go中间件制作

参考gin中间件

type Context struct {
	handlers []func(c *Context)
	index int8
}

func (c *Context) Use(f func(c *Context))  {
	c.handlers = append(c.handlers, f)
}

func (c *Context) Next()  {
	c.index++
	c.handlers[c.index](c)
}

func (c *Context) GET(path string, f func(c *Context))  {
	c.handlers = append(c.handlers, f)
}

func (c *Context) Run()  {
	c.handlers[0](c)
}



func main() {

	c := &Context{}

	c.Use(func(c *Context) {
		fmt.Println("mid1 start")
		c.Next()
		fmt.Println("mid1 end")
	})

	c.Use(func(c *Context) {
		fmt.Println("mid2 start")
		c.Next()
		fmt.Println("mid2 end")
	})

	c.GET("?", func(c *Context) {
		fmt.Println("GET handler func")
	})

	c.Run()
}