beego: move dependency module to sub package

session/mysql/sess_mysql.go

@@ -0,0 +1,198 @@
+package session
+
+// mysql session support need create table as sql:
+//	CREATE TABLE `session` (
+//	`session_key` char(64) NOT NULL,
+//	session_data` blob,
+//	`session_expiry` int(11) unsigned NOT NULL,
+//	PRIMARY KEY (`session_key`)
+//	) ENGINE=MyISAM DEFAULT CHARSET=utf8;
+
+import (
+	"database/sql"
+	"net/http"
+	"sync"
+	"time"
+
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var mysqlpder = &MysqlProvider{}
+
+// mysql session store
+type MysqlSessionStore struct {
+	c      *sql.DB
+	sid    string
+	lock   sync.RWMutex
+	values map[interface{}]interface{}
+}
+
+// set value in mysql session.
+// it is temp value in map.
+func (st *MysqlSessionStore) Set(key, value interface{}) error {
+	st.lock.Lock()
+	defer st.lock.Unlock()
+	st.values[key] = value
+	return nil
+}
+
+// get value from mysql session
+func (st *MysqlSessionStore) Get(key interface{}) interface{} {
+	st.lock.RLock()
+	defer st.lock.RUnlock()
+	if v, ok := st.values[key]; ok {
+		return v
+	} else {
+		return nil
+	}
+	return nil
+}
+
+// delete value in mysql session
+func (st *MysqlSessionStore) Delete(key interface{}) error {
+	st.lock.Lock()
+	defer st.lock.Unlock()
+	delete(st.values, key)
+	return nil
+}
+
+// clear all values in mysql session
+func (st *MysqlSessionStore) Flush() error {
+	st.lock.Lock()
+	defer st.lock.Unlock()
+	st.values = make(map[interface{}]interface{})
+	return nil
+}
+
+// get session id of this mysql session store
+func (st *MysqlSessionStore) SessionID() string {
+	return st.sid
+}
+
+// save mysql session values to database.
+// must call this method to save values to database.
+func (st *MysqlSessionStore) SessionRelease(w http.ResponseWriter) {
+	defer st.c.Close()
+	b, err := encodeGob(st.values)
+	if err != nil {
+		return
+	}
+	st.c.Exec("UPDATE session set `session_data`=?, `session_expiry`=? where session_key=?",
+		b, time.Now().Unix(), st.sid)
+
+}
+
+// mysql session provider
+type MysqlProvider struct {
+	maxlifetime int64
+	savePath    string
+}
+
+// connect to mysql
+func (mp *MysqlProvider) connectInit() *sql.DB {
+	db, e := sql.Open("mysql", mp.savePath)
+	if e != nil {
+		return nil
+	}
+	return db
+}
+
+// init mysql session.
+// savepath is the connection string of mysql.
+func (mp *MysqlProvider) SessionInit(maxlifetime int64, savePath string) error {
+	mp.maxlifetime = maxlifetime
+	mp.savePath = savePath
+	return nil
+}
+
+// get mysql session by sid
+func (mp *MysqlProvider) SessionRead(sid string) (SessionStore, error) {
+	c := mp.connectInit()
+	row := c.QueryRow("select session_data from session where session_key=?", sid)
+	var sessiondata []byte
+	err := row.Scan(&sessiondata)
+	if err == sql.ErrNoRows {
+		c.Exec("insert into session(`session_key`,`session_data`,`session_expiry`) values(?,?,?)",
+			sid, "", time.Now().Unix())
+	}
+	var kv map[interface{}]interface{}
+	if len(sessiondata) == 0 {
+		kv = make(map[interface{}]interface{})
+	} else {
+		kv, err = decodeGob(sessiondata)
+		if err != nil {
+			return nil, err
+		}
+	}
+	rs := &MysqlSessionStore{c: c, sid: sid, values: kv}
+	return rs, nil
+}
+
+// check mysql session exist
+func (mp *MysqlProvider) SessionExist(sid string) bool {
+	c := mp.connectInit()
+	defer c.Close()
+	row := c.QueryRow("select session_data from session where session_key=?", sid)
+	var sessiondata []byte
+	err := row.Scan(&sessiondata)
+	if err == sql.ErrNoRows {
+		return false
+	} else {
+		return true
+	}
+}
+
+// generate new sid for mysql session
+func (mp *MysqlProvider) SessionRegenerate(oldsid, sid string) (SessionStore, error) {
+	c := mp.connectInit()
+	row := c.QueryRow("select session_data from session where session_key=?", oldsid)
+	var sessiondata []byte
+	err := row.Scan(&sessiondata)
+	if err == sql.ErrNoRows {
+		c.Exec("insert into session(`session_key`,`session_data`,`session_expiry`) values(?,?,?)", oldsid, "", time.Now().Unix())
+	}
+	c.Exec("update session set `session_key`=? where session_key=?", sid, oldsid)
+	var kv map[interface{}]interface{}
+	if len(sessiondata) == 0 {
+		kv = make(map[interface{}]interface{})
+	} else {
+		kv, err = decodeGob(sessiondata)
+		if err != nil {
+			return nil, err
+		}
+	}
+	rs := &MysqlSessionStore{c: c, sid: sid, values: kv}
+	return rs, nil
+}
+
+// delete mysql session by sid
+func (mp *MysqlProvider) SessionDestroy(sid string) error {
+	c := mp.connectInit()
+	c.Exec("DELETE FROM session where session_key=?", sid)
+	c.Close()
+	return nil
+}
+
+// delete expired values in mysql session
+func (mp *MysqlProvider) SessionGC() {
+	c := mp.connectInit()
+	c.Exec("DELETE from session where session_expiry < ?", time.Now().Unix()-mp.maxlifetime)
+	c.Close()
+	return
+}
+
+// count values in mysql session
+func (mp *MysqlProvider) SessionAll() int {
+	c := mp.connectInit()
+	defer c.Close()
+	var total int
+	err := c.QueryRow("SELECT count(*) as num from session").Scan(&total)
+	if err != nil {
+		return 0
+	}
+	return total
+}
+
+func init() {
+	Register("mysql", mysqlpder)
+}