add RegisterServerFile & support EnabledAutoHEAD\EnabledAutoOPTIONS in ServerFile

[devfeel]

• New Feature: HttpServer & Router add RegisterServerFile use to register ServerFile router with routeMethod method on http.FileServer
• Update: ServerFile add support for EnabledAutoHEAD\EnabledAutoOPTIONS
• Detail:
  • when use ServerFile, default routeMethod is GET
  • you can use RegisterServerFile specify other HttpMethod, like "POST"
• Example:

	server.RegisterServerFile(dotweb.RouteMethod_POST, "/dst/*", "/home/www/")

• How To:
  • how to add support "HEAD" method for all requests in your httpserver?

  func main() {
  	app := dotweb.Classic("/home/logs/wwwroot/")
  
    // if use this, all router will auto add "HEAD" method support
    // default is false
    app.HttpServer.SetEnabledAutoHEAD(true)
  
  	app.HttpServer.GET("/index", func(ctx dotweb.Context) error{
  		return ctx.WriteString("welcome to my first web!")
  	})
  
  	err := app.StartServer(80)
      fmt.Println("dotweb.StartServer error => ", err)
  }

• 2019-01-03 10:00