import (

    "io/ioutil"

    "github.com/gin-contrib/static"

    "github.com/gin-gonic/gin"

)

app := gin.Default()

//加载静态资源

app.Use(static.Serve("/", static.LocalFile("dist", true)))

app.NoRoute(func(c *gin.Context) {

    accept := c.Request.Header.Get("Accept")

    flag := strings.Contains(accept, "text/html")

    if flag {

        content, err := ioutil.ReadFile("dist/index.html")

        if (err) != nil {

            c.Writer.WriteHeader(404)

            c.Writer.WriteString("Not Found")

            return

        }

        c.Writer.WriteHeader(200)

        c.Writer.Header().Add("Accept", "text/html")

        c.Writer.Write((content))

        c.Writer.Flush()

    }

})