// 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 redis for session provider // // depend on github.com/gomodule/redigo/redis // // go install github.com/gomodule/redigo/redis // // Usage: // import( // _ "github.com/astaxie/beego/session/redis" // "github.com/astaxie/beego/session" // ) // // func init() { // globalSessions, _ = session.NewManager("redis", ``{"cookieName":"gosessionid","gclifetime":3600,"ProviderConfig":"127.0.0.1:7070"}``) // go globalSessions.GC() // } // // more docs: http://beego.me/docs/module/session.md package redis import ( "net/http" "strconv" "strings" "sync" "time" "github.com/astaxie/beego/session" "github.com/gomodule/redigo/redis" ) var redispder = &Provider{} // MaxPoolSize redis max pool size var MaxPoolSize = 100 // SessionStore redis session store type SessionStore struct { p *redis.Pool sid string lock sync.RWMutex values map[interface{}]interface{} maxlifetime int64 } // Set value in redis 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 redis 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 redis 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 redis session func (rs *SessionStore) Flush() error { rs.lock.Lock() defer rs.lock.Unlock() rs.values = make(map[interface{}]interface{}) return nil } // SessionID get redis session id func (rs *SessionStore) SessionID() string { return rs.sid } // SessionRelease save session values to redis func (rs *SessionStore) SessionRelease(w http.ResponseWriter) { b, err := session.EncodeGob(rs.values) if err != nil { return } c := rs.p.Get() defer c.Close() c.Do("SETEX", rs.sid, rs.maxlifetime, string(b)) } // Provider redis session provider type Provider struct { maxlifetime int64 savePath string poolsize int password string dbNum int poollist *redis.Pool } // SessionInit init redis session // savepath like redis server addr,pool size,password,dbnum,IdleTimeout second // e.g. 127.0.0.1:6379,100,astaxie,0,30 func (rp *Provider) SessionInit(maxlifetime int64, savePath string) error { rp.maxlifetime = maxlifetime configs := strings.Split(savePath, ",") if len(configs) > 0 { rp.savePath = configs[0] } if len(configs) > 1 { poolsize, err := strconv.Atoi(configs[1]) if err != nil || poolsize < 0 { rp.poolsize = MaxPoolSize } else { rp.poolsize = poolsize } } else { rp.poolsize = MaxPoolSize } if len(configs) > 2 { rp.password = configs[2] } if len(configs) > 3 { dbnum, err := strconv.Atoi(configs[3]) if err != nil || dbnum < 0 { rp.dbNum = 0 } else { rp.dbNum = dbnum } } else { rp.dbNum = 0 } var idleTimeout time.Duration = 0 if len(configs) > 4 { timeout, err := strconv.Atoi(configs[4]) if err == nil && timeout > 0 { idleTimeout = time.Duration(timeout) * time.Second } } rp.poollist = &redis.Pool{ Dial: func() (redis.Conn, error) { c, err := redis.Dial("tcp", rp.savePath) if err != nil { return nil, err } if rp.password != "" { if _, err = c.Do("AUTH", rp.password); err != nil { c.Close() return nil, err } } // some redis proxy such as twemproxy is not support select command if rp.dbNum > 0 { _, err = c.Do("SELECT", rp.dbNum) if err != nil { c.Close() return nil, err } } return c, err }, MaxIdle: rp.poolsize, } rp.poollist.IdleTimeout = idleTimeout return rp.poollist.Get().Err() } // SessionRead read redis session by sid func (rp *Provider) SessionRead(sid string) (session.Store, error) { c := rp.poollist.Get() defer c.Close() var kv map[interface{}]interface{} kvs, err := redis.String(c.Do("GET", sid)) if err != nil && err != redis.ErrNil { return nil, err } if len(kvs) == 0 { kv = make(map[interface{}]interface{}) } else { if kv, err = session.DecodeGob([]byte(kvs)); err != nil { return nil, err } } rs := &SessionStore{p: rp.poollist, sid: sid, values: kv, maxlifetime: rp.maxlifetime} return rs, nil } // SessionExist check redis session exist by sid func (rp *Provider) SessionExist(sid string) (bool, error) { c := rp.poollist.Get() defer c.Close() if existed, err := redis.Int(c.Do("EXISTS", sid)); err != nil || existed == 0 { return false, err } return true, nil } // SessionRegenerate generate new sid for redis session func (rp *Provider) SessionRegenerate(oldsid, sid string) (session.Store, error) { c := rp.poollist.Get() defer c.Close() if existed, _ := redis.Int(c.Do("EXISTS", oldsid)); existed == 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.Do("SET", sid, "", "EX", rp.maxlifetime) } else { c.Do("RENAME", oldsid, sid) c.Do("EXPIRE", sid, rp.maxlifetime) } return rp.SessionRead(sid) } // SessionDestroy delete redis session by id func (rp *Provider) SessionDestroy(sid string) error { c := rp.poollist.Get() defer c.Close() c.Do("DEL", sid) return nil } // SessionGC Impelment method, no used. func (rp *Provider) SessionGC() { } // SessionAll return all activeSession func (rp *Provider) SessionAll() int { return 0 } func init() { session.Register("redis", redispder) }