路由执行体

Tango 支持 5 种形式的函数或结构体方法作为执行体：

• func()
• func(http.ResponseWriter, *http.Request)
• func(*tango.Context)
• func(http.Response.Writer)
• func(*http.Request)

• struct.Get()

• func()

  t := tango.Classic()
  t.Get("/", func() string {
    return "hello tango"
  })

• func(http.ResponseWriter, *http.Request)

  t := tango.Classic()
  t.Post("/", func(w http.ResponseWriter, *http.Request) {
    w.Write([]byte("hello tango"))
  })

• func(http.ResponseWriter)

  t := tango.Classic()
  t.Post("/", func(w http.ResponseWriter) {
    w.Write([]byte("hello tango"))
  })

• func(*http.Request)

  t := tango.Classic()
  t.Post("/", func(req *http.Request) string {
    return req.FormValue("key")
  })

• func(*tango.Context)

  t := tango.Classic()
  t.Get("/:name", func(ctx *tango.Context) {
    ctx.Write([]byte("hello " + ctx.Params().Get(":name")))
  })

• structs

  type Action struct {}
  func (a *Action) Get() string {
    return "haha"
  }
  t := tango.Classic()
  t.Get("/:name", new(Action))