如何将我的AppHandler添加到路线中？

问题描述：

I am trying to implement an appHandler as described in The Go Blog: Error handling and Go. I have the appHandler, now I'm just trying to hook it up to my routes. The following works:

router := new(mux.Router)
router.Handle("/my/route/", handlers.AppHandler(handlers.MyRoute))

But, I want to be able to allow GET requests as well as having "StrictSlash(true)". I have:

type Routes []Route
type Route struct {
    Method      string
    Pattern     string
    HandlerFunc http.HandlerFunc
}


var routes = Routes{
    Route{"GET", "/my/route/", handlers.AppHandler(handlers.MyRoute)}
} 
router := mux.NewRouter().StrictSlash(true)
for _, route := range routes {
    var handler http.Handler
    handler = route.HandlerFunc
    router.Methods(route.Method).Path(route.Pattern).Handler(handler)
}

AppHandler looks like:

type AppHandler func(http.ResponseWriter, *http.Request) *appError

func (fn AppHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    // blah, blah, blah
}

I get an error:

cannot use handlers.AppHandler(handlers.MyRoute) (type handlers.AppHandler) as type http.HandlerFunc in field value

我正在尝试实现appHandler code>： //blog.golang.org/error-handling-and-go#TOC_3“。 rel =“ nofollow”> Go博客：错误处理和Go 。我有appHandler code>，现在我只是想将其连接到我的路线。以下工作原理： p>

  router：= new（mux.Router）
router.Handle（“ / my / route /”，handlers.AppHandler（handlers.MyRoute））\  n  code>  pre> 
 
 但是，我希望能够允许GET请求以及具有“ StrictSlash（true）”。 我有： p> 
 
 
 类型Routes [] Route 
type Route struct {
方法字符串
模式字符串
 HandlerFunc http.HandlerFunc 
} 
 
 
var 路线=路线{
路线{“ GET”，“ / my / route /”，handlers.AppHandler（handlers.MyRoute）} 
} 
router：= mux.NewRouter（）。StrictSlash（true）
用于_，  route：=范围路由{
 var handler http.Handler 
 handler = route.HandlerFunc 
 router.Methods（route.Method）.Path（route.Pattern）.Handler（handler）
} 
  code  >  pre> 
 
  AppHandler看起来像： p> 
 
 
  type AppHandler func（http.ResponseWriter，* http.Request）* appError 
 
func（  fn AppHandler）ServeHTTP（w http.ResponseWriter，r * http.Request）{
 //等等，等等，
} 
  code>  pre> 
 
 我收到错误 ： p> 
 
 
 不能在字段值中使用handlers.AppHandler（handlers.MyRoute）（类型handlers.AppHandler）作为http.HandlerFunc类型
  code>  pre> \  n  div>

答

Your AppHandler isn't a http.HandlerFunc, it's a http.Handler.

A http.HandlerFunc is just a function that takes both a http.ResponseWriter and a *http.Request.

http.Handler is an interface that is satisfied by any type that has a method ServeHTTP(w http.ResponseWriter, r *http.Request)

Change your struct to something like

type Route struct {
    Method  string
    Pattern string
    Handler http.Handler
}

And then at the bottom you can probably do

for _, route := range routes {
    router.Methods(route.Method).Path(route.Pattern).Handler(route.Handler)
}

如何将我的AppHandler添加到路线中？

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