Merge pull request #4124 from phiphi282/session_exists_return_err

Update session provider interface to return errors on SessionExist

pkg/session/README.md

@@ -101,7 +101,7 @@ Maybe you will find the **memory** provider is a good example.
 	type Provider interface {
 		SessionInit(gclifetime int64, config string) error
 		SessionRead(sid string) (SessionStore, error)
-		SessionExist(sid string) bool
+		SessionExist(sid string) (bool, error)
 		SessionRegenerate(oldsid, sid string) (SessionStore, error)
 		SessionDestroy(sid string) error
 		SessionAll() int //get all active session

pkg/session/couchbase/sess_couchbase.go

@@ -179,16 +179,16 @@ func (cp *Provider) SessionRead(sid string) (session.Store, error) {
 
 // SessionExist Check couchbase session exist.
 // it checkes sid exist or not.
-func (cp *Provider) SessionExist(sid string) bool {
+func (cp *Provider) SessionExist(sid string) (bool, error) {
 	cp.b = cp.getBucket()
 	defer cp.b.Close()
 
 	var doc []byte
 
 	if err := cp.b.Get(sid, &doc); err != nil || doc == nil {
-		return false
+		return false, err
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate remove oldsid and use sid to generate new session

pkg/session/ledis/ledis_session.go

@@ -132,9 +132,9 @@ func (lp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check ledis session exist by sid
-func (lp *Provider) SessionExist(sid string) bool {
+func (lp *Provider) SessionExist(sid string) (bool, error) {
 	count, _ := c.Exists([]byte(sid))
-	return count != 0
+	return count != 0, nil
 }
 
 // SessionRegenerate generate new sid for ledis session

pkg/session/memcache/sess_memcache.go

@@ -149,16 +149,16 @@ func (rp *MemProvider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check memcache session exist by sid
-func (rp *MemProvider) SessionExist(sid string) bool {
+func (rp *MemProvider) SessionExist(sid string) (bool, error) {
 	if client == nil {
 		if err := rp.connectInit(); err != nil {
-			return false
+			return false, err
 		}
 	}
 	if item, err := client.Get(sid); err != nil || len(item.Value) == 0 {
-		return false
+		return false, err
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for memcache session

pkg/session/mysql/sess_mysql.go

@@ -164,13 +164,19 @@ func (mp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check mysql session exist
-func (mp *Provider) SessionExist(sid string) bool {
+func (mp *Provider) SessionExist(sid string) (bool, error) {
 	c := mp.connectInit()
 	defer c.Close()
 	row := c.QueryRow("select session_data from "+TableName+" where session_key=?", sid)
 	var sessiondata []byte
 	err := row.Scan(&sessiondata)
-	return err != sql.ErrNoRows
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for mysql session

pkg/session/postgres/sess_postgresql.go

@@ -178,13 +178,19 @@ func (mp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check postgresql session exist
-func (mp *Provider) SessionExist(sid string) bool {
+func (mp *Provider) SessionExist(sid string) (bool, error) {
 	c := mp.connectInit()
 	defer c.Close()
 	row := c.QueryRow("select session_data from session where session_key=$1", sid)
 	var sessiondata []byte
 	err := row.Scan(&sessiondata)
-	return err != sql.ErrNoRows
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for postgresql session

pkg/session/redis/sess_redis.go

@@ -211,14 +211,14 @@ func (rp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check redis session exist by sid
-func (rp *Provider) SessionExist(sid string) bool {
+func (rp *Provider) SessionExist(sid string) (bool, error) {
 	c := rp.poollist.Get()
 	defer c.Close()
 
 	if existed, err := redis.Int(c.Do("EXISTS", sid)); err != nil || existed == 0 {
-		return false
+		return false, err
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for redis session

pkg/session/redis_cluster/redis_cluster.go

@@ -176,12 +176,12 @@ func (rp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check redis_cluster session exist by sid
-func (rp *Provider) SessionExist(sid string) bool {
+func (rp *Provider) SessionExist(sid string) (bool, error) {
 	c := rp.poollist
 	if existed, err := c.Exists(sid).Result(); err != nil || existed == 0 {
-		return false
+		return false, err
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for redis_cluster session

pkg/session/redis_sentinel/sess_redis_sentinel.go

@@ -189,12 +189,12 @@ func (rp *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist check redis_sentinel session exist by sid
-func (rp *Provider) SessionExist(sid string) bool {
+func (rp *Provider) SessionExist(sid string) (bool, error) {
 	c := rp.poollist
 	if existed, err := c.Exists(sid).Result(); err != nil || existed == 0 {
-		return false
+		return false, err
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate generate new sid for redis_sentinel session

pkg/session/sess_cookie.go

@@ -147,8 +147,8 @@ func (pder *CookieProvider) SessionRead(sid string) (Store, error) {
 }
 
 // SessionExist Cookie session is always existed
-func (pder *CookieProvider) SessionExist(sid string) bool {
-	return true
+func (pder *CookieProvider) SessionExist(sid string) (bool, error) {
+	return true, nil
 }
 
 // SessionRegenerate Implement method, no used.

pkg/session/sess_file.go

@@ -176,17 +176,17 @@ func (fp *FileProvider) SessionRead(sid string) (Store, error) {
 
 // SessionExist Check file session exist.
 // it checks the file named from sid exist or not.
-func (fp *FileProvider) SessionExist(sid string) bool {
+func (fp *FileProvider) SessionExist(sid string) (bool, error) {
 	filepder.lock.Lock()
 	defer filepder.lock.Unlock()
 
 	if len(sid) < 2 {
-		SLogger.Println("min length of session id is 2", sid)
-		return false
+		SLogger.Println("min length of session id is 2 but got length: ", sid)
+		return false, errors.New("min length of session id is 2")
 	}
 
 	_, err := os.Stat(path.Join(fp.savePath, string(sid[0]), string(sid[1]), sid))
-	return err == nil
+	return err == nil, nil
 }
 
 // SessionDestroy Remove all files in this save path

pkg/session/sess_file_test.go

@@ -56,16 +56,24 @@ func TestFileProvider_SessionExist(t *testing.T) {
 
 	_ = fp.SessionInit(180, sessionPath)
 
-	if fp.SessionExist(sid) {
+	exists, err := fp.SessionExist(sid)
+	if err != nil{
+		t.Error(err)
+	}
+	if exists {
 		t.Error()
 	}
 
-	_, err := fp.SessionRead(sid)
+	_, err = fp.SessionRead(sid)
 	if err != nil {
 		t.Error(err)
 	}
 
-	if !fp.SessionExist(sid) {
+	exists, err = fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if !exists {
 		t.Error()
 	}
 }
@@ -79,15 +87,27 @@ func TestFileProvider_SessionExist2(t *testing.T) {
 
 	_ = fp.SessionInit(180, sessionPath)
 
-	if fp.SessionExist(sid) {
+	exists, err := fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if exists {
 		t.Error()
 	}
 
-	if fp.SessionExist("") {
+	exists, err = fp.SessionExist("")
+	if err == nil {
+		t.Error()
+	}
+	if exists {
 		t.Error()
 	}
 
-	if fp.SessionExist("1") {
+	exists, err = fp.SessionExist("1")
+	if err == nil {
+		t.Error()
+	}
+	if exists {
 		t.Error()
 	}
 }
@@ -171,7 +191,11 @@ func TestFileProvider_SessionRegenerate(t *testing.T) {
 		t.Error(err)
 	}
 
-	if !fp.SessionExist(sid) {
+	exists, err := fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if !exists {
 		t.Error()
 	}
 
@@ -180,11 +204,19 @@ func TestFileProvider_SessionRegenerate(t *testing.T) {
 		t.Error(err)
 	}
 
-	if fp.SessionExist(sid) {
+	exists, err = fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if exists {
 		t.Error()
 	}
 
-	if !fp.SessionExist(sidNew) {
+	exists, err = fp.SessionExist(sidNew)
+	if err != nil {
+		t.Error(err)
+	}
+	if !exists {
 		t.Error()
 	}
 }
@@ -203,7 +235,11 @@ func TestFileProvider_SessionDestroy(t *testing.T) {
 		t.Error(err)
 	}
 
-	if !fp.SessionExist(sid) {
+	exists, err := fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if !exists {
 		t.Error()
 	}
 
@@ -212,7 +248,11 @@ func TestFileProvider_SessionDestroy(t *testing.T) {
 		t.Error(err)
 	}
 
-	if fp.SessionExist(sid) {
+	exists, err = fp.SessionExist(sid)
+	if err != nil {
+		t.Error(err)
+	}
+	if exists {
 		t.Error()
 	}
 }

pkg/session/sess_mem.go

@@ -109,13 +109,13 @@ func (pder *MemProvider) SessionRead(sid string) (Store, error) {
 }
 
 // SessionExist check session store exist in memory session by sid
-func (pder *MemProvider) SessionExist(sid string) bool {
+func (pder *MemProvider) SessionExist(sid string) (bool, error) {
 	pder.lock.RLock()
 	defer pder.lock.RUnlock()
 	if _, ok := pder.sessions[sid]; ok {
-		return true
+		return true, nil
 	}
-	return false
+	return false, nil
 }
 
 // SessionRegenerate generate new sid for session store in memory session

pkg/session/session.go

@@ -56,7 +56,7 @@ type Store interface {
 type Provider interface {
 	SessionInit(gclifetime int64, config string) error
 	SessionRead(sid string) (Store, error)
-	SessionExist(sid string) bool
+	SessionExist(sid string) (bool, error)
 	SessionRegenerate(oldsid, sid string) (Store, error)
 	SessionDestroy(sid string) error
 	SessionAll() int //get all active session
@@ -211,9 +211,15 @@ func (manager *Manager) SessionStart(w http.ResponseWriter, r *http.Request) (se
 		return nil, errs
 	}
 
-	if sid != "" && manager.provider.SessionExist(sid) {
+	if sid != "" {
+		exists, err := manager.provider.SessionExist(sid)
+		if err != nil {
+			return nil, err
+		}
+		if exists {
 			return manager.provider.SessionRead(sid)
 		}
+	}
 
 	// Generate a new session
 	sid, errs = manager.sessionID()

pkg/session/ssdb/sess_ssdb.go

@@ -68,10 +68,10 @@ func (p *Provider) SessionRead(sid string) (session.Store, error) {
 }
 
 // SessionExist judged whether sid is exist in session
-func (p *Provider) SessionExist(sid string) bool {
+func (p *Provider) SessionExist(sid string) (bool, error) {
 	if p.client == nil {
 		if err := p.connectInit(); err != nil {
-			panic(err)
+			return false, err
 		}
 	}
 	value, err := p.client.Get(sid)
@@ -79,9 +79,9 @@ func (p *Provider) SessionExist(sid string) bool {
 		panic(err)
 	}
 	if value == nil || len(value.(string)) == 0 {
-		return false
+		return false, nil
 	}
-	return true
+	return true, nil
 }
 
 // SessionRegenerate regenerate session with new sid and delete oldsid