gin 中使用session

在gin中我们推荐一个类库github地址如下：
https://github.com/gin-contrib/sessions

具体使用方法

package main

import (
  "github.com/gin-contrib/sessions"
  "github.com/gin-contrib/sessions/cookie"
  "github.com/gin-gonic/gin"
)

func main() {
  r := gin.Default()
  store := cookie.NewStore([]byte("secret"))
  
  //路由上加入session中间件
  r.Use(sessions.Sessions("mysession", store))

  r.GET("/hello", func(c *gin.Context) {
    session := sessions.Default(c)

    if session.Get("hello") != "world" {
      session.Set("hello", "world")
      //记着调用save方法，写入session
      session.Save()
    }

    c.JSON(200, gin.H{"hello": session.Get("hello")})
  })
  r.Run(":8080")
}