You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

264 lines
5.8 KiB
Go

// Copyright 2013 Beego Authors
// Copyright 2014 Unknwon
//
// 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 ledistore
import (
"bytes"
"encoding/gob"
"fmt"
"reflect"
"time"
"unsafe"
"gitea.com/lunny/log"
"gitea.com/lunny/tango"
"gitea.com/tango/session"
"github.com/siddontang/goredis"
)
var _ session.Store = &LedisStore{}
// Options describes the options for create ledis store
type Options struct {
Host string
Port string
DbIndex int
MaxAge time.Duration
Logger tango.Logger
}
// LedisStore represents a ledis session store implementation.
type LedisStore struct {
Options
client *goredis.Client
}
func preOptions(opts []Options) Options {
var opt Options
if len(opts) > 0 {
opt = opts[0]
}
if opt.Host == "" {
opt.Host = "127.0.0.1"
}
if opt.Port == "" {
opt.Port = "6380"
}
if opt.MaxAge == 0 {
opt.MaxAge = session.DefaultMaxAge
}
if opt.Logger == nil {
opt.Logger = log.Std
}
return opt
}
// New creates and returns a ledis session store.
func New(opts ...Options) (*LedisStore, error) {
opt := preOptions(opts)
var ledis = LedisStore{
Options: opt,
client: goredis.NewClient(opt.Host+":"+opt.Port, ""),
}
if _, err := ledis.Do("PING"); err != nil {
return nil, err
}
_, err := ledis.Do("SELECT", opt.DbIndex)
if err != nil {
return nil, err
}
return &ledis, nil
}
func (c *LedisStore) serialize(value interface{}) ([]byte, error) {
err := c.registerGobConcreteType(value)
if err != nil {
return nil, err
}
if reflect.TypeOf(value).Kind() == reflect.Struct {
return nil, fmt.Errorf("serialize func only take pointer of a struct")
}
var b bytes.Buffer
encoder := gob.NewEncoder(&b)
err = encoder.Encode(&value)
if err != nil {
return nil, err
}
return b.Bytes(), nil
}
func (c *LedisStore) deserialize(byt []byte) (ptr interface{}, err error) {
b := bytes.NewBuffer(byt)
decoder := gob.NewDecoder(b)
var p interface{}
err = decoder.Decode(&p)
if err != nil {
return
}
v := reflect.ValueOf(p)
if v.Kind() == reflect.Struct {
var pp interface{} = &p
datas := reflect.ValueOf(pp).Elem().InterfaceData()
sp := reflect.NewAt(v.Type(),
unsafe.Pointer(datas[1])).Interface()
ptr = sp
} else {
ptr = p
}
return
}
func (c *LedisStore) registerGobConcreteType(value interface{}) error {
t := reflect.TypeOf(value)
switch t.Kind() {
case reflect.Ptr:
v := reflect.ValueOf(value)
i := v.Elem().Interface()
gob.Register(i)
case reflect.Struct, reflect.Map, reflect.Slice:
gob.Register(value)
case reflect.String, reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Bool, reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128:
// do nothing since already registered known type
default:
return fmt.Errorf("unhandled type: %v", t)
}
return nil
}
// Do execute command
func (s *LedisStore) Do(cmd string, args ...interface{}) (interface{}, error) {
conn, err := s.client.Get()
if err != nil {
return nil, err
}
defer conn.Close()
return conn.Do(cmd, args...)
}
// Set sets value to given key in session.
func (s *LedisStore) Set(id session.Id, key string, val interface{}) error {
bs, err := s.serialize(val)
if err != nil {
return err
}
_, err = s.Do("HSET", id, key, bs)
if err == nil {
// when write data, reset maxage
_, err = s.Do("HEXPIRE", id, int64(s.MaxAge.Seconds()))
}
return err
}
// Get gets value by given key in session.
func (s *LedisStore) Get(id session.Id, key string) interface{} {
val, err := s.Do("HGET", id, key)
if err != nil {
s.Logger.Errorf("ledis HGET failed: %s", err)
return nil
}
// when read data, reset maxage
s.Do("HEXPIRE", id, int64(s.MaxAge.Seconds()))
item, err := goredis.Bytes(val, err)
if err != nil {
if err == goredis.ErrNil {
return nil
}
s.Logger.Errorf("redis.Bytes failed: %s", err)
return nil
}
value, err := s.deserialize(item)
if err != nil {
s.Logger.Errorf("ledis HGET failed: %s", err)
return nil
}
return value
}
// Keys gets all keys of the session.
func (s *LedisStore) Keys(id session.Id) ([]string, error) {
vals, err := s.Do("HKEYS", id)
if err != nil {
return nil, err
}
// when read data, reset maxage
s.Do("HEXPIRE", id, int64(s.MaxAge.Seconds()))
var res = make([]string, 0, len(vals.([]interface{})))
for _, v := range vals.([]interface{}) {
vv := v.([]byte)
if string(vv) != string(id) {
res = append(res, string(vv))
}
}
return res, nil
}
// Delete delete a key from session.
func (s *LedisStore) Del(id session.Id, key string) bool {
_, err := s.Do("HDEL", id, key)
return err == nil
}
func (s *LedisStore) Clear(id session.Id) bool {
_, err := s.Do("HCLEAR", id)
return err == nil
}
func (s *LedisStore) Add(id session.Id) bool {
_, err := s.Do("HSET", id, id, nil)
if err == nil {
// when write data, reset maxage
_, err = s.Do("HEXPIRE", id, int64(s.MaxAge.Seconds()))
}
return err == nil
}
func (s *LedisStore) Exist(id session.Id) bool {
b, err := s.Do("HLEN", id)
v, _ := goredis.Int(b, err)
return v > 0
}
func (s *LedisStore) SetMaxAge(maxAge time.Duration) {
s.MaxAge = maxAge
}
func (s *LedisStore) SetIdMaxAge(id session.Id, maxAge time.Duration) {
if s.Exist(id) {
s.Do("HEXPIRE", id, int64(s.MaxAge.Seconds()))
}
}
func (s *LedisStore) Run() error {
return nil
}