整合dxvgef/session实现Session

使用dxvgef/session包实现数据存储于Redis的Session功能：

  1. package main
  2.  
  3. import (
  4.     "github.com/dxvgef/httpdispatcher"
  5.     "net/http"
  6.     "log"
  7.     "github.com/dxvgef/sessions"
  8.     "time"
  9. )
  10.  
  11. //session管理器实例
  12. var SessionManager *sessions.SessionManager
  13.  
  14. func main()  {
  15.     var err error
  16.  
  17.     //获得一个调度器的实例化对象
  18.     var dispatcher = httpdispatcher.New()
  19.  
  20.     //设置参数并获得session管理器实例
  21.     SessionManager, err = sessions.NewSessions(&sessions.Config{
  22.         CookieName:     "sessionid",
  23.         HttpOnly:       true,
  24.         Path:           "/",
  25.         MaxAge:         120,
  26.         IdleTime:       time.Duration(20) * time.Minute,
  27.         Secure:         false,
  28.         RedisAddr:      "127.0.0.1:6379",
  29.         RedisDB:        0,
  30.         RedisPassword:  "",
  31.         RedisKeyPrefix: "sess",
  32.         Key:            "key",
  33.     })
  34.     if err != nil {
  35.         log.Println(err.Error())
  36.         return
  37.     }
  38.  
  39.     //在入口路由里传入session处理器
  40.     router := dispatcher.Router.GROUP("", func(ctx *httpdispatcher.Context) error {
  41.         //更新session空闲时间
  42.         err := SessionManager.UpdateIdleTime(ctx.Request, ctx.ResponseWriter)
  43.         if err != nil {
  44.             return ctx.Event(err)
  45.         }
  46.         //继续执行下一个处理器
  47.         return ctx.Next(true)
  48.     })
  49.     //在路由组中定义GET路由测试session读写
  50.     router.GET("/", func(ctx *httpdispatcher.Context) error {
  51.         //使用session
  52.         session, err := SessionManager.UseSession(ctx.Request, ctx.ResponseWriter)
  53.         if err != nil {
  54.             return ctx.Event(err)
  55.         }
  56.  
  57.         //在session中写入数据
  58.         if err := session.Set("test", "ok"); err != nil {
  59.             return ctx.Event(err)
  60.         }
  61.  
  62.         //从session中读取数据
  63.         if test, err := session.Get("test").String(); err != nil {
  64.             return ctx.Event(err)
  65.         } else {
  66.             log.Println(test)
  67.         }
  68.  
  69.         return nil
  70.     })
  71.  
  72.     svr := &http.Server{
  73.         Addr:         ":8080",
  74.         Handler:      dispatcher,
  75.     }
  76.     if err := svr.ListenAndServe(); err != nil {
  77.         log.Fatal(err.Error())
  78.     }
  79. }