Reform the ledis_session.go

 package session
 
 import (
-  "net/http"
-  "strconv"
-  "strings"
-  "sync"
-
-  "github.com/astaxie/beego/session"
-  "github.com/siddontang/ledisdb/config"
-  "github.com/siddontang/ledisdb/ledis"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync"
+
+	"github.com/astaxie/beego/session"
+	"github.com/siddontang/ledisdb/config"
+	"github.com/siddontang/ledisdb/ledis"
 )
 
 var ledispder = &LedisProvider{}
@@ -16,165 +16,165 @@ var c *ledis.DB
 
 // ledis session store
 type LedisSessionStore struct {
-  sid         string
-  lock        sync.RWMutex
-  values      map[interface{}]interface{}
-  maxlifetime int64
+	sid         string
+	lock        sync.RWMutex
+	values      map[interface{}]interface{}
+	maxlifetime int64
 }
 
 // set value in ledis session
 func (ls *LedisSessionStore) Set(key, value interface{}) error {
-  ls.lock.Lock()
-  defer ls.lock.Unlock()
-  ls.values[key] = value
-  return nil
+	ls.lock.Lock()
+	defer ls.lock.Unlock()
+	ls.values[key] = value
+	return nil
 }
 
 // get value in ledis session
 func (ls *LedisSessionStore) Get(key interface{}) interface{} {
-  ls.lock.RLock()
-  defer ls.lock.RUnlock()
-  if v, ok := ls.values[key]; ok {
-    return v
-  } else {
-    return nil
-  }
+	ls.lock.RLock()
+	defer ls.lock.RUnlock()
+	if v, ok := ls.values[key]; ok {
+		return v
+	} else {
+		return nil
+	}
 }
 
 // delete value in ledis session
 func (ls *LedisSessionStore) Delete(key interface{}) error {
-  ls.lock.Lock()
-  defer ls.lock.Unlock()
-  delete(ls.values, key)
-  return nil
+	ls.lock.Lock()
+	defer ls.lock.Unlock()
+	delete(ls.values, key)
+	return nil
 }
 
 // clear all values in ledis session
 func (ls *LedisSessionStore) Flush() error {
-  ls.lock.Lock()
-  defer ls.lock.Unlock()
-  ls.values = make(map[interface{}]interface{})
-  return nil
+	ls.lock.Lock()
+	defer ls.lock.Unlock()
+	ls.values = make(map[interface{}]interface{})
+	return nil
 }
 
 // get ledis session id
 func (ls *LedisSessionStore) SessionID() string {
-  return ls.sid
+	return ls.sid
 }
 
 // save session values to ledis
 func (ls *LedisSessionStore) SessionRelease(w http.ResponseWriter) {
-  b, err := session.EncodeGob(ls.values)
-  if err != nil {
-    return
-  }
-  c.Set([]byte(ls.sid), b)
-  c.Expire([]byte(ls.sid), ls.maxlifetime)
+	b, err := session.EncodeGob(ls.values)
+	if err != nil {
+		return
+	}
+	c.Set([]byte(ls.sid), b)
+	c.Expire([]byte(ls.sid), ls.maxlifetime)
 }
 
 // ledis session provider
 type LedisProvider struct {
-  maxlifetime int64
-  savePath    string
-  db          int
+	maxlifetime int64
+	savePath    string
+	db          int
 }
 
 // init ledis session
 // savepath like ledis server saveDataPath,pool size
 // e.g. 127.0.0.1:6379,100,astaxie
 func (lp *LedisProvider) SessionInit(maxlifetime int64, savePath string) error {
-  var err error
-  lp.maxlifetime = maxlifetime
-  configs := strings.Split(savePath, ",")
-  if len(configs) == 1 {
-    lp.savePath = configs[0]
-  } else if len(configs) == 2 {
-    lp.savePath = configs[0]
-    lp.db, err = strconv.Atoi(configs[1])
-    if err != nil {
-      return err
-    }
-  }
-  cfg := new(config.Config)
-  cfg.DataDir = lp.savePath
-  nowLedis, err := ledis.Open(cfg)
-  c, err = nowLedis.Select(lp.db)
-  if err != nil {
-    println(err)
-    return nil
-  }
-  return nil
+	var err error
+	lp.maxlifetime = maxlifetime
+	configs := strings.Split(savePath, ",")
+	if len(configs) == 1 {
+		lp.savePath = configs[0]
+	} else if len(configs) == 2 {
+		lp.savePath = configs[0]
+		lp.db, err = strconv.Atoi(configs[1])
+		if err != nil {
+			return err
+		}
+	}
+	cfg := new(config.Config)
+	cfg.DataDir = lp.savePath
+	nowLedis, err := ledis.Open(cfg)
+	c, err = nowLedis.Select(lp.db)
+	if err != nil {
+		println(err)
+		return nil
+	}
+	return nil
 }
 
 // read ledis session by sid
 func (lp *LedisProvider) SessionRead(sid string) (session.SessionStore, error) {
-  kvs, err := c.Get([]byte(sid))
-  var kv map[interface{}]interface{}
-  if len(kvs) == 0 {
-    kv = make(map[interface{}]interface{})
-  } else {
-    kv, err = session.DecodeGob(kvs)
-    if err != nil {
-      return nil, err
-    }
-  }
-  ls := &LedisSessionStore{sid: sid, values: kv, maxlifetime: lp.maxlifetime}
-  return ls, nil
+	kvs, err := c.Get([]byte(sid))
+	var kv map[interface{}]interface{}
+	if len(kvs) == 0 {
+		kv = make(map[interface{}]interface{})
+	} else {
+		kv, err = session.DecodeGob(kvs)
+		if err != nil {
+			return nil, err
+		}
+	}
+	ls := &LedisSessionStore{sid: sid, values: kv, maxlifetime: lp.maxlifetime}
+	return ls, nil
 }
 
 // check ledis session exist by sid
 func (lp *LedisProvider) SessionExist(sid string) bool {
-  count, _ := c.Exists([]byte(sid))
-  if count == 0 {
-    return false
-  } else {
-    return true
-  }
+	count, _ := c.Exists([]byte(sid))
+	if count == 0 {
+		return false
+	} else {
+		return true
+	}
 }
 
 // generate new sid for ledis session
 func (lp *LedisProvider) SessionRegenerate(oldsid, sid string) (session.SessionStore, error) {
-  count, _ := c.Exists([]byte(sid))
-  if count == 0 {
-    // oldsid doesn't exists, set the new sid directly
-    // ignore error here, since if it return error
-    // the existed value will be 0
-    c.Set([]byte(sid), []byte(""))
-    c.Expire([]byte(sid), lp.maxlifetime)
-  } else {
-    data, _ := c.Get([]byte(oldsid))
-    c.Set([]byte(sid), data)
-    c.Expire([]byte(sid), lp.maxlifetime)
-  }
-  kvs, err := c.Get([]byte(sid))
-  var kv map[interface{}]interface{}
-  if len(kvs) == 0 {
-    kv = make(map[interface{}]interface{})
-  } else {
-    kv, err = session.DecodeGob([]byte(kvs))
-    if err != nil {
-      return nil, err
-    }
-  }
-  ls := &LedisSessionStore{sid: sid, values: kv, maxlifetime: lp.maxlifetime}
-  return ls, nil
+	count, _ := c.Exists([]byte(sid))
+	if count == 0 {
+		// oldsid doesn't exists, set the new sid directly
+		// ignore error here, since if it return error
+		// the existed value will be 0
+		c.Set([]byte(sid), []byte(""))
+		c.Expire([]byte(sid), lp.maxlifetime)
+	} else {
+		data, _ := c.Get([]byte(oldsid))
+		c.Set([]byte(sid), data)
+		c.Expire([]byte(sid), lp.maxlifetime)
+	}
+	kvs, err := c.Get([]byte(sid))
+	var kv map[interface{}]interface{}
+	if len(kvs) == 0 {
+		kv = make(map[interface{}]interface{})
+	} else {
+		kv, err = session.DecodeGob([]byte(kvs))
+		if err != nil {
+			return nil, err
+		}
+	}
+	ls := &LedisSessionStore{sid: sid, values: kv, maxlifetime: lp.maxlifetime}
+	return ls, nil
 }
 
 // delete ledis session by id
 func (lp *LedisProvider) SessionDestroy(sid string) error {
-  c.Del([]byte(sid))
-  return nil
+	c.Del([]byte(sid))
+	return nil
 }
 
 // Impelment method, no used.
 func (lp *LedisProvider) SessionGC() {
-  return
+	return
 }
 
 // @todo
 func (lp *LedisProvider) SessionAll() int {
-  return 0
+	return 0
 }
 func init() {
-  session.Register("ledis", ledispder)
+	session.Register("ledis", ledispder)
 }