mirror of
https://github.com/astaxie/beego.git
synced 2024-07-05 09:55:11 +00:00
233 lines
5.5 KiB
Go
233 lines
5.5 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package memcache for session provider
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//
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// depend on github.com/bradfitz/gomemcache/memcache
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//
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// go install github.com/bradfitz/gomemcache/memcache
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//
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// Usage:
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// import(
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// _ "github.com/astaxie/beego/session/memcache"
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// "github.com/astaxie/beego/session"
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// )
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//
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// func init() {
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// globalSessions, _ = session.NewManager("memcache", ``{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"127.0.0.1:11211"}``)
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// go globalSessions.GC()
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// }
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//
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// more docs: http://beego.me/docs/module/session.md
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package memcache
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import (
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"net/http"
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"strings"
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"sync"
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"github.com/astaxie/beego/session"
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"github.com/bradfitz/gomemcache/memcache"
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)
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var mempder = &MemProvider{}
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var client *memcache.Client
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// SessionStore memcache session store
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type SessionStore struct {
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sid string
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lock sync.RWMutex
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values map[interface{}]interface{}
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maxlifetime int64
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}
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// Set value in memcache session
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func (rs *SessionStore) Set(key, value interface{}) error {
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rs.lock.Lock()
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defer rs.lock.Unlock()
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rs.values[key] = value
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return nil
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}
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// Get value in memcache session
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func (rs *SessionStore) Get(key interface{}) interface{} {
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rs.lock.RLock()
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defer rs.lock.RUnlock()
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if v, ok := rs.values[key]; ok {
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return v
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}
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return nil
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}
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// Delete value in memcache session
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func (rs *SessionStore) Delete(key interface{}) error {
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rs.lock.Lock()
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defer rs.lock.Unlock()
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delete(rs.values, key)
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return nil
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}
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// Flush clear all values in memcache session
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func (rs *SessionStore) Flush() error {
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rs.lock.Lock()
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defer rs.lock.Unlock()
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rs.values = make(map[interface{}]interface{})
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return nil
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}
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// SessionID get memcache session id
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func (rs *SessionStore) SessionID() string {
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return rs.sid
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}
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// SessionRelease save session values to memcache
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func (rs *SessionStore) SessionRelease(w http.ResponseWriter) {
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b, err := session.EncodeGob(rs.values)
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if err != nil {
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return
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}
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item := memcache.Item{Key: rs.sid, Value: b, Expiration: int32(rs.maxlifetime)}
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client.Set(&item)
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}
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// MemProvider memcache session provider
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type MemProvider struct {
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maxlifetime int64
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conninfo []string
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poolsize int
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password string
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}
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// SessionInit init memcache session
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// savepath like
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// e.g. 127.0.0.1:9090
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func (rp *MemProvider) SessionInit(maxlifetime int64, savePath string) error {
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rp.maxlifetime = maxlifetime
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rp.conninfo = strings.Split(savePath, ";")
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client = memcache.New(rp.conninfo...)
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return nil
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}
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// SessionRead read memcache session by sid
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func (rp *MemProvider) SessionRead(sid string) (session.Store, error) {
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if client == nil {
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if err := rp.connectInit(); err != nil {
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return nil, err
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}
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}
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item, err := client.Get(sid)
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if err != nil && err == memcache.ErrCacheMiss {
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rs := &SessionStore{sid: sid, values: make(map[interface{}]interface{}), maxlifetime: rp.maxlifetime}
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return rs, nil
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}
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var kv map[interface{}]interface{}
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if len(item.Value) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = session.DecodeGob(item.Value)
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if err != nil {
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return nil, err
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}
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}
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rs := &SessionStore{sid: sid, values: kv, maxlifetime: rp.maxlifetime}
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return rs, nil
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}
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// SessionExist check memcache session exist by sid
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func (rp *MemProvider) SessionExist(sid string) bool {
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if client == nil {
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if err := rp.connectInit(); err != nil {
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return false
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}
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}
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if item, err := client.Get(sid); err != nil || len(item.Value) == 0 {
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return false
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}
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return true
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}
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// SessionRegenerate generate new sid for memcache session
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func (rp *MemProvider) SessionRegenerate(oldsid, sid string) (session.Store, error) {
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if client == nil {
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if err := rp.connectInit(); err != nil {
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return nil, err
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}
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}
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var contain []byte
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if item, err := client.Get(sid); err != nil || len(item.Value) == 0 {
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// oldsid doesn't exists, set the new sid directly
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// ignore error here, since if it return error
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// the existed value will be 0
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item.Key = sid
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item.Value = []byte("")
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item.Expiration = int32(rp.maxlifetime)
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client.Set(item)
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} else {
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client.Delete(oldsid)
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item.Key = sid
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item.Expiration = int32(rp.maxlifetime)
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client.Set(item)
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contain = item.Value
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}
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var kv map[interface{}]interface{}
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if len(contain) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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var err error
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kv, err = session.DecodeGob(contain)
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if err != nil {
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return nil, err
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}
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}
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rs := &SessionStore{sid: sid, values: kv, maxlifetime: rp.maxlifetime}
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return rs, nil
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}
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// SessionDestroy delete memcache session by id
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func (rp *MemProvider) SessionDestroy(sid string) error {
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if client == nil {
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if err := rp.connectInit(); err != nil {
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return err
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}
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}
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err := client.Delete(sid)
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if err != nil {
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return err
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}
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return nil
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}
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func (rp *MemProvider) connectInit() error {
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client = memcache.New(rp.conninfo...)
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return nil
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}
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// SessionGC Impelment method, no used.
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func (rp *MemProvider) SessionGC() {
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return
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}
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// SessionAll return all activeSession
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func (rp *MemProvider) SessionAll() int {
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return 0
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}
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func init() {
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session.Register("memcache", mempder)
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}
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