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Code Issues Releases Activity

1.add "defer f.close()" in SessionRead to fix file handle leak if DecodeGob failed

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2.rewrite SessionRegenerate
This commit is contained in:
liming 2017-02-09 13:47:24 +08:00
parent dade92d98b
commit 872a964145
1 changed files with 48 additions and 37 deletions
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85
session/sess_file.go
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@ -15,8 +15,7 @@
package session
import (
"errors"
"io"
"fmt"
"io/ioutil"
"net/http"
"os"
@ -135,6 +134,9 @@ func (fp *FileProvider) SessionRead(sid string) (Store, error) {
} else {
return nil, err
}
defer f.Close()
os.Chtimes(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid), time.Now(), time.Now())
var kv map[interface{}]interface{}
b, err := ioutil.ReadAll(f)
@ -149,7 +151,7 @@ func (fp *FileProvider) SessionRead(sid string) (Store, error) {
return nil, err
}
}
f.Close()
ss := &FileSessionStore{sid: sid, values: kv}
return ss, nil
}
@ -204,49 +206,58 @@ func (fp *FileProvider) SessionRegenerate(oldsid, sid string) (Store, error) {
filepder.lock.Lock()
defer filepder.lock.Unlock()
err := os.MkdirAll(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1])), 0777)
if err != nil {
SLogger.Println(err.Error())
}
err = os.MkdirAll(path.Join(fp.savePath, string(sid[0]), string(sid[1])), 0777)
if err != nil {
SLogger.Println(err.Error())
}
_, err = os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
var newf *os.File
oldPath := path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1]))
oldSidFile := path.Join(oldPath, oldsid)
newPath := path.Join(fp.savePath, string(sid[0]), string(sid[1]))
newSidFile := path.Join(newPath, sid)
// new sid file is exist
_, err := os.Stat(newSidFile)
if err == nil {
return nil, errors.New("newsid exist")
} else if os.IsNotExist(err) {
newf, err = os.Create(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
return nil, fmt.Errorf("newsid %s exist", newSidFile)
}
_, err = os.Stat(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1]), oldsid))
var f *os.File
if err == nil {
f, err = os.OpenFile(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1]), oldsid), os.O_RDWR, 0777)
io.Copy(newf, f)
} else if os.IsNotExist(err) {
newf, err = os.Create(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
} else {
return nil, err
}
f.Close()
os.Remove(path.Join(fp.savePath, string(oldsid[0]), string(oldsid[1])))
os.Chtimes(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid), time.Now(), time.Now())
var kv map[interface{}]interface{}
b, err := ioutil.ReadAll(newf)
err = os.MkdirAll(newPath, 0777)
if err != nil {
return nil, err
SLogger.Println(err.Error())
}
if len(b) == 0 {
kv = make(map[interface{}]interface{})
} else {
kv, err = DecodeGob(b)
// if old sid file exist
// 1.read and parse file content
// 2.write content to new sid file
// 3.remove old sid file, change new sid file atime and ctime
// 4.return FileSessionStore
_, err = os.Stat(oldSidFile)
if err == nil {
b, err := ioutil.ReadFile(oldSidFile)
if err != nil {
return nil, err
}
var kv map[interface{}]interface{}
if len(b) == 0 {
kv = make(map[interface{}]interface{})
} else {
kv, err = DecodeGob(b)
if err != nil {
return nil, err
}
}
ioutil.WriteFile(newSidFile, b, 0777)
os.Remove(oldSidFile)
os.Chtimes(newSidFile, time.Now(), time.Now())
ss := &FileSessionStore{sid: sid, values: kv}
return ss, nil
}
ss := &FileSessionStore{sid: sid, values: kv}
// if old sid file not exist, just create new sid file and return
newf, err := os.Create(newSidFile)
if err != nil {
return nil, err
}
newf.Close()
ss := &FileSessionStore{sid: sid, values: make(map[interface{}]interface{})}
return ss, nil
}