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Code Issues Releases Activity

add comments for session packages, part 1

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This commit is contained in:
傅小黑
2014-01-29 01:05:56 +08:00
parent ab8f8d532a
commit 0e2872324f
3 changed files with 75 additions and 9 deletions
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22
session/sess_file.go
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@ -18,6 +18,7 @@ var (
gcmaxlifetime int64
)
// File session store
type FileSessionStore struct {
f *os.File
sid string
@ -25,6 +26,7 @@ type FileSessionStore struct {
values map[interface{}]interface{}
}
// Set value to file session
func (fs *FileSessionStore) Set(key, value interface{}) error {
fs.lock.Lock()
defer fs.lock.Unlock()
@ -32,6 +34,7 @@ func (fs *FileSessionStore) Set(key, value interface{}) error {
return nil
}
// Get value from file session
func (fs *FileSessionStore) Get(key interface{}) interface{} {
fs.lock.RLock()
defer fs.lock.RUnlock()
@ -43,6 +46,7 @@ func (fs *FileSessionStore) Get(key interface{}) interface{} {
return nil
}
// Delete value in file session by given key
func (fs *FileSessionStore) Delete(key interface{}) error {
fs.lock.Lock()
defer fs.lock.Unlock()
@ -50,6 +54,7 @@ func (fs *FileSessionStore) Delete(key interface{}) error {
return nil
}
// Clean all values in file session
func (fs *FileSessionStore) Flush() error {
fs.lock.Lock()
defer fs.lock.Unlock()
@ -57,10 +62,12 @@ func (fs *FileSessionStore) Flush() error {
return nil
}
// Get file session store id
func (fs *FileSessionStore) SessionID() string {
return fs.sid
}
// Write file session to local file with Gob string
func (fs *FileSessionStore) SessionRelease(w http.ResponseWriter) {
defer fs.f.Close()
b, err := encodeGob(fs.values)
@ -72,17 +79,23 @@ func (fs *FileSessionStore) SessionRelease(w http.ResponseWriter) {
fs.f.Write(b)
}
// File session provider
type FileProvider struct {
maxlifetime int64
savePath string
}
// Init file session provider.
// savePath sets the session files path.
func (fp *FileProvider) SessionInit(maxlifetime int64, savePath string) error {
fp.maxlifetime = maxlifetime
fp.savePath = savePath
return nil
}
// Read file session by sid.
// if file is not exist, create it.
// the file path is generated from sid string.
func (fp *FileProvider) SessionRead(sid string) (SessionStore, error) {
err := os.MkdirAll(path.Join(fp.savePath, string(sid[0]), string(sid[1])), 0777)
if err != nil {
@ -117,6 +130,8 @@ func (fp *FileProvider) SessionRead(sid string) (SessionStore, error) {
return ss, nil
}
// Check file session exist.
// it checkes the file named from sid exist or not.
func (fp *FileProvider) SessionExist(sid string) bool {
_, err := os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
if err == nil {
@ -126,16 +141,20 @@ func (fp *FileProvider) SessionExist(sid string) bool {
}
}
// Remove all files in this save path
func (fp *FileProvider) SessionDestroy(sid string) error {
os.Remove(path.Join(fp.savePath))
return nil
}
// Recycle files in save path
func (fp *FileProvider) SessionGC() {
gcmaxlifetime = fp.maxlifetime
filepath.Walk(fp.savePath, gcpath)
}
// Get active file session number.
// it walks save path to count files.
func (fp *FileProvider) SessionAll() int {
a := &activeSession{}
err := filepath.Walk(fp.savePath, func(path string, f os.FileInfo, err error) error {
@ -148,6 +167,8 @@ func (fp *FileProvider) SessionAll() int {
return a.total
}
// Generate new sid for file session.
// it delete old file and create new file named from new sid.
func (fp *FileProvider) SessionRegenerate(oldsid, sid string) (SessionStore, error) {
err := os.MkdirAll(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1])), 0777)
if err != nil {
@ -197,6 +218,7 @@ func (fp *FileProvider) SessionRegenerate(oldsid, sid string) (SessionStore, err
return ss, nil
}
// remove file in save path if expired
func gcpath(path string, info os.FileInfo, err error) error {
if err != nil {
return err