mirror of
https://github.com/go-gitea/gitea.git
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204 lines
4.7 KiB
Go
204 lines
4.7 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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"gitea.com/macaron/session"
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"github.com/bradfitz/gomemcache/memcache"
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)
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// MemcacheStore represents a memcache session store implementation.
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type MemcacheStore struct {
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c *memcache.Client
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sid string
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expire int32
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lock sync.RWMutex
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data map[interface{}]interface{}
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}
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// NewMemcacheStore creates and returns a memcache session store.
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func NewMemcacheStore(c *memcache.Client, sid string, expire int32, kv map[interface{}]interface{}) *MemcacheStore {
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return &MemcacheStore{
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c: c,
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sid: sid,
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expire: expire,
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data: kv,
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}
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}
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func NewItem(sid string, data []byte, expire int32) *memcache.Item {
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return &memcache.Item{
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Key: sid,
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Value: data,
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Expiration: expire,
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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 *MemcacheStore) 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 *MemcacheStore) 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 *MemcacheStore) 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 *MemcacheStore) 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 *MemcacheStore) Release() error {
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// Skip encoding if the data is empty
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if len(s.data) == 0 {
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return nil
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}
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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.Set(NewItem(s.sid, data, s.expire))
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}
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// Flush deletes all session data.
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func (s *MemcacheStore) 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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// MemcacheProvider represents a memcache session provider implementation.
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type MemcacheProvider struct {
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c *memcache.Client
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expire int32
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}
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// Init initializes memcache session provider.
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// connStrs: 127.0.0.1:9090;127.0.0.1:9091
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func (p *MemcacheProvider) Init(expire int64, connStrs string) error {
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p.expire = int32(expire)
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p.c = memcache.New(strings.Split(connStrs, ";")...)
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return nil
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}
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// Read returns raw session store by session ID.
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func (p *MemcacheProvider) Read(sid string) (session.RawStore, error) {
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if !p.Exist(sid) {
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if err := p.c.Set(NewItem(sid, []byte(""), p.expire)); 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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item, err := p.c.Get(sid)
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if err != nil {
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return nil, err
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}
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if len(item.Value) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = session.DecodeGob(item.Value)
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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 NewMemcacheStore(p.c, sid, p.expire, 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 *MemcacheProvider) Exist(sid string) bool {
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_, err := p.c.Get(sid)
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return err == nil
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}
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// Destroy deletes a session by session ID.
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func (p *MemcacheProvider) Destroy(sid string) error {
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return p.c.Delete(sid)
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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 *MemcacheProvider) Regenerate(oldsid, sid string) (_ session.RawStore, err error) {
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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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}
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item := NewItem(sid, []byte(""), p.expire)
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if p.Exist(oldsid) {
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item, err = p.c.Get(oldsid)
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if err != nil {
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return nil, err
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} else if err = p.c.Delete(oldsid); err != nil {
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return nil, err
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}
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item.Key = sid
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}
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if err = p.c.Set(item); 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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if len(item.Value) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = session.DecodeGob(item.Value)
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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 NewMemcacheStore(p.c, sid, p.expire, kv), nil
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}
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// Count counts and returns number of sessions.
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func (p *MemcacheProvider) Count() int {
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// FIXME: how come this library does not have Stats method?
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return -1
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}
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// GC calls GC to clean expired sessions.
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func (p *MemcacheProvider) GC() {}
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func init() {
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session.Register("memcache", &MemcacheProvider{})
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}
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