1. 重定向

package main
import (
    "net/http"
    "github.com/gin-gonic/gin"
)
func main() {
    r := gin.Default()
    r.GET("/index", func(c *gin.Context) {
        c.Redirect(http.StatusMovedPermanently, "http://www.5lmh.com")
    })
    r.Run()
}