227 lines
5.1 KiB
Go
227 lines
5.1 KiB
Go
// Copyright 2013 Beego Authors
|
|
// Copyright 2014 The Macaron Authors
|
|
//
|
|
// 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 session
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
"sync"
|
|
|
|
"gitea.com/go-chi/session"
|
|
"github.com/siddontang/ledisdb/config"
|
|
"github.com/siddontang/ledisdb/ledis"
|
|
"github.com/unknwon/com"
|
|
"gopkg.in/ini.v1"
|
|
)
|
|
|
|
// LedisStore represents a ledis session store implementation.
|
|
type LedisStore struct {
|
|
c *ledis.DB
|
|
sid string
|
|
expire int64
|
|
lock sync.RWMutex
|
|
data map[interface{}]interface{}
|
|
}
|
|
|
|
// NewLedisStore creates and returns a ledis session store.
|
|
func NewLedisStore(c *ledis.DB, sid string, expire int64, kv map[interface{}]interface{}) *LedisStore {
|
|
return &LedisStore{
|
|
c: c,
|
|
expire: expire,
|
|
sid: sid,
|
|
data: kv,
|
|
}
|
|
}
|
|
|
|
// Set sets value to given key in session.
|
|
func (s *LedisStore) Set(key, val interface{}) error {
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
|
|
s.data[key] = val
|
|
return nil
|
|
}
|
|
|
|
// Get gets value by given key in session.
|
|
func (s *LedisStore) Get(key interface{}) interface{} {
|
|
s.lock.RLock()
|
|
defer s.lock.RUnlock()
|
|
|
|
return s.data[key]
|
|
}
|
|
|
|
// Delete delete a key from session.
|
|
func (s *LedisStore) Delete(key interface{}) error {
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
|
|
delete(s.data, key)
|
|
return nil
|
|
}
|
|
|
|
// ID returns current session ID.
|
|
func (s *LedisStore) ID() string {
|
|
return s.sid
|
|
}
|
|
|
|
// Release releases resource and save data to provider.
|
|
func (s *LedisStore) Release() error {
|
|
// Skip encoding if the data is empty
|
|
if len(s.data) == 0 {
|
|
return nil
|
|
}
|
|
|
|
data, err := session.EncodeGob(s.data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = s.c.Set([]byte(s.sid), data); err != nil {
|
|
return err
|
|
}
|
|
_, err = s.c.Expire([]byte(s.sid), s.expire)
|
|
return err
|
|
}
|
|
|
|
// Flush deletes all session data.
|
|
func (s *LedisStore) Flush() error {
|
|
s.lock.Lock()
|
|
defer s.lock.Unlock()
|
|
|
|
s.data = make(map[interface{}]interface{})
|
|
return nil
|
|
}
|
|
|
|
// LedisProvider represents a ledis session provider implementation.
|
|
type LedisProvider struct {
|
|
c *ledis.DB
|
|
expire int64
|
|
}
|
|
|
|
// Init initializes ledis session provider.
|
|
// configs: data_dir=./app.db,db=0
|
|
func (p *LedisProvider) Init(expire int64, configs string) error {
|
|
p.expire = expire
|
|
|
|
cfg, err := ini.Load([]byte(strings.Replace(configs, ",", "\n", -1)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
db := 0
|
|
opt := new(config.Config)
|
|
for k, v := range cfg.Section("").KeysHash() {
|
|
switch k {
|
|
case "data_dir":
|
|
opt.DataDir = v
|
|
case "db":
|
|
db = com.StrTo(v).MustInt()
|
|
default:
|
|
return fmt.Errorf("session/ledis: unsupported option '%s'", k)
|
|
}
|
|
}
|
|
|
|
l, err := ledis.Open(opt)
|
|
if err != nil {
|
|
return fmt.Errorf("session/ledis: error opening db: %v", err)
|
|
}
|
|
p.c, err = l.Select(db)
|
|
return err
|
|
}
|
|
|
|
// Read returns raw session store by session ID.
|
|
func (p *LedisProvider) Read(sid string) (session.RawStore, error) {
|
|
if !p.Exist(sid) {
|
|
if err := p.c.Set([]byte(sid), []byte("")); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
var kv map[interface{}]interface{}
|
|
kvs, err := p.c.Get([]byte(sid))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(kvs) == 0 {
|
|
kv = make(map[interface{}]interface{})
|
|
} else {
|
|
kv, err = session.DecodeGob(kvs)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return NewLedisStore(p.c, sid, p.expire, kv), nil
|
|
}
|
|
|
|
// Exist returns true if session with given ID exists.
|
|
func (p *LedisProvider) Exist(sid string) bool {
|
|
count, err := p.c.Exists([]byte(sid))
|
|
return err == nil && count > 0
|
|
}
|
|
|
|
// Destroy deletes a session by session ID.
|
|
func (p *LedisProvider) Destroy(sid string) error {
|
|
_, err := p.c.Del([]byte(sid))
|
|
return err
|
|
}
|
|
|
|
// Regenerate regenerates a session store from old session ID to new one.
|
|
func (p *LedisProvider) Regenerate(oldsid, sid string) (_ session.RawStore, err error) {
|
|
if p.Exist(sid) {
|
|
return nil, fmt.Errorf("new sid '%s' already exists", sid)
|
|
}
|
|
|
|
kvs := make([]byte, 0)
|
|
if p.Exist(oldsid) {
|
|
if kvs, err = p.c.Get([]byte(oldsid)); err != nil {
|
|
return nil, err
|
|
} else if _, err = p.c.Del([]byte(oldsid)); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if err = p.c.SetEX([]byte(sid), p.expire, kvs); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
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
|
|
}
|
|
}
|
|
|
|
return NewLedisStore(p.c, sid, p.expire, kv), nil
|
|
}
|
|
|
|
// Count counts and returns number of sessions.
|
|
func (p *LedisProvider) Count() int {
|
|
// FIXME: how come this library does not have DbSize() method?
|
|
return -1
|
|
}
|
|
|
|
// GC calls GC to clean expired sessions.
|
|
func (p *LedisProvider) GC() {
|
|
// FIXME: wtf???
|
|
}
|
|
|
|
func init() {
|
|
session.Register("ledis", &LedisProvider{})
|
|
}
|