Added all required dependencies

vendor/github.com/go-macaron/session/file.go

@@ -0,0 +1,261 @@
+// 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"
+	"io/ioutil"
+	"log"
+	"os"
+	"path"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"github.com/Unknwon/com"
+)
+
+// FileStore represents a file session store implementation.
+type FileStore struct {
+	p    *FileProvider
+	sid  string
+	lock sync.RWMutex
+	data map[interface{}]interface{}
+}
+
+// NewFileStore creates and returns a file session store.
+func NewFileStore(p *FileProvider, sid string, kv map[interface{}]interface{}) *FileStore {
+	return &FileStore{
+		p:    p,
+		sid:  sid,
+		data: kv,
+	}
+}
+
+// Set sets value to given key in session.
+func (s *FileStore) 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 *FileStore) Get(key interface{}) interface{} {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	return s.data[key]
+}
+
+// Delete delete a key from session.
+func (s *FileStore) Delete(key interface{}) error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	delete(s.data, key)
+	return nil
+}
+
+// ID returns current session ID.
+func (s *FileStore) ID() string {
+	return s.sid
+}
+
+// Release releases resource and save data to provider.
+func (s *FileStore) Release() error {
+	s.p.lock.Lock()
+	defer s.p.lock.Unlock()
+
+	data, err := EncodeGob(s.data)
+	if err != nil {
+		return err
+	}
+
+	return ioutil.WriteFile(s.p.filepath(s.sid), data, os.ModePerm)
+}
+
+// Flush deletes all session data.
+func (s *FileStore) Flush() error {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	s.data = make(map[interface{}]interface{})
+	return nil
+}
+
+// FileProvider represents a file session provider implementation.
+type FileProvider struct {
+	lock        sync.RWMutex
+	maxlifetime int64
+	rootPath    string
+}
+
+// Init initializes file session provider with given root path.
+func (p *FileProvider) Init(maxlifetime int64, rootPath string) error {
+	p.lock.Lock()
+	p.maxlifetime = maxlifetime
+	p.rootPath = rootPath
+	p.lock.Unlock()
+	return nil
+}
+
+func (p *FileProvider) filepath(sid string) string {
+	return path.Join(p.rootPath, string(sid[0]), string(sid[1]), sid)
+}
+
+// Read returns raw session store by session ID.
+func (p *FileProvider) Read(sid string) (_ RawStore, err error) {
+	filename := p.filepath(sid)
+	if err = os.MkdirAll(path.Dir(filename), os.ModePerm); err != nil {
+		return nil, err
+	}
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
+	var f *os.File
+	if com.IsFile(filename) {
+		f, err = os.OpenFile(filename, os.O_RDWR, os.ModePerm)
+	} else {
+		f, err = os.Create(filename)
+	}
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	if err = os.Chtimes(filename, time.Now(), time.Now()); err != nil {
+		return nil, err
+	}
+
+	var kv map[interface{}]interface{}
+	data, err := ioutil.ReadAll(f)
+	if err != nil {
+		return nil, err
+	}
+	if len(data) == 0 {
+		kv = make(map[interface{}]interface{})
+	} else {
+		kv, err = DecodeGob(data)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return NewFileStore(p, sid, kv), nil
+}
+
+// Exist returns true if session with given ID exists.
+func (p *FileProvider) Exist(sid string) bool {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+	return com.IsFile(p.filepath(sid))
+}
+
+// Destory deletes a session by session ID.
+func (p *FileProvider) Destory(sid string) error {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	return os.Remove(p.filepath(sid))
+}
+
+func (p *FileProvider) regenerate(oldsid, sid string) (err error) {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+
+	filename := p.filepath(sid)
+	if com.IsExist(filename) {
+		return fmt.Errorf("new sid '%s' already exists", sid)
+	}
+
+	oldname := p.filepath(oldsid)
+	if !com.IsFile(oldname) {
+		data, err := EncodeGob(make(map[interface{}]interface{}))
+		if err != nil {
+			return err
+		}
+		if err = os.MkdirAll(path.Dir(oldname), os.ModePerm); err != nil {
+			return err
+		}
+		if err = ioutil.WriteFile(oldname, data, os.ModePerm); err != nil {
+			return err
+		}
+	}
+
+	if err = os.MkdirAll(path.Dir(filename), os.ModePerm); err != nil {
+		return err
+	}
+	if err = os.Rename(oldname, filename); err != nil {
+		return err
+	}
+	return nil
+}
+
+// Regenerate regenerates a session store from old session ID to new one.
+func (p *FileProvider) Regenerate(oldsid, sid string) (_ RawStore, err error) {
+	if err := p.regenerate(oldsid, sid); err != nil {
+		return nil, err
+	}
+
+	return p.Read(sid)
+}
+
+// Count counts and returns number of sessions.
+func (p *FileProvider) Count() int {
+	count := 0
+	if err := filepath.Walk(p.rootPath, func(path string, fi os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if !fi.IsDir() {
+			count++
+		}
+		return nil
+	}); err != nil {
+		log.Printf("error counting session files: %v", err)
+		return 0
+	}
+	return count
+}
+
+// GC calls GC to clean expired sessions.
+func (p *FileProvider) GC() {
+	p.lock.RLock()
+	defer p.lock.RUnlock()
+
+	if !com.IsExist(p.rootPath) {
+		return
+	}
+
+	if err := filepath.Walk(p.rootPath, func(path string, fi os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if !fi.IsDir() &&
+			(fi.ModTime().Unix()+p.maxlifetime) < time.Now().Unix() {
+			return os.Remove(path)
+		}
+		return nil
+	}); err != nil {
+		log.Printf("error garbage collecting session files: %v", err)
+	}
+}
+
+func init() {
+	Register("file", &FileProvider{})
+}