109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
// 会话操作.
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// Wide 服务器端需要维护两种会话：
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// 1. HTTP 会话：主要用于验证登录
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// 2. Wide 会话：浏览器 tab 打开/刷新会创建一个，并和 HTTP 会话进行关联
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//
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// TODO: 当 HTTP 会话失效时，关联的 Wide 会话也会做失效处理：释放所有和该会话相关的资源，例如运行中的程序进程、事件队列等
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package session
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import (
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"math/rand"
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"strconv"
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"sync"
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"time"
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"github.com/golang/glog"
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"github.com/gorilla/sessions"
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)
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const (
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SessionStateActive = iota // 会话状态：活的
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)
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// 用户 HTTP 会话，用于验证登录.
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var HTTPSession = sessions.NewCookieStore([]byte("BEYOND"))
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// Wide 会话，对应一个浏览器 tab.
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type WideSession struct {
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Id string // 唯一标识
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HTTPSession *sessions.Session // 关联的 HTTP 会话
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State int // 状态
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Created time.Time // 创建时间
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Updated time.Time // 最近一次使用时间
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}
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type Sessions []*WideSession
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// 所有 Wide 会话集.
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var WideSessions Sessions
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// 排它锁，防止并发问题.
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var mutex sync.Mutex
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// 创建一个 Wide 会话.
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func (sessions *Sessions) New(httpSession *sessions.Session) *WideSession {
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mutex.Lock()
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defer mutex.Unlock()
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rand.Seed(time.Now().UnixNano())
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id := strconv.Itoa(rand.Int())
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now := time.Now()
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ret := &WideSession{
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Id: id,
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HTTPSession: httpSession,
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State: SessionStateActive,
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Created: now,
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Updated: now,
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}
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*sessions = append(*sessions, ret)
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return ret
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}
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// 移除 Wide 会话.
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func (sessions *Sessions) Remove(sid string) {
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mutex.Lock()
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defer mutex.Unlock()
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for i, s := range *sessions {
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if s.Id == sid {
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*sessions = append((*sessions)[:i], (*sessions)[i+1:]...)
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glog.V(3).Infof("Has [%d] wide sessions currently", len(*sessions))
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}
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}
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}
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// 获取 HTTP 会话关联的所有 Wide 会话.
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func (sessions *Sessions) GetByHTTPSession(httpSession *sessions.Session) []*WideSession {
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mutex.Lock()
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defer mutex.Unlock()
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ret := []*WideSession{}
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for _, s := range *sessions {
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if s.HTTPSession.ID == httpSession.ID {
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ret = append(ret, s)
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}
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}
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return ret
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}
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// 移除 HTTP 会话关联的所有 Wide 会话.
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func (sessions *Sessions) RemoveByHTTPSession(httpSession *sessions.Session) {
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mutex.Lock()
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defer mutex.Unlock()
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for i, s := range *sessions {
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if s.HTTPSession.ID == httpSession.ID {
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*sessions = append((*sessions)[:i], (*sessions)[i+1:]...)
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glog.V(3).Infof("Has [%d] wide sessions currently", len(*sessions))
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}
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}
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}
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