// 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 memcache for session provider // // depend on github.com/bradfitz/gomemcache/memcache // // go install github.com/bradfitz/gomemcache/memcache // // Usage: // import( // _ "github.com/astaxie/beego/session/memcache" // "github.com/astaxie/beego/session" // ) // // func init() { // globalSessions, _ = session.NewManager("memcache", ``{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"127.0.0.1:11211"}``) // go globalSessions.GC() // } // // more docs: http://beego.me/docs/module/session.md package memcache import ( "net/http" "strings" "sync" "github.com/astaxie/beego/session" "github.com/bradfitz/gomemcache/memcache" ) var mempder = &MemProvider{} var client *memcache.Client // SessionStore memcache session store type SessionStore struct { sid string lock sync.RWMutex values map[interface{}]interface{} maxlifetime int64 } // Set value in memcache session func (rs *SessionStore) Set(key, value interface{}) error { rs.lock.Lock() defer rs.lock.Unlock() rs.values[key] = value return nil } // Get value in memcache session func (rs *SessionStore) Get(key interface{}) interface{} { rs.lock.RLock() defer rs.lock.RUnlock() if v, ok := rs.values[key]; ok { return v } return nil } // Delete value in memcache session func (rs *SessionStore) Delete(key interface{}) error { rs.lock.Lock() defer rs.lock.Unlock() delete(rs.values, key) return nil } // Flush clear all values in memcache session func (rs *SessionStore) Flush() error { rs.lock.Lock() defer rs.lock.Unlock() rs.values = make(map[interface{}]interface{}) return nil } // SessionID get memcache session id func (rs *SessionStore) SessionID() string { return rs.sid } // SessionRelease save session values to memcache func (rs *SessionStore) SessionRelease(w http.ResponseWriter) { b, err := session.EncodeGob(rs.values) if err != nil { return } item := memcache.Item{Key: rs.sid, Value: b, Expiration: int32(rs.maxlifetime)} client.Set(&item) } // MemProvider memcache session provider type MemProvider struct { maxlifetime int64 conninfo []string poolsize int password string } // SessionInit init memcache session // savepath like // e.g. 127.0.0.1:9090 func (rp *MemProvider) SessionInit(maxlifetime int64, savePath string) error { rp.maxlifetime = maxlifetime rp.conninfo = strings.Split(savePath, ";") client = memcache.New(rp.conninfo...) return nil } // SessionRead read memcache session by sid func (rp *MemProvider) SessionRead(sid string) (session.Store, error) { if client == nil { if err := rp.connectInit(); err != nil { return nil, err } } item, err := client.Get(sid) if err != nil { if err == memcache.ErrCacheMiss { rs := &SessionStore{sid: sid, values: make(map[interface{}]interface{}), maxlifetime: rp.maxlifetime} return rs, nil } return nil, err } var kv map[interface{}]interface{} if len(item.Value) == 0 { kv = make(map[interface{}]interface{}) } else { kv, err = session.DecodeGob(item.Value) if err != nil { return nil, err } } rs := &SessionStore{sid: sid, values: kv, maxlifetime: rp.maxlifetime} return rs, nil } // SessionExist check memcache session exist by sid func (rp *MemProvider) SessionExist(sid string) (bool, error) { if client == nil { if err := rp.connectInit(); err != nil { return false, err } } if item, err := client.Get(sid); err != nil || len(item.Value) == 0 { return false, err } return true, nil } // SessionRegenerate generate new sid for memcache session func (rp *MemProvider) SessionRegenerate(oldsid, sid string) (session.Store, error) { if client == nil { if err := rp.connectInit(); err != nil { return nil, err } } var contain []byte if item, err := client.Get(sid); err != nil || len(item.Value) == 0 { // oldsid doesn't exists, set the new sid directly // ignore error here, since if it return error // the existed value will be 0 item.Key = sid item.Value = []byte("") item.Expiration = int32(rp.maxlifetime) client.Set(item) } else { client.Delete(oldsid) item.Key = sid item.Expiration = int32(rp.maxlifetime) client.Set(item) contain = item.Value } var kv map[interface{}]interface{} if len(contain) == 0 { kv = make(map[interface{}]interface{}) } else { var err error kv, err = session.DecodeGob(contain) if err != nil { return nil, err } } rs := &SessionStore{sid: sid, values: kv, maxlifetime: rp.maxlifetime} return rs, nil } // SessionDestroy delete memcache session by id func (rp *MemProvider) SessionDestroy(sid string) error { if client == nil { if err := rp.connectInit(); err != nil { return err } } return client.Delete(sid) } func (rp *MemProvider) connectInit() error { client = memcache.New(rp.conninfo...) return nil } // SessionGC Impelment method, no used. func (rp *MemProvider) SessionGC() { } // SessionAll return all activeSession func (rp *MemProvider) SessionAll() int { return 0 } func init() { session.Register("memcache", mempder) }