mirror of
https://codeberg.org/forgejo/forgejo.git
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235 lines
5.5 KiB
Go
235 lines
5.5 KiB
Go
// Copyright 2013 Beego Authors
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// Copyright 2014 The Macaron Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"): you may
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// not use this file except in compliance with the License. You may obtain
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// 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, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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package session
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import (
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"fmt"
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"strings"
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"sync"
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"time"
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"github.com/Unknwon/com"
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"gopkg.in/ini.v1"
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"gopkg.in/redis.v2"
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"github.com/go-macaron/session"
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)
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// RedisStore represents a redis session store implementation.
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type RedisStore struct {
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c *redis.Client
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prefix, sid string
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duration time.Duration
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lock sync.RWMutex
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data map[interface{}]interface{}
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}
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// NewRedisStore creates and returns a redis session store.
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func NewRedisStore(c *redis.Client, prefix, sid string, dur time.Duration, kv map[interface{}]interface{}) *RedisStore {
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return &RedisStore{
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c: c,
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prefix: prefix,
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sid: sid,
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duration: dur,
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data: kv,
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}
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}
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// Set sets value to given key in session.
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func (s *RedisStore) Set(key, val interface{}) error {
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s.lock.Lock()
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defer s.lock.Unlock()
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s.data[key] = val
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return nil
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}
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// Get gets value by given key in session.
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func (s *RedisStore) Get(key interface{}) interface{} {
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s.lock.RLock()
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defer s.lock.RUnlock()
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return s.data[key]
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}
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// Delete delete a key from session.
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func (s *RedisStore) Delete(key interface{}) error {
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s.lock.Lock()
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defer s.lock.Unlock()
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delete(s.data, key)
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return nil
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}
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// ID returns current session ID.
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func (s *RedisStore) ID() string {
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return s.sid
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}
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// Release releases resource and save data to provider.
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func (s *RedisStore) Release() error {
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data, err := session.EncodeGob(s.data)
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if err != nil {
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return err
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}
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return s.c.SetEx(s.prefix+s.sid, s.duration, string(data)).Err()
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}
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// Flush deletes all session data.
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func (s *RedisStore) Flush() error {
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s.lock.Lock()
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defer s.lock.Unlock()
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s.data = make(map[interface{}]interface{})
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return nil
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}
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// RedisProvider represents a redis session provider implementation.
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type RedisProvider struct {
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c *redis.Client
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duration time.Duration
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prefix string
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}
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// Init initializes redis session provider.
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// configs: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,prefix=session;
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func (p *RedisProvider) Init(maxlifetime int64, configs string) (err error) {
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p.duration, err = time.ParseDuration(fmt.Sprintf("%ds", maxlifetime))
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if err != nil {
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return err
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}
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cfg, err := ini.Load([]byte(strings.Replace(configs, ",", "\n", -1)))
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if err != nil {
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return err
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}
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opt := &redis.Options{
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Network: "tcp",
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}
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for k, v := range cfg.Section("").KeysHash() {
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switch k {
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case "network":
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opt.Network = v
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case "addr":
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opt.Addr = v
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case "password":
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opt.Password = v
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case "db":
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opt.DB = com.StrTo(v).MustInt64()
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case "pool_size":
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opt.PoolSize = com.StrTo(v).MustInt()
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case "idle_timeout":
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opt.IdleTimeout, err = time.ParseDuration(v + "s")
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if err != nil {
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return fmt.Errorf("error parsing idle timeout: %v", err)
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}
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case "prefix":
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p.prefix = v
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default:
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return fmt.Errorf("session/redis: unsupported option '%s'", k)
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}
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}
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p.c = redis.NewClient(opt)
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return p.c.Ping().Err()
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}
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// Read returns raw session store by session ID.
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func (p *RedisProvider) Read(sid string) (session.RawStore, error) {
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psid := p.prefix + sid
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if !p.Exist(sid) {
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if err := p.c.Set(psid, "").Err(); err != nil {
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return nil, err
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}
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}
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var kv map[interface{}]interface{}
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kvs, err := p.c.Get(psid).Result()
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if err != nil {
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return nil, err
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}
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if len(kvs) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = session.DecodeGob([]byte(kvs))
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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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return NewRedisStore(p.c, p.prefix, sid, p.duration, kv), nil
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}
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// Exist returns true if session with given ID exists.
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func (p *RedisProvider) Exist(sid string) bool {
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has, err := p.c.Exists(p.prefix + sid).Result()
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return err == nil && has
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}
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// Destory deletes a session by session ID.
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func (p *RedisProvider) Destory(sid string) error {
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return p.c.Del(p.prefix + sid).Err()
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}
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// Regenerate regenerates a session store from old session ID to new one.
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func (p *RedisProvider) Regenerate(oldsid, sid string) (_ session.RawStore, err error) {
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poldsid := p.prefix + oldsid
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psid := p.prefix + sid
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if p.Exist(sid) {
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return nil, fmt.Errorf("new sid '%s' already exists", sid)
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} else if !p.Exist(oldsid) {
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// Make a fake old session.
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if err = p.c.SetEx(poldsid, p.duration, "").Err(); err != nil {
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return nil, err
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}
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}
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if err = p.c.Rename(poldsid, psid).Err(); err != nil {
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return nil, err
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}
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var kv map[interface{}]interface{}
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kvs, err := p.c.Get(psid).Result()
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if err != nil {
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return nil, err
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}
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if len(kvs) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = session.DecodeGob([]byte(kvs))
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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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return NewRedisStore(p.c, p.prefix, sid, p.duration, kv), nil
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}
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// Count counts and returns number of sessions.
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func (p *RedisProvider) Count() int {
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return int(p.c.DbSize().Val())
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}
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// GC calls GC to clean expired sessions.
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func (_ *RedisProvider) GC() {}
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func init() {
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session.Register("redis", &RedisProvider{})
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}
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