286 lines
7.2 KiB
Go
286 lines
7.2 KiB
Go
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain 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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package session
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import (
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"errors"
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"io"
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"io/ioutil"
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"net/http"
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"os"
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"path"
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"path/filepath"
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"sync"
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"time"
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)
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var (
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filepder = &FileProvider{}
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gcmaxlifetime int64
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)
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// FileSessionStore File session store
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type FileSessionStore struct {
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sid string
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lock sync.RWMutex
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values map[interface{}]interface{}
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}
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// Set value to file session
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func (fs *FileSessionStore) Set(key, value interface{}) error {
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fs.lock.Lock()
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defer fs.lock.Unlock()
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fs.values[key] = value
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return nil
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}
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// Get value from file session
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func (fs *FileSessionStore) Get(key interface{}) interface{} {
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fs.lock.RLock()
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defer fs.lock.RUnlock()
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if v, ok := fs.values[key]; ok {
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return v
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}
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return nil
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}
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// Delete value in file session by given key
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func (fs *FileSessionStore) Delete(key interface{}) error {
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fs.lock.Lock()
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defer fs.lock.Unlock()
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delete(fs.values, key)
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return nil
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}
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// Flush Clean all values in file session
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func (fs *FileSessionStore) Flush() error {
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fs.lock.Lock()
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defer fs.lock.Unlock()
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fs.values = make(map[interface{}]interface{})
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return nil
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}
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// SessionID Get file session store id
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func (fs *FileSessionStore) SessionID() string {
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return fs.sid
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}
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// SessionRelease Write file session to local file with Gob string
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func (fs *FileSessionStore) SessionRelease(w http.ResponseWriter) {
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b, err := EncodeGob(fs.values)
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if err != nil {
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SLogger.Println(err)
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return
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}
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_, err = os.Stat(path.Join(filepder.savePath, string(fs.sid[0]), string(fs.sid[1]), fs.sid))
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var f *os.File
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if err == nil {
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f, err = os.OpenFile(path.Join(filepder.savePath, string(fs.sid[0]), string(fs.sid[1]), fs.sid), os.O_RDWR, 0777)
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SLogger.Println(err)
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} else if os.IsNotExist(err) {
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f, err = os.Create(path.Join(filepder.savePath, string(fs.sid[0]), string(fs.sid[1]), fs.sid))
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SLogger.Println(err)
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} else {
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return
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}
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f.Truncate(0)
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f.Seek(0, 0)
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f.Write(b)
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f.Close()
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}
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// FileProvider File session provider
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type FileProvider struct {
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lock sync.RWMutex
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maxlifetime int64
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savePath string
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}
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// SessionInit Init file session provider.
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// savePath sets the session files path.
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func (fp *FileProvider) SessionInit(maxlifetime int64, savePath string) error {
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fp.maxlifetime = maxlifetime
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fp.savePath = savePath
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return nil
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}
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// SessionRead Read file session by sid.
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// if file is not exist, create it.
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// the file path is generated from sid string.
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func (fp *FileProvider) SessionRead(sid string) (Store, error) {
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filepder.lock.Lock()
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defer filepder.lock.Unlock()
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err := os.MkdirAll(path.Join(fp.savePath, string(sid[0]), string(sid[1])), 0777)
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if err != nil {
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SLogger.Println(err.Error())
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}
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_, err = os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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var f *os.File
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if err == nil {
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f, err = os.OpenFile(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid), os.O_RDWR, 0777)
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} else if os.IsNotExist(err) {
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f, err = os.Create(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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} else {
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return nil, err
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}
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os.Chtimes(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid), time.Now(), time.Now())
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var kv map[interface{}]interface{}
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return nil, err
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}
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if len(b) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = DecodeGob(b)
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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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f.Close()
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ss := &FileSessionStore{sid: sid, values: kv}
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return ss, nil
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}
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// SessionExist Check file session exist.
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// it checkes the file named from sid exist or not.
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func (fp *FileProvider) SessionExist(sid string) bool {
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filepder.lock.Lock()
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defer filepder.lock.Unlock()
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_, err := os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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if err == nil {
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return true
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}
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return false
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}
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// SessionDestroy Remove all files in this save path
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func (fp *FileProvider) SessionDestroy(sid string) error {
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filepder.lock.Lock()
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defer filepder.lock.Unlock()
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os.Remove(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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return nil
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}
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// SessionGC Recycle files in save path
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func (fp *FileProvider) SessionGC() {
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filepder.lock.Lock()
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defer filepder.lock.Unlock()
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gcmaxlifetime = fp.maxlifetime
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filepath.Walk(fp.savePath, gcpath)
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}
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// SessionAll Get active file session number.
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// it walks save path to count files.
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func (fp *FileProvider) SessionAll() int {
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a := &activeSession{}
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err := filepath.Walk(fp.savePath, func(path string, f os.FileInfo, err error) error {
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return a.visit(path, f, err)
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})
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if err != nil {
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SLogger.Printf("filepath.Walk() returned %v\n", err)
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return 0
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}
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return a.total
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}
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// SessionRegenerate Generate new sid for file session.
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// it delete old file and create new file named from new sid.
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func (fp *FileProvider) SessionRegenerate(oldsid, sid string) (Store, error) {
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filepder.lock.Lock()
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defer filepder.lock.Unlock()
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err := os.MkdirAll(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1])), 0777)
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if err != nil {
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SLogger.Println(err.Error())
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}
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err = os.MkdirAll(path.Join(fp.savePath, string(sid[0]), string(sid[1])), 0777)
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if err != nil {
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SLogger.Println(err.Error())
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}
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_, err = os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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var newf *os.File
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if err == nil {
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return nil, errors.New("newsid exist")
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} else if os.IsNotExist(err) {
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newf, err = os.Create(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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}
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_, err = os.Stat(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1]), oldsid))
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var f *os.File
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if err == nil {
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f, err = os.OpenFile(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1]), oldsid), os.O_RDWR, 0777)
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io.Copy(newf, f)
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} else if os.IsNotExist(err) {
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newf, err = os.Create(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
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} else {
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return nil, err
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}
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f.Close()
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os.Remove(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1])))
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os.Chtimes(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid), time.Now(), time.Now())
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var kv map[interface{}]interface{}
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b, err := ioutil.ReadAll(newf)
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if err != nil {
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return nil, err
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}
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if len(b) == 0 {
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kv = make(map[interface{}]interface{})
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} else {
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kv, err = DecodeGob(b)
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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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ss := &FileSessionStore{sid: sid, values: kv}
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return ss, nil
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}
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// remove file in save path if expired
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func gcpath(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.IsDir() {
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return nil
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}
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if (info.ModTime().Unix() + gcmaxlifetime) < time.Now().Unix() {
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os.Remove(path)
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}
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return nil
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}
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type activeSession struct {
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total int
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}
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func (as *activeSession) visit(paths string, f os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if f.IsDir() {
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return nil
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}
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as.total = as.total + 1
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return nil
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}
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func init() {
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Register("file", filepder)
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}
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