mirror of https://github.com/grafana/grafana.git
146 lines
2.9 KiB
Go
146 lines
2.9 KiB
Go
package middleware
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import (
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"time"
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"github.com/Unknwon/macaron"
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"github.com/macaron-contrib/session"
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_ "github.com/macaron-contrib/session/memcache"
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_ "github.com/macaron-contrib/session/mysql"
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_ "github.com/macaron-contrib/session/postgres"
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_ "github.com/macaron-contrib/session/redis"
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)
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const (
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SESS_KEY_USERID = "uid"
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SESS_KEY_APIKEY = "apikey_id" // used fror render requests with api keys
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)
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var sessionManager *session.Manager
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var sessionOptions *session.Options
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var startSessionGC func()
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var getSessionCount func() int
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func init() {
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startSessionGC = func() {
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sessionManager.GC()
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time.AfterFunc(time.Duration(sessionOptions.Gclifetime)*time.Second, startSessionGC)
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}
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getSessionCount = func() int {
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return sessionManager.Count()
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}
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}
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func prepareOptions(opt *session.Options) *session.Options {
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if len(opt.Provider) == 0 {
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opt.Provider = "memory"
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}
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if len(opt.ProviderConfig) == 0 {
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opt.ProviderConfig = "data/sessions"
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}
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if len(opt.CookieName) == 0 {
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opt.CookieName = "grafana_sess"
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}
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if len(opt.CookiePath) == 0 {
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opt.CookiePath = "/"
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}
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if opt.Gclifetime == 0 {
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opt.Gclifetime = 3600
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}
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if opt.Maxlifetime == 0 {
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opt.Maxlifetime = opt.Gclifetime
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}
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if opt.IDLength == 0 {
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opt.IDLength = 16
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}
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return opt
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}
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func Sessioner(options *session.Options) macaron.Handler {
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var err error
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sessionOptions = prepareOptions(options)
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sessionManager, err = session.NewManager(options.Provider, *options)
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if err != nil {
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panic(err)
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}
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go startSessionGC()
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return func(ctx *Context) {
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ctx.Next()
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if err = ctx.Session.Release(); err != nil {
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panic("session(release): " + err.Error())
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}
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}
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}
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func GetSession() SessionStore {
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return &SessionWrapper{manager: sessionManager}
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}
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type SessionStore interface {
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// Set sets value to given key in session.
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Set(interface{}, interface{}) error
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// Get gets value by given key in session.
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Get(interface{}) interface{}
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// ID returns current session ID.
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ID() string
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// Release releases session resource and save data to provider.
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Release() error
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// Destory deletes a session.
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Destory(*Context) error
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// init
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Start(*Context) error
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}
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type SessionWrapper struct {
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session session.RawStore
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manager *session.Manager
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}
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func (s *SessionWrapper) Start(c *Context) error {
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var err error
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s.session, err = s.manager.Start(c.Context)
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return err
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}
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func (s *SessionWrapper) Set(k interface{}, v interface{}) error {
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if s.session != nil {
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return s.session.Set(k, v)
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}
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return nil
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}
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func (s *SessionWrapper) Get(k interface{}) interface{} {
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if s.session != nil {
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return s.session.Get(k)
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}
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return nil
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}
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func (s *SessionWrapper) ID() string {
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if s.session != nil {
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return s.session.ID()
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}
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return ""
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}
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func (s *SessionWrapper) Release() error {
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if s.session != nil {
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return s.session.Release()
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}
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return nil
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}
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func (s *SessionWrapper) Destory(c *Context) error {
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if s.session != nil {
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if err := s.manager.Destory(c.Context); err != nil {
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return err
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}
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s.session = nil
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}
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return nil
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}
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