if bytes.HasPrefix(val, bDQuote) {
+			val = bytes.Trim(val, `"`)
+		}
+
+		cfg.data[section][key] = ExpandValueEnv(string(val))
+		if comment.Len() > 0 {
+			cfg.keyComment[section+"."+key] = comment.String()
+			comment.Reset()
+		}
+
+	}
+	return cfg, nil
+}
+
+// ParseData parse ini the data
+// When include other.conf,other.conf is either absolute directory
+// or under beego in default temporary directory(/tmp/beego[-username]).
+func (ini *IniConfig) ParseData(data []byte) (Configer, error) {
+	dir := "beego"
+	currentUser, err := user.Current()
+	if err == nil {
+		dir = "beego-" + currentUser.Username
+	}
+	dir = filepath.Join(os.TempDir(), dir)
+	if err = os.MkdirAll(dir, os.ModePerm); err != nil {
+		return nil, err
+	}
+
+	return ini.parseData(dir, data)
+}
+
+// IniConfigContainer is a config which represents the ini configuration.
+// When set and get value, support key as section:name type.
+type IniConfigContainer struct {
+	BaseConfiger
+	data           map[string]map[string]string // section=> key:val
+	sectionComment map[string]string            // section : comment
+	keyComment     map[string]string            // id: []{comment, key...}; id 1 is for main comment.
+	sync.RWMutex
+}
+
+// Bool returns the boolean value for a given key.
+func (c *IniConfigContainer) Bool(key string) (bool, error) {
+	return ParseBool(c.getdata(key))
+}
+
+// DefaultBool returns the boolean value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultBool(key string, defaultval bool) bool {
+	v, err := c.Bool(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int returns the integer value for a given key.
+func (c *IniConfigContainer) Int(key string) (int, error) {
+	return strconv.Atoi(c.getdata(key))
+}
+
+// DefaultInt returns the integer value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultInt(key string, defaultval int) int {
+	v, err := c.Int(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int64 returns the int64 value for a given key.
+func (c *IniConfigContainer) Int64(key string) (int64, error) {
+	return strconv.ParseInt(c.getdata(key), 10, 64)
+}
+
+// DefaultInt64 returns the int64 value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
+	v, err := c.Int64(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Float returns the float value for a given key.
+func (c *IniConfigContainer) Float(key string) (float64, error) {
+	return strconv.ParseFloat(c.getdata(key), 64)
+}
+
+// DefaultFloat returns the float64 value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
+	v, err := c.Float(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// String returns the string value for a given key.
+func (c *IniConfigContainer) String(key string) string {
+	return c.getdata(key)
+}
+
+// DefaultString returns the string value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultString(key string, defaultval string) string {
+	v := c.String(key)
+	if v == "" {
+		return defaultval
+	}
+	return v
+}
+
+// Strings returns the []string value for a given key.
+// Return nil if config value does not exist or is empty.
+func (c *IniConfigContainer) Strings(key string) []string {
+	v := c.String(key)
+	if v == "" {
+		return nil
+	}
+	return strings.Split(v, ";")
+}
+
+// DefaultStrings returns the []string value for a given key.
+// if err != nil return defaultval
+func (c *IniConfigContainer) DefaultStrings(key string, defaultval []string) []string {
+	v := c.Strings(key)
+	if v == nil {
+		return defaultval
+	}
+	return v
+}
+
+// GetSection returns map for the given section
+func (c *IniConfigContainer) GetSection(section string) (map[string]string, error) {
+	if v, ok := c.data[section]; ok {
+		return v, nil
+	}
+	return nil, errors.New("not exist section")
+}
+
+// SaveConfigFile save the config into file.
+//
+// BUG(env): The environment variable config item will be saved with real value in SaveConfigFile Function.
+func (c *IniConfigContainer) SaveConfigFile(filename string) (err error) {
+	// Write configuration file by filename.
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	// Get section or key comments. Fixed #1607
+	getCommentStr := func(section, key string) string {
+		var (
+			comment string
+			ok      bool
+		)
+		if len(key) == 0 {
+			comment, ok = c.sectionComment[section]
+		} else {
+			comment, ok = c.keyComment[section+"."+key]
+		}
+
+		if ok {
+			// Empty comment
+			if len(comment) == 0 || len(strings.TrimSpace(comment)) == 0 {
+				return string(bNumComment)
+			}
+			prefix := string(bNumComment)
+			// Add the line head character "#"
+			return prefix + strings.Replace(comment, lineBreak, lineBreak+prefix, -1)
+		}
+		return ""
+	}
+
+	buf := bytes.NewBuffer(nil)
+	// Save default section at first place
+	if dt, ok := c.data[defaultSection]; ok {
+		for key, val := range dt {
+			if key != " " {
+				// Write key comments.
+				if v := getCommentStr(defaultSection, key); len(v) > 0 {
+					if _, err = buf.WriteString(v + lineBreak); err != nil {
+						return err
+					}
+				}
+
+				// Write key and value.
+				if _, err = buf.WriteString(key + string(bEqual) + val + lineBreak); err != nil {
+					return err
+				}
+			}
+		}
+
+		// Put a line between sections.
+		if _, err = buf.WriteString(lineBreak); err != nil {
+			return err
+		}
+	}
+	// Save named sections
+	for section, dt := range c.data {
+		if section != defaultSection {
+			// Write section comments.
+			if v := getCommentStr(section, ""); len(v) > 0 {
+				if _, err = buf.WriteString(v + lineBreak); err != nil {
+					return err
+				}
+			}
+
+			// Write section name.
+			if _, err = buf.WriteString(string(sectionStart) + section + string(sectionEnd) + lineBreak); err != nil {
+				return err
+			}
+
+			for key, val := range dt {
+				if key != " " {
+					// Write key comments.
+					if v := getCommentStr(section, key); len(v) > 0 {
+						if _, err = buf.WriteString(v + lineBreak); err != nil {
+							return err
+						}
+					}
+
+					// Write key and value.
+					if _, err = buf.WriteString(key + string(bEqual) + val + lineBreak); err != nil {
+						return err
+					}
+				}
+			}
+
+			// Put a line between sections.
+			if _, err = buf.WriteString(lineBreak); err != nil {
+				return err
+			}
+		}
+	}
+	_, err = buf.WriteTo(f)
+	return err
+}
+
+// Set writes a new value for key.
+// if write to one section, the key need be "section::key".
+// if the section is not existed, it panics.
+func (c *IniConfigContainer) Set(key, value string) error {
+	c.Lock()
+	defer c.Unlock()
+	if len(key) == 0 {
+		return errors.New("key is empty")
+	}
+
+	var (
+		section, k string
+		sectionKey = strings.Split(strings.ToLower(key), "::")
+	)
+
+	if len(sectionKey) >= 2 {
+		section = sectionKey[0]
+		k = sectionKey[1]
+	} else {
+		section = defaultSection
+		k = sectionKey[0]
+	}
+
+	if _, ok := c.data[section]; !ok {
+		c.data[section] = make(map[string]string)
+	}
+	c.data[section][k] = value
+	return nil
+}
+
+// DIY returns the raw value by a given key.
+func (c *IniConfigContainer) DIY(key string) (v interface{}, err error) {
+	if v, ok := c.data[strings.ToLower(key)]; ok {
+		return v, nil
+	}
+	return v, errors.New("key not find")
+}
+
+// section.key or key
+func (c *IniConfigContainer) getdata(key string) string {
+	if len(key) == 0 {
+		return ""
+	}
+	c.RLock()
+	defer c.RUnlock()
+
+	var (
+		section, k string
+		sectionKey = strings.Split(strings.ToLower(key), "::")
+	)
+	if len(sectionKey) >= 2 {
+		section = sectionKey[0]
+		k = sectionKey[1]
+	} else {
+		section = defaultSection
+		k = sectionKey[0]
+	}
+	if v, ok := c.data[section]; ok {
+		if vv, ok := v[k]; ok {
+			return vv
+		}
+	}
+	return ""
+}
+
+func init() {
+	Register("ini", &IniConfig{})
+}

pkg/infrastructure/config/ini_test.go

@@ -0,0 +1,190 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestIni(t *testing.T) {
+
+	var (
+		inicontext = `
+;comment one
+#comment two
+appname = beeapi
+httpport = 8080
+mysqlport = 3600
+PI = 3.1415976
+runmode = "dev"
+autorender = false
+copyrequestbody = true
+session= on
+cookieon= off
+newreg = OFF
+needlogin = ON
+enableSession = Y
+enableCookie = N
+flag = 1
+path1 = ${GOPATH}
+path2 = ${GOPATH||/home/go}
+[demo]
+key1="asta"
+key2 = "xie"
+CaseInsensitive = true
+peers = one;two;three
+password = ${GOPATH}
+`
+
+		keyValue = map[string]interface{}{
+			"appname":               "beeapi",
+			"httpport":              8080,
+			"mysqlport":             int64(3600),
+			"pi":                    3.1415976,
+			"runmode":               "dev",
+			"autorender":            false,
+			"copyrequestbody":       true,
+			"session":               true,
+			"cookieon":              false,
+			"newreg":                false,
+			"needlogin":             true,
+			"enableSession":         true,
+			"enableCookie":          false,
+			"flag":                  true,
+			"path1":                 os.Getenv("GOPATH"),
+			"path2":                 os.Getenv("GOPATH"),
+			"demo::key1":            "asta",
+			"demo::key2":            "xie",
+			"demo::CaseInsensitive": true,
+			"demo::peers":           []string{"one", "two", "three"},
+			"demo::password":        os.Getenv("GOPATH"),
+			"null":                  "",
+			"demo2::key1":           "",
+			"error":                 "",
+			"emptystrings":          []string{},
+		}
+	)
+
+	f, err := os.Create("testini.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(inicontext)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove("testini.conf")
+	iniconf, err := NewConfig("ini", "testini.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for k, v := range keyValue {
+		var err error
+		var value interface{}
+		switch v.(type) {
+		case int:
+			value, err = iniconf.Int(k)
+		case int64:
+			value, err = iniconf.Int64(k)
+		case float64:
+			value, err = iniconf.Float(k)
+		case bool:
+			value, err = iniconf.Bool(k)
+		case []string:
+			value = iniconf.Strings(k)
+		case string:
+			value = iniconf.String(k)
+		default:
+			value, err = iniconf.DIY(k)
+		}
+		if err != nil {
+			t.Fatalf("get key %q value fail,err %s", k, err)
+		} else if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", value) {
+			t.Fatalf("get key %q value, want %v got %v .", k, v, value)
+		}
+
+	}
+	if err = iniconf.Set("name", "astaxie"); err != nil {
+		t.Fatal(err)
+	}
+	if iniconf.String("name") != "astaxie" {
+		t.Fatal("get name error")
+	}
+
+}
+
+func TestIniSave(t *testing.T) {
+
+	const (
+		inicontext = `
+app = app
+;comment one
+#comment two
+# comment three
+appname = beeapi
+httpport = 8080
+# DB Info
+# enable db
+[dbinfo]
+# db type name
+# suport mysql,sqlserver
+name = mysql
+`
+
+		saveResult = `
+app=app
+#comment one
+#comment two
+# comment three
+appname=beeapi
+httpport=8080
+
+# DB Info
+# enable db
+[dbinfo]
+# db type name
+# suport mysql,sqlserver
+name=mysql
+`
+	)
+	cfg, err := NewConfigData("ini", []byte(inicontext))
+	if err != nil {
+		t.Fatal(err)
+	}
+	name := "newIniConfig.ini"
+	if err := cfg.SaveConfigFile(name); err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(name)
+
+	if data, err := ioutil.ReadFile(name); err != nil {
+		t.Fatal(err)
+	} else {
+		cfgData := string(data)
+		datas := strings.Split(saveResult, "\n")
+		for _, line := range datas {
+			if !strings.Contains(cfgData, line+"\n") {
+				t.Fatalf("different after save ini config file. need contains %q", line)
+			}
+		}
+
+	}
+}

pkg/infrastructure/config/json/json.go

@@ -0,0 +1,272 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package json
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+)
+
+// JSONConfig is a json config parser and implements Config interface.
+type JSONConfig struct {
+}
+
+// Parse returns a ConfigContainer with parsed json config map.
+func (js *JSONConfig) Parse(filename string) (config.Configer, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	content, err := ioutil.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	return js.ParseData(content)
+}
+
+// ParseData returns a ConfigContainer with json string
+func (js *JSONConfig) ParseData(data []byte) (config.Configer, error) {
+	x := &JSONConfigContainer{
+		data: make(map[string]interface{}),
+	}
+	err := json.Unmarshal(data, &x.data)
+	if err != nil {
+		var wrappingArray []interface{}
+		err2 := json.Unmarshal(data, &wrappingArray)
+		if err2 != nil {
+			return nil, err
+		}
+		x.data["rootArray"] = wrappingArray
+	}
+
+	x.data = config.ExpandValueEnvForMap(x.data)
+
+	return x, nil
+}
+
+// JSONConfigContainer is a config which represents the json configuration.
+// Only when get value, support key as section:name type.
+type JSONConfigContainer struct {
+	config.BaseConfiger
+	data map[string]interface{}
+	sync.RWMutex
+}
+
+// Bool returns the boolean value for a given key.
+func (c *JSONConfigContainer) Bool(key string) (bool, error) {
+	val := c.getData(key)
+	if val != nil {
+		return config.ParseBool(val)
+	}
+	return false, fmt.Errorf("not exist key: %q", key)
+}
+
+// DefaultBool return the bool value if has no error
+// otherwise return the defaultval
+func (c *JSONConfigContainer) DefaultBool(key string, defaultval bool) bool {
+	if v, err := c.Bool(key); err == nil {
+		return v
+	}
+	return defaultval
+}
+
+// Int returns the integer value for a given key.
+func (c *JSONConfigContainer) Int(key string) (int, error) {
+	val := c.getData(key)
+	if val != nil {
+		if v, ok := val.(float64); ok {
+			return int(v), nil
+		} else if v, ok := val.(string); ok {
+			return strconv.Atoi(v)
+		}
+		return 0, errors.New("not valid value")
+	}
+	return 0, errors.New("not exist key:" + key)
+}
+
+// DefaultInt returns the integer value for a given key.
+// if err != nil return defaultval
+func (c *JSONConfigContainer) DefaultInt(key string, defaultval int) int {
+	if v, err := c.Int(key); err == nil {
+		return v
+	}
+	return defaultval
+}
+
+// Int64 returns the int64 value for a given key.
+func (c *JSONConfigContainer) Int64(key string) (int64, error) {
+	val := c.getData(key)
+	if val != nil {
+		if v, ok := val.(float64); ok {
+			return int64(v), nil
+		}
+		return 0, errors.New("not int64 value")
+	}
+	return 0, errors.New("not exist key:" + key)
+}
+
+// DefaultInt64 returns the int64 value for a given key.
+// if err != nil return defaultval
+func (c *JSONConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
+	if v, err := c.Int64(key); err == nil {
+		return v
+	}
+	return defaultval
+}
+
+// Float returns the float value for a given key.
+func (c *JSONConfigContainer) Float(key string) (float64, error) {
+	val := c.getData(key)
+	if val != nil {
+		if v, ok := val.(float64); ok {
+			return v, nil
+		}
+		return 0.0, errors.New("not float64 value")
+	}
+	return 0.0, errors.New("not exist key:" + key)
+}
+
+// DefaultFloat returns the float64 value for a given key.
+// if err != nil return defaultval
+func (c *JSONConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
+	if v, err := c.Float(key); err == nil {
+		return v
+	}
+	return defaultval
+}
+
+// String returns the string value for a given key.
+func (c *JSONConfigContainer) String(key string) string {
+	val := c.getData(key)
+	if val != nil {
+		if v, ok := val.(string); ok {
+			return v
+		}
+	}
+	return ""
+}
+
+// DefaultString returns the string value for a given key.
+// if err != nil return defaultval
+func (c *JSONConfigContainer) DefaultString(key string, defaultval string) string {
+	// TODO FIXME should not use "" to replace non existence
+	if v := c.String(key); v != "" {
+		return v
+	}
+	return defaultval
+}
+
+// Strings returns the []string value for a given key.
+func (c *JSONConfigContainer) Strings(key string) []string {
+	stringVal := c.String(key)
+	if stringVal == "" {
+		return nil
+	}
+	return strings.Split(c.String(key), ";")
+}
+
+// DefaultStrings returns the []string value for a given key.
+// if err != nil return defaultval
+func (c *JSONConfigContainer) DefaultStrings(key string, defaultval []string) []string {
+	if v := c.Strings(key); v != nil {
+		return v
+	}
+	return defaultval
+}
+
+// GetSection returns map for the given section
+func (c *JSONConfigContainer) GetSection(section string) (map[string]string, error) {
+	if v, ok := c.data[section]; ok {
+		return v.(map[string]string), nil
+	}
+	return nil, errors.New("nonexist section " + section)
+}
+
+// SaveConfigFile save the config into file
+func (c *JSONConfigContainer) SaveConfigFile(filename string) (err error) {
+	// Write configuration file by filename.
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	b, err := json.MarshalIndent(c.data, "", "  ")
+	if err != nil {
+		return err
+	}
+	_, err = f.Write(b)
+	return err
+}
+
+// Set writes a new value for key.
+func (c *JSONConfigContainer) 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 *JSONConfigContainer) DIY(key string) (v interface{}, err error) {
+	val := c.getData(key)
+	if val != nil {
+		return val, nil
+	}
+	return nil, errors.New("not exist key")
+}
+
+// section.key or key
+func (c *JSONConfigContainer) getData(key string) interface{} {
+	if len(key) == 0 {
+		return nil
+	}
+
+	c.RLock()
+	defer c.RUnlock()
+
+	sectionKeys := strings.Split(key, "::")
+	if len(sectionKeys) >= 2 {
+		curValue, ok := c.data[sectionKeys[0]]
+		if !ok {
+			return nil
+		}
+		for _, key := range sectionKeys[1:] {
+			if v, ok := curValue.(map[string]interface{}); ok {
+				if curValue, ok = v[key]; !ok {
+					return nil
+				}
+			}
+		}
+		return curValue
+	}
+	if v, ok := c.data[key]; ok {
+		return v
+	}
+	return nil
+}
+
+func init() {
+	config.Register("json", &JSONConfig{})
+}

pkg/infrastructure/config/json/json_test.go

@@ -0,0 +1,224 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package json
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+)
+
+func TestJsonStartsWithArray(t *testing.T) {
+
+	const jsoncontextwitharray = `[
+	{
+		"url": "user",
+		"serviceAPI": "http://www.test.com/user"
+	},
+	{
+		"url": "employee",
+		"serviceAPI": "http://www.test.com/employee"
+	}
+]`
+	f, err := os.Create("testjsonWithArray.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(jsoncontextwitharray)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove("testjsonWithArray.conf")
+	jsonconf, err := config.NewConfig("json", "testjsonWithArray.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	rootArray, err := jsonconf.DIY("rootArray")
+	if err != nil {
+		t.Error("array does not exist as element")
+	}
+	rootArrayCasted := rootArray.([]interface{})
+	if rootArrayCasted == nil {
+		t.Error("array from root is nil")
+	} else {
+		elem := rootArrayCasted[0].(map[string]interface{})
+		if elem["url"] != "user" || elem["serviceAPI"] != "http://www.test.com/user" {
+			t.Error("array[0] values are not valid")
+		}
+
+		elem2 := rootArrayCasted[1].(map[string]interface{})
+		if elem2["url"] != "employee" || elem2["serviceAPI"] != "http://www.test.com/employee" {
+			t.Error("array[1] values are not valid")
+		}
+	}
+}
+
+func TestJson(t *testing.T) {
+
+	var (
+		jsoncontext = `{
+"appname": "beeapi",
+"testnames": "foo;bar",
+"httpport": 8080,
+"mysqlport": 3600,
+"PI": 3.1415976, 
+"runmode": "dev",
+"autorender": false,
+"copyrequestbody": true,
+"session": "on",
+"cookieon": "off",
+"newreg": "OFF",
+"needlogin": "ON",
+"enableSession": "Y",
+"enableCookie": "N",
+"flag": 1,
+"path1": "${GOPATH}",
+"path2": "${GOPATH||/home/go}",
+"database": {
+        "host": "host",
+        "port": "port",
+        "database": "database",
+        "username": "username",
+        "password": "${GOPATH}",
+		"conns":{
+			"maxconnection":12,
+			"autoconnect":true,
+			"connectioninfo":"info",
+			"root": "${GOPATH}"
+		}
+    }
+}`
+		keyValue = map[string]interface{}{
+			"appname":                         "beeapi",
+			"testnames":                       []string{"foo", "bar"},
+			"httpport":                        8080,
+			"mysqlport":                       int64(3600),
+			"PI":                              3.1415976,
+			"runmode":                         "dev",
+			"autorender":                      false,
+			"copyrequestbody":                 true,
+			"session":                         true,
+			"cookieon":                        false,
+			"newreg":                          false,
+			"needlogin":                       true,
+			"enableSession":                   true,
+			"enableCookie":                    false,
+			"flag":                            true,
+			"path1":                           os.Getenv("GOPATH"),
+			"path2":                           os.Getenv("GOPATH"),
+			"database::host":                  "host",
+			"database::port":                  "port",
+			"database::database":              "database",
+			"database::password":              os.Getenv("GOPATH"),
+			"database::conns::maxconnection":  12,
+			"database::conns::autoconnect":    true,
+			"database::conns::connectioninfo": "info",
+			"database::conns::root":           os.Getenv("GOPATH"),
+			"unknown":                         "",
+		}
+	)
+
+	f, err := os.Create("testjson.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(jsoncontext)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove("testjson.conf")
+	jsonconf, err := config.NewConfig("json", "testjson.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for k, v := range keyValue {
+		var err error
+		var value interface{}
+		switch v.(type) {
+		case int:
+			value, err = jsonconf.Int(k)
+		case int64:
+			value, err = jsonconf.Int64(k)
+		case float64:
+			value, err = jsonconf.Float(k)
+		case bool:
+			value, err = jsonconf.Bool(k)
+		case []string:
+			value = jsonconf.Strings(k)
+		case string:
+			value = jsonconf.String(k)
+		default:
+			value, err = jsonconf.DIY(k)
+		}
+		if err != nil {
+			t.Fatalf("get key %q value fatal,%v err %s", k, v, err)
+		} else if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", value) {
+			t.Fatalf("get key %q value, want %v got %v .", k, v, value)
+		}
+
+	}
+	if err = jsonconf.Set("name", "astaxie"); err != nil {
+		t.Fatal(err)
+	}
+	if jsonconf.String("name") != "astaxie" {
+		t.Fatal("get name error")
+	}
+
+	if db, err := jsonconf.DIY("database"); err != nil {
+		t.Fatal(err)
+	} else if m, ok := db.(map[string]interface{}); !ok {
+		t.Log(db)
+		t.Fatal("db not map[string]interface{}")
+	} else {
+		if m["host"].(string) != "host" {
+			t.Fatal("get host err")
+		}
+	}
+
+	if _, err := jsonconf.Int("unknown"); err == nil {
+		t.Error("unknown keys should return an error when expecting an Int")
+	}
+
+	if _, err := jsonconf.Int64("unknown"); err == nil {
+		t.Error("unknown keys should return an error when expecting an Int64")
+	}
+
+	if _, err := jsonconf.Float("unknown"); err == nil {
+		t.Error("unknown keys should return an error when expecting a Float")
+	}
+
+	if _, err := jsonconf.DIY("unknown"); err == nil {
+		t.Error("unknown keys should return an error when expecting an interface{}")
+	}
+
+	if val := jsonconf.String("unknown"); val != "" {
+		t.Error("unknown keys should return an empty string when expecting a String")
+	}
+
+	if _, err := jsonconf.Bool("unknown"); err == nil {
+		t.Error("unknown keys should return an error when expecting a Bool")
+	}
+
+	if !jsonconf.DefaultBool("unknown", true) {
+		t.Error("unknown keys with default value wrong")
+	}
+}

pkg/infrastructure/config/xml/xml.go

@@ -0,0 +1,229 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package xml for config provider.
+//
+// depend on github.com/beego/x2j.
+//
+// go install github.com/beego/x2j.
+//
+// Usage:
+//  import(
+//    _ "github.com/astaxie/beego/config/xml"
+//      "github.com/astaxie/beego/config"
+//  )
+//
+//  cnf, err := config.NewConfig("xml", "config.xml")
+//
+//More docs http://beego.me/docs/module/config.md
+package xml
+
+import (
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+	"github.com/beego/x2j"
+)
+
+// Config is a xml config parser and implements Config interface.
+// xml configurations should be included in <config></config> tag.
+// only support key/value pair as <key>value</key> as each item.
+type Config struct{}
+
+// Parse returns a ConfigContainer with parsed xml config map.
+func (xc *Config) Parse(filename string) (config.Configer, error) {
+	context, err := ioutil.ReadFile(filename)
+	if err != nil {
+		return nil, err
+	}
+
+	return xc.ParseData(context)
+}
+
+// ParseData xml data
+func (xc *Config) ParseData(data []byte) (config.Configer, error) {
+	x := &ConfigContainer{data: make(map[string]interface{})}
+
+	d, err := x2j.DocToMap(string(data))
+	if err != nil {
+		return nil, err
+	}
+
+	x.data = config.ExpandValueEnvForMap(d["config"].(map[string]interface{}))
+
+	return x, nil
+}
+
+// ConfigContainer is a Config which represents the xml configuration.
+type ConfigContainer struct {
+	config.BaseConfiger
+	data map[string]interface{}
+	sync.Mutex
+}
+
+// Bool returns the boolean value for a given key.
+func (c *ConfigContainer) Bool(key string) (bool, error) {
+	if v := c.data[key]; v != nil {
+		return config.ParseBool(v)
+	}
+	return false, fmt.Errorf("not exist key: %q", key)
+}
+
+// DefaultBool return the bool value if has no error
+// otherwise return the defaultval
+func (c *ConfigContainer) DefaultBool(key string, defaultval bool) bool {
+	v, err := c.Bool(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int returns the integer value for a given key.
+func (c *ConfigContainer) Int(key string) (int, error) {
+	return strconv.Atoi(c.data[key].(string))
+}
+
+// DefaultInt returns the integer value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultInt(key string, defaultval int) int {
+	v, err := c.Int(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int64 returns the int64 value for a given key.
+func (c *ConfigContainer) Int64(key string) (int64, error) {
+	return strconv.ParseInt(c.data[key].(string), 10, 64)
+}
+
+// DefaultInt64 returns the int64 value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
+	v, err := c.Int64(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+
+}
+
+// Float returns the float value for a given key.
+func (c *ConfigContainer) Float(key string) (float64, error) {
+	return strconv.ParseFloat(c.data[key].(string), 64)
+}
+
+// DefaultFloat returns the float64 value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
+	v, err := c.Float(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// String returns the string value for a given key.
+func (c *ConfigContainer) 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 defaultval
+func (c *ConfigContainer) DefaultString(key string, defaultval string) string {
+	v := c.String(key)
+	if v == "" {
+		return defaultval
+	}
+	return v
+}
+
+// Strings returns the []string value for a given key.
+func (c *ConfigContainer) Strings(key string) []string {
+	v := c.String(key)
+	if v == "" {
+		return nil
+	}
+	return strings.Split(v, ";")
+}
+
+// DefaultStrings returns the []string value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultStrings(key string, defaultval []string) []string {
+	v := c.Strings(key)
+	if v == nil {
+		return defaultval
+	}
+	return v
+}
+
+// GetSection returns map for the given section
+func (c *ConfigContainer) GetSection(section string) (map[string]string, error) {
+	if v, ok := c.data[section].(map[string]interface{}); ok {
+		mapstr := make(map[string]string)
+		for k, val := range v {
+			mapstr[k] = config.ToString(val)
+		}
+		return mapstr, nil
+	}
+	return nil, fmt.Errorf("section '%s' not found", section)
+}
+
+// SaveConfigFile save the config into file
+func (c *ConfigContainer) SaveConfigFile(filename string) (err error) {
+	// Write configuration file by filename.
+	f, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	b, err := xml.MarshalIndent(c.data, "  ", "    ")
+	if err != nil {
+		return err
+	}
+	_, err = f.Write(b)
+	return err
+}
+
+// Set writes a new value for key.
+func (c *ConfigContainer) 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 *ConfigContainer) 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("xml", &Config{})
+}

pkg/infrastructure/config/xml/xml_test.go

@@ -0,0 +1,125 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package xml
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+)
+
+func TestXML(t *testing.T) {
+
+	var (
+		//xml parse should incluce in <config></config> tags
+		xmlcontext = `<?xml version="1.0" encoding="UTF-8"?>
+<config>
+<appname>beeapi</appname>
+<httpport>8080</httpport>
+<mysqlport>3600</mysqlport>
+<PI>3.1415976</PI>
+<runmode>dev</runmode>
+<autorender>false</autorender>
+<copyrequestbody>true</copyrequestbody>
+<path1>${GOPATH}</path1>
+<path2>${GOPATH||/home/go}</path2>
+<mysection>
+<id>1</id>
+<name>MySection</name>
+</mysection>
+</config>
+`
+		keyValue = map[string]interface{}{
+			"appname":         "beeapi",
+			"httpport":        8080,
+			"mysqlport":       int64(3600),
+			"PI":              3.1415976,
+			"runmode":         "dev",
+			"autorender":      false,
+			"copyrequestbody": true,
+			"path1":           os.Getenv("GOPATH"),
+			"path2":           os.Getenv("GOPATH"),
+			"error":           "",
+			"emptystrings":    []string{},
+		}
+	)
+
+	f, err := os.Create("testxml.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(xmlcontext)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove("testxml.conf")
+
+	xmlconf, err := config.NewConfig("xml", "testxml.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var xmlsection map[string]string
+	xmlsection, err = xmlconf.GetSection("mysection")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(xmlsection) == 0 {
+		t.Error("section should not be empty")
+	}
+
+	for k, v := range keyValue {
+
+		var (
+			value interface{}
+			err   error
+		)
+
+		switch v.(type) {
+		case int:
+			value, err = xmlconf.Int(k)
+		case int64:
+			value, err = xmlconf.Int64(k)
+		case float64:
+			value, err = xmlconf.Float(k)
+		case bool:
+			value, err = xmlconf.Bool(k)
+		case []string:
+			value = xmlconf.Strings(k)
+		case string:
+			value = xmlconf.String(k)
+		default:
+			value, err = xmlconf.DIY(k)
+		}
+		if err != nil {
+			t.Errorf("get key %q value fatal,%v err %s", k, v, err)
+		} else if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", value) {
+			t.Errorf("get key %q value, want %v got %v .", k, v, value)
+		}
+
+	}
+
+	if err = xmlconf.Set("name", "astaxie"); err != nil {
+		t.Fatal(err)
+	}
+	if xmlconf.String("name") != "astaxie" {
+		t.Fatal("get name error")
+	}
+}

pkg/infrastructure/config/yaml/yaml.go

@@ -0,0 +1,317 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package yaml for config provider
+//
+// depend on github.com/beego/goyaml2
+//
+// go install github.com/beego/goyaml2
+//
+// Usage:
+//  import(
+//   _ "github.com/astaxie/beego/config/yaml"
+//     "github.com/astaxie/beego/config"
+//  )
+//
+//  cnf, err := config.NewConfig("yaml", "config.yaml")
+//
+//More docs http://beego.me/docs/module/config.md
+package yaml
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+	"sync"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+	"github.com/beego/goyaml2"
+)
+
+// Config is a yaml config parser and implements Config interface.
+type Config struct{}
+
+// Parse returns a ConfigContainer with parsed yaml config map.
+func (yaml *Config) Parse(filename string) (y config.Configer, err error) {
+	cnf, err := ReadYmlReader(filename)
+	if err != nil {
+		return
+	}
+	y = &ConfigContainer{
+		data: cnf,
+	}
+	return
+}
+
+// ParseData parse yaml data
+func (yaml *Config) ParseData(data []byte) (config.Configer, error) {
+	cnf, err := parseYML(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return &ConfigContainer{
+		data: cnf,
+	}, nil
+}
+
+// ReadYmlReader Read yaml file to map.
+// if json like, use json package, unless goyaml2 package.
+func ReadYmlReader(path string) (cnf map[string]interface{}, err error) {
+	buf, err := ioutil.ReadFile(path)
+	if err != nil {
+		return
+	}
+
+	return parseYML(buf)
+}
+
+// parseYML parse yaml formatted []byte to map.
+func parseYML(buf []byte) (cnf map[string]interface{}, err error) {
+	if 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.NewReader(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
+	}
+	cnf = config.ExpandValueEnvForMap(cnf)
+	return
+}
+
+// ConfigContainer is a config which represents the yaml configuration.
+type ConfigContainer struct {
+	config.BaseConfiger
+	data map[string]interface{}
+	sync.RWMutex
+}
+
+// Bool returns the boolean value for a given key.
+func (c *ConfigContainer) Bool(key string) (bool, error) {
+	v, err := c.getData(key)
+	if err != nil {
+		return false, err
+	}
+	return config.ParseBool(v)
+}
+
+// DefaultBool return the bool value if has no error
+// otherwise return the defaultval
+func (c *ConfigContainer) DefaultBool(key string, defaultval bool) bool {
+	v, err := c.Bool(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int returns the integer value for a given key.
+func (c *ConfigContainer) Int(key string) (int, error) {
+	if v, err := c.getData(key); err != nil {
+		return 0, err
+	} else if vv, ok := v.(int); ok {
+		return vv, nil
+	} else if vv, ok := v.(int64); ok {
+		return int(vv), nil
+	}
+	return 0, errors.New("not int value")
+}
+
+// DefaultInt returns the integer value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultInt(key string, defaultval int) int {
+	v, err := c.Int(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Int64 returns the int64 value for a given key.
+func (c *ConfigContainer) Int64(key string) (int64, error) {
+	if v, err := c.getData(key); err != nil {
+		return 0, err
+	} else if vv, ok := v.(int64); ok {
+		return vv, nil
+	}
+	return 0, errors.New("not bool value")
+}
+
+// DefaultInt64 returns the int64 value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultInt64(key string, defaultval int64) int64 {
+	v, err := c.Int64(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// Float returns the float value for a given key.
+func (c *ConfigContainer) Float(key string) (float64, error) {
+	if v, err := c.getData(key); err != nil {
+		return 0.0, err
+	} else if vv, ok := v.(float64); ok {
+		return vv, nil
+	} else if vv, ok := v.(int); ok {
+		return float64(vv), nil
+	} else if vv, ok := v.(int64); ok {
+		return float64(vv), nil
+	}
+	return 0.0, errors.New("not float64 value")
+}
+
+// DefaultFloat returns the float64 value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultFloat(key string, defaultval float64) float64 {
+	v, err := c.Float(key)
+	if err != nil {
+		return defaultval
+	}
+	return v
+}
+
+// String returns the string value for a given key.
+func (c *ConfigContainer) String(key string) string {
+	if v, err := c.getData(key); err == nil {
+		if vv, ok := v.(string); ok {
+			return vv
+		}
+	}
+	return ""
+}
+
+// DefaultString returns the string value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultString(key string, defaultval string) string {
+	v := c.String(key)
+	if v == "" {
+		return defaultval
+	}
+	return v
+}
+
+// Strings returns the []string value for a given key.
+func (c *ConfigContainer) Strings(key string) []string {
+	v := c.String(key)
+	if v == "" {
+		return nil
+	}
+	return strings.Split(v, ";")
+}
+
+// DefaultStrings returns the []string value for a given key.
+// if err != nil return defaultval
+func (c *ConfigContainer) DefaultStrings(key string, defaultval []string) []string {
+	v := c.Strings(key)
+	if v == nil {
+		return defaultval
+	}
+	return v
+}
+
+// GetSection returns map for the given section
+func (c *ConfigContainer) GetSection(section string) (map[string]string, error) {
+
+	if v, ok := c.data[section]; ok {
+		return v.(map[string]string), nil
+	}
+	return nil, errors.New("not exist section")
+}
+
+// SaveConfigFile save the config into file
+func (c *ConfigContainer) 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
+}
+
+// Set writes a new value for key.
+func (c *ConfigContainer) 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 *ConfigContainer) DIY(key string) (v interface{}, err error) {
+	return c.getData(key)
+}
+
+func (c *ConfigContainer) getData(key string) (interface{}, error) {
+
+	if len(key) == 0 {
+		return nil, errors.New("key is empty")
+	}
+	c.RLock()
+	defer c.RUnlock()
+
+	keys := strings.Split(key, ".")
+	tmpData := c.data
+	for idx, k := range keys {
+		if v, ok := tmpData[k]; ok {
+			switch v.(type) {
+			case map[string]interface{}:
+				{
+					tmpData = v.(map[string]interface{})
+					if idx == len(keys)-1 {
+						return tmpData, nil
+					}
+				}
+			default:
+				{
+					return v, nil
+				}
+
+			}
+		}
+	}
+	return nil, fmt.Errorf("not exist key %q", key)
+}
+
+func init() {
+	config.Register("yaml", &Config{})
+}

pkg/infrastructure/config/yaml/yaml_test.go

@@ -0,0 +1,115 @@
+// Copyright 2014 beego Author. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package yaml
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/astaxie/beego/pkg/infrastructure/config"
+)
+
+func TestYaml(t *testing.T) {
+
+	var (
+		yamlcontext = `
+"appname": beeapi
+"httpport": 8080
+"mysqlport": 3600
+"PI": 3.1415976
+"runmode": dev
+"autorender": false
+"copyrequestbody": true
+"PATH": GOPATH
+"path1": ${GOPATH}
+"path2": ${GOPATH||/home/go}
+"empty": "" 
+`
+
+		keyValue = map[string]interface{}{
+			"appname":         "beeapi",
+			"httpport":        8080,
+			"mysqlport":       int64(3600),
+			"PI":              3.1415976,
+			"runmode":         "dev",
+			"autorender":      false,
+			"copyrequestbody": true,
+			"PATH":            "GOPATH",
+			"path1":           os.Getenv("GOPATH"),
+			"path2":           os.Getenv("GOPATH"),
+			"error":           "",
+			"emptystrings":    []string{},
+		}
+	)
+	f, err := os.Create("testyaml.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = f.WriteString(yamlcontext)
+	if err != nil {
+		f.Close()
+		t.Fatal(err)
+	}
+	f.Close()
+	defer os.Remove("testyaml.conf")
+	yamlconf, err := config.NewConfig("yaml", "testyaml.conf")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if yamlconf.String("appname") != "beeapi" {
+		t.Fatal("appname not equal to beeapi")
+	}
+
+	for k, v := range keyValue {
+
+		var (
+			value interface{}
+			err   error
+		)
+
+		switch v.(type) {
+		case int:
+			value, err = yamlconf.Int(k)
+		case int64:
+			value, err = yamlconf.Int64(k)
+		case float64:
+			value, err = yamlconf.Float(k)
+		case bool:
+			value, err = yamlconf.Bool(k)
+		case []string:
+			value = yamlconf.Strings(k)
+		case string:
+			value = yamlconf.String(k)
+		default:
+			value, err = yamlconf.DIY(k)
+		}
+		if err != nil {
+			t.Errorf("get key %q value fatal,%v err %s", k, v, err)
+		} else if fmt.Sprintf("%v", v) != fmt.Sprintf("%v", value) {
+			t.Errorf("get key %q value, want %v got %v .", k, v, value)
+		}
+
+	}
+
+	if err = yamlconf.Set("name", "astaxie"); err != nil {
+		t.Fatal(err)
+	}
+	if yamlconf.String("name") != "astaxie" {
+		t.Fatal("get name error")
+	}
+
+}